Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Eureka, CA
Issued by NWS Eureka, CA
642
FNUS56 KEKA 160737
FWFEKA
FIRE WEATHER PLANNING FORECAST FOR NORTHWEST CALIFORNIA
NATIONAL WEATHER SERVICE Eureka CA
1237 AM PDT Wed Sep 16 2026
...A SLIGHT CHANCE FOR THUNDERSTORMS IN TRINITY COUNTY AND
NORTHEAST MENDOCINO COUNTY THIS AFTERNOON AND EVENING...
.DISCUSSION...This afternoon an upper low has the potential to
bring a few thunderstorms to Trinity county and northeastern
Mendocino county. These may also spread into northern Humboldt and
Del Norte counties. This will also bring slightly cooler
temperatures and higher RH. A few showers or thunderstorms are
possible again on Thursday in Trinity county as well. Warm and dry
weather is expected to return Friday and Saturday.
CAZ401-170115-
Coastal Del Norte-
1237 AM PDT Wed Sep 16 2026
.TODAY...
* Sky/Weather............Sunny then becoming partly cloudy. Slight
chance of showers and thunderstorms late
in the afternoon.
* Chance Lightning.......10%.
* Max Temperature.......
Valleys/lwr slopes...67-73
Ridges/upr slopes....66-72
* Min Humidity.......
Valleys/lwr slopes...57-71 percent
Ridges/upr slopes....62-72 percent
* 20-Foot Winds...
Valleys/lwr slopes...North winds 5 to 6 mph...shifting to the
northwest 5 to 8 mph in the afternoon.
Ridges/upr slopes....Variable 2 to 4 mph...becoming northwest 5
mph in the afternoon.
* Mixing Height..........1900 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Partly cloudy then becoming mostly cloudy.
Slight chance of thunderstorms early in
the evening. Slight chance of showers in
the evening.
* Chance Lightning.......10%.
* Min Temperature.......
Valleys/lwr slopes...52-55
Ridges/upr slopes....52-55
* Max Humidity.......
Valleys/lwr slopes...86-97 percent
Ridges/upr slopes....82-92 percent
* 20-Foot Winds...
Valleys/lwr slopes...East winds 5 to 7 mph.
Ridges/upr slopes....East winds 5 to 7 mph.
* Mixing Height..........600 ft AGL.
* Chc of Wetting Rain....10 percent.
.THURSDAY...
* Sky/Weather............Mostly cloudy.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...64-68
Ridges/upr slopes....63-68
* Min Humidity.......
Valleys/lwr slopes...71-84 percent
Ridges/upr slopes....71-81 percent
* 20-Foot Winds...
Valleys/lwr slopes...Light winds 2 to 4 mph...becoming
southwest 5 to 6 mph in the afternoon.
Ridges/upr slopes....Variable 2 to 4 mph...becoming southwest 5
mph in the afternoon.
* Mixing Height..........2100 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY NIGHT...
* Sky/Weather............Mostly cloudy. Patchy fog in the late
evening and overnight.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...51-54
Ridges/upr slopes....50-53
* Max Humidity.......
Valleys/lwr slopes...93-100 percent
Ridges/upr slopes....91-100 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southeast winds 5 mph in the
evening...becoming light winds 1 to 3 mph.
Ridges/upr slopes....South winds 5 mph in the
evening...becoming downslope/downvalley 1
to 3 mph.
* Mixing Height..........900 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ402-170115-
Interior Del Norte Including the Smith River Valley-
1237 AM PDT Wed Sep 16 2026
.TODAY...
* Sky/Weather............Sunny then becoming partly cloudy. Slight
chance of showers and thunderstorms in the
afternoon.
* Chance Lightning.......0% increasing to 10% in the afternoon.
* Max Temperature.......
Valleys/lwr slopes...72-80
Ridges/upr slopes....65-73
* Min Humidity.......
Valleys/lwr slopes...55-65 percent
Ridges/upr slopes....51-61 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northeast winds 5 to 6 mph...shifting to
the northwest in the afternoon.
Ridges/upr slopes....North winds 5 to 8 mph.
* Mixing Height..........4600 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Partly cloudy. Chance of showers and
slight chance of thunderstorms early in
the evening. Slight chance of showers late
in the evening.
* Chance Lightning.......10%.
* Min Temperature.......
Valleys/lwr slopes...52-55
Ridges/upr slopes....50-55
* Max Humidity.......
Valleys/lwr slopes...72-87 percent
Ridges/upr slopes....63-78 percent
* 20-Foot Winds...
Valleys/lwr slopes...East winds 5 to 7 mph.
Ridges/upr slopes....East winds 5 to 7 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....10 percent.
.THURSDAY...
* Sky/Weather............Partly cloudy then becoming mostly cloudy.
Slight chance of showers.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...68-76
Ridges/upr slopes....61-69
* Min Humidity.......
Valleys/lwr slopes...61-76 percent
Ridges/upr slopes....59-74 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
west 5 to 6 mph in the afternoon.
Ridges/upr slopes....East winds 5 mph...shifting to the west in
the afternoon.
* Mixing Height..........3300 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY NIGHT...
* Sky/Weather............Mostly cloudy then becoming mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...50-53
Ridges/upr slopes....49-53
* Max Humidity.......
Valleys/lwr slopes...82-97 percent
Ridges/upr slopes....71-86 percent
* 20-Foot Winds...
Valleys/lwr slopes...Downslope/downvalley 1 to 3 mph.
Ridges/upr slopes....Variable 1 to 3 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ403-170115-
Northeastern Interior Humboldt and Southwestern Siskiyou
Including Orleans-
1237 AM PDT Wed Sep 16 2026
.TODAY...
* Sky/Weather............Sunny then becoming partly cloudy. Slight
chance of showers in the late morning and
afternoon. Slight chance of thunderstorms
in the afternoon.
* Chance Lightning.......0% increasing to 10% in the afternoon.
* Max Temperature.......
Valleys/lwr slopes...78-86
Ridges/upr slopes....64-72
* Min Humidity.......
Valleys/lwr slopes...27-35 percent
Ridges/upr slopes....38-48 percent
* 20-Foot Winds...
Valleys/lwr slopes...North winds 5 to 6 mph...shifting to the
northwest in the afternoon.
Ridges/upr slopes....Northeast winds 5 to 10 mph.
* Mixing Height..........8600 ft AGL.
* Chc of Wetting Rain....10 percent.
.TONIGHT...
* Sky/Weather............Partly cloudy. Slight chance of showers
and thunderstorms in the evening.
* Chance Lightning.......10% decreasing to 0% after midnight.
* Min Temperature.......
Valleys/lwr slopes...52-55
Ridges/upr slopes....48-52
* Max Humidity.......
Valleys/lwr slopes...68-83 percent
Ridges/upr slopes....55-67 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northeast winds 5 to 7 mph.
Ridges/upr slopes....Northeast winds 5 to 7 mph.
* Mixing Height..........300 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......10%.
* Max Temperature.......
Valleys/lwr slopes...77-85
Ridges/upr slopes....62-70
* Min Humidity.......
Valleys/lwr slopes...32-39 percent
Ridges/upr slopes....41-51 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 1 to 3 mph.
Ridges/upr slopes....East winds 5 mph...shifting to the west in
the afternoon.
* Mixing Height..........7000 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY NIGHT...
* Sky/Weather............Mostly cloudy then becoming mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...51-55
Ridges/upr slopes....48-53
* Max Humidity.......
Valleys/lwr slopes...73-88 percent
Ridges/upr slopes....64-74 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 mph in the evening...becoming
downslope/downvalley 2 to 4 mph.
Ridges/upr slopes....West winds 5 to 6 mph...shifting to the
east 5 mph after midnight.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ404-170115-
Northern Coastal Humboldt-
1237 AM PDT Wed Sep 16 2026
.TODAY...
* Sky/Weather............Mostly cloudy then becoming partly cloudy.
Patchy fog in the morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...64-69
Ridges/upr slopes....around 61
* Min Humidity.......
Valleys/lwr slopes...65-80 percent
Ridges/upr slopes....75 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 7 mph.
Ridges/upr slopes....Northwest winds 5 to 8 mph.
* Mixing Height..........1900 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Partly cloudy.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...52-55
Ridges/upr slopes....around 52
* Max Humidity.......
Valleys/lwr slopes...87-97 percent
Ridges/upr slopes....89 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southwest winds 5 mph...shifting to the
southeast after midnight.
Ridges/upr slopes....Variable 1 to 3 mph.
* Mixing Height..........600 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY...
* Sky/Weather............Partly cloudy.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...66-73
Ridges/upr slopes....around 67
* Min Humidity.......
Valleys/lwr slopes...65-80 percent
Ridges/upr slopes....66 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southeast winds 5 mph...shifting to the
west 5 to 6 mph in the afternoon.
Ridges/upr slopes....Variable 1 to 3 mph.
* Mixing Height..........2800 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY NIGHT...
* Sky/Weather............Partly cloudy then becoming mostly cloudy.
Patchy fog in the late evening and
overnight.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...51-54
Ridges/upr slopes....around 53
* Max Humidity.......
Valleys/lwr slopes...93-100 percent
Ridges/upr slopes....92 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southwest winds 5 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
Ridges/upr slopes....Variable 1 to 3 mph.
* Mixing Height..........700 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ405-170115-
Northwestern Interior Humboldt Including the Bald Hills-
1237 AM PDT Wed Sep 16 2026
.TODAY...
* Sky/Weather............Sunny then becoming partly cloudy. Patchy
fog late in the morning. Slight chance of
showers in the late morning and afternoon.
Slight chance of thunderstorms in the
afternoon.
* Chance Lightning.......10%.
* Max Temperature.......
Valleys/lwr slopes...70-78
Ridges/upr slopes....65-73
* Min Humidity.......
Valleys/lwr slopes...58-68 percent
Ridges/upr slopes....56-66 percent
* 20-Foot Winds...
Valleys/lwr slopes...East winds 5 mph...shifting to the
northwest 5 to 6 mph in the afternoon.
Ridges/upr slopes....Variable 2 to 4 mph...becoming northwest 5
to 6 mph in the afternoon.
* Mixing Height..........3600 ft AGL.
* Chc of Wetting Rain....10 percent.
.TONIGHT...
* Sky/Weather............Partly cloudy. Slight chance of showers
and thunderstorms early in the evening.
* Chance Lightning.......10%.
* Min Temperature.......
Valleys/lwr slopes...50-55
Ridges/upr slopes....50-54
* Max Humidity.......
Valleys/lwr slopes...75-90 percent
Ridges/upr slopes....69-84 percent
* 20-Foot Winds...
Valleys/lwr slopes...East winds 5 mph.
Ridges/upr slopes....East winds 5 to 7 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....10 percent.
.THURSDAY...
* Sky/Weather............Sunny then becoming partly cloudy.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...69-77
Ridges/upr slopes....65-73
* Min Humidity.......
Valleys/lwr slopes...65-75 percent
Ridges/upr slopes....62-72 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southeast winds 5 mph...shifting to the
west in the afternoon.
Ridges/upr slopes....Southeast winds 5 to 6 mph...shifting to
the west 5 mph in the afternoon.
* Mixing Height..........3400 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY NIGHT...
* Sky/Weather............Partly cloudy.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...49-54
Ridges/upr slopes....49-53
* Max Humidity.......
Valleys/lwr slopes...82-97 percent
Ridges/upr slopes....74-89 percent
* 20-Foot Winds...
Valleys/lwr slopes...Downslope/downvalley 1 to 3 mph.
Ridges/upr slopes....Variable 1 to 3 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ406-170115-
Eastern Interior Humboldt Including Willow Creek and Hoopa-
1237 AM PDT Wed Sep 16 2026
.TODAY...
* Sky/Weather............Sunny then becoming partly cloudy. Slight
chance of showers in the late morning and
afternoon. Slight chance of thunderstorms
in the afternoon.
* Chance Lightning.......0% increasing to 10% in the afternoon.
* Max Temperature.......
Valleys/lwr slopes...77-85
Ridges/upr slopes....63-71
* Min Humidity.......
Valleys/lwr slopes...35-45 percent
Ridges/upr slopes....40-50 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
north 5 to 6 mph in the afternoon.
Ridges/upr slopes....North winds 5 to 7 mph.
* Mixing Height..........6700 ft AGL.
* Chc of Wetting Rain....10 percent.
.TONIGHT...
* Sky/Weather............Mostly clear. Slight chance of
thunderstorms early in the evening. Slight
chance of showers in the evening.
* Chance Lightning.......10% decreasing to 0% after midnight.
* Min Temperature.......
Valleys/lwr slopes...50-53
Ridges/upr slopes....48-52
* Max Humidity.......
Valleys/lwr slopes...70-85 percent
Ridges/upr slopes....55-70 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 6 mph...shifting to
the southeast 5 mph after midnight.
Ridges/upr slopes....North winds 5 to 6 mph...shifting to the
east after midnight.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....10 percent.
.THURSDAY...
* Sky/Weather............Sunny then becoming partly cloudy.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...77-85
Ridges/upr slopes....63-71
* Min Humidity.......
Valleys/lwr slopes...37-47 percent
Ridges/upr slopes....42-52 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
west 5 mph in the afternoon.
Ridges/upr slopes....Southeast winds 5 to 6 mph...shifting to
the west 5 mph in the afternoon.
* Mixing Height..........6100 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY NIGHT...
* Sky/Weather............Mostly cloudy then becoming mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...49-53
Ridges/upr slopes....48-53
* Max Humidity.......
Valleys/lwr slopes...76-91 percent
Ridges/upr slopes....61-75 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 mph in the evening...becoming
downslope/downvalley 2 to 4 mph.
Ridges/upr slopes....West winds 5 mph...shifting to the east
after midnight.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ407-170115-
Southwestern Humboldt Including the King Range and the Eel River
Valley-
1237 AM PDT Wed Sep 16 2026
.TODAY...
* Sky/Weather............Partly cloudy then becoming sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...70-78
Ridges/upr slopes....61-68
* Min Humidity.......
Valleys/lwr slopes...49-59 percent
Ridges/upr slopes....57-72 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 7 mph.
Ridges/upr slopes....Northwest winds 5 to 8 mph.
* Mixing Height..........2500 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Partly cloudy.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...49-52
Ridges/upr slopes....50-53
* Max Humidity.......
Valleys/lwr slopes...85-100 percent
Ridges/upr slopes....76-90 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 6 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
Ridges/upr slopes....North winds 5 to 6 mph...shifting to the
southeast 5 mph after midnight.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY...
* Sky/Weather............Partly cloudy then becoming sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...70-78
Ridges/upr slopes....64-70
* Min Humidity.......
Valleys/lwr slopes...50-60 percent
Ridges/upr slopes....58-73 percent
* 20-Foot Winds...
Valleys/lwr slopes...South winds 5 to 8 mph.
Ridges/upr slopes....South winds 5 to 8 mph.
* Mixing Height..........2800 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY NIGHT...
* Sky/Weather............Mostly clear. Patchy fog after midnight.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...49-53
Ridges/upr slopes....51-54
* Max Humidity.......
Valleys/lwr slopes...86-100 percent
Ridges/upr slopes....78-93 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southwest winds 5 mph in the
evening...becoming downslope/downvalley 1
to 3 mph.
Ridges/upr slopes....Variable 1 to 3 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ408-170115-
Southeastern Interior Humboldt Including Kneeland and Alderpoint-
1237 AM PDT Wed Sep 16 2026
.TODAY...
* Sky/Weather............Partly cloudy. Patchy fog early in the
morning. Slight chance of showers in the
late morning and afternoon. Slight chance
of thunderstorms late in the afternoon.
* Chance Lightning.......0% increasing to 10% in the afternoon.
* Max Temperature.......
Valleys/lwr slopes...70-78
Ridges/upr slopes....64-69
* Min Humidity.......
Valleys/lwr slopes...54-64 percent
Ridges/upr slopes....63-73 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 7 mph.
Ridges/upr slopes....Northwest winds 5 to 7 mph.
* Mixing Height..........4900 ft AGL.
* Chc of Wetting Rain....10 percent.
.TONIGHT...
* Sky/Weather............Mostly clear. Slight chance of showers and
thunderstorms early in the evening.
* Chance Lightning.......10% decreasing to 0% after midnight.
* Min Temperature.......
Valleys/lwr slopes...50-54
Ridges/upr slopes....46-54
* Max Humidity.......
Valleys/lwr slopes...79-94 percent
Ridges/upr slopes....70-85 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 6 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
Ridges/upr slopes....Northeast winds 5 mph...shifting to the
east 5 to 6 mph after midnight.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....10 percent.
.THURSDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...71-79
Ridges/upr slopes....64-71
* Min Humidity.......
Valleys/lwr slopes...51-61 percent
Ridges/upr slopes....56-66 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
southwest 5 to 6 mph in the afternoon.
Ridges/upr slopes....Southeast winds 5 mph...shifting to the
southwest 5 to 6 mph in the afternoon.
* Mixing Height..........5000 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY NIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...50-54
Ridges/upr slopes....46-54
* Max Humidity.......
Valleys/lwr slopes...81-96 percent
Ridges/upr slopes....72-87 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 mph in the evening...becoming
downslope/downvalley 1 to 3 mph.
Ridges/upr slopes....Northwest winds 5 to 6 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ409-170115-
Northwestern Trinity Including Salyer and Big Bar-
1237 AM PDT Wed Sep 16 2026
.TODAY...
* Sky/Weather............Sunny then becoming partly cloudy. Slight
chance of showers in the late morning and
afternoon. Slight chance of thunderstorms
in the afternoon.
* Chance Lightning.......0% increasing to 10% in the afternoon.
* Max Temperature.......
Valleys/lwr slopes...77-85
Ridges/upr slopes....61-69
* Min Humidity.......
Valleys/lwr slopes...27-35 percent
Ridges/upr slopes....36-46 percent
* 20-Foot Winds...
Valleys/lwr slopes...East winds 5 to 7 mph.
Ridges/upr slopes....East winds 5 to 9 mph.
* Mixing Height..........7800 ft AGL.
* Chc of Wetting Rain....10 percent.
.TONIGHT...
* Sky/Weather............Partly cloudy then becoming mostly clear.
Slight chance of thunderstorms early in
the evening. Slight chance of showers in
the evening.
* Chance Lightning.......10% decreasing to 0% after midnight.
* Min Temperature.......
Valleys/lwr slopes...48-52
Ridges/upr slopes....44-50
* Max Humidity.......
Valleys/lwr slopes...66-81 percent
Ridges/upr slopes....56-68 percent
* 20-Foot Winds...
Valleys/lwr slopes...East winds 5 to 7 mph.
Ridges/upr slopes....East winds 5 to 7 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....10 percent.
.THURSDAY...
* Sky/Weather............Sunny then becoming partly cloudy.
* Chance Lightning.......10%.
* Max Temperature.......
Valleys/lwr slopes...76-84
Ridges/upr slopes....60-68
* Min Humidity.......
Valleys/lwr slopes...31-39 percent
Ridges/upr slopes....45-55 percent
* 20-Foot Winds...
Valleys/lwr slopes...East winds 5 mph...shifting to the
southwest in the afternoon.
Ridges/upr slopes....Southeast winds 5 mph...shifting to the
southwest in the afternoon.
* Mixing Height..........7200 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY NIGHT...
* Sky/Weather............Mostly cloudy then becoming mostly clear.
Slight chance of showers through the
night.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...48-52
Ridges/upr slopes....47-52
* Max Humidity.......
Valleys/lwr slopes...74-89 percent
Ridges/upr slopes....62-75 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 mph in the
evening...becoming downslope/downvalley 1
to 3 mph.
Ridges/upr slopes....Northwest winds 5 mph...shifting to the
northeast after midnight.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ410-170115-
Northeastern Trinity Including Trinity Lake-
1237 AM PDT Wed Sep 16 2026
.TODAY...
* Sky/Weather............Sunny then becoming partly cloudy. Slight
chance of showers in the late morning and
afternoon. Slight chance of thunderstorms
in the afternoon.
* Chance Lightning.......10%.
* Max Temperature.......
Valleys/lwr slopes...71-79
Ridges/upr slopes....58-66
* Min Humidity.......
Valleys/lwr slopes...27-35 percent
Ridges/upr slopes....39-49 percent
* 20-Foot Winds...
Valleys/lwr slopes...North winds 5 to 6 mph...shifting to the
southeast 5 to 8 mph in the afternoon.
Ridges/upr slopes....East winds 5 to 10 mph.
* Mixing Height..........7100 ft AGL.
* Chc of Wetting Rain....10 percent.
.TONIGHT...
* Sky/Weather............Partly cloudy then becoming mostly clear.
Slight chance of thunderstorms early in
the evening. Slight chance of showers in
the evening.
* Chance Lightning.......10% decreasing to 0% after midnight.
* Min Temperature.......
Valleys/lwr slopes...around 50
Ridges/upr slopes....40-48
* Max Humidity.......
Valleys/lwr slopes...75-87 percent
Ridges/upr slopes....64-79 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northeast winds 5 to 6 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
Ridges/upr slopes....East winds 5 to 6 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....10 percent.
.THURSDAY...
* Sky/Weather............Sunny then becoming mostly cloudy. Slight
chance of showers in the late morning and
afternoon.
* Chance Lightning.......10%.
* Max Temperature.......
Valleys/lwr slopes...68-76
Ridges/upr slopes....57-65
* Min Humidity.......
Valleys/lwr slopes...39-49 percent
Ridges/upr slopes....53-63 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
southeast 5 mph in the afternoon.
Ridges/upr slopes....Variable 2 to 4 mph...becoming southwest 5
mph in the afternoon.
* Mixing Height..........6100 ft AGL.
* Chc of Wetting Rain....10 percent.
.THURSDAY NIGHT...
* Sky/Weather............Mostly cloudy then becoming partly cloudy
then becoming clear. Slight chance of
showers in the evening.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...49-52
Ridges/upr slopes....42-50
* Max Humidity.......
Valleys/lwr slopes...75-90 percent
Ridges/upr slopes....66-81 percent
* 20-Foot Winds...
Valleys/lwr slopes...Downslope/downvalley 1 to 3 mph.
Ridges/upr slopes....Variable 1 to 3 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....10 percent.
$$
CAZ411-170115-
Eastern Trinity Including Weaverville and Hayfork-
1237 AM PDT Wed Sep 16 2026
.TODAY...
* Sky/Weather............Sunny then becoming partly cloudy. Slight
chance of showers in the late morning and
afternoon. Slight chance of thunderstorms
in the afternoon.
* Chance Lightning.......0% increasing to 10% in the afternoon.
* Max Temperature.......
Valleys/lwr slopes...74-80
Ridges/upr slopes....63-71
* Min Humidity.......
Valleys/lwr slopes...27-33 percent
Ridges/upr slopes....34-44 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northeast winds 5 to 6 mph...shifting to
the east 5 to 8 mph in the afternoon.
Ridges/upr slopes....East winds 5 to 8 mph.
* Mixing Height..........7100 ft AGL.
* Chc of Wetting Rain....10 percent.
.TONIGHT...
* Sky/Weather............Partly cloudy then becoming mostly clear.
Slight chance of thunderstorms early in
the evening. Slight chance of showers in
the evening.
* Chance Lightning.......10% decreasing to 0% after midnight.
* Min Temperature.......
Valleys/lwr slopes...43-50
Ridges/upr slopes....45-48
* Max Humidity.......
Valleys/lwr slopes...77-92 percent
Ridges/upr slopes....67-82 percent
* 20-Foot Winds...
Valleys/lwr slopes...East winds 5 to 6 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
Ridges/upr slopes....East winds 5 to 7 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....10 percent.
.THURSDAY...
* Sky/Weather............Sunny then becoming partly cloudy.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...73-80
Ridges/upr slopes....64-72
* Min Humidity.......
Valleys/lwr slopes...31-40 percent
Ridges/upr slopes....40-50 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
east 5 mph in the afternoon.
Ridges/upr slopes....East winds 5 to 7 mph.
* Mixing Height..........6900 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY NIGHT...
* Sky/Weather............Partly cloudy then becoming clear. Slight
chance of showers in the evening.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...45-51
Ridges/upr slopes....47-51
* Max Humidity.......
Valleys/lwr slopes...75-90 percent
Ridges/upr slopes....66-77 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northeast winds 5 mph in the
evening...becoming downslope/downvalley 1
to 3 mph.
Ridges/upr slopes....Southwest winds 5 to 6 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....10 percent.
$$
CAZ412-170115-
Southern Trinity Including Ruth Lake and the Yolla Bollys-
1237 AM PDT Wed Sep 16 2026
.TODAY...
* Sky/Weather............Sunny then becoming partly cloudy. Slight
chance of showers in the late morning and
afternoon. Slight chance of thunderstorms
in the afternoon.
* Chance Lightning.......0% increasing to 10% in the afternoon.
* Max Temperature.......
Valleys/lwr slopes...73-81
Ridges/upr slopes....63-71
* Min Humidity.......
Valleys/lwr slopes...36-46 percent
Ridges/upr slopes....39-49 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
west 5 to 6 mph in the afternoon.
Ridges/upr slopes....Northeast winds 5 to 6 mph...shifting to
the south in the afternoon.
* Mixing Height..........6600 ft AGL.
* Chc of Wetting Rain....10 percent.
.TONIGHT...
* Sky/Weather............Partly cloudy. Slight chance of
thunderstorms early in the evening. Slight
chance of showers in the evening.
* Chance Lightning.......10%.
* Min Temperature.......
Valleys/lwr slopes...43-51
Ridges/upr slopes....42-48
* Max Humidity.......
Valleys/lwr slopes...80-95 percent
Ridges/upr slopes....75-90 percent
* 20-Foot Winds...
Valleys/lwr slopes...North winds 5 to 6 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
Ridges/upr slopes....Northeast winds 5 to 7 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....10 percent.
.THURSDAY...
* Sky/Weather............Sunny then becoming partly cloudy. Slight
chance of thunderstorms in the afternoon.
* Chance Lightning.......10%.
* Max Temperature.......
Valleys/lwr slopes...73-81
Ridges/upr slopes....63-71
* Min Humidity.......
Valleys/lwr slopes...39-49 percent
Ridges/upr slopes....43-53 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
southwest 5 to 6 mph in the afternoon.
Ridges/upr slopes....East winds 5 mph...shifting to the west 5
to 6 mph in the afternoon.
* Mixing Height..........7000 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY NIGHT...
* Sky/Weather............Partly cloudy then becoming clear. Slight
chance of showers through the night.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...46-53
Ridges/upr slopes....43-51
* Max Humidity.......
Valleys/lwr slopes...77-92 percent
Ridges/upr slopes....77-92 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 mph in the evening...becoming
downslope/downvalley 1 to 3 mph.
Ridges/upr slopes....West winds 5 to 6 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ413-170115-
Coastal Mendocino-
1237 AM PDT Wed Sep 16 2026
.TODAY...
* Sky/Weather............Partly cloudy.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...61-69
Ridges/upr slopes....61-67
* Min Humidity.......
Valleys/lwr slopes...71-86 percent
Ridges/upr slopes....65-80 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 8 mph.
Ridges/upr slopes....West winds 5 to 10 mph.
* Mixing Height..........2000 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Mostly cloudy. Patchy fog in the evening.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...49-52
Ridges/upr slopes....47-53
* Max Humidity.......
Valleys/lwr slopes...92-100 percent
Ridges/upr slopes....88-100 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southwest winds 5 to 6 mph...shifting to
the southeast after midnight.
Ridges/upr slopes....Southeast winds 5 to 8 mph.
* Mixing Height..........700 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY...
* Sky/Weather............Mostly cloudy then becoming sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...65-73
Ridges/upr slopes....62-70
* Min Humidity.......
Valleys/lwr slopes...65-80 percent
Ridges/upr slopes....69-84 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southeast winds 5 to 6 mph...shifting to
the south 5 to 8 mph in the afternoon.
Ridges/upr slopes....South winds 5 to 7 mph.
* Mixing Height..........2800 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY NIGHT...
* Sky/Weather............Partly cloudy. Patchy fog.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...50-53
Ridges/upr slopes....47-53
* Max Humidity.......
Valleys/lwr slopes...92-100 percent
Ridges/upr slopes....87-100 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 mph in the evening...becoming
downslope/downvalley 2 to 4 mph.
Ridges/upr slopes....Variable 1 to 3 mph.
* Mixing Height..........500 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ414-170115-
Northern Interior Mendocino Including Leggett and Willits-
1237 AM PDT Wed Sep 16 2026
.TODAY...
* Sky/Weather............Sunny. Slight chance of showers and
thunderstorms late in the afternoon.
* Chance Lightning.......0% increasing to 10% in the afternoon.
* Max Temperature.......
Valleys/lwr slopes...70-78
Ridges/upr slopes....65-72
* Min Humidity.......
Valleys/lwr slopes...48-58 percent
Ridges/upr slopes....56-66 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 mph...shifting to the
southwest 5 to 6 mph in the afternoon.
Ridges/upr slopes....North winds 5 to 6 mph...shifting to the
southwest in the afternoon.
* Mixing Height..........3000 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Partly cloudy. Slight chance of showers
and thunderstorms early in the evening.
Patchy fog after midnight.
* Chance Lightning.......10% decreasing to 0% after midnight.
* Min Temperature.......
Valleys/lwr slopes...45-51
Ridges/upr slopes....46-52
* Max Humidity.......
Valleys/lwr slopes...86-100 percent
Ridges/upr slopes....77-92 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southwest winds 5 to 6 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
Ridges/upr slopes....Southwest winds 5 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....10 percent.
.THURSDAY...
* Sky/Weather............Partly cloudy then becoming sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...72-80
Ridges/upr slopes....65-73
* Min Humidity.......
Valleys/lwr slopes...47-57 percent
Ridges/upr slopes....58-68 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southeast winds 5 mph...shifting to the
southwest 5 to 6 mph in the afternoon.
Ridges/upr slopes....Southeast winds 5 mph...shifting to the
southwest 5 to 6 mph in the afternoon.
* Mixing Height..........4800 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY NIGHT...
* Sky/Weather............Mostly clear. Patchy fog in the late
evening and overnight.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...45-52
Ridges/upr slopes....46-54
* Max Humidity.......
Valleys/lwr slopes...84-99 percent
Ridges/upr slopes....77-92 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 6 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
Ridges/upr slopes....West winds 5 mph in the evening...becoming
downslope/downvalley 2 to 4 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ415-170115-
Northeastern Interior Mendocino Including Covelo-
1237 AM PDT Wed Sep 16 2026
.TODAY...
* Sky/Weather............Sunny then becoming partly cloudy. Slight
chance of showers in the late morning and
afternoon. Slight chance of thunderstorms
in the afternoon.
* Chance Lightning.......0% increasing to 10% in the afternoon.
* Max Temperature.......
Valleys/lwr slopes...74-82
Ridges/upr slopes....63-71
* Min Humidity.......
Valleys/lwr slopes...33-41 percent
Ridges/upr slopes....39-49 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
southwest 5 to 6 mph in the afternoon.
Ridges/upr slopes....Northeast winds 5 mph...shifting to the
southwest 5 to 7 mph in the afternoon.
* Mixing Height..........6500 ft AGL.
* Chc of Wetting Rain....10 percent.
.TONIGHT...
* Sky/Weather............Mostly clear. Slight chance of
thunderstorms early in the evening. Slight
chance of showers in the evening.
* Chance Lightning.......10%.
* Min Temperature.......
Valleys/lwr slopes...45-51
Ridges/upr slopes....44-50
* Max Humidity.......
Valleys/lwr slopes...80-95 percent
Ridges/upr slopes....72-87 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 6 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
Ridges/upr slopes....North winds 5 to 6 mph...shifting to the
east 5 mph after midnight.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....10 percent.
.THURSDAY...
* Sky/Weather............Sunny. Patchy fog early in the morning.
* Chance Lightning.......10%.
* Max Temperature.......
Valleys/lwr slopes...74-82
Ridges/upr slopes....63-71
* Min Humidity.......
Valleys/lwr slopes...36-43 percent
Ridges/upr slopes....42-52 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
southwest 5 to 6 mph in the afternoon.
Ridges/upr slopes....Variable 2 to 4 mph...becoming southwest 5
to 6 mph in the afternoon.
* Mixing Height..........7100 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY NIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...45-53
Ridges/upr slopes....48-54
* Max Humidity.......
Valleys/lwr slopes...77-92 percent
Ridges/upr slopes....67-81 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 mph in the evening...becoming
downslope/downvalley 2 to 4 mph.
Ridges/upr slopes....West winds 5 to 6 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ416-170115-
Southeastern Interior Mendocino Including Ukiah and Potter Valley-
1237 AM PDT Wed Sep 16 2026
.TODAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...73-81
Ridges/upr slopes....67-75
* Min Humidity.......
Valleys/lwr slopes...40-50 percent
Ridges/upr slopes....45-55 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
west 5 to 7 mph in the afternoon.
Ridges/upr slopes....West winds 5 to 8 mph.
* Mixing Height..........4200 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Partly cloudy. Patchy fog early in the
morning.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...47-54
Ridges/upr slopes....50-56
* Max Humidity.......
Valleys/lwr slopes...81-96 percent
Ridges/upr slopes....74-88 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 6 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
Ridges/upr slopes....Southwest winds 5 to 7 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY...
* Sky/Weather............Partly cloudy then becoming sunny. Patchy
fog early in the morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...75-83
Ridges/upr slopes....68-76
* Min Humidity.......
Valleys/lwr slopes...37-47 percent
Ridges/upr slopes....43-53 percent
* 20-Foot Winds...
Valleys/lwr slopes...South winds 5 to 7 mph.
Ridges/upr slopes....South winds 5 to 7 mph.
* Mixing Height..........5300 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY NIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...48-55
Ridges/upr slopes....52-57
* Max Humidity.......
Valleys/lwr slopes...79-94 percent
Ridges/upr slopes....70-85 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 6 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
Ridges/upr slopes....West winds 5 to 6 mph...shifting to the
north 5 mph after midnight.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ417-170115-
Southwestern Interior Mendocino Including Boonville-
1237 AM PDT Wed Sep 16 2026
.TODAY...
* Sky/Weather............Partly cloudy then becoming sunny. Patchy
fog early in the morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...67-75
Ridges/upr slopes....65-73
* Min Humidity.......
Valleys/lwr slopes...59-69 percent
Ridges/upr slopes....62-72 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 8 mph.
Ridges/upr slopes....West winds 5 to 8 mph.
* Mixing Height..........2100 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Partly cloudy then becoming mostly cloudy.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...49-54
Ridges/upr slopes....50-54
* Max Humidity.......
Valleys/lwr slopes...82-97 percent
Ridges/upr slopes....79-94 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 6 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
Ridges/upr slopes....West winds 5 to 6 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
* Mixing Height..........300 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY...
* Sky/Weather............Mostly cloudy then becoming partly cloudy
then becoming sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...71-78
Ridges/upr slopes....69-75
* Min Humidity.......
Valleys/lwr slopes...52-62 percent
Ridges/upr slopes....55-65 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southeast winds 5 to 6 mph...shifting to
the south 5 to 7 mph in the afternoon.
Ridges/upr slopes....Southeast winds 5 to 6 mph...shifting to
the south 5 to 7 mph in the afternoon.
* Mixing Height..........3500 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY NIGHT...
* Sky/Weather............Mostly clear. Patchy fog in the late
evening and overnight.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...49-55
Ridges/upr slopes....50-55
* Max Humidity.......
Valleys/lwr slopes...81-96 percent
Ridges/upr slopes....79-94 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 6 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
Ridges/upr slopes....West winds 5 mph in the evening...becoming
downslope/downvalley 2 to 4 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ418-170115-
Northern Lake Including Gravelly Valley-
1237 AM PDT Wed Sep 16 2026
.TODAY...
* Sky/Weather............Sunny. Slight chance of showers in the
afternoon.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...78-82
Ridges/upr slopes....64-72
* Min Humidity.......
Valleys/lwr slopes...31-39 percent
Ridges/upr slopes....40-50 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
southwest 5 to 6 mph in the afternoon.
Ridges/upr slopes....Northeast winds 5 mph...shifting to the
south 5 to 6 mph in the afternoon.
* Mixing Height..........6100 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Mostly clear. Slight chance of showers in
the evening.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...44-51
Ridges/upr slopes....45-51
* Max Humidity.......
Valleys/lwr slopes...83-98 percent
Ridges/upr slopes....72-87 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 6 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
Ridges/upr slopes....North winds 5 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....10 percent.
.THURSDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...77-82
Ridges/upr slopes....64-72
* Min Humidity.......
Valleys/lwr slopes...32-40 percent
Ridges/upr slopes....46-56 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
south 5 mph in the afternoon.
Ridges/upr slopes....Northeast winds 5 mph...shifting to the
south 5 to 6 mph in the afternoon.
* Mixing Height..........5600 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY NIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...47-55
Ridges/upr slopes....48-56
* Max Humidity.......
Valleys/lwr slopes...71-86 percent
Ridges/upr slopes....63-78 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 mph in the evening...becoming
downslope/downvalley 2 to 4 mph.
Ridges/upr slopes....West winds 5 mph in the evening...becoming
downslope/downvalley 2 to 4 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ419-170115-
Eastern Lake Including Clearlake and Middletown-
1237 AM PDT Wed Sep 16 2026
.TODAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...78-82
Ridges/upr slopes....71-76
* Min Humidity.......
Valleys/lwr slopes...33-43 percent
Ridges/upr slopes....42-52 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
south 5 to 7 mph in the afternoon.
Ridges/upr slopes....Variable 2 to 4 mph...becoming south 5 to
6 mph in the afternoon.
* Mixing Height..........6100 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Mostly clear. Patchy fog early in the
morning.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...46-52
Ridges/upr slopes....46-51
* Max Humidity.......
Valleys/lwr slopes...85-100 percent
Ridges/upr slopes....85-100 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southwest winds 5 to 7 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
Ridges/upr slopes....Southwest winds 5 to 6 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
* Mixing Height..........300 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY...
* Sky/Weather............Partly cloudy then becoming mostly cloudy
then becoming sunny. Patchy fog early in
the morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...around 80
Ridges/upr slopes....69-74
* Min Humidity.......
Valleys/lwr slopes...31-40 percent
Ridges/upr slopes....40-50 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
east 5 mph in the afternoon.
Ridges/upr slopes....North winds 5 to 6 mph in the
morning...becoming upslope/upvalley 2 to 4
mph.
* Mixing Height..........5300 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY NIGHT...
* Sky/Weather............Clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...48-56
Ridges/upr slopes....52-58
* Max Humidity.......
Valleys/lwr slopes...74-89 percent
Ridges/upr slopes....65-80 percent
* 20-Foot Winds...
Valleys/lwr slopes...Downslope/downvalley 1 to 3 mph.
Ridges/upr slopes....Variable 1 to 3 mph.
* Mixing Height..........300 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ420-170115-
Southern Lake Including Cobb and Konocti-
1237 AM PDT Wed Sep 16 2026
.TODAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...76-79
Ridges/upr slopes....67-74
* Min Humidity.......
Valleys/lwr slopes...38-48 percent
Ridges/upr slopes....44-54 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southwest winds 5 to 9 mph.
Ridges/upr slopes....Southwest winds 5 to 9 mph.
* Mixing Height..........4600 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...47-53
Ridges/upr slopes....50-54
* Max Humidity.......
Valleys/lwr slopes...82-97 percent
Ridges/upr slopes....79-94 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southwest winds 5 to 9 mph in the
evening...becoming downslope/downvalley 2
to 5 mph.
Ridges/upr slopes....Southwest winds 5 to 7 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY...
* Sky/Weather............Partly cloudy then becoming sunny. Patchy
fog early in the morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...76-79
Ridges/upr slopes....67-74
* Min Humidity.......
Valleys/lwr slopes...39-49 percent
Ridges/upr slopes....47-57 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southeast winds 5 mph.
Ridges/upr slopes....Southeast winds 5 mph.
* Mixing Height..........4500 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY NIGHT...
* Sky/Weather............Clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...50-58
Ridges/upr slopes....55-58
* Max Humidity.......
Valleys/lwr slopes...72-82 percent
Ridges/upr slopes....71-86 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southwest winds 5 to 6 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
Ridges/upr slopes....Southwest winds 5 mph...shifting to the
northwest after midnight.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ421-170115-
Western Lake Including Lakeport-
1237 AM PDT Wed Sep 16 2026
.TODAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...75-80
Ridges/upr slopes....70-73
* Min Humidity.......
Valleys/lwr slopes...35-45 percent
Ridges/upr slopes....38-46 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
southwest 5 to 6 mph in the afternoon.
Ridges/upr slopes....West winds 5 to 7 mph.
* Mixing Height..........6200 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Mostly clear. Patchy fog early in the
morning.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...48-53
Ridges/upr slopes....50-55
* Max Humidity.......
Valleys/lwr slopes...85-100 percent
Ridges/upr slopes....74-89 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 6 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
Ridges/upr slopes....West winds 5 to 6 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
* Mixing Height..........300 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY...
* Sky/Weather............Partly cloudy then becoming sunny. Patchy
fog early in the morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...75-79
Ridges/upr slopes....71-74
* Min Humidity.......
Valleys/lwr slopes...35-45 percent
Ridges/upr slopes....41-48 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
southeast 5 mph in the afternoon.
Ridges/upr slopes....Southeast winds 5 to 7 mph.
* Mixing Height..........5500 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY NIGHT...
* Sky/Weather............Clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...50-55
Ridges/upr slopes....52-59
* Max Humidity.......
Valleys/lwr slopes...72-87 percent
Ridges/upr slopes....68-78 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 mph in the evening...becoming
downslope/downvalley 2 to 4 mph.
Ridges/upr slopes....West winds 5 to 7 mph...shifting to the
north 5 mph after midnight.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
.EXTENDED FORECAST FOR DAYS 3 THROUGH 5...
...Northwest California Coast...
.FRIDAY...Partly cloudy. Patchy fog after midnight. Lows near 50.
Highs 64 to 69. North winds 5 mph.
.SATURDAY...Mostly cloudy. Patchy fog in the morning. Patchy fog
after midnight. Lows in the lower 50s. Highs 64 to 69. North
winds 5 mph.
.SUNDAY...Mostly cloudy. Patchy fog in the morning. Patchy fog
after midnight. Lows in the lower to mid 50s. Highs 63 to 69.
Northwest winds 5 mph.
...Northwest California Interior...
.FRIDAY...Clear. Lows 52 to 60. Highs 78 to 88. Northwest winds
5 mph.
.SATURDAY...Mostly clear. Lows 53 to 61. Highs 82 to 92. Winds
generally less than 5 mph.
.SUNDAY...Mostly clear. Lows 53 to 61. Highs 80 to 91. Winds
generally less than 5 mph.
.6 to 10 DAY OUTLOOK...Monday September 21 THROUGH Friday September 25, 2026...
FOR NW CALIF...ABOVE NORMAL TEMPERATURES AND ABOVE NORMAL PRECIPITATION.
$$
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