Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Eureka, CA
Issued by NWS Eureka, CA
082
FNUS56 KEKA 212104
FWFEKA
FIRE WEATHER PLANNING FORECAST FOR NORTHWEST CALIFORNIA
NATIONAL WEATHER SERVICE Eureka CA
204 PM PDT Fri Aug 21 2026
.DISCUSSION...Marine influence has will continue to increase
through the end of the weekend. High clouds will aid in the
warmest interior temperatures pulling back closer to 90 with
RH closer to 25 percent. Mid and upper slope recoveries will
also improve though remain poor on higher peaks. Warmer, near
average conditions will return Sunday and into early next week.
CAZ401-221330-
Coastal Del Norte-
204 PM PDT Fri Aug 21 2026
.TONIGHT...
* Sky/Weather............Mostly cloudy. Patchy fog in the late
evening and overnight.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...50-53
Ridges/upr slopes....47-52
* Max Humidity.......
Valleys/lwr slopes...93-100 percent
Ridges/upr slopes....93-100 percent
* 20-Foot Winds...
Valleys/lwr slopes...Light winds 1 to 3 mph.
Ridges/upr slopes....Southwest winds 5 mph in the
evening...becoming light winds 2 to 4 mph.
* Mixing Height..........800 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY...
* Sky/Weather............Mostly cloudy then becoming partly cloudy.
Patchy fog in the morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...61-66
Ridges/upr slopes....60-67
* Min Humidity.......
Valleys/lwr slopes...77-90 percent
Ridges/upr slopes....76-86 percent
* 20-Foot Winds...
Valleys/lwr slopes...Light winds 2 to 4 mph...becoming west 5
to 6 mph in the afternoon.
Ridges/upr slopes....Variable 2 to 4 mph...becoming west 5 to 6
mph in the afternoon.
* Mixing Height..........2200 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY 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...50-53
Ridges/upr slopes....47-52
* Max Humidity.......
Valleys/lwr slopes...94-100 percent
Ridges/upr slopes....93-100 percent
* 20-Foot Winds...
Valleys/lwr slopes...Light winds 1 to 3 mph.
Ridges/upr slopes....Northwest winds 5 mph in the
evening...becoming light winds 2 to 4 mph.
* Mixing Height..........600 ft AGL.
* Chc of Wetting Rain....0 percent.
.SUNDAY...
* Sky/Weather............Mostly cloudy then becoming partly cloudy
then becoming sunny. Patchy fog early in
the morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...64-72
Ridges/upr slopes....65-72
* Min Humidity.......
Valleys/lwr slopes...65-80 percent
Ridges/upr slopes....68-78 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 5 mph...becoming
northwest 5 to 8 mph in the afternoon.
Ridges/upr slopes....Variable 2 to 4 mph...becoming west 5 to 7
mph in the afternoon.
* Mixing Height..........1700 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ402-221330-
Interior Del Norte Including the Smith River Valley-
204 PM PDT Fri Aug 21 2026
.TONIGHT...
* Sky/Weather............Partly cloudy. Patchy fog after midnight.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...46-51
Ridges/upr slopes....49-53
* Max Humidity.......
Valleys/lwr slopes...86-100 percent
Ridges/upr slopes....69-84 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 7 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY...
* Sky/Weather............Partly cloudy then becoming sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...66-74
Ridges/upr slopes....62-70
* Min Humidity.......
Valleys/lwr slopes...68-83 percent
Ridges/upr slopes....67-82 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southwest winds 5 to 8 mph.
Ridges/upr slopes....Southwest winds 5 to 8 mph.
* Mixing Height..........2700 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY NIGHT...
* Sky/Weather............Mostly clear. Patchy fog late in the
evening.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...47-51
Ridges/upr slopes....49-53
* Max Humidity.......
Valleys/lwr slopes...86-100 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....West winds 5 to 6 mph...shifting to the
northeast 5 mph after midnight.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.SUNDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...75-83
Ridges/upr slopes....71-79
* Min Humidity.......
Valleys/lwr slopes...61-71 percent
Ridges/upr slopes....53-63 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northeast winds 5 to 6 mph...shifting to
the northwest in the afternoon.
Ridges/upr slopes....Northeast winds 5 to 6 mph...shifting to
the northwest in the afternoon.
* Mixing Height..........4800 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ403-221330-
Northeastern Interior Humboldt and Southwestern Siskiyou
Including Orleans-
204 PM PDT Fri Aug 21 2026
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...52-56
Ridges/upr slopes....51-54
* Max Humidity.......
Valleys/lwr slopes...73-88 percent
Ridges/upr slopes....53-68 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southwest winds 5 to 9 mph.
Ridges/upr slopes....Southwest winds 5 to 9 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...81-89
Ridges/upr slopes....68-76
* Min Humidity.......
Valleys/lwr slopes...27-35 percent
Ridges/upr slopes....35-45 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southwest winds 5 to 8 mph.
Ridges/upr slopes....Southwest winds 5 to 9 mph.
* Mixing Height..........5100 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY NIGHT...
* Sky/Weather............Clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...52-55
Ridges/upr slopes....51-54
* Max Humidity.......
Valleys/lwr slopes...67-82 percent
Ridges/upr slopes....55-65 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....West winds 5 to 8 mph...shifting to the
northeast 5 mph after midnight.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
.SUNDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...90-98
Ridges/upr slopes....76-84
* Min Humidity.......
Valleys/lwr slopes...17-25 percent
Ridges/upr slopes....25-33 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
west 5 mph in the afternoon.
Ridges/upr slopes....Northeast winds 5 to 6 mph...shifting to
the northwest in the afternoon.
* Mixing Height..........7700 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ404-221330-
Northern Coastal Humboldt-
204 PM PDT Fri Aug 21 2026
.TONIGHT...
* Sky/Weather............Mostly cloudy. Patchy fog.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...51-54
Ridges/upr slopes....around 51
* Max Humidity.......
Valleys/lwr slopes...93-100 percent
Ridges/upr slopes....95 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 6 mph in the
evening...becoming light winds 2 to 4 mph.
Ridges/upr slopes....Variable 1 to 3 mph.
* Mixing Height..........700 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY...
* Sky/Weather............Mostly cloudy then becoming partly cloudy.
Patchy fog in the morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...62-67
Ridges/upr slopes....around 62
* Min Humidity.......
Valleys/lwr slopes...72-87 percent
Ridges/upr slopes....80 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 8 mph.
Ridges/upr slopes....Variable 2 to 4 mph...becoming northwest 5
to 7 mph in the afternoon.
* Mixing Height..........2200 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY NIGHT...
* Sky/Weather............Partly cloudy then becoming mostly cloudy.
Patchy fog early in the morning.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...52-55
Ridges/upr slopes....around 52
* Max Humidity.......
Valleys/lwr slopes...94-100 percent
Ridges/upr slopes....95 percent
* 20-Foot Winds...
Valleys/lwr slopes...North winds 5 to 8 mph.
Ridges/upr slopes....North winds 5 to 8 mph.
* Mixing Height..........700 ft AGL.
* Chc of Wetting Rain....0 percent.
.SUNDAY...
* Sky/Weather............Mostly cloudy then becoming partly cloudy.
Patchy fog early in the morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...63-69
Ridges/upr slopes....around 62
* Min Humidity.......
Valleys/lwr slopes...73-88 percent
Ridges/upr slopes....81 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 8 mph.
Ridges/upr slopes....Northwest winds 5 to 8 mph.
* Mixing Height..........1600 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ405-221330-
Northwestern Interior Humboldt Including the Bald Hills-
204 PM PDT Fri Aug 21 2026
.TONIGHT...
* Sky/Weather............Partly cloudy then becoming mostly cloudy.
Patchy fog in the late evening and
overnight.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...49-52
Ridges/upr slopes....49-54
* Max Humidity.......
Valleys/lwr slopes...83-98 percent
Ridges/upr slopes....71-86 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 6 mph in the
evening...becoming light winds 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.
.SATURDAY...
* Sky/Weather............Partly cloudy then becoming sunny. Patchy
fog in the morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...67-75
Ridges/upr slopes....64-71
* Min Humidity.......
Valleys/lwr slopes...66-81 percent
Ridges/upr slopes....66-76 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 8 mph.
Ridges/upr slopes....West winds 5 to 8 mph.
* Mixing Height..........2400 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY NIGHT...
* Sky/Weather............Partly cloudy.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...49-53
Ridges/upr slopes....50-53
* Max Humidity.......
Valleys/lwr slopes...84-99 percent
Ridges/upr slopes....71-86 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
Ridges/upr slopes....Northwest winds 5 to 6 mph...shifting to
the northeast 5 mph after midnight.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.SUNDAY...
* Sky/Weather............Partly cloudy then becoming sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...73-81
Ridges/upr slopes....70-78
* Min Humidity.......
Valleys/lwr slopes...64-74 percent
Ridges/upr slopes....59-69 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 mph...shifting to the
west 5 to 6 mph in the afternoon.
* Mixing Height..........2500 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ406-221330-
Eastern Interior Humboldt Including Willow Creek and Hoopa-
204 PM PDT Fri Aug 21 2026
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...51-54
Ridges/upr slopes....52-55
* Max Humidity.......
Valleys/lwr slopes...79-94 percent
Ridges/upr slopes....55-70 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....Southwest winds 5 to 9 mph in the
evening...becoming downslope/downvalley 2
to 5 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...79-87
Ridges/upr slopes....66-74
* Min Humidity.......
Valleys/lwr slopes...38-48 percent
Ridges/upr slopes....42-52 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 8 mph.
Ridges/upr slopes....Northwest winds 5 to 8 mph.
* Mixing Height..........4000 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY NIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...51-54
Ridges/upr slopes....52-55
* Max Humidity.......
Valleys/lwr slopes...73-88 percent
Ridges/upr slopes....54-69 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....Northwest winds 5 to 6 mph...shifting to
the northeast 5 mph after midnight.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.SUNDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...87-95
Ridges/upr slopes....73-81
* Min Humidity.......
Valleys/lwr slopes...27-35 percent
Ridges/upr slopes....31-39 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
northwest 5 to 6 mph in the afternoon.
Ridges/upr slopes....Northeast winds 5 to 6 mph...shifting to
the west in the afternoon.
* Mixing Height..........5200 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ407-221330-
Southwestern Humboldt Including the King Range and the Eel River
Valley-
204 PM PDT Fri Aug 21 2026
.TONIGHT...
* Sky/Weather............Partly cloudy. Patchy fog late in the
night.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...50-53
Ridges/upr slopes....50-54
* Max Humidity.......
Valleys/lwr slopes...85-100 percent
Ridges/upr slopes....76-91 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 7 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
Ridges/upr slopes....North winds 5 to 7 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY...
* Sky/Weather............Partly cloudy then becoming sunny. Patchy
fog early in the morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...74-82
Ridges/upr slopes....66-74
* Min Humidity.......
Valleys/lwr slopes...53-63 percent
Ridges/upr slopes....64-74 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 8 mph.
Ridges/upr slopes....Northwest winds 5 to 8 mph.
* Mixing Height..........2800 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY NIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...51-55
Ridges/upr slopes....53-57
* Max Humidity.......
Valleys/lwr slopes...83-98 percent
Ridges/upr slopes....71-86 percent
* 20-Foot Winds...
Valleys/lwr slopes...North winds 5 to 10 mph.
Ridges/upr slopes....North winds 5 to 11 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.SUNDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...79-87
Ridges/upr slopes....70-78
* Min Humidity.......
Valleys/lwr slopes...48-58 percent
Ridges/upr slopes....63-73 percent
* 20-Foot Winds...
Valleys/lwr slopes...North winds 5 to 10 mph.
Ridges/upr slopes....North winds 5 to 10 mph.
* Mixing Height..........2800 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ408-221330-
Southeastern Interior Humboldt Including Kneeland and Alderpoint-
204 PM PDT Fri Aug 21 2026
.TONIGHT...
* Sky/Weather............Partly cloudy. Patchy fog after midnight.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...49-54
Ridges/upr slopes....47-54
* Max Humidity.......
Valleys/lwr slopes...88-100 percent
Ridges/upr slopes....71-86 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....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.
.SATURDAY...
* Sky/Weather............Partly cloudy then becoming sunny. Patchy
fog early in the morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...71-79
Ridges/upr slopes....64-72
* Min Humidity.......
Valleys/lwr slopes...63-73 percent
Ridges/upr slopes....70-80 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 8 mph.
Ridges/upr slopes....Northwest winds 5 to 8 mph.
* Mixing Height..........3400 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY NIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...49-54
Ridges/upr slopes....47-54
* Max Humidity.......
Valleys/lwr slopes...85-100 percent
Ridges/upr slopes....71-86 percent
* 20-Foot Winds...
Valleys/lwr slopes...North winds 5 to 8 mph.
Ridges/upr slopes....North winds 5 to 8 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.SUNDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...76-84
Ridges/upr slopes....69-77
* Min Humidity.......
Valleys/lwr slopes...56-66 percent
Ridges/upr slopes....66-76 percent
* 20-Foot Winds...
Valleys/lwr slopes...North winds 5 mph...shifting to the west 5
to 6 mph in the afternoon.
Ridges/upr slopes....Northeast winds 5 mph...shifting to the
west 5 to 6 mph in the afternoon.
* Mixing Height..........4500 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ409-221330-
Northwestern Trinity Including Salyer and Big Bar-
204 PM PDT Fri Aug 21 2026
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...51-55
Ridges/upr slopes....52-56
* Max Humidity.......
Valleys/lwr slopes...72-87 percent
Ridges/upr slopes....51-61 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 8 mph in the
evening...becoming downslope/downvalley 2
to 5 mph.
Ridges/upr slopes....Southwest winds 5 to 8 mph in the
evening...becoming downslope/downvalley 2
to 5 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...81-89
Ridges/upr slopes....69-77
* Min Humidity.......
Valleys/lwr slopes...27-35 percent
Ridges/upr slopes....27-35 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 8 mph.
Ridges/upr slopes....West winds 5 to 8 mph.
* Mixing Height..........6500 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY NIGHT...
* Sky/Weather............Clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...50-54
Ridges/upr slopes....51-56
* Max Humidity.......
Valleys/lwr slopes...65-80 percent
Ridges/upr slopes....47-57 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 7 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
Ridges/upr slopes....Northwest winds 5 to 7 mph...shifting to
the north 5 to 6 mph after midnight.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.SUNDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...89-97
Ridges/upr slopes....76-84
* Min Humidity.......
Valleys/lwr slopes...17-25 percent
Ridges/upr slopes....18-26 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
northwest 5 to 6 mph in the afternoon.
Ridges/upr slopes....Northeast winds 5 mph...shifting to the
southwest 5 to 6 mph in the afternoon.
* Mixing Height..........7400 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ410-221330-
Northeastern Trinity Including Trinity Lake-
204 PM PDT Fri Aug 21 2026
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...55-58
Ridges/upr slopes....49-56
* Max Humidity.......
Valleys/lwr slopes...54-69 percent
Ridges/upr slopes....48-58 percent
* 20-Foot Winds...
Valleys/lwr slopes...South winds 5 to 8 mph.
Ridges/upr slopes....South winds 5 to 8 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...83-91
Ridges/upr slopes....70-78
* Min Humidity.......
Valleys/lwr slopes...16-21 percent
Ridges/upr slopes....20-28 percent
* 20-Foot Winds...
Valleys/lwr slopes...South winds 5 to 8 mph.
Ridges/upr slopes....South winds 5 to 8 mph.
* Mixing Height..........8200 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY NIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...55-58
Ridges/upr slopes....49-57
* Max Humidity.......
Valleys/lwr slopes...53-63 percent
Ridges/upr slopes....44-54 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southwest winds 5 to 6 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
Ridges/upr slopes....Northwest winds 5 to 8 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.SUNDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...87-95
Ridges/upr slopes....73-81
* Min Humidity.......
Valleys/lwr slopes...12-17 percent
Ridges/upr slopes....15-23 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
southeast 5 to 6 mph in the afternoon.
Ridges/upr slopes....Variable 2 to 4 mph...becoming southeast 5
to 6 mph in the afternoon.
* Mixing Height..........8200 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ411-221330-
Eastern Trinity Including Weaverville and Hayfork-
204 PM PDT Fri Aug 21 2026
.TONIGHT...
* Sky/Weather............Clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...49-57
Ridges/upr slopes....50-56
* Max Humidity.......
Valleys/lwr slopes...61-76 percent
Ridges/upr slopes....54-64 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 8 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...85-92
Ridges/upr slopes....74-82
* Min Humidity.......
Valleys/lwr slopes...16-23 percent
Ridges/upr slopes....21-29 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....West winds 5 to 8 mph.
* Mixing Height..........7600 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY NIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...49-57
Ridges/upr slopes....51-56
* Max Humidity.......
Valleys/lwr slopes...57-72 percent
Ridges/upr slopes....54-64 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 8 mph in the
evening...becoming downslope/downvalley 2
to 5 mph.
Ridges/upr slopes....Northwest winds 5 to 8 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.SUNDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...90-97
Ridges/upr slopes....79-87
* Min Humidity.......
Valleys/lwr slopes...12-17 percent
Ridges/upr slopes....14-22 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 1 to 3 mph.
Ridges/upr slopes....Variable 2 to 4 mph...becoming east 5 to 6
mph in the afternoon.
* Mixing Height..........8500 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ412-221330-
Southern Trinity Including Ruth Lake and the Yolla Bollys-
204 PM PDT Fri Aug 21 2026
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...48-52
Ridges/upr slopes....47-55
* Max Humidity.......
Valleys/lwr slopes...75-90 percent
Ridges/upr slopes....63-78 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 7 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
Ridges/upr slopes....Southwest winds 5 to 8 mph in the
evening...becoming downslope/downvalley 2
to 5 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...79-87
Ridges/upr slopes....71-79
* Min Humidity.......
Valleys/lwr slopes...32-40 percent
Ridges/upr slopes....30-38 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 8 mph.
Ridges/upr slopes....West winds 5 to 8 mph.
* Mixing Height..........6000 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY NIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...50-54
Ridges/upr slopes....48-56
* Max Humidity.......
Valleys/lwr slopes...71-86 percent
Ridges/upr slopes....62-77 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 7 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
Ridges/upr slopes....Northwest winds 5 to 6 mph...shifting to
the northeast after midnight.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.SUNDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...85-93
Ridges/upr slopes....77-85
* Min Humidity.......
Valleys/lwr slopes...23-31 percent
Ridges/upr slopes....21-29 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 southwest in the afternoon.
* Mixing Height..........7400 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ413-221330-
Coastal Mendocino-
204 PM PDT Fri Aug 21 2026
.TONIGHT...
* Sky/Weather............Partly cloudy then becoming mostly cloudy.
Patchy fog late in the night.
* 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....86-100 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 10 mph.
Ridges/upr slopes....North winds 5 to 10 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY...
* Sky/Weather............Mostly cloudy then becoming partly cloudy
then becoming sunny. Patchy fog early in
the morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...62-70
Ridges/upr slopes....65-73
* Min Humidity.......
Valleys/lwr slopes...74-89 percent
Ridges/upr slopes....65-80 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 10 mph.
Ridges/upr slopes....Northwest winds 5 to 12 mph.
* Mixing Height..........1500 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY 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...50-53
Ridges/upr slopes....48-55
* Max Humidity.......
Valleys/lwr slopes...90-100 percent
Ridges/upr slopes....82-97 percent
* 20-Foot Winds...
Valleys/lwr slopes...North winds 5 to 10 mph.
Ridges/upr slopes....North winds 5 to 10 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.SUNDAY...
* Sky/Weather............Mostly cloudy then becoming partly cloudy
then becoming sunny. Patchy fog in the
morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...67-75
Ridges/upr slopes....70-78
* Min Humidity.......
Valleys/lwr slopes...66-81 percent
Ridges/upr slopes....60-70 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 8 mph.
Ridges/upr slopes....North winds 5 to 6 mph...shifting to the
west 5 to 7 mph in the afternoon.
* Mixing Height..........1200 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ414-221330-
Northern Interior Mendocino Including Leggett and Willits-
204 PM PDT Fri Aug 21 2026
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...46-53
Ridges/upr slopes....48-56
* Max Humidity.......
Valleys/lwr slopes...82-97 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....Northwest winds 5 to 8 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...79-87
Ridges/upr slopes....72-80
* Min Humidity.......
Valleys/lwr slopes...39-49 percent
Ridges/upr slopes....45-55 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 8 mph.
Ridges/upr slopes....Northwest winds 5 to 8 mph.
* Mixing Height..........3800 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY NIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...48-55
Ridges/upr slopes....49-57
* Max Humidity.......
Valleys/lwr slopes...76-91 percent
Ridges/upr slopes....69-84 percent
* 20-Foot Winds...
Valleys/lwr slopes...North winds 5 to 7 mph.
Ridges/upr slopes....Northwest winds 5 to 7 mph...shifting to
the north 5 to 6 mph after midnight.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.SUNDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...85-93
Ridges/upr slopes....79-87
* Min Humidity.......
Valleys/lwr slopes...29-37 percent
Ridges/upr slopes....35-43 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 to 6 mph...shifting to
the southwest in the afternoon.
* Mixing Height..........5900 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ415-221330-
Northeastern Interior Mendocino Including Covelo-
204 PM PDT Fri Aug 21 2026
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...48-56
Ridges/upr slopes....52-57
* Max Humidity.......
Valleys/lwr slopes...65-80 percent
Ridges/upr slopes....54-64 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 7 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
Ridges/upr slopes....West winds 5 to 8 mph in the
evening...becoming downslope/downvalley 2
to 5 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...83-91
Ridges/upr slopes....72-80
* Min Humidity.......
Valleys/lwr slopes...24-30 percent
Ridges/upr slopes....26-34 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 7 mph.
Ridges/upr slopes....West winds 5 to 8 mph.
* Mixing Height..........6400 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY NIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...51-59
Ridges/upr slopes....54-60
* Max Humidity.......
Valleys/lwr slopes...62-77 percent
Ridges/upr slopes....54-64 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 8 mph in the
evening...becoming downslope/downvalley 2
to 5 mph.
Ridges/upr slopes....Northwest winds 5 to 8 mph...shifting to
the northeast 5 mph after midnight.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.SUNDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...88-96
Ridges/upr slopes....77-85
* Min Humidity.......
Valleys/lwr slopes...18-23 percent
Ridges/upr slopes....19-27 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 6 mph in the afternoon.
* Mixing Height..........7600 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ416-221330-
Southeastern Interior Mendocino Including Ukiah and Potter Valley-
204 PM PDT Fri Aug 21 2026
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...49-55
Ridges/upr slopes....53-59
* Max Humidity.......
Valleys/lwr slopes...74-89 percent
Ridges/upr slopes....60-75 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 9 mph.
Ridges/upr slopes....Northwest winds 5 to 9 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...80-88
Ridges/upr slopes....76-82
* Min Humidity.......
Valleys/lwr slopes...33-43 percent
Ridges/upr slopes....34-44 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 9 mph.
Ridges/upr slopes....Northwest winds 5 to 9 mph.
* Mixing Height..........4200 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY NIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...51-58
Ridges/upr slopes....55-62
* Max Humidity.......
Valleys/lwr slopes...70-85 percent
Ridges/upr slopes....58-73 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 9 mph.
Ridges/upr slopes....Northwest winds 5 to 9 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.SUNDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...87-95
Ridges/upr slopes....80-88
* Min Humidity.......
Valleys/lwr slopes...22-30 percent
Ridges/upr slopes....26-34 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
south 5 to 6 mph in the afternoon.
Ridges/upr slopes....Northeast winds 5 mph...shifting to the
south 5 to 6 mph in the afternoon.
* Mixing Height..........7200 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ417-221330-
Southwestern Interior Mendocino Including Boonville-
204 PM PDT Fri Aug 21 2026
.TONIGHT...
* Sky/Weather............Partly cloudy.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...49-54
Ridges/upr slopes....49-55
* Max Humidity.......
Valleys/lwr slopes...83-98 percent
Ridges/upr slopes....76-91 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 8 mph.
Ridges/upr slopes....Northwest winds 5 to 9 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY...
* Sky/Weather............Partly cloudy then becoming sunny. Patchy
fog early in the morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...74-82
Ridges/upr slopes....71-79
* Min Humidity.......
Valleys/lwr slopes...52-62 percent
Ridges/upr slopes....54-64 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 9 mph.
Ridges/upr slopes....Northwest winds 5 to 9 mph.
* Mixing Height..........2100 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY NIGHT...
* Sky/Weather............Partly cloudy. Patchy fog early in the
morning.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...51-56
Ridges/upr slopes....51-57
* Max Humidity.......
Valleys/lwr slopes...78-93 percent
Ridges/upr slopes....72-87 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 9 mph.
Ridges/upr slopes....Northwest winds 5 to 9 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.SUNDAY...
* Sky/Weather............Partly cloudy then becoming sunny. Patchy
fog early in the morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...80-88
Ridges/upr slopes....77-85
* Min Humidity.......
Valleys/lwr slopes...43-53 percent
Ridges/upr slopes....42-52 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....North winds 5 mph...shifting to the
southwest 5 to 6 mph in the afternoon.
* Mixing Height..........4200 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ418-221330-
Northern Lake Including Gravelly Valley-
204 PM PDT Fri Aug 21 2026
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...51-59
Ridges/upr slopes....55-61
* Max Humidity.......
Valleys/lwr slopes...55-65 percent
Ridges/upr slopes....41-51 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 8 mph.
Ridges/upr slopes....West winds 5 to 8 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...87-93
Ridges/upr slopes....75-83
* Min Humidity.......
Valleys/lwr slopes...22-30 percent
Ridges/upr slopes....23-31 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 8 mph.
Ridges/upr slopes....West winds 5 to 8 mph.
* Mixing Height..........6400 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY NIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...53-61
Ridges/upr slopes....56-63
* Max Humidity.......
Valleys/lwr slopes...54-69 percent
Ridges/upr slopes....46-56 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 7 mph...shifting to the
north 5 mph after midnight.
Ridges/upr slopes....Northwest winds 5 to 7 mph...shifting to
the north 5 to 6 mph after midnight.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.SUNDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...93-98
Ridges/upr slopes....79-87
* Min Humidity.......
Valleys/lwr slopes...15-21 percent
Ridges/upr slopes....19-26 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northeast winds 5 mph...shifting to the
south 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..........7200 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ419-221330-
Eastern Lake Including Clearlake and Middletown-
204 PM PDT Fri Aug 21 2026
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...52-59
Ridges/upr slopes....55-63
* Max Humidity.......
Valleys/lwr slopes...61-76 percent
Ridges/upr slopes....53-63 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 9 mph.
Ridges/upr slopes....West winds 5 to 9 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...88-93
Ridges/upr slopes....83-88
* Min Humidity.......
Valleys/lwr slopes...20-25 percent
Ridges/upr slopes....20-28 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 7 mph.
Ridges/upr slopes....West winds 5 to 8 mph.
* Mixing Height..........6900 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY NIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...53-60
Ridges/upr slopes....57-65
* Max Humidity.......
Valleys/lwr slopes...60-75 percent
Ridges/upr slopes....53-63 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 9 mph.
Ridges/upr slopes....Northwest winds 5 to 9 mph.
* Mixing Height..........300 ft AGL.
* Chc of Wetting Rain....0 percent.
.SUNDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...91-95
Ridges/upr slopes....85-90
* Min Humidity.......
Valleys/lwr slopes...17-25 percent
Ridges/upr slopes....17-24 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
southeast 5 to 6 mph in the afternoon.
Ridges/upr slopes....North winds 5 to 6 mph...shifting to the
southeast 5 to 7 mph in the afternoon.
* Mixing Height..........7200 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ420-221330-
Southern Lake Including Cobb and Konocti-
204 PM PDT Fri Aug 21 2026
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...53-59
Ridges/upr slopes....59-63
* Max Humidity.......
Valleys/lwr slopes...56-69 percent
Ridges/upr slopes....50-60 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 9 mph.
Ridges/upr slopes....West winds 5 to 9 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...84-92
Ridges/upr slopes....79-86
* Min Humidity.......
Valleys/lwr slopes...22-30 percent
Ridges/upr slopes....25-33 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 8 mph.
Ridges/upr slopes....West winds 5 to 8 mph.
* Mixing Height..........5500 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY NIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...54-61
Ridges/upr slopes....61-65
* Max Humidity.......
Valleys/lwr slopes...56-66 percent
Ridges/upr slopes....48-58 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 8 mph in the
evening...becoming downslope/downvalley 2
to 5 mph.
Ridges/upr slopes....Northwest winds 5 to 9 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.SUNDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...90-93
Ridges/upr slopes....80-88
* Min Humidity.......
Valleys/lwr slopes...23-31 percent
Ridges/upr slopes....26-34 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northeast winds 5 mph...shifting to the
south 5 to 6 mph in the afternoon.
Ridges/upr slopes....Northeast winds 5 mph...shifting to the
southeast 5 to 6 mph in the afternoon.
* Mixing Height..........6200 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ421-221330-
Western Lake Including Lakeport-
204 PM PDT Fri Aug 21 2026
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...50-57
Ridges/upr slopes....53-60
* Max Humidity.......
Valleys/lwr slopes...67-82 percent
Ridges/upr slopes....56-71 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 8 mph.
Ridges/upr slopes....West winds 5 to 9 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...82-88
Ridges/upr slopes....77-81
* Min Humidity.......
Valleys/lwr slopes...31-39 percent
Ridges/upr slopes....31-38 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 8 mph.
Ridges/upr slopes....Northwest winds 5 to 9 mph.
* Mixing Height..........5800 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY NIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...52-58
Ridges/upr slopes....55-63
* Max Humidity.......
Valleys/lwr slopes...61-76 percent
Ridges/upr slopes....54-64 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 9 mph.
Ridges/upr slopes....Northwest winds 5 to 9 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.SUNDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...87-95
Ridges/upr slopes....83-88
* Min Humidity.......
Valleys/lwr slopes...22-30 percent
Ridges/upr slopes....21-27 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 1 to 3 mph...becoming
southeast 5 mph in the afternoon.
Ridges/upr slopes....Variable 2 to 4 mph...becoming south 5 to
6 mph in the afternoon.
* Mixing Height..........7300 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
.EXTENDED FORECAST FOR DAYS 3 THROUGH 5...
...Northwest California Coast...
.MONDAY...Mostly cloudy. Patchy fog. Lows in the lower to mid
50s. Highs 63 to 70. Northwest winds 5 mph.
.TUESDAY...Mostly cloudy. Patchy fog. Lows in the lower to mid
50s. Highs 61 to 67. Winds generally less than 5 mph.
.WEDNESDAY...Mostly cloudy. Patchy fog. Lows in the lower to mid
50s. Highs 61 to 68. Winds generally less than 5 mph.
...Northwest California Interior...
.MONDAY...Partly cloudy. Lows 55 to 63. Highs 83 to 94. South
winds 5 mph.
.TUESDAY...Mostly clear. Lows 53 to 61. Highs 81 to 92. Winds
generally less than 5 mph.
.WEDNESDAY...Partly cloudy. Lows 53 to 61. Highs 82 to 93.
Northwest winds 5 mph.
.6 to 10 DAY OUTLOOK...Thursday August 27 THROUGH Monday August 31, 2026...
FOR NW CALIF...NEAR NORMAL TEMPERATURES AND NEAR NORMAL PRECIPITATION.
$$
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