Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Eureka, CA
Issued by NWS Eureka, CA
086
FNUS56 KEKA 171856
FWFEKA
FIRE WEATHER PLANNING FORECAST FOR NORTHWEST CALIFORNIA
NATIONAL WEATHER SERVICE Eureka CA
1156 AM PDT Sun Aug 17 2025
...ISOLATED THUNDERSTORMS POSSIBLE THIS AFTERNOON IN
TRINITY COUNTY...
.DISCUSSION...A weak cold frontal passage brought unseasonably
cool temperatures and a deep marine layer which has pushed well
inland. Recoveries are very good and minimum is RH generally above
40 percent. Enhanced northwest winds expected to persist through
Sunday afternoon. A very minor chance of showers and isolated
thunder over the highest interior mountains Sunday afternoon.
Conditions will begin a gradual warming and drying trend on
Monday.
CAZ201-181315-
North Coast-
1156 AM PDT Sun Aug 17 2025
.TONIGHT...
* Sky/Weather............Mostly cloudy. Patchy dense fog.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...48-52
Ridges/upr slopes....48-52
* Max Humidity.......
Valleys/lwr slopes...87-100 percent
Ridges/upr slopes....79-94 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 9 mph.
Ridges/upr slopes....Northwest winds 5 to 9 mph.
* Mixing Height..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.MONDAY...
* Sky/Weather............Partly cloudy then becoming sunny. Patchy
dense fog in the morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...67-75
Ridges/upr slopes....63-71
* Min Humidity.......
Valleys/lwr slopes...68-78 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..........3100 ft AGL.
* Chc of Wetting Rain....0 percent.
.MONDAY NIGHT...
* Sky/Weather............Mostly clear. Patchy fog after midnight.
* Min Temperature.......
Valleys/lwr slopes...47-52
Ridges/upr slopes....48-54
* Max Humidity.......
Valleys/lwr slopes...84-99 percent
Ridges/upr slopes....72-87 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 8 mph.
Ridges/upr slopes....North winds 5 to 8 mph.
* Mixing Height..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.TUESDAY...
* Sky/Weather............Sunny. Patchy fog early in the morning.
* Max Temperature.......
Valleys/lwr slopes...70-78
Ridges/upr slopes....65-73
* Min Humidity.......
Valleys/lwr slopes...68-78 percent
Ridges/upr slopes....64-74 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 11 mph.
Ridges/upr slopes....Northwest winds 5 to 11 mph.
* Mixing Height..........2900 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ202-181315-
Coastal Mendocino-
1156 AM PDT Sun Aug 17 2025
.TONIGHT...
* Sky/Weather............Partly cloudy then becoming mostly cloudy
then becoming partly cloudy. Patchy dense
fog after midnight.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...50-53
Ridges/upr slopes....45-53
* Max Humidity.......
Valleys/lwr slopes...85-100 percent
Ridges/upr slopes....80-95 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 10 mph.
Ridges/upr slopes....Northwest winds 5 to 10 mph.
* Mixing Height..........100 ft AGL.
* Chc of Wetting Rain....0 percent.
.MONDAY...
* Sky/Weather............Partly cloudy then becoming sunny. Patchy
fog early in the morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...63-71
Ridges/upr slopes....66-74
* Min Humidity.......
Valleys/lwr slopes...64-79 percent
Ridges/upr slopes....55-65 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 10 mph.
Ridges/upr slopes....Northwest winds 5 to 10 mph.
* Mixing Height..........2200 ft AGL.
* Chc of Wetting Rain....0 percent.
.MONDAY NIGHT...
* Sky/Weather............Mostly clear then becoming mostly cloudy
then becoming partly cloudy. Patchy fog
after midnight.
* Min Temperature.......
Valleys/lwr slopes...49-52
Ridges/upr slopes....45-53
* Max Humidity.......
Valleys/lwr slopes...84-99 percent
Ridges/upr slopes....79-94 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 9 mph.
Ridges/upr slopes....Northwest winds 5 to 9 mph.
* Mixing Height..........100 ft AGL.
* Chc of Wetting Rain....0 percent.
.TUESDAY...
* Sky/Weather............Partly cloudy then becoming sunny. Patchy
fog in the morning.
* Max Temperature.......
Valleys/lwr slopes...65-73
Ridges/upr slopes....68-76
* Min Humidity.......
Valleys/lwr slopes...65-80 percent
Ridges/upr slopes....56-66 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 11 mph.
Ridges/upr slopes....Northwest winds 5 to 11 mph.
* Mixing Height..........1900 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ203-204-181315-
Upper Smith-Lower Middle Klamath-
1156 AM PDT Sun Aug 17 2025
.TONIGHT...
* Sky/Weather............Mostly cloudy then becoming partly cloudy.
Patchy dense fog in the late evening and
overnight.
* Chance Lightning.......10%.
* Min Temperature.......
Valleys/lwr slopes...47-52
Ridges/upr slopes....around 50
* Max Humidity.......
Valleys/lwr slopes...79-94 percent
Ridges/upr slopes....63-78 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southwest winds 5 to 9 mph.
Ridges/upr slopes....West winds 5 to 7 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
* Mixing Height..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.MONDAY...
* Sky/Weather............Sunny. Patchy dense fog early in the
morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...74-82
Ridges/upr slopes....62-70
* Min Humidity.......
Valleys/lwr slopes...49-59 percent
Ridges/upr slopes....47-57 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southwest winds 5 to 9 mph.
Ridges/upr slopes....Southwest winds 5 to 9 mph.
* Mixing Height..........4000 ft AGL.
* Chc of Wetting Rain....0 percent.
.MONDAY NIGHT...
* Sky/Weather............Mostly clear.
* Min Temperature.......
Valleys/lwr slopes...49-53
Ridges/upr slopes....52-55
* Max Humidity.......
Valleys/lwr slopes...70-85 percent
Ridges/upr slopes....55-65 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southwest winds 5 to 8 mph in the
evening...becoming downslope/downvalley 2
to 5 mph.
Ridges/upr slopes....West winds 5 to 6 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
* Mixing Height..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.TUESDAY...
* Sky/Weather............Sunny.
* Max Temperature.......
Valleys/lwr slopes...80-88
Ridges/upr slopes....66-74
* Min Humidity.......
Valleys/lwr slopes...44-54 percent
Ridges/upr slopes....41-51 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 5 mph...becoming
southwest 5 to 10 mph in the afternoon.
Ridges/upr slopes....East winds 5 mph...shifting to the west 5
to 7 mph in the afternoon.
* Mixing Height..........5000 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ211-212-181315-
Hoopa-Van Duzen/Mad River-
1156 AM PDT Sun Aug 17 2025
.TONIGHT...
* Sky/Weather............Partly cloudy. Patchy fog late in the
night.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...48-52
Ridges/upr slopes....45-52
* Max Humidity.......
Valleys/lwr slopes...82-97 percent
Ridges/upr slopes....72-87 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 11 mph.
Ridges/upr slopes....West winds 5 to 8 mph in the
evening...becoming downslope/downvalley 2
to 5 mph.
* Mixing Height..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.MONDAY...
* Sky/Weather............Partly cloudy then becoming sunny. Patchy
fog early in the morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...77-85
Ridges/upr slopes....67-75
* Min Humidity.......
Valleys/lwr slopes...33-43 percent
Ridges/upr slopes....44-54 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 9 mph.
Ridges/upr slopes....Northwest winds 5 to 9 mph.
* Mixing Height..........4400 ft AGL.
* Chc of Wetting Rain....0 percent.
.MONDAY NIGHT...
* Sky/Weather............Clear.
* Min Temperature.......
Valleys/lwr slopes...49-53
Ridges/upr slopes....47-55
* Max Humidity.......
Valleys/lwr slopes...78-93 percent
Ridges/upr slopes....64-79 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 8 mph.
Ridges/upr slopes....Northwest winds 5 to 7 mph...shifting to
the northeast 5 mph after midnight.
* Mixing Height..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.TUESDAY...
* Sky/Weather............Sunny.
* Max Temperature.......
Valleys/lwr slopes...81-89
Ridges/upr slopes....71-79
* Min Humidity.......
Valleys/lwr slopes...31-41 percent
Ridges/upr slopes....39-47 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 12 mph.
Ridges/upr slopes....Northwest winds 5 to 12 mph.
* Mixing Height..........5300 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ283-181315-
Trinity-
1156 AM PDT Sun Aug 17 2025
.TONIGHT...
* Sky/Weather............Mostly cloudy then becoming partly cloudy.
Slight chance of showers and isolated
thunderstorms early in the evening.
* Chance Lightning.......20% decreasing to 0% after midnight.
* Min Temperature.......
Valleys/lwr slopes...50-55
Ridges/upr slopes....47-53
* Max Humidity.......
Valleys/lwr slopes...73-86 percent
Ridges/upr slopes....65-80 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southwest winds 5 to 9 mph.
Ridges/upr slopes....Southwest winds 5 to 8 mph...shifting to
the south 5 to 6 mph after midnight.
* Mixing Height..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.MONDAY...
* Sky/Weather............Partly cloudy then becoming sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...80-87
Ridges/upr slopes....67-75
* Min Humidity.......
Valleys/lwr slopes...20-26 percent
Ridges/upr slopes....30-38 percent
* 20-Foot Winds...
Valleys/lwr slopes...East winds 5 to 7 mph.
Ridges/upr slopes....Southeast winds 5 to 7 mph...shifting to
the south 5 to 8 mph in the afternoon.
* Mixing Height..........6100 ft AGL.
* Chc of Wetting Rain....0 percent.
.MONDAY NIGHT...
* Sky/Weather............Clear.
* Min Temperature.......
Valleys/lwr slopes...51-56
Ridges/upr slopes....48-55
* Max Humidity.......
Valleys/lwr slopes...54-69 percent
Ridges/upr slopes....50-60 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southwest winds 5 to 8 mph.
Ridges/upr slopes....Southwest winds 5 to 6 mph...shifting to
the east after midnight.
* Mixing Height..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.TUESDAY...
* Sky/Weather............Sunny.
* Max Temperature.......
Valleys/lwr slopes...85-92
Ridges/upr slopes....71-79
* Min Humidity.......
Valleys/lwr slopes...17-22 percent
Ridges/upr slopes....24-32 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 6 mph...shifting to
the south 5 to 7 mph in the afternoon.
* Mixing Height..........7700 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ276-181315-
Interior Mendocino-
1156 AM PDT Sun Aug 17 2025
.TONIGHT...
* Sky/Weather............Partly cloudy.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...46-54
Ridges/upr slopes....47-55
* Max Humidity.......
Valleys/lwr slopes...80-95 percent
Ridges/upr slopes....75-90 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 7 to 14 mph.
Ridges/upr slopes....Northwest winds 7 to 14 mph.
* Mixing Height..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.MONDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...74-82
Ridges/upr slopes....70-78
* Min Humidity.......
Valleys/lwr slopes...38-48 percent
Ridges/upr slopes....44-54 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 11 mph.
Ridges/upr slopes....West winds 5 to 11 mph.
* Mixing Height..........3900 ft AGL.
* Chc of Wetting Rain....0 percent.
.MONDAY NIGHT...
* Sky/Weather............Clear.
* Min Temperature.......
Valleys/lwr slopes...47-55
Ridges/upr slopes....48-56
* Max Humidity.......
Valleys/lwr slopes...75-90 percent
Ridges/upr slopes....70-85 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 11 mph.
Ridges/upr slopes....Northwest winds 5 to 11 mph.
* Mixing Height..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.TUESDAY...
* Sky/Weather............Sunny.
* Max Temperature.......
Valleys/lwr slopes...79-87
Ridges/upr slopes....74-82
* Min Humidity.......
Valleys/lwr slopes...39-49 percent
Ridges/upr slopes....41-51 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 6 to 13 mph.
Ridges/upr slopes....West winds 6 to 13 mph.
* Mixing Height..........4900 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ277-181315-
W Mendocino NF/E Mendocino Unit-
1156 AM PDT Sun Aug 17 2025
.TONIGHT...
* Sky/Weather............Partly cloudy.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...45-53
Ridges/upr slopes....49-55
* Max Humidity.......
Valleys/lwr slopes...80-95 percent
Ridges/upr slopes....65-80 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 9 mph.
Ridges/upr slopes....West winds 5 to 9 mph...shifting to the
northeast 5 to 6 mph after midnight.
* Mixing Height..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.MONDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...78-86
Ridges/upr slopes....68-76
* Min Humidity.......
Valleys/lwr slopes...27-34 percent
Ridges/upr slopes....31-39 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 8 mph.
Ridges/upr slopes....West winds 5 to 8 mph.
* Mixing Height..........5300 ft AGL.
* Chc of Wetting Rain....0 percent.
.MONDAY NIGHT...
* Sky/Weather............Clear.
* Min Temperature.......
Valleys/lwr slopes...47-55
Ridges/upr slopes....51-58
* Max Humidity.......
Valleys/lwr slopes...70-85 percent
Ridges/upr slopes....52-62 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 8 mph.
Ridges/upr slopes....Northwest winds 5 to 7 mph...shifting to
the east after midnight.
* Mixing Height..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.TUESDAY...
* Sky/Weather............Sunny.
* Max Temperature.......
Valleys/lwr slopes...84-92
Ridges/upr slopes....73-81
* Min Humidity.......
Valleys/lwr slopes...24-31 percent
Ridges/upr slopes....25-33 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 10 mph.
Ridges/upr slopes....West winds 5 to 10 mph.
* Mixing Height..........6800 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ264-181315-
Lake County Portion of Lake/Napa/Sonoma RU-
1156 AM PDT Sun Aug 17 2025
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...around 50
Ridges/upr slopes....55-58
* Max Humidity.......
Valleys/lwr slopes...85 percent
Ridges/upr slopes....57-72 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 8 to 12 mph.
Ridges/upr slopes....Northwest winds 5 to 12 mph.
* Mixing Height..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.MONDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...around 78
Ridges/upr slopes....71-76
* Min Humidity.......
Valleys/lwr slopes...28 percent
Ridges/upr slopes....29-37 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 6 to 10 mph.
Ridges/upr slopes....West winds 6 to 10 mph.
* Mixing Height..........5700 ft AGL.
* Chc of Wetting Rain....0 percent.
.MONDAY NIGHT...
* Sky/Weather............Clear.
* Min Temperature.......
Valleys/lwr slopes...around 51
Ridges/upr slopes....57-61
* Max Humidity.......
Valleys/lwr slopes...67 percent
Ridges/upr slopes....47-57 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 11 mph.
Ridges/upr slopes....Northwest winds 5 to 11 mph.
* Mixing Height..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.TUESDAY...
* Sky/Weather............Sunny.
* Max Temperature.......
Valleys/lwr slopes...around 84
Ridges/upr slopes....77-82
* Min Humidity.......
Valleys/lwr slopes...23 percent
Ridges/upr slopes....24-32 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 8 mph.
Ridges/upr slopes....West winds 5 to 8 mph.
* Mixing Height..........6100 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
.EXTENDED FORECAST FOR DAYS 3 THROUGH 5...
...Northwest California Coast...
.WEDNESDAY...Partly cloudy. Patchy fog. Lows in the lower to mid
50s. Highs 64 to 71. North winds 5 mph.
.THURSDAY...Partly cloudy. Lows in the lower to mid 50s. Highs
65 to 74. North winds 5 mph.
.FRIDAY...Partly cloudy. Lows in the lower to mid 50s. Highs
65 to 73. Northwest winds 5 mph.
...Northwest California Interior...
.WEDNESDAY...Clear. Lows 53 to 61. Highs 84 to 95. Northwest
winds 5 mph.
.THURSDAY...Clear. Lows 58 to 66. Highs 89 to 101. Northwest
winds 5 mph.
.FRIDAY...Clear. Lows 60 to 68. Highs 91 to 103. Northwest winds
5 mph.
.6 to 10 DAY OUTLOOK...Saturday August 23 THROUGH Wednesday August 27, 2025...
FOR NW CALIF...ABOVE NORMAL TEMPERATURES AND ABOVE NORMAL PRECIPITATION.
$$
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