Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Eureka, CA
Issued by NWS Eureka, CA
652
FNUS56 KEKA 271952
FWFEKA
FIRE WEATHER PLANNING FORECAST FOR NORTHWEST CALIFORNIA
NATIONAL WEATHER SERVICE Eureka CA
1252 PM PDT Wed Aug 27 2025
...ISOLATED DRY THUNDERSTORMS POSSIBLE WEDNESDAY AFTERNOON ZONE
283...
.DISCUSSION...The bulk of the monsoonal moisture pulls east on
Wednesday. The ingredients for some isolated thunderstorms over
northeast Trinity County will still exist, but the activity may
mostly stay east of the county boundary. Westerly winds increase
Wednesday afternoon with minimum RH lowering to the low 20s to
upper teens. Minimum RH will continue to lower Thursday, down to
the mid to low teens for the far interior. Southwesterly to
southerly winds will also increase Thursday afternoon as a
shortwave trough nears offshore to increase the fire weather
threat, particularly in Lake County where locally critical
conditions may develop in some isolated locations. Breezy westerly
to southerly winds will likely develop Friday as the trough clips
the region while passing north, but minimum RH will have begun
generally trending higher and the amount of influence from the
trough is still in question.
CAZ201-281330-
North Coast-
1252 PM PDT Wed Aug 27 2025
.TONIGHT...
* Sky/Weather............Partly cloudy. Patchy dense fog.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...50-54
Ridges/upr slopes....51-58
* Max Humidity.......
Valleys/lwr slopes...79-94 percent
Ridges/upr slopes....68-83 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..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY...
* Sky/Weather............Partly cloudy then becoming sunny. Patchy
fog in the morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...71-79
Ridges/upr slopes....67-75
* Min Humidity.......
Valleys/lwr slopes...70-80 percent
Ridges/upr slopes....62-72 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southwest winds 5 to 7 mph.
Ridges/upr slopes....West winds 5 to 7 mph.
* Mixing Height..........2100 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY NIGHT...
* Sky/Weather............Mostly clear.
* Min Temperature.......
Valleys/lwr slopes...49-54
Ridges/upr slopes....50-58
* Max Humidity.......
Valleys/lwr slopes...74-89 percent
Ridges/upr slopes....62-77 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 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
* Mixing Height..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY...
* Sky/Weather............Partly cloudy then becoming mostly cloudy
then becoming partly cloudy.
* Max Temperature.......
Valleys/lwr slopes...72-80
Ridges/upr slopes....68-76
* Min Humidity.......
Valleys/lwr slopes...65-75 percent
Ridges/upr slopes....58-68 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....Variable 2 to 4 mph...becoming west 5 to 6
mph in the afternoon.
* Mixing Height..........2800 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ202-281330-
Coastal Mendocino-
1252 PM PDT Wed Aug 27 2025
.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...51-54
Ridges/upr slopes....46-53
* Max Humidity.......
Valleys/lwr slopes...84-99 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....Southwest winds 5 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
* Mixing Height..........100 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY...
* Sky/Weather............Partly cloudy then becoming sunny. Patchy
fog in the morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...65-73
Ridges/upr slopes....69-77
* Min Humidity.......
Valleys/lwr slopes...64-79 percent
Ridges/upr slopes....54-64 percent
* 20-Foot Winds...
Valleys/lwr slopes...South winds 5 to 6 mph...shifting to the
southwest in the afternoon.
Ridges/upr slopes....South winds 5 mph...shifting to the
southwest 5 to 6 mph in the afternoon.
* Mixing Height..........1800 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY NIGHT...
* Sky/Weather............Mostly clear. Patchy fog in the late
evening and overnight.
* Min Temperature.......
Valleys/lwr slopes...49-52
Ridges/upr slopes....45-53
* Max Humidity.......
Valleys/lwr slopes...83-98 percent
Ridges/upr slopes....72-87 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 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
* Mixing Height..........100 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY...
* Sky/Weather............Partly cloudy then becoming sunny. Patchy
fog early in the morning.
* Max Temperature.......
Valleys/lwr slopes...66-74
Ridges/upr slopes....70-78
* Min Humidity.......
Valleys/lwr slopes...64-79 percent
Ridges/upr slopes....54-64 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....Variable 2 to 4 mph...becoming west 5 to 6
mph in the afternoon.
* Mixing Height..........1600 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ203-204-281330-
Upper Smith-Lower Middle Klamath-
1252 PM PDT Wed Aug 27 2025
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...56-60
Ridges/upr slopes....59-62
* Max Humidity.......
Valleys/lwr slopes...55-70 percent
Ridges/upr slopes....42-52 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...shifting to
the southeast after midnight.
* Mixing Height..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...85-93
Ridges/upr slopes....72-80
* Min Humidity.......
Valleys/lwr slopes...37-45 percent
Ridges/upr slopes....28-36 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southwest winds 5 to 8 mph.
Ridges/upr slopes....Southwest winds 5 to 8 mph.
* Mixing Height..........5300 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY NIGHT...
* Sky/Weather............Clear.
* Min Temperature.......
Valleys/lwr slopes...54-59
Ridges/upr slopes....around 60
* Max Humidity.......
Valleys/lwr slopes...51-61 percent
Ridges/upr slopes....36-46 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...shifting to
the east after midnight.
* Mixing Height..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY...
* Sky/Weather............Sunny then becoming partly cloudy.
* Max Temperature.......
Valleys/lwr slopes...83-91
Ridges/upr slopes....70-78
* Min Humidity.......
Valleys/lwr slopes...34-42 percent
Ridges/upr slopes....30-38 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 5 mph...becoming
southwest 5 to 8 mph in the afternoon.
Ridges/upr slopes....Southeast winds 5 to 6 mph...shifting to
the southwest 5 to 7 mph in the afternoon.
* Mixing Height..........7400 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ211-212-281330-
Hoopa-Van Duzen/Mad River-
1252 PM PDT Wed Aug 27 2025
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...53-59
Ridges/upr slopes....52-60
* Max Humidity.......
Valleys/lwr slopes...66-81 percent
Ridges/upr slopes....50-60 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....South winds 5 to 7 mph.
* Mixing Height..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...87-95
Ridges/upr slopes....77-85
* Min Humidity.......
Valleys/lwr slopes...26-34 percent
Ridges/upr slopes....22-30 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southwest winds 5 to 8 mph.
Ridges/upr slopes....Southwest winds 5 to 8 mph.
* Mixing Height..........5800 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY NIGHT...
* Sky/Weather............Mostly clear.
* Min Temperature.......
Valleys/lwr slopes...52-59
Ridges/upr slopes....53-61
* Max Humidity.......
Valleys/lwr slopes...55-65 percent
Ridges/upr slopes....39-49 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....South winds 5 to 6 mph...shifting to the
southeast after midnight.
* Mixing Height..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY...
* Sky/Weather............Sunny.
* Max Temperature.......
Valleys/lwr slopes...85-93
Ridges/upr slopes....75-83
* Min Humidity.......
Valleys/lwr slopes...22-30 percent
Ridges/upr slopes....24-32 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 5 mph...becoming
west 5 to 8 mph in the afternoon.
Ridges/upr slopes....Southeast winds 5 to 7 mph...shifting to
the southwest 5 to 9 mph in the afternoon.
* Mixing Height..........6700 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ283-281330-
Trinity-
1252 PM PDT Wed Aug 27 2025
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......10% decreasing to 0% after midnight.
* Min Temperature.......
Valleys/lwr slopes...56-61
Ridges/upr slopes....52-60
* Max Humidity.......
Valleys/lwr slopes...50-60 percent
Ridges/upr slopes....43-53 percent
* 20-Foot Winds...
Valleys/lwr slopes...South winds 5 to 6 mph...shifting to the
northeast 5 mph after midnight.
Ridges/upr slopes....Southeast winds 5 to 8 mph.
* Mixing Height..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...88-94
Ridges/upr slopes....74-82
* Min Humidity.......
Valleys/lwr slopes...11-15 percent
Ridges/upr slopes....13-19 percent
* 20-Foot Winds...
Valleys/lwr slopes...East winds 5 to 8 mph.
Ridges/upr slopes....Southeast winds 5 to 8 mph...shifting to
the south 6 to 9 mph in the afternoon.
* Mixing Height..........8700 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY NIGHT...
* Sky/Weather............Clear.
* Min Temperature.......
Valleys/lwr slopes...56-61
Ridges/upr slopes....53-61
* Max Humidity.......
Valleys/lwr slopes...43-53 percent
Ridges/upr slopes....30-38 percent
* 20-Foot Winds...
Valleys/lwr slopes...South winds 5 to 6 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
Ridges/upr slopes....South winds 5 to 7 mph.
* Mixing Height..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY...
* Sky/Weather............Sunny.
* Max Temperature.......
Valleys/lwr slopes...89-94
Ridges/upr slopes....74-82
* Min Humidity.......
Valleys/lwr slopes...13-18 percent
Ridges/upr slopes....16-24 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....South winds 5 to 9 mph.
* Mixing Height..........9700 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ276-281330-
Interior Mendocino-
1252 PM PDT Wed Aug 27 2025
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...48-56
Ridges/upr slopes....50-58
* Max Humidity.......
Valleys/lwr slopes...65-80 percent
Ridges/upr slopes....63-78 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....South winds 5 to 7 mph.
* Mixing Height..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...82-90
Ridges/upr slopes....76-84
* Min Humidity.......
Valleys/lwr slopes...32-40 percent
Ridges/upr slopes....38-46 percent
* 20-Foot Winds...
Valleys/lwr slopes...South winds 5 to 8 mph.
Ridges/upr slopes....South winds 5 to 6 mph...shifting to the
southwest in the afternoon.
* Mixing Height..........3900 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY NIGHT...
* Sky/Weather............Mostly clear.
* Min Temperature.......
Valleys/lwr slopes...50-58
Ridges/upr slopes....50-58
* Max Humidity.......
Valleys/lwr slopes...59-74 percent
Ridges/upr slopes....56-71 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..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY...
* Sky/Weather............Sunny.
* Max Temperature.......
Valleys/lwr slopes...81-89
Ridges/upr slopes....76-84
* Min Humidity.......
Valleys/lwr slopes...36-44 percent
Ridges/upr slopes....39-47 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 5 mph...becoming
southwest 5 to 8 mph in the afternoon.
Ridges/upr slopes....Southeast winds 5 mph...shifting to the
southwest 5 to 6 mph in the afternoon.
* Mixing Height..........6300 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ277-281330-
W Mendocino NF/E Mendocino Unit-
1252 PM PDT Wed Aug 27 2025
.TONIGHT...
* Sky/Weather............Clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...51-59
Ridges/upr slopes....56-63
* Max Humidity.......
Valleys/lwr slopes...53-63 percent
Ridges/upr slopes....34-44 percent
* 20-Foot Winds...
Valleys/lwr slopes...South winds 5 to 7 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
Ridges/upr slopes....Southeast winds 5 to 8 mph.
* Mixing Height..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...88-95
Ridges/upr slopes....77-85
* Min Humidity.......
Valleys/lwr slopes...14-21 percent
Ridges/upr slopes....13-18 percent
* 20-Foot Winds...
Valleys/lwr slopes...South winds 5 to 8 mph.
Ridges/upr slopes....South winds 5 to 9 mph.
* Mixing Height..........8000 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY NIGHT...
* Sky/Weather............Mostly clear.
* Min Temperature.......
Valleys/lwr slopes...53-61
Ridges/upr slopes....58-65
* Max Humidity.......
Valleys/lwr slopes...44-54 percent
Ridges/upr slopes....29-37 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...shifting to
the southeast 5 mph after midnight.
* Mixing Height..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY...
* Sky/Weather............Sunny.
* Max Temperature.......
Valleys/lwr slopes...87-95
Ridges/upr slopes....76-84
* Min Humidity.......
Valleys/lwr slopes...17-24 percent
Ridges/upr slopes....17-23 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 5 mph...becoming
southwest 5 to 9 mph in the afternoon.
Ridges/upr slopes....Southeast winds 5 mph...shifting to the
southwest 5 to 9 mph in the afternoon.
* Mixing Height..........8700 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ264-281330-
Lake County Portion of Lake/Napa/Sonoma RU-
1252 PM PDT Wed Aug 27 2025
.TONIGHT...
* Sky/Weather............Clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...around 54
Ridges/upr slopes....61-64
* Max Humidity.......
Valleys/lwr slopes...43 percent
Ridges/upr slopes....30-40 percent
* 20-Foot Winds...
Valleys/lwr slopes...South winds 5 to 6 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
Ridges/upr slopes....South winds 5 to 9 mph.
* Mixing Height..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...around 88
Ridges/upr slopes....80-85
* Min Humidity.......
Valleys/lwr slopes...14 percent
Ridges/upr slopes....14-22 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southeast winds 5 to 8 mph.
Ridges/upr slopes....Southeast winds 5 to 6 mph...shifting to
the south 5 to 8 mph in the afternoon.
* Mixing Height..........7600 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY NIGHT...
* Sky/Weather............Clear.
* Min Temperature.......
Valleys/lwr slopes...around 56
Ridges/upr slopes....64-68
* Max Humidity.......
Valleys/lwr slopes...45 percent
Ridges/upr slopes....30-40 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 8 mph.
* Mixing Height..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY...
* Sky/Weather............Sunny.
* Max Temperature.......
Valleys/lwr slopes...around 88
Ridges/upr slopes....80-86
* Min Humidity.......
Valleys/lwr slopes...18 percent
Ridges/upr slopes....20-28 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
southwest 5 to 7 mph in the afternoon.
Ridges/upr slopes....North winds 5 mph...shifting to the
southwest 5 to 9 mph in the afternoon.
* Mixing Height..........9400 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
.EXTENDED FORECAST FOR DAYS 3 THROUGH 5...
...Northwest California Coast...
.SATURDAY...Partly cloudy. Lows in the lower 50s. Highs 66 to 72.
North winds 5 mph.
.SUNDAY...Mostly cloudy. Lows in the lower to mid 50s. Highs
64 to 71. North winds 5 mph.
.LABOR DAY...Partly cloudy. Lows in the lower to mid 50s. Highs
63 to 70. North winds 5 mph.
...Northwest California Interior...
.SATURDAY...Clear. Lows 53 to 61. Highs 82 to 94. Northwest winds
5 mph.
.SUNDAY...Mostly clear. Lows 54 to 62. Highs 83 to 95. Northwest
winds 5 mph.
.LABOR DAY...Mostly clear. Lows 54 to 62. Highs 84 to 95.
Northwest winds 5 mph.
.6 to 10 DAY OUTLOOK...Tuesday September 2 THROUGH Saturday September 6, 2025...
FOR NW CALIF...ABOVE NORMAL TEMPERATURES AND ABOVE NORMAL PRECIPITATION.
$$
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