Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Eureka, CA
Issued by NWS Eureka, CA
286
FNUS56 KEKA 192058
FWFEKA
FIRE WEATHER PLANNING FORECAST FOR NORTHWEST CALIFORNIA
NATIONAL WEATHER SERVICE Eureka CA
158 PM PDT Tue Aug 19 2025
.DISCUSSION...A warming and drying trend will continue. Northeast
winds will develop Wednesday night and this will cause an
accelerated drop in Minimum RH for Thursday, with values down to
the low teens to some single digits for zones 283, 277 and 264.
Inland heating will intensify Thursday, with a further increase
Friday. The heat and low RH will remain through the weekend.
Afternoon westerly wind surges will also bring fire weather
concerns, particularly in zones 264 and 276. Monsoonal moisture
will begin clipping the eastern zones starting Friday. There is a
small but impactful chance (5-10%) for isolated dry thunderstorms
starting Saturday for Trinity County. Chances for thunderstorms
may then trend higher through Sunday and early next week with
additional monsoonal moisture.
CAZ201-201330-
North Coast-
158 PM PDT Tue Aug 19 2025
.TONIGHT...
* Sky/Weather............Mostly clear. Patchy dense fog in the late
evening and early morning.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...51-54
Ridges/upr slopes....51-56
* Max Humidity.......
Valleys/lwr slopes...81-96 percent
Ridges/upr slopes....69-84 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 11 mph.
Ridges/upr slopes....North winds 5 to 12 mph.
* Mixing Height..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY...
* Sky/Weather............Partly cloudy then becoming sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...73-81
Ridges/upr slopes....69-77
* Min Humidity.......
Valleys/lwr slopes...69-79 percent
Ridges/upr slopes....62-72 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 10 mph.
Ridges/upr slopes....Northwest winds 5 to 11 mph.
* Mixing Height..........2400 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY NIGHT...
* Sky/Weather............Mostly clear.
* Min Temperature.......
Valleys/lwr slopes...52-57
Ridges/upr slopes....53-60
* Max Humidity.......
Valleys/lwr slopes...77-92 percent
Ridges/upr slopes....64-79 percent
* 20-Foot Winds...
Valleys/lwr slopes...North winds 5 to 9 mph.
Ridges/upr slopes....Northwest winds 5 to 11 mph...shifting to
the north 5 to 9 mph after midnight.
* Mixing Height..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY...
* Sky/Weather............Sunny.
* Max Temperature.......
Valleys/lwr slopes...75-83
Ridges/upr slopes....71-79
* Min Humidity.......
Valleys/lwr slopes...66-76 percent
Ridges/upr slopes....60-70 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 8 mph.
Ridges/upr slopes....Northwest winds 5 to 8 mph.
* Mixing Height..........2400 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ202-201330-
Coastal Mendocino-
158 PM PDT Tue Aug 19 2025
.TONIGHT...
* Sky/Weather............Mostly clear. Patchy fog late in the
night.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...51-56
Ridges/upr slopes....50-58
* Max Humidity.......
Valleys/lwr slopes...77-92 percent
Ridges/upr slopes....68-83 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 10 mph.
Ridges/upr slopes....North winds 5 to 10 mph.
* Mixing Height..........100 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY...
* Sky/Weather............Partly cloudy then becoming sunny. Patchy
fog early in the morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...69-77
Ridges/upr slopes....74-82
* Min Humidity.......
Valleys/lwr slopes...66-76 percent
Ridges/upr slopes....48-58 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 10 mph.
Ridges/upr slopes....Northwest winds 5 to 10 mph.
* Mixing Height..........1400 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY NIGHT...
* Sky/Weather............Mostly clear. Patchy fog early in the
morning.
* Min Temperature.......
Valleys/lwr slopes...52-57
Ridges/upr slopes....51-59
* Max Humidity.......
Valleys/lwr slopes...78-93 percent
Ridges/upr slopes....69-84 percent
* 20-Foot Winds...
Valleys/lwr slopes...North winds 5 to 9 mph.
Ridges/upr slopes....North winds 5 to 9 mph.
* Mixing Height..........100 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY...
* Sky/Weather............Sunny. Patchy fog early in the morning.
* Max Temperature.......
Valleys/lwr slopes...69-77
Ridges/upr slopes....75-83
* Min Humidity.......
Valleys/lwr slopes...65-75 percent
Ridges/upr slopes....50-60 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 9 mph.
Ridges/upr slopes....Northwest winds 5 to 9 mph.
* Mixing Height..........1600 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ203-204-201330-
Upper Smith-Lower Middle Klamath-
158 PM PDT Tue Aug 19 2025
.TONIGHT...
* Sky/Weather............Clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...53-56
Ridges/upr slopes....54-57
* Max Humidity.......
Valleys/lwr slopes...65-80 percent
Ridges/upr slopes....53-63 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southwest winds 5 to 8 mph...shifting to
the east 5 mph after midnight.
Ridges/upr slopes....Northwest winds 5 to 8 mph...shifting to
the northeast 5 to 6 mph after midnight.
* Mixing Height..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...85-93
Ridges/upr slopes....71-79
* Min Humidity.......
Valleys/lwr slopes...37-45 percent
Ridges/upr slopes....36-46 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northeast winds 5 mph...shifting to the
west 5 to 7 mph in the afternoon.
Ridges/upr slopes....Northeast winds 5 to 6 mph...shifting to
the northwest 5 to 7 mph in the afternoon.
* Mixing Height..........5900 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY NIGHT...
* Sky/Weather............Clear.
* Min Temperature.......
Valleys/lwr slopes...56-60
Ridges/upr slopes....59-62
* Max Humidity.......
Valleys/lwr slopes...57-72 percent
Ridges/upr slopes....45-55 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 8 mph...shifting to the
northeast 5 to 9 mph after midnight.
Ridges/upr slopes....North winds 5 to 8 mph...shifting to the
northeast 5 to 9 mph after midnight.
* Mixing Height..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY...
* Sky/Weather............Sunny.
* Max Temperature.......
Valleys/lwr slopes...91-99
Ridges/upr slopes....78-86
* Min Humidity.......
Valleys/lwr slopes...29-37 percent
Ridges/upr slopes....29-37 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northeast winds 5 to 9 mph...shifting to
the northwest 5 to 8 mph in the afternoon.
Ridges/upr slopes....Northeast winds 5 to 10 mph...shifting to
the north 5 to 7 mph in the afternoon.
* Mixing Height..........6800 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ211-212-201330-
Hoopa-Van Duzen/Mad River-
158 PM PDT Tue Aug 19 2025
.TONIGHT...
* Sky/Weather............Clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...52-56
Ridges/upr slopes....49-56
* Max Humidity.......
Valleys/lwr slopes...70-85 percent
Ridges/upr slopes....55-70 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 11 mph.
Ridges/upr slopes....North winds 5 to 11 mph.
* Mixing Height..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...84-92
Ridges/upr slopes....75-83
* Min Humidity.......
Valleys/lwr slopes...30-38 percent
Ridges/upr slopes....35-43 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 10 mph.
Ridges/upr slopes....Northwest winds 5 to 10 mph.
* Mixing Height..........4800 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY NIGHT...
* Sky/Weather............Clear.
* Min Temperature.......
Valleys/lwr slopes...55-60
Ridges/upr slopes....53-61
* Max Humidity.......
Valleys/lwr slopes...64-79 percent
Ridges/upr slopes....54-64 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 10 mph...shifting to
the northeast after midnight.
Ridges/upr slopes....Northwest winds 5 to 8 mph...shifting to
the northeast 5 to 7 mph after midnight.
* Mixing Height..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY...
* Sky/Weather............Sunny.
* Max Temperature.......
Valleys/lwr slopes...91-99
Ridges/upr slopes....81-89
* Min Humidity.......
Valleys/lwr slopes...26-34 percent
Ridges/upr slopes....31-39 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 5 mph...becoming
northwest 5 to 9 mph in the afternoon.
Ridges/upr slopes....Northeast winds 5 to 7 mph...shifting to
the northwest 5 to 6 mph in the afternoon.
* Mixing Height..........6000 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ283-201330-
Trinity-
158 PM PDT Tue Aug 19 2025
.TONIGHT...
* Sky/Weather............Clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...53-57
Ridges/upr slopes....51-58
* Max Humidity.......
Valleys/lwr slopes...54-66 percent
Ridges/upr slopes....47-57 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 10 mph.
Ridges/upr slopes....Northwest winds 5 to 7 mph...shifting to
the north 5 to 6 mph after midnight.
* Mixing Height..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...90-95
Ridges/upr slopes....74-82
* Min Humidity.......
Valleys/lwr slopes...17-22 percent
Ridges/upr slopes....22-30 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 5 mph...becoming
west 5 to 9 mph in the afternoon.
Ridges/upr slopes....North winds 5 mph...shifting to the
northwest 5 to 8 mph in the afternoon.
* Mixing Height..........8300 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY NIGHT...
* Sky/Weather............Clear.
* Min Temperature.......
Valleys/lwr slopes...57-62
Ridges/upr slopes....54-62
* Max Humidity.......
Valleys/lwr slopes...52-62 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..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY...
* Sky/Weather............Sunny.
* Max Temperature.......
Valleys/lwr slopes...98-103
Ridges/upr slopes....82-90
* Min Humidity.......
Valleys/lwr slopes...10-13 percent
Ridges/upr slopes....13-21 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northeast winds 5 to 6 mph.
Ridges/upr slopes....Northeast winds 5 to 6 mph.
* Mixing Height..........9800 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ276-201330-
Interior Mendocino-
158 PM PDT Tue Aug 19 2025
.TONIGHT...
* Sky/Weather............Clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...51-59
Ridges/upr slopes....53-61
* Max Humidity.......
Valleys/lwr slopes...63-78 percent
Ridges/upr slopes....60-75 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 11 mph.
Ridges/upr slopes....Northwest winds 5 to 11 mph.
* Mixing Height..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...84-92
Ridges/upr slopes....80-88
* Min Humidity.......
Valleys/lwr slopes...34-42 percent
Ridges/upr slopes....36-44 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 12 mph.
Ridges/upr slopes....Northwest winds 5 to 12 mph.
* Mixing Height..........4200 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY NIGHT...
* Sky/Weather............Clear.
* Min Temperature.......
Valleys/lwr slopes...55-63
Ridges/upr slopes....55-63
* Max Humidity.......
Valleys/lwr slopes...59-74 percent
Ridges/upr slopes....57-72 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 11 mph.
Ridges/upr slopes....North winds 5 to 11 mph.
* Mixing Height..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY...
* Sky/Weather............Sunny.
* Max Temperature.......
Valleys/lwr slopes...88-96
Ridges/upr slopes....83-91
* Min Humidity.......
Valleys/lwr slopes...32-40 percent
Ridges/upr slopes....35-43 percent
* 20-Foot Winds...
Valleys/lwr slopes...North winds 5 to 6 mph...shifting to the
west 5 to 10 mph in the afternoon.
Ridges/upr slopes....North winds 5 to 7 mph...shifting to the
west 5 to 8 mph in the afternoon.
* Mixing Height..........5200 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ277-201330-
W Mendocino NF/E Mendocino Unit-
158 PM PDT Tue Aug 19 2025
.TONIGHT...
* Sky/Weather............Clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...50-58
Ridges/upr slopes....55-63
* Max Humidity.......
Valleys/lwr slopes...59-74 percent
Ridges/upr slopes....44-54 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 10 mph...shifting to
the north 5 to 6 mph after midnight.
Ridges/upr slopes....Northwest winds 5 to 8 mph...shifting to
the northeast 5 to 6 mph after midnight.
* Mixing Height..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...88-96
Ridges/upr slopes....78-86
* Min Humidity.......
Valleys/lwr slopes...20-25 percent
Ridges/upr slopes....20-27 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 11 mph.
Ridges/upr slopes....Northwest winds 5 to 11 mph.
* Mixing Height..........7300 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY NIGHT...
* Sky/Weather............Clear.
* Min Temperature.......
Valleys/lwr slopes...55-63
Ridges/upr slopes....60-68
* Max Humidity.......
Valleys/lwr slopes...51-61 percent
Ridges/upr slopes....37-47 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 11 mph...shifting to
the north 5 to 6 mph after midnight.
Ridges/upr slopes....Northwest winds 5 to 9 mph...shifting to
the north 5 to 6 mph after midnight.
* Mixing Height..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY...
* Sky/Weather............Sunny.
* Max Temperature.......
Valleys/lwr slopes...95-103
Ridges/upr slopes....83-91
* Min Humidity.......
Valleys/lwr slopes...15-21 percent
Ridges/upr slopes....15-20 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northeast winds 5 mph...shifting to the
west 5 to 6 mph in the afternoon.
Ridges/upr slopes....North winds 5 to 6 mph...shifting to the
west in the afternoon.
* Mixing Height..........8200 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ264-201330-
Lake County Portion of Lake/Napa/Sonoma RU-
158 PM PDT Tue Aug 19 2025
.TONIGHT...
* Sky/Weather............Clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...around 56
Ridges/upr slopes....62-67
* Max Humidity.......
Valleys/lwr slopes...56 percent
Ridges/upr slopes....38-48 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 6 to 11 mph.
Ridges/upr slopes....Northwest winds 5 to 11 mph.
* Mixing Height..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...around 89
Ridges/upr slopes....84-87
* Min Humidity.......
Valleys/lwr slopes...19 percent
Ridges/upr slopes....21-27 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 10 mph.
Ridges/upr slopes....Northwest winds 5 to 10 mph.
* Mixing Height..........7700 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY NIGHT...
* Sky/Weather............Clear.
* Min Temperature.......
Valleys/lwr slopes...around 60
Ridges/upr slopes....67-72
* Max Humidity.......
Valleys/lwr slopes...46 percent
Ridges/upr slopes....32-42 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 11 mph.
Ridges/upr slopes....Northwest winds 5 to 11 mph.
* Mixing Height..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY...
* Sky/Weather............Sunny.
* Max Temperature.......
Valleys/lwr slopes...around 94
Ridges/upr slopes....87-92
* Min Humidity.......
Valleys/lwr slopes...14 percent
Ridges/upr slopes....16-22 percent
* 20-Foot Winds...
Valleys/lwr slopes...North winds 5 to 7 mph...shifting to the
west 5 to 8 mph in the afternoon.
Ridges/upr slopes....North winds 5 to 6 mph...shifting to the
west 5 to 7 mph in the afternoon.
* Mixing Height..........7900 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
.EXTENDED FORECAST FOR DAYS 3 THROUGH 5...
...Northwest California Coast...
.FRIDAY...Partly cloudy. Patchy fog in the morning. Lows in the
lower to mid 50s. Highs 66 to 73. Northwest winds 5 mph.
.SATURDAY...Mostly cloudy. Patchy fog. Lows in the mid to upper
50s. Highs 65 to 73. Northwest winds 5 mph.
.SUNDAY...Partly cloudy. Patchy fog in the morning. Lows in the
lower to mid 50s. Highs 65 to 73. Northwest winds 5 mph.
...Northwest California Interior...
.FRIDAY...Mostly clear. Lows 60 to 68. Highs 92 to 104. Northwest
winds 5 mph.
.SATURDAY...Mostly clear. Lows 62 to 70. Highs 91 to 103. West
winds 5 mph.
.SUNDAY...Mostly clear. Lows 61 to 69. Highs 90 to 102. West
winds 5 mph.
.6 to 10 DAY OUTLOOK...Monday August 25 THROUGH Friday August 29, 2025...
FOR NW CALIF...ABOVE NORMAL TEMPERATURES AND NEAR NORMAL PRECIPITATION.
$$
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