Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Eureka, CA
Issued by NWS Eureka, CA
606
FNUS56 KEKA 180702
FWFEKA
FIRE WEATHER PLANNING FORECAST FOR NORTHWEST CALIFORNIA
NATIONAL WEATHER SERVICE Eureka CA
1202 AM PDT Mon Aug 18 2025
.DISCUSSION...Conditions will progress towards a warming trend as
high pressure up stream sets into the area. By Wednesday or
more likely Thursday we will see RH values in the low
to mid teens for zones 283, 277, and 264. Winds do not seem
to be problematic yet but will need to be monitored as the
weekend nears. Drying conditions will accompany the high pressure
due by mid week and strengthening as the ridge builds into
the weekend.
CAZ201-180830-
North Coast-
1202 AM PDT Mon Aug 18 2025
.TODAY...
* Sky/Weather............Mostly cloudy. Patchy dense fog late in
the morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...67-75
Ridges/upr slopes....61-69
* Min Humidity.......
Valleys/lwr slopes...73-88 percent
Ridges/upr slopes....74-89 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 10 mph.
Ridges/upr slopes....Northwest winds 5 to 10 mph.
* Mixing Height..........3000 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Mostly cloudy. Patchy fog after midnight.
* 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..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.MONDAY...
* Sky/Weather............Partly cloudy then becoming sunny. Patchy
dense fog in the morning.
* Max Temperature.......
Valleys/lwr slopes...68-76
Ridges/upr slopes....63-71
* Min Humidity.......
Valleys/lwr slopes...66-76 percent
Ridges/upr slopes....59-74 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 9 mph.
Ridges/upr slopes....Northwest winds 5 to 9 mph.
* Mixing Height..........2900 ft AGL.
* Chc of Wetting Rain....0 percent.
.MONDAY NIGHT...
* Sky/Weather............Mostly clear. Patchy dense fog in the late
evening and overnight.
* Min Temperature.......
Valleys/lwr slopes...around 50
Ridges/upr slopes....48-53
* Max Humidity.......
Valleys/lwr slopes...83-98 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..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ202-180830-
Coastal Mendocino-
1202 AM PDT Mon Aug 18 2025
.TODAY...
* Sky/Weather............Partly cloudy.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...62-70
Ridges/upr slopes....64-72
* Min Humidity.......
Valleys/lwr slopes...77-92 percent
Ridges/upr slopes....62-77 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 11 mph.
Ridges/upr slopes....Northwest winds 5 to 11 mph.
* Mixing Height..........2300 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Partly cloudy then becoming mostly cloudy
then becoming partly cloudy. Patchy fog
after midnight.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...50-53
Ridges/upr slopes....45-53
* Max Humidity.......
Valleys/lwr slopes...85-100 percent
Ridges/upr slopes....81-96 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 10 mph.
Ridges/upr slopes....Northwest winds 5 to 10 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.MONDAY...
* Sky/Weather............Partly cloudy then becoming sunny. Patchy
fog early in the morning.
* Max Temperature.......
Valleys/lwr slopes...64-72
Ridges/upr slopes....67-75
* Min Humidity.......
Valleys/lwr slopes...62-77 percent
Ridges/upr slopes....53-63 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 10 mph.
Ridges/upr slopes....Northwest winds 5 to 10 mph.
* Mixing Height..........2000 ft AGL.
* Chc of Wetting Rain....0 percent.
.MONDAY NIGHT...
* Sky/Weather............Partly cloudy. Patchy fog after midnight.
* Min Temperature.......
Valleys/lwr slopes...49-52
Ridges/upr slopes....46-53
* Max Humidity.......
Valleys/lwr slopes...84-99 percent
Ridges/upr slopes....79-94 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 9 mph.
Ridges/upr slopes....Northwest winds 5 to 9 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ203-204-180830-
Upper Smith-Lower Middle Klamath-
1202 AM PDT Mon Aug 18 2025
.TODAY...
* Sky/Weather............Mostly cloudy.
* Chance Lightning.......10%.
* Max Temperature.......
Valleys/lwr slopes...72-80
Ridges/upr slopes....59-67
* Min Humidity.......
Valleys/lwr slopes...67-77 percent
Ridges/upr slopes....60-75 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southwest winds 5 to 10 mph.
Ridges/upr slopes....Southwest winds 5 to 10 mph.
* Mixing Height..........3600 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Mostly cloudy then becoming partly cloudy.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...48-52
Ridges/upr slopes....around 50
* Max Humidity.......
Valleys/lwr slopes...79-94 percent
Ridges/upr slopes....64-79 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..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.MONDAY...
* Sky/Weather............Sunny.
* Max Temperature.......
Valleys/lwr slopes...74-82
Ridges/upr slopes....61-69
* Min Humidity.......
Valleys/lwr slopes...49-59 percent
Ridges/upr slopes....49-59 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....51-54
* 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...shifting to the
east 5 mph after midnight.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ211-212-180830-
Hoopa-Van Duzen/Mad River-
1202 AM PDT Mon Aug 18 2025
.TODAY...
* Sky/Weather............Mostly cloudy.
* Chance Lightning.......10%.
* Max Temperature.......
Valleys/lwr slopes...75-83
Ridges/upr slopes....65-73
* Min Humidity.......
Valleys/lwr slopes...45-55 percent
Ridges/upr slopes....62-72 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 11 mph.
Ridges/upr slopes....Northwest winds 5 to 11 mph.
* Mixing Height..........4100 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Partly cloudy. Patchy fog after midnight.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...49-52
Ridges/upr slopes....45-52
* Max Humidity.......
Valleys/lwr slopes...83-98 percent
Ridges/upr slopes....74-89 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 11 mph.
Ridges/upr slopes....West winds 5 to 8 mph in the
evening...becoming downslope/downvalley 2
to 5 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.MONDAY...
* Sky/Weather............Partly cloudy then becoming sunny. Patchy
fog early in the morning.
* Max Temperature.......
Valleys/lwr slopes...76-84
Ridges/upr slopes....66-74
* Min Humidity.......
Valleys/lwr slopes...33-43 percent
Ridges/upr slopes....47-57 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 9 mph.
Ridges/upr slopes....West winds 5 to 9 mph.
* Mixing Height..........4100 ft AGL.
* Chc of Wetting Rain....0 percent.
.MONDAY NIGHT...
* Sky/Weather............Clear.
* Min Temperature.......
Valleys/lwr slopes...49-52
Ridges/upr slopes....46-54
* Max Humidity.......
Valleys/lwr slopes...78-93 percent
Ridges/upr slopes....66-81 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 8 mph.
Ridges/upr slopes....Northwest winds 5 to 7 mph...shifting to
the northeast 5 to 6 mph after midnight.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ283-180830-
Trinity-
1202 AM PDT Mon Aug 18 2025
.TODAY...
* Sky/Weather............Mostly cloudy. Slight chance of showers
and isolated thunderstorms in the
afternoon.
* Chance Lightning.......20%.
* Max Temperature.......
Valleys/lwr slopes...80-86
Ridges/upr slopes....64-72
* Min Humidity.......
Valleys/lwr slopes...36-45 percent
Ridges/upr slopes....53-63 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southeast winds 5 to 8 mph.
Ridges/upr slopes....South winds 5 to 9 mph.
* Mixing Height..........6000 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Mostly cloudy then becoming partly cloudy.
Slight chance of showers and thunderstorms
early in the evening.
* Chance Lightning.......20% decreasing to 0% after midnight.
* Min Temperature.......
Valleys/lwr slopes...52-55
Ridges/upr slopes....47-53
* Max Humidity.......
Valleys/lwr slopes...73-87 percent
Ridges/upr slopes....68-83 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..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.MONDAY...
* Sky/Weather............Partly cloudy then becoming sunny.
* Max Temperature.......
Valleys/lwr slopes...80-86
Ridges/upr slopes....66-74
* Min Humidity.......
Valleys/lwr slopes...20-26 percent
Ridges/upr slopes....31-39 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southeast winds 5 to 8 mph.
Ridges/upr slopes....South winds 5 to 8 mph.
* Mixing Height..........5800 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...55-70 percent
Ridges/upr slopes....50-60 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southwest winds 5 to 8 mph.
Ridges/upr slopes....South winds 5 to 6 mph...shifting to the
east after midnight.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ276-180830-
Interior Mendocino-
1202 AM PDT Mon Aug 18 2025
.TODAY...
* Sky/Weather............Partly cloudy.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...72-80
Ridges/upr slopes....68-76
* Min Humidity.......
Valleys/lwr slopes...55-65 percent
Ridges/upr slopes....58-68 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 7 to 14 mph.
Ridges/upr slopes....West winds 7 to 14 mph.
* Mixing Height..........3600 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Partly cloudy.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...46-54
Ridges/upr slopes....47-55
* Max Humidity.......
Valleys/lwr slopes...80-95 percent
Ridges/upr slopes....77-92 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 7 to 14 mph.
Ridges/upr slopes....Northwest winds 7 to 14 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.MONDAY...
* Sky/Weather............Sunny.
* Max Temperature.......
Valleys/lwr slopes...74-82
Ridges/upr slopes....69-77
* Min Humidity.......
Valleys/lwr slopes...39-49 percent
Ridges/upr slopes....43-53 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 11 mph.
Ridges/upr slopes....West winds 5 to 11 mph.
* Mixing Height..........3500 ft AGL.
* Chc of Wetting Rain....0 percent.
.MONDAY NIGHT...
* Sky/Weather............Clear.
* Min Temperature.......
Valleys/lwr slopes...46-54
Ridges/upr slopes....48-56
* Max Humidity.......
Valleys/lwr slopes...75-90 percent
Ridges/upr slopes....71-86 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 11 mph.
Ridges/upr slopes....Northwest winds 5 to 11 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ277-180830-
W Mendocino NF/E Mendocino Unit-
1202 AM PDT Mon Aug 18 2025
.TODAY...
* Sky/Weather............Partly cloudy.
* Chance Lightning.......10%.
* Max Temperature.......
Valleys/lwr slopes...76-84
Ridges/upr slopes....66-74
* Min Humidity.......
Valleys/lwr slopes...40-49 percent
Ridges/upr slopes....53-63 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 10 mph.
Ridges/upr slopes....West winds 5 to 10 mph.
* Mixing Height..........5100 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Partly cloudy.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...46-54
Ridges/upr slopes....49-55
* Max Humidity.......
Valleys/lwr slopes...81-96 percent
Ridges/upr slopes....68-83 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..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.MONDAY...
* Sky/Weather............Sunny.
* Max Temperature.......
Valleys/lwr slopes...78-85
Ridges/upr slopes....68-76
* Min Humidity.......
Valleys/lwr slopes...27-35 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..........4900 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....53-63 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..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ264-180830-
Lake County Portion of Lake/Napa/Sonoma RU-
1202 AM PDT Mon Aug 18 2025
.TODAY...
* Sky/Weather............Partly cloudy then becoming sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...around 76
Ridges/upr slopes....70-73
* Min Humidity.......
Valleys/lwr slopes...41 percent
Ridges/upr slopes....43-53 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 11 mph.
Ridges/upr slopes....West winds 5 to 12 mph.
* Mixing Height..........6300 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...around 49
Ridges/upr slopes....55-58
* Max Humidity.......
Valleys/lwr slopes...85 percent
Ridges/upr slopes....59-74 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 8 to 12 mph.
Ridges/upr slopes....Northwest winds 5 to 12 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.MONDAY...
* Sky/Weather............Sunny.
* Max Temperature.......
Valleys/lwr slopes...around 77
Ridges/upr slopes....71-75
* Min Humidity.......
Valleys/lwr slopes...29 percent
Ridges/upr slopes....30-38 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 11 mph.
Ridges/upr slopes....West winds 5 to 11 mph.
* Mixing Height..........5200 ft AGL.
* Chc of Wetting Rain....0 percent.
.MONDAY NIGHT...
* Sky/Weather............Clear.
* Min Temperature.......
Valleys/lwr slopes...around 50
Ridges/upr slopes....56-61
* Max Humidity.......
Valleys/lwr slopes...69 percent
Ridges/upr slopes....48-58 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 11 mph.
Ridges/upr slopes....Northwest winds 5 to 11 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
.EXTENDED FORECAST FOR DAYS 3 THROUGH 5...
...Northwest California Coast...
.TUESDAY...Partly cloudy. Patchy fog in the morning. Patchy fog
after midnight. Lows in the lower 50s. Highs 62 to 68. Northwest
winds 5 mph.
.WEDNESDAY...Partly cloudy. Patchy fog in the morning. 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. Northwest winds 5 mph.
...Northwest California Interior...
.TUESDAY...Clear. Lows 52 to 60. Highs 79 to 90. Northwest winds
5 mph.
.WEDNESDAY...Clear. Lows 57 to 65. Highs 83 to 95. Northwest
winds 5 mph.
.THURSDAY...Mostly clear. Lows 60 to 68. Highs 89 to 101.
Northwest winds 5 mph.
.6 to 10 DAY OUTLOOK...Friday August 22 THROUGH Tuesday August 26, 2025...
FOR NW CALIF...ABOVE NORMAL TEMPERATURES AND ABOVE NORMAL PRECIPITATION.
$$
visit us at www.weather.gov/eureka