Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Eureka, CA
Issued by NWS Eureka, CA
527
FNUS56 KEKA 082037
FWFEKA
FIRE WEATHER PLANNING FORECAST FOR NORTHWEST CALIFORNIA
NATIONAL WEATHER SERVICE Eureka CA
137 PM PDT Fri Aug 8 2025
...GUSTY OFFSHORE WINDS AND POOR RH RECOVERIES WILL BRING ELEVATED
FIRE WEATHER CONDITIONS FOR INTERIOR DEL NORTE COUNTY THIS TONIGHT
THROUGH SATURDAY...
...HOT AND DRY CONDITIONS WILL INCREASE FIRE DANGER FOR ALL
INTERIOR ZONES THROUGH THE WEEKEND...
.DISCUSSION...Conditions continue to warm and dry this afternoon
with slightly enhanced northwest winds along exposed ridges. Dry
northeast flow and poor overnight recoveries are expected along
high peaks and ridges of Humboldt and Del Norte Counties overnight
into Saturday, promoting elevated fire weather conditions.
Otherwise, a building heat wave will be the main concern through
Monday with interior highs peaking in excess of 100 by Sunday and
RH dropping to near 20 percent and perhaps even the single digits
in Trinity County. Enhanced thermal belts will also allow for
poor overnight recovery with RH staying below 40 percent. Marine
influence will be restricted to only the immediate coast.
Thankfully, wind will be generally weak and terrain driven with
low mixing heights.
CAZ201-091315-
North Coast-
137 PM PDT Fri Aug 8 2025
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...54-62
Ridges/upr slopes....57-65
* Max Humidity.......
Valleys/lwr slopes...61-76 percent
Ridges/upr slopes....51-61 percent
* 20-Foot Winds...
Valleys/lwr slopes...North winds 5 to 10 mph.
Ridges/upr slopes....North winds 6 to 13 mph...shifting to the
northeast 5 to 10 mph after midnight.
* Mixing Height..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY...
* Sky/Weather............Sunny. Patchy dense fog in the morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...82-90
Ridges/upr slopes....83-91
* Min Humidity.......
Valleys/lwr slopes...55-65 percent
Ridges/upr slopes....44-54 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 8 mph.
Ridges/upr slopes....Northwest winds 5 to 8 mph.
* Mixing Height..........2300 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY NIGHT...
* Sky/Weather............Partly cloudy.
* Min Temperature.......
Valleys/lwr slopes...58-65
Ridges/upr slopes....61-69
* Max Humidity.......
Valleys/lwr slopes...62-77 percent
Ridges/upr slopes....52-62 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 6 mph...shifting to
the east 5 mph after midnight.
Ridges/upr slopes....North winds 5 to 7 mph...shifting to the
east after midnight.
* Mixing Height..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.SUNDAY...
* Sky/Weather............Partly cloudy then becoming sunny.
* Max Temperature.......
Valleys/lwr slopes...81-89
Ridges/upr slopes....78-86
* Min Humidity.......
Valleys/lwr slopes...59-69 percent
Ridges/upr slopes....52-62 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southeast winds 5 to 6 mph...shifting to
the west in the afternoon.
Ridges/upr slopes....East winds 5 to 7 mph...shifting to the
west 5 mph in the afternoon.
* Mixing Height..........2400 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ202-091315-
Coastal Mendocino-
137 PM PDT Fri Aug 8 2025
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...55-61
Ridges/upr slopes....59-65
* Max Humidity.......
Valleys/lwr slopes...67-82 percent
Ridges/upr slopes....55-70 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
Ridges/upr slopes....North winds 5 to 6 mph...shifting to the
east after midnight.
* Mixing Height..........100 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...72-80
Ridges/upr slopes....79-87
* Min Humidity.......
Valleys/lwr slopes...63-73 percent
Ridges/upr slopes....42-52 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southwest winds 5 to 7 mph.
Ridges/upr slopes....Southwest winds 5 to 7 mph.
* Mixing Height..........1300 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY NIGHT...
* Sky/Weather............Mostly clear.
* Min Temperature.......
Valleys/lwr slopes...56-59
Ridges/upr slopes....55-62
* Max Humidity.......
Valleys/lwr slopes...74-89 percent
Ridges/upr slopes....61-76 percent
* 20-Foot Winds...
Valleys/lwr slopes...Downslope/downvalley 1 to 3 mph.
Ridges/upr slopes....Variable 1 to 3 mph.
* Mixing Height..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.SUNDAY...
* Sky/Weather............Partly cloudy then becoming sunny. Areas
of dense fog late in the morning.
Widespread dense fog in the afternoon.
* Max Temperature.......
Valleys/lwr slopes...72-80
Ridges/upr slopes....77-85
* Min Humidity.......
Valleys/lwr slopes...62-72 percent
Ridges/upr slopes....44-54 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....Variable 2 to 4 mph...becoming southwest 5
to 6 mph in the afternoon.
* Mixing Height..........1400 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ203-204-091315-
Upper Smith-Lower Middle Klamath-
137 PM PDT Fri Aug 8 2025
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...59-62
Ridges/upr slopes....61-66
* Max Humidity.......
Valleys/lwr slopes...40-50 percent
Ridges/upr slopes....28-36 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northeast winds 5 to 12 mph.
Ridges/upr slopes....Northeast winds 5 to 12 mph.
* Mixing Height..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY...
* Sky/Weather............Sunny then becoming partly cloudy.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...97-105
Ridges/upr slopes....86-94
* Min Humidity.......
Valleys/lwr slopes...14-22 percent
Ridges/upr slopes....17-23 percent
* 20-Foot Winds...
Valleys/lwr slopes...North winds 6 to 13 mph.
Ridges/upr slopes....North winds 6 to 13 mph.
* Mixing Height..........6900 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY NIGHT...
* Sky/Weather............Partly cloudy.
* Min Temperature.......
Valleys/lwr slopes...62-67
Ridges/upr slopes....66-71
* Max Humidity.......
Valleys/lwr slopes...44-54 percent
Ridges/upr slopes....31-41 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northeast winds 7 to 14 mph.
Ridges/upr slopes....Northeast winds 7 to 14 mph.
* Mixing Height..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.SUNDAY...
* Sky/Weather............Sunny.
* Max Temperature.......
Valleys/lwr slopes...98-106
Ridges/upr slopes....85-93
* Min Humidity.......
Valleys/lwr slopes...25-33 percent
Ridges/upr slopes....23-31 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northeast winds 5 to 8 mph...shifting to
the west 5 to 6 mph in the afternoon.
Ridges/upr slopes....East winds 5 to 10 mph...shifting to the
west 5 to 6 mph in the afternoon.
* Mixing Height..........8000 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ211-212-091315-
Hoopa-Van Duzen/Mad River-
137 PM PDT Fri Aug 8 2025
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...61-65
Ridges/upr slopes....59-67
* Max Humidity.......
Valleys/lwr slopes...45-55 percent
Ridges/upr slopes....33-43 percent
* 20-Foot Winds...
Valleys/lwr slopes...North winds 5 to 9 mph.
Ridges/upr slopes....North winds 5 to 6 mph...shifting to the
northeast 5 to 7 mph after midnight.
* Mixing Height..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...96-104
Ridges/upr slopes....86-94
* Min Humidity.......
Valleys/lwr slopes...19-27 percent
Ridges/upr slopes....16-24 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 8 mph.
Ridges/upr slopes....East winds 5 to 7 mph...shifting to the
west in the afternoon.
* Mixing Height..........6000 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY NIGHT...
* Sky/Weather............Mostly clear.
* Min Temperature.......
Valleys/lwr slopes...62-68
Ridges/upr slopes....63-71
* Max Humidity.......
Valleys/lwr slopes...46-56 percent
Ridges/upr slopes....35-45 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 east 5 to 7 mph after midnight.
* Mixing Height..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.SUNDAY...
* Sky/Weather............Sunny.
* Max Temperature.......
Valleys/lwr slopes...97-105
Ridges/upr slopes....87-95
* Min Humidity.......
Valleys/lwr slopes...20-28 percent
Ridges/upr slopes....23-31 percent
* 20-Foot Winds...
Valleys/lwr slopes...East winds 5 mph...shifting to the west 5
to 9 mph in the afternoon.
Ridges/upr slopes....East winds 5 to 7 mph...shifting to the
west 5 to 6 mph in the afternoon.
* Mixing Height..........7900 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ283-091315-
Trinity-
137 PM PDT Fri Aug 8 2025
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...61-65
Ridges/upr slopes....58-66
* Max Humidity.......
Valleys/lwr slopes...35-43 percent
Ridges/upr slopes....26-34 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 mph...shifting to the
northeast after midnight.
Ridges/upr slopes....North winds 5 to 8 mph.
* Mixing Height..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...98-104
Ridges/upr slopes....83-91
* Min Humidity.......
Valleys/lwr slopes...10-13 percent
Ridges/upr slopes....14-19 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
east 5 mph in the afternoon.
Ridges/upr slopes....Northeast winds 5 to 6 mph...shifting to
the north in the afternoon.
* Mixing Height..........9000 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY NIGHT...
* Sky/Weather............Mostly clear.
* Min Temperature.......
Valleys/lwr slopes...64-69
Ridges/upr slopes....61-69
* Max Humidity.......
Valleys/lwr slopes...35-45 percent
Ridges/upr slopes....30-38 percent
* 20-Foot Winds...
Valleys/lwr slopes...West 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 after midnight.
* Mixing Height..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.SUNDAY...
* Sky/Weather............Sunny.
* Max Temperature.......
Valleys/lwr slopes...100-106
Ridges/upr slopes....85-93
* Min Humidity.......
Valleys/lwr slopes...11-14 percent
Ridges/upr slopes....14-20 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
east 5 mph in the afternoon.
Ridges/upr slopes....East winds 5 to 7 mph.
* Mixing Height..........9900 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ276-091315-
Interior Mendocino-
137 PM PDT Fri Aug 8 2025
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...63-71
Ridges/upr slopes....64-72
* Max Humidity.......
Valleys/lwr slopes...46-56 percent
Ridges/upr slopes....44-54 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 9 mph...shifting to
the northeast 5 mph after midnight.
Ridges/upr slopes....North 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.
.SATURDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...93-101
Ridges/upr slopes....87-95
* Min Humidity.......
Valleys/lwr slopes...25-33 percent
Ridges/upr slopes....30-38 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southeast winds 5 to 6 mph...shifting to
the west 5 to 9 mph in the afternoon.
Ridges/upr slopes....Southeast winds 5 to 6 mph...shifting to
the west 5 to 8 mph in the afternoon.
* Mixing Height..........5300 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY NIGHT...
* Sky/Weather............Mostly clear.
* Min Temperature.......
Valleys/lwr slopes...62-70
Ridges/upr slopes....63-71
* Max Humidity.......
Valleys/lwr slopes...49-59 percent
Ridges/upr slopes....47-57 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 7 mph...shifting to
the northeast 5 mph after midnight.
* Mixing Height..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.SUNDAY...
* Sky/Weather............Sunny.
* Max Temperature.......
Valleys/lwr slopes...93-101
Ridges/upr slopes....87-95
* Min Humidity.......
Valleys/lwr slopes...25-33 percent
Ridges/upr slopes....29-37 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 7 mph in the afternoon.
* Mixing Height..........6400 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ277-091315-
W Mendocino NF/E Mendocino Unit-
137 PM PDT Fri Aug 8 2025
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...61-69
Ridges/upr slopes....65-73
* Max Humidity.......
Valleys/lwr slopes...39-49 percent
Ridges/upr slopes....31-39 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 9 mph...shifting to
the northeast 5 mph after midnight.
Ridges/upr slopes....North winds 5 to 7 mph...shifting to the
northeast 5 to 6 mph after midnight.
* Mixing Height..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...96-104
Ridges/upr slopes....85-93
* Min Humidity.......
Valleys/lwr slopes...15-20 percent
Ridges/upr slopes....15-21 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
west 5 to 7 mph in the afternoon.
Ridges/upr slopes....East winds 5 to 6 mph...shifting to the
southwest 5 to 7 mph in the afternoon.
* Mixing Height..........8500 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY NIGHT...
* Sky/Weather............Mostly clear.
* Min Temperature.......
Valleys/lwr slopes...62-70
Ridges/upr slopes....66-73
* Max Humidity.......
Valleys/lwr slopes...41-51 percent
Ridges/upr slopes....31-39 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 northeast 5 to 6 mph after midnight.
* Mixing Height..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.SUNDAY...
* Sky/Weather............Sunny.
* Max Temperature.......
Valleys/lwr slopes...98-106
Ridges/upr slopes....87-95
* Min Humidity.......
Valleys/lwr slopes...16-21 percent
Ridges/upr slopes....16-21 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....East winds 5 to 6 mph...shifting to the
southwest in the afternoon.
* Mixing Height..........8800 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ264-091315-
Lake County Portion of Lake/Napa/Sonoma RU-
137 PM PDT Fri Aug 8 2025
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...around 67
Ridges/upr slopes....74-77
* Max Humidity.......
Valleys/lwr slopes...37 percent
Ridges/upr slopes....28-36 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 9 mph...shifting to
the north 5 mph after midnight.
Ridges/upr slopes....Northwest winds 5 to 8 mph...shifting to
the north 5 to 7 mph after midnight.
* Mixing Height..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...around 97
Ridges/upr slopes....90-95
* Min Humidity.......
Valleys/lwr slopes...14 percent
Ridges/upr slopes....16-23 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southeast winds 5 mph...shifting to the
southwest 5 to 9 mph in the afternoon.
Ridges/upr slopes....East winds 5 to 7 mph...shifting to the
southwest 5 to 8 mph in the afternoon.
* Mixing Height..........8100 ft AGL.
* Chc of Wetting Rain....0 percent.
.SATURDAY NIGHT...
* Sky/Weather............Mostly clear.
* Min Temperature.......
Valleys/lwr slopes...around 66
Ridges/upr slopes....74-77
* Max Humidity.......
Valleys/lwr slopes...40 percent
Ridges/upr slopes....31-39 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 6 to 9 mph...shifting to
the north 5 mph after midnight.
Ridges/upr slopes....West winds 5 to 8 mph...shifting to the
north 5 to 6 mph after midnight.
* Mixing Height..........0 ft AGL.
* Chc of Wetting Rain....0 percent.
.SUNDAY...
* Sky/Weather............Sunny.
* Max Temperature.......
Valleys/lwr slopes...around 98
Ridges/upr slopes....91-95
* Min Humidity.......
Valleys/lwr slopes...14 percent
Ridges/upr slopes....17-25 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....East winds 5 to 6 mph...shifting to the
southwest 5 to 7 mph in the afternoon.
* Mixing Height..........7500 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
.EXTENDED FORECAST FOR DAYS 3 THROUGH 5...
...Northwest California Coast...
.MONDAY...Partly cloudy. Lows in the mid to upper 50s. Highs
66 to 74. Winds generally less than 5 mph.
.TUESDAY...Mostly cloudy. Lows in the 50s. Highs 65 to 72. Winds
generally less than 5 mph.
.WEDNESDAY...Mostly cloudy with slight chance of rain. Lows in
the lower to mid 50s. Highs 63 to 69. Northwest winds 5 mph.
...Northwest California Interior...
.MONDAY...Clear. Lows 62 to 70. Highs 91 to 104. West winds
5 mph.
.TUESDAY...Clear. Lows 60 to 68. Highs 88 to 101. West winds
5 mph.
.WEDNESDAY...Mostly clear. Lows 56 to 64. Highs 83 to 95. West
winds 5 mph.
.6 to 10 DAY OUTLOOK...Thursday August 14 THROUGH Monday August 18, 2025...
FOR NW CALIF...BELOW NORMAL TEMPERATURES AND NEAR NORMAL PRECIPITATION.
$$
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