Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Eureka, CA
Issued by NWS Eureka, CA
326
FNUS56 KEKA 200708
FWFEKA
FIRE WEATHER PLANNING FORECAST FOR NORTHWEST CALIFORNIA
NATIONAL WEATHER SERVICE Eureka CA
1208 AM PDT Thu Aug 20 2026
...SLIGHT CHANCE OF ISOLATED DRY THUNDERSTORMS FRIDAY MORNING AND
AFTERNOON FOCUSED IN TRINITY COUNTY...
.DISCUSSION...Generally near normal temperatures are expected
through mid week with high temperatures in the low 90s for
interior valleys and minimum RH as low as 20 percent. Winds are
generally gentle and terrain driven. Marine influence will
continue to increase late in the week, increasing humidity and
some afternoon mixing through Friday. There is a very slight (5%)
chance of isolated dry thunderstorms early Friday morning and
through the day focused in Trinity and northern Humboldt Counties.
Any storms will be weak and mostly dry. Breezy conditions
develop Friday and Saturday.
CAZ401-210115-
Coastal Del Norte-
1208 AM PDT Thu Aug 20 2026
.TODAY...
* Sky/Weather............Mostly cloudy then becoming partly cloudy.
Areas of fog early in the morning, then
patchy fog late in the morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...62-68
Ridges/upr slopes....62-68
* Min Humidity.......
Valleys/lwr slopes...76-89 percent
Ridges/upr slopes....77-87 percent
* 20-Foot Winds...
Valleys/lwr slopes...Light winds 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..........1300 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Mostly cloudy. Patchy fog in the evening,
then areas of fog after midnight.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...50-53
Ridges/upr slopes....48-53
* Max Humidity.......
Valleys/lwr slopes...94-100 percent
Ridges/upr slopes....93-100 percent
* 20-Foot Winds...
Valleys/lwr slopes...Light winds 1 to 3 mph.
Ridges/upr slopes....Variable 1 to 3 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY...
* Sky/Weather............Mostly cloudy. Areas of fog early in the
morning, then patchy fog late in the
morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...60-65
Ridges/upr slopes....59-66
* Min Humidity.......
Valleys/lwr slopes...78-91 percent
Ridges/upr slopes....78-88 percent
* 20-Foot Winds...
Valleys/lwr slopes...Light winds 1 to 3 mph...becoming west 5
mph in the afternoon.
Ridges/upr slopes....Variable 1 to 3 mph...becoming west 5 mph
in the afternoon.
* Mixing Height..........1700 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY NIGHT...
* Sky/Weather............Partly cloudy then becoming mostly cloudy.
Patchy fog in the evening, then areas of
fog after midnight.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...50-53
Ridges/upr slopes....47-52
* Max Humidity.......
Valleys/lwr slopes...95-100 percent
Ridges/upr slopes....94-100 percent
* 20-Foot Winds...
Valleys/lwr slopes...Light winds 1 to 3 mph.
Ridges/upr slopes....Variable 1 to 3 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ402-210115-
Interior Del Norte Including the Smith River Valley-
1208 AM PDT Thu Aug 20 2026
.TODAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...73-81
Ridges/upr slopes....71-79
* Min Humidity.......
Valleys/lwr slopes...73-83 percent
Ridges/upr slopes....68-78 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 8 mph.
Ridges/upr slopes....West winds 5 to 8 mph.
* Mixing Height..........2700 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Partly cloudy then becoming mostly cloudy.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...49-57
Ridges/upr slopes....54-62
* Max Humidity.......
Valleys/lwr slopes...75-90 percent
Ridges/upr slopes....64-79 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..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY...
* Sky/Weather............Mostly cloudy then becoming partly cloudy.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...67-75
Ridges/upr slopes....65-73
* Min Humidity.......
Valleys/lwr slopes...71-86 percent
Ridges/upr slopes....71-86 percent
* 20-Foot Winds...
Valleys/lwr slopes...Light winds 1 to 3 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..........2500 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY NIGHT...
* Sky/Weather............Mostly clear. Patchy fog in the late
evening and overnight.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...47-51
Ridges/upr slopes....50-54
* Max Humidity.......
Valleys/lwr slopes...88-100 percent
Ridges/upr slopes....72-87 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 6 mph in the
evening...becoming downslope/downvalley 1
to 3 mph.
Ridges/upr slopes....West winds 5 to 6 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ403-210115-
Northeastern Interior Humboldt and Southwestern Siskiyou
Including Orleans-
1208 AM PDT Thu Aug 20 2026
.TODAY...
* Sky/Weather............Sunny then becoming partly cloudy. Patchy
smoke late in the afternoon.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...91-99
Ridges/upr slopes....78-86
* Min Humidity.......
Valleys/lwr slopes...20-28 percent
Ridges/upr slopes....26-34 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 mph...shifting to the
southwest 5 to 8 mph in the afternoon.
Ridges/upr slopes....South winds 5 mph...shifting to the
southwest 5 to 8 mph in the afternoon.
* Mixing Height..........5600 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Partly cloudy then becoming mostly cloudy.
Patchy smoke early in the evening.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...57-64
Ridges/upr slopes....60-64
* Max Humidity.......
Valleys/lwr slopes...56-71 percent
Ridges/upr slopes....42-52 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southwest winds 5 to 6 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
Ridges/upr slopes....Southwest winds 5 to 6 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY...
* Sky/Weather............Mostly cloudy.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...84-92
Ridges/upr slopes....72-80
* Min Humidity.......
Valleys/lwr slopes...28-36 percent
Ridges/upr slopes....34-44 percent
* 20-Foot Winds...
Valleys/lwr slopes...Light winds 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 7 mph in the afternoon.
* Mixing Height..........4500 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY NIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...51-56
Ridges/upr slopes....52-55
* Max Humidity.......
Valleys/lwr slopes...76-91 percent
Ridges/upr slopes....55-70 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 7 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ404-210115-
Northern Coastal Humboldt-
1208 AM PDT Thu Aug 20 2026
.TODAY...
* Sky/Weather............Mostly cloudy. Patchy fog in the morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...61-68
Ridges/upr slopes....around 60
* Min Humidity.......
Valleys/lwr slopes...78-93 percent
Ridges/upr slopes....87 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 8 mph.
Ridges/upr slopes....Northwest winds 5 to 8 mph.
* Mixing Height..........1400 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Mostly cloudy. Patchy fog.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...52-55
Ridges/upr slopes....around 52
* Max Humidity.......
Valleys/lwr slopes...94-100 percent
Ridges/upr slopes....95 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 6 mph in the
evening...becoming light winds 2 to 4 mph.
Ridges/upr slopes....North winds 5 mph in the
evening...becoming light winds 1 to 3 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY...
* Sky/Weather............Cloudy then becoming partly cloudy. Patchy
fog in the morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...61-67
Ridges/upr slopes....around 60
* Min Humidity.......
Valleys/lwr slopes...76-91 percent
Ridges/upr slopes....85 percent
* 20-Foot Winds...
Valleys/lwr slopes...Light winds 2 to 4 mph...becoming
northwest 5 to 6 mph in the afternoon.
Ridges/upr slopes....Variable 1 to 3 mph.
* Mixing Height..........1800 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY NIGHT...
* Sky/Weather............Partly cloudy then becoming mostly cloudy.
Patchy fog through the night.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...51-54
Ridges/upr slopes....around 51
* Max Humidity.......
Valleys/lwr slopes...94-100 percent
Ridges/upr slopes....95 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 6 mph in the
evening...becoming light winds 1 to 3 mph.
Ridges/upr slopes....Variable 1 to 3 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ405-210115-
Northwestern Interior Humboldt Including the Bald Hills-
1208 AM PDT Thu Aug 20 2026
.TODAY...
* Sky/Weather............Partly cloudy then becoming sunny then
becoming partly cloudy. Patchy fog early
in the morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...71-79
Ridges/upr slopes....68-76
* Min Humidity.......
Valleys/lwr slopes...67-82 percent
Ridges/upr slopes....66-76 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 7 mph.
Ridges/upr slopes....Variable 2 to 4 mph...becoming west 5 to 6
mph in the afternoon.
* Mixing Height..........1500 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Partly cloudy then becoming mostly cloudy.
Patchy fog after midnight.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...51-57
Ridges/upr slopes....52-60
* Max Humidity.......
Valleys/lwr slopes...79-94 percent
Ridges/upr slopes....68-83 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 mph in the
evening...becoming light winds 1 to 3 mph.
Ridges/upr slopes....West winds 5 mph in the evening...becoming
light winds 2 to 4 mph.
* Mixing Height..........300 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY...
* Sky/Weather............Cloudy then becoming sunny. Patchy fog in
the morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...67-75
Ridges/upr slopes....63-71
* Min Humidity.......
Valleys/lwr slopes...70-85 percent
Ridges/upr slopes....66-81 percent
* 20-Foot Winds...
Valleys/lwr slopes...Light winds 1 to 3 mph...becoming west 5
mph in the afternoon.
Ridges/upr slopes....Variable 1 to 3 mph...becoming west 5 mph
in the afternoon.
* Mixing Height..........2000 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY NIGHT...
* Sky/Weather............Partly cloudy then becoming mostly cloudy.
Patchy fog in the late evening and early
morning. Areas of fog early in the
morning.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...49-53
Ridges/upr slopes....49-54
* Max Humidity.......
Valleys/lwr slopes...83-98 percent
Ridges/upr slopes....72-87 percent
* 20-Foot Winds...
Valleys/lwr slopes...Downslope/downvalley 1 to 3 mph.
Ridges/upr slopes....West winds 5 mph in the evening...becoming
downslope/downvalley 1 to 3 mph.
* Mixing Height..........300 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ406-210115-
Eastern Interior Humboldt Including Willow Creek and Hoopa-
1208 AM PDT Thu Aug 20 2026
.TODAY...
* Sky/Weather............Sunny then becoming partly cloudy. Patchy
smoke.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...89-97
Ridges/upr slopes....76-84
* Min Humidity.......
Valleys/lwr slopes...32-40 percent
Ridges/upr slopes....33-41 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 8 mph.
Ridges/upr slopes....Southeast winds 5 to 6 mph...shifting to
the west 5 to 8 mph in the afternoon.
* Mixing Height..........4200 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Partly cloudy then becoming mostly cloudy.
Patchy smoke in the evening.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...around 60
Ridges/upr slopes....59-64
* Max Humidity.......
Valleys/lwr slopes...64-79 percent
Ridges/upr slopes....47-57 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 7 mph in the
evening...becoming light winds 2 to 4 mph.
Ridges/upr slopes....West winds 5 to 7 mph...shifting to the
south 5 mph after midnight.
* Mixing Height..........300 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY...
* Sky/Weather............Cloudy then becoming partly cloudy.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...81-89
Ridges/upr slopes....69-77
* Min Humidity.......
Valleys/lwr slopes...39-49 percent
Ridges/upr slopes....41-51 percent
* 20-Foot Winds...
Valleys/lwr slopes...Light winds 1 to 3 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..........4400 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY NIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...52-55
Ridges/upr slopes....53-56
* Max Humidity.......
Valleys/lwr slopes...80-95 percent
Ridges/upr slopes....58-73 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 7 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..........300 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ407-210115-
Southwestern Humboldt Including the King Range and the Eel River
Valley-
1208 AM PDT Thu Aug 20 2026
.TODAY...
* Sky/Weather............Partly cloudy. Patchy fog early in the
morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...77-85
Ridges/upr slopes....66-74
* Min Humidity.......
Valleys/lwr slopes...51-61 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 8 mph.
* Mixing Height..........2000 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Mostly cloudy.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...52-57
Ridges/upr slopes....53-58
* Max Humidity.......
Valleys/lwr slopes...79-94 percent
Ridges/upr slopes....71-86 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 7 mph in the
evening...becoming light winds 2 to 4 mph.
Ridges/upr slopes....North winds 5 to 8 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY...
* Sky/Weather............Mostly cloudy then becoming sunny. Patchy
fog early in the morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...72-80
Ridges/upr slopes....63-71
* Min Humidity.......
Valleys/lwr slopes...55-65 percent
Ridges/upr slopes....66-81 percent
* 20-Foot Winds...
Valleys/lwr slopes...Light winds 2 to 4 mph...becoming west 5
to 6 mph in the afternoon.
Ridges/upr slopes....Variable 1 to 3 mph.
* Mixing Height..........2600 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY NIGHT...
* Sky/Weather............Mostly clear. Patchy fog after midnight.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...50-54
Ridges/upr slopes....51-55
* Max Humidity.......
Valleys/lwr slopes...84-99 percent
Ridges/upr slopes....75-90 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..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ408-210115-
Southeastern Interior Humboldt Including Kneeland and Alderpoint-
1208 AM PDT Thu Aug 20 2026
.TODAY...
* Sky/Weather............Partly cloudy then becoming mostly cloudy.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...77-85
Ridges/upr slopes....70-78
* Min Humidity.......
Valleys/lwr slopes...56-66 percent
Ridges/upr slopes....67-77 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 7 mph.
Ridges/upr slopes....West winds 5 to 7 mph.
* Mixing Height..........2800 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Mostly cloudy.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...53-58
Ridges/upr slopes....54-62
* Max Humidity.......
Valleys/lwr slopes...81-96 percent
Ridges/upr slopes....65-80 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 6 mph in the
evening...becoming light winds 2 to 4 mph.
Ridges/upr slopes....Northwest winds 5 to 6 mph in the
evening...becoming light winds 2 to 4 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY...
* Sky/Weather............Cloudy then becoming sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...72-80
Ridges/upr slopes....65-73
* Min Humidity.......
Valleys/lwr slopes...63-73 percent
Ridges/upr slopes....75-85 percent
* 20-Foot Winds...
Valleys/lwr slopes...Light winds 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..........3700 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY NIGHT...
* Sky/Weather............Mostly clear. Patchy fog in the late
evening and overnight.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...49-54
Ridges/upr slopes....47-54
* Max Humidity.......
Valleys/lwr slopes...88-100 percent
Ridges/upr slopes....73-88 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..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ409-210115-
Northwestern Trinity Including Salyer and Big Bar-
1208 AM PDT Thu Aug 20 2026
.TODAY...
* Sky/Weather............Sunny then becoming mostly cloudy.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...92-100
Ridges/upr slopes....77-85
* Min Humidity.......
Valleys/lwr slopes...17-25 percent
Ridges/upr slopes....18-26 percent
* 20-Foot Winds...
Valleys/lwr slopes...East winds 5 mph...shifting to the west 5
to 8 mph in the afternoon.
Ridges/upr slopes....South winds 5 to 8 mph.
* Mixing Height..........8700 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Mostly cloudy.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...57-63
Ridges/upr slopes....61-66
* Max Humidity.......
Valleys/lwr slopes...54-64 percent
Ridges/upr slopes....36-46 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 7 mph in the
evening...becoming light winds 2 to 4 mph.
Ridges/upr slopes....Southwest winds 5 to 7 mph...shifting to
the southeast 5 mph after midnight.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY...
* Sky/Weather............Cloudy. Slight chance of showers and
thunderstorms in the late morning and
afternoon.
* Chance Lightning.......10%.
* Max Temperature.......
Valleys/lwr slopes...85-93
Ridges/upr slopes....73-81
* Min Humidity.......
Valleys/lwr slopes...25-33 percent
Ridges/upr slopes....26-34 percent
* 20-Foot Winds...
Valleys/lwr slopes...Light winds 2 to 4 mph...becoming
southwest 5 to 6 mph in the afternoon.
Ridges/upr slopes....Southeast winds 5 to 8 mph...shifting to
the south 5 to 10 mph in the afternoon.
* Mixing Height..........8000 ft AGL.
* Chc of Wetting Rain....10 percent.
.FRIDAY NIGHT...
* Sky/Weather............Clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...52-56
Ridges/upr slopes....53-57
* Max Humidity.......
Valleys/lwr slopes...73-88 percent
Ridges/upr slopes....53-63 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 9 mph in the
evening...becoming downslope/downvalley 2
to 5 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ410-210115-
Northeastern Trinity Including Trinity Lake-
1208 AM PDT Thu Aug 20 2026
.TODAY...
* Sky/Weather............Partly cloudy then becoming mostly cloudy.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...87-95
Ridges/upr slopes....74-82
* Min Humidity.......
Valleys/lwr slopes...14-21 percent
Ridges/upr slopes....19-27 percent
* 20-Foot Winds...
Valleys/lwr slopes...East winds 5 to 6 mph...shifting to the
southeast in the afternoon.
Ridges/upr slopes....South winds 5 to 9 mph.
* Mixing Height..........7300 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Cloudy.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...59-66
Ridges/upr slopes....57-65
* Max Humidity.......
Valleys/lwr slopes...44-53 percent
Ridges/upr slopes....30-38 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southeast winds 5 to 6 mph in the
evening...becoming light winds 2 to 4 mph.
Ridges/upr slopes....Southeast winds 5 to 8 mph.
* Mixing Height..........500 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY...
* Sky/Weather............Cloudy. Slight chance of showers and
thunderstorms in the late morning and
afternoon.
* Chance Lightning.......10%.
* Max Temperature.......
Valleys/lwr slopes...83-91
Ridges/upr slopes....70-78
* Min Humidity.......
Valleys/lwr slopes...20-26 percent
Ridges/upr slopes....26-34 percent
* 20-Foot Winds...
Valleys/lwr slopes...Light winds 1 to 3 mph...becoming south 5
to 7 mph in the afternoon.
Ridges/upr slopes....Southeast winds 5 to 10 mph.
* Mixing Height..........7300 ft AGL.
* Chc of Wetting Rain....10 percent.
.FRIDAY NIGHT...
* Sky/Weather............Mostly cloudy then becoming mostly clear.
Slight chance of showers and thunderstorms
in the evening. Slight chance of rain in
the late evening and overnight.
* Chance Lightning.......10%.
* Min Temperature.......
Valleys/lwr slopes...56-59
Ridges/upr slopes....50-58
* Max Humidity.......
Valleys/lwr slopes...55-69 percent
Ridges/upr slopes....47-57 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 in the
evening...becoming downslope/downvalley 2
to 5 mph.
* Mixing Height..........500 ft AGL.
* Chc of Wetting Rain....10 percent.
$$
CAZ411-210115-
Eastern Trinity Including Weaverville and Hayfork-
1208 AM PDT Thu Aug 20 2026
.TODAY...
* Sky/Weather............Partly cloudy then becoming mostly cloudy.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...90-97
Ridges/upr slopes....79-87
* Min Humidity.......
Valleys/lwr slopes...14-19 percent
Ridges/upr slopes....18-26 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southeast winds 5 to 7 mph.
Ridges/upr slopes....Southeast winds 5 to 6 mph...shifting to
the south 5 to 7 mph in the afternoon.
* Mixing Height..........9100 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Mostly cloudy.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...56-64
Ridges/upr slopes....61-65
* Max Humidity.......
Valleys/lwr slopes...48-58 percent
Ridges/upr slopes....39-49 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southwest winds 5 to 6 mph in the
evening...becoming light winds 2 to 4 mph.
Ridges/upr slopes....Southwest winds 5 to 6 mph in the
evening...becoming light winds 2 to 4 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY...
* Sky/Weather............Cloudy.
* Chance Lightning.......10%.
* Max Temperature.......
Valleys/lwr slopes...86-93
Ridges/upr slopes....75-83
* Min Humidity.......
Valleys/lwr slopes...20-27 percent
Ridges/upr slopes....25-33 percent
* 20-Foot Winds...
Valleys/lwr slopes...Light winds 2 to 4 mph...becoming
southeast 5 to 6 mph in the afternoon.
Ridges/upr slopes....Variable 2 to 4 mph...becoming south 5 to
7 mph in the afternoon.
* Mixing Height..........7500 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY NIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......10%.
* Min Temperature.......
Valleys/lwr slopes...50-58
Ridges/upr slopes....52-57
* Max Humidity.......
Valleys/lwr slopes...63-78 percent
Ridges/upr slopes....53-68 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southwest winds 5 mph in the
evening...becoming downslope/downvalley 1
to 3 mph.
Ridges/upr slopes....West winds 5 to 7 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ412-210115-
Southern Trinity Including Ruth Lake and the Yolla Bollys-
1208 AM PDT Thu Aug 20 2026
.TODAY...
* Sky/Weather............Partly cloudy then becoming mostly cloudy.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...86-94
Ridges/upr slopes....78-86
* Min Humidity.......
Valleys/lwr slopes...25-33 percent
Ridges/upr slopes....22-30 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 8 mph.
Ridges/upr slopes....West winds 5 to 8 mph.
* Mixing Height..........7000 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Cloudy.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...57-61
Ridges/upr slopes....55-63
* Max Humidity.......
Valleys/lwr slopes...60-75 percent
Ridges/upr slopes....50-60 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 6 mph in the
evening...becoming light winds 2 to 4 mph.
Ridges/upr slopes....Southwest winds 5 to 6 mph in the
evening...becoming light winds 2 to 4 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY...
* Sky/Weather............Mostly cloudy.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...80-88
Ridges/upr slopes....72-80
* Min Humidity.......
Valleys/lwr slopes...34-42 percent
Ridges/upr slopes....31-39 percent
* 20-Foot Winds...
Valleys/lwr slopes...Light winds 2 to 4 mph...becoming
southwest 5 to 7 mph in the afternoon.
Ridges/upr slopes....South winds 5 mph...shifting to the
southwest 5 to 7 mph in the afternoon.
* Mixing Height..........5500 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY NIGHT...
* Sky/Weather............Clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...49-52
Ridges/upr slopes....47-55
* Max Humidity.......
Valleys/lwr slopes...77-92 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 1
to 3 mph.
Ridges/upr slopes....West winds 5 to 8 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ413-210115-
Coastal Mendocino-
1208 AM PDT Thu Aug 20 2026
.TODAY...
* Sky/Weather............Mostly cloudy. Areas of fog early in the
morning. Patchy fog late in the morning.
* 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....67-82 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 9 mph.
Ridges/upr slopes....West winds 5 to 10 mph.
* Mixing Height..........1200 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Cloudy. Patchy fog in the late evening and
early morning. Areas of fog early in the
morning.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...50-53
Ridges/upr slopes....48-55
* Max Humidity.......
Valleys/lwr slopes...91-100 percent
Ridges/upr slopes....84-99 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 9 mph.
Ridges/upr slopes....Northwest winds 5 to 9 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY...
* Sky/Weather............Mostly cloudy then becoming sunny. Patchy
fog in the morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...61-69
Ridges/upr slopes....62-70
* Min Humidity.......
Valleys/lwr slopes...78-93 percent
Ridges/upr slopes....70-85 percent
* 20-Foot Winds...
Valleys/lwr slopes...Light winds 2 to 4 mph...becoming
northwest 5 to 6 mph in the afternoon.
Ridges/upr slopes....Northwest winds 5 to 7 mph.
* Mixing Height..........1700 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY NIGHT...
* Sky/Weather............Partly cloudy then becoming mostly cloudy.
Patchy fog in the late evening and
overnight.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...49-52
Ridges/upr slopes....47-53
* Max Humidity.......
Valleys/lwr slopes...92-100 percent
Ridges/upr slopes....86-100 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 to 8 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ414-210115-
Northern Interior Mendocino Including Leggett and Willits-
1208 AM PDT Thu Aug 20 2026
.TODAY...
* Sky/Weather............Partly cloudy then becoming mostly cloudy.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...83-91
Ridges/upr slopes....76-84
* Min Humidity.......
Valleys/lwr slopes...37-45 percent
Ridges/upr slopes....47-57 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 8 mph.
Ridges/upr slopes....West winds 5 to 8 mph.
* Mixing Height..........3200 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Cloudy.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...51-59
Ridges/upr slopes....53-61
* Max Humidity.......
Valleys/lwr slopes...69-84 percent
Ridges/upr slopes....68-83 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 6 mph in the
evening...becoming light winds 2 to 4 mph.
Ridges/upr slopes....West winds 5 to 6 mph in the
evening...becoming light winds 2 to 4 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY...
* Sky/Weather............Cloudy then becoming partly cloudy.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...78-86
Ridges/upr slopes....71-79
* Min Humidity.......
Valleys/lwr slopes...43-53 percent
Ridges/upr slopes....51-61 percent
* 20-Foot Winds...
Valleys/lwr slopes...Light winds 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..........3000 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY NIGHT...
* Sky/Weather............Mostly clear. Patchy fog after midnight.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...46-53
Ridges/upr slopes....48-56
* Max Humidity.......
Valleys/lwr slopes...83-98 percent
Ridges/upr slopes....71-86 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..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ415-210115-
Northeastern Interior Mendocino Including Covelo-
1208 AM PDT Thu Aug 20 2026
.TODAY...
* Sky/Weather............Partly cloudy then becoming mostly cloudy.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...88-96
Ridges/upr slopes....78-86
* Min Humidity.......
Valleys/lwr slopes...21-26 percent
Ridges/upr slopes....21-29 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 8 mph.
Ridges/upr slopes....West winds 5 to 8 mph.
* Mixing Height..........6600 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Cloudy.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...57-65
Ridges/upr slopes....60-67
* Max Humidity.......
Valleys/lwr slopes...54-64 percent
Ridges/upr slopes....40-50 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southwest winds 5 to 6 mph in the
evening...becoming light winds 2 to 4 mph.
Ridges/upr slopes....West winds 5 to 7 mph in the
evening...becoming light winds 2 to 4 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY...
* Sky/Weather............Mostly cloudy.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...83-91
Ridges/upr slopes....73-81
* Min Humidity.......
Valleys/lwr slopes...28-33 percent
Ridges/upr slopes....29-37 percent
* 20-Foot Winds...
Valleys/lwr slopes...Light winds 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 7 mph in the afternoon.
* Mixing Height..........4800 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY NIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...50-58
Ridges/upr slopes....52-58
* Max Humidity.......
Valleys/lwr slopes...70-85 percent
Ridges/upr slopes....55-70 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 7 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..........300 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ416-210115-
Southeastern Interior Mendocino Including Ukiah and Potter Valley-
1208 AM PDT Thu Aug 20 2026
.TODAY...
* Sky/Weather............Mostly cloudy.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...85-93
Ridges/upr slopes....79-87
* Min Humidity.......
Valleys/lwr slopes...29-37 percent
Ridges/upr slopes....34-42 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 8 mph.
Ridges/upr slopes....West winds 5 to 9 mph.
* Mixing Height..........3900 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Cloudy.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...53-61
Ridges/upr slopes....61-69
* Max Humidity.......
Valleys/lwr slopes...61-76 percent
Ridges/upr slopes....53-63 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 8 mph.
Ridges/upr slopes....Northwest winds 5 to 8 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY...
* Sky/Weather............Cloudy then becoming partly cloudy.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...80-88
Ridges/upr slopes....74-81
* Min Humidity.......
Valleys/lwr slopes...36-46 percent
Ridges/upr slopes....39-49 percent
* 20-Foot Winds...
Valleys/lwr slopes...Light winds 2 to 4 mph...becoming west 5
to 6 mph in the afternoon.
Ridges/upr slopes....West winds 5 to 8 mph.
* Mixing Height..........3200 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY NIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...49-56
Ridges/upr slopes....53-60
* Max Humidity.......
Valleys/lwr slopes...75-90 percent
Ridges/upr slopes....60-75 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 8 mph.
Ridges/upr slopes....Northwest winds 5 to 8 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ417-210115-
Southwestern Interior Mendocino Including Boonville-
1208 AM PDT Thu Aug 20 2026
.TODAY...
* Sky/Weather............Mostly cloudy. Patchy fog early in the
morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...76-84
Ridges/upr slopes....73-81
* Min Humidity.......
Valleys/lwr slopes...55-65 percent
Ridges/upr slopes....56-66 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 8 mph.
Ridges/upr slopes....Northwest winds 5 to 8 mph.
* Mixing Height..........1900 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Cloudy. Patchy fog early in the morning.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...52-58
Ridges/upr slopes....52-60
* Max Humidity.......
Valleys/lwr slopes...79-94 percent
Ridges/upr slopes....71-86 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 8 mph.
Ridges/upr slopes....Northwest winds 5 to 8 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY...
* Sky/Weather............Cloudy then becoming partly cloudy. Patchy
fog early in the morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...72-80
Ridges/upr slopes....69-77
* Min Humidity.......
Valleys/lwr slopes...58-68 percent
Ridges/upr slopes....60-70 percent
* 20-Foot Winds...
Valleys/lwr slopes...Light winds 2 to 4 mph...becoming
northwest 5 to 6 mph in the afternoon.
Ridges/upr slopes....Northwest winds 5 to 7 mph.
* Mixing Height..........2300 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY NIGHT...
* Sky/Weather............Partly cloudy. Patchy fog early in the
morning.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...50-54
Ridges/upr slopes....50-55
* Max Humidity.......
Valleys/lwr slopes...82-97 percent
Ridges/upr slopes....76-91 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 7 mph.
Ridges/upr slopes....Northwest winds 5 to 8 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ418-210115-
Northern Lake Including Gravelly Valley-
1208 AM PDT Thu Aug 20 2026
.TODAY...
* Sky/Weather............Mostly cloudy.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...93-99
Ridges/upr slopes....79-87
* Min Humidity.......
Valleys/lwr slopes...16-24 percent
Ridges/upr slopes....21-28 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southwest winds 5 to 8 mph.
Ridges/upr slopes....Southwest winds 5 to 8 mph.
* Mixing Height..........5900 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Mostly cloudy.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...58-66
Ridges/upr slopes....63-70
* Max Humidity.......
Valleys/lwr slopes...46-56 percent
Ridges/upr slopes....33-43 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 8 mph.
Ridges/upr slopes....West winds 5 to 8 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY...
* Sky/Weather............Mostly cloudy.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...88-94
Ridges/upr slopes....75-83
* Min Humidity.......
Valleys/lwr slopes...22-30 percent
Ridges/upr slopes....25-33 percent
* 20-Foot Winds...
Valleys/lwr slopes...Light winds 2 to 4 mph...becoming
southwest 5 to 8 mph in the afternoon.
Ridges/upr slopes....Variable 2 to 5 mph...becoming southwest 5
to 8 mph in the afternoon.
* Mixing Height..........5200 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY NIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...51-59
Ridges/upr slopes....55-61
* Max Humidity.......
Valleys/lwr slopes...57-72 percent
Ridges/upr slopes....46-56 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 8 mph.
Ridges/upr slopes....West winds 5 to 8 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ419-210115-
Eastern Lake Including Clearlake and Middletown-
1208 AM PDT Thu Aug 20 2026
.TODAY...
* Sky/Weather............Mostly cloudy.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...92-97
Ridges/upr slopes....86-91
* Min Humidity.......
Valleys/lwr slopes...21-29 percent
Ridges/upr slopes....21-29 percent
* 20-Foot Winds...
Valleys/lwr slopes...South 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.
.TONIGHT...
* Sky/Weather............Mostly cloudy.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...57-65
Ridges/upr slopes....62-70
* Max Humidity.......
Valleys/lwr slopes...54-69 percent
Ridges/upr slopes....46-56 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 8 mph.
Ridges/upr slopes....West winds 5 to 8 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY...
* Sky/Weather............Mostly cloudy.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...89-93
Ridges/upr slopes....83-88
* Min Humidity.......
Valleys/lwr slopes...23-31 percent
Ridges/upr slopes....26-34 percent
* 20-Foot Winds...
Valleys/lwr slopes...Light winds 2 to 4 mph...becoming
southwest 5 to 8 mph in the afternoon.
Ridges/upr slopes....Southwest winds 5 to 8 mph.
* Mixing Height..........5700 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY NIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...52-59
Ridges/upr slopes....55-63
* Max Humidity.......
Valleys/lwr slopes...64-79 percent
Ridges/upr slopes....56-71 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 9 mph.
Ridges/upr slopes....West winds 5 to 9 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ420-210115-
Southern Lake Including Cobb and Konocti-
1208 AM PDT Thu Aug 20 2026
.TODAY...
* Sky/Weather............Mostly cloudy.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...89-94
Ridges/upr slopes....81-88
* Min Humidity.......
Valleys/lwr slopes...27-35 percent
Ridges/upr slopes....32-40 percent
* 20-Foot Winds...
Valleys/lwr slopes...Light winds 2 to 5 mph...becoming
southwest 5 to 9 mph in the afternoon.
Ridges/upr slopes....Northwest winds 5 mph...shifting to the
southwest 5 to 8 mph in the afternoon.
* Mixing Height..........5100 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Mostly cloudy.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...58-66
Ridges/upr slopes....65-71
* Max Humidity.......
Valleys/lwr slopes...49-57 percent
Ridges/upr slopes....41-51 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 9 mph in the
evening...becoming light winds 2 to 5 mph.
Ridges/upr slopes....West winds 5 to 8 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY...
* Sky/Weather............Mostly cloudy.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...84-91
Ridges/upr slopes....77-85
* Min Humidity.......
Valleys/lwr slopes...29-37 percent
Ridges/upr slopes....32-40 percent
* 20-Foot Winds...
Valleys/lwr slopes...Light winds 2 to 4 mph...becoming
southwest 5 to 8 mph in the afternoon.
Ridges/upr slopes....Variable 2 to 5 mph...becoming southwest 5
to 8 mph in the afternoon.
* Mixing Height..........4500 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY NIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...53-59
Ridges/upr slopes....59-63
* Max Humidity.......
Valleys/lwr slopes...59-71 percent
Ridges/upr slopes....50-60 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 8 mph.
Ridges/upr slopes....West winds 5 to 8 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ421-210115-
Western Lake Including Lakeport-
1208 AM PDT Thu Aug 20 2026
.TODAY...
* Sky/Weather............Mostly cloudy.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...87-93
Ridges/upr slopes....83-88
* Min Humidity.......
Valleys/lwr slopes...27-35 percent
Ridges/upr slopes....25-32 percent
* 20-Foot Winds...
Valleys/lwr slopes...Light winds 2 to 4 mph...becoming
southwest 5 to 7 mph in the afternoon.
Ridges/upr slopes....West winds 5 to 8 mph.
* Mixing Height..........5600 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Mostly cloudy.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...56-63
Ridges/upr slopes....60-68
* Max Humidity.......
Valleys/lwr slopes...57-72 percent
Ridges/upr slopes....44-54 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 7 mph in the
evening...becoming light winds 2 to 4 mph.
Ridges/upr slopes....Northwest winds 5 to 8 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY...
* Sky/Weather............Mostly cloudy.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...83-88
Ridges/upr slopes....77-82
* Min Humidity.......
Valleys/lwr slopes...31-41 percent
Ridges/upr slopes....33-40 percent
* 20-Foot Winds...
Valleys/lwr slopes...Light winds 2 to 4 mph...becoming west 5
to 7 mph in the afternoon.
Ridges/upr slopes....West winds 5 to 8 mph.
* Mixing Height..........4300 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY NIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...50-57
Ridges/upr slopes....53-61
* Max Humidity.......
Valleys/lwr slopes...70-85 percent
Ridges/upr slopes....57-72 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 8 mph.
Ridges/upr slopes....Northwest winds 5 to 9 mph.
* Mixing Height..........500 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
.EXTENDED FORECAST FOR DAYS 3 THROUGH 5...
...Northwest California Coast...
.SATURDAY...Mostly cloudy. Patchy fog in the morning. Patchy fog
after midnight. Lows in the lower to mid 50s. Highs 60 to 67.
North winds 5 mph.
.SUNDAY...Partly cloudy. Patchy fog in the morning. Patchy fog
after midnight. Lows in the lower to mid 50s. Highs 64 to 71.
North winds 5 mph.
.MONDAY...Mostly cloudy. Patchy fog in the morning. Patchy fog.
Lows in the lower to mid 50s. Highs 63 to 69. Winds generally
less than 5 mph.
...Northwest California Interior...
.SATURDAY...Mostly clear. Lows 52 to 60. Highs 77 to 90.
Northwest winds 5 mph.
.SUNDAY...Mostly clear. Lows 55 to 63. Highs 83 to 93. Northwest
winds 5 mph.
.MONDAY...Mostly clear. Lows 53 to 61. Highs 82 to 93. Southwest
winds 5 mph.
.6 to 10 DAY OUTLOOK...Tuesday August 25 THROUGH Saturday August 29, 2026...
FOR NW CALIF...ABOVE NORMAL TEMPERATURES AND NEAR NORMAL PRECIPITATION.
$$
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