Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Eureka, CA
Issued by NWS Eureka, CA
325
FNUS56 KEKA 170708
FWFEKA
FIRE WEATHER PLANNING FORECAST FOR NORTHWEST CALIFORNIA
NATIONAL WEATHER SERVICE Eureka CA
1208 AM PDT Thu Sep 17 2026
...SLIGHT CHANCE FOR THUNDERSTORMS AROUND THE TRINITY ALPS THURSDAY...
.DISCUSSION...There will be another round of potential
storms for the Trinity Alps Thursday afternoon. Otherwise, fire
weather conditions will be moderate with weak terrain winds,
moderate RH and good overnight recoveries. Conditions will
significantly warm and dry this weekend with much more restricted
marine influence.
CAZ401-180115-
Coastal Del Norte-
1208 AM PDT Thu Sep 17 2026
.TODAY...
* Sky/Weather............Mostly cloudy. Patchy fog early in the
morning.
* Chance Lightning.......10%.
* Max Temperature.......
Valleys/lwr slopes...63-67
Ridges/upr slopes....62-67
* Min Humidity.......
Valleys/lwr slopes...72-85 percent
Ridges/upr slopes....72-82 percent
* 20-Foot Winds...
Valleys/lwr slopes...South winds 5 to 7 mph.
Ridges/upr slopes....South winds 5 to 7 mph.
* Mixing Height..........1700 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Mostly cloudy. Patchy fog.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...51-54
Ridges/upr slopes....50-53
* Max Humidity.......
Valleys/lwr slopes...93-100 percent
Ridges/upr slopes....91-100 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southeast winds 5 mph in the
evening...becoming light winds 1 to 3 mph.
Ridges/upr slopes....Variable 1 to 3 mph.
* Mixing Height..........800 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY...
* Sky/Weather............Mostly cloudy then becoming partly cloudy.
Patchy fog in the morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...63-68
Ridges/upr slopes....63-67
* Min Humidity.......
Valleys/lwr slopes...71-85 percent
Ridges/upr slopes....71-81 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 2 to 4 mph...becoming northwest 5
to 7 mph in the afternoon.
* Mixing Height..........1600 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...50-53
Ridges/upr slopes....50-53
* Max Humidity.......
Valleys/lwr slopes...91-100 percent
Ridges/upr slopes....89-100 percent
* 20-Foot Winds...
Valleys/lwr slopes...North winds 5 to 6 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
Ridges/upr slopes....North winds 5 to 6 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
* Mixing Height..........700 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ402-180115-
Interior Del Norte Including the Smith River Valley-
1208 AM PDT Thu Sep 17 2026
.TODAY...
* Sky/Weather............Partly cloudy. Slight chance of rain late
in the morning. Slight chance of showers
and isolated thunderstorms in the
afternoon.
* Chance Lightning.......10%.
* Max Temperature.......
Valleys/lwr slopes...67-75
Ridges/upr slopes....60-68
* Min Humidity.......
Valleys/lwr slopes...63-78 percent
Ridges/upr slopes....60-75 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southwest winds 5 to 7 mph.
Ridges/upr slopes....Variable 2 to 4 mph...becoming west 5 to 6
mph in the afternoon.
* Mixing Height..........2900 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...50-53
Ridges/upr slopes....49-53
* Max Humidity.......
Valleys/lwr slopes...83-98 percent
Ridges/upr slopes....73-88 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 2 to 4 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...69-77
Ridges/upr slopes....62-70
* Min Humidity.......
Valleys/lwr slopes...66-76 percent
Ridges/upr slopes....65-75 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 1 to 3 mph...becoming
west 5 mph in the afternoon.
Ridges/upr slopes....Variable 2 to 4 mph...becoming west 5 mph
in the afternoon.
* 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...50-54
Ridges/upr slopes....49-54
* Max Humidity.......
Valleys/lwr slopes...78-93 percent
Ridges/upr slopes....67-82 percent
* 20-Foot Winds...
Valleys/lwr slopes...Downslope/downvalley 1 to 3 mph.
Ridges/upr slopes....Northwest winds 5 mph...shifting to the
northeast after midnight.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ403-180115-
Northeastern Interior Humboldt and Southwestern Siskiyou
Including Orleans-
1208 AM PDT Thu Sep 17 2026
.TODAY...
* Sky/Weather............Partly cloudy. Slight chance of showers
through the day. Isolated thunderstorms in
the afternoon.
* Chance Lightning.......10%.
* Max Temperature.......
Valleys/lwr slopes...76-84
Ridges/upr slopes....61-69
* Min Humidity.......
Valleys/lwr slopes...32-39 percent
Ridges/upr slopes....40-50 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 1 to 3 mph...becoming
west 5 mph in the afternoon.
Ridges/upr slopes....North winds 5 mph...shifting to the west 5
to 6 mph in the afternoon.
* Mixing Height..........5900 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...51-54
Ridges/upr slopes....48-52
* Max Humidity.......
Valleys/lwr slopes...75-90 percent
Ridges/upr slopes....64-74 percent
* 20-Foot Winds...
Valleys/lwr slopes...Downslope/downvalley 1 to 3 mph.
Ridges/upr slopes....Variable 2 to 4 mph...becoming northeast 5
mph after midnight.
* Mixing Height..........300 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...80-88
Ridges/upr slopes....67-75
* Min Humidity.......
Valleys/lwr slopes...27-35 percent
Ridges/upr slopes....36-46 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
west 5 mph in the afternoon.
Ridges/upr slopes....Northeast winds 5 mph...shifting to the
west 5 to 6 mph in the afternoon.
* Mixing Height..........6100 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY NIGHT...
* Sky/Weather............Clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...50-55
Ridges/upr slopes....50-53
* Max Humidity.......
Valleys/lwr slopes...62-77 percent
Ridges/upr slopes....53-63 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 mph...shifting to the
northeast after midnight.
Ridges/upr slopes....Northwest winds 5 to 6 mph...shifting to
the northeast after midnight.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ404-180115-
Northern Coastal Humboldt-
1208 AM PDT Thu Sep 17 2026
.TODAY...
* Sky/Weather............Partly cloudy. Patchy fog in the morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...66-72
Ridges/upr slopes....around 67
* Min Humidity.......
Valleys/lwr slopes...65-80 percent
Ridges/upr slopes....67 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....Variable 1 to 3 mph.
* Mixing Height..........2700 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Mostly cloudy. Patchy fog.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...51-54
Ridges/upr slopes....around 53
* Max Humidity.......
Valleys/lwr slopes...94-100 percent
Ridges/upr slopes....94 percent
* 20-Foot Winds...
Valleys/lwr slopes...South winds 5 to 6 mph in the
evening...becoming light winds 2 to 4 mph.
Ridges/upr slopes....Variable 1 to 3 mph.
* Mixing Height..........800 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY...
* Sky/Weather............Mostly cloudy then becoming partly cloudy.
Patchy fog in the morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...63-69
Ridges/upr slopes....around 61
* Min Humidity.......
Valleys/lwr slopes...72-87 percent
Ridges/upr slopes....83 percent
* 20-Foot Winds...
Valleys/lwr slopes...Light winds 2 to 5 mph...becoming
northwest 5 to 8 mph in the afternoon.
Ridges/upr slopes....Variable 2 to 4 mph...becoming north 5 to
6 mph in the afternoon.
* Mixing Height..........1800 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...49-53
Ridges/upr slopes....around 51
* Max Humidity.......
Valleys/lwr slopes...93-100 percent
Ridges/upr slopes....95 percent
* 20-Foot Winds...
Valleys/lwr slopes...North 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..........800 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ405-180115-
Northwestern Interior Humboldt Including the Bald Hills-
1208 AM PDT Thu Sep 17 2026
.TODAY...
* Sky/Weather............Sunny then becoming partly cloudy.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...68-76
Ridges/upr slopes....63-71
* Min Humidity.......
Valleys/lwr slopes...65-75 percent
Ridges/upr slopes....63-73 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
west 5 mph in the afternoon.
Ridges/upr slopes....Southeast winds 5 to 6 mph...shifting to
the west 5 mph in the afternoon.
* Mixing Height..........2900 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Partly cloudy.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...49-54
Ridges/upr slopes....49-53
* Max Humidity.......
Valleys/lwr slopes...82-97 percent
Ridges/upr slopes....74-89 percent
* 20-Foot Winds...
Valleys/lwr slopes...Downslope/downvalley 1 to 3 mph.
Ridges/upr slopes....Variable 1 to 3 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...68-76
Ridges/upr slopes....63-71
* Min Humidity.......
Valleys/lwr slopes...62-77 percent
Ridges/upr slopes....60-75 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
west 5 to 6 mph in the afternoon.
Ridges/upr slopes....Variable 2 to 4 mph...becoming northwest 5
mph in the afternoon.
* Mixing Height..........2200 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...48-54
Ridges/upr slopes....48-53
* Max Humidity.......
Valleys/lwr slopes...81-96 percent
Ridges/upr slopes....70-85 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 mph in the
evening...becoming downslope/downvalley 1
to 3 mph.
Ridges/upr slopes....Northwest winds 5 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ406-180115-
Eastern Interior Humboldt Including Willow Creek and Hoopa-
1208 AM PDT Thu Sep 17 2026
.TODAY...
* Sky/Weather............Sunny. Slight chance of rain early in the
afternoon. Slight chance of showers and
isolated thunderstorms late in the
afternoon.
* Chance Lightning.......10%.
* Max Temperature.......
Valleys/lwr slopes...76-84
Ridges/upr slopes....61-69
* Min Humidity.......
Valleys/lwr slopes...36-46 percent
Ridges/upr slopes....40-50 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
northwest 5 to 6 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..........5300 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...50-53
Ridges/upr slopes....48-52
* Max Humidity.......
Valleys/lwr slopes...77-92 percent
Ridges/upr slopes....62-75 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..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...78-86
Ridges/upr slopes....64-72
* Min Humidity.......
Valleys/lwr slopes...35-45 percent
Ridges/upr slopes....42-52 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
northwest 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..........4100 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY NIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...48-53
Ridges/upr slopes....50-53
* Max Humidity.......
Valleys/lwr slopes...71-86 percent
Ridges/upr slopes....55-69 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 6 mph...shifting to
the northeast 5 mph after midnight.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ407-180115-
Southwestern Humboldt Including the King Range and the Eel River
Valley-
1208 AM PDT Thu Sep 17 2026
.TODAY...
* Sky/Weather............Partly cloudy then becoming sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...69-77
Ridges/upr slopes....63-69
* Min Humidity.......
Valleys/lwr slopes...50-60 percent
Ridges/upr slopes....58-73 percent
* 20-Foot Winds...
Valleys/lwr slopes...South winds 5 to 7 mph.
Ridges/upr slopes....South winds 5 to 7 mph.
* Mixing Height..........2900 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Partly cloudy. Patchy fog in the late
evening and overnight.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...49-53
Ridges/upr slopes....51-54
* Max Humidity.......
Valleys/lwr slopes...86-100 percent
Ridges/upr slopes....80-95 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 mph in the evening...becoming
downslope/downvalley 1 to 3 mph.
Ridges/upr slopes....Variable 1 to 3 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY...
* Sky/Weather............Partly cloudy then becoming sunny. Patchy
fog in the morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...74-82
Ridges/upr slopes....64-72
* Min Humidity.......
Valleys/lwr slopes...48-58 percent
Ridges/upr slopes....66-81 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
northwest 5 to 6 mph in the afternoon.
Ridges/upr slopes....North winds 5 to 8 mph.
* Mixing Height..........2700 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY NIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...47-52
Ridges/upr slopes....48-52
* Max Humidity.......
Valleys/lwr slopes...82-97 percent
Ridges/upr slopes....75-90 percent
* 20-Foot Winds...
Valleys/lwr slopes...North 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.
$$
CAZ408-180115-
Southeastern Interior Humboldt Including Kneeland and Alderpoint-
1208 AM PDT Thu Sep 17 2026
.TODAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...70-78
Ridges/upr slopes....63-70
* Min Humidity.......
Valleys/lwr slopes...53-63 percent
Ridges/upr slopes....58-68 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
west 5 to 6 mph in the afternoon.
Ridges/upr slopes....Southeast winds 5 to 6 mph...shifting to
the west in the afternoon.
* Mixing Height..........4800 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Mostly clear. Patchy fog in the late
evening and overnight.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...51-54
Ridges/upr slopes....46-53
* Max Humidity.......
Valleys/lwr slopes...83-98 percent
Ridges/upr slopes....74-89 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....North winds 5 to 6 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY...
* Sky/Weather............Sunny. Patchy fog early in the morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...72-80
Ridges/upr slopes....65-72
* Min Humidity.......
Valleys/lwr slopes...57-67 percent
Ridges/upr slopes....69-79 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
northwest 5 to 7 mph in the afternoon.
Ridges/upr slopes....Variable 2 to 4 mph...becoming northwest 5
to 6 mph in the afternoon.
* Mixing Height..........3600 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY NIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...50-53
Ridges/upr slopes....46-52
* Max Humidity.......
Valleys/lwr slopes...79-94 percent
Ridges/upr slopes....66-81 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 in the
evening...becoming downslope/downvalley 2
to 4 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ409-180115-
Northwestern Trinity Including Salyer and Big Bar-
1208 AM PDT Thu Sep 17 2026
.TODAY...
* Sky/Weather............Sunny then becoming partly cloudy. Slight
chance of rain late in the morning. Slight
chance of showers and isolated
thunderstorms in the afternoon.
* Chance Lightning.......10%.
* Max Temperature.......
Valleys/lwr slopes...75-83
Ridges/upr slopes....59-67
* Min Humidity.......
Valleys/lwr slopes...28-36 percent
Ridges/upr slopes....43-53 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
west 5 to 6 mph in the afternoon.
Ridges/upr slopes....Southeast winds 5 mph...shifting to the
southwest in the afternoon.
* Mixing Height..........6900 ft AGL.
* Chc of Wetting Rain....10 percent.
.TONIGHT...
* Sky/Weather............Mostly clear. Slight chance of showers and
isolated thunderstorms early in the
evening. Slight chance of rain late in the
evening.
* Chance Lightning.......10%.
* Min Temperature.......
Valleys/lwr slopes...49-52
Ridges/upr slopes....46-51
* Max Humidity.......
Valleys/lwr slopes...76-91 percent
Ridges/upr slopes....63-76 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....North winds 5 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...79-87
Ridges/upr slopes....66-74
* Min Humidity.......
Valleys/lwr slopes...26-34 percent
Ridges/upr slopes....29-37 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 1 to 3 mph...becoming
northwest 5 to 6 mph in the afternoon.
Ridges/upr slopes....Variable 2 to 4 mph...becoming west 5 to 7
mph in the afternoon.
* Mixing Height..........6100 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY NIGHT...
* Sky/Weather............Clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...48-54
Ridges/upr slopes....49-55
* 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 downslope/downvalley 2
to 4 mph.
Ridges/upr slopes....Northwest winds 5 to 7 mph...shifting to
the northeast 5 mph after midnight.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ410-180115-
Northeastern Trinity Including Trinity Lake-
1208 AM PDT Thu Sep 17 2026
.TODAY...
* Sky/Weather............Sunny then becoming partly cloudy then
becoming mostly cloudy. Chance of rain
late in the morning. Chance of showers and
isolated thunderstorms in the afternoon.
* Chance Lightning.......10%.
* Max Temperature.......
Valleys/lwr slopes...67-75
Ridges/upr slopes....55-63
* Min Humidity.......
Valleys/lwr slopes...39-49 percent
Ridges/upr slopes....53-63 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 1 to 3 mph...becoming
southeast 5 mph in the afternoon.
Ridges/upr slopes....Variable 2 to 4 mph...becoming southwest 5
mph in the afternoon.
* Mixing Height..........5700 ft AGL.
* Chc of Wetting Rain....10 percent.
.TONIGHT...
* Sky/Weather............Mostly cloudy then becoming mostly clear.
Chance of showers and isolated
thunderstorms early in the evening, then
chance of rain late in the evening.
* Chance Lightning.......10%.
* Min Temperature.......
Valleys/lwr slopes...48-52
Ridges/upr slopes....41-49
* Max Humidity.......
Valleys/lwr slopes...76-91 percent
Ridges/upr slopes....69-84 percent
* 20-Foot Winds...
Valleys/lwr slopes...Downslope/downvalley 1 to 3 mph.
Ridges/upr slopes....Northwest winds 5 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....10 percent.
.FRIDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...78-86
Ridges/upr slopes....64-72
* Min Humidity.......
Valleys/lwr slopes...21-26 percent
Ridges/upr slopes....27-35 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 1 to 3 mph.
Ridges/upr slopes....Northwest winds 5 to 7 mph.
* Mixing Height..........8500 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY NIGHT...
* Sky/Weather............Clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...51-55
Ridges/upr slopes....45-53
* Max Humidity.......
Valleys/lwr slopes...54-67 percent
Ridges/upr slopes....44-54 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 8 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ411-180115-
Eastern Trinity Including Weaverville and Hayfork-
1208 AM PDT Thu Sep 17 2026
.TODAY...
* Sky/Weather............Sunny then becoming partly cloudy. Slight
chance of rain late in the morning. Slight
chance of showers and isolated
thunderstorms in the afternoon.
* Chance Lightning.......10%.
* Max Temperature.......
Valleys/lwr slopes...71-78
Ridges/upr slopes....62-70
* Min Humidity.......
Valleys/lwr slopes...31-39 percent
Ridges/upr slopes....39-49 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..........6800 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Partly cloudy then becoming mostly clear.
Slight chance of showers and isolated
thunderstorms early in the evening, then
slight chance of rain late in the evening.
* Chance Lightning.......10%.
* Min Temperature.......
Valleys/lwr slopes...45-50
Ridges/upr slopes....around 50
* Max Humidity.......
Valleys/lwr slopes...76-91 percent
Ridges/upr slopes....68-80 percent
* 20-Foot Winds...
Valleys/lwr slopes...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..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...81-87
Ridges/upr slopes....70-78
* Min Humidity.......
Valleys/lwr slopes...21-27 percent
Ridges/upr slopes....24-31 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 1 to 3 mph...becoming
west 5 to 6 mph in the afternoon.
Ridges/upr slopes....Variable 2 to 4 mph...becoming northwest 5
to 6 mph in the afternoon.
* Mixing Height..........7300 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY NIGHT...
* Sky/Weather............Clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...47-53
Ridges/upr slopes....49-54
* Max Humidity.......
Valleys/lwr slopes...56-71 percent
Ridges/upr slopes....50-60 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 8 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
Ridges/upr slopes....Northwest winds 5 to 8 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ412-180115-
Southern Trinity Including Ruth Lake and the Yolla Bollys-
1208 AM PDT Thu Sep 17 2026
.TODAY...
* Sky/Weather............Sunny then becoming partly cloudy. Slight
chance of rain in the late morning and
early afternoon. Slight chance of showers
and isolated thunderstorms late in the
afternoon.
* Chance Lightning.......10%.
* Max Temperature.......
Valleys/lwr slopes...72-80
Ridges/upr slopes....62-70
* Min Humidity.......
Valleys/lwr slopes...38-48 percent
Ridges/upr slopes....41-51 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
west 5 to 6 mph in the afternoon.
Ridges/upr slopes....East winds 5 to 6 mph...shifting to the
west in the afternoon.
* Mixing Height..........6700 ft AGL.
* Chc of Wetting Rain....10 percent.
.TONIGHT...
* Sky/Weather............Mostly clear. Slight chance of showers and
isolated thunderstorms early in the
evening. Slight chance of rain late in the
evening.
* Chance Lightning.......10%.
* Min Temperature.......
Valleys/lwr slopes...46-52
Ridges/upr slopes....44-50
* Max Humidity.......
Valleys/lwr slopes...81-96 percent
Ridges/upr slopes....78-93 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 6 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...77-85
Ridges/upr slopes....69-77
* Min Humidity.......
Valleys/lwr slopes...30-38 percent
Ridges/upr slopes....31-39 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
west 5 to 6 mph in the afternoon.
Ridges/upr slopes....Variable 2 to 4 mph...becoming west 5 to 7
mph in the afternoon.
* Mixing Height..........5800 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY NIGHT...
* Sky/Weather............Clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...48-54
Ridges/upr slopes....46-54
* Max Humidity.......
Valleys/lwr slopes...62-77 percent
Ridges/upr slopes....57-72 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 in the
evening...becoming downslope/downvalley 2
to 4 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ413-180115-
Coastal Mendocino-
1208 AM PDT Thu Sep 17 2026
.TODAY...
* Sky/Weather............Mostly cloudy then becoming partly cloudy.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...64-72
Ridges/upr slopes....61-69
* Min Humidity.......
Valleys/lwr slopes...66-81 percent
Ridges/upr slopes....68-83 percent
* 20-Foot Winds...
Valleys/lwr slopes...South winds 5 to 8 mph.
Ridges/upr slopes....South winds 5 to 8 mph.
* Mixing Height..........2400 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Partly cloudy then becoming mostly cloudy.
Patchy fog.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...50-53
Ridges/upr slopes....46-53
* Max Humidity.......
Valleys/lwr slopes...92-100 percent
Ridges/upr slopes....87-100 percent
* 20-Foot Winds...
Valleys/lwr slopes...East winds 5 mph in the evening...becoming
downslope/downvalley 2 to 4 mph.
Ridges/upr slopes....Variable 2 to 4 mph...becoming north 5 mph
after midnight.
* 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...65-73
Ridges/upr slopes....65-72
* Min Humidity.......
Valleys/lwr slopes...65-80 percent
Ridges/upr slopes....60-75 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 5 mph...becoming
northwest 5 to 8 mph in the afternoon.
Ridges/upr slopes....Variable 2 to 5 mph...becoming west 5 to
10 mph in the afternoon.
* Mixing Height..........1600 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY NIGHT...
* Sky/Weather............Partly cloudy. Patchy fog in the late
evening and overnight.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...48-53
Ridges/upr slopes....46-54
* Max Humidity.......
Valleys/lwr slopes...83-98 percent
Ridges/upr slopes....78-93 percent
* 20-Foot Winds...
Valleys/lwr slopes...North 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.
$$
CAZ414-180115-
Northern Interior Mendocino Including Leggett and Willits-
1208 AM PDT Thu Sep 17 2026
.TODAY...
* Sky/Weather............Partly cloudy then becoming sunny. Patchy
fog early in the morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...70-78
Ridges/upr slopes....64-71
* Min Humidity.......
Valleys/lwr slopes...47-57 percent
Ridges/upr slopes....58-68 percent
* 20-Foot Winds...
Valleys/lwr slopes...South winds 5 to 7 mph.
Ridges/upr slopes....South winds 5 to 7 mph.
* Mixing Height..........4400 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Mostly clear. Patchy fog in the late
evening and early morning.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...44-52
Ridges/upr slopes....46-53
* Max Humidity.......
Valleys/lwr slopes...85-100 percent
Ridges/upr slopes....78-93 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...shifting to the
northeast after midnight.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY...
* Sky/Weather............Sunny. Patchy fog in the morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...77-85
Ridges/upr slopes....70-78
* Min Humidity.......
Valleys/lwr slopes...36-46 percent
Ridges/upr slopes....46-56 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....Variable 2 to 4 mph...becoming west 5 to 6
mph in the afternoon.
* Mixing Height..........4000 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY NIGHT...
* Sky/Weather............Clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...44-52
Ridges/upr slopes....45-53
* Max Humidity.......
Valleys/lwr slopes...72-87 percent
Ridges/upr slopes....69-84 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 7 mph...shifting to
the north 5 mph after midnight.
Ridges/upr slopes....North winds 5 to 8 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ415-180115-
Northeastern Interior Mendocino Including Covelo-
1208 AM PDT Thu Sep 17 2026
.TODAY...
* Sky/Weather............Sunny then becoming partly cloudy. Patchy
fog in the morning. Slight chance of rain
in the late morning and afternoon.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...72-80
Ridges/upr slopes....61-69
* Min Humidity.......
Valleys/lwr slopes...35-43 percent
Ridges/upr slopes....41-51 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....Southeast winds 5 mph...shifting to the
southwest 5 to 6 mph in the afternoon.
* Mixing Height..........6400 ft AGL.
* Chc of Wetting Rain....10 percent.
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...45-53
Ridges/upr slopes....47-53
* Max Humidity.......
Valleys/lwr slopes...78-93 percent
Ridges/upr slopes....69-84 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....Northwest winds 5 to 6 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....10 percent.
.FRIDAY...
* Sky/Weather............Sunny. Patchy fog early in the morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...80-88
Ridges/upr slopes....69-77
* Min Humidity.......
Valleys/lwr slopes...27-32 percent
Ridges/upr slopes....29-37 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
west 5 to 6 mph in the afternoon.
Ridges/upr slopes....Variable 2 to 4 mph...becoming west 5 to 6
mph in the afternoon.
* Mixing Height..........6400 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY NIGHT...
* Sky/Weather............Clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...47-55
Ridges/upr slopes....52-57
* Max Humidity.......
Valleys/lwr slopes...59-74 percent
Ridges/upr slopes....49-59 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 8 mph...shifting to
the north 5 mph after midnight.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ416-180115-
Southeastern Interior Mendocino Including Ukiah and Potter Valley-
1208 AM PDT Thu Sep 17 2026
.TODAY...
* Sky/Weather............Mostly cloudy then becoming partly cloudy
then becoming sunny. Patchy fog early in
the morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...73-80
Ridges/upr slopes....66-73
* Min Humidity.......
Valleys/lwr slopes...39-49 percent
Ridges/upr slopes....47-57 percent
* 20-Foot Winds...
Valleys/lwr slopes...South winds 5 to 8 mph.
Ridges/upr slopes....South winds 5 to 8 mph.
* Mixing Height..........5500 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...47-55
Ridges/upr slopes....51-56
* Max Humidity.......
Valleys/lwr slopes...81-96 percent
Ridges/upr slopes....74-89 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 8 mph...shifting to the
north 5 mph after midnight.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY...
* Sky/Weather............Sunny. Patchy fog early in the morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...79-87
Ridges/upr slopes....74-81
* Min Humidity.......
Valleys/lwr slopes...31-39 percent
Ridges/upr slopes....32-42 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....Variable 2 to 4 mph...becoming west 5 to 7
mph in the afternoon.
* Mixing Height..........5400 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY NIGHT...
* Sky/Weather............Clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...49-57
Ridges/upr slopes....54-62
* Max Humidity.......
Valleys/lwr slopes...63-78 percent
Ridges/upr slopes....54-64 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.
$$
CAZ417-180115-
Southwestern Interior Mendocino Including Boonville-
1208 AM PDT Thu Sep 17 2026
.TODAY...
* Sky/Weather............Mostly cloudy then becoming partly cloudy
then becoming sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...69-77
Ridges/upr slopes....66-73
* Min Humidity.......
Valleys/lwr slopes...52-62 percent
Ridges/upr slopes....55-65 percent
* 20-Foot Winds...
Valleys/lwr slopes...South winds 5 to 8 mph.
Ridges/upr slopes....South winds 5 to 8 mph.
* Mixing Height..........3500 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Partly cloudy. Patchy fog in the late
evening and overnight.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...50-54
Ridges/upr slopes....51-55
* Max Humidity.......
Valleys/lwr slopes...82-97 percent
Ridges/upr slopes....81-96 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 6 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY...
* Sky/Weather............Partly cloudy then becoming sunny. Patchy
fog in the morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...74-82
Ridges/upr slopes....72-80
* Min Humidity.......
Valleys/lwr slopes...48-58 percent
Ridges/upr slopes....52-62 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
northwest 5 to 7 mph in the afternoon.
Ridges/upr slopes....Variable 2 to 4 mph...becoming northwest 5
to 7 mph in the afternoon.
* Mixing Height..........3000 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY NIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...49-55
Ridges/upr slopes....49-57
* Max Humidity.......
Valleys/lwr slopes...74-89 percent
Ridges/upr slopes....67-82 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 9 mph.
Ridges/upr slopes....North winds 5 to 9 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ418-180115-
Northern Lake Including Gravelly Valley-
1208 AM PDT Thu Sep 17 2026
.TODAY...
* Sky/Weather............Sunny. Patchy fog early in the morning.
Slight chance of rain early in the
afternoon.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...75-80
Ridges/upr slopes....61-69
* Min Humidity.......
Valleys/lwr slopes...34-42 percent
Ridges/upr slopes....50-60 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southeast winds 5 mph...shifting to the
southwest in the afternoon.
Ridges/upr slopes....East winds 5 mph...shifting to the south 5
to 6 mph in the afternoon.
* Mixing Height..........5300 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...45-53
Ridges/upr slopes....47-54
* Max Humidity.......
Valleys/lwr slopes...75-90 percent
Ridges/upr slopes....68-83 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
Ridges/upr slopes....Northwest winds 5 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...85-89
Ridges/upr slopes....71-79
* Min Humidity.......
Valleys/lwr slopes...23-30 percent
Ridges/upr slopes....30-38 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
west 5 to 6 mph in the afternoon.
Ridges/upr slopes....Variable 2 to 4 mph...becoming southwest 5
to 6 mph in the afternoon.
* Mixing Height..........6300 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY NIGHT...
* Sky/Weather............Clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...51-59
Ridges/upr slopes....55-62
* Max Humidity.......
Valleys/lwr slopes...52-62 percent
Ridges/upr slopes....41-51 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 8 mph.
Ridges/upr slopes....Northwest winds 5 to 8 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ419-180115-
Eastern Lake Including Clearlake and Middletown-
1208 AM PDT Thu Sep 17 2026
.TODAY...
* Sky/Weather............Partly cloudy then becoming sunny. Patchy
fog early in the morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...75-78
Ridges/upr slopes....67-72
* Min Humidity.......
Valleys/lwr slopes...34-44 percent
Ridges/upr slopes....44-54 percent
* 20-Foot Winds...
Valleys/lwr slopes...East winds 5 to 7 mph.
Ridges/upr slopes....East winds 5 to 7 mph.
* Mixing Height..........5400 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...48-55
Ridges/upr slopes....50-55
* Max Humidity.......
Valleys/lwr slopes...78-93 percent
Ridges/upr slopes....69-84 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 6 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
Ridges/upr slopes....West winds 5 mph...shifting to the
northwest after midnight.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...85-89
Ridges/upr slopes....78-84
* Min Humidity.......
Valleys/lwr slopes...22-30 percent
Ridges/upr slopes....25-33 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 1 to 3 mph.
Ridges/upr slopes....Northwest winds 5 mph.
* Mixing Height..........6600 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY NIGHT...
* Sky/Weather............Clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...53-60
Ridges/upr slopes....57-64
* Max Humidity.......
Valleys/lwr slopes...53-68 percent
Ridges/upr slopes....46-56 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 8 mph.
Ridges/upr slopes....Northwest winds 5 to 8 mph.
* Mixing Height..........300 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ420-180115-
Southern Lake Including Cobb and Konocti-
1208 AM PDT Thu Sep 17 2026
.TODAY...
* Sky/Weather............Partly cloudy then becoming sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...74-77
Ridges/upr slopes....65-72
* Min Humidity.......
Valleys/lwr slopes...43-53 percent
Ridges/upr slopes....50-60 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
south 5 to 7 mph in the afternoon.
Ridges/upr slopes....Variable 2 to 4 mph...becoming southeast 5
to 6 mph in the afternoon.
* Mixing Height..........4700 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...49-55
Ridges/upr slopes....52-56
* Max Humidity.......
Valleys/lwr slopes...77-87 percent
Ridges/upr slopes....77-92 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..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...83-88
Ridges/upr slopes....76-83
* Min Humidity.......
Valleys/lwr slopes...27-34 percent
Ridges/upr slopes....30-38 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
west 5 to 6 mph in the afternoon.
Ridges/upr slopes....Variable 2 to 4 mph...becoming west 5 mph
in the afternoon.
* Mixing Height..........5400 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY NIGHT...
* Sky/Weather............Clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...54-61
Ridges/upr slopes....60-64
* Max Humidity.......
Valleys/lwr slopes...51-60 percent
Ridges/upr slopes....46-56 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 8 mph.
Ridges/upr slopes....Northwest winds 5 to 8 mph.
* Mixing Height..........200 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ421-180115-
Western Lake Including Lakeport-
1208 AM PDT Thu Sep 17 2026
.TODAY...
* Sky/Weather............Partly cloudy then becoming sunny. Patchy
fog early in the morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...73-77
Ridges/upr slopes....69-72
* Min Humidity.......
Valleys/lwr slopes...38-47 percent
Ridges/upr slopes....43-51 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southeast winds 5 mph.
Ridges/upr slopes....Variable 2 to 4 mph...becoming south 5 to
6 mph in the afternoon.
* Mixing Height..........5700 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...48-54
Ridges/upr slopes....51-57
* Max Humidity.......
Valleys/lwr slopes...78-93 percent
Ridges/upr slopes....71-82 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 mph in the evening...becoming
downslope/downvalley 1 to 3 mph.
Ridges/upr slopes....West winds 5 to 6 mph...shifting to the
north 5 mph after midnight.
* Mixing Height..........300 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...81-86
Ridges/upr slopes....76-79
* Min Humidity.......
Valleys/lwr slopes...28-36 percent
Ridges/upr slopes....31-36 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 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..........6200 ft AGL.
* Chc of Wetting Rain....0 percent.
.FRIDAY NIGHT...
* Sky/Weather............Clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...52-58
Ridges/upr slopes....55-61
* Max Humidity.......
Valleys/lwr slopes...56-71 percent
Ridges/upr slopes....50-58 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 9 mph.
Ridges/upr slopes....Northwest winds 5 to 9 mph.
* Mixing Height..........300 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
.EXTENDED FORECAST FOR DAYS 3 THROUGH 5...
...Northwest California Coast...
.SATURDAY...Mostly cloudy. Patchy fog in the morning. Patchy fog
after midnight. Lows in the lower to mid 50s. Highs 63 to 69.
North winds 5 mph.
.SUNDAY...Mostly cloudy. Patchy fog in the morning. Patchy fog
after midnight. Lows in the lower to mid 50s. Highs 63 to 69.
Winds generally less than 5 mph.
.MONDAY...Partly cloudy. Patchy fog in the morning. Patchy fog
after midnight. Lows in the lower to mid 50s. Highs 65 to 72.
North winds 5 mph.
...Northwest California Interior...
.SATURDAY...Mostly clear. Lows 52 to 60. Highs 81 to 92. Winds
generally less than 5 mph.
.SUNDAY...Partly cloudy. Lows 53 to 61. Highs 80 to 91. Winds
generally less than 5 mph.
.MONDAY...Mostly clear. Lows 53 to 61. Highs 84 to 95. Northwest
winds 5 mph.
.6 to 10 DAY OUTLOOK...Tuesday September 22 THROUGH Saturday September 26, 2026...
FOR NW CALIF...ABOVE NORMAL TEMPERATURES AND ABOVE NORMAL PRECIPITATION.
$$
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