Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Eureka, CA
Issued by NWS Eureka, CA
799
FNUS56 KEKA 152103 CCA
FWFEKA
FIRE WEATHER PLANNING FORECAST FOR NORTHWEST CALIFORNIA...CORRECTED
NATIONAL WEATHER SERVICE Eureka CA
203 PM PDT Tue Sep 15 2026
...A SLIGHT CHANCE FOR THUNDERSTORMS IN TRINITY COUNTY AND
NORTHEAST MENDOCINO COUNTY WEDNESDAY AFTERNOON AND EVENING...
.DISCUSSION...Wednesday afternoon or overnight an
upper low has the potential to bring a few thunderstorms to
Trinity county and northeastern Mendocino county. These may also
spread into northern Humboldt and Del Norte counties. This will
also bring slightly cooler temperatures and higher RH. A few
showers or thunderstorms are possible again on Thursday in Trinity
county as well. Warm and dry weather is expected to return Friday
and Saturday.
CAZ401-161315-
Coastal Del Norte-
203 PM PDT Tue Sep 15 2026
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...51-54
Ridges/upr slopes....50-53
* Max Humidity.......
Valleys/lwr slopes...89-99 percent
Ridges/upr slopes....89-99 percent
* 20-Foot Winds...
Valleys/lwr slopes...North winds 7 to 14 mph.
Ridges/upr slopes....North winds 7 to 14 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY...
* Sky/Weather............Sunny then becoming partly cloudy. Slight
chance of showers late in the afternoon.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...67-73
Ridges/upr slopes....67-73
* Min Humidity.......
Valleys/lwr slopes...58-71 percent
Ridges/upr slopes....62-72 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 8 mph.
Ridges/upr slopes....Northwest winds 5 to 6 mph...shifting to
the west in the afternoon.
* Mixing Height..........1700 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY NIGHT...
* Sky/Weather............Mostly cloudy. Slight chance of showers
through the night.
* Chance Lightning.......10%.
* Min Temperature.......
Valleys/lwr slopes...53-56
Ridges/upr slopes....53-56
* Max Humidity.......
Valleys/lwr slopes...86-96 percent
Ridges/upr slopes....82-92 percent
* 20-Foot Winds...
Valleys/lwr slopes...North winds 5 to 11 mph in the
evening...becoming downslope/downvalley 2
to 5 mph.
Ridges/upr slopes....Northeast winds 5 to 7 mph...shifting to
the southeast 5 mph after midnight.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....10 percent.
.THURSDAY...
* Sky/Weather............Mostly cloudy then becoming partly cloudy.
Patchy fog early in the morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...64-68
Ridges/upr slopes....64-69
* Min Humidity.......
Valleys/lwr slopes...71-83 percent
Ridges/upr slopes....70-80 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 1 to 3 mph...becoming
southwest 5 mph in the afternoon.
Ridges/upr slopes....Southeast winds 5 mph...shifting to the
southwest in the afternoon.
* Mixing Height..........2000 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ402-161315-
Interior Del Norte Including the Smith River Valley-
203 PM PDT Tue Sep 15 2026
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...49-52
Ridges/upr slopes....45-51
* Max Humidity.......
Valleys/lwr slopes...81-94 percent
Ridges/upr slopes....69-84 percent
* 20-Foot Winds...
Valleys/lwr slopes...North winds 5 to 8 mph.
Ridges/upr slopes....North winds 5 to 10 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY...
* Sky/Weather............Sunny then becoming partly cloudy. Slight
chance of showers in the afternoon. Slight
chance of thunderstorms late in the
afternoon.
* Chance Lightning.......0% increasing to 10% in the afternoon.
* Max Temperature.......
Valleys/lwr slopes...72-80
Ridges/upr slopes....65-73
* Min Humidity.......
Valleys/lwr slopes...56-66 percent
Ridges/upr slopes....51-61 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northeast winds 5 to 9 mph...shifting to
the northwest 5 to 8 mph in the afternoon.
Ridges/upr slopes....Northeast winds 5 to 10 mph.
* Mixing Height..........5200 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY NIGHT...
* Sky/Weather............Mostly cloudy then becoming mostly clear.
Chance of showers and slight chance of
thunderstorms in the evening.
* Chance Lightning.......10% decreasing to 0% after midnight.
* Min Temperature.......
Valleys/lwr slopes...53-56
Ridges/upr slopes....50-55
* Max Humidity.......
Valleys/lwr slopes...72-87 percent
Ridges/upr slopes....61-76 percent
* 20-Foot Winds...
Valleys/lwr slopes...North winds 5 to 8 mph...shifting to the
east 5 mph after midnight.
Ridges/upr slopes....North winds 5 to 8 mph...shifting to the
east after midnight.
* Mixing Height..........300 ft AGL.
* Chc of Wetting Rain....10 percent.
.THURSDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...68-76
Ridges/upr slopes....62-70
* Min Humidity.......
Valleys/lwr slopes...60-75 percent
Ridges/upr slopes....63-73 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
southwest 5 to 6 mph in the afternoon.
Ridges/upr slopes....East winds 5 to 6 mph...shifting to the
west in the afternoon.
* Mixing Height..........3900 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ403-161315-
Northeastern Interior Humboldt and Southwestern Siskiyou
Including Orleans-
203 PM PDT Tue Sep 15 2026
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...49-52
Ridges/upr slopes....43-48
* Max Humidity.......
Valleys/lwr slopes...73-88 percent
Ridges/upr slopes....65-75 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 7 mph...shifting to the
north 5 to 6 mph after midnight.
Ridges/upr slopes....North winds 5 to 8 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY...
* Sky/Weather............Sunny then becoming partly cloudy then
becoming mostly cloudy. Slight chance of
showers and thunderstorms in the late
morning and afternoon.
* Chance Lightning.......10%.
* Max Temperature.......
Valleys/lwr slopes...79-87
Ridges/upr slopes....64-72
* Min Humidity.......
Valleys/lwr slopes...27-35 percent
Ridges/upr slopes....37-47 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 7 mph.
Ridges/upr slopes....North winds 5 to 8 mph.
* Mixing Height..........7800 ft AGL.
* Chc of Wetting Rain....10 percent.
.WEDNESDAY NIGHT...
* Sky/Weather............Partly cloudy. Slight chance of showers
and thunderstorms in the evening.
* Chance Lightning.......10%.
* Min Temperature.......
Valleys/lwr slopes...52-55
Ridges/upr slopes....48-53
* Max Humidity.......
Valleys/lwr slopes...67-82 percent
Ridges/upr slopes....55-66 percent
* 20-Foot Winds...
Valleys/lwr slopes...North winds 5 to 6 mph...shifting to the
northeast after midnight.
Ridges/upr slopes....North winds 5 mph...shifting to the
northeast 5 to 7 mph after midnight.
* Mixing Height..........300 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......10%.
* Max Temperature.......
Valleys/lwr slopes...78-86
Ridges/upr slopes....63-71
* Min Humidity.......
Valleys/lwr slopes...31-38 percent
Ridges/upr slopes....40-50 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 1 to 3 mph.
Ridges/upr slopes....East winds 5 to 6 mph...shifting to the
west 5 mph in the afternoon.
* Mixing Height..........6500 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ404-161315-
Northern Coastal Humboldt-
203 PM PDT Tue Sep 15 2026
.TONIGHT...
* Sky/Weather............Partly cloudy then becoming mostly cloudy.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...50-54
Ridges/upr slopes....around 53
* Max Humidity.......
Valleys/lwr slopes...93-100 percent
Ridges/upr slopes....93 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.
.WEDNESDAY...
* Sky/Weather............Mostly cloudy then becoming partly cloudy.
Patchy fog in the morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...65-69
Ridges/upr slopes....around 61
* Min Humidity.......
Valleys/lwr slopes...65-80 percent
Ridges/upr slopes....77 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 8 mph.
Ridges/upr slopes....Northwest winds 5 to 8 mph.
* Mixing Height..........1800 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY NIGHT...
* Sky/Weather............Partly cloudy then becoming mostly cloudy.
Patchy dense fog in the evening.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...52-55
Ridges/upr slopes....around 52
* Max Humidity.......
Valleys/lwr slopes...87-97 percent
Ridges/upr slopes....89 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 7 mph...shifting to
the southeast 5 mph after midnight.
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.
.THURSDAY...
* Sky/Weather............Partly cloudy then becoming sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...67-73
Ridges/upr slopes....around 67
* Min Humidity.......
Valleys/lwr slopes...65-80 percent
Ridges/upr slopes....66 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southeast winds 5 mph...shifting to the
southwest 5 to 7 mph in the afternoon.
Ridges/upr slopes....Variable 2 to 4 mph...becoming southwest 5
mph in the afternoon.
* Mixing Height..........2500 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ405-161315-
Northwestern Interior Humboldt Including the Bald Hills-
203 PM PDT Tue Sep 15 2026
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...48-52
Ridges/upr slopes....47-51
* Max Humidity.......
Valleys/lwr slopes...83-98 percent
Ridges/upr slopes....78-93 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 7 mph.
Ridges/upr slopes....Northwest winds 5 to 7 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY...
* Sky/Weather............Sunny then becoming partly cloudy. Patchy
fog in the morning. Slight chance of
showers in the late morning and afternoon.
Slight chance of thunderstorms in the
afternoon.
* Chance Lightning.......10%.
* Max Temperature.......
Valleys/lwr slopes...69-77
Ridges/upr slopes....65-73
* Min Humidity.......
Valleys/lwr slopes...60-70 percent
Ridges/upr slopes....58-68 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 8 mph.
Ridges/upr slopes....Northwest winds 5 to 8 mph.
* Mixing Height..........3100 ft AGL.
* Chc of Wetting Rain....10 percent.
.WEDNESDAY NIGHT...
* Sky/Weather............Partly cloudy. Slight chance of showers
and thunderstorms.
* Chance Lightning.......10%.
* Min Temperature.......
Valleys/lwr slopes...50-56
Ridges/upr slopes....50-55
* Max Humidity.......
Valleys/lwr slopes...76-91 percent
Ridges/upr slopes....68-83 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 6 mph...shifting to
the east 5 mph after midnight.
Ridges/upr slopes....West winds 5 to 6 mph...shifting to the
east 5 to 7 mph after midnight.
* Mixing Height..........300 ft AGL.
* Chc of Wetting Rain....10 percent.
.THURSDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...70-78
Ridges/upr slopes....65-73
* Min Humidity.......
Valleys/lwr slopes...65-75 percent
Ridges/upr slopes....61-71 percent
* 20-Foot Winds...
Valleys/lwr slopes...East winds 5 mph...shifting to the west in
the afternoon.
Ridges/upr slopes....East winds 5 to 8 mph...shifting to the
west 5 mph in the afternoon.
* Mixing Height..........3600 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ406-161315-
Eastern Interior Humboldt Including Willow Creek and Hoopa-
203 PM PDT Tue Sep 15 2026
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...around 50
Ridges/upr slopes....44-48
* Max Humidity.......
Valleys/lwr slopes...82-97 percent
Ridges/upr slopes....67-82 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.
.WEDNESDAY...
* Sky/Weather............Sunny then becoming partly cloudy. Slight
chance of showers in the late morning and
afternoon. Slight chance of thunderstorms
in the afternoon.
* Chance Lightning.......0% increasing to 10% in the afternoon.
* Max Temperature.......
Valleys/lwr slopes...77-85
Ridges/upr slopes....63-71
* Min Humidity.......
Valleys/lwr slopes...36-46 percent
Ridges/upr slopes....41-51 percent
* 20-Foot Winds...
Valleys/lwr slopes...North winds 5 to 7 mph.
Ridges/upr slopes....North winds 5 to 8 mph.
* Mixing Height..........5100 ft AGL.
* Chc of Wetting Rain....10 percent.
.WEDNESDAY NIGHT...
* Sky/Weather............Mostly clear. Slight chance of showers and
thunderstorms.
* Chance Lightning.......10% decreasing to 0% after midnight.
* Min Temperature.......
Valleys/lwr slopes...50-54
Ridges/upr slopes....49-52
* Max Humidity.......
Valleys/lwr slopes...70-85 percent
Ridges/upr slopes....54-69 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 8 mph...shifting to
the east 5 to 7 mph after midnight.
Ridges/upr slopes....West winds 5 to 7 mph...shifting to the
east 5 to 9 mph after midnight.
* Mixing Height..........300 ft AGL.
* Chc of Wetting Rain....10 percent.
.THURSDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...78-86
Ridges/upr slopes....63-71
* Min Humidity.......
Valleys/lwr slopes...36-46 percent
Ridges/upr slopes....41-51 percent
* 20-Foot Winds...
Valleys/lwr slopes...East winds 5 mph...shifting to the west in
the afternoon.
Ridges/upr slopes....Southeast winds 5 to 9 mph...shifting to
the west 5 mph in the afternoon.
* Mixing Height..........6800 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ407-161315-
Southwestern Humboldt Including the King Range and the Eel River
Valley-
203 PM PDT Tue Sep 15 2026
.TONIGHT...
* Sky/Weather............Partly cloudy.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...50-53
Ridges/upr slopes....49-54
* Max Humidity.......
Valleys/lwr slopes...87-100 percent
Ridges/upr slopes....78-93 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 11 mph.
Ridges/upr slopes....North winds 10 to 17 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY...
* Sky/Weather............Partly cloudy then becoming sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...70-78
Ridges/upr slopes....61-68
* Min Humidity.......
Valleys/lwr slopes...50-60 percent
Ridges/upr slopes....61-76 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 8 mph.
Ridges/upr slopes....Northwest winds 5 to 10 mph.
* Mixing Height..........3100 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY NIGHT...
* Sky/Weather............Partly cloudy. Patchy fog after midnight.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...50-53
Ridges/upr slopes....51-54
* Max Humidity.......
Valleys/lwr slopes...84-99 percent
Ridges/upr slopes....73-88 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 8 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
Ridges/upr slopes....Northwest winds 5 to 9 mph...shifting to
the southeast 5 mph after midnight.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY...
* Sky/Weather............Partly cloudy then becoming sunny. Patchy
fog early in the morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...71-79
Ridges/upr slopes....65-71
* Min Humidity.......
Valleys/lwr slopes...50-60 percent
Ridges/upr slopes....57-72 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....South winds 5 to 7 mph.
* Mixing Height..........3200 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ408-161315-
Southeastern Interior Humboldt Including Kneeland and Alderpoint-
203 PM PDT Tue Sep 15 2026
.TONIGHT...
* Sky/Weather............Partly cloudy.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...49-52
Ridges/upr slopes....43-51
* Max Humidity.......
Valleys/lwr slopes...89-100 percent
Ridges/upr slopes....78-93 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 10 mph.
Ridges/upr slopes....Northwest winds 5 to 10 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY...
* Sky/Weather............Partly cloudy then becoming sunny then
becoming partly cloudy. Slight chance of
showers in the late morning and afternoon.
Slight chance of thunderstorms in the
afternoon.
* Chance Lightning.......0% increasing to 10% in the afternoon.
* Max Temperature.......
Valleys/lwr slopes...70-78
Ridges/upr slopes....64-69
* Min Humidity.......
Valleys/lwr slopes...57-67 percent
Ridges/upr slopes....65-75 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 8 mph.
Ridges/upr slopes....Northwest winds 5 to 8 mph.
* Mixing Height..........4600 ft AGL.
* Chc of Wetting Rain....10 percent.
.WEDNESDAY NIGHT...
* Sky/Weather............Partly cloudy. Slight chance of showers.
* Chance Lightning.......10% decreasing to 0% after midnight.
* Min Temperature.......
Valleys/lwr slopes...50-54
Ridges/upr slopes....47-55
* Max Humidity.......
Valleys/lwr slopes...79-94 percent
Ridges/upr slopes....69-84 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 8 mph in the
evening...becoming downslope/downvalley 2
to 5 mph.
Ridges/upr slopes....Northwest winds 5 to 6 mph...shifting to
the east after midnight.
* Mixing Height..........300 ft AGL.
* Chc of Wetting Rain....10 percent.
.THURSDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...71-79
Ridges/upr slopes....65-72
* Min Humidity.......
Valleys/lwr slopes...50-60 percent
Ridges/upr slopes....55-65 percent
* 20-Foot Winds...
Valleys/lwr slopes...East winds 5 mph...shifting to the
southwest 5 to 6 mph in the afternoon.
Ridges/upr slopes....East winds 5 to 6 mph...shifting to the
southwest in the afternoon.
* Mixing Height..........4900 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ409-161315-
Northwestern Trinity Including Salyer and Big Bar-
203 PM PDT Tue Sep 15 2026
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...around 50
Ridges/upr slopes....43-49
* Max Humidity.......
Valleys/lwr slopes...78-93 percent
Ridges/upr slopes....61-73 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 8 mph.
Ridges/upr slopes....Northwest winds 5 to 11 mph...shifting to
the north 5 to 8 mph after midnight.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY...
* Sky/Weather............Sunny then becoming partly cloudy. Slight
chance of showers in the late morning and
afternoon. Slight chance of thunderstorms
in the afternoon.
* Chance Lightning.......0% increasing to 10% in the afternoon.
* Max Temperature.......
Valleys/lwr slopes...76-84
Ridges/upr slopes....61-69
* Min Humidity.......
Valleys/lwr slopes...27-35 percent
Ridges/upr slopes....36-46 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 mph...shifting to the east 5
to 7 mph in the afternoon.
Ridges/upr slopes....East winds 5 to 10 mph.
* Mixing Height..........7600 ft AGL.
* Chc of Wetting Rain....10 percent.
.WEDNESDAY NIGHT...
* Sky/Weather............Mostly clear. Slight chance of showers and
thunderstorms in the evening.
* Chance Lightning.......10% decreasing to 0% after midnight.
* Min Temperature.......
Valleys/lwr slopes...49-52
Ridges/upr slopes....45-51
* Max Humidity.......
Valleys/lwr slopes...67-82 percent
Ridges/upr slopes....57-69 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 7 mph...shifting to
the east after midnight.
Ridges/upr slopes....East winds 5 to 8 mph.
* Mixing Height..........300 ft AGL.
* Chc of Wetting Rain....10 percent.
.THURSDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......10%.
* Max Temperature.......
Valleys/lwr slopes...77-85
Ridges/upr slopes....61-69
* Min Humidity.......
Valleys/lwr slopes...28-36 percent
Ridges/upr slopes....40-50 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southeast winds 5 mph in the
morning...becoming upslope/upvalley 2 to 4
mph.
Ridges/upr slopes....Southeast winds 5 to 7 mph...shifting to
the southwest 5 to 6 mph in the afternoon.
* Mixing Height..........7500 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ410-161315-
Northeastern Trinity Including Trinity Lake-
203 PM PDT Tue Sep 15 2026
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...around 50
Ridges/upr slopes....40-48
* Max Humidity.......
Valleys/lwr slopes...71-82 percent
Ridges/upr slopes....62-77 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southwest winds 5 to 6 mph...shifting to
the north after midnight.
Ridges/upr slopes....North winds 5 to 11 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY...
* Sky/Weather............Sunny then becoming partly cloudy. Slight
chance of showers in the late morning and
afternoon. Slight chance of thunderstorms
in the afternoon.
* Chance Lightning.......0% increasing to 10% in the afternoon.
* Max Temperature.......
Valleys/lwr slopes...71-79
Ridges/upr slopes....59-67
* Min Humidity.......
Valleys/lwr slopes...28-36 percent
Ridges/upr slopes....38-48 percent
* 20-Foot Winds...
Valleys/lwr slopes...North winds 5 to 6 mph...shifting to the
southeast 5 to 7 mph in the afternoon.
Ridges/upr slopes....Northeast winds 5 to 7 mph...shifting to
the southeast 5 to 10 mph in the
afternoon.
* Mixing Height..........7300 ft AGL.
* Chc of Wetting Rain....10 percent.
.WEDNESDAY NIGHT...
* Sky/Weather............Partly cloudy then becoming clear. Slight
chance of showers and thunderstorms in the
evening.
* Chance Lightning.......10% decreasing to 0% after midnight.
* Min Temperature.......
Valleys/lwr slopes...47-51
Ridges/upr slopes....40-48
* Max Humidity.......
Valleys/lwr slopes...76-89 percent
Ridges/upr slopes....66-81 percent
* 20-Foot Winds...
Valleys/lwr slopes...East winds 5 mph in the evening...becoming
downslope/downvalley 1 to 3 mph.
Ridges/upr slopes....East winds 5 to 8 mph.
* Mixing Height..........300 ft AGL.
* Chc of Wetting Rain....10 percent.
.THURSDAY...
* Sky/Weather............Sunny then becoming partly cloudy. Slight
chance of showers in the late morning and
afternoon.
* Chance Lightning.......0% increasing to 10% in the afternoon.
* Max Temperature.......
Valleys/lwr slopes...70-78
Ridges/upr slopes....58-66
* Min Humidity.......
Valleys/lwr slopes...36-46 percent
Ridges/upr slopes....48-58 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 1 to 3 mph.
Ridges/upr slopes....Variable 2 to 4 mph...becoming south 5 to
6 mph in the afternoon.
* Mixing Height..........6400 ft AGL.
* Chc of Wetting Rain....10 percent.
$$
CAZ411-161315-
Eastern Trinity Including Weaverville and Hayfork-
203 PM PDT Tue Sep 15 2026
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...43-50
Ridges/upr slopes....44-48
* Max Humidity.......
Valleys/lwr slopes...75-90 percent
Ridges/upr slopes....65-80 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 9 mph.
Ridges/upr slopes....West winds 5 to 11 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY...
* Sky/Weather............Sunny then becoming partly cloudy. Slight
chance of showers in the late morning and
afternoon. Slight chance of thunderstorms
in the afternoon.
* Chance Lightning.......0% increasing to 10% in the afternoon.
* Max Temperature.......
Valleys/lwr slopes...74-80
Ridges/upr slopes....64-72
* Min Humidity.......
Valleys/lwr slopes...26-33 percent
Ridges/upr slopes....33-43 percent
* 20-Foot Winds...
Valleys/lwr slopes...North winds 5 mph...shifting to the east 5
to 8 mph in the afternoon.
Ridges/upr slopes....East winds 5 to 9 mph.
* Mixing Height..........7300 ft AGL.
* Chc of Wetting Rain....10 percent.
.WEDNESDAY NIGHT...
* Sky/Weather............Mostly clear. Slight chance of showers and
thunderstorms in the evening.
* Chance Lightning.......10% decreasing to 0% after midnight.
* Min Temperature.......
Valleys/lwr slopes...44-50
Ridges/upr slopes....46-49
* Max Humidity.......
Valleys/lwr slopes...78-93 percent
Ridges/upr slopes....67-82 percent
* 20-Foot Winds...
Valleys/lwr slopes...East winds 5 to 6 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
Ridges/upr slopes....East winds 5 to 8 mph.
* Mixing Height..........300 ft AGL.
* Chc of Wetting Rain....10 percent.
.THURSDAY...
* Sky/Weather............Sunny then becoming partly cloudy.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...74-81
Ridges/upr slopes....64-72
* Min Humidity.......
Valleys/lwr slopes...29-37 percent
Ridges/upr slopes....37-47 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southeast winds 5 mph.
Ridges/upr slopes....Southeast winds 5 mph.
* Mixing Height..........7600 ft AGL.
* Chc of Wetting Rain....10 percent.
$$
CAZ412-161315-
Southern Trinity Including Ruth Lake and the Yolla Bollys-
203 PM PDT Tue Sep 15 2026
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...44-50
Ridges/upr slopes....43-48
* Max Humidity.......
Valleys/lwr slopes...80-95 percent
Ridges/upr slopes....70-85 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 8 mph.
Ridges/upr slopes....Northwest winds 5 to 9 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY...
* Sky/Weather............Sunny then becoming partly cloudy then
becoming mostly cloudy. Slight chance of
showers in the late morning and afternoon.
Slight chance of thunderstorms in the
afternoon.
* Chance Lightning.......0% increasing to 10% in the afternoon.
* Max Temperature.......
Valleys/lwr slopes...73-81
Ridges/upr slopes....63-71
* Min Humidity.......
Valleys/lwr slopes...36-46 percent
Ridges/upr slopes....39-49 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 8 mph.
Ridges/upr slopes....Northeast winds 5 to 7 mph...shifting to
the south in the afternoon.
* Mixing Height..........5900 ft AGL.
* Chc of Wetting Rain....10 percent.
.WEDNESDAY NIGHT...
* Sky/Weather............Partly cloudy. Slight chance of showers
and thunderstorms in the evening.
* Chance Lightning.......10%.
* Min Temperature.......
Valleys/lwr slopes...44-52
Ridges/upr slopes....43-49
* Max Humidity.......
Valleys/lwr slopes...79-94 percent
Ridges/upr slopes....75-90 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....Northwest winds 5 to 7 mph...shifting to
the east 5 to 6 mph after midnight.
* Mixing Height..........300 ft AGL.
* Chc of Wetting Rain....10 percent.
.THURSDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...73-81
Ridges/upr slopes....64-72
* 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
southwest 5 to 6 mph in the afternoon.
Ridges/upr slopes....East winds 5 to 6 mph...shifting to the
southwest in the afternoon.
* Mixing Height..........7300 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ413-161315-
Coastal Mendocino-
203 PM PDT Tue Sep 15 2026
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...50-53
Ridges/upr slopes....46-54
* Max Humidity.......
Valleys/lwr slopes...91-100 percent
Ridges/upr slopes....87-100 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 9 mph.
Ridges/upr slopes....Northwest winds 5 to 11 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY...
* Sky/Weather............Partly cloudy then becoming mostly cloudy.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...61-69
Ridges/upr slopes....62-68
* Min Humidity.......
Valleys/lwr slopes...71-86 percent
Ridges/upr slopes....64-78 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 9 mph.
Ridges/upr slopes....Northwest winds 5 to 9 mph.
* Mixing Height..........2100 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY NIGHT...
* Sky/Weather............Mostly cloudy. Patchy fog.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...50-53
Ridges/upr slopes....47-54
* Max Humidity.......
Valleys/lwr slopes...91-100 percent
Ridges/upr slopes....86-100 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....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.
.THURSDAY...
* Sky/Weather............Mostly cloudy then becoming partly cloudy
then becoming sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...66-74
Ridges/upr slopes....63-71
* Min Humidity.......
Valleys/lwr slopes...66-81 percent
Ridges/upr slopes....68-83 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..........2300 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ414-161315-
Northern Interior Mendocino Including Leggett and Willits-
203 PM PDT Tue Sep 15 2026
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...44-50
Ridges/upr slopes....44-50
* Max Humidity.......
Valleys/lwr slopes...87-100 percent
Ridges/upr slopes....77-92 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 8 mph.
Ridges/upr slopes....Northwest winds 5 to 12 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY...
* Sky/Weather............Sunny. Slight chance of showers and
thunderstorms late in the afternoon.
* Chance Lightning.......10%.
* Max Temperature.......
Valleys/lwr slopes...71-79
Ridges/upr slopes....65-72
* Min Humidity.......
Valleys/lwr slopes...48-58 percent
Ridges/upr slopes....54-64 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 6 mph...shifting to
the southwest 5 to 7 mph in the afternoon.
Ridges/upr slopes....North winds 5 to 11 mph...shifting to the
southwest 5 to 7 mph in the afternoon.
* Mixing Height..........4000 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY NIGHT...
* Sky/Weather............Partly cloudy. Slight chance of showers
and thunderstorms through the night.
Patchy fog after midnight.
* Chance Lightning.......10%.
* Min Temperature.......
Valleys/lwr slopes...45-52
Ridges/upr slopes....46-53
* Max Humidity.......
Valleys/lwr slopes...84-99 percent
Ridges/upr slopes....76-91 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...shifting to the
east 5 mph after midnight.
* Mixing Height..........300 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY...
* Sky/Weather............Partly cloudy then becoming sunny. Patchy
fog early in the morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...73-81
Ridges/upr slopes....66-74
* Min Humidity.......
Valleys/lwr slopes...46-56 percent
Ridges/upr slopes....57-67 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 to 6 mph...shifting to
the southwest in the afternoon.
* Mixing Height..........5300 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ415-161315-
Northeastern Interior Mendocino Including Covelo-
203 PM PDT Tue Sep 15 2026
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...44-52
Ridges/upr slopes....46-51
* Max Humidity.......
Valleys/lwr slopes...69-84 percent
Ridges/upr slopes....56-71 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 8 mph.
Ridges/upr slopes....Northwest winds 5 to 9 mph.
* Mixing Height..........300 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY...
* Sky/Weather............Sunny then becoming partly cloudy. Slight
chance of showers in the late morning and
afternoon. Slight chance of thunderstorms
in the afternoon.
* Chance Lightning.......0% increasing to 10% in the afternoon.
* Max Temperature.......
Valleys/lwr slopes...74-82
Ridges/upr slopes....64-72
* Min Humidity.......
Valleys/lwr slopes...33-40 percent
Ridges/upr slopes....38-48 percent
* 20-Foot Winds...
Valleys/lwr slopes...East winds 5 mph...shifting to the
southwest 5 to 9 mph in the afternoon.
Ridges/upr slopes....Northeast winds 5 to 8 mph...shifting to
the southwest 5 to 9 mph in the afternoon.
* Mixing Height..........6200 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY NIGHT...
* Sky/Weather............Partly cloudy. Slight chance of showers
and thunderstorms in the evening.
* Chance Lightning.......10%.
* Min Temperature.......
Valleys/lwr slopes...45-52
Ridges/upr slopes....45-51
* Max Humidity.......
Valleys/lwr slopes...79-94 percent
Ridges/upr slopes....69-84 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 8 mph...shifting to the
east 5 mph after midnight.
Ridges/upr slopes....West winds 5 to 8 mph...shifting to the
northeast 5 mph after midnight.
* Mixing Height..........300 ft AGL.
* Chc of Wetting Rain....10 percent.
.THURSDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...75-83
Ridges/upr slopes....64-72
* Min Humidity.......
Valleys/lwr slopes...34-41 percent
Ridges/upr slopes....41-51 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
southwest 5 mph in the afternoon.
Ridges/upr slopes....East winds 5 mph...shifting to the
southwest in the afternoon.
* Mixing Height..........6700 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ416-161315-
Southeastern Interior Mendocino Including Ukiah and Potter Valley-
203 PM PDT Tue Sep 15 2026
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...47-53
Ridges/upr slopes....50-54
* Max Humidity.......
Valleys/lwr slopes...78-93 percent
Ridges/upr slopes....67-82 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.
.WEDNESDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...73-81
Ridges/upr slopes....68-75
* Min Humidity.......
Valleys/lwr slopes...40-50 percent
Ridges/upr slopes....45-55 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 8 mph.
Ridges/upr slopes....West winds 5 to 8 mph.
* Mixing Height..........4200 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY NIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...47-55
Ridges/upr slopes....51-56
* Max Humidity.......
Valleys/lwr slopes...79-94 percent
Ridges/upr slopes....71-86 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 9 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.
.THURSDAY...
* Sky/Weather............Mostly cloudy then becoming partly cloudy
then becoming sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...76-84
Ridges/upr slopes....69-77
* Min Humidity.......
Valleys/lwr slopes...36-46 percent
Ridges/upr slopes....42-52 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southeast winds 5 mph...shifting to the
south in the afternoon.
Ridges/upr slopes....South winds 5 to 7 mph.
* Mixing Height..........5700 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ417-161315-
Southwestern Interior Mendocino Including Boonville-
203 PM PDT Tue Sep 15 2026
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...49-54
Ridges/upr slopes....49-54
* Max Humidity.......
Valleys/lwr slopes...83-98 percent
Ridges/upr slopes....78-93 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 7 mph.
Ridges/upr slopes....Northwest winds 5 to 7 mph.
* Mixing Height..........300 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY...
* Sky/Weather............Partly cloudy.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...67-75
Ridges/upr slopes....65-73
* Min Humidity.......
Valleys/lwr slopes...59-69 percent
Ridges/upr slopes....62-72 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.
.WEDNESDAY NIGHT...
* Sky/Weather............Partly cloudy then becoming mostly cloudy
then becoming partly cloudy. Patchy fog
after midnight.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...50-54
Ridges/upr slopes....51-55
* Max Humidity.......
Valleys/lwr slopes...81-96 percent
Ridges/upr slopes....78-93 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 7 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY...
* Sky/Weather............Mostly cloudy then becoming partly cloudy
then becoming sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...72-80
Ridges/upr slopes....69-76
* Min Humidity.......
Valleys/lwr slopes...53-63 percent
Ridges/upr slopes....55-65 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
south 5 to 6 mph in the afternoon.
Ridges/upr slopes....Southeast winds 5 mph...shifting to the
south 5 to 6 mph in the afternoon.
* Mixing Height..........4300 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ418-161315-
Northern Lake Including Gravelly Valley-
203 PM PDT Tue Sep 15 2026
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...46-54
Ridges/upr slopes....49-54
* Max Humidity.......
Valleys/lwr slopes...63-78 percent
Ridges/upr slopes....51-61 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 8 mph.
Ridges/upr slopes....West winds 5 to 9 mph...shifting to the
northwest 5 to 8 mph after midnight.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY...
* Sky/Weather............Sunny. Slight chance of showers in the
afternoon.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...78-82
Ridges/upr slopes....64-72
* Min Humidity.......
Valleys/lwr slopes...31-39 percent
Ridges/upr slopes....37-47 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southeast winds 5 to 6 mph...shifting to
the southwest 5 to 8 mph in the afternoon.
Ridges/upr slopes....Northeast winds 5 to 6 mph...shifting to
the south 5 to 7 mph in the afternoon.
* Mixing Height..........5800 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY NIGHT...
* Sky/Weather............Mostly clear. Slight chance of showers
through the night.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...44-52
Ridges/upr slopes....45-52
* Max Humidity.......
Valleys/lwr slopes...83-98 percent
Ridges/upr slopes....71-86 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 7 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
* Mixing Height..........300 ft AGL.
* Chc of Wetting Rain....10 percent.
.THURSDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...79-83
Ridges/upr slopes....65-73
* Min Humidity.......
Valleys/lwr slopes...31-39 percent
Ridges/upr slopes....44-54 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
south 5 to 6 mph in the afternoon.
Ridges/upr slopes....Northeast winds 5 to 6 mph...shifting to
the southeast in the afternoon.
* Mixing Height..........5600 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ419-161315-
Eastern Lake Including Clearlake and Middletown-
203 PM PDT Tue Sep 15 2026
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...48-55
Ridges/upr slopes....50-54
* Max Humidity.......
Valleys/lwr slopes...76-91 percent
Ridges/upr slopes....67-78 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 8 mph.
Ridges/upr slopes....West winds 5 to 8 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...78-82
Ridges/upr slopes....72-76
* Min Humidity.......
Valleys/lwr slopes...32-42 percent
Ridges/upr slopes....38-48 percent
* 20-Foot Winds...
Valleys/lwr slopes...South winds 5 to 10 mph.
Ridges/upr slopes....South winds 5 to 10 mph.
* Mixing Height..........6500 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY NIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...46-52
Ridges/upr slopes....around 50
* Max Humidity.......
Valleys/lwr slopes...85-100 percent
Ridges/upr slopes....84-99 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southwest winds 5 to 8 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
Ridges/upr slopes....Southwest 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.
.THURSDAY...
* Sky/Weather............Mostly cloudy then becoming partly cloudy
then becoming sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...around 80
Ridges/upr slopes....70-75
* Min Humidity.......
Valleys/lwr slopes...30-40 percent
Ridges/upr slopes....39-49 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
east 5 to 6 mph in the afternoon.
Ridges/upr slopes....North winds 5 mph...shifting to the east 5
to 7 mph in the afternoon.
* Mixing Height..........5500 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ420-161315-
Southern Lake Including Cobb and Konocti-
203 PM PDT Tue Sep 15 2026
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...49-52
Ridges/upr slopes....51-54
* Max Humidity.......
Valleys/lwr slopes...69-84 percent
Ridges/upr slopes....63-75 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.
.WEDNESDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...76-80
Ridges/upr slopes....68-75
* Min Humidity.......
Valleys/lwr slopes...38-48 percent
Ridges/upr slopes....42-52 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southwest winds 5 to 11 mph.
Ridges/upr slopes....Southwest winds 5 to 11 mph.
* Mixing Height..........5500 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY NIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...48-54
Ridges/upr slopes....51-54
* Max Humidity.......
Valleys/lwr slopes...81-96 percent
Ridges/upr slopes....77-92 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southwest winds 5 to 10 mph in the
evening...becoming downslope/downvalley 2
to 5 mph.
Ridges/upr slopes....Southwest 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.
.THURSDAY...
* Sky/Weather............Mostly cloudy then becoming partly cloudy
then becoming sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...around 80
Ridges/upr slopes....69-76
* Min Humidity.......
Valleys/lwr slopes...39-49 percent
Ridges/upr slopes....46-56 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
southeast 5 to 6 mph in the afternoon.
Ridges/upr slopes....Variable 2 to 4 mph...becoming southeast 5
to 6 mph in the afternoon.
* Mixing Height..........5200 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ421-161315-
Western Lake Including Lakeport-
203 PM PDT Tue Sep 15 2026
.TONIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...49-55
Ridges/upr slopes....51-54
* Max Humidity.......
Valleys/lwr slopes...77-92 percent
Ridges/upr slopes....67-82 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 8 mph.
Ridges/upr slopes....Northwest winds 5 to 9 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...75-80
Ridges/upr slopes....70-73
* Min Humidity.......
Valleys/lwr slopes...35-45 percent
Ridges/upr slopes....38-45 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 6 mph...shifting to the
southwest 5 to 8 mph in the afternoon.
Ridges/upr slopes....West winds 5 to 8 mph.
* Mixing Height..........5600 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY NIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...48-54
Ridges/upr slopes....51-56
* Max Humidity.......
Valleys/lwr slopes...83-98 percent
Ridges/upr slopes....69-84 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....Southwest winds 5 to 8 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
.THURSDAY...
* Sky/Weather............Partly cloudy then becoming sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...76-81
Ridges/upr slopes....72-75
* Min Humidity.......
Valleys/lwr slopes...34-44 percent
Ridges/upr slopes....38-46 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
south 5 to 6 mph in the afternoon.
Ridges/upr slopes....South winds 5 to 7 mph.
* Mixing Height..........5700 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
.EXTENDED FORECAST FOR DAYS 3 THROUGH 5...
...Northwest California Coast...
.FRIDAY...Partly cloudy. Patchy fog. Lows in the lower to mid
50s. Highs 64 to 70. Winds generally less than 5 mph.
.SATURDAY...Partly cloudy. Patchy fog. Lows in the lower to mid
50s. Highs 64 to 69. North winds 5 mph.
.SUNDAY...Mostly cloudy. Patchy fog. Lows in the lower to mid
50s. Highs 63 to 69. Winds generally less than 5 mph.
...Northwest California Interior...
.FRIDAY...Clear. Lows 48 to 56. Highs 80 to 89. Winds generally
less than 5 mph.
.SATURDAY...Mostly clear. Lows 52 to 60. Highs 82 to 92.
Northwest winds 5 mph.
.SUNDAY...Partly cloudy. Lows 52 to 60. Highs 81 to 91. Winds
generally less than 5 mph.
.6 to 10 DAY OUTLOOK...Monday September 21 THROUGH Friday September 25, 2026...
FOR NW CALIF...ABOVE NORMAL TEMPERATURES AND ABOVE NORMAL PRECIPITATION.
$$
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