Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Eureka, CA
Issued by NWS Eureka, CA
998
FNUS56 KEKA 180709
FWFEKA
FIRE WEATHER PLANNING FORECAST FOR NORTHWEST CALIFORNIA
NATIONAL WEATHER SERVICE Eureka CA
1209 AM PDT Tue Aug 18 2026
.DISCUSSION...Generally near normal temperatures are expected
through mid week with 80s to mid 90s forecast for most interior
valleys. Afternoon relative humidities are forecast to be in the
high teens to the 20s. Overnight recoveries are forecast to be
good to excellent in the lower elevations and moderate to locally
poor in the higher elevations. Winds remain relatively light and
terrain driven, with typical breezes in the afternoons. Late in
the week another trough is expected to bring cooler temperatures
and higher RH. There is a low end potential for a few
thunderstorms Friday in the inland areas. Increased winds are also
expected on Friday.
CAZ401-190115-
Coastal Del Norte-
1209 AM PDT Tue Aug 18 2026
.TODAY...
* Sky/Weather............Mostly cloudy then becoming partly cloudy.
Patchy fog in the morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...64-71
Ridges/upr slopes....64-71
* Min Humidity.......
Valleys/lwr slopes...69-81 percent
Ridges/upr slopes....71-81 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 7 mph.
Ridges/upr slopes....West winds 5 to 7 mph.
* Mixing Height..........1100 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Partly cloudy then becoming mostly cloudy.
Patchy fog after midnight.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...52-55
Ridges/upr slopes....51-55
* Max Humidity.......
Valleys/lwr slopes...92-100 percent
Ridges/upr slopes....91-100 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southwest winds 5 to 6 mph in the
evening...becoming light winds 2 to 4 mph.
Ridges/upr slopes....Southwest winds 5 mph in the
evening...becoming light winds 1 to 3 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY...
* 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...63-70
Ridges/upr slopes....63-69
* Min Humidity.......
Valleys/lwr slopes...72-84 percent
Ridges/upr slopes....73-83 percent
* 20-Foot Winds...
Valleys/lwr slopes...Light winds 2 to 4 mph...becoming west 5
to 6 mph in the afternoon.
Ridges/upr slopes....Variable 2 to 4 mph...becoming west 5 to 6
mph in the afternoon.
* Mixing Height..........1400 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY NIGHT...
* Sky/Weather............Mostly clear then becoming mostly cloudy.
Patchy fog in the late evening and
overnight.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...51-54
Ridges/upr slopes....49-53
* Max Humidity.......
Valleys/lwr slopes...94-100 percent
Ridges/upr slopes....94-100 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 mph in the evening...becoming
light winds 2 to 4 mph.
Ridges/upr slopes....Southwest winds 5 to 6 mph in the
evening...becoming light winds 2 to 4 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ402-190115-
Interior Del Norte Including the Smith River Valley-
1209 AM PDT Tue Aug 18 2026
.TODAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...76-84
Ridges/upr slopes....73-81
* Min Humidity.......
Valleys/lwr slopes...64-74 percent
Ridges/upr slopes....57-67 percent
* 20-Foot Winds...
Valleys/lwr slopes...North winds 5 to 6 mph...shifting to the
west in the afternoon.
Ridges/upr slopes....North winds 5 to 6 mph...shifting to the
northwest in the afternoon.
* Mixing Height..........3700 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Partly cloudy then becoming mostly cloudy.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...52-60
Ridges/upr slopes....56-64
* Max Humidity.......
Valleys/lwr slopes...72-87 percent
Ridges/upr slopes....56-71 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 6 mph...shifting to
the north 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............Mostly cloudy then becoming partly cloudy
then becoming sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...74-82
Ridges/upr slopes....72-80
* Min Humidity.......
Valleys/lwr slopes...68-78 percent
Ridges/upr slopes....62-72 percent
* 20-Foot Winds...
Valleys/lwr slopes...North winds 5 to 6 mph...shifting to the
west in the afternoon.
Ridges/upr slopes....Northeast winds 5 to 6 mph...shifting to
the west in the afternoon.
* Mixing Height..........4200 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY NIGHT...
* Sky/Weather............Mostly clear. Patchy fog early in the
morning.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...49-57
Ridges/upr slopes....54-62
* Max Humidity.......
Valleys/lwr slopes...77-92 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 to 6 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ403-190115-
Northeastern Interior Humboldt and Southwestern Siskiyou
Including Orleans-
1209 AM PDT Tue Aug 18 2026
.TODAY...
* Sky/Weather............Sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...89-97
Ridges/upr slopes....75-83
* Min Humidity.......
Valleys/lwr slopes...19-27 percent
Ridges/upr slopes....27-35 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 5 mph...becoming
west 5 to 8 mph in the afternoon.
Ridges/upr slopes....Northeast winds 5 to 6 mph...shifting to
the west 5 to 8 mph in the afternoon.
* Mixing Height..........8100 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Partly cloudy then becoming mostly cloudy.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...58-64
Ridges/upr slopes....61-64
* Max Humidity.......
Valleys/lwr slopes...55-65 percent
Ridges/upr slopes....39-49 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 6 mph...shifting to the
northeast 5 mph after midnight.
Ridges/upr slopes....Northwest winds 5 to 7 mph...shifting to
the northeast 5 to 6 mph after midnight.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY...
* Sky/Weather............Mostly cloudy then becoming partly cloudy
then becoming sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...90-98
Ridges/upr slopes....75-83
* Min Humidity.......
Valleys/lwr slopes...21-29 percent
Ridges/upr slopes....27-35 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....Northeast winds 5 to 6 mph...shifting to
the west 5 to 7 mph in the afternoon.
* Mixing Height..........7400 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY NIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...55-62
Ridges/upr slopes....59-62
* Max Humidity.......
Valleys/lwr slopes...63-78 percent
Ridges/upr slopes....51-61 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...shifting to the
east 5 mph after midnight.
* Mixing Height..........300 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ404-190115-
Northern Coastal Humboldt-
1209 AM PDT Tue Aug 18 2026
.TODAY...
* Sky/Weather............Mostly cloudy then becoming partly cloudy.
Patchy fog in the morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...62-68
Ridges/upr slopes....around 60
* Min Humidity.......
Valleys/lwr slopes...76-91 percent
Ridges/upr slopes....86 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 8 mph.
Ridges/upr slopes....Northwest winds 5 to 8 mph.
* Mixing Height..........1300 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Mostly cloudy. Patchy fog in the late
evening and overnight.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...52-55
Ridges/upr slopes....around 52
* Max Humidity.......
Valleys/lwr slopes...92-100 percent
Ridges/upr slopes....95 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 7 mph in the
evening...becoming light winds 2 to 4 mph.
Ridges/upr slopes....Northwest winds 5 to 6 mph in the
evening...becoming light winds 2 to 4 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY...
* Sky/Weather............Mostly cloudy then becoming partly cloudy.
Patchy fog in the morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...61-67
Ridges/upr slopes....around 59
* Min Humidity.......
Valleys/lwr slopes...76-91 percent
Ridges/upr slopes....88 percent
* 20-Foot Winds...
Valleys/lwr slopes...Light winds 2 to 4 mph...becoming west 5
to 7 mph in the afternoon.
Ridges/upr slopes....Variable 2 to 4 mph...becoming northwest 5
mph in the afternoon.
* Mixing Height..........1600 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY NIGHT...
* Sky/Weather............Partly cloudy then becoming mostly cloudy.
Patchy fog after midnight.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...52-55
Ridges/upr slopes....around 52
* Max Humidity.......
Valleys/lwr slopes...93-100 percent
Ridges/upr slopes....95 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 6 mph in the
evening...becoming light winds 2 to 4 mph.
Ridges/upr slopes....North winds 5 to 8 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ405-190115-
Northwestern Interior Humboldt Including the Bald Hills-
1209 AM PDT Tue Aug 18 2026
.TODAY...
* Sky/Weather............Partly cloudy then becoming sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...74-82
Ridges/upr slopes....70-78
* Min Humidity.......
Valleys/lwr slopes...67-77 percent
Ridges/upr slopes....60-70 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 8 mph.
Ridges/upr slopes....Northwest winds 5 to 8 mph.
* Mixing Height..........1600 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Partly cloudy then becoming mostly cloudy.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...52-60
Ridges/upr slopes....54-62
* Max Humidity.......
Valleys/lwr slopes...76-91 percent
Ridges/upr slopes....63-78 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 6 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
Ridges/upr slopes....West winds 5 to 6 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
* Mixing Height..........300 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY...
* 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...72-80
Ridges/upr slopes....69-77
* Min Humidity.......
Valleys/lwr slopes...69-79 percent
Ridges/upr slopes....63-73 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..........2200 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY NIGHT...
* Sky/Weather............Partly cloudy. Patchy fog early in the
morning.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...51-56
Ridges/upr slopes....52-60
* Max Humidity.......
Valleys/lwr slopes...82-97 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 to 6 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
* Mixing Height..........300 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ406-190115-
Eastern Interior Humboldt Including Willow Creek and Hoopa-
1209 AM PDT Tue Aug 18 2026
.TODAY...
* Sky/Weather............Sunny. Patchy smoke.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...89-97
Ridges/upr slopes....75-83
* Min Humidity.......
Valleys/lwr slopes...29-37 percent
Ridges/upr slopes....34-42 percent
* 20-Foot Winds...
Valleys/lwr slopes...North winds 5 to 8 mph.
Ridges/upr slopes....Northeast winds 5 mph...shifting to the
northwest 5 to 8 mph in the afternoon.
* Mixing Height..........4500 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Mostly clear then becoming mostly cloudy.
Patchy smoke in the evening.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...around 60
Ridges/upr slopes....61-65
* Max Humidity.......
Valleys/lwr slopes...57-72 percent
Ridges/upr slopes....42-52 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 7 mph...shifting to
the northeast 5 to 6 mph after midnight.
* Mixing Height..........300 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY...
* Sky/Weather............Partly cloudy then becoming sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...88-96
Ridges/upr slopes....75-83
* Min Humidity.......
Valleys/lwr slopes...31-39 percent
Ridges/upr slopes....33-43 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
west 5 to 7 mph in the afternoon.
Ridges/upr slopes....East winds 5 mph...shifting to the west 5
to 7 mph in the afternoon.
* Mixing Height..........5200 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY NIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...56-59
Ridges/upr slopes....58-62
* Max Humidity.......
Valleys/lwr slopes...68-83 percent
Ridges/upr slopes....50-60 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...shifting to the
east 5 mph after midnight.
* Mixing Height..........300 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ407-190115-
Southwestern Humboldt Including the King Range and the Eel River
Valley-
1209 AM PDT Tue Aug 18 2026
.TODAY...
* Sky/Weather............Partly cloudy then becoming sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...79-87
Ridges/upr slopes....69-77
* Min Humidity.......
Valleys/lwr slopes...49-59 percent
Ridges/upr slopes....70-80 percent
* 20-Foot Winds...
Valleys/lwr slopes...North winds 5 to 11 mph.
Ridges/upr slopes....North winds 5 to 12 mph.
* Mixing Height..........2400 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Partly cloudy then becoming mostly cloudy.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...53-57
Ridges/upr slopes....53-61
* Max Humidity.......
Valleys/lwr slopes...76-91 percent
Ridges/upr slopes....69-84 percent
* 20-Foot Winds...
Valleys/lwr slopes...North winds 5 to 11 mph.
Ridges/upr slopes....North winds 5 to 11 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...78-86
Ridges/upr slopes....66-74
* Min Humidity.......
Valleys/lwr slopes...51-61 percent
Ridges/upr slopes....69-84 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 8 mph.
Ridges/upr slopes....Northwest winds 5 to 8 mph.
* Mixing Height..........2400 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY NIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...52-56
Ridges/upr slopes....53-58
* Max Humidity.......
Valleys/lwr slopes...80-95 percent
Ridges/upr slopes....74-89 percent
* 20-Foot Winds...
Valleys/lwr slopes...North winds 5 to 8 mph.
Ridges/upr slopes....North winds 5 to 9 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ408-190115-
Southeastern Interior Humboldt Including Kneeland and Alderpoint-
1209 AM PDT Tue Aug 18 2026
.TODAY...
* Sky/Weather............Partly cloudy then becoming sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...77-85
Ridges/upr slopes....70-78
* Min Humidity.......
Valleys/lwr slopes...59-69 percent
Ridges/upr slopes....70-80 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 8 mph.
Ridges/upr slopes....Northwest winds 5 to 8 mph.
* Mixing Height..........3500 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Partly cloudy then becoming mostly cloudy.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...53-59
Ridges/upr slopes....55-63
* Max Humidity.......
Valleys/lwr slopes...74-89 percent
Ridges/upr slopes....59-74 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 north 5 mph after midnight.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY...
* Sky/Weather............Mostly cloudy then becoming sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...77-85
Ridges/upr slopes....69-77
* Min Humidity.......
Valleys/lwr slopes...60-70 percent
Ridges/upr slopes....73-83 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....Northeast winds 5 mph...shifting to the
west 5 to 6 mph in the afternoon.
* Mixing Height..........4400 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY NIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...52-57
Ridges/upr slopes....53-61
* Max Humidity.......
Valleys/lwr slopes...83-98 percent
Ridges/upr slopes....65-80 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 8 mph.
Ridges/upr slopes....Northwest winds 5 to 6 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ409-190115-
Northwestern Trinity Including Salyer and Big Bar-
1209 AM PDT Tue Aug 18 2026
.TODAY...
* Sky/Weather............Partly cloudy then becoming sunny. Patchy
smoke early in the morning. Patchy smoke
late in the afternoon.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...90-98
Ridges/upr slopes....77-85
* Min Humidity.......
Valleys/lwr slopes...20-28 percent
Ridges/upr slopes....22-30 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
northwest 5 to 8 mph in the afternoon.
Ridges/upr slopes....Northeast winds 5 mph...shifting to the
west 5 to 8 mph in the afternoon.
* Mixing Height..........8500 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Mostly clear then becoming mostly cloudy.
Patchy smoke in the evening.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...58-62
Ridges/upr slopes....60-65
* Max Humidity.......
Valleys/lwr slopes...54-64 percent
Ridges/upr slopes....37-45 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 8 mph...shifting to
the northeast 5 to 7 mph after midnight.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY...
* Sky/Weather............Mostly cloudy then becoming partly cloudy
then becoming sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...91-99
Ridges/upr slopes....78-86
* Min Humidity.......
Valleys/lwr slopes...20-28 percent
Ridges/upr slopes....20-28 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
southwest 5 to 8 mph in the afternoon.
* Mixing Height..........9300 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY NIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...56-61
Ridges/upr slopes....59-64
* Max Humidity.......
Valleys/lwr slopes...60-75 percent
Ridges/upr slopes....41-51 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 8 mph in the
evening...becoming downslope/downvalley 2
to 5 mph.
Ridges/upr slopes....West winds 5 to 8 mph...shifting to the
northeast 5 to 6 mph after midnight.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ410-190115-
Northeastern Trinity Including Trinity Lake-
1209 AM PDT Tue Aug 18 2026
.TODAY...
* Sky/Weather............Partly cloudy then becoming sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...89-97
Ridges/upr slopes....76-84
* Min Humidity.......
Valleys/lwr slopes...13-20 percent
Ridges/upr slopes....20-28 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 1 to 3 mph.
Ridges/upr slopes....Northeast winds 5 mph...shifting to the
south 5 to 6 mph in the afternoon.
* Mixing Height..........9100 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Mostly clear then becoming mostly cloudy
then becoming partly cloudy. Patchy smoke
late in the evening.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...59-65
Ridges/upr slopes....56-64
* Max Humidity.......
Valleys/lwr slopes...46-56 percent
Ridges/upr slopes....36-46 percent
* 20-Foot Winds...
Valleys/lwr slopes...Southwest winds 5 mph...shifting to the
north 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............Mostly cloudy then becoming sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...89-97
Ridges/upr slopes....76-84
* Min Humidity.......
Valleys/lwr slopes...15-21 percent
Ridges/upr slopes....19-27 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....East winds 5 mph...shifting to the south 5
to 7 mph in the afternoon.
* Mixing Height..........9700 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY NIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...59-64
Ridges/upr slopes....55-63
* Max Humidity.......
Valleys/lwr slopes...50-60 percent
Ridges/upr slopes....38-48 percent
* 20-Foot Winds...
Valleys/lwr slopes...South winds 5 to 6 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
Ridges/upr slopes....Southwest winds 5 to 8 mph in the
evening...becoming downslope/downvalley 2
to 5 mph.
* Mixing Height..........500 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ411-190115-
Eastern Trinity Including Weaverville and Hayfork-
1209 AM PDT Tue Aug 18 2026
.TODAY...
* Sky/Weather............Partly cloudy then becoming sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...93-99
Ridges/upr slopes....81-89
* Min Humidity.......
Valleys/lwr slopes...14-19 percent
Ridges/upr slopes....18-25 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....Variable 2 to 4 mph...becoming northeast 5
to 7 mph in the afternoon.
* Mixing Height..........9000 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Partly cloudy then becoming mostly cloudy.
Patchy smoke late in the evening.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...56-63
Ridges/upr slopes....60-64
* Max Humidity.......
Valleys/lwr slopes...48-58 percent
Ridges/upr slopes....38-48 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 8 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY...
* Sky/Weather............Mostly cloudy then becoming partly cloudy
then becoming sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...93-99
Ridges/upr slopes....81-89
* Min Humidity.......
Valleys/lwr slopes...16-21 percent
Ridges/upr slopes....18-26 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 1 to 3 mph...becoming
south 5 mph in the afternoon.
Ridges/upr slopes....East winds 5 mph...shifting to the south 5
to 6 mph in the afternoon.
* Mixing Height..........10300 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY NIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...55-63
Ridges/upr slopes....59-64
* Max Humidity.......
Valleys/lwr slopes...51-61 percent
Ridges/upr slopes....43-53 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....West winds 5 to 7 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ412-190115-
Southern Trinity Including Ruth Lake and the Yolla Bollys-
1209 AM PDT Tue Aug 18 2026
.TODAY...
* Sky/Weather............Partly cloudy then becoming sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...87-95
Ridges/upr slopes....79-87
* Min Humidity.......
Valleys/lwr slopes...25-33 percent
Ridges/upr slopes....25-33 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....Northeast winds 5 to 6 mph...shifting to
the west in the afternoon.
* Mixing Height..........8000 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Partly cloudy then becoming mostly cloudy.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...57-62
Ridges/upr slopes....55-63
* Max Humidity.......
Valleys/lwr slopes...57-72 percent
Ridges/upr slopes....51-61 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 north 5 mph after midnight.
* 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...87-95
Ridges/upr slopes....79-87
* Min Humidity.......
Valleys/lwr slopes...26-34 percent
Ridges/upr slopes....24-32 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 mph...shifting to the
southwest 5 to 6 mph in the afternoon.
* Mixing Height..........8000 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY NIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...55-60
Ridges/upr slopes....54-62
* Max Humidity.......
Valleys/lwr slopes...63-78 percent
Ridges/upr slopes....53-68 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 6 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
Ridges/upr slopes....West winds 5 to 6 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ413-190115-
Coastal Mendocino-
1209 AM PDT Tue Aug 18 2026
.TODAY...
* Sky/Weather............Mostly cloudy then becoming partly cloudy
then becoming sunny. Patchy fog in the
morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...67-75
Ridges/upr slopes....70-78
* Min Humidity.......
Valleys/lwr slopes...67-82 percent
Ridges/upr slopes....60-70 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 8 mph.
Ridges/upr slopes....West winds 5 to 11 mph.
* Mixing Height..........1200 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Partly cloudy then becoming mostly cloudy.
Patchy fog in the late evening and
overnight.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...51-54
Ridges/upr slopes....51-57
* Max Humidity.......
Valleys/lwr slopes...85-100 percent
Ridges/upr slopes....80-95 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 8 mph.
Ridges/upr slopes....Northwest winds 5 to 9 mph...shifting to
the north 5 to 6 mph after midnight.
* Mixing Height..........300 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY...
* Sky/Weather............Mostly cloudy then becoming partly cloudy
then becoming sunny. Patchy fog in the
morning.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...65-73
Ridges/upr slopes....68-76
* Min Humidity.......
Valleys/lwr slopes...69-84 percent
Ridges/upr slopes....58-73 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 9 mph.
Ridges/upr slopes....West winds 5 to 10 mph.
* Mixing Height..........1300 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY NIGHT...
* Sky/Weather............Mostly clear 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....49-56
* Max Humidity.......
Valleys/lwr slopes...89-100 percent
Ridges/upr slopes....84-99 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 8 mph.
Ridges/upr slopes....Northwest winds 5 to 8 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ414-190115-
Northern Interior Mendocino Including Leggett and Willits-
1209 AM PDT Tue Aug 18 2026
.TODAY...
* Sky/Weather............Partly cloudy then becoming sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...87-95
Ridges/upr slopes....80-88
* Min Humidity.......
Valleys/lwr slopes...32-40 percent
Ridges/upr slopes....36-44 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 7 mph.
Ridges/upr slopes....West winds 5 to 7 mph.
* Mixing Height..........5100 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Partly cloudy then becoming mostly cloudy.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...52-60
Ridges/upr slopes....55-63
* Max Humidity.......
Valleys/lwr slopes...66-81 percent
Ridges/upr slopes....61-76 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 7 mph.
Ridges/upr slopes....Northwest winds 5 to 6 mph...shifting to
the north after midnight.
* 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...86-94
Ridges/upr slopes....79-87
* Min Humidity.......
Valleys/lwr slopes...33-41 percent
Ridges/upr slopes....38-48 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....Northeast winds 5 mph...shifting to the
southwest 5 to 6 mph in the afternoon.
* Mixing Height..........4800 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY NIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...51-58
Ridges/upr slopes....53-61
* Max Humidity.......
Valleys/lwr slopes...72-87 percent
Ridges/upr slopes....67-82 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
north 5 mph after midnight.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ415-190115-
Northeastern Interior Mendocino Including Covelo-
1209 AM PDT Tue Aug 18 2026
.TODAY...
* Sky/Weather............Mostly cloudy then becoming partly cloudy
then becoming sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...90-98
Ridges/upr slopes....79-87
* Min Humidity.......
Valleys/lwr slopes...22-27 percent
Ridges/upr slopes....23-31 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....Northeast winds 5 mph...shifting to the
west 5 to 6 mph in the afternoon.
* Mixing Height..........7700 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Partly cloudy then becoming mostly cloudy.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...56-64
Ridges/upr slopes....61-67
* Max Humidity.......
Valleys/lwr slopes...55-70 percent
Ridges/upr slopes....43-53 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 after midnight.
* 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...90-98
Ridges/upr slopes....79-87
* Min Humidity.......
Valleys/lwr slopes...22-27 percent
Ridges/upr slopes....23-31 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 mph...shifting to the
southwest 5 to 7 mph in the afternoon.
* Mixing Height..........7600 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY NIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...56-64
Ridges/upr slopes....59-66
* Max Humidity.......
Valleys/lwr slopes...57-72 percent
Ridges/upr slopes....44-54 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 6 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
Ridges/upr slopes....West winds 5 to 7 mph...shifting to the
north 5 mph after midnight.
* Mixing Height..........300 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ416-190115-
Southeastern Interior Mendocino Including Ukiah and Potter Valley-
1209 AM PDT Tue Aug 18 2026
.TODAY...
* Sky/Weather............Partly cloudy then becoming sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...88-96
Ridges/upr slopes....82-90
* Min Humidity.......
Valleys/lwr slopes...25-33 percent
Ridges/upr slopes....30-38 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 5 mph...becoming
west 5 to 8 mph in the afternoon.
Ridges/upr slopes....Variable 2 to 4 mph...becoming southwest 5
to 6 mph in the afternoon.
* Mixing Height..........6100 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Partly cloudy then becoming mostly cloudy.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...56-64
Ridges/upr slopes....63-71
* Max Humidity.......
Valleys/lwr slopes...61-76 percent
Ridges/upr slopes....49-59 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 8 mph.
Ridges/upr slopes....Northwest winds 5 to 8 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY...
* Sky/Weather............Partly cloudy then becoming sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...88-96
Ridges/upr slopes....82-90
* Min Humidity.......
Valleys/lwr slopes...27-35 percent
Ridges/upr slopes....30-38 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
southwest 5 to 6 mph in the afternoon.
Ridges/upr slopes....Variable 2 to 4 mph...becoming southwest 5
to 6 mph in the afternoon.
* Mixing Height..........5600 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY NIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...54-61
Ridges/upr slopes....61-69
* Max Humidity.......
Valleys/lwr slopes...63-78 percent
Ridges/upr slopes....54-64 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 8 mph.
Ridges/upr slopes....Northwest winds 5 to 8 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ417-190115-
Southwestern Interior Mendocino Including Boonville-
1209 AM PDT Tue Aug 18 2026
.TODAY...
* Sky/Weather............Partly cloudy then becoming sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...80-88
Ridges/upr slopes....78-86
* Min Humidity.......
Valleys/lwr slopes...45-55 percent
Ridges/upr slopes....45-55 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 8 mph.
Ridges/upr slopes....Northwest winds 5 to 8 mph.
* Mixing Height..........3300 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Partly cloudy.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...53-61
Ridges/upr slopes....55-63
* Max Humidity.......
Valleys/lwr slopes...74-89 percent
Ridges/upr slopes....64-79 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 7 mph.
* Mixing Height..........300 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY...
* Sky/Weather............Partly cloudy then becoming sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...79-87
Ridges/upr slopes....77-85
* Min Humidity.......
Valleys/lwr slopes...49-59 percent
Ridges/upr slopes....50-60 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..........2800 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY NIGHT...
* Sky/Weather............Mostly clear. Patchy fog early in the
morning.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...52-58
Ridges/upr slopes....53-61
* Max Humidity.......
Valleys/lwr slopes...80-95 percent
Ridges/upr slopes....68-83 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.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ418-190115-
Northern Lake Including Gravelly Valley-
1209 AM PDT Tue Aug 18 2026
.TODAY...
* Sky/Weather............Partly cloudy then becoming sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...94-99
Ridges/upr slopes....80-88
* Min Humidity.......
Valleys/lwr slopes...18-24 percent
Ridges/upr slopes....21-29 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northeast winds 5 to 6 mph...shifting to
the southwest in the afternoon.
Ridges/upr slopes....Northeast winds 5 to 6 mph...shifting to
the southwest in the afternoon.
* Mixing Height..........7000 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Partly cloudy then becoming mostly cloudy.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...59-67
Ridges/upr slopes....64-71
* Max Humidity.......
Valleys/lwr slopes...51-61 percent
Ridges/upr slopes....39-49 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 6 mph...shifting to the
north after midnight.
Ridges/upr slopes....West winds 5 to 6 mph...shifting to the
north after midnight.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY...
* Sky/Weather............Mostly cloudy then becoming sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...95-100
Ridges/upr slopes....81-89
* Min Humidity.......
Valleys/lwr slopes...18-24 percent
Ridges/upr slopes....22-30 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....Northeast winds 5 mph...shifting to the
south 5 to 7 mph in the afternoon.
* Mixing Height..........7000 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY NIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...58-66
Ridges/upr slopes....63-70
* Max Humidity.......
Valleys/lwr slopes...46-56 percent
Ridges/upr slopes....35-45 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 7 mph...shifting to the
northwest 5 to 6 mph after midnight.
Ridges/upr slopes....West winds 5 to 7 mph...shifting to the
northwest 5 to 6 mph after midnight.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ419-190115-
Eastern Lake Including Clearlake and Middletown-
1209 AM PDT Tue Aug 18 2026
.TODAY...
* Sky/Weather............Partly cloudy then becoming sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...94-98
Ridges/upr slopes....87-92
* Min Humidity.......
Valleys/lwr slopes...17-25 percent
Ridges/upr slopes....17-25 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....Northeast winds 5 to 6 mph...shifting to
the east in the afternoon.
* Mixing Height..........6900 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Partly cloudy then becoming mostly cloudy.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...58-66
Ridges/upr slopes....64-72
* Max Humidity.......
Valleys/lwr slopes...57-72 percent
Ridges/upr slopes....47-57 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 7 mph.
Ridges/upr slopes....West winds 5 to 7 mph.
* Mixing Height..........500 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY...
* Sky/Weather............Mostly cloudy then becoming sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...95-99
Ridges/upr slopes....88-93
* Min Humidity.......
Valleys/lwr slopes...19-27 percent
Ridges/upr slopes....20-28 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....North winds 5 mph...shifting to the
southeast 5 to 7 mph in the afternoon.
* Mixing Height..........7400 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY NIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...57-65
Ridges/upr slopes....62-70
* Max Humidity.......
Valleys/lwr slopes...56-71 percent
Ridges/upr slopes....47-57 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 7 mph.
Ridges/upr slopes....West winds 5 to 7 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ420-190115-
Southern Lake Including Cobb and Konocti-
1209 AM PDT Tue Aug 18 2026
.TODAY...
* Sky/Weather............Partly cloudy then becoming sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...92-96
Ridges/upr slopes....82-90
* Min Humidity.......
Valleys/lwr slopes...23-31 percent
Ridges/upr slopes....27-35 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....Variable 2 to 4 mph...becoming south 5 to
6 mph in the afternoon.
* Mixing Height..........6700 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Partly cloudy then becoming mostly cloudy.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...60-68
Ridges/upr slopes....67-73
* Max Humidity.......
Valleys/lwr slopes...53-63 percent
Ridges/upr slopes....46-53 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 6 mph in the
evening...becoming downslope/downvalley 2
to 4 mph.
Ridges/upr slopes....West winds 5 to 7 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY...
* Sky/Weather............Mostly cloudy then becoming sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...92-97
Ridges/upr slopes....83-90
* Min Humidity.......
Valleys/lwr slopes...25-33 percent
Ridges/upr slopes....28-36 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....Variable 2 to 4 mph...becoming southwest 5
to 6 mph in the afternoon.
* Mixing Height..........7000 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY NIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...59-67
Ridges/upr slopes....66-71
* Max Humidity.......
Valleys/lwr slopes...51-61 percent
Ridges/upr slopes....43-52 percent
* 20-Foot Winds...
Valleys/lwr slopes...West winds 5 to 8 mph.
Ridges/upr slopes....West winds 5 to 8 mph.
* Mixing Height..........400 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
CAZ421-190115-
Western Lake Including Lakeport-
1209 AM PDT Tue Aug 18 2026
.TODAY...
* Sky/Weather............Partly cloudy then becoming sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...89-95
Ridges/upr slopes....85-90
* Min Humidity.......
Valleys/lwr slopes...24-32 percent
Ridges/upr slopes....24-29 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 2 to 4 mph...becoming
southwest 5 to 7 mph in the afternoon.
Ridges/upr slopes....Variable 2 to 4 mph...becoming southwest 5
to 6 mph in the afternoon.
* Mixing Height..........7000 ft AGL.
* Chc of Wetting Rain....0 percent.
.TONIGHT...
* Sky/Weather............Partly cloudy then becoming mostly cloudy.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...59-65
Ridges/upr slopes....64-72
* Max Humidity.......
Valleys/lwr slopes...58-73 percent
Ridges/upr slopes....44-54 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............Mostly cloudy then becoming sunny.
* Chance Lightning.......0%.
* Max Temperature.......
Valleys/lwr slopes...89-96
Ridges/upr slopes....85-90
* Min Humidity.......
Valleys/lwr slopes...24-32 percent
Ridges/upr slopes....25-31 percent
* 20-Foot Winds...
Valleys/lwr slopes...Upslope/upvalley 1 to 3 mph...becoming
south 5 mph in the afternoon.
Ridges/upr slopes....Variable 2 to 4 mph...becoming southwest 5
to 7 mph in the afternoon.
* Mixing Height..........7000 ft AGL.
* Chc of Wetting Rain....0 percent.
.WEDNESDAY NIGHT...
* Sky/Weather............Mostly clear.
* Chance Lightning.......0%.
* Min Temperature.......
Valleys/lwr slopes...57-63
Ridges/upr slopes....61-69
* Max Humidity.......
Valleys/lwr slopes...59-74 percent
Ridges/upr slopes....46-56 percent
* 20-Foot Winds...
Valleys/lwr slopes...Northwest winds 5 to 7 mph.
Ridges/upr slopes....Northwest winds 5 to 8 mph.
* Mixing Height..........500 ft AGL.
* Chc of Wetting Rain....0 percent.
$$
.EXTENDED FORECAST FOR DAYS 3 THROUGH 5...
...Northwest California Coast...
.THURSDAY...Mostly cloudy. Patchy fog in the morning. Patchy fog
in the evening, then areas of fog after midnight. Lows in the
lower to mid 50s. Highs 61 to 67. Northwest winds 5 mph.
.FRIDAY...Mostly cloudy. Areas of fog in the morning. Patchy fog
after midnight. Lows in the lower to mid 50s. Highs 59 to 65.
Northwest winds 5 mph.
.SATURDAY...Partly cloudy. Patchy fog in the morning. Patchy fog
after midnight. Lows in the lower to mid 50s. Highs 61 to 68.
North winds 5 mph.
...Northwest California Interior...
.THURSDAY...Partly cloudy. Lows 55 to 63. Highs 83 to 95. West
winds 5 mph.
.FRIDAY...Mostly clear. Lows 49 to 57. Highs 77 to 89. West winds
5 mph.
.SATURDAY...Mostly clear. Lows 53 to 61. Highs 78 to 90.
Northwest winds 5 mph.
.6 to 10 DAY OUTLOOK...Sunday August 23 THROUGH Thursday August 27, 2026...
FOR NW CALIF...ABOVE NORMAL TEMPERATURES AND NEAR NORMAL PRECIPITATION.
$$
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