375
FNUS56 KEKA 180733
FWFEKA
FIRE WEATHER PLANNING FORECAST FOR NORTHWEST CALIFORNIA
NATIONAL WEATHER SERVICE EUREKA CA
1233 AM PDT THU SEP 18 2025
...A REMNANT TROPICAL SYSTEM WILL BRING CHANCES FOR SHOWERS AND
SOME THUNDERSTORMS THURSDAY THROUGH SATURDAY
...BREEZY WINDS AND LOW RH THURSDAY AFTERNOON FOR LAKE COUNTY ZONE
264
DISCUSSION
NORTHEAST WINDS WILL BECOME BREEZY OVER THE
INTERIOR RIDGES OF DEL NORTE ZONE 203. THESE WINDS WILL PERSIST
INTO FRIDAY MORNING. A REMNANT TROPICAL SYSTEM IS PUSHING
MOISTURE IN FROM THE SOUTH. SHOWERS WILL MOVE IN
THURSDAY WITH A SLIGHT CHANCE FOR THUNDERSTORMS (10-15%) FOR
MAINLY MENDOCINO, LAKE AND SOUTHERN TRINITY COUNTIES THROUGH
THURSDAY AFTERNOON. THESE INITIAL STORMS WOULD BE MORE DRY IN
NATURE, BUT CONFIDENCE IS LOW ON AVAILABLE INSTABILITY AT THAT
TIME. MOISTURE AND INSTABILITY INCREASE LATE THURSDAY AND FRIDAY
WHEN BETTER CONFIDENCE FOR ISOLATED THUNDERSTORMS AND A POTENTIAL
(45%) WETTING RAINFALL FROM SHOWERS AND MORE RAIN PRODUCTIVE
THUNDERSTORMS. THUNDERSTORM FORMATION FRIDAY WILL BE SOMEWHAT
DEPENDENT ON HOW MUCH CLEARING CAN OCCUR THROUGH THE AFTERNOON.
SHOWER AND THUNDERSTORM CHANCES CONTINUE TO SATURDAY FOR MAINLY
TRINITY COUNTY.
CAZ201-190115-
NORTH COAST-
1233 AM PDT THU SEP 18 2025
TODAY
* SKY/WEATHER............MOSTLY CLOUDY. PATCHY DENSE FOG LATE IN
THE MORNING.
* CHANCE LIGHTNING.......0% INCREASING TO 10% IN THE AFTERNOON.
* MAX TEMPERATURE.......
VALLEYS/LWR SLOPES...73-81
RIDGES/UPR SLOPES....69-77
* MIN HUMIDITY.......
VALLEYS/LWR SLOPES...74-84 PERCENT
RIDGES/UPR SLOPES....66-76 PERCENT
* 20-FOOT WINDS...
VALLEYS/LWR SLOPES...NORTHWEST WINDS 5 TO 8 MPH.
RIDGES/UPR SLOPES....NORTHWEST WINDS 5 TO 8 MPH.
* MIXING HEIGHT..........1900 FT AGL.
* CHC OF WETTING RAIN....0 PERCENT.
TONIGHT
* SKY/WEATHER............MOSTLY CLOUDY. SLIGHT CHANCE OF RAIN LATE
IN THE EVENING. SLIGHT CHANCE OF SHOWERS
AFTER MIDNIGHT. PATCHY DENSE FOG AFTER
MIDNIGHT.
* CHANCE LIGHTNING.......10%.
* MIN TEMPERATURE.......
VALLEYS/LWR SLOPES...55-60
RIDGES/UPR SLOPES....55-62
* MAX HUMIDITY.......
VALLEYS/LWR SLOPES...77-92 PERCENT
RIDGES/UPR SLOPES....66-81 PERCENT
* 20-FOOT WINDS...
VALLEYS/LWR SLOPES...NORTHWEST WINDS 5 TO 7 MPH.
RIDGES/UPR SLOPES....EAST WINDS 5 TO 6 MPH.
* MIXING HEIGHT..........0 FT AGL.
* CHC OF WETTING RAIN....0 PERCENT.
FRIDAY
* SKY/WEATHER............MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS
THROUGH THE DAY. SLIGHT CHANCE OF RAIN IN
THE LATE MORNING AND AFTERNOON.
* MAX TEMPERATURE.......
VALLEYS/LWR SLOPES...71-79
RIDGES/UPR SLOPES....68-76
* MIN HUMIDITY.......
VALLEYS/LWR SLOPES...68-83 PERCENT
RIDGES/UPR SLOPES....64-74 PERCENT
* 20-FOOT WINDS...
VALLEYS/LWR SLOPES...SOUTHEAST WINDS 5 MPH...SHIFTING TO THE
WEST 5 TO 6 MPH IN THE AFTERNOON.
RIDGES/UPR SLOPES....SOUTHEAST WINDS 5 TO 6 MPH...SHIFTING TO
THE SOUTHWEST 5 TO 7 MPH IN THE AFTERNOON.
* MIXING HEIGHT..........2100 FT AGL.
* CHC OF WETTING RAIN....0 PERCENT.
FRIDAY NIGHT
* SKY/WEATHER............MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY.
SLIGHT CHANCE OF RAIN THROUGH THE NIGHT.
PATCHY DENSE FOG LATE IN THE EVENING.
PATCHY FOG EARLY IN THE MORNING.
* MIN TEMPERATURE.......
VALLEYS/LWR SLOPES...54-58
RIDGES/UPR SLOPES....54-60
* MAX HUMIDITY.......
VALLEYS/LWR SLOPES...82-97 PERCENT
RIDGES/UPR SLOPES....73-88 PERCENT
* 20-FOOT WINDS...
VALLEYS/LWR SLOPES...SOUTHWEST WINDS 5 TO 6 MPH IN THE
EVENING...BECOMING LIGHT WINDS 2 TO 4 MPH.
RIDGES/UPR SLOPES....SOUTHWEST WINDS 5 TO 6 MPH...SHIFTING TO
THE SOUTHEAST 5 MPH AFTER MIDNIGHT.
* MIXING HEIGHT..........0 FT AGL.
* CHC OF WETTING RAIN....0 PERCENT.
CAZ202-190115-
COASTAL MENDOCINO-
1233 AM PDT THU SEP 18 2025
TODAY
* SKY/WEATHER............MOSTLY CLOUDY. SLIGHT CHANCE OF RAIN LATE
IN THE AFTERNOON.
* CHANCE LIGHTNING.......10%.
* MAX TEMPERATURE.......
VALLEYS/LWR SLOPES...69-77
RIDGES/UPR SLOPES....73-81
* MIN HUMIDITY.......
VALLEYS/LWR SLOPES...66-81 PERCENT
RIDGES/UPR SLOPES....55-65 PERCENT
* 20-FOOT WINDS...
VALLEYS/LWR SLOPES...SOUTHWEST WINDS 5 TO 7 MPH.
RIDGES/UPR SLOPES....SOUTHWEST WINDS 5 TO 8 MPH.
* MIXING HEIGHT..........1200 FT AGL.
* CHC OF WETTING RAIN....0 PERCENT.
TONIGHT
* SKY/WEATHER............MOSTLY CLOUDY. SLIGHT CHANCE OF RAIN EARLY
IN THE EVENING. SLIGHT CHANCE OF SHOWERS
AND THUNDERSTORMS IN THE LATE EVENING AND
OVERNIGHT.
* CHANCE LIGHTNING.......20%.
* MIN TEMPERATURE.......
VALLEYS/LWR SLOPES...55-58
RIDGES/UPR SLOPES....52-59
* MAX HUMIDITY.......
VALLEYS/LWR SLOPES...84-99 PERCENT
RIDGES/UPR SLOPES....79-94 PERCENT
* 20-FOOT WINDS...
VALLEYS/LWR SLOPES...LIGHT WINDS 1 TO 3 MPH.
RIDGES/UPR SLOPES....VARIABLE 2 TO 4 MPH...BECOMING EAST 5 TO 6
MPH AFTER MIDNIGHT.
* MIXING HEIGHT..........100 FT AGL.
* CHC OF WETTING RAIN....0 PERCENT.
FRIDAY
* SKY/WEATHER............MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY.
SLIGHT CHANCE OF SHOWERS IN THE MORNING.
SLIGHT CHANCE OF RAIN IN THE LATE MORNING
AND AFTERNOON.
* MAX TEMPERATURE.......
VALLEYS/LWR SLOPES...67-75
RIDGES/UPR SLOPES....69-77
* MIN HUMIDITY.......
VALLEYS/LWR SLOPES...70-85 PERCENT
RIDGES/UPR SLOPES....61-71 PERCENT
* 20-FOOT WINDS...
VALLEYS/LWR SLOPES...UPSLOPE/UPVALLEY 2 TO 5 MPH...BECOMING
SOUTHWEST 5 TO 8 MPH IN THE AFTERNOON.
RIDGES/UPR SLOPES....SOUTHEAST WINDS 5 TO 6 MPH...SHIFTING TO
THE SOUTHWEST 5 TO 8 MPH IN THE AFTERNOON.
* MIXING HEIGHT..........1600 FT AGL.
* CHC OF WETTING RAIN....10 PERCENT.
FRIDAY NIGHT
* SKY/WEATHER............PARTLY CLOUDY. SLIGHT CHANCE OF RAIN
THROUGH THE NIGHT. PATCHY FOG IN THE LATE
EVENING AND OVERNIGHT.
* MIN TEMPERATURE.......
VALLEYS/LWR SLOPES...54-57
RIDGES/UPR SLOPES....50-57
* MAX HUMIDITY.......
VALLEYS/LWR SLOPES...87-100 PERCENT
RIDGES/UPR SLOPES....81-96 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....SOUTH WINDS 5 TO 6 MPH IN THE
EVENING...BECOMING DOWNSLOPE/DOWNVALLEY 2
TO 4 MPH.
* MIXING HEIGHT..........100 FT AGL.
* CHC OF WETTING RAIN....0 PERCENT.
CAZ203-204-190115-
UPPER SMITH-LOWER MIDDLE KLAMATH-
1233 AM PDT THU SEP 18 2025
TODAY
* SKY/WEATHER............SUNNY THEN BECOMING PARTLY CLOUDY THEN
BECOMING MOSTLY CLOUDY.
* CHANCE LIGHTNING.......10%.
* MAX TEMPERATURE.......
VALLEYS/LWR SLOPES...83-91
RIDGES/UPR SLOPES....72-80
* MIN HUMIDITY.......
VALLEYS/LWR SLOPES...37-47 PERCENT
RIDGES/UPR SLOPES....37-47 PERCENT
* 20-FOOT WINDS...
VALLEYS/LWR SLOPES...NORTHEAST WINDS 8 TO 15 MPH...SHIFTING TO
THE WEST IN THE AFTERNOON.
RIDGES/UPR SLOPES....NORTHEAST WINDS 5 TO 10 MPH...SHIFTING TO
THE NORTH IN THE AFTERNOON.
* MIXING HEIGHT..........4900 FT AGL.
* CHC OF WETTING RAIN....0 PERCENT.
TONIGHT
* SKY/WEATHER............MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS
EARLY IN THE EVENING. SLIGHT CHANCE OF
SHOWERS AFTER MIDNIGHT.
* CHANCE LIGHTNING.......10%.
* MIN TEMPERATURE.......
VALLEYS/LWR SLOPES...57-63
RIDGES/UPR SLOPES....59-63
* MAX HUMIDITY.......
VALLEYS/LWR SLOPES...65-80 PERCENT
RIDGES/UPR SLOPES....48-58 PERCENT
* 20-FOOT WINDS...
VALLEYS/LWR SLOPES...SOUTHEAST WINDS 8 TO 15 MPH...SHIFTING TO
THE NORTHEAST 5 TO 11 MPH AFTER MIDNIGHT.
RIDGES/UPR SLOPES....EAST WINDS 5 TO 10 MPH.
* MIXING HEIGHT..........0 FT AGL.
* CHC OF WETTING RAIN....0 PERCENT.
FRIDAY
* SKY/WEATHER............MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY.
SLIGHT CHANCE OF SHOWERS THROUGH THE DAY.
SLIGHT CHANCE OF RAIN IN THE LATE MORNING
AND AFTERNOON. SLIGHT CHANCE OF
THUNDERSTORMS LATE IN THE AFTERNOON.
* MAX TEMPERATURE.......
VALLEYS/LWR SLOPES...81-89
RIDGES/UPR SLOPES....69-77
* MIN HUMIDITY.......
VALLEYS/LWR SLOPES...42-52 PERCENT
RIDGES/UPR SLOPES....39-48 PERCENT
* 20-FOOT WINDS...
VALLEYS/LWR SLOPES...NORTHEAST WINDS 5 TO 6 MPH...SHIFTING TO
THE WEST IN THE AFTERNOON.
RIDGES/UPR SLOPES....EAST WINDS 5 TO 7 MPH...SHIFTING TO THE
WEST 5 TO 6 MPH IN THE AFTERNOON.
* MIXING HEIGHT..........4400 FT AGL.
* CHC OF WETTING RAIN....0 PERCENT.
FRIDAY NIGHT
* SKY/WEATHER............MOSTLY CLOUDY. CHANCE OF SHOWERS THROUGH
THE NIGHT.
* MIN TEMPERATURE.......
VALLEYS/LWR SLOPES...AROUND 60
RIDGES/UPR SLOPES....AROUND 60
* MAX HUMIDITY.......
VALLEYS/LWR SLOPES...78-93 PERCENT
RIDGES/UPR SLOPES....55-68 PERCENT
* 20-FOOT WINDS...
VALLEYS/LWR SLOPES...SOUTHWEST WINDS 5 TO 6 MPH IN THE
EVENING...BECOMING LIGHT WINDS 2 TO 4 MPH.
RIDGES/UPR SLOPES....WEST WINDS 5 TO 6 MPH IN THE
EVENING...BECOMING LIGHT WINDS 2 TO 4 MPH.
* MIXING HEIGHT..........0 FT AGL.
* CHC OF WETTING RAIN....0 PERCENT.
CAZ211-212-190115-
HOOPA-VAN DUZEN/MAD RIVER-
1233 AM PDT THU SEP 18 2025
TODAY
* SKY/WEATHER............PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY.
SLIGHT CHANCE OF RAIN EARLY IN THE
AFTERNOON. SLIGHT CHANCE OF SHOWERS AND
ISOLATED THUNDERSTORMS LATE IN THE
AFTERNOON.
* CHANCE LIGHTNING.......20%.
* MAX TEMPERATURE.......
VALLEYS/LWR SLOPES...85-93
RIDGES/UPR SLOPES....77-85
* MIN HUMIDITY.......
VALLEYS/LWR SLOPES...33-41 PERCENT
RIDGES/UPR SLOPES....34-42 PERCENT
* 20-FOOT WINDS...
VALLEYS/LWR SLOPES...NORTHWEST WINDS 5 TO 7 MPH.
RIDGES/UPR SLOPES....EAST WINDS 5 TO 6 MPH...SHIFTING TO THE
SOUTHWEST IN THE AFTERNOON.
* MIXING HEIGHT..........4700 FT AGL.
* CHC OF WETTING RAIN....0 PERCENT.
TONIGHT
* SKY/WEATHER............MOSTLY CLOUDY. SLIGHT CHANCE OF
THUNDERSTORMS IN THE EVENING. SLIGHT
CHANCE OF SHOWERS THROUGH THE NIGHT.
* CHANCE LIGHTNING.......20%.
* MIN TEMPERATURE.......
VALLEYS/LWR SLOPES...58-62
RIDGES/UPR SLOPES....54-62
* MAX HUMIDITY.......
VALLEYS/LWR SLOPES...74-89 PERCENT
RIDGES/UPR SLOPES....62-77 PERCENT
* 20-FOOT WINDS...
VALLEYS/LWR SLOPES...NORTHEAST WINDS 5 TO 7 MPH.
RIDGES/UPR SLOPES....EAST WINDS 5 TO 8 MPH INCREASING TO 5 TO
12 MPH AFTER MIDNIGHT.
* MIXING HEIGHT..........0 FT AGL.
* CHC OF WETTING RAIN....0 PERCENT.
FRIDAY
* SKY/WEATHER............MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS
THROUGH THE DAY. ISOLATED THUNDERSTORMS IN
THE LATE MORNING AND AFTERNOON.
* MAX TEMPERATURE.......
VALLEYS/LWR SLOPES...81-89
RIDGES/UPR SLOPES....71-79
* MIN HUMIDITY.......
VALLEYS/LWR SLOPES...41-51 PERCENT
RIDGES/UPR SLOPES....44-54 PERCENT
* 20-FOOT WINDS...
VALLEYS/LWR SLOPES...SOUTHEAST WINDS 5 TO 6 MPH...SHIFTING TO
THE WEST IN THE AFTERNOON.
RIDGES/UPR SLOPES....EAST WINDS 5 TO 12 MPH...SHIFTING TO THE
WEST 5 TO 6 MPH IN THE AFTERNOON.
* MIXING HEIGHT..........4200 FT AGL.
* CHC OF WETTING RAIN....10 PERCENT.
FRIDAY NIGHT
* SKY/WEATHER............MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY.
SLIGHT CHANCE OF RAIN IN THE EVENING.
* MIN TEMPERATURE.......
VALLEYS/LWR SLOPES...56-60
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...NORTHWEST 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
SOUTHEAST 5 MPH AFTER MIDNIGHT.
* MIXING HEIGHT..........0 FT AGL.
* CHC OF WETTING RAIN....0 PERCENT.
CAZ283-190115-
TRINITY-
1233 AM PDT THU SEP 18 2025
TODAY
* SKY/WEATHER............PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY.
SLIGHT CHANCE OF SHOWERS AND ISOLATED
THUNDERSTORMS LATE IN THE AFTERNOON.
* CHANCE LIGHTNING.......10%.
* MAX TEMPERATURE.......
VALLEYS/LWR SLOPES...87-94
RIDGES/UPR SLOPES....74-82
* MIN HUMIDITY.......
VALLEYS/LWR SLOPES...19-24 PERCENT
RIDGES/UPR SLOPES....22-30 PERCENT
* 20-FOOT WINDS...
VALLEYS/LWR SLOPES...LIGHT WINDS 2 TO 4 MPH...BECOMING
SOUTHEAST 5 TO 7 MPH IN THE AFTERNOON.
RIDGES/UPR SLOPES....EAST WINDS 5 TO 6 MPH...SHIFTING TO THE
SOUTH 5 TO 7 MPH IN THE AFTERNOON.
* MIXING HEIGHT..........7700 FT AGL.
* CHC OF WETTING RAIN....0 PERCENT.
TONIGHT
* SKY/WEATHER............MOSTLY CLOUDY. SLIGHT CHANCE OF
THUNDERSTORMS IN THE EVENING. SLIGHT
CHANCE OF SHOWERS THROUGH THE NIGHT.
* CHANCE LIGHTNING.......20%.
* MIN TEMPERATURE.......
VALLEYS/LWR SLOPES...AROUND 60
RIDGES/UPR SLOPES....52-60
* MAX HUMIDITY.......
VALLEYS/LWR SLOPES...65-77 PERCENT
RIDGES/UPR SLOPES....53-68 PERCENT
* 20-FOOT WINDS...
VALLEYS/LWR SLOPES...EAST WINDS 5 TO 8 MPH.
RIDGES/UPR SLOPES....EAST WINDS 5 TO 9 MPH.
* MIXING HEIGHT..........0 FT AGL.
* CHC OF WETTING RAIN....0 PERCENT.
FRIDAY
* SKY/WEATHER............MOSTLY CLOUDY. CHANCE OF SHOWERS AND
ISOLATED THUNDERSTORMS.
* MAX TEMPERATURE.......
VALLEYS/LWR SLOPES...77-84
RIDGES/UPR SLOPES....66-74
* MIN HUMIDITY.......
VALLEYS/LWR SLOPES...34-43 PERCENT
RIDGES/UPR SLOPES....41-51 PERCENT
* 20-FOOT WINDS...
VALLEYS/LWR SLOPES...EAST WINDS 5 TO 8 MPH.
RIDGES/UPR SLOPES....EAST WINDS 5 TO 8 MPH.
* MIXING HEIGHT..........4800 FT AGL.
* CHC OF WETTING RAIN....10 PERCENT.
FRIDAY NIGHT
* SKY/WEATHER............MOSTLY CLOUDY. CHANCE OF SHOWERS AND
ISOLATED THUNDERSTORMS THROUGH THE NIGHT.
SLIGHT CHANCE OF RAIN IN THE LATE EVENING
AND OVERNIGHT.
* MIN TEMPERATURE.......
VALLEYS/LWR SLOPES...55-59
RIDGES/UPR SLOPES....50-58
* MAX HUMIDITY.......
VALLEYS/LWR SLOPES...81-91 PERCENT
RIDGES/UPR SLOPES....65-80 PERCENT
* 20-FOOT WINDS...
VALLEYS/LWR SLOPES...LIGHT WINDS 1 TO 3 MPH.
RIDGES/UPR SLOPES....SOUTHWEST WINDS 5 MPH IN THE
EVENING...BECOMING LIGHT WINDS 2 TO 4 MPH.
* MIXING HEIGHT..........0 FT AGL.
* CHC OF WETTING RAIN....10 PERCENT.
CAZ276-190115-
INTERIOR MENDOCINO-
1233 AM PDT THU SEP 18 2025
TODAY
* SKY/WEATHER............MOSTLY CLOUDY. SLIGHT CHANCE OF RAIN IN
THE AFTERNOON.
* CHANCE LIGHTNING.......10%.
* MAX TEMPERATURE.......
VALLEYS/LWR SLOPES...84-92
RIDGES/UPR SLOPES....79-87
* MIN HUMIDITY.......
VALLEYS/LWR SLOPES...35-43 PERCENT
RIDGES/UPR SLOPES....37-47 PERCENT
* 20-FOOT WINDS...
VALLEYS/LWR SLOPES...SOUTH WINDS 5 TO 9 MPH.
RIDGES/UPR SLOPES....SOUTH WINDS 5 TO 9 MPH.
* MIXING HEIGHT..........5100 FT AGL.
* CHC OF WETTING RAIN....0 PERCENT.
TONIGHT
* SKY/WEATHER............MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS
AND THUNDERSTORMS THROUGH THE NIGHT.
* CHANCE LIGHTNING.......20%.
* MIN TEMPERATURE.......
VALLEYS/LWR SLOPES...55-63
RIDGES/UPR SLOPES....55-63
* MAX HUMIDITY.......
VALLEYS/LWR SLOPES...75-90 PERCENT
RIDGES/UPR SLOPES....70-85 PERCENT
* 20-FOOT WINDS...
VALLEYS/LWR SLOPES...SOUTHEAST WINDS 5 TO 7 MPH.
RIDGES/UPR SLOPES....SOUTHEAST WINDS 5 TO 8 MPH.
* MIXING HEIGHT..........0 FT AGL.
* CHC OF WETTING RAIN....0 PERCENT.
FRIDAY
* SKY/WEATHER............MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY.
CHANCE OF SHOWERS EARLY IN THE MORNING,
THEN SLIGHT CHANCE OF RAIN IN THE LATE
MORNING AND AFTERNOON.
* MAX TEMPERATURE.......
VALLEYS/LWR SLOPES...77-85
RIDGES/UPR SLOPES....73-80
* MIN HUMIDITY.......
VALLEYS/LWR SLOPES...46-56 PERCENT
RIDGES/UPR SLOPES....52-62 PERCENT
* 20-FOOT WINDS...
VALLEYS/LWR SLOPES...SOUTHEAST WINDS 5 TO 6 MPH...SHIFTING TO
THE SOUTHWEST IN THE AFTERNOON.
RIDGES/UPR SLOPES....SOUTHEAST WINDS 5 TO 6 MPH...SHIFTING TO
THE SOUTHWEST 5 TO 7 MPH IN THE AFTERNOON.
* MIXING HEIGHT..........4100 FT AGL.
* CHC OF WETTING RAIN....10 PERCENT.
FRIDAY NIGHT
* SKY/WEATHER............PARTLY CLOUDY. SLIGHT CHANCE OF RAIN
THROUGH THE NIGHT.
* MIN TEMPERATURE.......
VALLEYS/LWR SLOPES...53-61
RIDGES/UPR SLOPES....53-61
* MAX HUMIDITY.......
VALLEYS/LWR SLOPES...80-95 PERCENT
RIDGES/UPR SLOPES....73-88 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 MPH IN THE
EVENING...BECOMING DOWNSLOPE/DOWNVALLEY 2
TO 4 MPH.
* MIXING HEIGHT..........0 FT AGL.
* CHC OF WETTING RAIN....0 PERCENT.
CAZ277-190115-
W MENDOCINO NF/E MENDOCINO UNIT-
1233 AM PDT THU SEP 18 2025
TODAY
* SKY/WEATHER............MOSTLY CLOUDY. SLIGHT CHANCE OF RAIN EARLY
IN THE AFTERNOON. SLIGHT CHANCE OF SHOWERS
AND ISOLATED THUNDERSTORMS LATE IN THE
AFTERNOON.
* CHANCE LIGHTNING.......20%.
* MAX TEMPERATURE.......
VALLEYS/LWR SLOPES...87-95
RIDGES/UPR SLOPES....76-84
* MIN HUMIDITY.......
VALLEYS/LWR SLOPES...23-28 PERCENT
RIDGES/UPR SLOPES....26-34 PERCENT
* 20-FOOT WINDS...
VALLEYS/LWR SLOPES...SOUTHWEST WINDS 5 TO 8 MPH.
RIDGES/UPR SLOPES....SOUTHWEST WINDS 5 TO 8 MPH.
* MIXING HEIGHT..........6900 FT AGL.
* CHC OF WETTING RAIN....0 PERCENT.
TONIGHT
* SKY/WEATHER............MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS
UNTIL EARLY MORNING. SLIGHT CHANCE OF
THUNDERSTORMS THROUGH THE NIGHT. CHANCE OF
SHOWERS EARLY IN THE MORNING.
* CHANCE LIGHTNING.......20%.
* MIN TEMPERATURE.......
VALLEYS/LWR SLOPES...55-63
RIDGES/UPR SLOPES....56-62
* MAX HUMIDITY.......
VALLEYS/LWR SLOPES...72-87 PERCENT
RIDGES/UPR SLOPES....56-71 PERCENT
* 20-FOOT WINDS...
VALLEYS/LWR SLOPES...EAST WINDS 5 TO 8 MPH.
RIDGES/UPR SLOPES....EAST WINDS 7 TO 14 MPH.
* MIXING HEIGHT..........0 FT AGL.
* CHC OF WETTING RAIN....20 PERCENT.
FRIDAY
* SKY/WEATHER............MOSTLY CLOUDY. CHANCE OF SHOWERS EARLY IN
THE MORNING, THEN CHANCE OF RAIN LATE IN
THE MORNING. ISOLATED THUNDERSTORMS IN THE
LATE MORNING AND AFTERNOON. CHANCE OF
SHOWERS IN THE AFTERNOON.
* MAX TEMPERATURE.......
VALLEYS/LWR SLOPES...79-87
RIDGES/UPR SLOPES....67-75
* MIN HUMIDITY.......
VALLEYS/LWR SLOPES...39-49 PERCENT
RIDGES/UPR SLOPES....48-58 PERCENT
* 20-FOOT WINDS...
VALLEYS/LWR SLOPES...EAST WINDS 5 TO 8 MPH...SHIFTING TO THE
SOUTHWEST 5 TO 6 MPH IN THE AFTERNOON.
RIDGES/UPR SLOPES....NORTHEAST WINDS 7 TO 14 MPH...SHIFTING TO
THE SOUTHWEST 5 MPH IN THE AFTERNOON.
* MIXING HEIGHT..........4800 FT AGL.
* CHC OF WETTING RAIN....30 PERCENT.
FRIDAY NIGHT
* SKY/WEATHER............MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY.
CHANCE OF SHOWERS AND ISOLATED
THUNDERSTORMS IN THE EVENING. SLIGHT
CHANCE OF RAIN IN THE LATE EVENING AND
OVERNIGHT.
* MIN TEMPERATURE.......
VALLEYS/LWR SLOPES...52-60
RIDGES/UPR SLOPES....54-60
* MAX HUMIDITY.......
VALLEYS/LWR SLOPES...77-92 PERCENT
RIDGES/UPR SLOPES....64-79 PERCENT
* 20-FOOT WINDS...
VALLEYS/LWR SLOPES...WEST WINDS 5 MPH IN THE EVENING...BECOMING
DOWNSLOPE/DOWNVALLEY 1 TO 3 MPH.
RIDGES/UPR SLOPES....WEST WINDS 5 TO 6 MPH IN THE
EVENING...BECOMING DOWNSLOPE/DOWNVALLEY 2
TO 4 MPH.
* MIXING HEIGHT..........0 FT AGL.
* CHC OF WETTING RAIN....0 PERCENT.
CAZ264-190115-
LAKE COUNTY PORTION OF LAKE/NAPA/SONOMA RU-
1233 AM PDT THU SEP 18 2025
TODAY
* SKY/WEATHER............MOSTLY CLOUDY. SLIGHT CHANCE OF RAIN EARLY
IN THE AFTERNOON. SLIGHT CHANCE OF SHOWERS
AND ISOLATED THUNDERSTORMS LATE IN THE
AFTERNOON.
* CHANCE LIGHTNING.......10% INCREASING TO 20% IN THE AFTERNOON.
* MAX TEMPERATURE.......
VALLEYS/LWR SLOPES...AROUND 88
RIDGES/UPR SLOPES....79-85
* MIN HUMIDITY.......
VALLEYS/LWR SLOPES...21 PERCENT
RIDGES/UPR SLOPES....25-32 PERCENT
* 20-FOOT WINDS...
VALLEYS/LWR SLOPES...LIGHT WINDS 2 TO 4 MPH...BECOMING SOUTH 5
MPH IN THE AFTERNOON.
RIDGES/UPR SLOPES....SOUTH WINDS 5 TO 9 MPH.
* MIXING HEIGHT..........6500 FT AGL.
* CHC OF WETTING RAIN....0 PERCENT.
TONIGHT
* SKY/WEATHER............MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS IN
THE EVENING. SLIGHT CHANCE OF
THUNDERSTORMS THROUGH THE NIGHT. CHANCE OF
SHOWERS AFTER MIDNIGHT.
* CHANCE LIGHTNING.......20%.
* MIN TEMPERATURE.......
VALLEYS/LWR SLOPES...AROUND 59
RIDGES/UPR SLOPES....61-67
* MAX HUMIDITY.......
VALLEYS/LWR SLOPES...77 PERCENT
RIDGES/UPR SLOPES....54-69 PERCENT
* 20-FOOT WINDS...
VALLEYS/LWR SLOPES...LIGHT WINDS 2 TO 4 MPH...BECOMING
SOUTHEAST 5 MPH AFTER MIDNIGHT.
RIDGES/UPR SLOPES....SOUTH WINDS 5 TO 9 MPH...SHIFTING TO THE
EAST 6 TO 13 MPH AFTER MIDNIGHT.
* MIXING HEIGHT..........0 FT AGL.
* CHC OF WETTING RAIN....0 PERCENT.
FRIDAY
* SKY/WEATHER............MOSTLY CLOUDY. CHANCE OF SHOWERS EARLY IN
THE MORNING, THEN CHANCE OF RAIN IN THE
LATE MORNING AND AFTERNOON.
* MAX TEMPERATURE.......
VALLEYS/LWR SLOPES...AROUND 78
RIDGES/UPR SLOPES....69-75
* MIN HUMIDITY.......
VALLEYS/LWR SLOPES...44 PERCENT
RIDGES/UPR SLOPES....48-58 PERCENT
* 20-FOOT WINDS...
VALLEYS/LWR SLOPES...LIGHT WINDS 2 TO 4 MPH...BECOMING
SOUTHEAST 5 TO 6 MPH IN THE AFTERNOON.
RIDGES/UPR SLOPES....EAST WINDS 6 TO 13 MPH...SHIFTING TO THE
SOUTHEAST 5 TO 6 MPH IN THE AFTERNOON.
* MIXING HEIGHT..........4400 FT AGL.
* CHC OF WETTING RAIN....20 PERCENT.
FRIDAY NIGHT
* SKY/WEATHER............PARTLY CLOUDY.
* MIN TEMPERATURE.......
VALLEYS/LWR SLOPES...AROUND 56
RIDGES/UPR SLOPES....61-65
* MAX HUMIDITY.......
VALLEYS/LWR SLOPES...85 PERCENT
RIDGES/UPR SLOPES....56-70 PERCENT
* 20-FOOT WINDS...
VALLEYS/LWR SLOPES...DOWNSLOPE/DOWNVALLEY 1 TO 3 MPH.
RIDGES/UPR SLOPES....SOUTHWEST WINDS 5 TO 7 MPH.
* MIXING HEIGHT..........0 FT AGL.
* CHC OF WETTING RAIN....0 PERCENT.
EXTENDED FORECAST FOR DAYS 3 THROUGH 5
..NORTHWEST CALIFORNIA COAST
SATURDAY
MOSTLY CLOUDY. PATCHY FOG IN THE MORNING. LOWS IN THE
LOWER TO MID 50S. HIGHS 64 TO 70. WINDS GENERALLY LESS THAN
5 MPH.
SUNDAY
PARTLY CLOUDY. LOWS IN THE LOWER TO MID 50S. HIGHS
65 TO 71. NORTH WINDS 5 MPH.
MONDAY
PARTLY CLOUDY. LOWS IN THE MID TO UPPER 50S. HIGHS
67 TO 74. NORTH WINDS 5 MPH.
..NORTHWEST CALIFORNIA INTERIOR
SATURDAY
PARTLY CLOUDY. LOWS 53 TO 61. HIGHS 78 TO 87. WEST
WINDS 5 MPH.
SUNDAY
CLEAR. LOWS 55 TO 63. HIGHS 80 TO 90. NORTHWEST WINDS
5 MPH.
MONDAY
MOSTLY CLEAR. LOWS 57 TO 65. HIGHS 86 TO 96. NORTHWEST
WINDS 5 MPH.
6 TO 10 DAY OUTLOOK
TUESDAY SEPTEMBER 23 THROUGH SATURDAY SEPTEMBER 27, 2025...
FOR NW CALIF...ABOVE NORMAL TEMPERATURES AND ABOVE NORMAL PRECIPITATION.
VISIT US AT WWW.WEATHER.GOV/EUREKA
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