343
FNUS56 KSTO 210730
FWFSTO
FIRE WEATHER PLANNING FORECAST FOR INTERIOR NORTHERN CALIFORNIA
NATIONAL WEATHER SERVICE SACRAMENTO CA
1230 AM PDT THU AUG 21 2025
NOTE: THIS PRODUCT HAS UPDATED FORECAST DATA BUT THE FORECAST
DISCUSSION IS FROM THE PREVIOUS DAY.
...HOT AND DRY CONDITIONS WILL LEAD TO ELEVATED FIRE WEATHER
CONCERNS ON THURSDAY AND FRIDAY...
DISCUSSION
DRY AND BREEZY CONDITIONS CONTINUE TODAY. TEMPERATURES TREND
HOTTER AND WELL ABOVE NORMAL THURSDAY INTO THE WEEKEND WITH LOW
DAYTIME HUMIDITY AND POOR TO MODERATE OVERNIGHT RECOVERY.THESE
CONDITIONS WILL BRING ELEVATED FIRE WEATHER CONCERNS TO THE
NORTHERN SACRAMENTO VALLEY AND ADJACENT TERRAIN. ISOLATED MOUNTAIN
THUNDERSTORM CHANCES INCREASE THIS WEEKEND AND EARLY NEXT WEEK
OVER THE SIERRA AND SOUTHERN CASCADES.
CAZ213-220000-
EASTERN PORTION OF SHASTA-TRINITY NF-
1230 AM PDT THU AUG 21 2025
TODAY
* SKY/WEATHER............SUNNY.
* MAX TEMPERATURE........101-106 LOWER ELEVATIONS...EXCEPT 91-100
HIGHER ELEVATIONS.
* 24 HR TREND..........6 DEGREES WARMER.
* MIN HUMIDITY...........8-13 PERCENT.
* 24 HR TREND..........7 PERCENT DOWN.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...NORTH WINDS 5 TO 11 MPH IN THE MORNING
BECOMING UPSLOPE UP TO 5 MPH.
* RIDGES/UPR SLOPES....NORTHEAST WINDS 7 TO 13 MPH SHIFTING TO THE
SOUTH UP TO 8 MPH IN THE AFTERNOON.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........9600 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
TONIGHT
* SKY/WEATHER............CLEAR.
* MIN TEMPERATURE........68-73 LOWER ELEVATIONS...EXCEPT 58-68
HIGHER ELEVATIONS.
* 24 HR TREND..........LITTLE CHANGE.
* MAX HUMIDITY...........31-46 PERCENT.
* 24 HR TREND..........9 PERCENT DOWN.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...DRAINAGE WINDS UP TO 5 MPH BECOMING NORTH UP
TO 7 MPH AFTER MIDNIGHT.
* RIDGES/UPR SLOPES....WEST WINDS UP TO 8 MPH SHIFTING TO THE NORTH
4 TO 9 MPH AFTER MIDNIGHT.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........700 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
FRIDAY
* SKY/WEATHER............MOSTLY SUNNY.
* MAX TEMPERATURE........100-105 LOWER ELEVATIONS...EXCEPT 90-100
HIGHER ELEVATIONS.
* MIN HUMIDITY...........8-17 PERCENT.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...NORTH WINDS UP TO 7 MPH IN THE MORNING
BECOMING UPSLOPE UP TO 5 MPH.
* RIDGES/UPR SLOPES....NORTHEAST WINDS 4 TO 9 MPH SHIFTING TO THE
SOUTH UP TO 7 MPH IN THE AFTERNOON.
* MIXING HEIGHT..........6600 FT AGL.
* CWR....................0 PERCENT.
* CHANCE OF THUNDER......0 PERCENT.
CAZ214-220000-
BURNEY BASIN AND NORTHEAST PLATEAU IN SHASTA COUNTY INCLUDING
NORTHWEST LASSEN NF NORTH OF LASSEN NP-
1230 AM PDT THU AUG 21 2025
TODAY
* SKY/WEATHER............SUNNY.
* MAX TEMPERATURE........95-100 LOWER ELEVATIONS...EXCEPT 89-94
HIGHER ELEVATIONS.
* 24 HR TREND..........7 DEGREES WARMER.
* MIN HUMIDITY...........10-15 PERCENT.
* 24 HR TREND..........LITTLE CHANGE.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...UPSLOPE WINDS UP TO 5 MPH BECOMING NORTHWEST
UP TO 8 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....NORTHEAST WINDS UP TO 7 MPH SHIFTING TO THE
WEST UP TO 8 MPH IN THE AFTERNOON.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........10700 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
TONIGHT
* SKY/WEATHER............MOSTLY CLEAR.
* MIN TEMPERATURE........54-59.
* 24 HR TREND..........4 DEGREES WARMER.
* MAX HUMIDITY...........35-48 PERCENT.
* 24 HR TREND..........17 PERCENT DOWN.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...SOUTHWEST WINDS UP TO 7 MPH IN THE EVENING
BECOMING DRAINAGE UP TO 5 MPH.
* RIDGES/UPR SLOPES....SOUTHWEST WINDS UP TO 7 MPH IN THE EVENING
BECOMING VARIABLE UP TO 5 MPH.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........700 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
FRIDAY
* SKY/WEATHER............MOSTLY SUNNY.
* MAX TEMPERATURE........95-100 LOWER ELEVATIONS...EXCEPT 89-95
HIGHER ELEVATIONS.
* MIN HUMIDITY...........12-17 PERCENT.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...UPSLOPE WINDS UP TO 5 MPH BECOMING NORTHWEST
UP TO 7 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....VARIABLE WINDS UP TO 7 MPH BECOMING WEST UP
TO 8 MPH WITH LOCAL GUSTS UP TO 20 MPH IN THE AFTERNOON.
* MIXING HEIGHT..........8300 FT AGL.
* CWR....................0 PERCENT.
* CHANCE OF THUNDER......0 PERCENT.
CAZ215-220000-
NORTHERN SACRAMENTO VALLEY TO SOUTHERN TEHAMA COUNTY LINE BELOW
1000 FT-
1230 AM PDT THU AUG 21 2025
TODAY
* SKY/WEATHER............SUNNY.
* MAX TEMPERATURE........103-108.
* 24 HR TREND..........4 DEGREES WARMER.
* MIN HUMIDITY...........10-15 PERCENT.
* 24 HR TREND..........5 PERCENT DOWN.
* 20-FOOT WINDS..........NORTH WINDS 4 TO 10 MPH SHIFTING TO THE
SOUTHWEST UP TO 7 MPH IN THE AFTERNOON.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........9100 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
TONIGHT
* SKY/WEATHER............MOSTLY CLEAR.
* MIN TEMPERATURE........68-73.
* 24 HR TREND..........LITTLE CHANGE.
* MAX HUMIDITY...........36-44 PERCENT.
* 24 HR TREND..........4 PERCENT DOWN.
* 20-FOOT WINDS..........SOUTH WINDS UP TO 7 MPH SHIFTING TO THE
NORTH AFTER MIDNIGHT.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........600 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
FRIDAY
* SKY/WEATHER............MOSTLY SUNNY.
* MAX TEMPERATURE........102-107.
* MIN HUMIDITY...........10-23 PERCENT.
* 20-FOOT WINDS..........NORTH WINDS UP TO 8 MPH SHIFTING TO THE
SOUTH IN THE AFTERNOON.
* MIXING HEIGHT..........6200 FT AGL.
* CWR....................0 PERCENT.
* CHANCE OF THUNDER......0 PERCENT.
CAZ216-220000-
CENTRAL SACRAMENTO VALLEY IN GLENN, COLUSA, YUBA, NORTHERN
SUTTER, AND BUTTE COUNTY BELOW 1000 FT-
1230 AM PDT THU AUG 21 2025
TODAY
* SKY/WEATHER............MOSTLY SUNNY.
* MAX TEMPERATURE........100-105.
* 24 HR TREND..........LITTLE CHANGE.
* MIN HUMIDITY...........17-23 PERCENT.
* 24 HR TREND..........LITTLE CHANGE.
* 20-FOOT WINDS..........NORTH WINDS 4 TO 9 MPH SHIFTING TO THE
SOUTHWEST UP TO 8 MPH IN THE AFTERNOON.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........4800 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
TONIGHT
* SKY/WEATHER............MOSTLY CLEAR.
* MIN TEMPERATURE........65-71.
* 24 HR TREND..........LITTLE CHANGE.
* MAX HUMIDITY...........44-59 PERCENT.
* 24 HR TREND..........LITTLE CHANGE.
* 20-FOOT WINDS..........SOUTH WINDS UP TO 8 MPH SHIFTING TO THE
NORTHEAST UP TO 7 MPH AFTER MIDNIGHT.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........500 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
FRIDAY
* SKY/WEATHER............MOSTLY SUNNY.
* MAX TEMPERATURE........98-103.
* MIN HUMIDITY...........13-28 PERCENT.
* 20-FOOT WINDS..........NORTH WINDS UP TO 7 MPH SHIFTING TO THE
SOUTH UP TO 8 MPH IN THE AFTERNOON.
* MIXING HEIGHT..........4500 FT AGL.
* CWR....................0 PERCENT.
* CHANCE OF THUNDER......0 PERCENT.
CAZ217-220000-
SOUTHERN SACRAMENTO VALLEY IN YOLO-
SACRAMENTO FAR WESTERN PLACER, SOUTHERN SUTTER AND SOLANO COUNTY
BELOW 1000 FT-
1230 AM PDT THU AUG 21 2025
TODAY
* SKY/WEATHER............MOSTLY SUNNY.
* MAX TEMPERATURE........101-106.
* 24 HR TREND..........LITTLE CHANGE.
* MIN HUMIDITY...........16-21 PERCENT.
* 24 HR TREND..........LITTLE CHANGE.
* 20-FOOT WINDS..........WEST WINDS 4 TO 9 MPH.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........5100 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
TONIGHT
* SKY/WEATHER............PARTLY CLOUDY.
* MIN TEMPERATURE........62-69.
* 24 HR TREND..........LITTLE CHANGE.
* MAX HUMIDITY...........51-66 PERCENT.
* 24 HR TREND..........LITTLE CHANGE.
* 20-FOOT WINDS..........SOUTH WINDS UP TO 8 MPH.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........500 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
FRIDAY
* SKY/WEATHER............MOSTLY SUNNY.
* MAX TEMPERATURE........99-104.
* MIN HUMIDITY...........13-28 PERCENT.
* 20-FOOT WINDS..........SOUTH WINDS UP TO 7 MPH.
* MIXING HEIGHT..........4000 FT AGL.
* CWR....................0 PERCENT.
* CHANCE OF THUNDER......0 PERCENT.
CAZ218-220000-
CARQUINEZ STRAIT AND DELTA-
1230 AM PDT THU AUG 21 2025
TODAY
* SKY/WEATHER............MOSTLY SUNNY.
* MAX TEMPERATURE........96-101.
* 24 HR TREND..........LITTLE CHANGE.
* MIN HUMIDITY...........21-29 PERCENT.
* 24 HR TREND..........LITTLE CHANGE.
* 20-FOOT WINDS..........WEST WINDS 6 TO 12 MPH.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........3600 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
TONIGHT
* SKY/WEATHER............PARTLY CLOUDY.
* MIN TEMPERATURE........59-64.
* 24 HR TREND..........LITTLE CHANGE.
* MAX HUMIDITY...........63-78 PERCENT.
* 24 HR TREND..........LITTLE CHANGE.
* 20-FOOT WINDS..........SOUTHWEST WINDS 6 TO 12 MPH WITH LOCAL
GUSTS UP TO 20 MPH.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........500 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
FRIDAY
* SKY/WEATHER............MOSTLY SUNNY.
* MAX TEMPERATURE........90-100.
* MIN HUMIDITY...........35-50 PERCENT.
* 20-FOOT WINDS..........WEST WINDS 5 TO 11 MPH. LOCAL GUSTS UP TO
20 MPH IN THE MORNING.
* MIXING HEIGHT..........2300 FT AGL.
* CWR....................0 PERCENT.
* CHANCE OF THUNDER......0 PERCENT.
CAZ219-220000-
NORTHERN SAN JOAQUIN VALLEY IN SAN JOAQUIN AND STANISLAUS
COUNTIES BELOW 1000 FT-
1230 AM PDT THU AUG 21 2025
TODAY
* SKY/WEATHER............MOSTLY SUNNY IN THE MORNING THEN BECOMING
PARTLY CLOUDY.
* MAX TEMPERATURE........99-104.
* 24 HR TREND..........4 DEGREES WARMER.
* MIN HUMIDITY...........17-22 PERCENT.
* 24 HR TREND..........LITTLE CHANGE.
* 20-FOOT WINDS..........NORTHWEST WINDS 6 TO 12 MPH.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........4800 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
TONIGHT
* SKY/WEATHER............MOSTLY CLEAR.
* MIN TEMPERATURE........65-72.
* 24 HR TREND..........LITTLE CHANGE.
* MAX HUMIDITY...........40-55 PERCENT.
* 24 HR TREND..........7 PERCENT DOWN.
* 20-FOOT WINDS..........NORTHWEST WINDS 6 TO 12 MPH.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........500 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
FRIDAY
* SKY/WEATHER............SUNNY.
* MAX TEMPERATURE........99-104.
* MIN HUMIDITY...........12-24 PERCENT.
* 20-FOOT WINDS..........NORTHWEST WINDS 4 TO 9 MPH.
* MIXING HEIGHT..........3900 FT AGL.
* CWR....................0 PERCENT.
* CHANCE OF THUNDER......0 PERCENT.
CAZ263-279-220000-
SOUTHEAST EDGE SHASTA-TRINITY NF AND WESTERN PORTIONS OF TEHAMA-
GLENN UNIT-EASTERN MENDOCINO NF-
1230 AM PDT THU AUG 21 2025
TODAY
* SKY/WEATHER............SUNNY.
* MAX TEMPERATURE........101-106 LOWER ELEVATIONS...EXCEPT 85-95
HIGHER ELEVATIONS.
* 24 HR TREND..........5 DEGREES WARMER.
* MIN HUMIDITY...........13-19 PERCENT.
* 24 HR TREND..........5 PERCENT DOWN.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...NORTHWEST WINDS 5 TO 11 MPH SHIFTING TO THE
EAST UP TO 8 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....NORTH WINDS 6 TO 12 MPH SHIFTING TO THE
SOUTHEAST 4 TO 9 MPH IN THE AFTERNOON.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........8400 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
TONIGHT
* SKY/WEATHER............MOSTLY CLEAR.
* MIN TEMPERATURE........73-78 LOWER ELEVATIONS...EXCEPT 65-72
HIGHER ELEVATIONS.
* 24 HR TREND..........LITTLE CHANGE.
* MAX HUMIDITY...........30-35 PERCENT.
* 24 HR TREND..........LITTLE CHANGE.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...WEST WINDS 4 TO 10 MPH.
* RIDGES/UPR SLOPES....WEST WINDS 4 TO 10 MPH.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........600 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
FRIDAY
* SKY/WEATHER............MOSTLY SUNNY.
* MAX TEMPERATURE........100-105 LOWER ELEVATIONS...EXCEPT 84-94
HIGHER ELEVATIONS.
* MIN HUMIDITY...........11-24 PERCENT.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...NORTHWEST WINDS UP TO 8 MPH SHIFTING TO THE
EAST IN THE AFTERNOON.
* RIDGES/UPR SLOPES....NORTHWEST WINDS UP TO 8 MPH SHIFTING TO THE
SOUTHEAST 4 TO 9 MPH IN THE AFTERNOON.
* MIXING HEIGHT..........5900 FT AGL.
* CWR....................0 PERCENT.
* CHANCE OF THUNDER......0 PERCENT.
CAZ266-220000-
NORTHERN SIERRA FOOTHILLS FROM 1000 TO 3000 FT. INCLUDES PORTIONS
OF SHASTA-TRINITY AND BUTTE UNITS-
1230 AM PDT THU AUG 21 2025
TODAY
* SKY/WEATHER............MOSTLY SUNNY.
* MAX TEMPERATURE........98-103 LOWER ELEVATIONS...EXCEPT 93-99
HIGHER ELEVATIONS.
* 24 HR TREND..........4 DEGREES WARMER.
* MIN HUMIDITY...........13-18 PERCENT.
* 24 HR TREND..........LITTLE CHANGE.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...NORTH WINDS 7 TO 13 MPH SHIFTING TO THE
SOUTHWEST UP TO 7 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....NORTHEAST WINDS 5 TO 11 MPH IN THE MORNING
BECOMING VARIABLE UP TO 5 MPH.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........7200 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
TONIGHT
* SKY/WEATHER............MOSTLY CLEAR.
* MIN TEMPERATURE........69-76.
* 24 HR TREND..........LITTLE CHANGE.
* MAX HUMIDITY...........26-33 PERCENT.
* 24 HR TREND..........4 PERCENT DOWN.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...EAST WINDS 4 TO 10 MPH.
* RIDGES/UPR SLOPES....EAST WINDS 4 TO 10 MPH.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........500 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
FRIDAY
* SKY/WEATHER............MOSTLY SUNNY.
* MAX TEMPERATURE........97-102 LOWER ELEVATIONS...EXCEPT 92-98
HIGHER ELEVATIONS.
* MIN HUMIDITY...........11-24 PERCENT.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...EAST WINDS 5 TO 11 MPH SHIFTING TO THE
SOUTHWEST UP TO 7 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....EAST WINDS 4 TO 10 MPH SHIFTING TO THE
SOUTHWEST UP TO 7 MPH IN THE AFTERNOON.
* MIXING HEIGHT..........5500 FT AGL.
* CWR....................0 PERCENT.
* CHANCE OF THUNDER......0 PERCENT.
CAZ220-267-220000-
SOUTHERN MOTHERLODE FROM 1000 TO 3000 FT. INCLUDES PORTIONS OF
TOULUMNE-CALAVERAS UNIT-
NORTHERN MOTHERLODE FROM 1000 TO 3000 FT. INCLUDES PORTIONS OF
NEVADA-YUBA-PLACER-AMADOR AND ELDORADO UNITS-
1230 AM PDT THU AUG 21 2025
TODAY
* SKY/WEATHER............MOSTLY SUNNY.
* MAX TEMPERATURE........94-99.
* 24 HR TREND..........4 DEGREES WARMER.
* MIN HUMIDITY...........14-19 PERCENT.
* 24 HR TREND..........LITTLE CHANGE.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...NORTHEAST WINDS UP TO 7 MPH SHIFTING TO THE
WEST UP TO 8 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....EAST WINDS UP TO 8 MPH SHIFTING TO THE WEST
IN THE AFTERNOON.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........5100 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
TONIGHT
* SKY/WEATHER............PARTLY CLOUDY.
* MIN TEMPERATURE........69-74.
* 24 HR TREND..........4 DEGREES WARMER.
* MAX HUMIDITY...........33-38 PERCENT.
* 24 HR TREND..........LITTLE CHANGE.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...NORTHWEST WINDS UP TO 7 MPH SHIFTING TO THE
EAST UP TO 8 MPH AFTER MIDNIGHT.
* RIDGES/UPR SLOPES....NORTHEAST WINDS UP TO 7 MPH.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........500 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
FRIDAY
* SKY/WEATHER............SUNNY.
* MAX TEMPERATURE........97-102.
* MIN HUMIDITY...........12-21 PERCENT.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...EAST WINDS UP TO 7 MPH SHIFTING TO THE WEST
IN THE AFTERNOON.
* RIDGES/UPR SLOPES....EAST WINDS UP TO 7 MPH SHIFTING TO THE
SOUTHWEST UP TO 8 MPH IN THE AFTERNOON.
* MIXING HEIGHT..........5700 FT AGL.
* CWR....................0 PERCENT.
* CHANCE OF THUNDER......1 PERCENT.
CAZ268-220000-
NORTHERN SIERRA INCLUDING LASSEN NP AND PLUMAS AND LASSEN NF/S
WEST OF THE SIERRA CREST (WEST OF EVANS PEAK-GRIZZLY PEAK-
BECKWORTH PEAK)-
1230 AM PDT THU AUG 21 2025
TODAY
* SKY/WEATHER............MOSTLY SUNNY.
* MAX TEMPERATURE........88-95 LOWER ELEVATIONS...EXCEPT 81-88
HIGHER ELEVATIONS.
* 24 HR TREND..........5 DEGREES WARMER.
* MIN HUMIDITY...........13-19 PERCENT.
* 24 HR TREND..........LITTLE CHANGE.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...EAST WINDS 6 TO 12 MPH SHIFTING TO THE
SOUTHWEST UP TO 8 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....EAST WINDS 6 TO 12 MPH SHIFTING TO THE
SOUTHWEST 4 TO 9 MPH IN THE AFTERNOON.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........8500 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
TONIGHT
* SKY/WEATHER............MOSTLY CLEAR.
* MIN TEMPERATURE........56-66.
* 24 HR TREND..........LITTLE CHANGE.
* MAX HUMIDITY...........26-38 PERCENT...EXCEPT 39-53 PERCENT IN
THE HIGH MOUNTAIN VALLEYS.
* 24 HR TREND..........7 PERCENT DOWN.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...SOUTHWEST WINDS UP TO 8 MPH SHIFTING TO THE
EAST 4 TO 9 MPH AFTER MIDNIGHT.
* RIDGES/UPR SLOPES....SOUTHWEST WINDS UP TO 7 MPH SHIFTING TO THE
EAST UP TO 8 MPH AFTER MIDNIGHT.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........300 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
FRIDAY
* SKY/WEATHER............MOSTLY SUNNY.
* MAX TEMPERATURE........88-94 LOWER ELEVATIONS...EXCEPT 81-89
HIGHER ELEVATIONS.
* MIN HUMIDITY...........12-24 PERCENT.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...NORTHEAST WINDS 4 TO 10 MPH SHIFTING TO THE
SOUTHWEST UP TO 8 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....EAST WINDS 4 TO 10 MPH SHIFTING TO THE
SOUTHWEST 4 TO 9 MPH IN THE AFTERNOON.
* MIXING HEIGHT..........6800 FT AGL.
* CWR....................0 PERCENT.
* CHANCE OF THUNDER......0 PERCENT.
CAZ221-269-220000-
STANISLAUS NF WEST OF THE SIERRA CREST-
NORTHERN SIERRA INCLUDING THE TAHOE AND ELDORADO NF/S WEST OF THE
SIERRA CREST-
1230 AM PDT THU AUG 21 2025
TODAY
* SKY/WEATHER............MOSTLY SUNNY IN THE MORNING THEN BECOMING
PARTLY CLOUDY.
* MAX TEMPERATURE........90-96 LOWER ELEVATIONS...EXCEPT 78-88
HIGHER ELEVATIONS.
* 24 HR TREND..........4 DEGREES WARMER.
* MIN HUMIDITY...........14-19 PERCENT.
* 24 HR TREND..........LITTLE CHANGE.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...SOUTHEAST WINDS UP TO 8 MPH SHIFTING TO THE
WEST IN THE AFTERNOON.
* RIDGES/UPR SLOPES....SOUTHEAST WINDS 5 TO 11 MPH SHIFTING TO THE
SOUTHWEST 4 TO 9 MPH IN THE AFTERNOON.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........6000 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
TONIGHT
* SKY/WEATHER............PARTLY CLOUDY.
* MIN TEMPERATURE........64-72 LOWER ELEVATIONS...EXCEPT 55-65
HIGHER ELEVATIONS.
* 24 HR TREND..........4 DEGREES WARMER.
* MAX HUMIDITY...........31-44 PERCENT.
* 24 HR TREND..........LITTLE CHANGE.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...EAST WINDS UP TO 8 MPH.
* RIDGES/UPR SLOPES....EAST WINDS UP TO 8 MPH.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........300 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
FRIDAY
* SKY/WEATHER............MOSTLY SUNNY.
* MAX TEMPERATURE........92-98 LOWER ELEVATIONS...EXCEPT 78-88
HIGHER ELEVATIONS.
* MIN HUMIDITY...........15-30 PERCENT.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...EAST WINDS UP TO 8 MPH SHIFTING TO THE
SOUTHWEST 4 TO 9 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....EAST WINDS UP TO 8 MPH SHIFTING TO THE
SOUTHWEST 4 TO 10 MPH WITH LOCAL GUSTS UP TO 20 MPH IN THE
AFTERNOON.
* MIXING HEIGHT..........7300 FT AGL.
* CWR....................0 PERCENT.
* CHANCE OF THUNDER......4 PERCENT.
EXTENDED
...SHASTA COUNTY MOUNTAINS AND COASTAL RANGE
FRIDAY NIGHT
MOSTLY CLEAR. LOWS 62 TO 72. WEST WINDS UP TO
10 MPH.
SATURDAY
MOSTLY SUNNY. HIGHS 87 TO 97. SOUTHEAST WINDS UP TO
10 MPH.
SATURDAY NIGHT
MOSTLY CLEAR. LOWS 62 TO 72. WEST WINDS UP TO
10 MPH.
SUNDAY
MOSTLY SUNNY. HIGHS 86 TO 96. SOUTHEAST WINDS UP TO
10 MPH.
SUNDAY NIGHT
MOSTLY CLEAR. LOWS 60 TO 70. VARIABLE LESS THAN
5 MPH.
MONDAY
MOSTLY SUNNY. HIGHS 86 TO 96. EAST WINDS UP TO 10 MPH.
MONDAY NIGHT
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS.
LOWS 59 TO 69. VARIABLE LESS THAN 5 MPH.
...NORTHERN SIERRA AND LASSEN PARK
FRIDAY NIGHT
MOSTLY CLEAR. LOWS 62 TO 72. EAST WINDS UP TO
10 MPH.
SATURDAY
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS. HIGHS
88 TO 97. SOUTHWEST WINDS 5 TO 15 MPH.
SATURDAY NIGHT
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS.
LOWS 61 TO 71. EAST WINDS UP TO 10 MPH.
SUNDAY
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS. HIGHS
86 TO 96. VARIABLE LESS THAN 5 MPH.
SUNDAY NIGHT
MOSTLY CLEAR. LOWS 60 TO 70. VARIABLE LESS THAN
5 MPH.
MONDAY
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS. HIGHS
85 TO 94. VARIABLE LESS THAN 5 MPH.
MONDAY NIGHT
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS.
LOWS 59 TO 69. VARIABLE LESS THAN 5 MPH.
...SIERRA NEVADA FOOTHILLS
FRIDAY NIGHT
MOSTLY CLEAR. LOWS 71 TO 76. EAST WINDS UP TO
10 MPH.
SATURDAY
MOSTLY SUNNY. HIGHS 95 TO 100. SOUTHWEST WINDS UP TO
10 MPH.
SATURDAY NIGHT
MOSTLY CLEAR. LOWS 69 TO 74. EAST WINDS UP TO
10 MPH.
SUNDAY
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS. HIGHS
93 TO 98. VARIABLE LESS THAN 5 MPH.
SUNDAY NIGHT
MOSTLY CLEAR. LOWS 68 TO 73. VARIABLE LESS THAN
5 MPH.
MONDAY
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS. HIGHS
92 TO 97. VARIABLE LESS THAN 5 MPH.
MONDAY NIGHT
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS.
LOWS 66 TO 72. VARIABLE LESS THAN 5 MPH.
...CENTRAL VALLEY AND DELTA
FRIDAY NIGHT
MOSTLY CLEAR. LOWS 63 TO 71. SOUTHWEST WINDS 5 TO
15 MPH.
SATURDAY
MOSTLY SUNNY. HIGHS 97 TO 102. SOUTHWEST WINDS 5 TO
15 MPH.
SATURDAY NIGHT
MOSTLY CLEAR. LOWS 62 TO 70. SOUTHWEST WINDS
5 TO 15 MPH.
SUNDAY
MOSTLY SUNNY. HIGHS 96 TO 101. SOUTHWEST WINDS UP TO
10 MPH.
SUNDAY NIGHT
MOSTLY CLEAR. LOWS 60 TO 68. SOUTHWEST WINDS UP
TO 10 MPH.
MONDAY
SUNNY. HIGHS 94 TO 100. SOUTHWEST WINDS UP TO 10 MPH.
MONDAY NIGHT
MOSTLY CLEAR. LOWS 60 TO 67. SOUTHWEST WINDS UP
TO 10 MPH.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
The Nexlab CA Page Main Text Page