610
FNUS56 KSTO 151944
FWFSTO
FIRE WEATHER PLANNING FORECAST FOR INTERIOR NORTHERN CALIFORNIA
NATIONAL WEATHER SERVICE SACRAMENTO CA
1244 PM PDT FRI AUG 15 2025
...SLIGHT CHANCE OF THUNDERSTORMS ON SATURDAY AND SUNDAY,
INCLUDING SATURDAY NIGHT, IN THE VICINITY OF SHASTA COUNTY...
DISCUSSION
NEAR TO BELOW NORMAL TEMPERATURES CONTINUE ACROSS THE REGION
THROUGH THE WEEKEND WITH PERIODICALLY BREEZY ONSHORE FLOW AND
HIGHER RELATIVE HUMIDITY. THERE IS A 15-35% CHANCE OF SHOWERS OR
THUNDERSTORMS OVER THE COAST RANGE, SOUTHERN CASCADES, SHASTA
COUNTY MOUNTAINS AND THE NORTHERN SACRAMENTO VALLEY ON SATURDAY
AND SUNDAY, INCLUDING OVERNIGHT ON SATURDAY. THUNDERSTORMS WILL
MOSTLY BE WET BUT FIRE STARTS ARE POSSIBLE OUTSIDE OF THE MAIN
PRECIPITATION CORES. A GRADUAL WARMING AND DRYING TREND IS
FAVORED FOR NEXT WEEK.
CAZ213-161945-
EASTERN PORTION OF SHASTA-TRINITY NF-
1244 PM PDT FRI AUG 15 2025
TONIGHT
* SKY/WEATHER............MOSTLY CLEAR.
* MIN TEMPERATURE........64-69 LOWER ELEVATIONS...EXCEPT 54-64
HIGHER ELEVATIONS.
* 24 HR TREND..........LITTLE CHANGE.
* MAX HUMIDITY...........67-82 PERCENT.
* 24 HR TREND..........21 PERCENT UP.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...NORTHWEST WINDS 5 TO 11 MPH.
* RIDGES/UPR SLOPES....NORTHWEST WINDS 5 TO 11 MPH.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........700 FT AGL.
* CHANCE OF THUNDER......3 PERCENT.
SATURDAY
* SKY/WEATHER............MOSTLY SUNNY IN THE MORNING, THEN PARTLY
CLOUDY WITH A CHANCE OF SHOWERS AND A SLIGHT CHANCE OF
THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE........87-92 LOWER ELEVATIONS...EXCEPT 76-85
HIGHER ELEVATIONS.
* 24 HR TREND..........7 DEGREES COOLER.
* MIN HUMIDITY...........37-51 PERCENT.
* 24 HR TREND..........21 PERCENT UP.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...UPSLOPE WINDS UP TO 5 MPH BECOMING SOUTHWEST
UP TO 8 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....NORTH WINDS UP TO 8 MPH SHIFTING TO THE
SOUTHWEST 4 TO 10 MPH WITH LOCAL GUSTS UP TO 20 MPH IN THE
AFTERNOON.
* CWR....................10 PERCENT.
* MIXING HEIGHT..........6000 FT AGL.
* CHANCE OF THUNDER......16 PERCENT.
SATURDAY NIGHT
* SKY/WEATHER............MOSTLY CLOUDY WITH A CHANCE OF SHOWERS AND
A SLIGHT CHANCE OF THUNDERSTORMS.
* MIN TEMPERATURE........62-68 LOWER ELEVATIONS...EXCEPT 55-63
HIGHER ELEVATIONS.
* MAX HUMIDITY...........74-89 PERCENT.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...WEST WINDS UP TO 8 MPH IN THE EVENING
BECOMING DRAINAGE UP TO 5 MPH.
* RIDGES/UPR SLOPES....NORTHWEST WINDS UP TO 8 MPH.
* MIXING HEIGHT..........700 FT AGL.
* CWR....................20 PERCENT.
* CHANCE OF THUNDER......24 PERCENT.
SUNDAY
* SKY/WEATHER............MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY
EARLY IN THE AFTERNOON THEN BECOMING MOSTLY SUNNY. A SLIGHT
CHANCE OF SHOWERS IN THE MORNING. AT HIGHER ELEVATIONS, A SLIGHT
CHANCE OF SHOWERS AND THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE........82-87 LOWER ELEVATIONS...EXCEPT 71-81
HIGHER ELEVATIONS.
* MIN HUMIDITY...........41-56 PERCENT.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...UPSLOPE WINDS UP TO 5 MPH BECOMING SOUTH UP
TO 8 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....VARIABLE WINDS UP TO 7 MPH BECOMING SOUTH 4
TO 9 MPH IN THE AFTERNOON.
* MIXING HEIGHT..........5500 FT AGL.
* CWR....................10 PERCENT.
* CHANCE OF THUNDER......13 PERCENT.
CAZ214-161945-
BURNEY BASIN AND NORTHEAST PLATEAU IN SHASTA COUNTY INCLUDING
NORTHWEST LASSEN NF NORTH OF LASSEN NP-
1244 PM PDT FRI AUG 15 2025
TONIGHT
* SKY/WEATHER............MOSTLY CLEAR.
* MIN TEMPERATURE........53-58 LOWER ELEVATIONS...EXCEPT 48-57
HIGHER ELEVATIONS.
* 24 HR TREND..........LITTLE CHANGE.
* MAX HUMIDITY...........72-85 PERCENT.
* 24 HR TREND..........18 PERCENT UP.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...WEST WINDS 4 TO 9 MPH WITH LOCAL GUSTS UP TO
20 MPH IN THE EVENING BECOMING DRAINAGE UP TO 5 MPH.
* RIDGES/UPR SLOPES....WEST WINDS 4 TO 9 MPH WITH LOCAL GUSTS UP TO
20 MPH IN THE EVENING BECOMING VARIABLE UP TO 5 MPH.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........800 FT AGL.
* CHANCE OF THUNDER......2 PERCENT.
SATURDAY
* SKY/WEATHER............MOSTLY SUNNY IN THE MORNING, THEN PARTLY
CLOUDY WITH A SLIGHT CHANCE OF SHOWERS IN THE AFTERNOON.
* MAX TEMPERATURE........82-87 LOWER ELEVATIONS...EXCEPT 76-81
HIGHER ELEVATIONS.
* 24 HR TREND..........5 DEGREES COOLER.
* MIN HUMIDITY...........36-41 PERCENT.
* 24 HR TREND..........18 PERCENT UP.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...UPSLOPE WINDS UP TO 5 MPH BECOMING WEST 5 TO
11 MPH WITH LOCAL GUSTS UP TO 25 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....VARIABLE WINDS UP TO 7 MPH BECOMING WEST 5
TO 11 MPH WITH LOCAL GUSTS UP TO 25 MPH IN THE AFTERNOON.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........7200 FT AGL.
* CHANCE OF THUNDER......11 PERCENT.
SATURDAY NIGHT
* SKY/WEATHER............MOSTLY CLOUDY WITH A SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS.
* MIN TEMPERATURE........56-61 LOWER ELEVATIONS...EXCEPT 51-59
HIGHER ELEVATIONS.
* MAX HUMIDITY...........81-96 PERCENT.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...WEST WINDS 6 TO 12 MPH WITH LOCAL GUSTS UP
TO 25 MPH IN THE EVENING BECOMING DRAINAGE UP TO 5 MPH.
* RIDGES/UPR SLOPES....WEST WINDS 5 TO 11 MPH WITH LOCAL GUSTS UP
TO 25 MPH IN THE EVENING BECOMING VARIABLE UP TO 5 MPH.
* MIXING HEIGHT..........1100 FT AGL.
* CWR....................10 PERCENT.
* CHANCE OF THUNDER......22 PERCENT.
SUNDAY
* SKY/WEATHER............MOSTLY CLOUDY WITH A SLIGHT CHANCE OF
SHOWERS IN THE MORNING, THEN PARTLY CLOUDY WITH A SLIGHT CHANCE
OF SHOWERS AND THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE........77-82 LOWER ELEVATIONS...EXCEPT 70-76
HIGHER ELEVATIONS.
* MIN HUMIDITY...........44-59 PERCENT.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...UPSLOPE WINDS UP TO 5 MPH BECOMING WEST 4 TO
9 MPH WITH LOCAL GUSTS UP TO 20 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....VARIABLE WINDS UP TO 7 MPH BECOMING WEST 4
TO 9 MPH WITH LOCAL GUSTS UP TO 20 MPH IN THE AFTERNOON.
* MIXING HEIGHT..........5600 FT AGL.
* CWR....................10 PERCENT.
* CHANCE OF THUNDER......22 PERCENT.
CAZ215-161945-
NORTHERN SACRAMENTO VALLEY TO SOUTHERN TEHAMA COUNTY LINE BELOW
1000 FT-
1244 PM PDT FRI AUG 15 2025
TONIGHT
* SKY/WEATHER............MOSTLY CLEAR.
* MIN TEMPERATURE........66-71.
* 24 HR TREND..........LITTLE CHANGE.
* MAX HUMIDITY...........65-76 PERCENT.
* 24 HR TREND..........20 PERCENT UP.
* 20-FOOT WINDS..........NORTHWEST WINDS 5 TO 11 MPH. LOCAL GUSTS
UP TO 25 MPH IN THE EVENING.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........700 FT AGL.
* CHANCE OF THUNDER......1 PERCENT.
SATURDAY
* SKY/WEATHER............MOSTLY SUNNY IN THE MORNING, THEN PARTLY
CLOUDY WITH A SLIGHT CHANCE OF SHOWERS IN THE AFTERNOON.
* MAX TEMPERATURE........88-93.
* 24 HR TREND..........8 DEGREES COOLER.
* MIN HUMIDITY...........37-44 PERCENT.
* 24 HR TREND..........19 PERCENT UP.
* 20-FOOT WINDS..........SOUTH WINDS 4 TO 9 MPH. LOCAL GUSTS UP TO
20 MPH IN THE AFTERNOON.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........6400 FT AGL.
* CHANCE OF THUNDER......9 PERCENT.
SATURDAY NIGHT
* SKY/WEATHER............MOSTLY CLOUDY WITH A SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS.
* MIN TEMPERATURE........65-70.
* MAX HUMIDITY...........76-91 PERCENT.
* 20-FOOT WINDS..........SOUTHWEST WINDS 4 TO 9 MPH. LOCAL GUSTS UP
TO 20 MPH IN THE EVENING.
* MIXING HEIGHT..........900 FT AGL.
* CWR....................10 PERCENT.
* CHANCE OF THUNDER......15 PERCENT.
SUNDAY
* SKY/WEATHER............PARTLY CLOUDY WITH A SLIGHT CHANCE OF
SHOWERS IN THE MORNING, THEN MOSTLY SUNNY IN THE AFTERNOON.
* MAX TEMPERATURE........85-90.
* MIN HUMIDITY...........40-55 PERCENT.
* 20-FOOT WINDS..........SOUTH WINDS 4 TO 9 MPH. LOCAL GUSTS UP TO
20 MPH IN THE AFTERNOON.
* MIXING HEIGHT..........5500 FT AGL.
* CWR....................0 PERCENT.
* CHANCE OF THUNDER......7 PERCENT.
CAZ216-161945-
CENTRAL SACRAMENTO VALLEY IN GLENN, COLUSA, YUBA, NORTHERN
SUTTER, AND BUTTE COUNTY BELOW 1000 FT-
1244 PM PDT FRI AUG 15 2025
TONIGHT
* SKY/WEATHER............CLEAR.
* MIN TEMPERATURE........62-67.
* 24 HR TREND..........LITTLE CHANGE.
* MAX HUMIDITY...........76-91 PERCENT.
* 24 HR TREND..........14 PERCENT UP.
* 20-FOOT WINDS..........SOUTHEAST WINDS 6 TO 12 MPH.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........500 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
SATURDAY
* SKY/WEATHER............MOSTLY SUNNY.
* MAX TEMPERATURE........87-92.
* 24 HR TREND..........8 DEGREES COOLER.
* MIN HUMIDITY...........44-58 PERCENT.
* 24 HR TREND..........22 PERCENT UP.
* 20-FOOT WINDS..........SOUTHEAST WINDS 5 TO 11 MPH. LOCAL GUSTS
UP TO 20 MPH IN THE AFTERNOON.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........5200 FT AGL.
* CHANCE OF THUNDER......3 PERCENT.
SATURDAY NIGHT
* SKY/WEATHER............MOSTLY CLEAR.
* MIN TEMPERATURE........62-67.
* MAX HUMIDITY...........74-89 PERCENT.
* 20-FOOT WINDS..........SOUTH WINDS 6 TO 12 MPH.
* MIXING HEIGHT..........600 FT AGL.
* CWR....................0 PERCENT.
* CHANCE OF THUNDER......6 PERCENT.
SUNDAY
* SKY/WEATHER............MOSTLY SUNNY.
* MAX TEMPERATURE........83-88.
* MIN HUMIDITY...........44-59 PERCENT.
* 20-FOOT WINDS..........SOUTHEAST WINDS 5 TO 11 MPH. LOCAL GUSTS
UP TO 20 MPH IN THE AFTERNOON.
* MIXING HEIGHT..........4800 FT AGL.
* CWR....................0 PERCENT.
* CHANCE OF THUNDER......1 PERCENT.
CAZ217-161945-
SOUTHERN SACRAMENTO VALLEY IN YOLO-
SACRAMENTO FAR WESTERN PLACER, SOUTHERN SUTTER AND SOLANO COUNTY
BELOW 1000 FT-
1244 PM PDT FRI AUG 15 2025
TONIGHT
* SKY/WEATHER............CLEAR.
* MIN TEMPERATURE........61-66.
* 24 HR TREND..........LITTLE CHANGE.
* MAX HUMIDITY...........79-91 PERCENT.
* 24 HR TREND..........7 PERCENT UP.
* 20-FOOT WINDS..........SOUTH WINDS 6 TO 12 MPH WITH LOCAL GUSTS
UP TO 25 MPH.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........600 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
SATURDAY
* SKY/WEATHER............SUNNY.
* MAX TEMPERATURE........86-91.
* 24 HR TREND..........8 DEGREES COOLER.
* MIN HUMIDITY...........44-53 PERCENT.
* 24 HR TREND..........18 PERCENT UP.
* 20-FOOT WINDS..........SOUTH WINDS 6 TO 12 MPH. LOCAL GUSTS UP TO
25 MPH IN THE AFTERNOON.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........5400 FT AGL.
* CHANCE OF THUNDER......1 PERCENT.
SATURDAY NIGHT
* SKY/WEATHER............CLEAR.
* MIN TEMPERATURE........60-65.
* MAX HUMIDITY...........75-90 PERCENT.
* 20-FOOT WINDS..........SOUTH WINDS 8 TO 14 MPH WITH LOCAL GUSTS
UP TO 25 MPH.
* MIXING HEIGHT..........900 FT AGL.
* CWR....................0 PERCENT.
* CHANCE OF THUNDER......1 PERCENT.
SUNDAY
* SKY/WEATHER............MOSTLY SUNNY.
* MAX TEMPERATURE........81-86.
* MIN HUMIDITY...........36-51 PERCENT.
* 20-FOOT WINDS..........SOUTH WINDS 7 TO 13 MPH.
* MIXING HEIGHT..........4100 FT AGL.
* CWR....................0 PERCENT.
* CHANCE OF THUNDER......0 PERCENT.
CAZ218-161945-
CARQUINEZ STRAIT AND DELTA-
1244 PM PDT FRI AUG 15 2025
TONIGHT
* SKY/WEATHER............CLEAR.
* MIN TEMPERATURE........62-67.
* 24 HR TREND..........LITTLE CHANGE.
* MAX HUMIDITY...........83-89 PERCENT.
* 24 HR TREND..........LITTLE CHANGE.
* 20-FOOT WINDS..........SOUTHWEST WINDS 11 TO 17 MPH WITH LOCAL
GUSTS UP TO 30 MPH.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........700 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
SATURDAY
* SKY/WEATHER............MOSTLY SUNNY.
* MAX TEMPERATURE........82-87.
* 24 HR TREND..........8 DEGREES COOLER.
* MIN HUMIDITY...........52-61 PERCENT.
* 24 HR TREND..........18 PERCENT UP.
* 20-FOOT WINDS..........SOUTHWEST WINDS 11 TO 17 MPH WITH LOCAL
GUSTS UP TO 30 MPH.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........3200 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
SATURDAY NIGHT
* SKY/WEATHER............CLEAR.
* MIN TEMPERATURE........60-65.
* MAX HUMIDITY...........80-95 PERCENT.
* 20-FOOT WINDS..........SOUTHWEST WINDS 13 TO 19 MPH WITH LOCAL
GUSTS UP TO 30 MPH.
* MIXING HEIGHT..........1100 FT AGL.
* CWR....................0 PERCENT.
* CHANCE OF THUNDER......1 PERCENT.
SUNDAY
* SKY/WEATHER............MOSTLY SUNNY.
* MAX TEMPERATURE........75-81.
* MIN HUMIDITY...........54-69 PERCENT.
* 20-FOOT WINDS..........SOUTHWEST WINDS 11 TO 17 MPH WITH LOCAL
GUSTS UP TO 30 MPH.
* MIXING HEIGHT..........3100 FT AGL.
* CWR....................0 PERCENT.
* CHANCE OF THUNDER......0 PERCENT.
CAZ219-161945-
NORTHERN SAN JOAQUIN VALLEY IN SAN JOAQUIN AND STANISLAUS
COUNTIES BELOW 1000 FT-
1244 PM PDT FRI AUG 15 2025
TONIGHT
* SKY/WEATHER............CLEAR.
* MIN TEMPERATURE........60-65.
* 24 HR TREND..........LITTLE CHANGE.
* MAX HUMIDITY...........79-91 PERCENT.
* 24 HR TREND..........7 PERCENT UP.
* 20-FOOT WINDS..........WEST WINDS 13 TO 20 MPH.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........600 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
SATURDAY
* SKY/WEATHER............SUNNY.
* MAX TEMPERATURE........84-89.
* 24 HR TREND..........8 DEGREES COOLER.
* MIN HUMIDITY...........46-56 PERCENT.
* 24 HR TREND..........20 PERCENT UP.
* 20-FOOT WINDS..........WEST WINDS 11 TO 17 MPH.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........4400 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
SATURDAY NIGHT
* SKY/WEATHER............CLEAR.
* MIN TEMPERATURE........60-65.
* MAX HUMIDITY...........66-81 PERCENT.
* 20-FOOT WINDS..........WEST WINDS 13 TO 19 MPH. LOCAL GUSTS UP TO
30 MPH IN THE EVENING.
* MIXING HEIGHT..........800 FT AGL.
* CWR....................0 PERCENT.
* CHANCE OF THUNDER......0 PERCENT.
SUNDAY
* SKY/WEATHER............SUNNY.
* MAX TEMPERATURE........81-86.
* MIN HUMIDITY...........29-44 PERCENT.
* 20-FOOT WINDS..........WEST WINDS 8 TO 14 MPH.
* MIXING HEIGHT..........4600 FT AGL.
* CWR....................0 PERCENT.
* CHANCE OF THUNDER......0 PERCENT.
CAZ263-279-161945-
SOUTHEAST EDGE SHASTA-TRINITY NF AND WESTERN PORTIONS OF TEHAMA-
GLENN UNIT-EASTERN MENDOCINO NF-
1244 PM PDT FRI AUG 15 2025
TONIGHT
* SKY/WEATHER............MOSTLY CLEAR.
* MIN TEMPERATURE........66-71 LOWER ELEVATIONS...EXCEPT 56-63
HIGHER ELEVATIONS.
* 24 HR TREND..........LITTLE CHANGE.
* MAX HUMIDITY...........60-72 PERCENT.
* 24 HR TREND..........22 PERCENT UP.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...WEST WINDS 9 TO 15 MPH WITH LOCAL GUSTS UP
TO 30 MPH.
* RIDGES/UPR SLOPES....NORTHWEST WINDS 9 TO 15 MPH WITH LOCAL GUSTS
UP TO 30 MPH.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........700 FT AGL.
* CHANCE OF THUNDER......1 PERCENT.
SATURDAY
* SKY/WEATHER............MOSTLY SUNNY IN THE MORNING, THEN PARTLY
CLOUDY WITH A CHANCE OF SHOWERS AND A SLIGHT CHANCE OF
THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE........86-91 LOWER ELEVATIONS...EXCEPT 70-80
HIGHER ELEVATIONS.
* 24 HR TREND..........7 DEGREES COOLER.
* MIN HUMIDITY...........40-45 PERCENT LOWER ELEVATIONS...EXCEPT
48-59 PERCENT HIGH ELEVATIONS.
* 24 HR TREND..........23 PERCENT UP.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...NORTHWEST WINDS 5 TO 11 MPH SHIFTING TO THE
SOUTHWEST 4 TO 9 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....WEST WINDS 6 TO 12 MPH.
* CWR....................10 PERCENT.
* MIXING HEIGHT..........4500 FT AGL.
* CHANCE OF THUNDER......15 PERCENT.
SATURDAY NIGHT
* SKY/WEATHER............MOSTLY CLOUDY WITH A CHANCE OF SHOWERS AND
A SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING, THEN PARTLY
CLOUDY AFTER MIDNIGHT.
* MIN TEMPERATURE........65-70 LOWER ELEVATIONS...EXCEPT 56-62
HIGHER ELEVATIONS.
* MAX HUMIDITY...........75-90 PERCENT.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...NORTHWEST WINDS 5 TO 11 MPH.
* RIDGES/UPR SLOPES....NORTHWEST WINDS 5 TO 11 MPH.
* MIXING HEIGHT..........700 FT AGL.
* CWR....................10 PERCENT.
* CHANCE OF THUNDER......14 PERCENT.
SUNDAY
* SKY/WEATHER............PARTLY CLOUDY IN THE MORNING, THEN PARTLY
CLOUDY WITH A SLIGHT CHANCE OF SHOWERS IN THE AFTERNOON.
* MAX TEMPERATURE........81-86 LOWER ELEVATIONS...EXCEPT 65-75
HIGHER ELEVATIONS.
* MIN HUMIDITY...........39-54 PERCENT LOWER ELEVATIONS...EXCEPT
50-65 PERCENT HIGH ELEVATIONS.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...EAST WINDS 4 TO 9 MPH.
* RIDGES/UPR SLOPES....SOUTHEAST WINDS 4 TO 9 MPH.
* MIXING HEIGHT..........4600 FT AGL.
* CWR....................10 PERCENT.
* CHANCE OF THUNDER......7 PERCENT.
CAZ266-161945-
NORTHERN SIERRA FOOTHILLS FROM 1000 TO 3000 FT. INCLUDES PORTIONS
OF SHASTA-TRINITY AND BUTTE UNITS-
1244 PM PDT FRI AUG 15 2025
TONIGHT
* SKY/WEATHER............CLEAR.
* MIN TEMPERATURE........62-67.
* 24 HR TREND..........LITTLE CHANGE.
* MAX HUMIDITY...........60-71 PERCENT.
* 24 HR TREND..........19 PERCENT UP.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...SOUTHWEST WINDS 4 TO 9 MPH SHIFTING TO THE
EAST UP TO 7 MPH AFTER MIDNIGHT.
* RIDGES/UPR SLOPES....SOUTHWEST WINDS UP TO 8 MPH IN THE EVENING
BECOMING VARIABLE UP TO 5 MPH.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........600 FT AGL.
* CHANCE OF THUNDER......1 PERCENT.
SATURDAY
* SKY/WEATHER............MOSTLY SUNNY.
* MAX TEMPERATURE........84-89 LOWER ELEVATIONS...EXCEPT 79-85
HIGHER ELEVATIONS.
* 24 HR TREND..........8 DEGREES COOLER.
* MIN HUMIDITY...........39-49 PERCENT.
* 24 HR TREND..........21 PERCENT UP.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...SOUTHWEST WINDS 4 TO 10 MPH.
* RIDGES/UPR SLOPES....VARIABLE WINDS UP TO 7 MPH BECOMING
SOUTHWEST 4 TO 9 MPH WITH LOCAL GUSTS UP TO 20 MPH IN THE
AFTERNOON.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........5400 FT AGL.
* CHANCE OF THUNDER......4 PERCENT.
SATURDAY NIGHT
* SKY/WEATHER............PARTLY CLOUDY WITH A SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS.
* MIN TEMPERATURE........62-67.
* MAX HUMIDITY...........75-90 PERCENT.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...SOUTH WINDS 4 TO 9 MPH. LOCAL GUSTS UP TO 20
MPH IN THE EVENING.
* RIDGES/UPR SLOPES....SOUTH WINDS 4 TO 9 MPH WITH LOCAL GUSTS UP
TO 20 MPH IN THE EVENING BECOMING VARIABLE UP TO 5 MPH.
* MIXING HEIGHT..........800 FT AGL.
* CWR....................10 PERCENT.
* CHANCE OF THUNDER......10 PERCENT.
SUNDAY
* SKY/WEATHER............PARTLY CLOUDY EARLY IN THE MORNING THEN
CLEARING. A SLIGHT CHANCE OF SHOWERS IN THE MORNING.
* MAX TEMPERATURE........80-85 LOWER ELEVATIONS...EXCEPT 75-81
HIGHER ELEVATIONS.
* MIN HUMIDITY...........41-56 PERCENT.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...SOUTH WINDS 5 TO 11 MPH.
* RIDGES/UPR SLOPES....SOUTHWEST WINDS 5 TO 11 MPH.
* MIXING HEIGHT..........5200 FT AGL.
* CWR....................0 PERCENT.
* CHANCE OF THUNDER......7 PERCENT.
CAZ220-267-161945-
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-
1244 PM PDT FRI AUG 15 2025
TONIGHT
* SKY/WEATHER............CLEAR.
* MIN TEMPERATURE........59-64.
* 24 HR TREND..........LITTLE CHANGE.
* MAX HUMIDITY...........68-83 PERCENT.
* 24 HR TREND..........20 PERCENT UP.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...SOUTH WINDS UP TO 8 MPH.
* RIDGES/UPR SLOPES....SOUTHWEST WINDS UP TO 7 MPH IN THE EVENING
BECOMING VARIABLE UP TO 5 MPH.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........500 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
SATURDAY
* SKY/WEATHER............SUNNY.
* MAX TEMPERATURE........81-86.
* 24 HR TREND..........7 DEGREES COOLER.
* MIN HUMIDITY...........41-48 PERCENT.
* 24 HR TREND..........17 PERCENT UP.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...SOUTHWEST WINDS UP TO 8 MPH.
* RIDGES/UPR SLOPES....SOUTHWEST WINDS UP TO 8 MPH.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........5100 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
SATURDAY NIGHT
* SKY/WEATHER............CLEAR.
* MIN TEMPERATURE........57-62.
* MAX HUMIDITY...........77-92 PERCENT.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...SOUTH WINDS UP TO 8 MPH.
* RIDGES/UPR SLOPES....SOUTHWEST WINDS 4 TO 9 MPH IN THE EVENING
BECOMING VARIABLE UP TO 5 MPH.
* MIXING HEIGHT..........800 FT AGL.
* CWR....................0 PERCENT.
* CHANCE OF THUNDER......1 PERCENT.
SUNDAY
* SKY/WEATHER............MOSTLY SUNNY.
* MAX TEMPERATURE........79-84.
* MIN HUMIDITY...........31-46 PERCENT.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...SOUTHWEST WINDS UP TO 8 MPH.
* RIDGES/UPR SLOPES....VARIABLE WINDS UP TO 7 MPH BECOMING
SOUTHWEST UP TO 8 MPH IN THE AFTERNOON.
* MIXING HEIGHT..........4800 FT AGL.
* CWR....................0 PERCENT.
* CHANCE OF THUNDER......0 PERCENT.
CAZ268-161945-
NORTHERN SIERRA INCLUDING LASSEN NP AND PLUMAS AND LASSEN NF/S
WEST OF THE SIERRA CREST (WEST OF EVANS PEAK-GRIZZLY PEAK-
BECKWORTH PEAK)-
1244 PM PDT FRI AUG 15 2025
TONIGHT
* SKY/WEATHER............CLEAR.
* MIN TEMPERATURE........50-60.
* 24 HR TREND..........LITTLE CHANGE.
* MAX HUMIDITY...........62-77 PERCENT...EXCEPT 78-88 PERCENT IN
THE HIGH MOUNTAIN VALLEYS.
* 24 HR TREND..........16 PERCENT UP.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...SOUTHWEST WINDS 5 TO 11 MPH SHIFTING TO THE
EAST UP TO 7 MPH AFTER MIDNIGHT.
* RIDGES/UPR SLOPES....SOUTHWEST WINDS 4 TO 10 MPH.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........500 FT AGL.
* CHANCE OF THUNDER......1 PERCENT.
SATURDAY
* SKY/WEATHER............MOSTLY SUNNY.
* MAX TEMPERATURE........74-83 LOWER ELEVATIONS...EXCEPT 69-76
HIGHER ELEVATIONS.
* 24 HR TREND..........6 DEGREES COOLER.
* MIN HUMIDITY...........34-49 PERCENT.
* 24 HR TREND..........16 PERCENT UP.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...SOUTHWEST WINDS 5 TO 11 MPH.
* RIDGES/UPR SLOPES....SOUTHWEST WINDS 5 TO 11 MPH.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........5400 FT AGL.
* CHANCE OF THUNDER......6 PERCENT.
SATURDAY NIGHT
* SKY/WEATHER............MOSTLY CLEAR. A SLIGHT CHANCE OF SHOWERS
AND THUNDERSTORMS IN THE EVENING, THEN A SLIGHT CHANCE OF SHOWERS
AFTER MIDNIGHT.
* MIN TEMPERATURE........48-58.
* MAX HUMIDITY...........72-87 PERCENT...EXCEPT 80-95 PERCENT IN
THE HIGH MOUNTAIN VALLEYS.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...SOUTH WINDS 4 TO 10 MPH.
* RIDGES/UPR SLOPES....SOUTH WINDS 4 TO 10 MPH.
* MIXING HEIGHT..........900 FT AGL.
* CWR....................0 PERCENT.
* CHANCE OF THUNDER......10 PERCENT.
SUNDAY
* SKY/WEATHER............PARTLY CLOUDY EARLY IN THE MORNING THEN
CLEARING. A SLIGHT CHANCE OF SHOWERS IN THE MORNING, THEN A
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE........69-77 LOWER ELEVATIONS...EXCEPT 63-71
HIGHER ELEVATIONS.
* MIN HUMIDITY...........43-58 PERCENT.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...SOUTH WINDS 4 TO 10 MPH.
* RIDGES/UPR SLOPES....SOUTH WINDS 4 TO 10 MPH.
* MIXING HEIGHT..........5200 FT AGL.
* CWR....................10 PERCENT.
* CHANCE OF THUNDER......13 PERCENT.
CAZ221-269-161945-
STANISLAUS NF WEST OF THE SIERRA CREST-
NORTHERN SIERRA INCLUDING THE TAHOE AND ELDORADO NF/S WEST OF THE
SIERRA CREST-
1244 PM PDT FRI AUG 15 2025
TONIGHT
* SKY/WEATHER............CLEAR.
* MIN TEMPERATURE........56-64 LOWER ELEVATIONS...EXCEPT 45-55
HIGHER ELEVATIONS.
* 24 HR TREND..........LITTLE CHANGE.
* MAX HUMIDITY...........61-76 PERCENT.
* 24 HR TREND..........16 PERCENT UP.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...SOUTHWEST WINDS UP TO 8 MPH IN THE EVENING
BECOMING DRAINAGE UP TO 5 MPH.
* RIDGES/UPR SLOPES....SOUTHWEST WINDS 5 TO 11 MPH SHIFTING TO THE
SOUTHEAST UP TO 8 MPH AFTER MIDNIGHT.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........500 FT AGL.
* CHANCE OF THUNDER......1 PERCENT.
SATURDAY
* SKY/WEATHER............SUNNY.
* MAX TEMPERATURE........77-83 LOWER ELEVATIONS...EXCEPT 67-77
HIGHER ELEVATIONS.
* 24 HR TREND..........5 DEGREES COOLER.
* MIN HUMIDITY...........32-44 PERCENT.
* 24 HR TREND..........13 PERCENT UP.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...SOUTHWEST WINDS 6 TO 12 MPH.
* RIDGES/UPR SLOPES....SOUTHWEST WINDS 6 TO 12 MPH WITH LOCAL GUSTS
UP TO 25 MPH.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........4700 FT AGL.
* CHANCE OF THUNDER......2 PERCENT.
SATURDAY NIGHT
* SKY/WEATHER............CLEAR.
* MIN TEMPERATURE........55-61 LOWER ELEVATIONS...EXCEPT 43-53
HIGHER ELEVATIONS.
* MAX HUMIDITY...........72-87 PERCENT.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...SOUTHWEST WINDS 4 TO 9 MPH IN THE EVENING
BECOMING DRAINAGE UP TO 5 MPH.
* RIDGES/UPR SLOPES....SOUTH WINDS 5 TO 11 MPH.
* MIXING HEIGHT..........600 FT AGL.
* CWR....................0 PERCENT.
* CHANCE OF THUNDER......2 PERCENT.
SUNDAY
* SKY/WEATHER............SUNNY.
* MAX TEMPERATURE........74-80 LOWER ELEVATIONS...EXCEPT 63-73
HIGHER ELEVATIONS.
* MIN HUMIDITY...........46-61 PERCENT.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...UPSLOPE WINDS UP TO 5 MPH BECOMING SOUTHWEST
4 TO 9 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....SOUTH WINDS 5 TO 11 MPH.
* MIXING HEIGHT..........5300 FT AGL.
* CWR....................0 PERCENT.
* CHANCE OF THUNDER......3 PERCENT.
EXTENDED
...SHASTA COUNTY MOUNTAINS AND COASTAL RANGE
SUNDAY NIGHT
MOSTLY CLEAR. LOWS 48 TO 57. SOUTHWEST WINDS UP
TO 10 MPH.
MONDAY
SUNNY. HIGHS 71 TO 81. SOUTHEAST WINDS 5 TO 15 MPH.
MONDAY NIGHT
CLEAR. LOWS 48 TO 58. WEST WINDS UP TO 10 MPH.
TUESDAY
SUNNY. HIGHS 76 TO 86. VARIABLE LESS THAN 5 MPH.
TUESDAY NIGHT
CLEAR. LOWS 51 TO 61. VARIABLE LESS THAN 5 MPH.
WEDNESDAY
WARMER, SUNNY. HIGHS 82 TO 92. VARIABLE LESS THAN
5 MPH.
WEDNESDAY NIGHT
CLEAR. LOWS 55 TO 65. NORTHWEST WINDS UP TO
10 MPH.
...NORTHERN SIERRA AND LASSEN PARK
SUNDAY NIGHT
CLEAR. LOWS 47 TO 57. SOUTHEAST WINDS UP TO
10 MPH.
MONDAY
SUNNY. HIGHS 73 TO 83. SOUTH WINDS 5 TO 15 MPH.
MONDAY NIGHT
CLEAR. LOWS 48 TO 58. EAST WINDS UP TO 10 MPH.
TUESDAY
SUNNY. HIGHS 77 TO 87. SOUTHWEST WINDS UP TO 10 MPH.
TUESDAY NIGHT
CLEAR. LOWS 50 TO 60. VARIABLE LESS THAN 5 MPH.
WEDNESDAY
SUNNY. HIGHS 83 TO 92. VARIABLE LESS THAN 5 MPH.
WEDNESDAY NIGHT
CLEAR. LOWS 55 TO 65. VARIABLE LESS THAN
5 MPH.
...SIERRA NEVADA FOOTHILLS
SUNDAY NIGHT
CLEAR. LOWS 55 TO 60. SOUTHEAST WINDS UP TO
10 MPH.
MONDAY
SUNNY. HIGHS 80 TO 85. SOUTHWEST WINDS UP TO 10 MPH.
MONDAY NIGHT
CLEAR. LOWS 56 TO 62. EAST WINDS UP TO 10 MPH.
TUESDAY
SUNNY. HIGHS 84 TO 89. VARIABLE LESS THAN 5 MPH.
TUESDAY NIGHT
CLEAR. LOWS 60 TO 65. VARIABLE LESS THAN 5 MPH.
WEDNESDAY
SUNNY. HIGHS 90 TO 95. VARIABLE LESS THAN 5 MPH.
WEDNESDAY NIGHT
CLEAR. LOWS 65 TO 70. VARIABLE LESS THAN
5 MPH.
...CENTRAL VALLEY AND DELTA
SUNDAY NIGHT
CLEAR. LOWS 54 TO 59. SOUTH WINDS 5 TO 15 MPH.
MONDAY
SUNNY. HIGHS 84 TO 89. SOUTHWEST WINDS 5 TO 15 MPH.
MONDAY NIGHT
CLEAR. LOWS 55 TO 60. SOUTH WINDS 5 TO 15 MPH.
TUESDAY
SUNNY. HIGHS 88 TO 93. WEST WINDS UP TO 10 MPH.
TUESDAY NIGHT
CLEAR. LOWS 57 TO 62. SOUTHWEST WINDS UP TO
10 MPH.
WEDNESDAY
SUNNY. HIGHS 94 TO 99. NORTHWEST WINDS UP TO 10 MPH.
WEDNESDAY NIGHT
CLEAR. LOWS 61 TO 66. SOUTHWEST WINDS UP TO
10 MPH.
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