100
FNUS56 KSTO 152020
FWFSTO
FIRE WEATHER PLANNING FORECAST FOR INTERIOR NORTHERN CALIFORNIA
NATIONAL WEATHER SERVICE SACRAMENTO CA
120 PM PDT MON SEP 15 2025
..CHANCE OF THUNDERSTORMS THURSDAY THROUGH SATURDAY
DISCUSSION
WARM AND DRY CONDITIONS PREVAIL THROUGH WEDNESDAY WITH ABOVE
NORMAL TEMPERATURES, LOWER RELATIVE HUMIDITY, AND LIGHT WINDS.
A SURGE OF MOISTURE WILL BRING SHOWER AND THUNDERSTORM CHANCES TO
THE AREA LATER THIS WEEK, ALONG WITH COOLER TEMPERATURES, HIGHER
RELATIVE HUMIDITY, AND PERIODICALLY BREEZY ONSHORE WINDS.
LIGHTNING FROM THUNDERSTORMS WILL LEAD TO ELEVATED FIRE WEATHER
CONCERNS THURSDAY THROUGH SATURDAY, INCLUDING THURSDAY NIGHT INTO
FRIDAY MORNING.
CAZ213-162030-
EASTERN PORTION OF SHASTA-TRINITY NF-
120 PM PDT MON SEP 15 2025
TONIGHT
* SKY/WEATHER............CLEAR.
* MIN TEMPERATURE........59-65 LOWER ELEVATIONS...EXCEPT 49-59
HIGHER ELEVATIONS.
* 24 HR TREND..........4 DEGREES WARMER.
* MAX HUMIDITY...........35-50 PERCENT.
* 24 HR TREND..........20 PERCENT DOWN.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...DRAINAGE WINDS UP TO 5 MPH BECOMING NORTH UP
TO 8 MPH AFTER MIDNIGHT.
* RIDGES/UPR SLOPES....WEST WINDS UP TO 8 MPH SHIFTING TO THE
NORTHEAST 4 TO 9 MPH AFTER MIDNIGHT.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........700 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
TUESDAY
* SKY/WEATHER............SUNNY.
* MAX TEMPERATURE........91-96 LOWER ELEVATIONS...EXCEPT 81-90
HIGHER ELEVATIONS.
* 24 HR TREND..........LITTLE CHANGE.
* MIN HUMIDITY...........15-20 PERCENT.
* 24 HR TREND..........LITTLE CHANGE.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...NORTH WINDS UP TO 8 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 8 MPH IN THE AFTERNOON.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........5500 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
TUESDAY NIGHT
* SKY/WEATHER............CLEAR.
* MIN TEMPERATURE........61-67 LOWER ELEVATIONS...EXCEPT 52-62
HIGHER ELEVATIONS.
* MAX HUMIDITY...........40-55 PERCENT.
* 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 7 MPH SHIFTING TO THE NORTH
4 TO 9 MPH AFTER MIDNIGHT.
* MIXING HEIGHT..........700 FT AGL.
* CWR....................0 PERCENT.
* CHANCE OF THUNDER......0 PERCENT.
WEDNESDAY
* SKY/WEATHER............SUNNY.
* MAX TEMPERATURE........93-98 LOWER ELEVATIONS...EXCEPT 83-93
HIGHER ELEVATIONS.
* MIN HUMIDITY...........12-23 PERCENT.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...NORTH WINDS UP TO 8 MPH IN THE MORNING
BECOMING UPSLOPE UP TO 5 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 4 TO 9 MPH IN THE MORNING
BECOMING VARIABLE UP TO 5 MPH.
* MIXING HEIGHT..........7100 FT AGL.
* CWR....................0 PERCENT.
* CHANCE OF THUNDER......0 PERCENT.
CAZ214-162030-
BURNEY BASIN AND NORTHEAST PLATEAU IN SHASTA COUNTY INCLUDING
NORTHWEST LASSEN NF NORTH OF LASSEN NP-
120 PM PDT MON SEP 15 2025
TONIGHT
* SKY/WEATHER............CLEAR.
* MIN TEMPERATURE........43-50.
* 24 HR TREND..........4 DEGREES WARMER.
* MAX HUMIDITY...........57-64 PERCENT LOWER ELEVATIONS...EXCEPT
46-56 PERCENT HIGH ELEVATIONS.
* 24 HR TREND..........26 PERCENT DOWN.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...DRAINAGE WINDS UP TO 5 MPH.
* RIDGES/UPR SLOPES....VARIABLE WINDS UP TO 5 MPH BECOMING
SOUTHEAST UP TO 8 MPH AFTER MIDNIGHT.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........700 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
TUESDAY
* SKY/WEATHER............SUNNY.
* MAX TEMPERATURE........86-91 LOWER ELEVATIONS...EXCEPT 80-85
HIGHER ELEVATIONS.
* 24 HR TREND..........LITTLE CHANGE.
* MIN HUMIDITY...........17-22 PERCENT.
* 24 HR TREND..........LITTLE CHANGE.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...UPSLOPE WINDS UP TO 5 MPH BECOMING WEST UP
TO 8 MPH WITH LOCAL GUSTS UP TO 20 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....EAST WINDS UP TO 8 MPH SHIFTING TO THE WEST
WITH LOCAL GUSTS UP TO 20 MPH IN THE AFTERNOON.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........7000 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
TUESDAY NIGHT
* SKY/WEATHER............CLEAR.
* MIN TEMPERATURE........46-52.
* MAX HUMIDITY...........45-60 PERCENT.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...WEST WINDS UP TO 8 MPH WITH LOCAL GUSTS UP
TO 20 MPH IN THE EVENING BECOMING DRAINAGE UP TO 5 MPH.
* RIDGES/UPR SLOPES....WEST WINDS UP TO 8 MPH WITH LOCAL GUSTS UP
TO 20 MPH SHIFTING TO THE SOUTHEAST UP TO 7 MPH AFTER MIDNIGHT.
* MIXING HEIGHT..........700 FT AGL.
* CWR....................0 PERCENT.
* CHANCE OF THUNDER......0 PERCENT.
WEDNESDAY
* SKY/WEATHER............SUNNY.
* MAX TEMPERATURE........88-93 LOWER ELEVATIONS...EXCEPT 81-87
HIGHER ELEVATIONS.
* MIN HUMIDITY...........15-22 PERCENT.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...UPSLOPE WINDS UP TO 5 MPH.
* RIDGES/UPR SLOPES....VARIABLE WINDS UP TO 7 MPH.
* MIXING HEIGHT..........8100 FT AGL.
* CWR....................0 PERCENT.
* CHANCE OF THUNDER......0 PERCENT.
CAZ215-162030-
NORTHERN SACRAMENTO VALLEY TO SOUTHERN TEHAMA COUNTY LINE BELOW
1000 FT-
120 PM PDT MON SEP 15 2025
TONIGHT
* SKY/WEATHER............CLEAR.
* MIN TEMPERATURE........60-65.
* 24 HR TREND..........LITTLE CHANGE.
* MAX HUMIDITY...........41-55 PERCENT.
* 24 HR TREND..........13 PERCENT DOWN.
* 20-FOOT WINDS..........SOUTH WINDS UP TO 6 MPH SHIFTING TO THE
NORTH UP TO 7 MPH AFTER MIDNIGHT.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........600 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
TUESDAY
* SKY/WEATHER............SUNNY.
* MAX TEMPERATURE........93-98.
* 24 HR TREND..........LITTLE CHANGE.
* MIN HUMIDITY...........17-22 PERCENT.
* 24 HR TREND..........LITTLE CHANGE.
* 20-FOOT WINDS..........NORTH WINDS UP TO 8 MPH SHIFTING TO THE
SOUTH UP TO 7 MPH IN THE AFTERNOON.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........5700 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
TUESDAY NIGHT
* SKY/WEATHER............CLEAR.
* MIN TEMPERATURE........63-68.
* MAX HUMIDITY...........40-55 PERCENT.
* 20-FOOT WINDS..........SOUTH WINDS UP TO 7 MPH SHIFTING TO THE
NORTH AFTER MIDNIGHT.
* MIXING HEIGHT..........600 FT AGL.
* CWR....................0 PERCENT.
* CHANCE OF THUNDER......0 PERCENT.
WEDNESDAY
* SKY/WEATHER............SUNNY.
* MAX TEMPERATURE........96-101.
* MIN HUMIDITY...........13-24 PERCENT.
* 20-FOOT WINDS..........NORTH WINDS UP TO 8 MPH.
* MIXING HEIGHT..........6300 FT AGL.
* CWR....................0 PERCENT.
* CHANCE OF THUNDER......0 PERCENT.
CAZ216-162030-
CENTRAL SACRAMENTO VALLEY IN GLENN, COLUSA, YUBA, NORTHERN
SUTTER, AND BUTTE COUNTY BELOW 1000 FT-
120 PM PDT MON SEP 15 2025
TONIGHT
* SKY/WEATHER............CLEAR.
* MIN TEMPERATURE........58-65.
* 24 HR TREND..........LITTLE CHANGE.
* MAX HUMIDITY...........53-68 PERCENT.
* 24 HR TREND..........14 PERCENT DOWN.
* 20-FOOT WINDS..........SOUTHEAST WINDS UP TO 6 MPH SHIFTING TO
THE NORTH UP TO 7 MPH AFTER MIDNIGHT.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........500 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
TUESDAY
* SKY/WEATHER............SUNNY.
* MAX TEMPERATURE........92-97.
* 24 HR TREND..........LITTLE CHANGE.
* MIN HUMIDITY...........23-30 PERCENT.
* 24 HR TREND..........LITTLE CHANGE.
* 20-FOOT WINDS..........NORTH WINDS UP TO 8 MPH SHIFTING TO THE
SOUTH IN THE AFTERNOON.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........4900 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
TUESDAY NIGHT
* SKY/WEATHER............CLEAR.
* MIN TEMPERATURE........60-66.
* MAX HUMIDITY...........46-61 PERCENT.
* 20-FOOT WINDS..........SOUTH WINDS UP TO 7 MPH SHIFTING TO THE
NORTHEAST AFTER MIDNIGHT.
* MIXING HEIGHT..........500 FT AGL.
* CWR....................0 PERCENT.
* CHANCE OF THUNDER......0 PERCENT.
WEDNESDAY
* SKY/WEATHER............SUNNY.
* MAX TEMPERATURE........93-98.
* MIN HUMIDITY...........18-33 PERCENT.
* 20-FOOT WINDS..........NORTH WINDS UP TO 8 MPH.
* MIXING HEIGHT..........5900 FT AGL.
* CWR....................0 PERCENT.
* CHANCE OF THUNDER......0 PERCENT.
CAZ217-162030-
SOUTHERN SACRAMENTO VALLEY IN YOLO-
SACRAMENTO FAR WESTERN PLACER, SOUTHERN SUTTER AND SOLANO COUNTY
BELOW 1000 FT-
120 PM PDT MON SEP 15 2025
TONIGHT
* SKY/WEATHER............CLEAR.
* MIN TEMPERATURE........59-65.
* 24 HR TREND..........4 DEGREES WARMER.
* MAX HUMIDITY...........57-72 PERCENT.
* 24 HR TREND..........13 PERCENT DOWN.
* 20-FOOT WINDS..........SOUTH WINDS UP TO 6 MPH.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........400 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
TUESDAY
* SKY/WEATHER............SUNNY.
* MAX TEMPERATURE........94-99.
* 24 HR TREND..........LITTLE CHANGE.
* MIN HUMIDITY...........20-25 PERCENT.
* 24 HR TREND..........LITTLE CHANGE.
* 20-FOOT WINDS..........NORTHWEST WINDS UP TO 7 MPH SHIFTING TO
THE SOUTHWEST IN THE AFTERNOON.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........5400 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
TUESDAY NIGHT
* SKY/WEATHER............CLEAR.
* MIN TEMPERATURE........61-67.
* MAX HUMIDITY...........44-59 PERCENT.
* 20-FOOT WINDS..........SOUTHWEST WINDS UP TO 8 MPH.
* MIXING HEIGHT..........400 FT AGL.
* CWR....................0 PERCENT.
* CHANCE OF THUNDER......0 PERCENT.
WEDNESDAY
* SKY/WEATHER............SUNNY.
* MAX TEMPERATURE........96-101.
* MIN HUMIDITY...........16-28 PERCENT.
* 20-FOOT WINDS..........NORTHWEST WINDS UP TO 8 MPH.
* MIXING HEIGHT..........5500 FT AGL.
* CWR....................0 PERCENT.
* CHANCE OF THUNDER......0 PERCENT.
CAZ218-162030-
CARQUINEZ STRAIT AND DELTA-
120 PM PDT MON SEP 15 2025
TONIGHT
* SKY/WEATHER............CLEAR.
* MIN TEMPERATURE........60-65.
* 24 HR TREND..........LITTLE CHANGE.
* MAX HUMIDITY...........72-80 PERCENT.
* 24 HR TREND..........12 PERCENT DOWN.
* 20-FOOT WINDS..........WEST WINDS 4 TO 9 MPH.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........500 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
TUESDAY
* SKY/WEATHER............SUNNY.
* MAX TEMPERATURE........91-96.
* 24 HR TREND..........LITTLE CHANGE.
* MIN HUMIDITY...........24-29 PERCENT.
* 24 HR TREND..........LITTLE CHANGE.
* 20-FOOT WINDS..........WEST WINDS 4 TO 9 MPH.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........3900 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
TUESDAY NIGHT
* SKY/WEATHER............CLEAR.
* MIN TEMPERATURE........60-65.
* MAX HUMIDITY...........56-71 PERCENT.
* 20-FOOT WINDS..........WEST WINDS 5 TO 11 MPH. LOCAL GUSTS UP TO
20 MPH AFTER MIDNIGHT.
* MIXING HEIGHT..........400 FT AGL.
* CWR....................0 PERCENT.
* CHANCE OF THUNDER......0 PERCENT.
WEDNESDAY
* SKY/WEATHER............SUNNY.
* MAX TEMPERATURE........92-100.
* MIN HUMIDITY...........28-43 PERCENT.
* 20-FOOT WINDS..........WEST WINDS 4 TO 10 MPH.
* MIXING HEIGHT..........4700 FT AGL.
* CWR....................0 PERCENT.
* CHANCE OF THUNDER......0 PERCENT.
CAZ219-162030-
NORTHERN SAN JOAQUIN VALLEY IN SAN JOAQUIN AND STANISLAUS
COUNTIES BELOW 1000 FT-
120 PM PDT MON SEP 15 2025
TONIGHT
* SKY/WEATHER............CLEAR.
* MIN TEMPERATURE........61-67.
* 24 HR TREND..........5 DEGREES WARMER.
* MAX HUMIDITY...........52-67 PERCENT.
* 24 HR TREND..........18 PERCENT DOWN.
* 20-FOOT WINDS..........NORTHWEST WINDS UP TO 7 MPH.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........400 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
TUESDAY
* SKY/WEATHER............SUNNY.
* MAX TEMPERATURE........94-99.
* 24 HR TREND..........4 DEGREES WARMER.
* MIN HUMIDITY...........21-26 PERCENT.
* 24 HR TREND..........LITTLE CHANGE.
* 20-FOOT WINDS..........NORTHWEST WINDS UP TO 8 MPH.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........5600 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
TUESDAY NIGHT
* SKY/WEATHER............CLEAR.
* MIN TEMPERATURE........63-69.
* MAX HUMIDITY...........42-57 PERCENT.
* 20-FOOT WINDS..........NORTHWEST WINDS 5 TO 11 MPH.
* MIXING HEIGHT..........500 FT AGL.
* CWR....................0 PERCENT.
* CHANCE OF THUNDER......0 PERCENT.
WEDNESDAY
* SKY/WEATHER............SUNNY.
* MAX TEMPERATURE........93-99.
* MIN HUMIDITY...........17-29 PERCENT.
* 20-FOOT WINDS..........NORTHWEST WINDS 5 TO 11 MPH.
* MIXING HEIGHT..........5300 FT AGL.
* CWR....................0 PERCENT.
* CHANCE OF THUNDER......0 PERCENT.
CAZ263-279-162030-
SOUTHEAST EDGE SHASTA-TRINITY NF AND WESTERN PORTIONS OF TEHAMA-
GLENN UNIT-EASTERN MENDOCINO NF-
120 PM PDT MON SEP 15 2025
TONIGHT
* SKY/WEATHER............CLEAR.
* MIN TEMPERATURE........64-69 LOWER ELEVATIONS...EXCEPT 57-64
HIGHER ELEVATIONS.
* 24 HR TREND..........4 DEGREES WARMER.
* MAX HUMIDITY...........34-40 PERCENT.
* 24 HR TREND..........18 PERCENT DOWN.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...DRAINAGE WINDS UP TO 5 MPH BECOMING
NORTHWEST UP TO 8 MPH AFTER MIDNIGHT.
* RIDGES/UPR SLOPES....VARIABLE WINDS UP TO 5 MPH BECOMING
NORTHWEST UP TO 8 MPH AFTER MIDNIGHT.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........600 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
TUESDAY
* SKY/WEATHER............SUNNY.
* MAX TEMPERATURE........90-95 LOWER ELEVATIONS...EXCEPT 75-84
HIGHER ELEVATIONS.
* 24 HR TREND..........LITTLE CHANGE.
* MIN HUMIDITY...........20-27 PERCENT.
* 24 HR TREND..........LITTLE CHANGE.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...EAST WINDS 4 TO 9 MPH.
* RIDGES/UPR SLOPES....SOUTHEAST WINDS 4 TO 9 MPH.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........5100 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
TUESDAY NIGHT
* SKY/WEATHER............CLEAR.
* MIN TEMPERATURE........66-71 LOWER ELEVATIONS...EXCEPT 60-66
HIGHER ELEVATIONS.
* MAX HUMIDITY...........34-49 PERCENT.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...WEST WINDS UP TO 8 MPH.
* RIDGES/UPR SLOPES....WEST WINDS UP TO 8 MPH.
* MIXING HEIGHT..........600 FT AGL.
* CWR....................0 PERCENT.
* CHANCE OF THUNDER......0 PERCENT.
WEDNESDAY
* SKY/WEATHER............SUNNY.
* MAX TEMPERATURE........92-97 LOWER ELEVATIONS...EXCEPT 77-87
HIGHER ELEVATIONS.
* MIN HUMIDITY...........17-32 PERCENT.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...NORTHWEST WINDS UP TO 8 MPH SHIFTING TO THE
EAST UP TO 7 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....WEST WINDS 4 TO 9 MPH SHIFTING TO THE
SOUTHEAST UP TO 8 MPH IN THE AFTERNOON.
* MIXING HEIGHT..........6300 FT AGL.
* CWR....................0 PERCENT.
* CHANCE OF THUNDER......0 PERCENT.
CAZ266-162030-
NORTHERN SIERRA FOOTHILLS FROM 1000 TO 3000 FT. INCLUDES PORTIONS
OF SHASTA-TRINITY AND BUTTE UNITS-
120 PM PDT MON SEP 15 2025
TONIGHT
* SKY/WEATHER............CLEAR.
* MIN TEMPERATURE........61-69.
* 24 HR TREND..........4 DEGREES WARMER.
* MAX HUMIDITY...........34-43 PERCENT.
* 24 HR TREND..........14 PERCENT DOWN.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...EAST WINDS 5 TO 11 MPH.
* RIDGES/UPR SLOPES....EAST WINDS 5 TO 11 MPH.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........500 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
TUESDAY
* SKY/WEATHER............SUNNY.
* MAX TEMPERATURE........89-94 LOWER ELEVATIONS...EXCEPT 84-89
HIGHER ELEVATIONS.
* 24 HR TREND..........LITTLE CHANGE.
* MIN HUMIDITY...........19-24 PERCENT.
* 24 HR TREND..........LITTLE CHANGE.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...EAST WINDS 9 TO 15 MPH SHIFTING TO THE
SOUTHWEST UP TO 7 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....EAST WINDS 6 TO 12 MPH IN THE MORNING
BECOMING VARIABLE UP TO 5 MPH.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........5300 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
TUESDAY NIGHT
* SKY/WEATHER............CLEAR.
* MIN TEMPERATURE........64-70.
* MAX HUMIDITY...........31-46 PERCENT.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...EAST WINDS 4 TO 9 MPH.
* RIDGES/UPR SLOPES....VARIABLE WINDS UP TO 5 MPH BECOMING EAST 4
TO 9 MPH AFTER MIDNIGHT.
* MIXING HEIGHT..........500 FT AGL.
* CWR....................0 PERCENT.
* CHANCE OF THUNDER......0 PERCENT.
WEDNESDAY
* SKY/WEATHER............SUNNY.
* MAX TEMPERATURE........91-96 LOWER ELEVATIONS...EXCEPT 86-92
HIGHER ELEVATIONS.
* MIN HUMIDITY...........15-29 PERCENT.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...NORTHEAST WINDS 8 TO 14 MPH IN THE MORNING
BECOMING UPSLOPE UP TO 5 MPH.
* RIDGES/UPR SLOPES....NORTHEAST WINDS 5 TO 11 MPH IN THE MORNING
BECOMING VARIABLE UP TO 5 MPH.
* MIXING HEIGHT..........6000 FT AGL.
* CWR....................0 PERCENT.
* CHANCE OF THUNDER......0 PERCENT.
CAZ220-267-162030-
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-
120 PM PDT MON SEP 15 2025
TONIGHT
* SKY/WEATHER............CLEAR.
* MIN TEMPERATURE........62-67.
* 24 HR TREND..........5 DEGREES WARMER.
* MAX HUMIDITY...........41-48 PERCENT.
* 24 HR TREND..........12 PERCENT DOWN.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...NORTHEAST WINDS UP TO 8 MPH.
* RIDGES/UPR SLOPES....NORTHEAST WINDS UP TO 8 MPH.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........500 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
TUESDAY
* SKY/WEATHER............SUNNY.
* MAX TEMPERATURE........89-94.
* 24 HR TREND..........LITTLE CHANGE.
* MIN HUMIDITY...........19-24 PERCENT.
* 24 HR TREND..........LITTLE CHANGE.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...SOUTHEAST WINDS UP TO 8 MPH SHIFTING TO THE
WEST UP TO 7 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....SOUTHEAST WINDS UP TO 8 MPH SHIFTING TO THE
SOUTHWEST UP TO 7 MPH IN THE AFTERNOON.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........6100 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
TUESDAY NIGHT
* SKY/WEATHER............CLEAR.
* MIN TEMPERATURE........63-69.
* MAX HUMIDITY...........35-50 PERCENT.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...NORTHWEST WINDS UP TO 7 MPH SHIFTING TO THE
NORTHEAST 4 TO 9 MPH AFTER MIDNIGHT.
* RIDGES/UPR SLOPES....NORTHWEST WINDS UP TO 7 MPH SHIFTING TO THE
NORTHEAST UP TO 8 MPH AFTER MIDNIGHT.
* MIXING HEIGHT..........500 FT AGL.
* CWR....................0 PERCENT.
* CHANCE OF THUNDER......0 PERCENT.
WEDNESDAY
* SKY/WEATHER............SUNNY.
* MAX TEMPERATURE........89-95.
* MIN HUMIDITY...........15-25 PERCENT.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...NORTHEAST WINDS 4 TO 9 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.
* MIXING HEIGHT..........6400 FT AGL.
* CWR....................0 PERCENT.
* CHANCE OF THUNDER......0 PERCENT.
CAZ268-162030-
NORTHERN SIERRA INCLUDING LASSEN NP AND PLUMAS AND LASSEN NF/S
WEST OF THE SIERRA CREST (WEST OF EVANS PEAK-GRIZZLY PEAK-
BECKWORTH PEAK)-
120 PM PDT MON SEP 15 2025
TONIGHT
* SKY/WEATHER............CLEAR.
* MIN TEMPERATURE........47-57.
* 24 HR TREND..........4 DEGREES WARMER.
* MAX HUMIDITY...........40-55 PERCENT...EXCEPT 59-74 PERCENT IN
THE HIGH MOUNTAIN VALLEYS.
* 24 HR TREND..........18 PERCENT DOWN.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...SOUTH WINDS 4 TO 9 MPH SHIFTING TO THE EAST
5 TO 11 MPH AFTER MIDNIGHT.
* RIDGES/UPR SLOPES....SOUTH WINDS 4 TO 10 MPH SHIFTING TO THE EAST
5 TO 11 MPH AFTER MIDNIGHT.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........300 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
TUESDAY
* SKY/WEATHER............SUNNY.
* MAX TEMPERATURE........79-86 LOWER ELEVATIONS...EXCEPT 73-79
HIGHER ELEVATIONS.
* 24 HR TREND..........LITTLE CHANGE.
* MIN HUMIDITY...........19-26 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....SOUTHEAST WINDS 6 TO 12 MPH SHIFTING TO THE
SOUTHWEST UP TO 8 MPH IN THE AFTERNOON.
* CWR....................0 PERCENT.
* MIXING HEIGHT..........5700 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
TUESDAY NIGHT
* SKY/WEATHER............CLEAR.
* MIN TEMPERATURE........49-59.
* MAX HUMIDITY...........41-56 PERCENT...EXCEPT 56-71 PERCENT IN
THE HIGH MOUNTAIN VALLEYS.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...SOUTHWEST WINDS UP TO 7 MPH SHIFTING TO THE
EAST 4 TO 9 MPH AFTER MIDNIGHT.
* RIDGES/UPR SLOPES....SOUTHWEST WINDS UP TO 7 MPH SHIFTING TO THE
EAST 4 TO 9 MPH AFTER MIDNIGHT.
* MIXING HEIGHT..........300 FT AGL.
* CWR....................0 PERCENT.
* CHANCE OF THUNDER......0 PERCENT.
WEDNESDAY
* SKY/WEATHER............SUNNY.
* MAX TEMPERATURE........81-87 LOWER ELEVATIONS...EXCEPT 74-82
HIGHER ELEVATIONS.
* MIN HUMIDITY...........15-30 PERCENT.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...NORTHEAST WINDS 5 TO 11 MPH SHIFTING TO THE
SOUTHWEST UP TO 7 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....EAST WINDS 6 TO 12 MPH IN THE MORNING
BECOMING VARIABLE UP TO 5 MPH.
* MIXING HEIGHT..........7400 FT AGL.
* CWR....................0 PERCENT.
* CHANCE OF THUNDER......0 PERCENT.
CAZ221-269-162030-
STANISLAUS NF WEST OF THE SIERRA CREST-
NORTHERN SIERRA INCLUDING THE TAHOE AND ELDORADO NF/S WEST OF THE
SIERRA CREST-
120 PM PDT MON SEP 15 2025
TONIGHT
* SKY/WEATHER............CLEAR.
* MIN TEMPERATURE........56-65 LOWER ELEVATIONS...EXCEPT 45-55
HIGHER ELEVATIONS.
* 24 HR TREND..........4 DEGREES WARMER.
* MAX HUMIDITY...........42-57 PERCENT.
* 24 HR TREND..........9 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..........300 FT AGL.
* CHANCE OF THUNDER......0 PERCENT.
TUESDAY
* SKY/WEATHER............SUNNY.
* MAX TEMPERATURE........84-89 LOWER ELEVATIONS...EXCEPT 71-81
HIGHER ELEVATIONS.
* 24 HR TREND..........LITTLE CHANGE.
* MIN HUMIDITY...........21-27 PERCENT.
* 24 HR TREND..........LITTLE CHANGE.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...SOUTHEAST WINDS UP TO 8 MPH SHIFTING TO THE
SOUTHWEST 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..........5800 FT AGL.
* CHANCE OF THUNDER......1 PERCENT.
TUESDAY NIGHT
* SKY/WEATHER............CLEAR.
* MIN TEMPERATURE........59-67 LOWER ELEVATIONS...EXCEPT 48-58
HIGHER ELEVATIONS.
* MAX HUMIDITY...........41-56 PERCENT.
* 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....WEST WINDS UP TO 8 MPH SHIFTING TO THE EAST
5 TO 11 MPH AFTER MIDNIGHT.
* MIXING HEIGHT..........300 FT AGL.
* CWR....................0 PERCENT.
* CHANCE OF THUNDER......0 PERCENT.
WEDNESDAY
* SKY/WEATHER............SUNNY.
* MAX TEMPERATURE........85-91 LOWER ELEVATIONS...EXCEPT 72-82
HIGHER ELEVATIONS.
* MIN HUMIDITY...........18-33 PERCENT.
* 20-FOOT WINDS..........
* VALLEYS/LWR SLOPES...EAST WINDS UP TO 8 MPH SHIFTING TO THE WEST
IN THE AFTERNOON.
* RIDGES/UPR SLOPES....EAST WINDS 4 TO 10 MPH SHIFTING TO THE WEST
UP TO 8 MPH IN THE AFTERNOON.
* MIXING HEIGHT..........7800 FT AGL.
* CWR....................0 PERCENT.
* CHANCE OF THUNDER......0 PERCENT.
EXTENDED
...SHASTA COUNTY MOUNTAINS AND COASTAL RANGE
WEDNESDAY NIGHT
MOSTLY CLEAR. LOWS 54 TO 64. NORTHWEST WINDS
UP TO 10 MPH.
THURSDAY
MOSTLY SUNNY. HIGHS 79 TO 89. SOUTHEAST WINDS UP TO
10 MPH.
THURSDAY NIGHT
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS.
LOWS 54 TO 64. WEST WINDS UP TO 10 MPH.
FRIDAY
MOSTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS. HIGHS
69 TO 79. VARIABLE LESS THAN 5 MPH.
FRIDAY NIGHT
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS.
LOWS 52 TO 62. VARIABLE LESS THAN 5 MPH.
SATURDAY
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS. HIGHS
72 TO 82. VARIABLE LESS THAN 5 MPH.
SATURDAY NIGHT
MOSTLY CLEAR. LOWS 51 TO 61. VARIABLE LESS THAN
5 MPH.
...NORTHERN SIERRA AND LASSEN PARK
WEDNESDAY NIGHT
MOSTLY CLEAR. LOWS 53 TO 63. NORTHEAST WINDS
UP TO 10 MPH.
THURSDAY
PARTLY CLOUDY. HIGHS 79 TO 88. SOUTH WINDS 5 TO
15 MPH.
THURSDAY NIGHT
MOSTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS.
LOWS 52 TO 62. VARIABLE LESS THAN 5 MPH.
FRIDAY
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS AND A SLIGHT
CHANCE OF THUNDERSTORMS. HIGHS 72 TO 81. VARIABLE LESS THAN
5 MPH.
FRIDAY NIGHT
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS.
LOWS 51 TO 61. VARIABLE LESS THAN 5 MPH.
SATURDAY
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS. HIGHS
73 TO 82. VARIABLE LESS THAN 5 MPH.
SATURDAY NIGHT
MOSTLY CLEAR. LOWS 50 TO 60. VARIABLE LESS THAN
5 MPH.
...SIERRA NEVADA FOOTHILLS
WEDNESDAY NIGHT
MOSTLY CLEAR. LOWS 64 TO 70. NORTHEAST WINDS
UP TO 10 MPH.
THURSDAY
PARTLY CLOUDY. HIGHS 84 TO 89. SOUTHWEST WINDS 5 TO
15 MPH.
THURSDAY NIGHT
MOSTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS
AND THUNDERSTORMS. LOWS 62 TO 67. EAST WINDS UP TO 10 MPH.
FRIDAY
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS. HIGHS 78 TO 84.
VARIABLE LESS THAN 5 MPH.
FRIDAY NIGHT
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS.
LOWS 61 TO 66. VARIABLE LESS THAN 5 MPH.
SATURDAY
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS. HIGHS
80 TO 85. VARIABLE LESS THAN 5 MPH.
SATURDAY NIGHT
MOSTLY CLEAR. LOWS 61 TO 66. VARIABLE LESS THAN
5 MPH.
...CENTRAL VALLEY AND DELTA
WEDNESDAY NIGHT
MOSTLY CLEAR. LOWS 62 TO 67. WEST WINDS 5 TO
15 MPH.
THURSDAY
PARTLY CLOUDY. HIGHS 87 TO 92. SOUTHWEST WINDS 5 TO
15 MPH.
THURSDAY NIGHT
MOSTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS
AND THUNDERSTORMS. LOWS 62 TO 67. SOUTH WINDS 5 TO 15 MPH.
FRIDAY
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS. HIGHS
82 TO 87. VARIABLE LESS THAN 5 MPH.
FRIDAY NIGHT
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS.
LOWS 62 TO 67. VARIABLE LESS THAN 5 MPH.
SATURDAY
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS. HIGHS
85 TO 90. VARIABLE LESS THAN 5 MPH.
SATURDAY NIGHT
MOSTLY CLEAR. LOWS 61 TO 66. SOUTHWEST WINDS UP
TO 10 MPH.
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