Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Sacramento, CA
Issued by NWS Sacramento, CA
555
FNUS56 KSTO 110730
FWFSTO
Fire Weather Planning Forecast for Interior Northern California
National Weather Service Sacramento CA
1230 AM PDT Thu Sep 11 2025
NOTE: THIS PRODUCT HAS UPDATED FORECAST DATA BUT THE FORECAST
DISCUSSION IS FROM THE PREVIOUS DAY.
...Thunderstorm Chances through Thursday...
.DISCUSSION...A weather system will bring showers and
thunderstorms, breezy onshore winds, and cooler temperatures
through Thursday. The best chances are over the mountains north of
I-80, with highest potential Wednesday afternoon and evening.
Lingering showers over the Sierra crest south of I-80 on Friday
afternoon. Drier weather Saturday, with chances mountain showers
on Sunday. Above normal temperatures and dry weather next week.
CAZ213-120000-
Eastern Portion of Shasta-Trinity NF-
1230 AM PDT Thu Sep 11 2025
.TODAY...
* Sky/Weather............Partly cloudy. A chance of showers and a
slight chance of thunderstorms in the afternoon.
* Max Temperature........77-82 lower elevations...except 67-76
higher elevations.
* 24 HR Trend..........Little change.
* Min Humidity...........43-58 percent.
* 24 HR Trend..........9 percent down.
* 20-Foot Winds..........
* Valleys/Lwr Slopes...Upslope winds up to 5 mph.
* Ridges/Upr Slopes....Variable winds up to 7 mph.
* CWR....................10 percent.
* Mixing Height..........5200 ft AGL.
* Chance of thunder......15 percent.
.TONIGHT...
* Sky/Weather............Partly cloudy. A slight chance of showers
in the evening.
* Min Temperature........55-61 lower elevations...except 46-56
higher elevations.
* 24 HR Trend..........Little change.
* Max Humidity...........79-94 percent.
* 24 HR Trend..........10 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....North winds up to 8 mph.
* CWR....................10 percent.
* Mixing Height..........700 ft AGL.
* Chance of thunder......12 percent.
.FRIDAY...
* Sky/Weather............Sunny.
* Max Temperature........85-90 lower elevations...except 74-84
higher elevations.
* Min Humidity...........30-45 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....Northeast winds up to 8 mph.
* Mixing Height..........6800 ft AGL.
* CWR....................0 percent.
* Chance of thunder......1 percent.
$$
CAZ214-120000-
Burney Basin and Northeast Plateau in Shasta County Including
Northwest Lassen NF north of Lassen NP-
1230 AM PDT Thu Sep 11 2025
.TODAY...
* Sky/Weather............Mostly cloudy. A chance of showers and a
slight chance of thunderstorms in the afternoon.
* Max Temperature........70-75 lower elevations...except 64-69
higher elevations.
* 24 HR Trend..........Little change.
* Min Humidity...........53-62 percent.
* 24 HR Trend..........4 percent down.
* 20-Foot Winds..........
* Valleys/Lwr Slopes...Upslope winds up to 5 mph becoming west up
to 7 mph in the afternoon.
* Ridges/Upr Slopes....Variable winds up to 7 mph becoming west up
to 7 mph in the afternoon.
* CWR....................10 percent.
* Mixing Height..........6400 ft AGL.
* Chance of thunder......18 percent.
.TONIGHT...
* Sky/Weather............Mostly cloudy with a slight chance of
showers in the evening, then partly cloudy after midnight.
* Min Temperature........44-49.
* 24 HR Trend..........Little change.
* Max Humidity...........95-100 percent.
* 24 HR Trend..........Little change.
* 20-Foot Winds..........
* Valleys/Lwr Slopes...Drainage winds up to 5 mph.
* Ridges/Upr Slopes....Variable winds up to 5 mph.
* CWR....................10 percent.
* Mixing Height..........800 ft AGL.
* Chance of thunder......14 percent.
.FRIDAY...
* Sky/Weather............Partly cloudy early in the morning then
clearing.
* Max Temperature........76-81 lower elevations...except 70-76
higher elevations.
* Min Humidity...........35-50 percent.
* 20-Foot Winds..........
* Valleys/Lwr Slopes...Upslope winds up to 5 mph.
* Ridges/Upr Slopes....Variable winds up to 7 mph.
* Mixing Height..........6800 ft AGL.
* CWR....................0 percent.
* Chance of thunder......2 percent.
$$
CAZ215-120000-
Northern Sacramento Valley to Southern Tehama County Line Below
1000 Ft-
1230 AM PDT Thu Sep 11 2025
.TODAY...
* Sky/Weather............Mostly sunny. A slight chance of showers
in the afternoon.
* Max Temperature........79-84.
* 24 HR Trend..........Little change.
* Min Humidity...........41-50 percent.
* 24 HR Trend..........13 percent down.
* 20-Foot Winds..........Southeast winds up to 6 mph.
* CWR....................0 percent.
* Mixing Height..........5900 ft AGL.
* Chance of thunder......11 percent.
.TONIGHT...
* Sky/Weather............Mostly clear.
* Min Temperature........58-63.
* 24 HR Trend..........Little change.
* Max Humidity...........75-89 percent.
* 24 HR Trend..........13 percent down.
* 20-Foot Winds..........East winds up to 5 mph shifting to the
north up to 7 mph after midnight.
* CWR....................0 percent.
* Mixing Height..........600 ft AGL.
* Chance of thunder......7 percent.
.FRIDAY...
* Sky/Weather............Sunny.
* Max Temperature........87-92.
* Min Humidity...........27-42 percent.
* 20-Foot Winds..........North winds 4 to 9 mph.
* Mixing Height..........6200 ft AGL.
* CWR....................0 percent.
* Chance of thunder......1 percent.
$$
CAZ216-120000-
Central Sacramento Valley in Glenn, Colusa, Yuba, Northern
Sutter, and Butte County Below 1000 Ft-
1230 AM PDT Thu Sep 11 2025
.TODAY...
* Sky/Weather............Mostly sunny. A slight chance of showers
in the afternoon.
* Max Temperature........78-83.
* 24 HR Trend..........Little change.
* Min Humidity...........48-62 percent.
* 24 HR Trend..........12 percent down.
* 20-Foot Winds..........South winds up to 6 mph.
* CWR....................0 percent.
* Mixing Height..........6000 ft AGL.
* Chance of thunder......7 percent.
.TONIGHT...
* Sky/Weather............Mostly clear.
* Min Temperature........57-62.
* 24 HR Trend..........Little change.
* Max Humidity...........83-98 percent.
* 24 HR Trend..........8 percent down.
* 20-Foot Winds..........South winds up to 6 mph shifting to the
north up to 7 mph after midnight.
* CWR....................0 percent.
* Mixing Height..........500 ft AGL.
* Chance of thunder......3 percent.
.FRIDAY...
* Sky/Weather............Sunny.
* Max Temperature........85-90.
* Min Humidity...........38-53 percent.
* 20-Foot Winds..........North winds up to 8 mph.
* Mixing Height..........4800 ft AGL.
* CWR....................0 percent.
* Chance of thunder......1 percent.
$$
CAZ217-120000-
Southern Sacramento Valley in Yolo-
Sacramento Far Western Placer, southern Sutter and Solano County
Below 1000 Ft-
1230 AM PDT Thu Sep 11 2025
.TODAY...
* Sky/Weather............Partly cloudy in the morning, then partly
cloudy with a slight chance of showers in the afternoon.
* Max Temperature........80-85.
* 24 HR Trend..........Little change.
* Min Humidity...........44-51 percent.
* 24 HR Trend..........8 percent down.
* 20-Foot Winds..........Southwest winds up to 7 mph.
* CWR....................0 percent.
* Mixing Height..........6100 ft AGL.
* Chance of thunder......3 percent.
.TONIGHT...
* Sky/Weather............Mostly clear.
* Min Temperature........57-62.
* 24 HR Trend..........Little change.
* Max Humidity...........83-94 percent.
* 24 HR Trend..........6 percent down.
* 20-Foot Winds..........South winds up to 8 mph.
* CWR....................0 percent.
* Mixing Height..........500 ft AGL.
* Chance of thunder......1 percent.
.FRIDAY...
* Sky/Weather............Sunny.
* Max Temperature........86-91.
* Min Humidity...........33-48 percent.
* 20-Foot Winds..........Southwest winds up to 7 mph.
* Mixing Height..........5100 ft AGL.
* CWR....................0 percent.
* Chance of thunder......1 percent.
$$
CAZ218-120000-
Carquinez Strait and Delta-
1230 AM PDT Thu Sep 11 2025
.TODAY...
* Sky/Weather............Mostly sunny in the morning then becoming
partly cloudy.
* Max Temperature........78-83.
* 24 HR Trend..........Little change.
* Min Humidity...........48-55 percent.
* 24 HR Trend..........8 percent down.
* 20-Foot Winds..........Southwest winds 5 to 11 mph with local
gusts up to 20 mph.
* CWR....................0 percent.
* Mixing Height..........5100 ft AGL.
* Chance of thunder......0 percent.
.TONIGHT...
* Sky/Weather............Mostly clear.
* Min Temperature........58-63.
* 24 HR Trend..........Little change.
* Max Humidity...........88-93 percent.
* 24 HR Trend..........Little change.
* 20-Foot Winds..........Southwest winds 5 to 11 mph with local
gusts up to 20 mph.
* CWR....................0 percent.
* Mixing Height..........600 ft AGL.
* Chance of thunder......0 percent.
.FRIDAY...
* Sky/Weather............Sunny.
* Max Temperature........82-88.
* Min Humidity...........51-66 percent.
* 20-Foot Winds..........West winds 5 to 11 mph. Local gusts up to
20 mph in the morning.
* Mixing Height..........4100 ft AGL.
* CWR....................0 percent.
* Chance of thunder......0 percent.
$$
CAZ219-120000-
Northern San Joaquin Valley in San Joaquin and Stanislaus
Counties Below 1000 ft-
1230 AM PDT Thu Sep 11 2025
.TODAY...
* Sky/Weather............Mostly sunny.
* Max Temperature........78-83.
* 24 HR Trend..........Little change.
* Min Humidity...........48-54 percent.
* 24 HR Trend..........7 percent down.
* 20-Foot Winds..........West winds 5 to 11 mph. Local gusts up to
20 mph in the afternoon.
* CWR....................0 percent.
* Mixing Height..........5800 ft AGL.
* Chance of thunder......1 percent.
.TONIGHT...
* Sky/Weather............Mostly clear.
* Min Temperature........57-62.
* 24 HR Trend..........Little change.
* Max Humidity...........83-97 percent.
* 24 HR Trend..........4 percent down.
* 20-Foot Winds..........Northwest winds 6 to 12 mph.
* CWR....................0 percent.
* Mixing Height..........600 ft AGL.
* Chance of thunder......0 percent.
.FRIDAY...
* Sky/Weather............Sunny.
* Max Temperature........83-88.
* Min Humidity...........34-49 percent.
* 20-Foot Winds..........Northwest winds 5 to 11 mph.
* Mixing Height..........5000 ft AGL.
* CWR....................0 percent.
* Chance of thunder......0 percent.
$$
CAZ263-279-120000-
Southeast Edge Shasta-Trinity NF and Western Portions of Tehama-
Glenn Unit-Eastern Mendocino NF-
1230 AM PDT Thu Sep 11 2025
.TODAY...
* Sky/Weather............Partly cloudy. A chance of showers in the
afternoon.
* Max Temperature........77-82 lower elevations...except 61-71
higher elevations.
* 24 HR Trend..........5 degrees warmer.
* Min Humidity...........45-50 percent lower elevations...except
55-70 percent high elevations.
* 24 HR Trend..........12 percent down.
* 20-Foot Winds..........
* Valleys/Lwr Slopes...East winds up to 7 mph.
* Ridges/Upr Slopes....East winds up to 7 mph.
* CWR....................10 percent.
* Mixing Height..........4700 ft AGL.
* Chance of thunder......11 percent.
.TONIGHT...
* Sky/Weather............Mostly clear.
* Min Temperature........61-66 lower elevations...except 50-58
higher elevations.
* 24 HR Trend..........4 degrees warmer.
* Max Humidity...........66-79 percent.
* 24 HR Trend..........12 percent down.
* 20-Foot Winds..........
* Valleys/Lwr Slopes...Northwest winds 4 to 9 mph.
* Ridges/Upr Slopes....Northwest winds 4 to 9 mph.
* CWR....................0 percent.
* Mixing Height..........600 ft AGL.
* Chance of thunder......7 percent.
.FRIDAY...
* Sky/Weather............Sunny.
* Max Temperature........84-89 lower elevations...except 68-78
higher elevations.
* Min Humidity...........30-45 percent lower elevations...except
45-60 percent high elevations.
* 20-Foot Winds..........
* Valleys/Lwr Slopes...Northwest winds 4 to 9 mph shifting to the
northeast up to 7 mph in the afternoon.
* Ridges/Upr Slopes....Northwest winds 5 to 11 mph shifting to the
northeast up to 7 mph in the afternoon.
* Mixing Height..........5600 ft AGL.
* CWR....................0 percent.
* Chance of thunder......2 percent.
$$
CAZ266-120000-
Northern Sierra Foothills from 1000 to 3000 Ft. Includes portions
of Shasta-Trinity and Butte Units-
1230 AM PDT Thu Sep 11 2025
.TODAY...
* Sky/Weather............Mostly sunny. A chance of showers and a
slight chance of thunderstorms in the afternoon.
* Max Temperature........72-77.
* 24 HR Trend..........Little change.
* Min Humidity...........48-58 percent.
* 24 HR Trend..........12 percent down.
* 20-Foot Winds..........
* Valleys/Lwr Slopes...Southwest winds up to 7 mph in the morning
becoming upslope up to 5 mph.
* Ridges/Upr Slopes....Variable winds up to 7 mph.
* CWR....................10 percent.
* Mixing Height..........5500 ft AGL.
* Chance of thunder......14 percent.
.TONIGHT...
* Sky/Weather............Mostly clear.
* Min Temperature........55-63.
* 24 HR Trend..........Little change.
* Max Humidity...........68-83 percent.
* 24 HR Trend..........16 percent down.
* 20-Foot Winds..........
* Valleys/Lwr Slopes...Drainage winds up to 5 mph becoming
northeast 4 to 10 mph after midnight.
* Ridges/Upr Slopes....Variable winds up to 5 mph becoming
northeast up to 8 mph after midnight.
* CWR....................0 percent.
* Mixing Height..........500 ft AGL.
* Chance of thunder......8 percent.
.FRIDAY...
* Sky/Weather............Sunny.
* Max Temperature........81-86 lower elevations...except 76-82
higher elevations.
* Min Humidity...........37-52 percent.
* 20-Foot Winds..........
* Valleys/Lwr Slopes...Northeast winds 5 to 11 mph in the morning
becoming upslope up to 5 mph.
* Ridges/Upr Slopes....Northeast winds 4 to 9 mph in the morning
becoming variable up to 5 mph.
* Mixing Height..........5400 ft AGL.
* CWR....................0 percent.
* Chance of thunder......2 percent.
$$
CAZ220-267-120000-
Southern Motherlode From 1000 to 3000 Ft. Includes portions of
Toulumne-Calaveras Unit-
Northern Motherlode From 1000 to 3000 Ft. Includes portions of
Nevada-Yuba-Placer-Amador and Eldorado Units-
1230 AM PDT Thu Sep 11 2025
.TODAY...
* Sky/Weather............Mostly sunny. A slight chance of showers
in the afternoon.
* Max Temperature........73-78.
* 24 HR Trend..........Little change.
* Min Humidity...........49-58 percent.
* 24 HR Trend..........7 percent down.
* 20-Foot Winds..........
* Valleys/Lwr Slopes...Upslope winds up to 5 mph becoming west up
to 7 mph in the afternoon.
* Ridges/Upr Slopes....Variable winds up to 7 mph becoming west up
to 7 mph in the afternoon.
* CWR....................0 percent.
* Mixing Height..........5900 ft AGL.
* Chance of thunder......10 percent.
.TONIGHT...
* Sky/Weather............Mostly clear.
* Min Temperature........54-59.
* 24 HR Trend..........Little change.
* Max Humidity...........77-89 percent.
* 24 HR Trend..........11 percent down.
* 20-Foot Winds..........
* Valleys/Lwr Slopes...Northwest winds up to 7 mph in the evening
becoming drainage up to 5 mph.
* Ridges/Upr Slopes....Variable winds up to 5 mph.
* CWR....................0 percent.
* Mixing Height..........500 ft AGL.
* Chance of thunder......5 percent.
.FRIDAY...
* Sky/Weather............Sunny.
* Max Temperature........81-86 lower elevations...except 76-81
higher elevations.
* Min Humidity...........34-49 percent.
* 20-Foot Winds..........
* Valleys/Lwr Slopes...Upslope winds up to 5 mph becoming west up
to 8 mph in the afternoon.
* Ridges/Upr Slopes....Variable winds up to 7 mph becoming west up
to 8 mph in the afternoon.
* Mixing Height..........4900 ft AGL.
* CWR....................0 percent.
* Chance of thunder......3 percent.
$$
CAZ268-120000-
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 Sep 11 2025
.TODAY...
* Sky/Weather............Partly cloudy. A chance of showers and a
slight chance of thunderstorms in the afternoon.
* Max Temperature........63-71 lower elevations...except 56-64
higher elevations.
* 24 HR Trend..........4 degrees warmer.
* Min Humidity...........53-68 percent.
* 24 HR Trend..........9 percent down.
* 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 west
in the afternoon.
* CWR....................10 percent.
* Mixing Height..........4500 ft AGL.
* Chance of thunder......18 percent.
.TONIGHT...
* Sky/Weather............Partly cloudy. A slight chance of showers
in the evening.
* Min Temperature........42-52.
* 24 HR Trend..........Little change.
* Max Humidity...........81-96 percent...except 95-100 percent in
the high mountain valleys.
* 24 HR Trend..........5 percent down.
* 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....North winds up to 8 mph.
* CWR....................0 percent.
* Mixing Height..........300 ft AGL.
* Chance of thunder......12 percent.
.FRIDAY...
* Sky/Weather............Sunny.
* Max Temperature........70-76 lower elevations...except 63-71
higher elevations.
* Min Humidity...........40-55 percent.
* 20-Foot Winds..........
* Valleys/Lwr Slopes...Northeast winds 4 to 10 mph shifting to the
northwest up to 7 mph in the afternoon.
* Ridges/Upr Slopes....Northeast winds 4 to 10 mph shifting to the
northwest up to 7 mph in the afternoon.
* Mixing Height..........5800 ft AGL.
* CWR....................0 percent.
* Chance of thunder......6 percent.
$$
CAZ221-269-120000-
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 Sep 11 2025
.TODAY...
* 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........68-73 lower elevations...except 55-65
higher elevations.
* 24 HR Trend..........Little change.
* Min Humidity...........52-66 percent.
* 24 HR Trend..........7 percent down.
* 20-Foot Winds..........
* Valleys/Lwr Slopes...Upslope winds up to 5 mph becoming west up
to 7 mph in the afternoon.
* Ridges/Upr Slopes....Variable winds up to 7 mph becoming west up
to 8 mph in the afternoon.
* CWR....................10 percent.
* Mixing Height..........4600 ft AGL.
* Chance of thunder......16 percent.
.TONIGHT...
* Sky/Weather............Partly cloudy.
* Min Temperature........48-56 lower elevations...except 38-48
higher elevations.
* 24 HR Trend..........Little change.
* Max Humidity...........81-96 percent.
* 24 HR Trend..........8 percent down.
* 20-Foot Winds..........
* Valleys/Lwr Slopes...Drainage winds up to 5 mph becoming
northeast up to 7 mph after midnight.
* Ridges/Upr Slopes....Northeast winds 5 to 11 mph.
* CWR....................0 percent.
* Mixing Height..........400 ft AGL.
* Chance of thunder......10 percent.
.FRIDAY...
* Sky/Weather............Mostly sunny. At higher elevations, a
slight chance of showers early in the afternoon. A slight chance
of showers and thunderstorms late in the afternoon.
* Max Temperature........73-79 lower elevations...except 59-69
higher elevations.
* Min Humidity...........43-58 percent.
* 20-Foot Winds..........
* Valleys/Lwr Slopes...East winds up to 7 mph shifting to the west
up to 8 mph in the afternoon.
* Ridges/Upr Slopes....East winds 5 to 11 mph shifting to the west
up to 8 mph in the afternoon.
* Mixing Height..........5500 ft AGL.
* CWR....................0 percent.
* Chance of thunder......10 percent.
$$
.Extended...
...Shasta County Mountains and Coastal Range
.FRIDAY NIGHT...Clear. Lows 50 to 60. Northwest winds up to
10 mph.
.SATURDAY...Sunny. Highs 73 to 83. South winds up to 10 mph.
.SATURDAY NIGHT...Mostly clear. Lows 49 to 59. West winds 5 to
15 mph.
.SUNDAY...Mostly sunny. Highs 69 to 79. Variable less than 5 mph.
.SUNDAY NIGHT...Clear. Lows 47 to 57. Northwest winds up to
10 mph.
.MONDAY...Sunny. Highs 73 to 83. North winds up to 10 mph.
.MONDAY NIGHT...Clear. Lows 49 to 59. Northwest winds up to
10 mph.
...Northern Sierra and Lassen Park
.FRIDAY NIGHT...Clear. Lows 48 to 58. Northeast winds up to
10 mph.
.SATURDAY...Sunny. Highs 74 to 83. Southwest winds 5 to 15 mph.
.SATURDAY NIGHT...Clear. Lows 47 to 57. Southeast winds up to
10 mph.
.SUNDAY...Mostly sunny. Highs 70 to 80. Southwest winds up to
10 mph.
.SUNDAY NIGHT...Clear. Lows 46 to 56. Variable less than 5 mph.
.MONDAY...Sunny. Highs 75 to 84. Variable less than 5 mph.
.MONDAY NIGHT...Clear. Lows 48 to 58. Variable less than 5 mph.
...Sierra Nevada Foothills
.FRIDAY NIGHT...Clear. Lows 58 to 63. Northeast winds up to
10 mph.
.SATURDAY...Sunny. Highs 81 to 86. Southwest winds up to 10 mph.
.SATURDAY NIGHT...Clear. Lows 58 to 63. East winds up to 10 mph.
.SUNDAY...Sunny. Highs 78 to 84. Variable less than 5 mph.
.SUNDAY NIGHT...Clear. Lows 56 to 62. Variable less than 5 mph.
.MONDAY...Sunny. Highs 82 to 88. Variable less than 5 mph.
.MONDAY NIGHT...Clear. Lows 58 to 64. Variable less than 5 mph.
...Central Valley and Delta
.FRIDAY NIGHT...Clear. Lows 58 to 63. Southwest winds 5 to
15 mph.
.SATURDAY...Sunny. Highs 87 to 92. Southwest winds 5 to 15 mph.
.SATURDAY NIGHT...Clear. Lows 57 to 62. Southwest winds 5 to
15 mph.
.SUNDAY...Sunny. Highs 84 to 89. Southwest winds up to 10 mph.
.SUNDAY NIGHT...Clear. Lows 58 to 63. Variable less than 5 mph.
.MONDAY...Sunny. Highs 88 to 93. Northwest winds up to 10 mph.
.MONDAY NIGHT...Clear. Lows 59 to 64. Variable less than 5 mph.
$$