Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Sacramento, CA
Issued by NWS Sacramento, CA
578
FNUS56 KSTO 310730
FWFSTO
Fire Weather Planning Forecast for Interior Northern California
National Weather Service Sacramento CA
1230 AM PDT Sun Aug 31 2025
NOTE: THIS PRODUCT HAS UPDATED FORECAST DATA BUT THE FORECAST
DISCUSSION IS FROM THE PREVIOUS DAY.
...Hot with Low Humidity with Chance of Thunderstorms Tuesday and
Wednesday...
.DISCUSSION...High temperatures will trend hot for the weekend
into next week. Afternoon humidity levels will be low and generally
be in the teens to lower 20s, potentially dropping into the
single digits locally, with areas of poor overnight recovery in
the foothills and mountains. Winds will generally be diurnal and
terrain driven early week, with breezy onshore winds developing
mid week. Dry weather is expected through Monday, with chances of
mountain and foothill showers and thunderstorms Tuesday through
Wednesday.
CAZ213-010000-
Eastern Portion of Shasta-Trinity NF-
1230 AM PDT Sun Aug 31 2025
.TODAY...
* Sky/Weather............Mostly sunny. Patchy smoke in the morning.
* Max Temperature........94-99 lower elevations...except 84-93
higher elevations.
* 24 HR Trend..........Little change.
* Min Humidity...........11-16 percent.
* 24 HR Trend..........Little change.
* 20-Foot Winds..........
* Valleys/Lwr Slopes...North winds up to 8 mph shifting to the
south in the afternoon.
* Ridges/Upr Slopes....Northeast winds up to 8 mph shifting to the
south 4 to 10 mph with local gusts up to 20 mph in the
afternoon.
* CWR....................0 percent.
* Mixing Height..........7200 ft AGL.
* Chance of thunder......0 percent.
.TONIGHT...
* Sky/Weather............Mostly clear. Patchy smoke after midnight.
* Min Temperature........63-68 lower elevations...except 53-63
higher elevations.
* 24 HR Trend..........Little change.
* Max Humidity...........30-45 percent.
* 24 HR Trend..........Little change.
* 20-Foot Winds..........
* Valleys/Lwr Slopes...Southwest winds up to 7 mph shifting to the
north after midnight.
* Ridges/Upr Slopes....Southwest winds up to 8 mph shifting to the
northeast after midnight.
* CWR....................0 percent.
* Mixing Height..........700 ft AGL.
* Chance of thunder......0 percent.
.LABOR DAY...
* Sky/Weather............Sunny.
* Max Temperature........95-100 lower elevations...except 84-94
higher elevations.
* Min Humidity...........11-20 percent.
* 20-Foot Winds..........
* Valleys/Lwr Slopes...North winds up to 7 mph shifting to the
south up to 8 mph in the afternoon.
* Ridges/Upr Slopes....Northeast winds up to 8 mph shifting to the
south with local gusts up to 20 mph in the afternoon.
* Mixing Height..........7100 ft AGL.
* CWR....................0 percent.
* Chance of thunder......0 percent.
$$
CAZ214-010000-
Burney Basin and Northeast Plateau in Shasta County Including
Northwest Lassen NF north of Lassen NP-
1230 AM PDT Sun Aug 31 2025
.TODAY...
* Sky/Weather............Mostly sunny.
* Max Temperature........89-94 lower elevations...except 83-88
higher elevations.
* 24 HR Trend..........Little change.
* Min Humidity...........12-17 percent.
* 24 HR Trend..........Little change.
* 20-Foot Winds..........
* Valleys/Lwr Slopes...Upslope winds up to 5 mph becoming west 4 to
10 mph with local gusts up to 25 mph in the afternoon.
* Ridges/Upr Slopes....Variable winds up to 7 mph becoming
southwest 5 to 11 mph with local gusts up to 25 mph in the
afternoon.
* CWR....................0 percent.
* Mixing Height..........9000 ft AGL.
* Chance of thunder......0 percent.
.TONIGHT...
* Sky/Weather............Mostly clear.
* Min Temperature........49-55.
* 24 HR Trend..........Little change.
* Max Humidity...........39-50 percent.
* 24 HR Trend..........Little change.
* 20-Foot Winds..........
* Valleys/Lwr Slopes...Southwest winds up to 8 mph with local gusts
up to 20 mph in the evening becoming drainage up to 5 mph.
* Ridges/Upr Slopes....South winds up to 8 mph.
* CWR....................0 percent.
* Mixing Height..........700 ft AGL.
* Chance of thunder......0 percent.
.LABOR DAY...
* Sky/Weather............Sunny.
* Max Temperature........90-95 lower elevations...except 83-89
higher elevations.
* Min Humidity...........15-22 percent.
* 20-Foot Winds..........
* Valleys/Lwr Slopes...Upslope winds up to 5 mph becoming southwest
4 to 9 mph with local gusts up to 20 mph in the afternoon.
* Ridges/Upr Slopes....South winds up to 8 mph.
* Mixing Height..........10100 ft AGL.
* CWR....................0 percent.
* Chance of thunder......0 percent.
$$
CAZ215-010000-
Northern Sacramento Valley to Southern Tehama County Line Below
1000 Ft-
1230 AM PDT Sun Aug 31 2025
.TODAY...
* Sky/Weather............Mostly sunny. Patchy smoke in the morning.
* Max Temperature........97-102.
* 24 HR Trend..........Little change.
* Min Humidity...........11-16 percent.
* 24 HR Trend..........Little change.
* 20-Foot Winds..........North winds up to 8 mph shifting to the
south 4 to 9 mph with local gusts up to 20 mph in the afternoon.
* CWR....................0 percent.
* Mixing Height..........7200 ft AGL.
* Chance of thunder......0 percent.
.TONIGHT...
* Sky/Weather............Mostly clear.
* Min Temperature........63-68.
* 24 HR Trend..........Little change.
* Max Humidity...........37-47 percent.
* 24 HR Trend..........Little change.
* 20-Foot Winds..........South winds 4 to 9 mph shifting to the
north up to 7 mph after midnight.
* CWR....................0 percent.
* Mixing Height..........600 ft AGL.
* Chance of thunder......0 percent.
.LABOR DAY...
* Sky/Weather............Sunny.
* Max Temperature........99-104.
* Min Humidity...........11-22 percent.
* 20-Foot Winds..........North winds up to 8 mph shifting to the
south in the afternoon.
* Mixing Height..........6600 ft AGL.
* CWR....................0 percent.
* Chance of thunder......0 percent.
$$
CAZ216-010000-
Central Sacramento Valley in Glenn, Colusa, Yuba, Northern
Sutter, and Butte County Below 1000 Ft-
1230 AM PDT Sun Aug 31 2025
.TODAY...
* Sky/Weather............Mostly sunny.
* Max Temperature........96-101.
* 24 HR Trend..........Little change.
* Min Humidity...........15-22 percent.
* 24 HR Trend..........5 percent down.
* 20-Foot Winds..........Northwest winds up to 8 mph shifting to
the south 4 to 9 mph with local gusts up to 20 mph in the
afternoon.
* CWR....................0 percent.
* Mixing Height..........5500 ft AGL.
* Chance of thunder......0 percent.
.TONIGHT...
* Sky/Weather............Mostly clear.
* Min Temperature........61-68.
* 24 HR Trend..........Little change.
* Max Humidity...........45-60 percent.
* 24 HR Trend..........5 percent up.
* 20-Foot Winds..........South winds up to 8 mph.
* CWR....................0 percent.
* Mixing Height..........500 ft AGL.
* Chance of thunder......0 percent.
.LABOR DAY...
* Sky/Weather............Sunny.
* Max Temperature........97-102.
* Min Humidity...........13-28 percent.
* 20-Foot Winds..........North winds up to 8 mph shifting to the
south in the afternoon.
* Mixing Height..........4900 ft AGL.
* CWR....................0 percent.
* Chance of thunder......0 percent.
$$
CAZ217-010000-
Southern Sacramento Valley in Yolo-
Sacramento Far Western Placer, southern Sutter and Solano County
Below 1000 Ft-
1230 AM PDT Sun Aug 31 2025
.TODAY...
* Sky/Weather............Mostly sunny.
* Max Temperature........99-104.
* 24 HR Trend..........Little change.
* Min Humidity...........12-17 percent.
* 24 HR Trend..........4 percent down.
* 20-Foot Winds..........Southwest winds 4 to 9 mph. Local gusts up
to 20 mph in the afternoon.
* CWR....................0 percent.
* Mixing Height..........6500 ft AGL.
* Chance of thunder......0 percent.
.TONIGHT...
* Sky/Weather............Clear.
* Min Temperature........60-68.
* 24 HR Trend..........Little change.
* Max Humidity...........51-66 percent.
* 24 HR Trend..........11 percent up.
* 20-Foot Winds..........South winds up to 8 mph. Local gusts up to
20 mph in the evening.
* CWR....................0 percent.
* Mixing Height..........500 ft AGL.
* Chance of thunder......0 percent.
.LABOR DAY...
* Sky/Weather............Sunny.
* Max Temperature........99-104.
* Min Humidity...........13-25 percent.
* 20-Foot Winds..........Southwest winds up to 8 mph.
* Mixing Height..........4400 ft AGL.
* CWR....................0 percent.
* Chance of thunder......0 percent.
$$
CAZ218-010000-
Carquinez Strait and Delta-
1230 AM PDT Sun Aug 31 2025
.TODAY...
* Sky/Weather............Mostly sunny.
* Max Temperature........95-100.
* 24 HR Trend..........Little change.
* Min Humidity...........18-23 percent.
* 24 HR Trend..........Little change.
* 20-Foot Winds..........West winds 7 to 13 mph with local gusts up
to 25 mph.
* CWR....................0 percent.
* Mixing Height..........4000 ft AGL.
* Chance of thunder......0 percent.
.TONIGHT...
* Sky/Weather............Clear.
* Min Temperature........60-65.
* 24 HR Trend..........Little change.
* Max Humidity...........65-79 percent.
* 24 HR Trend..........14 percent up.
* 20-Foot Winds..........West winds 6 to 12 mph with local gusts up
to 20 mph.
* CWR....................0 percent.
* Mixing Height..........500 ft AGL.
* Chance of thunder......0 percent.
.LABOR DAY...
* Sky/Weather............Sunny.
* Max Temperature........92-100.
* Min Humidity...........28-43 percent.
* 20-Foot Winds..........West winds 5 to 11 mph. Local gusts up to
20 mph in the morning.
* Mixing Height..........2500 ft AGL.
* CWR....................0 percent.
* Chance of thunder......0 percent.
$$
CAZ219-010000-
Northern San Joaquin Valley in San Joaquin and Stanislaus
Counties Below 1000 ft-
1230 AM PDT Sun Aug 31 2025
.TODAY...
* Sky/Weather............Sunny.
* Max Temperature........99-104.
* 24 HR Trend..........Little change.
* Min Humidity...........13-18 percent.
* 24 HR Trend..........4 percent down.
* 20-Foot Winds..........Northwest winds 8 to 14 mph. Local gusts
up to 25 mph in the afternoon.
* CWR....................0 percent.
* Mixing Height..........6500 ft AGL.
* Chance of thunder......0 percent.
.TONIGHT...
* Sky/Weather............Clear.
* Min Temperature........64-71.
* 24 HR Trend..........Little change.
* Max Humidity...........42-57 percent.
* 24 HR Trend..........7 percent up.
* 20-Foot Winds..........Northwest winds 7 to 13 mph.
* CWR....................0 percent.
* Mixing Height..........500 ft AGL.
* Chance of thunder......0 percent.
.LABOR DAY...
* Sky/Weather............Sunny.
* Max Temperature........98-103.
* Min Humidity...........13-24 percent.
* 20-Foot Winds..........Northwest winds 4 to 10 mph.
* Mixing Height..........4200 ft AGL.
* CWR....................0 percent.
* Chance of thunder......0 percent.
$$
CAZ263-279-010000-
Southeast Edge Shasta-Trinity NF and Western Portions of Tehama-
Glenn Unit-Eastern Mendocino NF-
1230 AM PDT Sun Aug 31 2025
.TODAY...
* Sky/Weather............Mostly sunny. Patchy smoke in the morning.
* Max Temperature........94-99 lower elevations...except 79-89
higher elevations.
* 24 HR Trend..........Little change.
* Min Humidity...........14-19 percent.
* 24 HR Trend..........Little change.
* 20-Foot Winds..........
* Valleys/Lwr Slopes...North winds 4 to 10 mph shifting to the
southeast 4 to 9 mph in the afternoon.
* Ridges/Upr Slopes....Southeast winds 5 to 11 mph.
* CWR....................0 percent.
* Mixing Height..........6900 ft AGL.
* Chance of thunder......0 percent.
.TONIGHT...
* Sky/Weather............Mostly clear.
* Min Temperature........68-73 lower elevations...except 60-67
higher elevations.
* 24 HR Trend..........Little change.
* Max Humidity...........29-38 percent.
* 24 HR Trend..........4 percent up.
* 20-Foot Winds..........
* Valleys/Lwr Slopes...West winds 4 to 10 mph.
* Ridges/Upr Slopes....West winds 4 to 10 mph.
* CWR....................0 percent.
* Mixing Height..........600 ft AGL.
* Chance of thunder......0 percent.
.LABOR DAY...
* Sky/Weather............Sunny.
* Max Temperature........96-101 lower elevations...except 79-89
higher elevations.
* Min Humidity...........13-26 percent.
* 20-Foot Winds..........
* Valleys/Lwr Slopes...Northwest winds 4 to 9 mph shifting to the
east with local gusts up to 20 mph in the afternoon.
* Ridges/Upr Slopes....West winds 4 to 9 mph shifting to the
southeast 5 to 11 mph in the afternoon.
* Mixing Height..........6900 ft AGL.
* CWR....................0 percent.
* Chance of thunder......0 percent.
$$
CAZ266-010000-
Northern Sierra Foothills from 1000 to 3000 Ft. Includes portions
of Shasta-Trinity and Butte Units-
1230 AM PDT Sun Aug 31 2025
.TODAY...
* Sky/Weather............Mostly sunny.
* Max Temperature........93-98 lower elevations...except 88-94
higher elevations.
* 24 HR Trend..........Little change.
* Min Humidity...........11-16 percent.
* 24 HR Trend..........Little change.
* 20-Foot Winds..........
* Valleys/Lwr Slopes...South winds 6 to 12 mph.
* Ridges/Upr Slopes....South winds 6 to 12 mph.
* CWR....................0 percent.
* Mixing Height..........6800 ft AGL.
* Chance of thunder......0 percent.
.TONIGHT...
* Sky/Weather............Mostly clear.
* Min Temperature........65-73.
* 24 HR Trend..........Little change.
* Max Humidity...........25-33 percent.
* 24 HR Trend..........Little change.
* 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.
.LABOR DAY...
* Sky/Weather............Sunny.
* Max Temperature........94-99 lower elevations...except 89-95
higher elevations.
* Min Humidity...........13-25 percent.
* 20-Foot Winds..........
* Valleys/Lwr Slopes...East winds 6 to 12 mph shifting to the
southwest up to 8 mph with local gusts up to 20 mph in the
afternoon.
* Ridges/Upr Slopes....East winds 5 to 11 mph shifting to the
southwest up to 8 mph with local gusts up to 20 mph in the
afternoon.
* Mixing Height..........8400 ft AGL.
* CWR....................0 percent.
* Chance of thunder......0 percent.
$$
CAZ220-267-010000-
Southern Motherlode From 1000 to 3000 Ft. Includes portions of
Toulumne-Calaveras Unit-
Northern Motherlode From 1000 to 3000 Ft. Includes portions of
Nevada-Yuba-Placer-Amador and Eldorado Units-
1230 AM PDT Sun Aug 31 2025
.TODAY...
* Sky/Weather............Sunny.
* Max Temperature........93-98.
* 24 HR Trend..........Little change.
* Min Humidity...........13-18 percent.
* 24 HR Trend..........Little change.
* 20-Foot Winds..........
* Valleys/Lwr Slopes...Northeast winds up to 8 mph shifting to the
west 4 to 10 mph with local gusts up to 20 mph in the
afternoon.
* Ridges/Upr Slopes....Northeast winds up to 8 mph shifting to the
west 4 to 9 mph in the afternoon.
* CWR....................0 percent.
* Mixing Height..........7600 ft AGL.
* Chance of thunder......0 percent.
.TONIGHT...
* Sky/Weather............Mostly clear.
* Min Temperature........67-72.
* 24 HR Trend..........Little change.
* Max Humidity...........33-39 percent.
* 24 HR Trend..........Little change.
* 20-Foot Winds..........
* Valleys/Lwr Slopes...Northwest winds up to 8 mph shifting to the
northeast after midnight.
* Ridges/Upr Slopes....Northeast winds up to 8 mph.
* CWR....................0 percent.
* Mixing Height..........500 ft AGL.
* Chance of thunder......0 percent.
.LABOR DAY...
* Sky/Weather............Sunny.
* Max Temperature........98-103 lower elevations...except 93-98
higher elevations.
* Min Humidity...........12-22 percent.
* 20-Foot Winds..........
* Valleys/Lwr Slopes...East winds up to 8 mph shifting to the west
up to 7 mph in the afternoon.
* Ridges/Upr Slopes....East winds up to 8 mph shifting to the
southwest in the afternoon.
* Mixing Height..........8200 ft AGL.
* CWR....................0 percent.
* Chance of thunder......0 percent.
$$
CAZ268-010000-
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 Sun Aug 31 2025
.TODAY...
* Sky/Weather............Mostly sunny.
* Max Temperature........82-89 lower elevations...except 75-82
higher elevations.
* 24 HR Trend..........Little change.
* Min Humidity...........15-21 percent.
* 24 HR Trend..........Little change.
* 20-Foot Winds..........
* Valleys/Lwr Slopes...South winds 5 to 11 mph.
* Ridges/Upr Slopes....South winds 5 to 11 mph.
* CWR....................0 percent.
* Mixing Height..........7300 ft AGL.
* Chance of thunder......0 percent.
.TONIGHT...
* Sky/Weather............Mostly clear.
* Min Temperature........53-63.
* 24 HR Trend..........Little change.
* Max Humidity...........29-44 percent...except 48-63 percent in
the high mountain valleys.
* 24 HR Trend..........4 percent down.
* 20-Foot Winds..........
* Valleys/Lwr Slopes...Southeast winds 4 to 10 mph.
* Ridges/Upr Slopes....Southeast winds 5 to 11 mph.
* CWR....................0 percent.
* Mixing Height..........300 ft AGL.
* Chance of thunder......0 percent.
.LABOR DAY...
* Sky/Weather............Sunny.
* Max Temperature........83-89 lower elevations...except 75-83
higher elevations.
* Min Humidity...........14-29 percent.
* 20-Foot Winds..........
* Valleys/Lwr Slopes...East winds 4 to 10 mph shifting to the
southwest 4 to 9 mph with local gusts up to 20 mph in the
afternoon.
* Ridges/Upr Slopes....South winds 6 to 12 mph.
* Mixing Height..........9000 ft AGL.
* CWR....................0 percent.
* Chance of thunder......0 percent.
$$
CAZ221-269-010000-
Stanislaus NF West of the Sierra Crest-
Northern Sierra Including the Tahoe and Eldorado NF/S West of the
Sierra Crest-
1230 AM PDT Sun Aug 31 2025
.TODAY...
* Sky/Weather............Mostly sunny.
* Max Temperature........88-93 lower elevations...except 74-84
higher elevations.
* 24 HR Trend..........Little change.
* Min Humidity...........17-27 percent.
* 24 HR Trend..........Little change.
* 20-Foot Winds..........
* Valleys/Lwr Slopes...East winds up to 8 mph shifting to the west
4 to 9 mph in the afternoon.
* Ridges/Upr Slopes....South winds 4 to 9 mph. Local gusts up to 20
mph in the afternoon.
* CWR....................0 percent.
* Mixing Height..........7900 ft AGL.
* Chance of thunder......0 percent.
.TONIGHT...
* Sky/Weather............Mostly clear. Patchy smoke after midnight.
* Min Temperature........61-70 lower elevations...except 50-60
higher elevations.
* 24 HR Trend..........Little change.
* Max Humidity...........36-51 percent.
* 24 HR Trend..........Little change.
* 20-Foot Winds..........
* Valleys/Lwr Slopes...Northeast winds up to 8 mph.
* Ridges/Upr Slopes....West winds up to 8 mph shifting to the
southeast after midnight.
* CWR....................0 percent.
* Mixing Height..........300 ft AGL.
* Chance of thunder......0 percent.
.LABOR DAY...
* Sky/Weather............Sunny.
* Max Temperature........89-95 lower elevations...except 74-84
higher elevations.
* Min Humidity...........16-31 percent.
* 20-Foot Winds..........
* Valleys/Lwr Slopes...East winds up to 8 mph shifting to the
southwest in the afternoon.
* Ridges/Upr Slopes....Southeast winds 4 to 9 mph shifting to the
southwest in the afternoon.
* Mixing Height..........9700 ft AGL.
* CWR....................0 percent.
* Chance of thunder......0 percent.
$$
.Extended...
...Shasta County Mountains and Coastal Range
.MONDAY NIGHT...Clear. Lows 58 to 68. Northwest winds 5 to
15 mph.
.TUESDAY...Mostly sunny. Highs 85 to 95. East winds up to 10 mph.
.TUESDAY NIGHT...Mostly clear. Lows 56 to 66. North winds up to
10 mph.
.WEDNESDAY...Mostly sunny. Highs 82 to 92. East winds up to
10 mph.
.WEDNESDAY NIGHT...Mostly clear. Lows 57 to 67. Variable less
than 5 mph.
.THURSDAY...Mostly sunny. Highs 82 to 92. Southeast winds up to
10 mph.
.THURSDAY NIGHT...Partly cloudy. Lows 57 to 67. Variable less
than 5 mph.
...Northern Sierra and Lassen Park
.MONDAY NIGHT...Clear. Lows 58 to 68. Northeast winds up to
10 mph.
.TUESDAY...Partly cloudy. Highs 85 to 93. South winds 5 to
15 mph.
.TUESDAY NIGHT...Partly cloudy with a slight chance of showers.
Lows 56 to 66. East winds 5 to 15 mph.
.WEDNESDAY...Mostly sunny. Highs 82 to 92. South winds up to
10 mph.
.WEDNESDAY NIGHT...Mostly clear. Lows 56 to 66. Variable less
than 5 mph.
.THURSDAY...Mostly sunny. Highs 83 to 92. Southwest winds up to
10 mph.
.THURSDAY NIGHT...Partly cloudy. Lows 56 to 66. Variable less
than 5 mph.
...Sierra Nevada Foothills
.MONDAY NIGHT...Clear. Lows 68 to 73. Northeast winds up to
10 mph.
.TUESDAY...Mostly sunny. Highs 92 to 97. South winds 5 to 15 mph.
.TUESDAY NIGHT...Mostly clear. Lows 65 to 70. East winds up to
10 mph.
.WEDNESDAY...Mostly sunny. Highs 90 to 95. Variable less than
5 mph.
.WEDNESDAY NIGHT...Mostly clear. Lows 65 to 71. Variable less
than 5 mph.
.THURSDAY...Mostly sunny. Highs 90 to 95. Variable less than
5 mph.
.THURSDAY NIGHT...Mostly clear. Lows 64 to 70. Variable less than
5 mph.
...Central Valley and Delta
.MONDAY NIGHT...Clear. Lows 63 to 68. West winds 5 to 15 mph.
.TUESDAY...Mostly sunny. Highs 96 to 101. Southwest winds 5 to
15 mph.
.TUESDAY NIGHT...Mostly clear. Lows 60 to 65. Southwest winds
5 to 15 mph.
.WEDNESDAY...Mostly sunny. Highs 93 to 98. Southwest winds up to
10 mph.
.WEDNESDAY NIGHT...Mostly clear. Lows 59 to 65. Southwest winds
up to 10 mph.
.THURSDAY...Mostly sunny. Highs 93 to 98. West winds up to
10 mph.
.THURSDAY NIGHT...Mostly clear. Lows 58 to 64. Southwest winds up
to 10 mph.
$$