193
FNUS56 KSTO 010730
FWFSTO

Fire Weather Planning Forecast for Interior Northern California
National Weather Service Sacramento CA
1230 AM PDT Mon Sep 1 2025

NOTE: THIS PRODUCT HAS UPDATED FORECAST DATA BUT THE FORECAST
DISCUSSION IS FROM THE PREVIOUS DAY.


...Hot with Low Humidity with Chances of Thunderstorms Tuesday
and Wednesday...

.DISCUSSION...DISCUSSION...High temperatures will be hot early
this week, trending cooler mid to late 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 quick-moving mountain and foothill
showers and thunderstorms Tuesday into Wednesday, with highest
potential Tuesday.


CAZ213-020000-
Eastern Portion of Shasta-Trinity NF-
1230 AM PDT Mon Sep 1 2025

.TODAY...
* Sky/Weather............Sunny. Patchy smoke in the morning.
* Max Temperature........95-100 lower elevations...except 84-94
  higher elevations.
*   24 HR Trend..........Little change.
* Min Humidity...........12-17 percent.
*   24 HR Trend..........Little change.
* 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 4 to 10 mph with 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............Clear. Patchy smoke after midnight.
* Min Temperature........67-73 lower elevations...except 57-67
  higher elevations.
*   24 HR Trend..........4 degrees warmer.
* Max Humidity...........34-49 percent.
*   24 HR Trend..........Little change.
* 20-Foot Winds..........
*   Valleys/Lwr Slopes...Northwest winds up to 7 mph.
*   Ridges/Upr Slopes....North winds up to 8 mph.
* CWR....................0 percent.
* Mixing Height..........700 ft AGL.
* Chance of thunder......0 percent.

.TUESDAY...
* Sky/Weather............Mostly sunny.
* Max Temperature........96-101 lower elevations...except 86-96
  higher elevations.
* Min Humidity...........16-30 percent.
* 20-Foot Winds..........
*   Valleys/Lwr Slopes...North winds up to 8 mph shifting to the
    south up to 7 mph in the afternoon.
*   Ridges/Upr Slopes....Northeast winds 4 to 9 mph shifting to the
    southeast up to 8 mph in the afternoon.
* Mixing Height..........9400 ft AGL.
* CWR....................0 percent.
* Chance of thunder......2 percent.


$$

CAZ214-020000-
Burney Basin and Northeast Plateau in Shasta County Including
Northwest Lassen NF north of Lassen NP-
1230 AM PDT Mon Sep 1 2025

.TODAY...
* Sky/Weather............Mostly sunny.
* Max Temperature........89-94 lower elevations...except 84-89
  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 7 mph shifting to the
    southwest 6 to 12 mph with local gusts up to 25 mph in the
    afternoon.
*   Ridges/Upr Slopes....South winds 5 to 11 mph. Local gusts up to
    25 mph in the afternoon.
* CWR....................0 percent.
* Mixing Height..........9800 ft AGL.
* Chance of thunder......0 percent.

.TONIGHT...
* Sky/Weather............Clear.
* Min Temperature........52-59.
*   24 HR Trend..........4 degrees warmer.
* Max Humidity...........46-59 percent.
*   24 HR Trend..........6 percent up.
* 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.

.TUESDAY...
* Sky/Weather............Mostly sunny until late afternoon then
  becoming mostly cloudy.
* Max Temperature........91-96 lower elevations...except 83-89
  higher elevations.
* Min Humidity...........21-32 percent.
* 20-Foot Winds..........
*   Valleys/Lwr Slopes...Upslope winds up to 5 mph becoming south up
    to 7 mph in the afternoon.
*   Ridges/Upr Slopes....Variable winds up to 7 mph becoming
    southeast up to 7 mph in the afternoon.
* Mixing Height..........10800 ft AGL.
* CWR....................0 percent.
* Chance of thunder......3 percent.


$$

CAZ215-020000-
Northern Sacramento Valley to Southern Tehama County Line Below
1000 Ft-
1230 AM PDT Mon Sep 1 2025

.TODAY...
* Sky/Weather............Mostly sunny.
* Max Temperature........99-104.
*   24 HR Trend..........Little change.
* Min Humidity...........12-17 percent.
*   24 HR Trend..........5 percent up.
* 20-Foot Winds..........North winds up to 7 mph shifting to the
  south 5 to 11 mph with local gusts up to 20 mph in the afternoon.
* CWR....................0 percent.
* Mixing Height..........8800 ft AGL.
* Chance of thunder......0 percent.

.TONIGHT...
* Sky/Weather............Clear.
* Min Temperature........67-73.
*   24 HR Trend..........5 degrees warmer.
* Max Humidity...........36-46 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.

.TUESDAY...
* Sky/Weather............Mostly sunny.
* Max Temperature........97-102.
* Min Humidity...........17-31 percent.
* 20-Foot Winds..........North winds up to 8 mph shifting to the
  south 4 to 9 mph in the afternoon.
* Mixing Height..........6800 ft AGL.
* CWR....................0 percent.
* Chance of thunder......2 percent.


$$

CAZ216-020000-
Central Sacramento Valley in Glenn, Colusa, Yuba, Northern
Sutter, and Butte County Below 1000 Ft-
1230 AM PDT Mon Sep 1 2025

.TODAY...
* Sky/Weather............Mostly sunny.
* Max Temperature........98-103.
*   24 HR Trend..........Little change.
* Min Humidity...........17-24 percent.
*   24 HR Trend..........11 percent up.
* 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..........5400 ft AGL.
* Chance of thunder......0 percent.

.TONIGHT...
* Sky/Weather............Clear.
* Min Temperature........65-72.
*   24 HR Trend..........4 degrees warmer.
* Max Humidity...........42-57 percent.
*   24 HR Trend..........Little change.
* 20-Foot Winds..........South winds up to 8 mph.
* CWR....................0 percent.
* Mixing Height..........500 ft AGL.
* Chance of thunder......0 percent.

.TUESDAY...
* Sky/Weather............Mostly sunny.
* Max Temperature........95-100.
* Min Humidity...........22-37 percent.
* 20-Foot Winds..........Southeast winds up to 8 mph.
* Mixing Height..........4200 ft AGL.
* CWR....................0 percent.
* Chance of thunder......4 percent.


$$

CAZ217-020000-
Southern Sacramento Valley in Yolo-
Sacramento Far Western Placer, southern Sutter and Solano County
Below 1000 Ft-
1230 AM PDT Mon Sep 1 2025

.TODAY...
* Sky/Weather............Sunny.
* Max Temperature........100-105.
*   24 HR Trend..........Little change.
* Min Humidity...........14-19 percent.
*   24 HR Trend..........7 percent up.
* 20-Foot Winds..........West winds up to 8 mph.
* CWR....................0 percent.
* Mixing Height..........5700 ft AGL.
* Chance of thunder......0 percent.

.TONIGHT...
* Sky/Weather............Clear.
* Min Temperature........63-70.
*   24 HR Trend..........Little change.
* Max Humidity...........49-64 percent.
*   24 HR Trend..........Little change.
* 20-Foot Winds..........South winds up to 8 mph.
* CWR....................0 percent.
* Mixing Height..........400 ft AGL.
* Chance of thunder......0 percent.

.TUESDAY...
* Sky/Weather............Mostly sunny.
* Max Temperature........95-100.
* Min Humidity...........21-36 percent.
* 20-Foot Winds..........South winds 4 to 9 mph.
* Mixing Height..........3900 ft AGL.
* CWR....................0 percent.
* Chance of thunder......3 percent.


$$

CAZ218-020000-
Carquinez Strait and Delta-
1230 AM PDT Mon Sep 1 2025

.TODAY...
* Sky/Weather............Sunny.
* Max Temperature........96-101.
*   24 HR Trend..........Little change.
* Min Humidity...........19-25 percent.
*   24 HR Trend..........5 percent up.
* 20-Foot Winds..........West winds 6 to 12 mph with local gusts up
  to 20 mph.
* CWR....................0 percent.
* Mixing Height..........3400 ft AGL.
* Chance of thunder......0 percent.

.TONIGHT...
* Sky/Weather............Clear.
* Min Temperature........61-66.
*   24 HR Trend..........Little change.
* Max Humidity...........65-80 percent.
*   24 HR Trend..........Little change.
* 20-Foot Winds..........West winds 6 to 12 mph with local gusts up
  to 25 mph.
* CWR....................0 percent.
* Mixing Height..........400 ft AGL.
* Chance of thunder......0 percent.

.TUESDAY...
* Sky/Weather............Mostly sunny.
* Max Temperature........86-96.
* Min Humidity...........45-60 percent.
* 20-Foot Winds..........West winds 6 to 12 mph with local gusts up
  to 20 mph.
* Mixing Height..........2000 ft AGL.
* CWR....................0 percent.
* Chance of thunder......2 percent.


$$

CAZ219-020000-
Northern San Joaquin Valley in San Joaquin and Stanislaus
Counties Below 1000 ft-
1230 AM PDT Mon Sep 1 2025

.TODAY...
* Sky/Weather............Sunny.
* Max Temperature........100-105.
*   24 HR Trend..........Little change.
* Min Humidity...........15-20 percent.
*   24 HR Trend..........6 percent up.
* 20-Foot Winds..........Northwest winds 5 to 11 mph.
* CWR....................0 percent.
* Mixing Height..........5300 ft AGL.
* Chance of thunder......0 percent.

.TONIGHT...
* Sky/Weather............Mostly clear.
* Min Temperature........66-72.
*   24 HR Trend..........Little change.
* Max Humidity...........42-57 percent.
*   24 HR Trend..........Little change.
* 20-Foot Winds..........Northwest winds 6 to 12 mph.
* CWR....................0 percent.
* Mixing Height..........500 ft AGL.
* Chance of thunder......0 percent.

.TUESDAY...
* Sky/Weather............Mostly sunny.
* Max Temperature........95-100.
* Min Humidity...........19-34 percent.
* 20-Foot Winds..........North winds 4 to 10 mph shifting to the
  south 4 to 9 mph in the afternoon.
* Mixing Height..........4400 ft AGL.
* CWR....................0 percent.
* Chance of thunder......3 percent.


$$

CAZ263-279-020000-
Southeast Edge Shasta-Trinity NF and Western Portions of Tehama-
Glenn Unit-Eastern Mendocino NF-
1230 AM PDT Mon Sep 1 2025

.TODAY...
* Sky/Weather............Mostly sunny.
* Max Temperature........95-100 lower elevations...except 80-90
  higher elevations.
*   24 HR Trend..........Little change.
* Min Humidity...........14-19 percent.
*   24 HR Trend..........Little change.
* 20-Foot Winds..........
*   Valleys/Lwr Slopes...South winds 4 to 10 mph with local gusts up
    to 20 mph.
*   Ridges/Upr Slopes....South winds 4 to 10 mph.
* CWR....................0 percent.
* Mixing Height..........8400 ft AGL.
* Chance of thunder......0 percent.

.TONIGHT...
* Sky/Weather............Clear.
* Min Temperature........72-77 lower elevations...except 64-72
  higher elevations.
*   24 HR Trend..........5 degrees warmer.
* Max Humidity...........28-33 percent.
*   24 HR Trend..........Little change.
* 20-Foot Winds..........
*   Valleys/Lwr Slopes...West winds 4 to 9 mph.
*   Ridges/Upr Slopes....West winds 4 to 9 mph.
* CWR....................0 percent.
* Mixing Height..........600 ft AGL.
* Chance of thunder......0 percent.

.TUESDAY...
* Sky/Weather............Mostly sunny.
* Max Temperature........95-100 lower elevations...except 79-89
  higher elevations.
* Min Humidity...........19-34 percent.
* 20-Foot Winds..........
*   Valleys/Lwr Slopes...Northwest winds up to 8 mph shifting to the
    southeast 4 to 9 mph with local gusts up to 20 mph in the
    afternoon.
*   Ridges/Upr Slopes....Northwest winds 4 to 9 mph shifting to the
    southeast 6 to 12 mph in the afternoon.
* Mixing Height..........8100 ft AGL.
* CWR....................0 percent.
* Chance of thunder......5 percent.


$$

CAZ266-020000-
Northern Sierra Foothills from 1000 to 3000 Ft. Includes portions
of Shasta-Trinity and Butte Units-
1230 AM PDT Mon Sep 1 2025

.TODAY...
* Sky/Weather............Mostly sunny.
* Max Temperature........95-100 lower elevations...except 90-95
  higher elevations.
*   24 HR Trend..........Little change.
* Min Humidity...........15-20 percent.
*   24 HR Trend..........6 percent up.
* 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..........9000 ft AGL.
* Chance of thunder......0 percent.

.TONIGHT...
* Sky/Weather............Clear.
* Min Temperature........69-76.
*   24 HR Trend..........Little change.
* Max Humidity...........30-39 percent.
*   24 HR Trend..........5 percent up.
* 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............Mostly sunny until late afternoon then
  becoming partly cloudy.
* Max Temperature........93-98 lower elevations...except 88-94
  higher elevations.
* Min Humidity...........21-35 percent.
* 20-Foot Winds..........
*   Valleys/Lwr Slopes...East winds 7 to 13 mph shifting to the
    southwest up to 8 mph in the afternoon.
*   Ridges/Upr Slopes....East winds 5 to 11 mph shifting to the south
    up to 8 mph in the afternoon.
* Mixing Height..........6700 ft AGL.
* CWR....................0 percent.
* Chance of thunder......4 percent.


$$

CAZ220-267-020000-
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 Mon Sep 1 2025

.TODAY...
* Sky/Weather............Sunny. Patchy smoke in the afternoon.
* Max Temperature........95-100.
*   24 HR Trend..........Little change.
* Min Humidity...........14-19 percent.
*   24 HR Trend..........5 percent up.
* 20-Foot Winds..........
*   Valleys/Lwr Slopes...East winds up to 8 mph shifting to the
    southwest in the afternoon.
*   Ridges/Upr Slopes....East winds up to 8 mph shifting to the
    southwest in the afternoon.
* CWR....................0 percent.
* Mixing Height..........9200 ft AGL.
* Chance of thunder......0 percent.

.TONIGHT...
* Sky/Weather............Mostly clear.
* Min Temperature........70-75.
*   24 HR Trend..........Little change.
* Max Humidity...........36-43 percent.
*   24 HR Trend..........4 percent up.
* 20-Foot Winds..........
*   Valleys/Lwr Slopes...Northwest winds up to 7 mph shifting to the
    east after midnight.
*   Ridges/Upr Slopes....Northeast winds up to 8 mph.
* CWR....................0 percent.
* Mixing Height..........500 ft AGL.
* Chance of thunder......1 percent.

.TUESDAY...
* Sky/Weather............Partly cloudy until late afternoon then
  clearing. At lower elevations, a slight chance of showers in the
  morning. At higher elevations, a slight chance of showers.
* Max Temperature........92-97.
* Min Humidity...........19-31 percent.
* 20-Foot Winds..........
*   Valleys/Lwr Slopes...East winds up to 7 mph shifting to the south
    up to 8 mph in the afternoon.
*   Ridges/Upr Slopes....East winds up to 8 mph shifting to the south
    in the afternoon.
* Mixing Height..........6900 ft AGL.
* CWR....................0 percent.
* Chance of thunder......10 percent.


$$

CAZ268-020000-
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 Mon Sep 1 2025

.TODAY...
* Sky/Weather............Mostly sunny.
* Max Temperature........83-89 lower elevations...except 76-83
  higher elevations.
*   24 HR Trend..........Little change.
* Min Humidity...........18-24 percent.
*   24 HR Trend..........4 percent up.
* 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..........8800 ft AGL.
* Chance of thunder......0 percent.

.TONIGHT...
* Sky/Weather............Mostly clear.
* Min Temperature........56-66.
*   24 HR Trend..........Little change.
* Max Humidity...........36-51 percent...except 55-70 percent in
  the high mountain valleys.
*   24 HR Trend..........4 percent up.
* 20-Foot Winds..........
*   Valleys/Lwr Slopes...South winds up to 8 mph shifting to the east
    5 to 11 mph after midnight.
*   Ridges/Upr Slopes....South winds 4 to 9 mph shifting to the east
    4 to 10 mph after midnight.
* CWR....................0 percent.
* Mixing Height..........300 ft AGL.
* Chance of thunder......0 percent.

.TUESDAY...
* Sky/Weather............Mostly sunny in the morning, then partly
  cloudy with a slight chance of showers in the afternoon.
* Max Temperature........83-89 lower elevations...except 76-84
  higher elevations.
* Min Humidity...........23-38 percent.
* 20-Foot Winds..........
*   Valleys/Lwr Slopes...Southeast winds 4 to 10 mph.
*   Ridges/Upr Slopes....Southeast winds 4 to 10 mph.
* Mixing Height..........9200 ft AGL.
* CWR....................0 percent.
* Chance of thunder......10 percent.


$$

CAZ221-269-020000-
Stanislaus NF West of the Sierra Crest-
Northern Sierra Including the Tahoe and Eldorado NF/S West of the
Sierra Crest-
1230 AM PDT Mon Sep 1 2025

.TODAY...
* Sky/Weather............Sunny. Patchy smoke in the afternoon.
* Max Temperature........90-95 lower elevations...except 75-85
  higher elevations.
*   24 HR Trend..........Little change.
* Min Humidity...........18-25 percent.
*   24 HR Trend..........Little change.
* 20-Foot Winds..........
*   Valleys/Lwr Slopes...South winds 4 to 10 mph.
*   Ridges/Upr Slopes....Southwest winds 4 to 10 mph. Local gusts up
    to 20 mph in the afternoon.
* CWR....................0 percent.
* Mixing Height..........9900 ft AGL.
* Chance of thunder......0 percent.

.TONIGHT...
* Sky/Weather............Mostly clear. Patchy smoke.
* Min Temperature........64-72 lower elevations...except 53-63
  higher elevations.
*   24 HR Trend..........Little change.
* Max Humidity...........39-54 percent.
*   24 HR Trend..........Little change.
* 20-Foot Winds..........
*   Valleys/Lwr Slopes...East winds 4 to 9 mph.
*   Ridges/Upr Slopes....East winds 4 to 9 mph.
* CWR....................0 percent.
* Mixing Height..........300 ft AGL.
* Chance of thunder......3 percent.

.TUESDAY...
* Sky/Weather............Mostly cloudy until late afternoon then
  becoming partly cloudy. A slight chance of showers in the
  morning. A chance of showers in the afternoon. A slight chance of
  thunderstorms late in the afternoon.
* Max Temperature........87-93 lower elevations...except 72-82
  higher elevations.
* Min Humidity...........26-41 percent.
* 20-Foot Winds..........
*   Valleys/Lwr Slopes...Southeast winds 4 to 9 mph.
*   Ridges/Upr Slopes....Southeast winds 4 to 9 mph.
* Mixing Height..........9200 ft AGL.
* CWR....................10 percent.
* Chance of thunder......20 percent.


$$


.Extended...

...Shasta County Mountains and Coastal Range
.TUESDAY NIGHT...Partly cloudy with a slight chance of showers.
Lows 58 to 68. North winds up to 10 mph.
.WEDNESDAY...Mostly sunny. Highs 83 to 93. Southeast winds up to
10 mph.
.WEDNESDAY NIGHT...Mostly clear. Lows 57 to 67. Northwest winds
up to 10 mph.
.THURSDAY...Mostly sunny. Highs 82 to 92. Southeast winds up to
10 mph.
.THURSDAY NIGHT...Partly cloudy. Lows 56 to 66. Variable less
than 5 mph.
.FRIDAY...Mostly sunny. Highs 78 to 88. South winds up to 10 mph.
.FRIDAY NIGHT...Mostly clear. Lows 53 to 63. Variable less than
5 mph.

...Northern Sierra and Lassen Park
.TUESDAY NIGHT...Partly cloudy with a slight chance of showers.
Lows 56 to 66. East winds up to 10 mph.
.WEDNESDAY...Mostly sunny. Highs 83 to 92. Southwest winds 5 to
15 mph.
.WEDNESDAY NIGHT...Mostly clear. Lows 57 to 67. Northeast winds
up to 10 mph.
.THURSDAY...Mostly sunny. Highs 82 to 91. Variable less than
5 mph.
.THURSDAY NIGHT...Partly cloudy. Lows 55 to 65. Variable less
than 5 mph.
.FRIDAY...Mostly sunny. Highs 79 to 88. Southwest winds up to
10 mph.
.FRIDAY NIGHT...Mostly clear. Lows 53 to 63. Variable less than
5 mph.

...Sierra Nevada Foothills
.TUESDAY NIGHT...Mostly clear. Lows 66 to 72. East winds up to
10 mph.
.WEDNESDAY...Mostly sunny. Highs 90 to 95. Southwest winds 5 to
15 mph.
.WEDNESDAY NIGHT...Mostly clear. Lows 65 to 71. East winds up to
10 mph.
.THURSDAY...Mostly sunny. Highs 89 to 94. Variable less than
5 mph.
.THURSDAY NIGHT...Mostly clear. Lows 64 to 69. Variable less than
5 mph.
.FRIDAY...Mostly sunny. Highs 86 to 91. Variable less than 5 mph.
.FRIDAY NIGHT...Mostly clear. Lows 61 to 66. Variable less than
5 mph.

...Central Valley and Delta
.TUESDAY NIGHT...Mostly clear. Lows 61 to 66. Southwest winds
5 to 15 mph.
.WEDNESDAY...Mostly sunny. Highs 94 to 99. West winds 5 to
15 mph.
.WEDNESDAY NIGHT...Mostly clear. Lows 60 to 67. Southwest winds
5 to 15 mph.
.THURSDAY...Mostly sunny. Highs 93 to 98. Southwest winds up to
10 mph.
.THURSDAY NIGHT...Mostly clear. Lows 59 to 64. South winds up to
10 mph.
.FRIDAY...Mostly sunny. Highs 89 to 94. Southwest winds up to
10 mph.
.FRIDAY NIGHT...Mostly clear. Lows 57 to 62. South winds up to
10 mph.

$$