167
FNUS56 KSTO 030731
FWFSTO

Fire Weather Planning Forecast for Interior Northern California
National Weather Service Sacramento CA
1230 AM PDT Wed Sep 3 2025

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


.DISCUSSION...Temperatures cool to near normal today and tomorrow
with marginal increases in Min RH trends into the 20s and 30s.
Chances for showers and thunderstorms over the mountains and their
adjacent foothills today and tomorrow afternoon and evening.
Diurnal, terrain driven winds forecasted with breezy afternoon
winds outside of any gusty winds from thunderstorms.


CAZ213-040000-
Eastern Portion of Shasta-Trinity NF-
1230 AM PDT Wed Sep 3 2025

.TODAY...
* Sky/Weather............Mostly sunny. Areas of smoke in the
  afternoon.
* Max Temperature........97-102 lower elevations...except 86-96
  higher elevations.
*   24 HR Trend..........Little change.
* Min Humidity...........21-27 percent.
*   24 HR Trend..........4 percent up.
* 20-Foot Winds..........
*   Valleys/Lwr Slopes...North winds up to 7 mph shifting to the
    south in the afternoon.
*   Ridges/Upr Slopes....Northeast winds up to 8 mph shifting to the
    south in the afternoon.
* CWR....................0 percent.
* Mixing Height..........9800 ft AGL.
* Chance of thunder......3 percent.

.TONIGHT...
* Sky/Weather............Mostly clear.
* Min Temperature........67-72 lower elevations...except 57-67
  higher elevations.
*   24 HR Trend..........Little change.
* Max Humidity...........50-65 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 becoming north up
    to 7 mph after midnight.
* CWR....................0 percent.
* Mixing Height..........700 ft AGL.
* Chance of thunder......3 percent.

.THURSDAY...
* Sky/Weather............Mostly sunny.
* Max Temperature........94-99 lower elevations...except 84-94
  higher elevations.
* Min Humidity...........20-35 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....Northeast winds up to 7 mph shifting to the
    south up to 8 mph in the afternoon.
* Mixing Height..........7200 ft AGL.
* CWR....................0 percent.
* Chance of thunder......2 percent.


$$

CAZ214-040000-
Burney Basin and Northeast Plateau in Shasta County Including
Northwest Lassen NF north of Lassen NP-
1230 AM PDT Wed Sep 3 2025

.TODAY...
* Sky/Weather............Mostly sunny. A slight chance of showers
  in the morning. Areas of smoke in the afternoon.
* Max Temperature........89-94 lower elevations...except 83-88
  higher elevations.
*   24 HR Trend..........4 degrees cooler.
* Min Humidity...........26-31 percent.
*   24 HR Trend..........8 percent up.
* 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..........9000 ft AGL.
* Chance of thunder......9 percent.

.TONIGHT...
* Sky/Weather............Mostly clear.
* Min Temperature........53-58.
*   24 HR Trend..........Little change.
* Max Humidity...........66-80 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....................0 percent.
* Mixing Height..........700 ft AGL.
* Chance of thunder......5 percent.

.THURSDAY...
* Sky/Weather............Mostly sunny.
* Max Temperature........90-95 lower elevations...except 82-88
  higher elevations.
* Min Humidity...........26-41 percent.
* 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.
* Mixing Height..........9500 ft AGL.
* CWR....................0 percent.
* Chance of thunder......3 percent.


$$

CAZ215-040000-
Northern Sacramento Valley to Southern Tehama County Line Below
1000 Ft-
1230 AM PDT Wed Sep 3 2025

.TODAY...
* Sky/Weather............Mostly sunny.
* Max Temperature........97-102.
*   24 HR Trend..........Little change.
* Min Humidity...........22-29 percent.
*   24 HR Trend..........5 percent up.
* 20-Foot Winds..........North winds up to 7 mph shifting to the
  south 4 to 9 mph with local gusts up to 20 mph in the afternoon.
* CWR....................0 percent.
* Mixing Height..........7300 ft AGL.
* Chance of thunder......2 percent.

.TONIGHT...
* Sky/Weather............Clear.
* Min Temperature........67-72.
*   24 HR Trend..........Little change.
* Max Humidity...........50-65 percent.
*   24 HR Trend..........6 percent down.
* 20-Foot Winds..........South winds up to 8 mph shifting to the
  north up to 6 mph after midnight.
* CWR....................0 percent.
* Mixing Height..........600 ft AGL.
* Chance of thunder......1 percent.

.THURSDAY...
* Sky/Weather............Mostly sunny.
* Max Temperature........96-101.
* Min Humidity...........19-34 percent.
* 20-Foot Winds..........Southeast winds up to 7 mph.
* Mixing Height..........5800 ft AGL.
* CWR....................0 percent.
* Chance of thunder......1 percent.


$$

CAZ216-040000-
Central Sacramento Valley in Glenn, Colusa, Yuba, Northern
Sutter, and Butte County Below 1000 Ft-
1230 AM PDT Wed Sep 3 2025

.TODAY...
* Sky/Weather............Mostly sunny.
* Max Temperature........94-99.
*   24 HR Trend..........5 degrees cooler.
* Min Humidity...........28-39 percent.
*   24 HR Trend..........5 percent up.
* 20-Foot Winds..........Southeast winds up to 8 mph.
* CWR....................0 percent.
* Mixing Height..........3800 ft AGL.
* Chance of thunder......1 percent.

.TONIGHT...
* Sky/Weather............Clear.
* Min Temperature........62-67.
*   24 HR Trend..........Little change.
* Max Humidity...........62-77 percent.
*   24 HR Trend..........4 percent down.
* 20-Foot Winds..........Southeast winds up to 7 mph.
* CWR....................0 percent.
* Mixing Height..........500 ft AGL.
* Chance of thunder......1 percent.

.THURSDAY...
* Sky/Weather............Mostly sunny.
* Max Temperature........93-98.
* Min Humidity...........24-39 percent.
* 20-Foot Winds..........Southeast winds up to 8 mph.
* Mixing Height..........4100 ft AGL.
* CWR....................0 percent.
* Chance of thunder......0 percent.


$$

CAZ217-040000-
Southern Sacramento Valley in Yolo-
Sacramento Far Western Placer, southern Sutter and Solano County
Below 1000 Ft-
1230 AM PDT Wed Sep 3 2025

.TODAY...
* Sky/Weather............Sunny.
* Max Temperature........93-98.
*   24 HR Trend..........4 degrees cooler.
* Min Humidity...........23-30 percent.
*   24 HR Trend..........Little change.
* 20-Foot Winds..........Southwest winds 4 to 10 mph. Local gusts
  up to 20 mph in the afternoon.
* CWR....................0 percent.
* Mixing Height..........3500 ft AGL.
* Chance of thunder......0 percent.

.TONIGHT...
* Sky/Weather............Mostly clear.
* Min Temperature........58-64.
*   24 HR Trend..........Little change.
* Max Humidity...........69-84 percent.
*   24 HR Trend..........Little change.
* 20-Foot Winds..........South winds 5 to 11 mph.
* CWR....................0 percent.
* Mixing Height..........500 ft AGL.
* Chance of thunder......0 percent.

.THURSDAY...
* Sky/Weather............Mostly sunny.
* Max Temperature........91-96.
* Min Humidity...........25-40 percent.
* 20-Foot Winds..........South winds 5 to 11 mph. Local gusts up to
  20 mph in the afternoon.
* Mixing Height..........3200 ft AGL.
* CWR....................0 percent.
* Chance of thunder......0 percent.


$$

CAZ218-040000-
Carquinez Strait and Delta-
1230 AM PDT Wed Sep 3 2025

.TODAY...
* Sky/Weather............Partly cloudy in the morning then
  clearing.
* Max Temperature........85-93.
*   24 HR Trend..........5 degrees cooler.
* Min Humidity...........31-41 percent.
*   24 HR Trend..........Little change.
* 20-Foot Winds..........West winds 8 to 14 mph with local gusts up
  to 25 mph.
* CWR....................0 percent.
* Mixing Height..........2200 ft AGL.
* Chance of thunder......0 percent.

.TONIGHT...
* Sky/Weather............Clear in the evening then becoming partly
  cloudy.
* Min Temperature........57-62.
*   24 HR Trend..........Little change.
* Max Humidity...........82-91 percent.
*   24 HR Trend..........Little change.
* 20-Foot Winds..........West winds 8 to 14 mph with local gusts up
  to 30 mph.
* CWR....................0 percent.
* Mixing Height..........500 ft AGL.
* Chance of thunder......0 percent.

.THURSDAY...
* Sky/Weather............Partly cloudy early in the morning then
  clearing.
* Max Temperature........80-90.
* Min Humidity...........54-69 percent.
* 20-Foot Winds..........West winds 9 to 15 mph with local gusts up
  to 30 mph.
* Mixing Height..........1800 ft AGL.
* CWR....................0 percent.
* Chance of thunder......0 percent.


$$

CAZ219-040000-
Northern San Joaquin Valley in San Joaquin and Stanislaus
Counties Below 1000 ft-
1230 AM PDT Wed Sep 3 2025

.TODAY...
* Sky/Weather............Mostly sunny.
* Max Temperature........93-98.
*   24 HR Trend..........5 degrees cooler.
* Min Humidity...........26-32 percent.
*   24 HR Trend..........Little change.
* 20-Foot Winds..........Northwest winds 4 to 9 mph.
* CWR....................0 percent.
* Mixing Height..........3700 ft AGL.
* Chance of thunder......0 percent.

.TONIGHT...
* Sky/Weather............Clear.
* Min Temperature........60-65.
*   24 HR Trend..........Little change.
* Max Humidity...........63-78 percent.
*   24 HR Trend..........Little change.
* 20-Foot Winds..........Northwest winds 6 to 12 mph.
* CWR....................0 percent.
* Mixing Height..........600 ft AGL.
* Chance of thunder......0 percent.

.THURSDAY...
* Sky/Weather............Mostly sunny.
* Max Temperature........90-95.
* Min Humidity...........25-40 percent.
* 20-Foot Winds..........Northwest winds 6 to 12 mph.
* Mixing Height..........3100 ft AGL.
* CWR....................0 percent.
* Chance of thunder......0 percent.


$$

CAZ263-279-040000-
Southeast Edge Shasta-Trinity NF and Western Portions of Tehama-
Glenn Unit-Eastern Mendocino NF-
1230 AM PDT Wed Sep 3 2025

.TODAY...
* Sky/Weather............Sunny.
* Max Temperature........95-100 lower elevations...except 79-89
  higher elevations.
*   24 HR Trend..........Little change.
* Min Humidity...........22-27 percent.
*   24 HR Trend..........4 percent up.
* 20-Foot Winds..........
*   Valleys/Lwr Slopes...East winds 5 to 11 mph with local gusts up
    to 20 mph.
*   Ridges/Upr Slopes....Southeast winds 5 to 11 mph.
* CWR....................0 percent.
* Mixing Height..........7600 ft AGL.
* Chance of thunder......3 percent.

.TONIGHT...
* Sky/Weather............Mostly clear.
* Min Temperature........71-76 lower elevations...except 62-69
  higher elevations.
*   24 HR Trend..........Little change.
* Max Humidity...........34-42 percent.
*   24 HR Trend..........8 percent down.
* 20-Foot Winds..........
*   Valleys/Lwr Slopes...Southwest winds up to 8 mph shifting to the
    northwest up to 7 mph after midnight.
*   Ridges/Upr Slopes....Southwest winds up to 8 mph.
* CWR....................0 percent.
* Mixing Height..........600 ft AGL.
* Chance of thunder......1 percent.

.THURSDAY...
* Sky/Weather............Mostly sunny.
* Max Temperature........94-99 lower elevations...except 78-88
  higher elevations.
* Min Humidity...........20-35 percent.
* 20-Foot Winds..........
*   Valleys/Lwr Slopes...Northwest winds up to 7 mph shifting to the
    southeast 4 to 9 mph with local gusts up to 20 mph in the
    afternoon.
*   Ridges/Upr Slopes....Northwest winds up to 7 mph shifting to the
    southeast 5 to 11 mph in the afternoon.
* Mixing Height..........6400 ft AGL.
* CWR....................0 percent.
* Chance of thunder......1 percent.


$$

CAZ266-040000-
Northern Sierra Foothills from 1000 to 3000 Ft. Includes portions
of Shasta-Trinity and Butte Units-
1230 AM PDT Wed Sep 3 2025

.TODAY...
* Sky/Weather............Mostly sunny.
* Max Temperature........92-97 lower elevations...except 87-95
  higher elevations.
*   24 HR Trend..........Little change.
* Min Humidity...........26-34 percent.
*   24 HR Trend..........7 percent up.
* 20-Foot Winds..........
*   Valleys/Lwr Slopes...Northwest winds 6 to 12 mph shifting to the
    southwest up to 8 mph in the afternoon.
*   Ridges/Upr Slopes....Northeast winds 5 to 11 mph shifting to the
    southwest up to 7 mph in the afternoon.
* CWR....................0 percent.
* Mixing Height..........5900 ft AGL.
* Chance of thunder......4 percent.

.TONIGHT...
* Sky/Weather............Clear.
* Min Temperature........67-72.
*   24 HR Trend..........Little change.
* Max Humidity...........45-58 percent.
*   24 HR Trend..........4 percent down.
* 20-Foot Winds..........
*   Valleys/Lwr Slopes...East winds up to 8 mph.
*   Ridges/Upr Slopes....East winds up to 8 mph.
* CWR....................0 percent.
* Mixing Height..........500 ft AGL.
* Chance of thunder......3 percent.

.THURSDAY...
* Sky/Weather............Mostly sunny.
* Max Temperature........91-96 lower elevations...except 86-92
  higher elevations.
* Min Humidity...........26-41 percent.
* 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 7 mph shifting to the
    southwest in the afternoon.
* Mixing Height..........5300 ft AGL.
* CWR....................0 percent.
* Chance of thunder......1 percent.


$$

CAZ220-267-040000-
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 Wed Sep 3 2025

.TODAY...
* Sky/Weather............Mostly sunny. Areas of smoke in the
  morning.
* Max Temperature........90-95.
*   24 HR Trend..........4 degrees cooler.
* Min Humidity...........28-33 percent.
*   24 HR Trend..........5 percent up.
* 20-Foot Winds..........
*   Valleys/Lwr Slopes...Upslope winds up to 5 mph becoming west up
    to 8 mph in the afternoon.
*   Ridges/Upr Slopes....Southeast winds up to 7 mph shifting to the
    west up to 8 mph in the afternoon.
* CWR....................0 percent.
* Mixing Height..........5000 ft AGL.
* Chance of thunder......5 percent.

.TONIGHT...
* Sky/Weather............Mostly clear.
* Min Temperature........65-70.
*   24 HR Trend..........Little change.
* Max Humidity...........53-63 percent.
*   24 HR Trend..........Little change.
* 20-Foot Winds..........
*   Valleys/Lwr Slopes...West winds up to 7 mph shifting to the
    northeast after midnight.
*   Ridges/Upr Slopes....North winds up to 8 mph.
* CWR....................0 percent.
* Mixing Height..........500 ft AGL.
* Chance of thunder......3 percent.

.THURSDAY...
* Sky/Weather............Sunny.
* Max Temperature........88-93.
* Min Humidity...........21-35 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
    southwest up to 8 mph in the afternoon.
* Mixing Height..........4800 ft AGL.
* CWR....................0 percent.
* Chance of thunder......1 percent.


$$

CAZ268-040000-
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 Wed Sep 3 2025

.TODAY...
* Sky/Weather............Mostly sunny. Areas of smoke.
* Max Temperature........82-89 lower elevations...except 75-83
  higher elevations.
*   24 HR Trend..........Little change.
* Min Humidity...........28-38 percent.
*   24 HR Trend..........9 percent up.
* 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....East winds 6 to 12 mph shifting to the
    southwest up to 8 mph in the afternoon.
* CWR....................0 percent.
* Mixing Height..........8000 ft AGL.
* Chance of thunder......12 percent.

.TONIGHT...
* Sky/Weather............Mostly clear.
* Min Temperature........53-63.
*   24 HR Trend..........Little change.
* Max Humidity...........56-71 percent...except 79-94 percent in
  the high mountain valleys.
*   24 HR Trend..........Little change.
* 20-Foot Winds..........
*   Valleys/Lwr Slopes...West winds up to 7 mph shifting to the
    northeast after midnight.
*   Ridges/Upr Slopes....West winds up to 8 mph shifting to the
    northeast up to 7 mph after midnight.
* CWR....................0 percent.
* Mixing Height..........300 ft AGL.
* Chance of thunder......7 percent.

.THURSDAY...
* Sky/Weather............Mostly sunny.
* Max Temperature........81-87 lower elevations...except 74-82
  higher elevations.
* Min Humidity...........30-45 percent.
* 20-Foot Winds..........
*   Valleys/Lwr Slopes...Northeast winds 4 to 9 mph shifting to the
    southwest up to 8 mph in the afternoon.
*   Ridges/Upr Slopes....East winds up to 8 mph shifting to the
    southwest in the afternoon.
* Mixing Height..........7300 ft AGL.
* CWR....................0 percent.
* Chance of thunder......5 percent.


$$

CAZ221-269-040000-
Stanislaus NF West of the Sierra Crest-
Northern Sierra Including the Tahoe and Eldorado NF/S West of the
Sierra Crest-
1230 AM PDT Wed Sep 3 2025

.TODAY...
* Sky/Weather............Mostly sunny. Areas of smoke through the
  day. A slight chance of showers and thunderstorms in the
  afternoon.
* Max Temperature........85-91 lower elevations...except 72-82
  higher elevations.
*   24 HR Trend..........Little change.
* Min Humidity...........30-42 percent.
*   24 HR Trend..........11 percent up.
* 20-Foot Winds..........
*   Valleys/Lwr Slopes...Southeast winds up to 8 mph shifting to the
    southwest in the afternoon.
*   Ridges/Upr Slopes....East winds 5 to 11 mph shifting to the west
    up to 7 mph in the afternoon.
* CWR....................0 percent.
* Mixing Height..........7400 ft AGL.
* Chance of thunder......15 percent.

.TONIGHT...
* Sky/Weather............Mostly clear. Areas of smoke after
  midnight.
* Min Temperature........60-69 lower elevations...except 49-59
  higher elevations.
*   24 HR Trend..........Little change.
* Max Humidity...........52-67 percent lower elevations...except
  64-79 percent high elevations.
*   24 HR Trend..........Little change.
* 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..........300 ft AGL.
* Chance of thunder......6 percent.

.THURSDAY...
* 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........84-90 lower elevations...except 70-80
  higher elevations.
* Min Humidity...........31-46 percent.
* 20-Foot Winds..........
*   Valleys/Lwr Slopes...East winds up to 7 mph shifting to the
    southwest 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..........7200 ft AGL.
* CWR....................0 percent.
* Chance of thunder......6 percent.


$$


.Extended...

...Shasta County Mountains and Coastal Range
.THURSDAY NIGHT...Mostly clear. Lows 55 to 64. West winds up to
10 mph.
.FRIDAY...Sunny. Highs 76 to 86. South winds up to 10 mph.
.FRIDAY NIGHT...Mostly clear. Lows 50 to 60. West winds up to
10 mph.
.SATURDAY...Mostly sunny. Highs 72 to 81. Southwest winds up to
10 mph.
.SATURDAY NIGHT...Mostly clear. Lows 50 to 60. Variable less than
5 mph.
.SUNDAY...Mostly sunny. Highs 71 to 81. South winds up to 10 mph.
.SUNDAY NIGHT...Partly cloudy with a slight chance of showers.
Lows 49 to 59. Variable less than 5 mph.

...Northern Sierra and Lassen Park
.THURSDAY NIGHT...Mostly clear. Lows 54 to 64. Northeast winds up
to 10 mph.
.FRIDAY...Sunny. Highs 78 to 86. Southwest winds up to 10 mph.
.FRIDAY NIGHT...Mostly clear. Lows 50 to 60. Southeast winds up
to 10 mph.
.SATURDAY...Sunny. Highs 73 to 82. Southwest winds up to 10 mph.
.SATURDAY NIGHT...Mostly clear. Lows 48 to 58. Variable less than
5 mph.
.SUNDAY...Sunny. Highs 72 to 81. South winds up to 10 mph.
.SUNDAY NIGHT...Mostly clear. Lows 47 to 57. Variable less than
5 mph.

...Sierra Nevada Foothills
.THURSDAY NIGHT...Mostly clear. Lows 61 to 67. East winds up to
10 mph.
.FRIDAY...Sunny. Highs 83 to 88. Southwest winds up to 10 mph.
.FRIDAY NIGHT...Clear. Lows 58 to 63. Southeast winds up to
10 mph.
.SATURDAY...Sunny. Highs 80 to 85. Southwest winds up to 10 mph.
.SATURDAY NIGHT...Clear. Lows 58 to 63. Variable less than 5 mph.
.SUNDAY...Sunny. Highs 80 to 85. Southwest winds up to 10 mph.
.SUNDAY NIGHT...Mostly clear. Lows 57 to 62. Variable less than
5 mph.

...Central Valley and Delta
.THURSDAY NIGHT...Clear. Lows 58 to 63. Southwest winds 10 to
20 mph.
.FRIDAY...Mostly sunny. Highs 85 to 90. Southwest winds 5 to
15 mph.
.FRIDAY NIGHT...Clear. Lows 57 to 62. South winds 5 to 15 mph.
.SATURDAY...Mostly sunny. Highs 85 to 90. Southwest winds up to
10 mph.
.SATURDAY NIGHT...Clear. Lows 58 to 63. Southwest winds up to
10 mph.
.SUNDAY...Sunny. Highs 85 to 90. Southwest winds up to 10 mph.
.SUNDAY NIGHT...Mostly clear. Lows 58 to 63. Southwest winds up
to 10 mph.

$$