523
FNUS56 KSTO 180730
FWFSTO

Fire Weather Planning Forecast for Interior Northern California
National Weather Service Sacramento CA
1230 AM PDT Mon Aug 18 2025

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



.DISCUSSION...
Near to below normal temperatures continue into the early week
ahead as periodically breezy onshore flow persists. Drier
conditions and lesser overnight humidity recovery anticipated
through the week, with above normal temperatures returning mid to
late week.




CAZ213-190000-
Eastern Portion of Shasta-Trinity NF-
1230 AM PDT Mon Aug 18 2025

.TODAY...
* Sky/Weather............Sunny.
* Max Temperature........82-87 lower elevations...except 73-82
  higher elevations.
*   24 HR Trend..........Little change.
* Min Humidity...........21-27 percent.
*   24 HR Trend..........18 percent down.
* 20-Foot Winds..........
*   Valleys/Lwr Slopes...Upslope winds up to 5 mph becoming south up
    to 8 mph in the afternoon.
*   Ridges/Upr Slopes....Southwest winds up to 8 mph.
* CWR....................0 percent.
* Mixing Height..........5100 ft AGL.
* Chance of thunder......0 percent.

.TONIGHT...
* Sky/Weather............Clear.
* Min Temperature........57-62 lower elevations...except 47-57
  higher elevations.
*   24 HR Trend..........Little change.
* Max Humidity...........48-63 percent.
*   24 HR Trend..........24 percent down.
* 20-Foot Winds..........
*   Valleys/Lwr Slopes...Drainage winds up to 5 mph.
*   Ridges/Upr Slopes....Southwest winds up to 7 mph shifting to the
    northeast after midnight.
* CWR....................0 percent.
* Mixing Height..........700 ft AGL.
* Chance of thunder......0 percent.

.TUESDAY...
* Sky/Weather............Sunny.
* Max Temperature........87-92 lower elevations...except 76-86
  higher elevations.
* Min Humidity...........15-29 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 south up
    to 8 mph in the afternoon.
* Mixing Height..........5500 ft AGL.
* CWR....................0 percent.
* Chance of thunder......0 percent.


$$

CAZ214-190000-
Burney Basin and Northeast Plateau in Shasta County Including
Northwest Lassen NF north of Lassen NP-
1230 AM PDT Mon Aug 18 2025

.TODAY...
* Sky/Weather............Sunny.
* Max Temperature........76-81.
*   24 HR Trend..........Little change.
* Min Humidity...........24-29 percent.
*   24 HR Trend..........18 percent down.
* 20-Foot Winds..........
*   Valleys/Lwr Slopes...Upslope winds up to 5 mph becoming west 6 to
    12 mph in the afternoon.
*   Ridges/Upr Slopes....Northwest winds 4 to 10 mph.
* CWR....................0 percent.
* Mixing Height..........5900 ft AGL.
* Chance of thunder......0 percent.

.TONIGHT...
* Sky/Weather............Clear.
* Min Temperature........44-50.
*   24 HR Trend..........Little change.
* Max Humidity...........55-69 percent.
*   24 HR Trend..........24 percent down.
* 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....Southwest winds 4 to 9 mph with local gusts
    up to 20 mph in the evening becoming variable up to 5 mph.
* CWR....................0 percent.
* Mixing Height..........700 ft AGL.
* Chance of thunder......0 percent.

.TUESDAY...
* Sky/Weather............Sunny.
* Max Temperature........82-87 lower elevations...except 76-82
  higher elevations.
* Min Humidity...........19-27 percent.
* 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....Variable winds up to 7 mph becoming west up
    to 8 mph with local gusts up to 20 mph in the afternoon.
* Mixing Height..........7000 ft AGL.
* CWR....................0 percent.
* Chance of thunder......0 percent.


$$

CAZ215-190000-
Northern Sacramento Valley to Southern Tehama County Line Below
1000 Ft-
1230 AM PDT Mon Aug 18 2025

.TODAY...
* Sky/Weather............Sunny.
* Max Temperature........85-90.
*   24 HR Trend..........Little change.
* Min Humidity...........22-31 percent.
*   24 HR Trend..........14 percent down.
* 20-Foot Winds..........Southeast winds up to 8 mph. Local gusts
  up to 20 mph in the afternoon.
* CWR....................0 percent.
* Mixing Height..........5200 ft AGL.
* Chance of thunder......0 percent.

.TONIGHT...
* Sky/Weather............Clear.
* Min Temperature........58-63.
*   24 HR Trend..........Little change.
* Max Humidity...........56-70 percent.
*   24 HR Trend..........18 percent down.
* 20-Foot Winds..........South winds up to 8 mph shifting to the
  northeast up to 6 mph after midnight.
* CWR....................0 percent.
* Mixing Height..........600 ft AGL.
* Chance of thunder......0 percent.

.TUESDAY...
* Sky/Weather............Sunny.
* Max Temperature........90-95.
* Min Humidity...........17-32 percent.
* 20-Foot Winds..........North winds up to 6 mph shifting to the
  south up to 8 mph in the afternoon.
* Mixing Height..........5600 ft AGL.
* CWR....................0 percent.
* Chance of thunder......0 percent.


$$

CAZ216-190000-
Central Sacramento Valley in Glenn, Colusa, Yuba, Northern
Sutter, and Butte County Below 1000 Ft-
1230 AM PDT Mon Aug 18 2025

.TODAY...
* Sky/Weather............Mostly sunny.
* Max Temperature........83-88.
*   24 HR Trend..........Little change.
* Min Humidity...........30-42 percent.
*   24 HR Trend..........13 percent down.
* 20-Foot Winds..........Southeast winds up to 8 mph.
* CWR....................0 percent.
* Mixing Height..........4100 ft AGL.
* Chance of thunder......0 percent.

.TONIGHT...
* Sky/Weather............Clear.
* Min Temperature........55-60.
*   24 HR Trend..........Little change.
* Max Humidity...........71-86 percent.
*   24 HR Trend..........14 percent down.
* 20-Foot Winds..........Southeast winds up to 8 mph.
* CWR....................0 percent.
* Mixing Height..........500 ft AGL.
* Chance of thunder......0 percent.

.TUESDAY...
* Sky/Weather............Sunny.
* Max Temperature........87-92.
* Min Humidity...........24-39 percent.
* 20-Foot Winds..........Northeast winds up to 7 mph shifting to
  the south up to 8 mph in the afternoon.
* Mixing Height..........4100 ft AGL.
* CWR....................0 percent.
* Chance of thunder......0 percent.


$$

CAZ217-190000-
Southern Sacramento Valley in Yolo-
Sacramento Far Western Placer, southern Sutter and Solano County
Below 1000 Ft-
1230 AM PDT Mon Aug 18 2025

.TODAY...
* Sky/Weather............Mostly sunny.
* Max Temperature........85-90.
*   24 HR Trend..........Little change.
* Min Humidity...........28-34 percent.
*   24 HR Trend..........11 percent down.
* 20-Foot Winds..........South winds 4 to 10 mph. Local gusts up to
  20 mph in the afternoon.
* CWR....................0 percent.
* Mixing Height..........4400 ft AGL.
* Chance of thunder......0 percent.

.TONIGHT...
* Sky/Weather............Clear.
* Min Temperature........53-58.
*   24 HR Trend..........Little change.
* Max Humidity...........73-88 percent.
*   24 HR Trend..........8 percent down.
* 20-Foot Winds..........South winds 4 to 10 mph. Local gusts up to
  20 mph in the evening.
* CWR....................0 percent.
* Mixing Height..........500 ft AGL.
* Chance of thunder......0 percent.

.TUESDAY...
* Sky/Weather............Sunny.
* Max Temperature........86-91.
* Min Humidity...........24-39 percent.
* 20-Foot Winds..........South winds up to 8 mph.
* Mixing Height..........3900 ft AGL.
* CWR....................0 percent.
* Chance of thunder......0 percent.


$$

CAZ218-190000-
Carquinez Strait and Delta-
1230 AM PDT Mon Aug 18 2025

.TODAY...
* Sky/Weather............Sunny.
* Max Temperature........80-85.
*   24 HR Trend..........4 degrees warmer.
* Min Humidity...........34-40 percent.
*   24 HR Trend..........11 percent down.
* 20-Foot Winds..........West winds 8 to 14 mph with local gusts up
  to 25 mph.
* CWR....................0 percent.
* Mixing Height..........3400 ft AGL.
* Chance of thunder......0 percent.

.TONIGHT...
* Sky/Weather............Mostly clear.
* Min Temperature........54-59.
*   24 HR Trend..........Little change.
* Max Humidity...........80-89 percent.
*   24 HR Trend..........Little change.
* 20-Foot Winds..........Southwest winds 7 to 13 mph with local
  gusts up to 25 mph.
* CWR....................0 percent.
* Mixing Height..........600 ft AGL.
* Chance of thunder......0 percent.

.TUESDAY...
* Sky/Weather............Sunny.
* Max Temperature........79-87.
* Min Humidity...........43-58 percent.
* 20-Foot Winds..........West winds 7 to 13 mph.
* Mixing Height..........2700 ft AGL.
* CWR....................0 percent.
* Chance of thunder......0 percent.


$$

CAZ219-190000-
Northern San Joaquin Valley in San Joaquin and Stanislaus
Counties Below 1000 ft-
1230 AM PDT Mon Aug 18 2025

.TODAY...
* Sky/Weather............Sunny.
* Max Temperature........85-90.
*   24 HR Trend..........Little change.
* Min Humidity...........28-35 percent.
*   24 HR Trend..........7 percent down.
* 20-Foot Winds..........Northwest winds 8 to 14 mph.
* CWR....................0 percent.
* Mixing Height..........4200 ft AGL.
* Chance of thunder......0 percent.

.TONIGHT...
* Sky/Weather............Clear.
* Min Temperature........56-61.
*   24 HR Trend..........Little change.
* Max Humidity...........64-79 percent.
*   24 HR Trend..........7 percent down.
* 20-Foot Winds..........Northwest winds 8 to 14 mph.
* CWR....................0 percent.
* Mixing Height..........600 ft AGL.
* Chance of thunder......0 percent.

.TUESDAY...
* Sky/Weather............Sunny.
* Max Temperature........85-90.
* Min Humidity...........22-37 percent.
* 20-Foot Winds..........Northwest winds 6 to 12 mph.
* Mixing Height..........3700 ft AGL.
* CWR....................0 percent.
* Chance of thunder......0 percent.


$$

CAZ263-279-190000-
Southeast Edge Shasta-Trinity NF and Western Portions of Tehama-
Glenn Unit-Eastern Mendocino NF-
1230 AM PDT Mon Aug 18 2025

.TODAY...
* Sky/Weather............Mostly sunny.
* Max Temperature........82-87 lower elevations...except 68-77
  higher elevations.
*   24 HR Trend..........Little change.
* Min Humidity...........28-38 percent.
*   24 HR Trend..........17 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..........4700 ft AGL.
* Chance of thunder......0 percent.

.TONIGHT...
* Sky/Weather............Clear.
* Min Temperature........61-66 lower elevations...except 53-59
  higher elevations.
*   24 HR Trend..........Little change.
* Max Humidity...........49-58 percent.
*   24 HR Trend..........19 percent down.
* 20-Foot Winds..........
*   Valleys/Lwr Slopes...South winds up to 7 mph shifting to the
    northwest after midnight.
*   Ridges/Upr Slopes....West winds up to 8 mph.
* CWR....................0 percent.
* Mixing Height..........600 ft AGL.
* Chance of thunder......0 percent.

.TUESDAY...
* Sky/Weather............Sunny.
* Max Temperature........87-92 lower elevations...except 71-81
  higher elevations.
* Min Humidity...........24-39 percent.
* 20-Foot Winds..........
*   Valleys/Lwr Slopes...Upslope winds up to 5 mph becoming east up
    to 8 mph in the afternoon.
*   Ridges/Upr Slopes....Northwest winds up to 8 mph shifting to the
    southeast in the afternoon.
* Mixing Height..........5200 ft AGL.
* CWR....................0 percent.
* Chance of thunder......0 percent.


$$

CAZ266-190000-
Northern Sierra Foothills from 1000 to 3000 Ft. Includes portions
of Shasta-Trinity and Butte Units-
1230 AM PDT Mon Aug 18 2025

.TODAY...
* Sky/Weather............Sunny.
* Max Temperature........79-85.
*   24 HR Trend..........Little change.
* Min Humidity...........25-32 percent.
*   24 HR Trend..........13 percent down.
* 20-Foot Winds..........
*   Valleys/Lwr Slopes...Southwest winds 4 to 9 mph.
*   Ridges/Upr Slopes....Southwest winds 4 to 9 mph.
* CWR....................0 percent.
* Mixing Height..........4800 ft AGL.
* Chance of thunder......0 percent.

.TONIGHT...
* Sky/Weather............Clear.
* Min Temperature........58-63.
*   24 HR Trend..........4 degrees warmer.
* Max Humidity...........44-55 percent.
*   24 HR Trend..........22 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......0 percent.

.TUESDAY...
* Sky/Weather............Sunny.
* Max Temperature........85-90 lower elevations...except 80-86
  higher elevations.
* Min Humidity...........22-37 percent.
* 20-Foot Winds..........
*   Valleys/Lwr Slopes...Northeast winds up to 8 mph shifting to the
    southwest in the afternoon.
*   Ridges/Upr Slopes....Northeast winds up to 7 mph shifting to the
    southwest in the afternoon.
* Mixing Height..........5100 ft AGL.
* CWR....................0 percent.
* Chance of thunder......0 percent.


$$

CAZ220-267-190000-
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 Aug 18 2025

.TODAY...
* Sky/Weather............Sunny.
* Max Temperature........81-86.
*   24 HR Trend..........Little change.
* Min Humidity...........26-32 percent.
*   24 HR Trend..........12 percent down.
* 20-Foot Winds..........
*   Valleys/Lwr Slopes...Southwest winds up to 8 mph.
*   Ridges/Upr Slopes....Variable winds up to 7 mph becoming
    southwest up to 8 mph in the afternoon.
* CWR....................0 percent.
* Mixing Height..........4400 ft AGL.
* Chance of thunder......0 percent.

.TONIGHT...
* Sky/Weather............Clear.
* Min Temperature........57-62.
*   24 HR Trend..........Little change.
* Max Humidity...........55-67 percent.
*   24 HR Trend..........18 percent down.
* 20-Foot Winds..........
*   Valleys/Lwr Slopes...Southwest winds up to 7 mph shifting to the
    east after midnight.
*   Ridges/Upr Slopes....West winds up to 7 mph in the evening
    becoming variable up to 5 mph.
* CWR....................0 percent.
* Mixing Height..........500 ft AGL.
* Chance of thunder......0 percent.

.TUESDAY...
* Sky/Weather............Sunny.
* Max Temperature........84-89.
* Min Humidity...........19-34 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..........4400 ft AGL.
* CWR....................0 percent.
* Chance of thunder......0 percent.


$$

CAZ268-190000-
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 Aug 18 2025

.TODAY...
* Sky/Weather............Sunny.
* Max Temperature........72-80 lower elevations...except 66-74
  higher elevations.
*   24 HR Trend..........Little change.
* Min Humidity...........21-34 percent.
*   24 HR Trend..........18 percent down.
* 20-Foot Winds..........
*   Valleys/Lwr Slopes...Southwest winds 5 to 11 mph.
*   Ridges/Upr Slopes....Southwest winds 5 to 11 mph.
* CWR....................0 percent.
* Mixing Height..........4600 ft AGL.
* Chance of thunder......0 percent.

.TONIGHT...
* Sky/Weather............Clear.
* Min Temperature........45-55.
*   24 HR Trend..........Little change.
* Max Humidity...........46-61 percent...except 67-82 percent in
  the high mountain valleys.
*   24 HR Trend..........19 percent down.
* 20-Foot Winds..........
*   Valleys/Lwr Slopes...South winds up to 8 mph shifting to the east
    up to 7 mph after midnight.
*   Ridges/Upr Slopes....South winds up to 8 mph.
* CWR....................0 percent.
* Mixing Height..........400 ft AGL.
* Chance of thunder......0 percent.

.TUESDAY...
* Sky/Weather............Sunny.
* Max Temperature........75-83 lower elevations...except 69-77
  higher elevations.
* Min Humidity...........21-36 percent.
* 20-Foot Winds..........
*   Valleys/Lwr Slopes...East winds up to 8 mph shifting to the
    southwest 4 to 10 mph with local gusts up to 20 mph in the
    afternoon.
*   Ridges/Upr Slopes....East winds up to 8 mph shifting to the
    southwest 5 to 11 mph in the afternoon.
* Mixing Height..........5600 ft AGL.
* CWR....................0 percent.
* Chance of thunder......0 percent.


$$

CAZ221-269-190000-
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 Aug 18 2025

.TODAY...
* Sky/Weather............Sunny.
* Max Temperature........77-83 lower elevations...except 67-77
  higher elevations.
*   24 HR Trend..........Little change.
* Min Humidity...........29-38 percent.
*   24 HR Trend..........13 percent down.
* 20-Foot Winds..........
*   Valleys/Lwr Slopes...Southwest winds 5 to 11 mph.
*   Ridges/Upr Slopes....Southwest winds 5 to 11 mph.
* CWR....................0 percent.
* Mixing Height..........4100 ft AGL.
* Chance of thunder......0 percent.

.TONIGHT...
* Sky/Weather............Clear.
* Min Temperature........53-61 lower elevations...except 44-54
  higher elevations.
*   24 HR Trend..........Little change.
* Max Humidity...........51-66 percent.
*   24 HR Trend..........20 percent down.
* 20-Foot Winds..........
*   Valleys/Lwr Slopes...South winds up to 7 mph in the evening
    becoming drainage up to 5 mph.
*   Ridges/Upr Slopes....South winds up to 8 mph.
* CWR....................0 percent.
* Mixing Height..........300 ft AGL.
* Chance of thunder......0 percent.

.TUESDAY...
* Sky/Weather............Sunny.
* Max Temperature........79-85 lower elevations...except 68-78
  higher elevations.
* Min Humidity...........24-39 percent.
* 20-Foot Winds..........
*   Valleys/Lwr Slopes...East winds up to 7 mph shifting to the
    southwest 4 to 9 mph in the afternoon.
*   Ridges/Upr Slopes....Southeast winds up to 8 mph shifting to the
    southwest 5 to 11 mph in the afternoon.
* Mixing Height..........5100 ft AGL.
* CWR....................0 percent.
* Chance of thunder......0 percent.


$$


.Extended...

...Shasta County Mountains and Coastal Range
.TUESDAY NIGHT...Clear. Lows 51 to 61. Northwest winds up to
10 mph.
.WEDNESDAY...Sunny. Highs 80 to 90. North winds up to 10 mph.
.WEDNESDAY NIGHT...Clear. Lows 55 to 65. Northwest winds 5 to
15 mph.
.THURSDAY...Warmer, sunny. Highs 87 to 97. Northeast winds up to
10 mph.
.THURSDAY NIGHT...Clear. Lows 58 to 68. Variable less than 5 mph.
.FRIDAY...Sunny. Highs 87 to 97. Southeast winds up to 10 mph.
.FRIDAY NIGHT...Clear. Lows 61 to 71. Variable less than 5 mph.

...Northern Sierra and Lassen Park
.TUESDAY NIGHT...Clear. Lows 49 to 59. East winds up to 10 mph.
.WEDNESDAY...Sunny. Highs 81 to 90. West winds 5 to 15 mph.
.WEDNESDAY NIGHT...Clear. Lows 54 to 64. Northeast winds up to
10 mph.
.THURSDAY...Warmer, sunny. Highs 87 to 96. Variable less than
5 mph.
.THURSDAY NIGHT...Mostly clear. Lows 59 to 69. Variable less than
5 mph.
.FRIDAY...Mostly sunny. Highs 89 to 98. Southwest winds up to
10 mph.
.FRIDAY NIGHT...Mostly clear. Lows 61 to 71. Variable less than
5 mph.

...Sierra Nevada Foothills
.TUESDAY NIGHT...Clear. Lows 58 to 64. East winds up to 10 mph.
.WEDNESDAY...Sunny. Highs 88 to 93. Northwest winds up to 10 mph.
.WEDNESDAY NIGHT...Clear. Lows 64 to 69. Northeast winds up to
10 mph.
.THURSDAY...Sunny. Highs 94 to 99. Variable less than 5 mph.
.THURSDAY NIGHT...Mostly clear. Lows 68 to 74. Variable less than
5 mph.
.FRIDAY...Sunny. Highs 96 to 101. Variable less than 5 mph.
.FRIDAY NIGHT...Mostly clear. Lows 70 to 75. Variable less than
5 mph.

...Central Valley and Delta
.TUESDAY NIGHT...Clear. Lows 55 to 60. Southwest winds 5 to
15 mph.
.WEDNESDAY...Sunny. Highs 93 to 98. Northwest winds 5 to 15 mph.
.WEDNESDAY NIGHT...Clear. Lows 61 to 66. West winds 5 to 15 mph.
.THURSDAY...Sunny. Highs 98 to 103. Northwest winds up to 10 mph.
.THURSDAY NIGHT...Mostly clear. Lows 62 to 68. Southwest winds up
to 10 mph.
.FRIDAY...Sunny. Highs 99 to 104. West winds up to 10 mph.
.FRIDAY NIGHT...Clear. Lows 62 to 70. Southwest winds up to
10 mph.

$$