


Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Sacramento, CA
Issued by NWS Sacramento, CA
653 FNUS56 KSTO 220730 FWFSTO Fire Weather Planning Forecast for Interior Northern California National Weather Service Sacramento CA 1230 AM PDT Fri Aug 22 2025 NOTE: THIS PRODUCT HAS UPDATED FORECAST DATA BUT THE FORECAST DISCUSSION IS FROM THE PREVIOUS DAY. ...Hot and Dry Conditions Bring Elevated Fire Weather Concerns on Thursday and Friday and Mountain Thunderstorms Expected Friday through the Weekend... .DISCUSSION... Hot and dry conditions continue today with poor to moderate overnight recovery and daytime humidities in the teens for the northern Sacramento Valley and Valley foothills. Isolated mountain chances begin Friday and increase this weekend into early next week, primarily over the Sierra and Southern Cascades. CAZ213-230000- Eastern Portion of Shasta-Trinity NF- 1230 AM PDT Fri Aug 22 2025 .TODAY... * Sky/Weather............Mostly sunny. * Max Temperature........100-105 lower elevations...except 90-99 higher elevations. * 24 HR Trend..........Little change. * Min Humidity...........7-12 percent. * 24 HR Trend..........Little change. * 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 4 to 9 mph in the afternoon. * CWR....................0 percent. * Mixing Height..........6600 ft AGL. * Chance of thunder......0 percent. .TONIGHT... * Sky/Weather............Partly cloudy. * Min Temperature........70-75 lower elevations...except 60-70 higher elevations. * 24 HR Trend..........Little change. * Max Humidity...........25-37 percent. * 24 HR Trend..........7 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. .SATURDAY... * Sky/Weather............Partly cloudy then becoming mostly sunny early in the afternoon then becoming partly cloudy. * Max Temperature........99-104 lower elevations...except 88-98 higher elevations. * Min Humidity...........12-21 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..........5700 ft AGL. * CWR....................0 percent. * Chance of thunder......1 percent. $$ CAZ214-230000- Burney Basin and Northeast Plateau in Shasta County Including Northwest Lassen NF north of Lassen NP- 1230 AM PDT Fri Aug 22 2025 .TODAY... * Sky/Weather............Mostly sunny. * Max Temperature........95-100 lower elevations...except 89-94 higher elevations. * 24 HR Trend..........Little change. * Min Humidity...........11-16 percent. * 24 HR Trend..........Little change. * 20-Foot Winds.......... * Valleys/Lwr Slopes...Upslope winds up to 5 mph becoming west 4 to 9 mph with local gusts up to 20 mph in the afternoon. * Ridges/Upr Slopes....Variable winds up to 7 mph becoming west 4 to 9 mph with local gusts up to 20 mph in the afternoon. * CWR....................0 percent. * Mixing Height..........8200 ft AGL. * Chance of thunder......0 percent. .TONIGHT... * Sky/Weather............Mostly clear. * Min Temperature........57-63. * 24 HR Trend..........4 degrees warmer. * Max Humidity...........36-41 percent. * 24 HR Trend..........6 percent down. * 20-Foot Winds.......... * Valleys/Lwr Slopes...Southwest winds up to 8 mph with local gusts up to 20 mph in the evening becoming drainage up to 5 mph. * Ridges/Upr Slopes....Southwest winds 4 to 9 mph with local gusts up to 20 mph in the evening becoming variable up to 5 mph. * CWR....................0 percent. * Mixing Height..........700 ft AGL. * Chance of thunder......0 percent. .SATURDAY... * Sky/Weather............Partly cloudy then becoming mostly cloudy late in the morning then becoming mostly sunny. * Max Temperature........93-98 lower elevations...except 87-93 higher elevations. * Min Humidity...........15-23 percent. * 20-Foot Winds.......... * Valleys/Lwr Slopes...Upslope winds up to 5 mph becoming west up to 7 mph in the afternoon. * Ridges/Upr Slopes....Variable winds up to 7 mph becoming west up to 8 mph in the afternoon. * Mixing Height..........7300 ft AGL. * CWR....................0 percent. * Chance of thunder......1 percent. $$ CAZ215-230000- Northern Sacramento Valley to Southern Tehama County Line Below 1000 Ft- 1230 AM PDT Fri Aug 22 2025 .TODAY... * Sky/Weather............Mostly sunny. * Max Temperature........102-107. * 24 HR Trend..........Little change. * Min Humidity...........10-16 percent. * 24 HR Trend..........Little change. * 20-Foot Winds..........North winds up to 7 mph shifting to the south 4 to 10 mph in the afternoon. * CWR....................0 percent. * Mixing Height..........6300 ft AGL. * Chance of thunder......0 percent. .TONIGHT... * Sky/Weather............Mostly clear. * Min Temperature........70-75. * 24 HR Trend..........Little change. * Max Humidity...........31-42 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......0 percent. .SATURDAY... * Sky/Weather............Partly cloudy until late afternoon then clearing. * Max Temperature........101-106. * Min Humidity...........12-23 percent. * 20-Foot Winds..........North winds up to 6 mph shifting to the south up to 8 mph in the afternoon. * Mixing Height..........5000 ft AGL. * CWR....................0 percent. * Chance of thunder......0 percent. $$ CAZ216-230000- Central Sacramento Valley in Glenn, Colusa, Yuba, Northern Sutter, and Butte County Below 1000 Ft- 1230 AM PDT Fri Aug 22 2025 .TODAY... * Sky/Weather............Mostly sunny. * Max Temperature........99-104. * 24 HR Trend..........Little change. * Min Humidity...........17-24 percent. * 24 HR Trend..........Little change. * 20-Foot Winds..........North winds up to 7 mph shifting to the south 4 to 9 mph in the afternoon. * CWR....................0 percent. * Mixing Height..........4200 ft AGL. * Chance of thunder......0 percent. .TONIGHT... * Sky/Weather............Mostly clear. * Min Temperature........67-73. * 24 HR Trend..........Little change. * Max Humidity...........42-57 percent. * 24 HR Trend..........6 percent down. * 20-Foot Winds..........Southeast winds up to 7 mph. * CWR....................0 percent. * Mixing Height..........500 ft AGL. * Chance of thunder......0 percent. .SATURDAY... * Sky/Weather............Partly cloudy early in the morning then clearing. * Max Temperature........98-103. * Min Humidity...........14-29 percent. * 20-Foot Winds..........Northeast winds up to 6 mph shifting to the south up to 8 mph in the afternoon. * Mixing Height..........3900 ft AGL. * CWR....................0 percent. * Chance of thunder......1 percent. $$ CAZ217-230000- Southern Sacramento Valley in Yolo- Sacramento Far Western Placer, southern Sutter and Solano County Below 1000 Ft- 1230 AM PDT Fri Aug 22 2025 .TODAY... * Sky/Weather............Mostly sunny. * Max Temperature........100-105. * 24 HR Trend..........Little change. * Min Humidity...........14-19 percent. * 24 HR Trend..........Little change. * 20-Foot Winds..........Southwest winds up to 8 mph. * CWR....................0 percent. * Mixing Height..........4200 ft AGL. * Chance of thunder......0 percent. .TONIGHT... * Sky/Weather............Partly cloudy. * Min Temperature........63-70. * 24 HR Trend..........Little change. * Max Humidity...........52-67 percent. * 24 HR Trend..........Little change. * 20-Foot Winds..........South winds 4 to 9 mph. * CWR....................0 percent. * Mixing Height..........500 ft AGL. * Chance of thunder......1 percent. .SATURDAY... * Sky/Weather............Partly cloudy early in the morning then clearing. * Max Temperature........98-103. * Min Humidity...........16-31 percent. * 20-Foot Winds..........South winds 4 to 9 mph. * Mixing Height..........3600 ft AGL. * CWR....................0 percent. * Chance of thunder......1 percent. $$ CAZ218-230000- Carquinez Strait and Delta- 1230 AM PDT Fri Aug 22 2025 .TODAY... * Sky/Weather............Mostly sunny. * Max Temperature........92-100. * 24 HR Trend..........Little change. * Min Humidity...........20-31 percent. * 24 HR Trend..........Little change. * 20-Foot Winds..........West winds 6 to 12 mph. * CWR....................0 percent. * Mixing Height..........2400 ft AGL. * Chance of thunder......0 percent. .TONIGHT... * Sky/Weather............Partly cloudy. * Min Temperature........60-65. * 24 HR Trend..........Little change. * Max Humidity...........67-82 percent. * 24 HR Trend..........Little change. * 20-Foot Winds..........West winds 7 to 13 mph with local gusts up to 25 mph. * CWR....................0 percent. * Mixing Height..........500 ft AGL. * Chance of thunder......0 percent. .SATURDAY... * Sky/Weather............Mostly cloudy early in the morning then clearing. * Max Temperature........87-97. * Min Humidity...........42-57 percent. * 20-Foot Winds..........West winds 7 to 13 mph with local gusts up to 25 mph. * Mixing Height..........1800 ft AGL. * CWR....................0 percent. * Chance of thunder......0 percent. $$ CAZ219-230000- Northern San Joaquin Valley in San Joaquin and Stanislaus Counties Below 1000 ft- 1230 AM PDT Fri Aug 22 2025 .TODAY... * Sky/Weather............Mostly sunny. * Max Temperature........99-104. * 24 HR Trend..........Little change. * Min Humidity...........15-20 percent. * 24 HR Trend..........Little change. * 20-Foot Winds..........Northwest winds 5 to 11 mph. * CWR....................0 percent. * Mixing Height..........3800 ft AGL. * Chance of thunder......0 percent. .TONIGHT... * Sky/Weather............Mostly clear. * Min Temperature........66-72. * 24 HR Trend..........Little change. * Max Humidity...........43-58 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......1 percent. .SATURDAY... * Sky/Weather............Mostly sunny. * Max Temperature........97-102. * Min Humidity...........16-29 percent. * 20-Foot Winds..........Northwest winds 4 to 10 mph. * Mixing Height..........3600 ft AGL. * CWR....................0 percent. * Chance of thunder......1 percent. $$ CAZ263-279-230000- Southeast Edge Shasta-Trinity NF and Western Portions of Tehama- Glenn Unit-Eastern Mendocino NF- 1230 AM PDT Fri Aug 22 2025 .TODAY... * Sky/Weather............Mostly sunny in the morning then becoming partly cloudy. * Max Temperature........99-104 lower elevations...except 84-94 higher elevations. * 24 HR Trend..........Little change. * Min Humidity...........12-17 percent. * 24 HR Trend..........Little change. * 20-Foot Winds.......... * Valleys/Lwr Slopes...East winds 4 to 9 mph. * Ridges/Upr Slopes....Southeast winds 4 to 9 mph. * CWR....................0 percent. * Mixing Height..........6300 ft AGL. * Chance of thunder......0 percent. .TONIGHT... * Sky/Weather............Mostly clear. * Min Temperature........74-79 lower elevations...except 67-73 higher elevations. * 24 HR Trend..........Little change. * Max Humidity...........24-29 percent. * 24 HR Trend..........7 percent down. * 20-Foot Winds.......... * Valleys/Lwr Slopes...West winds up to 8 mph. * Ridges/Upr Slopes....West winds up to 8 mph. * CWR....................0 percent. * Mixing Height..........600 ft AGL. * Chance of thunder......0 percent. .SATURDAY... * Sky/Weather............Partly cloudy. * Max Temperature........99-104 lower elevations...except 83-93 higher elevations. * Min Humidity...........13-25 percent. * 20-Foot Winds.......... * Valleys/Lwr Slopes...Northwest winds up to 7 mph shifting to the southeast up to 8 mph in the afternoon. * Ridges/Upr Slopes....Northwest winds up to 7 mph shifting to the southeast 5 to 11 mph in the afternoon. * Mixing Height..........4900 ft AGL. * CWR....................0 percent. * Chance of thunder......1 percent. $$ CAZ266-230000- Northern Sierra Foothills from 1000 to 3000 Ft. Includes portions of Shasta-Trinity and Butte Units- 1230 AM PDT Fri Aug 22 2025 .TODAY... * Sky/Weather............Mostly sunny. * Max Temperature........98-103 lower elevations...except 93-98 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 6 to 12 mph shifting to the southwest 4 to 9 mph with local gusts up to 20 mph in the afternoon. * Ridges/Upr Slopes....Northeast winds 4 to 10 mph shifting to the southwest up to 8 mph in the afternoon. * CWR....................0 percent. * Mixing Height..........5600 ft AGL. * Chance of thunder......0 percent. .TONIGHT... * Sky/Weather............Mostly clear. * Min Temperature........71-78. * 24 HR Trend..........Little change. * Max Humidity...........27-34 percent. * 24 HR Trend..........Little change. * 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......1 percent. .SATURDAY... * Sky/Weather............Mostly cloudy then becoming partly cloudy late in the morning then becoming mostly sunny. * Max Temperature........97-102 lower elevations...except 92-98 higher elevations. * Min Humidity...........14-29 percent. * 20-Foot Winds.......... * Valleys/Lwr Slopes...East 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 up to 7 mph in the afternoon. * Mixing Height..........5400 ft AGL. * CWR....................0 percent. * Chance of thunder......1 percent. $$ CAZ220-267-230000- Southern Motherlode From 1000 to 3000 Ft. Includes portions of Toulumne-Calaveras Unit- Northern Motherlode From 1000 to 3000 Ft. Includes portions of Nevada-Yuba-Placer-Amador and Eldorado Units- 1230 AM PDT Fri Aug 22 2025 .TODAY... * Sky/Weather............Mostly sunny. * Max Temperature........96-101. * 24 HR Trend..........Little change. * Min Humidity...........13-18 percent. * 24 HR Trend..........Little change. * 20-Foot Winds.......... * Valleys/Lwr Slopes...East winds up to 7 mph shifting to the west up to 8 mph in the afternoon. * Ridges/Upr Slopes....Southeast winds up to 7 mph shifting to the southwest up to 8 mph in the afternoon. * CWR....................0 percent. * Mixing Height..........5100 ft AGL. * Chance of thunder......2 percent. .TONIGHT... * Sky/Weather............Mostly clear. * Min Temperature........70-75. * 24 HR Trend..........Little change. * Max Humidity...........37-42 percent. * 24 HR Trend..........Little change. * 20-Foot Winds.......... * Valleys/Lwr Slopes...Northwest winds up to 7 mph shifting to the northeast after midnight. * Ridges/Upr Slopes....North winds up to 7 mph in the evening becoming variable up to 5 mph. * CWR....................0 percent. * Mixing Height..........500 ft AGL. * Chance of thunder......2 percent. .SATURDAY... * Sky/Weather............Mostly sunny. * Max Temperature........95-100. * Min Humidity...........14-25 percent. * 20-Foot Winds.......... * Valleys/Lwr Slopes...East winds up to 7 mph shifting to the west in the afternoon. * Ridges/Upr Slopes....East winds up to 7 mph shifting to the southwest up to 8 mph in the afternoon. * Mixing Height..........5200 ft AGL. * CWR....................0 percent. * Chance of thunder......4 percent. $$ CAZ268-230000- 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 Fri Aug 22 2025 .TODAY... * Sky/Weather............Mostly sunny. * Max Temperature........88-95 lower elevations...except 81-88 higher elevations. * 24 HR Trend..........Little change. * Min Humidity...........13-18 percent. * 24 HR Trend..........Little change. * 20-Foot Winds.......... * Valleys/Lwr Slopes...East winds 4 to 10 mph shifting to the southwest in the afternoon. * Ridges/Upr Slopes....South winds 5 to 11 mph. * CWR....................0 percent. * Mixing Height..........6500 ft AGL. * Chance of thunder......1 percent. .TONIGHT... * Sky/Weather............Mostly clear. * Min Temperature........59-69. * 24 HR Trend..........4 degrees warmer. * Max Humidity...........28-41 percent...except 43-56 percent in the high mountain valleys. * 24 HR Trend..........Little change. * 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..........300 ft AGL. * Chance of thunder......1 percent. .SATURDAY... * Sky/Weather............Partly cloudy early in the morning then clearing. * Max Temperature........87-93 lower elevations...except 80-88 higher elevations. * Min Humidity...........15-30 percent. * 20-Foot Winds.......... * Valleys/Lwr Slopes...East 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 4 to 9 mph in the afternoon. * Mixing Height..........7600 ft AGL. * CWR....................0 percent. * Chance of thunder......5 percent. $$ CAZ221-269-230000- Stanislaus NF West of the Sierra Crest- Northern Sierra Including the Tahoe and Eldorado NF/S West of the Sierra Crest- 1230 AM PDT Fri Aug 22 2025 .TODAY... * Sky/Weather............Mostly sunny. * Max Temperature........92-98 lower elevations...except 79-89 higher elevations. * 24 HR Trend..........Little change. * Min Humidity...........17-23 percent. * 24 HR Trend..........Little change. * 20-Foot Winds.......... * Valleys/Lwr Slopes...Southeast winds up to 8 mph shifting to the southwest in the afternoon. * Ridges/Upr Slopes....South winds 4 to 10 mph. * CWR....................0 percent. * Mixing Height..........6400 ft AGL. * Chance of thunder......5 percent. .TONIGHT... * Sky/Weather............Mostly clear. * Min Temperature........66-75 lower elevations...except 56-66 higher elevations. * 24 HR Trend..........Little change. * Max Humidity...........38-53 percent. * 24 HR Trend..........6 percent up. * 20-Foot Winds.......... * Valleys/Lwr Slopes...Northeast winds up to 7 mph shifting to the east after midnight. * Ridges/Upr Slopes....Southeast winds up to 8 mph. * CWR....................0 percent. * Mixing Height..........300 ft AGL. * Chance of thunder......5 percent. .SATURDAY... * Sky/Weather............Mostly sunny in the morning then becoming partly cloudy. At higher elevations, a slight chance of showers in the morning, then a chance of showers and a slight chance of thunderstorms in the afternoon. At lower elevations, a slight chance of showers in the afternoon. * Max Temperature........91-97 lower elevations...except 77-87 higher elevations. * Min Humidity...........21-36 percent. * 20-Foot Winds.......... * Valleys/Lwr Slopes...East winds up to 7 mph shifting to the southwest up to 8 mph in the afternoon. * Ridges/Upr Slopes....East winds up to 8 mph shifting to the southwest 4 to 9 mph in the afternoon. * Mixing Height..........7100 ft AGL. * CWR....................0 percent. * Chance of thunder......13 percent. $$ .Extended... ...Shasta County Mountains and Coastal Range .SATURDAY NIGHT...Mostly clear. Lows 61 to 71. West winds up to 10 mph. .SUNDAY...Mostly sunny. Highs 86 to 96. Southeast winds up to 10 mph. .SUNDAY NIGHT...Mostly clear. Lows 60 to 70. West winds up to 10 mph. .MONDAY...Mostly sunny. Highs 86 to 96. East winds up to 10 mph. .MONDAY NIGHT...Partly cloudy with a slight chance of showers. Lows 59 to 69. Variable less than 5 mph. .TUESDAY...Partly cloudy with a slight chance of showers. Highs 85 to 95. Variable less than 5 mph. .TUESDAY NIGHT...Partly cloudy with a slight chance of showers. Lows 58 to 68. Variable less than 5 mph. ...Northern Sierra and Lassen Park .SATURDAY NIGHT...Partly cloudy with a slight chance of showers. Lows 60 to 70. East winds up to 10 mph. .SUNDAY...Partly cloudy with a slight chance of showers. Highs 86 to 95. Southwest winds up to 10 mph. .SUNDAY NIGHT...Mostly clear. Lows 59 to 69. Northeast winds up to 10 mph. .MONDAY...Partly cloudy with a slight chance of showers and thunderstorms. Highs 85 to 94. Variable less than 5 mph. .MONDAY NIGHT...Partly cloudy with a slight chance of showers. Lows 58 to 68. Variable less than 5 mph. .TUESDAY...Partly cloudy with a slight chance of showers. Highs 84 to 92. Variable less than 5 mph. .TUESDAY NIGHT...Partly cloudy with a slight chance of showers. Lows 57 to 67. Variable less than 5 mph. ...Sierra Nevada Foothills .SATURDAY NIGHT...Mostly clear. Lows 68 to 74. East winds up to 10 mph. .SUNDAY...Mostly sunny. Highs 93 to 98. Southwest winds up to 10 mph. .SUNDAY NIGHT...Clear. Lows 67 to 73. East winds up to 10 mph. .MONDAY...Partly cloudy with a slight chance of showers. Highs 92 to 97. Variable less than 5 mph. .MONDAY NIGHT...Mostly clear. Lows 67 to 73. Variable less than 5 mph. .TUESDAY...Partly cloudy with a slight chance of showers. Highs 91 to 96. Variable less than 5 mph. .TUESDAY NIGHT...Partly cloudy with a slight chance of showers. Lows 65 to 71. Variable less than 5 mph. ...Central Valley and Delta .SATURDAY NIGHT...Mostly clear. Lows 61 to 68. Southwest winds 5 to 15 mph. .SUNDAY...Sunny. Highs 95 to 100. Southwest winds 5 to 15 mph. .SUNDAY NIGHT...Clear. Lows 60 to 67. Southwest winds 5 to 15 mph. .MONDAY...Sunny. Highs 95 to 100. Southwest winds up to 10 mph. .MONDAY NIGHT...Clear. Lows 60 to 67. Southwest winds up to 10 mph. .TUESDAY...Mostly sunny. Highs 94 to 99. Southwest winds up to 10 mph. .TUESDAY NIGHT...Mostly clear. Lows 60 to 66. Southwest winds up to 10 mph. $$