


Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Sacramento, CA
Issued by NWS Sacramento, CA
466 FNUS56 KSTO 020731 FWFSTO Fire Weather Planning Forecast for Interior Northern California National Weather Service Sacramento CA 1230 AM PDT Tue Sep 2 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...Hot and dry conditions today with local daytime humidities in the low teens to 20s and poor overnight recovery. Continued diurnal, terrain driven winds with breezy onshore winds in the afternoons expected. Chances for quick, moving isolated showers begin early Tuesday morning, south of Interstate 80, with mountain showers and thunderstorms in the afternoon and evening over the Sierra and Southern Cascades through Wednesday, highest on Tuesday. CAZ213-030000- Eastern Portion of Shasta-Trinity NF- 1230 AM PDT Tue Sep 2 2025 .TODAY... * Sky/Weather............Partly cloudy in the morning then becoming mostly cloudy. * Max Temperature........98-103 lower elevations...except 87-97 higher elevations. * 24 HR Trend..........Little change. * Min Humidity...........17-22 percent. * 24 HR Trend..........6 percent up. * 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 5 to 11 mph shifting to the south up to 8 mph in the afternoon. * CWR....................0 percent. * Mixing Height..........8900 ft AGL. * Chance of thunder......6 percent. .TONIGHT... * Sky/Weather............Partly cloudy. * Min Temperature........65-70 lower elevations...except 57-67 higher elevations. * 24 HR Trend..........Little change. * Max Humidity...........50-65 percent. * 24 HR Trend..........14 percent up. * 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..........700 ft AGL. * Chance of thunder......8 percent. .WEDNESDAY... * Sky/Weather............Mostly sunny. * Max Temperature........95-100 lower elevations...except 85-95 higher elevations. * Min Humidity...........16-31 percent. * 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 up to 7 mph in the afternoon. * Mixing Height..........6400 ft AGL. * CWR....................0 percent. * Chance of thunder......2 percent. $$ CAZ214-030000- Burney Basin and Northeast Plateau in Shasta County Including Northwest Lassen NF north of Lassen NP- 1230 AM PDT Tue Sep 2 2025 .TODAY... * Sky/Weather............Partly cloudy in the morning then becoming mostly cloudy. * Max Temperature........92-97 lower elevations...except 86-91 higher elevations. * 24 HR Trend..........Little change. * Min Humidity...........19-24 percent. * 24 HR Trend..........5 percent up. * 20-Foot Winds.......... * Valleys/Lwr Slopes...Upslope winds up to 5 mph becoming southwest up to 8 mph with local gusts up to 20 mph in the afternoon. * Ridges/Upr Slopes....Variable winds up to 7 mph becoming south up to 8 mph with local gusts up to 20 mph in the afternoon. * CWR....................0 percent. * Mixing Height..........10100 ft AGL. * Chance of thunder......11 percent. .TONIGHT... * Sky/Weather............Mostly cloudy in the evening, then partly cloudy with a slight chance of showers after midnight. * Min Temperature........54-59. * 24 HR Trend..........Little change. * Max Humidity...........70-80 percent lower elevations...except 59-71 percent high elevations. * 24 HR Trend..........16 percent up. * 20-Foot Winds.......... * Valleys/Lwr Slopes...East winds up to 8 mph in the evening becoming drainage up to 5 mph. * Ridges/Upr Slopes....Southeast winds up to 8 mph. * CWR....................10 percent. * Mixing Height..........700 ft AGL. * Chance of thunder......11 percent. .WEDNESDAY... * Sky/Weather............Mostly sunny. * Max Temperature........91-96 lower elevations...except 84-90 higher elevations. * Min Humidity...........22-33 percent. * 20-Foot Winds.......... * Valleys/Lwr Slopes...Upslope winds up to 5 mph. * Ridges/Upr Slopes....Variable winds up to 7 mph becoming southwest up to 7 mph in the afternoon. * Mixing Height..........11100 ft AGL. * CWR....................0 percent. * Chance of thunder......4 percent. $$ CAZ215-030000- Northern Sacramento Valley to Southern Tehama County Line Below 1000 Ft- 1230 AM PDT Tue Sep 2 2025 .TODAY... * Sky/Weather............Partly cloudy. * Max Temperature........98-103. * 24 HR Trend..........Little change. * Min Humidity...........18-23 percent. * 24 HR Trend..........5 percent up. * 20-Foot Winds..........North winds 4 to 9 mph shifting to the south 5 to 11 mph with local gusts up to 20 mph in the afternoon. * CWR....................0 percent. * Mixing Height..........8500 ft AGL. * Chance of thunder......3 percent. .TONIGHT... * Sky/Weather............Mostly clear. * Min Temperature........66-71. * 24 HR Trend..........Little change. * Max Humidity...........53-67 percent. * 24 HR Trend..........19 percent up. * 20-Foot Winds..........Southeast winds up to 8 mph. * CWR....................0 percent. * Mixing Height..........600 ft AGL. * Chance of thunder......8 percent. .WEDNESDAY... * Sky/Weather............Mostly sunny. * Max Temperature........97-102. * Min Humidity...........16-31 percent. * 20-Foot Winds..........North winds up to 7 mph shifting to the south up to 8 mph in the afternoon. * Mixing Height..........4500 ft AGL. * CWR....................0 percent. * Chance of thunder......0 percent. $$ CAZ216-030000- Central Sacramento Valley in Glenn, Colusa, Yuba, Northern Sutter, and Butte County Below 1000 Ft- 1230 AM PDT Tue Sep 2 2025 .TODAY... * Sky/Weather............Partly cloudy. * Max Temperature........96-101. * 24 HR Trend..........Little change. * Min Humidity...........22-32 percent. * 24 HR Trend..........8 percent up. * 20-Foot Winds..........North winds up to 8 mph shifting to the southeast 5 to 10 mph with local gusts up to 20 mph in the afternoon. * CWR....................0 percent. * Mixing Height..........4400 ft AGL. * Chance of thunder......4 percent. .TONIGHT... * Sky/Weather............Mostly clear. * Min Temperature........62-67. * 24 HR Trend..........5 degrees cooler. * Max Humidity...........65-80 percent. * 24 HR Trend..........23 percent up. * 20-Foot Winds..........Southeast winds up to 8 mph. * CWR....................0 percent. * Mixing Height..........500 ft AGL. * Chance of thunder......6 percent. .WEDNESDAY... * Sky/Weather............Mostly sunny. * Max Temperature........94-99. * Min Humidity...........21-36 percent. * 20-Foot Winds..........Northeast winds up to 7 mph shifting to the south up to 8 mph in the afternoon. * Mixing Height..........3200 ft AGL. * CWR....................0 percent. * Chance of thunder......1 percent. $$ CAZ217-030000- Southern Sacramento Valley in Yolo- Sacramento Far Western Placer, southern Sutter and Solano County Below 1000 Ft- 1230 AM PDT Tue Sep 2 2025 .TODAY... * Sky/Weather............Partly cloudy in the morning, then partly cloudy with a slight chance of showers in the afternoon. * Max Temperature........97-102. * 24 HR Trend..........4 degrees cooler. * Min Humidity...........23-30 percent. * 24 HR Trend..........9 percent up. * 20-Foot Winds..........South winds 4 to 10 mph. Local gusts up to 20 mph in the afternoon. * CWR....................0 percent. * Mixing Height..........4100 ft AGL. * Chance of thunder......8 percent. .TONIGHT... * Sky/Weather............Mostly clear. * Min Temperature........59-64. * 24 HR Trend..........7 degrees cooler. * Max Humidity...........70-85 percent. * 24 HR Trend..........24 percent up. * 20-Foot Winds..........South winds 5 to 11 mph with local gusts up to 20 mph. * CWR....................0 percent. * Mixing Height..........600 ft AGL. * Chance of thunder......6 percent. .WEDNESDAY... * Sky/Weather............Mostly sunny. * Max Temperature........92-97. * Min Humidity...........20-35 percent. * 20-Foot Winds..........Southwest winds 4 to 10 mph. * Mixing Height..........3000 ft AGL. * CWR....................0 percent. * Chance of thunder......0 percent. $$ CAZ218-030000- Carquinez Strait and Delta- 1230 AM PDT Tue Sep 2 2025 .TODAY... * Sky/Weather............Partly cloudy in the morning then clearing. * Max Temperature........89-98. * 24 HR Trend..........6 degrees cooler. * Min Humidity...........30-38 percent. * 24 HR Trend..........14 percent up. * 20-Foot Winds..........West winds 6 to 12 mph with local gusts up to 25 mph. * CWR....................0 percent. * Mixing Height..........2500 ft AGL. * Chance of thunder......6 percent. .TONIGHT... * Sky/Weather............Mostly clear. * Min Temperature........59-64. * 24 HR Trend..........5 degrees cooler. * Max Humidity...........83-91 percent. * 24 HR Trend..........21 percent up. * 20-Foot Winds..........West winds 8 to 14 mph with local gusts up to 25 mph. * CWR....................0 percent. * Mixing Height..........800 ft AGL. * Chance of thunder......6 percent. .WEDNESDAY... * Sky/Weather............Mostly sunny. * Max Temperature........83-93. * Min Humidity...........46-61 percent. * 20-Foot Winds..........West winds 7 to 13 mph with local gusts up to 25 mph. * Mixing Height..........1900 ft AGL. * CWR....................0 percent. * Chance of thunder......0 percent. $$ CAZ219-030000- Northern San Joaquin Valley in San Joaquin and Stanislaus Counties Below 1000 ft- 1230 AM PDT Tue Sep 2 2025 .TODAY... * Sky/Weather............Partly cloudy in the morning then clearing. A slight chance of showers. * Max Temperature........97-102. * 24 HR Trend..........Little change. * Min Humidity...........24-30 percent. * 24 HR Trend..........9 percent up. * 20-Foot Winds..........West winds 5 to 11 mph. Local gusts up to 20 mph in the afternoon. * CWR....................10 percent. * Mixing Height..........4900 ft AGL. * Chance of thunder......10 percent. .TONIGHT... * Sky/Weather............Mostly clear. * Min Temperature........61-66. * 24 HR Trend..........7 degrees cooler. * Max Humidity...........61-76 percent. * 24 HR Trend..........21 percent up. * 20-Foot Winds..........Northwest winds 6 to 12 mph. * CWR....................0 percent. * Mixing Height..........700 ft AGL. * Chance of thunder......6 percent. .WEDNESDAY... * Sky/Weather............Mostly sunny. * Max Temperature........91-96. * Min Humidity...........19-34 percent. * 20-Foot Winds..........Northwest winds 4 to 9 mph. * Mixing Height..........3000 ft AGL. * CWR....................0 percent. * Chance of thunder......0 percent. $$ CAZ263-279-030000- Southeast Edge Shasta-Trinity NF and Western Portions of Tehama- Glenn Unit-Eastern Mendocino NF- 1230 AM PDT Tue Sep 2 2025 .TODAY... * Sky/Weather............Partly cloudy in the morning then clearing. * Max Temperature........97-102 lower elevations...except 81-91 higher elevations. * 24 HR Trend..........Little change. * Min Humidity...........19-24 percent. * 24 HR Trend..........5 percent up. * 20-Foot Winds.......... * Valleys/Lwr Slopes...East winds 5 to 11 mph with local gusts up to 20 mph. * Ridges/Upr Slopes....Southeast winds 5 to 11 mph. * CWR....................0 percent. * Mixing Height..........9100 ft AGL. * Chance of thunder......7 percent. .TONIGHT... * Sky/Weather............Mostly clear. * Min Temperature........69-74 lower elevations...except 61-67 higher elevations. * 24 HR Trend..........4 degrees cooler. * Max Humidity...........38-46 percent. * 24 HR Trend..........11 percent up. * 20-Foot Winds.......... * Valleys/Lwr Slopes...South winds up to 8 mph shifting to the northwest up to 7 mph after midnight. * Ridges/Upr Slopes....South winds up to 8 mph. * CWR....................0 percent. * Mixing Height..........600 ft AGL. * Chance of thunder......7 percent. .WEDNESDAY... * Sky/Weather............Mostly sunny. * Max Temperature........94-99 lower elevations...except 78-88 higher elevations. * Min Humidity...........16-31 percent. * 20-Foot Winds.......... * Valleys/Lwr Slopes...Northwest winds up to 8 mph shifting to the southeast in the afternoon. * Ridges/Upr Slopes....North winds up to 8 mph shifting to the southeast 4 to 9 mph in the afternoon. * Mixing Height..........5300 ft AGL. * CWR....................0 percent. * Chance of thunder......1 percent. $$ CAZ266-030000- Northern Sierra Foothills from 1000 to 3000 Ft. Includes portions of Shasta-Trinity and Butte Units- 1230 AM PDT Tue Sep 2 2025 .TODAY... * Sky/Weather............Partly cloudy in the morning then becoming mostly cloudy. * Max Temperature........92-98. * 24 HR Trend..........Little change. * Min Humidity...........20-26 percent. * 24 HR Trend..........6 percent up. * 20-Foot Winds.......... * Valleys/Lwr Slopes...East winds 7 to 13 mph shifting to the south 4 to 9 mph in the afternoon. * Ridges/Upr Slopes....East winds 6 to 12 mph shifting to the south up to 8 mph in the afternoon. * CWR....................0 percent. * Mixing Height..........8000 ft AGL. * Chance of thunder......8 percent. .TONIGHT... * Sky/Weather............Partly cloudy. * Min Temperature........66-71. * 24 HR Trend..........5 degrees cooler. * Max Humidity...........44-57 percent. * 24 HR Trend..........15 percent up. * 20-Foot Winds.......... * Valleys/Lwr Slopes...East winds 4 to 10 mph. * Ridges/Upr Slopes....East winds 4 to 10 mph. * CWR....................0 percent. * Mixing Height..........500 ft AGL. * Chance of thunder......10 percent. .WEDNESDAY... * Sky/Weather............Mostly sunny. * Max Temperature........92-97 lower elevations...except 87-93 higher elevations. * Min Humidity...........23-38 percent. * 20-Foot Winds.......... * Valleys/Lwr Slopes...Northeast winds 6 to 12 mph shifting to the southwest up to 7 mph in the afternoon. * Ridges/Upr Slopes....Northeast winds 5 to 11 mph in the morning becoming variable up to 5 mph. * Mixing Height..........3900 ft AGL. * CWR....................0 percent. * Chance of thunder......1 percent. $$ CAZ220-267-030000- Southern Motherlode From 1000 to 3000 Ft. Includes portions of Toulumne-Calaveras Unit- Northern Motherlode From 1000 to 3000 Ft. Includes portions of Nevada-Yuba-Placer-Amador and Eldorado Units- 1230 AM PDT Tue Sep 2 2025 .TODAY... * Sky/Weather............Partly cloudy. Areas of smoke in the morning. A slight chance of showers in the morning, then a slight chance of showers and thunderstorms in the afternoon. * Max Temperature........93-98. * 24 HR Trend..........Little change. * Min Humidity...........23-28 percent. * 24 HR Trend..........8 percent up. * 20-Foot Winds.......... * Valleys/Lwr Slopes...South winds up to 8 mph. * Ridges/Upr Slopes....South winds up to 8 mph. * CWR....................10 percent. * Mixing Height..........4900 ft AGL. * Chance of thunder......17 percent. .TONIGHT... * Sky/Weather............Mostly clear. * Min Temperature........64-70. * 24 HR Trend..........5 degrees cooler. * Max Humidity...........49-59 percent. * 24 HR Trend..........16 percent up. * 20-Foot Winds.......... * Valleys/Lwr Slopes...Southwest winds up to 8 mph shifting to the east up to 7 mph after midnight. * Ridges/Upr Slopes....Southeast winds up to 8 mph. * CWR....................0 percent. * Mixing Height..........500 ft AGL. * Chance of thunder......9 percent. .WEDNESDAY... * Sky/Weather............Mostly sunny. * Max Temperature........89-94. * Min Humidity...........20-33 percent. * 20-Foot Winds.......... * Valleys/Lwr Slopes...Upslope winds up to 5 mph becoming west up to 8 mph in the afternoon. * Ridges/Upr Slopes....East winds up to 7 mph shifting to the west up to 8 mph in the afternoon. * Mixing Height..........4000 ft AGL. * CWR....................0 percent. * Chance of thunder......2 percent. $$ CAZ268-030000- 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 Tue Sep 2 2025 .TODAY... * Sky/Weather............Partly cloudy in the morning, then mostly cloudy with a slight chance of showers in the afternoon. * Max Temperature........84-90 lower elevations...except 77-84 higher elevations. * 24 HR Trend..........Little change. * Min Humidity...........22-29 percent. * 24 HR Trend..........4 percent up. * 20-Foot Winds.......... * Valleys/Lwr Slopes...Southeast winds 5 to 11 mph. * Ridges/Upr Slopes....Southeast winds 5 to 11 mph. * CWR....................0 percent. * Mixing Height..........8100 ft AGL. * Chance of thunder......15 percent. .TONIGHT... * Sky/Weather............Partly cloudy. * Min Temperature........53-63. * 24 HR Trend..........Little change. * Max Humidity...........53-68 percent...except 79-94 percent in the high mountain valleys. * 24 HR Trend..........16 percent up. * 20-Foot Winds.......... * Valleys/Lwr Slopes...East winds 5 to 11 mph. * Ridges/Upr Slopes....East winds 5 to 11 mph. * CWR....................10 percent. * Mixing Height..........300 ft AGL. * Chance of thunder......13 percent. .WEDNESDAY... * Sky/Weather............Mostly sunny. * Max Temperature........82-88 lower elevations...except 76-84 higher elevations. * Min Humidity...........25-40 percent. * 20-Foot Winds.......... * Valleys/Lwr Slopes...Northeast winds 5 to 11 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..........8100 ft AGL. * CWR....................0 percent. * Chance of thunder......4 percent. $$ CAZ221-269-030000- Stanislaus NF West of the Sierra Crest- Northern Sierra Including the Tahoe and Eldorado NF/S West of the Sierra Crest- 1230 AM PDT Tue Sep 2 2025 .TODAY... * Sky/Weather............Partly cloudy. A slight chance of showers in the morning, then a chance of showers and a slight chance of thunderstorms in the afternoon. Areas of smoke through the day. * Max Temperature........88-94 lower elevations...except 74-84 higher elevations. * 24 HR Trend..........Little change. * Min Humidity...........23-31 percent. * 24 HR Trend..........6 percent up. * 20-Foot Winds.......... * Valleys/Lwr Slopes...South winds 4 to 10 mph. * Ridges/Upr Slopes....South winds 4 to 10 mph. * CWR....................10 percent. * Mixing Height..........7500 ft AGL. * Chance of thunder......23 percent. .TONIGHT... * Sky/Weather............Partly cloudy. At higher elevations, a slight chance of showers and thunderstorms in the evening. * Min Temperature........62-69 lower elevations...except 51-61 higher elevations. * 24 HR Trend..........Little change. * Max Humidity...........46-61 percent lower elevations...except 57-72 percent high elevations. * 24 HR Trend..........16 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..........300 ft AGL. * Chance of thunder......15 percent. .WEDNESDAY... * 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........85-91 lower elevations...except 72-82 higher elevations. * Min Humidity...........27-42 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 5 to 11 mph shifting to the southwest up to 8 mph in the afternoon. * Mixing Height..........6400 ft AGL. * CWR....................0 percent. * Chance of thunder......7 percent. $$ .Extended... ...Shasta County Mountains and Coastal Range .WEDNESDAY NIGHT...Mostly clear. Lows 58 to 68. West winds up to 10 mph. .THURSDAY...Mostly sunny. Highs 82 to 92. Southeast winds up to 10 mph. .THURSDAY NIGHT...Cooler. Mostly clear. Lows 53 to 63. West winds up to 10 mph. .FRIDAY...Mostly sunny. Highs 75 to 85. Southwest winds up to 10 mph. .FRIDAY NIGHT...Mostly clear. Lows 51 to 61. Variable less than 5 mph. .SATURDAY...Mostly sunny. Highs 72 to 82. South winds up to 10 mph. .SATURDAY NIGHT...Mostly clear. Lows 50 to 60. Variable less than 5 mph. ...Northern Sierra and Lassen Park .WEDNESDAY NIGHT...Mostly clear. Lows 58 to 68. Northeast winds up to 10 mph. .THURSDAY...Mostly sunny. Highs 82 to 91. Southwest winds up to 10 mph. .THURSDAY NIGHT...Mostly clear. Lows 54 to 64. Northeast winds up to 10 mph. .FRIDAY...Mostly sunny. Highs 77 to 86. Southwest winds up to 10 mph. .FRIDAY NIGHT...Mostly clear. Lows 51 to 61. Variable less than 5 mph. .SATURDAY...Mostly sunny. Highs 73 to 82. South winds up to 10 mph. .SATURDAY NIGHT...Mostly clear. Lows 49 to 59. Variable less than 5 mph. ...Sierra Nevada Foothills .WEDNESDAY NIGHT...Mostly clear. Lows 66 to 72. East winds up to 10 mph. .THURSDAY...Mostly sunny. Highs 88 to 93. Southwest winds up to 10 mph. .THURSDAY NIGHT...Mostly clear. Lows 61 to 66. East winds up to 10 mph. .FRIDAY...Mostly sunny. Highs 83 to 88. Southwest winds up to 10 mph. .FRIDAY NIGHT...Mostly clear. Lows 59 to 64. Variable less than 5 mph. .SATURDAY...Sunny. Highs 80 to 85. Southwest winds up to 10 mph. .SATURDAY NIGHT...Mostly clear. Lows 58 to 63. Variable less than 5 mph. ...Central Valley and Delta .WEDNESDAY NIGHT...Clear. Lows 59 to 66. Southwest winds 5 to 15 mph. .THURSDAY...Mostly sunny. Highs 91 to 96. Southwest winds 5 to 15 mph. .THURSDAY NIGHT...Mostly clear. Lows 58 to 63. South winds 5 to 15 mph. .FRIDAY...Mostly sunny. Highs 86 to 91. Southwest winds up to 10 mph. .FRIDAY NIGHT...Mostly clear. Lows 57 to 62. South winds up to 10 mph. .SATURDAY...Sunny. Highs 85 to 90. Southwest winds up to 10 mph. .SATURDAY NIGHT...Clear. Lows 57 to 62. South winds up to 10 mph. $$