


Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Sacramento, CA
Issued by NWS Sacramento, CA
596 FNUS56 KSTO 160731 FWFSTO Fire Weather Planning Forecast for Interior Northern California National Weather Service Sacramento CA 1230 AM PDT Sat Aug 16 2025 NOTE: THIS PRODUCT HAS UPDATED FORECAST DATA BUT THE FORECAST DISCUSSION IS FROM THE PREVIOUS DAY. ...Slight chance of thunderstorms on Saturday and Sunday, including Saturday night, in the vicinity of Shasta County... .DISCUSSION... Near to below normal temperatures continue across the region through the weekend with periodically breezy onshore flow and higher relative humidity. There is a 15-35% chance of showers or thunderstorms over the Coast Range, southern Cascades, Shasta County mountains and the northern Sacramento Valley on Saturday and Sunday, including overnight on Saturday. Thunderstorms will mostly be wet but fire starts are possible outside of the main precipitation cores. A gradual warming and drying trend is favored for next week. CAZ213-170000- Eastern Portion of Shasta-Trinity NF- 1230 AM PDT Sat Aug 16 2025 .TODAY... * Sky/Weather............Partly cloudy in the morning, then mostly cloudy with a chance of showers and a slight chance of thunderstorms in the afternoon. * Max Temperature........87-92 lower elevations...except 76-86 higher elevations. * 24 HR Trend..........8 degrees cooler. * Min Humidity...........36-50 percent. * 24 HR Trend..........20 percent up. * 20-Foot Winds.......... * Valleys/Lwr Slopes...Upslope winds up to 5 mph becoming southwest up to 7 mph in the afternoon. * Ridges/Upr Slopes....Northeast winds up to 7 mph shifting to the southwest 4 to 9 mph with local gusts up to 20 mph in the afternoon. * CWR....................10 percent. * Mixing Height..........6500 ft AGL. * Chance of thunder......25 percent. .TONIGHT... * Sky/Weather............Mostly cloudy. A chance of showers and a slight chance of thunderstorms in the evening, then a slight chance of showers after midnight. * Min Temperature........61-67 lower elevations...except 54-61 higher elevations. * 24 HR Trend..........Little change. * Max Humidity...........83-98 percent. * 24 HR Trend..........18 percent up. * 20-Foot Winds.......... * Valleys/Lwr Slopes...Northwest winds up to 7 mph in the evening becoming drainage up to 5 mph. * Ridges/Upr Slopes....Northwest winds up to 8 mph in the evening becoming variable up to 5 mph. * CWR....................20 percent. * Mixing Height..........800 ft AGL. * Chance of thunder......25 percent. .SUNDAY... * Sky/Weather............Mostly cloudy then becoming partly cloudy early in the afternoon then becoming mostly sunny. At higher elevations, a slight chance of showers until late afternoon, then a slight chance of showers and thunderstorms late in the afternoon. * Max Temperature........83-88 lower elevations...except 72-82 higher elevations. * Min Humidity...........40-55 percent. * 20-Foot Winds.......... * Valleys/Lwr Slopes...Upslope winds up to 5 mph becoming south up to 8 mph in the afternoon. * Ridges/Upr Slopes....Variable winds up to 7 mph becoming southwest 4 to 9 mph with local gusts up to 20 mph in the afternoon. * Mixing Height..........5100 ft AGL. * CWR....................10 percent. * Chance of thunder......9 percent. $$ CAZ214-170000- Burney Basin and Northeast Plateau in Shasta County Including Northwest Lassen NF north of Lassen NP- 1230 AM PDT Sat Aug 16 2025 .TODAY... * Sky/Weather............Mostly sunny. A slight chance of showers and thunderstorms in the afternoon. * Max Temperature........82-87 lower elevations...except 76-81 higher elevations. * 24 HR Trend..........6 degrees cooler. * Min Humidity...........36-41 percent. * 24 HR Trend..........18 percent up. * 20-Foot Winds.......... * Valleys/Lwr Slopes...Upslope winds up to 5 mph becoming west 5 to 11 mph in the afternoon. * Ridges/Upr Slopes....Variable winds up to 7 mph becoming west 5 to 11 mph with local gusts up to 25 mph in the afternoon. * CWR....................0 percent. * Mixing Height..........7500 ft AGL. * Chance of thunder......24 percent. .TONIGHT... * Sky/Weather............Mostly cloudy with a chance of showers and a slight chance of thunderstorms. * Min Temperature........56-61 lower elevations...except 49-57 higher elevations. * 24 HR Trend..........Little change. * Max Humidity...........92-100 percent. * 24 HR Trend..........18 percent up. * 20-Foot Winds.......... * Valleys/Lwr Slopes...West winds 4 to 9 mph with local gusts up to 20 mph in the evening becoming drainage up to 5 mph. * Ridges/Upr Slopes....West winds up to 8 mph with local gusts up to 20 mph in the evening becoming variable up to 5 mph. * CWR....................10 percent. * Mixing Height..........1300 ft AGL. * Chance of thunder......24 percent. .SUNDAY... * Sky/Weather............Mostly cloudy with a slight chance of showers in the morning, then partly cloudy with a slight chance of showers and thunderstorms in the afternoon. * Max Temperature........78-83 lower elevations...except 71-77 higher elevations. * Min Humidity...........40-55 percent. * 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. * Mixing Height..........5700 ft AGL. * CWR....................10 percent. * Chance of thunder......16 percent. $$ CAZ215-170000- Northern Sacramento Valley to Southern Tehama County Line Below 1000 Ft- 1230 AM PDT Sat Aug 16 2025 .TODAY... * Sky/Weather............Mostly sunny in the morning, then partly cloudy with a slight chance of showers and thunderstorms in the afternoon. * Max Temperature........89-94. * 24 HR Trend..........9 degrees cooler. * Min Humidity...........36-44 percent. * 24 HR Trend..........19 percent up. * 20-Foot Winds..........South winds 4 to 9 mph. Local gusts up to 20 mph in the afternoon. * CWR....................0 percent. * Mixing Height..........6400 ft AGL. * Chance of thunder......16 percent. .TONIGHT... * Sky/Weather............Mostly cloudy. A slight chance of showers and thunderstorms in the evening, then a slight chance of showers after midnight. * Min Temperature........64-69. * 24 HR Trend..........Little change. * Max Humidity...........79-89 percent. * 24 HR Trend..........14 percent up. * 20-Foot Winds..........Northwest winds 4 to 9 mph shifting to the southeast up to 6 mph after midnight. * CWR....................10 percent. * Mixing Height..........700 ft AGL. * Chance of thunder......16 percent. .SUNDAY... * Sky/Weather............Partly cloudy in the morning then clearing. * Max Temperature........86-91. * Min Humidity...........37-52 percent. * 20-Foot Winds..........South winds 4 to 9 mph. Local gusts up to 20 mph in the afternoon. * Mixing Height..........5100 ft AGL. * CWR....................0 percent. * Chance of thunder......5 percent. $$ CAZ216-170000- Central Sacramento Valley in Glenn, Colusa, Yuba, Northern Sutter, and Butte County Below 1000 Ft- 1230 AM PDT Sat Aug 16 2025 .TODAY... * Sky/Weather............Mostly sunny. * Max Temperature........87-92. * 24 HR Trend..........8 degrees cooler. * Min Humidity...........43-56 percent. * 24 HR Trend..........21 percent up. * 20-Foot Winds..........Southeast winds 4 to 10 mph. Local gusts up to 20 mph in the afternoon. * CWR....................0 percent. * Mixing Height..........4400 ft AGL. * Chance of thunder......7 percent. .TONIGHT... * Sky/Weather............Mostly clear. A slight chance of showers in the evening. * Min Temperature........61-66. * 24 HR Trend..........Little change. * Max Humidity...........85-97 percent. * 24 HR Trend..........7 percent up. * 20-Foot Winds..........Southeast winds 6 to 12 mph with local gusts up to 20 mph. * CWR....................0 percent. * Mixing Height..........500 ft AGL. * Chance of thunder......7 percent. .SUNDAY... * Sky/Weather............Mostly sunny. * Max Temperature........83-88. * Min Humidity...........42-57 percent. * 20-Foot Winds..........Southeast winds 5 to 11 mph with local gusts up to 20 mph. * Mixing Height..........4200 ft AGL. * CWR....................0 percent. * Chance of thunder......1 percent. $$ CAZ217-170000- Southern Sacramento Valley in Yolo- Sacramento Far Western Placer, southern Sutter and Solano County Below 1000 Ft- 1230 AM PDT Sat Aug 16 2025 .TODAY... * Sky/Weather............Mostly sunny. * Max Temperature........86-91. * 24 HR Trend..........8 degrees cooler. * Min Humidity...........43-52 percent. * 24 HR Trend..........17 percent up. * 20-Foot Winds..........South winds 6 to 12 mph. Local gusts up to 25 mph in the afternoon. * CWR....................0 percent. * Mixing Height..........4900 ft AGL. * Chance of thunder......2 percent. .TONIGHT... * Sky/Weather............Mostly clear. * Min Temperature........59-64. * 24 HR Trend..........Little change. * Max Humidity...........83-91 percent. * 24 HR Trend..........Little change. * 20-Foot Winds..........South winds 7 to 13 mph with local gusts up to 25 mph. * CWR....................0 percent. * Mixing Height..........800 ft AGL. * Chance of thunder......2 percent. .SUNDAY... * Sky/Weather............Mostly sunny. * Max Temperature........81-86. * Min Humidity...........36-51 percent. * 20-Foot Winds..........South winds 7 to 13 mph. * Mixing Height..........3900 ft AGL. * CWR....................0 percent. * Chance of thunder......0 percent. $$ CAZ218-170000- Carquinez Strait and Delta- 1230 AM PDT Sat Aug 16 2025 .TODAY... * Sky/Weather............Mostly sunny. * Max Temperature........82-87. * 24 HR Trend..........8 degrees cooler. * Min Humidity...........52-60 percent. * 24 HR Trend..........18 percent up. * 20-Foot Winds..........Southwest winds 11 to 17 mph with local gusts up to 30 mph. * CWR....................0 percent. * Mixing Height..........3400 ft AGL. * Chance of thunder......1 percent. .TONIGHT... * Sky/Weather............Mostly clear. * Min Temperature........59-64. * 24 HR Trend..........Little change. * Max Humidity...........83-90 percent. * 24 HR Trend..........Little change. * 20-Foot Winds..........Southwest winds 11 to 17 mph with local gusts up to 30 mph. * CWR....................0 percent. * Mixing Height..........1000 ft AGL. * Chance of thunder......1 percent. .SUNDAY... * Sky/Weather............Partly cloudy early in the morning then clearing. * Max Temperature........74-80. * Min Humidity...........53-68 percent. * 20-Foot Winds..........Southwest winds 11 to 17 mph with local gusts up to 30 mph. * Mixing Height..........2800 ft AGL. * CWR....................0 percent. * Chance of thunder......0 percent. $$ CAZ219-170000- Northern San Joaquin Valley in San Joaquin and Stanislaus Counties Below 1000 ft- 1230 AM PDT Sat Aug 16 2025 .TODAY... * Sky/Weather............Sunny. * Max Temperature........84-89. * 24 HR Trend..........8 degrees cooler. * Min Humidity...........46-56 percent. * 24 HR Trend..........20 percent up. * 20-Foot Winds..........West winds 12 to 18 mph. * CWR....................0 percent. * Mixing Height..........4300 ft AGL. * Chance of thunder......0 percent. .TONIGHT... * Sky/Weather............Clear. * Min Temperature........59-64. * 24 HR Trend..........Little change. * Max Humidity...........81-91 percent. * 24 HR Trend..........Little change. * 20-Foot Winds..........West winds 12 to 18 mph. * CWR....................0 percent. * Mixing Height..........800 ft AGL. * Chance of thunder......0 percent. .SUNDAY... * Sky/Weather............Sunny. * Max Temperature........81-86. * Min Humidity...........30-45 percent. * 20-Foot Winds..........West winds 8 to 14 mph. * Mixing Height..........4200 ft AGL. * CWR....................0 percent. * Chance of thunder......0 percent. $$ CAZ263-279-170000- Southeast Edge Shasta-Trinity NF and Western Portions of Tehama- Glenn Unit-Eastern Mendocino NF- 1230 AM PDT Sat Aug 16 2025 .TODAY... * Sky/Weather............Mostly sunny in the morning, then partly cloudy with a chance of showers and a slight chance of thunderstorms in the afternoon. * Max Temperature........86-91 lower elevations...except 70-80 higher elevations. * 24 HR Trend..........7 degrees cooler. * Min Humidity...........39-45 percent lower elevations...except 47-58 percent high elevations. * 24 HR Trend..........22 percent up. * 20-Foot Winds.......... * Valleys/Lwr Slopes...North winds 5 to 11 mph shifting to the south 4 to 9 mph in the afternoon. * Ridges/Upr Slopes....North winds 6 to 12 mph shifting to the southwest 5 to 11 mph in the afternoon. * CWR....................10 percent. * Mixing Height..........4900 ft AGL. * Chance of thunder......17 percent. .TONIGHT... * Sky/Weather............Mostly cloudy with a chance of showers and a slight chance of thunderstorms in the evening, then partly cloudy after midnight. * Min Temperature........64-69 lower elevations...except 54-61 higher elevations. * 24 HR Trend..........Little change. * Max Humidity...........76-87 percent. * 24 HR Trend..........16 percent up. * 20-Foot Winds.......... * Valleys/Lwr Slopes...Northwest winds 4 to 9 mph. * Ridges/Upr Slopes....Northwest winds 4 to 9 mph. * CWR....................10 percent. * Mixing Height..........700 ft AGL. * Chance of thunder......17 percent. .SUNDAY... * Sky/Weather............Mostly cloudy in the morning, then partly cloudy with a slight chance of showers in the afternoon. * Max Temperature........82-87 lower elevations...except 65-75 higher elevations. * Min Humidity...........46-61 percent. * 20-Foot Winds.......... * Valleys/Lwr Slopes...Upslope winds up to 5 mph becoming southeast 5 to 10 mph with local gusts up to 20 mph in the afternoon. * Ridges/Upr Slopes....East winds up to 8 mph. * Mixing Height..........4200 ft AGL. * CWR....................10 percent. * Chance of thunder......7 percent. $$ CAZ266-170000- Northern Sierra Foothills from 1000 to 3000 Ft. Includes portions of Shasta-Trinity and Butte Units- 1230 AM PDT Sat Aug 16 2025 .TODAY... * Sky/Weather............Mostly sunny. * Max Temperature........84-89 lower elevations...except 79-86 higher elevations. * 24 HR Trend..........8 degrees cooler. * Min Humidity...........39-48 percent. * 24 HR Trend..........20 percent up. * 20-Foot Winds.......... * Valleys/Lwr Slopes...Southwest winds up to 8 mph. * Ridges/Upr Slopes....Variable winds up to 7 mph becoming southwest 4 to 9 mph with local gusts up to 20 mph in the afternoon. * CWR....................0 percent. * Mixing Height..........5200 ft AGL. * Chance of thunder......12 percent. .TONIGHT... * Sky/Weather............Partly cloudy. A slight chance of showers and thunderstorms in the evening, then a slight chance of showers after midnight. * Min Temperature........60-65. * 24 HR Trend..........Little change. * Max Humidity...........79-94 percent. * 24 HR Trend..........18 percent up. * 20-Foot Winds.......... * Valleys/Lwr Slopes...South winds up to 8 mph. * Ridges/Upr Slopes....South winds up to 8 mph in the evening becoming variable up to 5 mph. * CWR....................10 percent. * Mixing Height..........800 ft AGL. * Chance of thunder......12 percent. .SUNDAY... * Sky/Weather............Partly cloudy early in the morning then clearing. * Max Temperature........80-85 lower elevations...except 75-81 higher elevations. * Min Humidity...........41-56 percent. * 20-Foot Winds.......... * Valleys/Lwr Slopes...Southwest winds 5 to 11 mph. * Ridges/Upr Slopes....Southwest winds 5 to 11 mph. * Mixing Height..........4800 ft AGL. * CWR....................0 percent. * Chance of thunder......4 percent. $$ CAZ220-267-170000- Southern Motherlode From 1000 to 3000 Ft. Includes portions of Toulumne-Calaveras Unit- Northern Motherlode From 1000 to 3000 Ft. Includes portions of Nevada-Yuba-Placer-Amador and Eldorado Units- 1230 AM PDT Sat Aug 16 2025 .TODAY... * Sky/Weather............Sunny. * Max Temperature........81-86. * 24 HR Trend..........7 degrees cooler. * Min Humidity...........41-48 percent. * 24 HR Trend..........17 percent up. * 20-Foot Winds.......... * Valleys/Lwr Slopes...Southwest winds up to 8 mph. * Ridges/Upr Slopes....Southwest winds up to 8 mph. * CWR....................0 percent. * Mixing Height..........4900 ft AGL. * Chance of thunder......1 percent. .TONIGHT... * Sky/Weather............Clear. * Min Temperature........57-62. * 24 HR Trend..........Little change. * Max Humidity...........87-100 percent. * 24 HR Trend..........19 percent up. * 20-Foot Winds.......... * Valleys/Lwr Slopes...South winds up to 8 mph. * Ridges/Upr Slopes....Southwest winds up to 7 mph in the evening becoming variable up to 5 mph. * CWR....................0 percent. * Mixing Height..........700 ft AGL. * Chance of thunder......2 percent. .SUNDAY... * Sky/Weather............Sunny. * Max Temperature........78-83. * Min Humidity...........30-45 percent. * 20-Foot Winds.......... * Valleys/Lwr Slopes...Southwest winds up to 8 mph. * Ridges/Upr Slopes....Variable winds up to 7 mph becoming southwest up to 8 mph in the afternoon. * Mixing Height..........4300 ft AGL. * CWR....................0 percent. * Chance of thunder......1 percent. $$ CAZ268-170000- 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 Sat Aug 16 2025 .TODAY... * Sky/Weather............Mostly sunny. * Max Temperature........74-83 lower elevations...except 69-76 higher elevations. * 24 HR Trend..........6 degrees cooler. * Min Humidity...........33-48 percent. * 24 HR Trend..........15 percent up. * 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..........5600 ft AGL. * Chance of thunder......13 percent. .TONIGHT... * Sky/Weather............Partly cloudy. A slight chance of showers and thunderstorms in the evening, then a slight chance of showers after midnight. * Min Temperature........47-57. * 24 HR Trend..........Little change. * Max Humidity...........81-96 percent...except 95-100 percent in the high mountain valleys. * 24 HR Trend..........21 percent up. * 20-Foot Winds.......... * Valleys/Lwr Slopes...Southwest winds 5 to 11 mph in the evening becoming drainage up to 5 mph. * Ridges/Upr Slopes....South winds 4 to 10 mph. * CWR....................10 percent. * Mixing Height..........1100 ft AGL. * Chance of thunder......13 percent. .SUNDAY... * Sky/Weather............Partly cloudy with a slight chance of showers in the morning, then partly cloudy with a slight chance of showers and thunderstorms in the afternoon. * Max Temperature........70-78 lower elevations...except 64-72 higher elevations. * Min Humidity...........41-56 percent. * 20-Foot Winds.......... * Valleys/Lwr Slopes...South winds 4 to 10 mph. * Ridges/Upr Slopes....South winds 4 to 10 mph. * Mixing Height..........4800 ft AGL. * CWR....................10 percent. * Chance of thunder......12 percent. $$ CAZ221-269-170000- Stanislaus NF West of the Sierra Crest- Northern Sierra Including the Tahoe and Eldorado NF/S West of the Sierra Crest- 1230 AM PDT Sat Aug 16 2025 .TODAY... * Sky/Weather............Mostly sunny. * Max Temperature........77-83 lower elevations...except 66-76 higher elevations. * 24 HR Trend..........5 degrees cooler. * Min Humidity...........33-44 percent. * 24 HR Trend..........14 percent up. * 20-Foot Winds.......... * Valleys/Lwr Slopes...South winds 6 to 12 mph. * Ridges/Upr Slopes....Southwest winds 6 to 12 mph with local gusts up to 25 mph. * CWR....................0 percent. * Mixing Height..........4800 ft AGL. * Chance of thunder......2 percent. .TONIGHT... * Sky/Weather............Mostly clear. * Min Temperature........53-61 lower elevations...except 42-52 higher elevations. * 24 HR Trend..........Little change. * Max Humidity...........82-97 percent. * 24 HR Trend..........22 percent up. * 20-Foot Winds.......... * Valleys/Lwr Slopes...South winds up to 8 mph in the evening becoming drainage up to 5 mph. * Ridges/Upr Slopes....South winds 5 to 11 mph. * CWR....................0 percent. * Mixing Height..........600 ft AGL. * Chance of thunder......2 percent. .SUNDAY... * Sky/Weather............Sunny. * Max Temperature........74-80 lower elevations...except 63-73 higher elevations. * Min Humidity...........36-51 percent lower elevations...except 49-64 percent high elevations. * 20-Foot Winds.......... * Valleys/Lwr Slopes...Upslope winds up to 5 mph becoming southwest 5 to 11 mph in the afternoon. * Ridges/Upr Slopes....South winds 5 to 11 mph. * Mixing Height..........4700 ft AGL. * CWR....................0 percent. * Chance of thunder......4 percent. $$ .Extended... ...Shasta County Mountains and Coastal Range .SUNDAY NIGHT...Mostly clear. Lows 48 to 57. Southwest winds up to 10 mph. .MONDAY...Sunny. Highs 71 to 80. Southeast winds up to 10 mph. .MONDAY NIGHT...Clear. Lows 48 to 58. West winds up to 10 mph. .TUESDAY...Sunny. Highs 75 to 85. Variable less than 5 mph. .TUESDAY NIGHT...Clear. Lows 51 to 61. Variable less than 5 mph. .WEDNESDAY...Warmer, sunny. Highs 82 to 92. Variable less than 5 mph. .WEDNESDAY NIGHT...Clear. Lows 55 to 65. Northwest winds up to 10 mph. ...Northern Sierra and Lassen Park .SUNDAY NIGHT...Clear. Lows 47 to 57. Southeast winds up to 10 mph. .MONDAY...Sunny. Highs 73 to 82. South winds 5 to 15 mph. .MONDAY NIGHT...Clear. Lows 48 to 58. East winds up to 10 mph. .TUESDAY...Sunny. Highs 77 to 85. Southwest winds up to 10 mph. .TUESDAY NIGHT...Clear. Lows 50 to 60. Variable less than 5 mph. .WEDNESDAY...Sunny. Highs 83 to 91. Variable less than 5 mph. .WEDNESDAY NIGHT...Clear. Lows 54 to 64. Variable less than 5 mph. ...Sierra Nevada Foothills .SUNDAY NIGHT...Clear. Lows 54 to 59. Southeast winds up to 10 mph. .MONDAY...Sunny. Highs 79 to 84. Southwest winds up to 10 mph. .MONDAY NIGHT...Clear. Lows 56 to 61. East winds up to 10 mph. .TUESDAY...Sunny. Highs 83 to 88. Variable less than 5 mph. .TUESDAY NIGHT...Clear. Lows 59 to 65. Variable less than 5 mph. .WEDNESDAY...Sunny. Highs 89 to 94. Variable less than 5 mph. .WEDNESDAY NIGHT...Clear. Lows 64 to 69. Variable less than 5 mph. ...Central Valley and Delta .SUNDAY NIGHT...Clear. Lows 53 to 58. South winds 5 to 15 mph. .MONDAY...Sunny. Highs 83 to 88. Southwest winds 5 to 15 mph. .MONDAY NIGHT...Clear. Lows 54 to 59. Southwest winds 5 to 15 mph. .TUESDAY...Sunny. Highs 87 to 92. West winds up to 10 mph. .TUESDAY NIGHT...Clear. Lows 56 to 61. Southwest winds up to 10 mph. .WEDNESDAY...Sunny. Highs 93 to 98. Northwest winds up to 10 mph. .WEDNESDAY NIGHT...Clear. Lows 61 to 66. Southwest winds up to 10 mph. $$