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Alert Archives for All California Counties
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52 total alerts issued on this day

Updates Every 15 Minutes
Spacer GifLast Update:April 22, 2026 - 7:00 am PDT
El Dorado County   3 alerts
WWY.gif   WINTER WEATHER ADVISORY  
  Areas affected: Greater Lake Tahoe Area; Greater Lake Tahoe Area
Effective: Apr 21 1:46 pm Expired: Apr 22 5:00 pm Duration: 1 day   3 hrs   14 mins  
WSW.gif   WINTER STORM WARNING  
  Areas affected: Lassen Volcanic National Park; Sierra Nevada of Tehama-Butte-Plumas Counties Above 3000 ft; Sierra Nevada of Sierra-Nevada-Placer Counties Above 5000 ft Including Interstate 80; Sierra Nevada of El Dorado-Amador-Northern Alpine Counties Above 5000 ft Including Highway 50; Sierra Nevada of Calaveras-Tuolumne-Southern Alpine Counties Above 5000 ft
Effective: Apr 21 11:02 am Expired: Apr 22 5:00 pm Duration: 1 day   5 hrs   58 mins  
SRA.gif   WINTER STORM WATCH  
  Areas affected: Greater Lake Tahoe Area; Greater Lake Tahoe Area
Effective: Apr 20 10:41 am Expired: Apr 20 10:56 am Duration: 0 hrs   15 mins  
Placer County   3 alerts
WWY.gif   WINTER WEATHER ADVISORY  
  Areas affected: Greater Lake Tahoe Area; Greater Lake Tahoe Area
Effective: Apr 21 1:46 pm Expired: Apr 22 5:00 pm Duration: 1 day   3 hrs   14 mins  
WSW.gif   WINTER STORM WARNING  
  Areas affected: Lassen Volcanic National Park; Sierra Nevada of Tehama-Butte-Plumas Counties Above 3000 ft; Sierra Nevada of Sierra-Nevada-Placer Counties Above 5000 ft Including Interstate 80; Sierra Nevada of El Dorado-Amador-Northern Alpine Counties Above 5000 ft Including Highway 50; Sierra Nevada of Calaveras-Tuolumne-Southern Alpine Counties Above 5000 ft
Effective: Apr 21 11:02 am Expired: Apr 22 5:00 pm Duration: 1 day   5 hrs   58 mins  
SRA.gif   WINTER STORM WATCH  
  Areas affected: Greater Lake Tahoe Area; Greater Lake Tahoe Area
Effective: Apr 20 10:41 am Expired: Apr 20 10:56 am Duration: 0 hrs   15 mins  
Nevada County   3 alerts
WWY.gif   WINTER WEATHER ADVISORY  
  Areas affected: Greater Lake Tahoe Area; Greater Lake Tahoe Area
Effective: Apr 21 1:46 pm Expired: Apr 22 5:00 pm Duration: 1 day   3 hrs   14 mins  
WSW.gif   WINTER STORM WARNING  
  Areas affected: Lassen Volcanic National Park; Sierra Nevada of Tehama-Butte-Plumas Counties Above 3000 ft; Sierra Nevada of Sierra-Nevada-Placer Counties Above 5000 ft Including Interstate 80; Sierra Nevada of El Dorado-Amador-Northern Alpine Counties Above 5000 ft Including Highway 50; Sierra Nevada of Calaveras-Tuolumne-Southern Alpine Counties Above 5000 ft
Effective: Apr 21 11:02 am Expired: Apr 22 5:00 pm Duration: 1 day   5 hrs   58 mins  
SRA.gif   WINTER STORM WATCH  
  Areas affected: Greater Lake Tahoe Area; Greater Lake Tahoe Area
Effective: Apr 20 10:41 am Expired: Apr 20 10:56 am Duration: 0 hrs   15 mins  
Alpine County   3 alerts
WWY.gif   WINTER WEATHER ADVISORY  
  Areas affected: Greater Lake Tahoe Area; Greater Lake Tahoe Area
Effective: Apr 21 1:46 pm Expired: Apr 22 5:00 pm Duration: 1 day   3 hrs   14 mins  
WSW.gif   WINTER STORM WARNING  
  Areas affected: Lassen Volcanic National Park; Sierra Nevada of Tehama-Butte-Plumas Counties Above 3000 ft; Sierra Nevada of Sierra-Nevada-Placer Counties Above 5000 ft Including Interstate 80; Sierra Nevada of El Dorado-Amador-Northern Alpine Counties Above 5000 ft Including Highway 50; Sierra Nevada of Calaveras-Tuolumne-Southern Alpine Counties Above 5000 ft
Effective: Apr 21 11:02 am Expired: Apr 22 5:00 pm Duration: 1 day   5 hrs   58 mins  
SRA.gif   WINTER STORM WATCH  
  Areas affected: Greater Lake Tahoe Area; Greater Lake Tahoe Area
Effective: Apr 20 10:41 am Expired: Apr 20 10:56 am Duration: 0 hrs   15 mins  
Plumas County
WSW.gif   WINTER STORM WARNING  
  Areas affected: Lassen Volcanic National Park; Sierra Nevada of Tehama-Butte-Plumas Counties Above 3000 ft; Sierra Nevada of Sierra-Nevada-Placer Counties Above 5000 ft Including Interstate 80; Sierra Nevada of El Dorado-Amador-Northern Alpine Counties Above 5000 ft Including Highway 50; Sierra Nevada of Calaveras-Tuolumne-Southern Alpine Counties Above 5000 ft
Effective: Apr 21 11:02 am Expired: Apr 22 5:00 pm Duration: 1 day   5 hrs   58 mins  
Amador County
WSW.gif   WINTER STORM WARNING  
  Areas affected: Lassen Volcanic National Park; Sierra Nevada of Tehama-Butte-Plumas Counties Above 3000 ft; Sierra Nevada of Sierra-Nevada-Placer Counties Above 5000 ft Including Interstate 80; Sierra Nevada of El Dorado-Amador-Northern Alpine Counties Above 5000 ft Including Highway 50; Sierra Nevada of Calaveras-Tuolumne-Southern Alpine Counties Above 5000 ft
Effective: Apr 21 11:02 am Expired: Apr 22 5:00 pm Duration: 1 day   5 hrs   58 mins  
Butte County
WSW.gif   WINTER STORM WARNING  
  Areas affected: Lassen Volcanic National Park; Sierra Nevada of Tehama-Butte-Plumas Counties Above 3000 ft; Sierra Nevada of Sierra-Nevada-Placer Counties Above 5000 ft Including Interstate 80; Sierra Nevada of El Dorado-Amador-Northern Alpine Counties Above 5000 ft Including Highway 50; Sierra Nevada of Calaveras-Tuolumne-Southern Alpine Counties Above 5000 ft
Effective: Apr 21 11:02 am Expired: Apr 22 5:00 pm Duration: 1 day   5 hrs   58 mins  
Calaveras County
WSW.gif   WINTER STORM WARNING  
  Areas affected: Lassen Volcanic National Park; Sierra Nevada of Tehama-Butte-Plumas Counties Above 3000 ft; Sierra Nevada of Sierra-Nevada-Placer Counties Above 5000 ft Including Interstate 80; Sierra Nevada of El Dorado-Amador-Northern Alpine Counties Above 5000 ft Including Highway 50; Sierra Nevada of Calaveras-Tuolumne-Southern Alpine Counties Above 5000 ft
Effective: Apr 21 11:02 am Expired: Apr 22 5:00 pm Duration: 1 day   5 hrs   58 mins  
Lassen County
WSW.gif   WINTER STORM WARNING  
  Areas affected: Lassen Volcanic National Park; Sierra Nevada of Tehama-Butte-Plumas Counties Above 3000 ft; Sierra Nevada of Sierra-Nevada-Placer Counties Above 5000 ft Including Interstate 80; Sierra Nevada of El Dorado-Amador-Northern Alpine Counties Above 5000 ft Including Highway 50; Sierra Nevada of Calaveras-Tuolumne-Southern Alpine Counties Above 5000 ft
Effective: Apr 21 11:02 am Expired: Apr 22 5:00 pm Duration: 1 day   5 hrs   58 mins  
Shasta County
WSW.gif   WINTER STORM WARNING  
  Areas affected: Lassen Volcanic National Park; Sierra Nevada of Tehama-Butte-Plumas Counties Above 3000 ft; Sierra Nevada of Sierra-Nevada-Placer Counties Above 5000 ft Including Interstate 80; Sierra Nevada of El Dorado-Amador-Northern Alpine Counties Above 5000 ft Including Highway 50; Sierra Nevada of Calaveras-Tuolumne-Southern Alpine Counties Above 5000 ft
Effective: Apr 21 11:02 am Expired: Apr 22 5:00 pm Duration: 1 day   5 hrs   58 mins  
Sierra County
WSW.gif   WINTER STORM WARNING  
  Areas affected: Lassen Volcanic National Park; Sierra Nevada of Tehama-Butte-Plumas Counties Above 3000 ft; Sierra Nevada of Sierra-Nevada-Placer Counties Above 5000 ft Including Interstate 80; Sierra Nevada of El Dorado-Amador-Northern Alpine Counties Above 5000 ft Including Highway 50; Sierra Nevada of Calaveras-Tuolumne-Southern Alpine Counties Above 5000 ft
Effective: Apr 21 11:02 am Expired: Apr 22 5:00 pm Duration: 1 day   5 hrs   58 mins  
Tehama County
WSW.gif   WINTER STORM WARNING  
  Areas affected: Lassen Volcanic National Park; Sierra Nevada of Tehama-Butte-Plumas Counties Above 3000 ft; Sierra Nevada of Sierra-Nevada-Placer Counties Above 5000 ft Including Interstate 80; Sierra Nevada of El Dorado-Amador-Northern Alpine Counties Above 5000 ft Including Highway 50; Sierra Nevada of Calaveras-Tuolumne-Southern Alpine Counties Above 5000 ft
Effective: Apr 21 11:02 am Expired: Apr 22 5:00 pm Duration: 1 day   5 hrs   58 mins  
Tuolumne County
WSW.gif   WINTER STORM WARNING   (3 updates)
  Areas affected: Lassen Volcanic National Park; Sierra Nevada of Tehama-Butte-Plumas Counties Above 3000 ft; Sierra Nevada of Sierra-Nevada-Placer Counties Above 5000 ft Including Interstate 80; Sierra Nevada of El Dorado-Amador-Northern Alpine Counties Above 5000 ft Including Highway 50; Sierra Nevada of Calaveras-Tuolumne-Southern Alpine Counties Above 5000 ft
Effective: Apr 21 11:02 am Expired: Apr 22 5:00 pm Duration: 1 day   5 hrs   58 mins  
  Areas affected: Yosemite NP outside of the valley; Upper San Joaquin River; Kaiser to Rodgers Ridge; Kings Canyon NP; Sequoia NP
Effective: Apr 21 6:47 pm Expired: Apr 22 3:00 am Duration: 8 hrs   13 mins  
  Areas affected: Yosemite NP outside of the valley; Upper San Joaquin River; Kaiser to Rodgers Ridge; Kings Canyon NP; Sequoia NP
Effective: Apr 22 2:41 am Expired: Apr 22 10:00 am Duration: 7 hrs   19 mins  
Fresno County
WSW.gif   WINTER STORM WARNING   (2 updates)
  Areas affected: Yosemite NP outside of the valley; Upper San Joaquin River; Kaiser to Rodgers Ridge; Kings Canyon NP; Sequoia NP
Effective: Apr 21 6:47 pm Expired: Apr 22 3:00 am Duration: 8 hrs   13 mins  
  Areas affected: Yosemite NP outside of the valley; Upper San Joaquin River; Kaiser to Rodgers Ridge; Kings Canyon NP; Sequoia NP
Effective: Apr 22 2:41 am Expired: Apr 22 10:00 am Duration: 7 hrs   19 mins  
Madera County
WSW.gif   WINTER STORM WARNING   (2 updates)
  Areas affected: Yosemite NP outside of the valley; Upper San Joaquin River; Kaiser to Rodgers Ridge; Kings Canyon NP; Sequoia NP
Effective: Apr 21 6:47 pm Expired: Apr 22 3:00 am Duration: 8 hrs   13 mins  
  Areas affected: Yosemite NP outside of the valley; Upper San Joaquin River; Kaiser to Rodgers Ridge; Kings Canyon NP; Sequoia NP
Effective: Apr 22 2:41 am Expired: Apr 22 10:00 am Duration: 7 hrs   19 mins  
Tulare County
WSW.gif   WINTER STORM WARNING   (2 updates)
  Areas affected: Yosemite NP outside of the valley; Upper San Joaquin River; Kaiser to Rodgers Ridge; Kings Canyon NP; Sequoia NP
Effective: Apr 21 6:47 pm Expired: Apr 22 3:00 am Duration: 8 hrs   13 mins  
  Areas affected: Yosemite NP outside of the valley; Upper San Joaquin River; Kaiser to Rodgers Ridge; Kings Canyon NP; Sequoia NP
Effective: Apr 22 2:41 am Expired: Apr 22 10:00 am Duration: 7 hrs   19 mins  
Imperial County
WIY.gif   WIND ADVISORY   (2 updates)
  Areas affected: Imperial County Southwest
Effective: Apr 21 5:17 pm Expired: Apr 22 5:30 am Duration: 12 hrs   13 mins  
  Areas affected: Imperial County Southwest
Effective: Apr 22 12:22 am Expired: Apr 22 8:00 am Duration: 7 hrs   38 mins  
Kern County
WIY.gif   WIND ADVISORY   (2 updates)
  Areas affected: Mojave Desert Slopes
Effective: Apr 21 9:39 pm Expired: Apr 22 6:00 am Duration: 8 hrs   21 mins  
  Areas affected: Indian Wells Valley; Mojave Desert
Effective: Apr 21 9:39 pm Expired: Apr 22 6:00 am Duration: 8 hrs   21 mins  
Mono County   2 alerts
WWY.gif   WINTER WEATHER ADVISORY  
  Areas affected: Mono
Effective: Apr 21 1:46 pm Expired: Apr 22 5:00 pm Duration: 1 day   3 hrs   14 mins  
SRA.gif   WINTER STORM WATCH  
  Areas affected: Mono
Effective: Apr 20 10:41 am Expired: Apr 20 10:56 am Duration: 0 hrs   15 mins  
Riverside County   2 alerts
WIY.gif   WIND ADVISORY   (4 updates)
  Areas affected: San Gorgonio Pass Near Banning
Effective: Apr 21 9:52 pm Expired: Apr 22 6:15 am Duration: 8 hrs   23 mins  
  Areas affected: Riverside County Mountains; San Diego County Mountains
Effective: Apr 21 9:52 pm Expired: Apr 22 6:15 am Duration: 8 hrs   23 mins  
  Areas affected: Riverside County Mountains; San Diego County Mountains
Effective: Apr 22 3:59 am Expired: Apr 22 7:00 am Duration: 3 hrs   01 min  
  Areas affected: San Gorgonio Pass Near Banning
Effective: Apr 22 3:59 am Expired: Apr 22 7:00 am Duration: 3 hrs   01 min  
SPS.gif   AIR QUALITY ALERT  
  Areas affected: Coachella Valley; San Gorgonio Pass Near Banning
Effective: Apr 21 12:26 pm Expired: Apr 23 12:15 am Duration: 1 day   11 hrs   49 mins  
San Diego County
WIY.gif   WIND ADVISORY   (4 updates)
  Areas affected: Riverside County Mountains; San Diego County Mountains
Effective: Apr 21 9:52 pm Expired: Apr 22 6:15 am Duration: 8 hrs   23 mins  
  Areas affected: Apple and Lucerne Valleys; San Diego County Deserts
Effective: Apr 21 9:52 pm Expired: Apr 22 6:15 am Duration: 8 hrs   23 mins  
  Areas affected: Riverside County Mountains; San Diego County Mountains
Effective: Apr 22 3:59 am Expired: Apr 22 7:00 am Duration: 3 hrs   01 min  
  Areas affected: Apple and Lucerne Valleys; San Diego County Deserts
Effective: Apr 22 3:59 am Expired: Apr 22 7:00 am Duration: 3 hrs   01 min  
San Bernardino County
WIY.gif   WIND ADVISORY   (4 updates)
  Areas affected: San Bernardino County Mountains
Effective: Apr 21 9:52 pm Expired: Apr 22 6:15 am Duration: 8 hrs   23 mins  
  Areas affected: Apple and Lucerne Valleys; San Diego County Deserts
Effective: Apr 21 9:52 pm Expired: Apr 22 6:15 am Duration: 8 hrs   23 mins  
  Areas affected: San Bernardino County Mountains
Effective: Apr 22 3:59 am Expired: Apr 22 7:00 am Duration: 3 hrs   01 min  
  Areas affected: Apple and Lucerne Valleys; San Diego County Deserts
Effective: Apr 22 3:59 am Expired: Apr 22 7:00 am Duration: 3 hrs   01 min  
Mariposa County
WSW.gif   WINTER STORM WARNING   (2 updates)
  Areas affected: Yosemite NP outside of the valley; Upper San Joaquin River; Kaiser to Rodgers Ridge; Kings Canyon NP; Sequoia NP
Effective: Apr 21 6:47 pm Expired: Apr 22 3:00 am Duration: 8 hrs   13 mins  
  Areas affected: Yosemite NP outside of the valley; Upper San Joaquin River; Kaiser to Rodgers Ridge; Kings Canyon NP; Sequoia NP
Effective: Apr 22 2:41 am Expired: Apr 22 10:00 am Duration: 7 hrs   19 mins  


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