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

Updates Every 15 Minutes
Spacer GifLast Update:April 21, 2026 - 7:00 am PDT
El Dorado County   3 alerts
WSW.gif   WINTER STORM WARNING   (2 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 20 2:11 pm Expired: Apr 21 5:15 pm Duration: 1 day   3 hrs   04 mins  
  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  
WWY.gif   WINTER WEATHER ADVISORY   (2 updates)
  Areas affected: Greater Lake Tahoe Area; Greater Lake Tahoe Area
Effective: Apr 20 10:41 am Expired: Apr 21 5:00 pm Duration: 1 day   6 hrs   19 mins  
  Areas affected: Greater Lake Tahoe Area; Greater Lake Tahoe Area
Effective: Apr 21 12:11 am Expired: Apr 22 5:00 pm Duration: 1 day   16 hrs   49 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
WSW.gif   WINTER STORM WARNING   (2 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 20 2:11 pm Expired: Apr 21 5:15 pm Duration: 1 day   3 hrs   04 mins  
  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  
WWY.gif   WINTER WEATHER ADVISORY   (2 updates)
  Areas affected: Greater Lake Tahoe Area; Greater Lake Tahoe Area
Effective: Apr 20 10:41 am Expired: Apr 21 5:00 pm Duration: 1 day   6 hrs   19 mins  
  Areas affected: Greater Lake Tahoe Area; Greater Lake Tahoe Area
Effective: Apr 21 12:11 am Expired: Apr 22 5:00 pm Duration: 1 day   16 hrs   49 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
WSW.gif   WINTER STORM WARNING   (2 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 20 2:11 pm Expired: Apr 21 5:15 pm Duration: 1 day   3 hrs   04 mins  
  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  
WWY.gif   WINTER WEATHER ADVISORY   (2 updates)
  Areas affected: Greater Lake Tahoe Area; Greater Lake Tahoe Area
Effective: Apr 20 10:41 am Expired: Apr 21 5:00 pm Duration: 1 day   6 hrs   19 mins  
  Areas affected: Greater Lake Tahoe Area; Greater Lake Tahoe Area
Effective: Apr 21 12:11 am Expired: Apr 22 5:00 pm Duration: 1 day   16 hrs   49 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  
Amador County
WSW.gif   WINTER STORM WARNING   (2 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 20 2:11 pm Expired: Apr 21 5:15 pm Duration: 1 day   3 hrs   04 mins  
  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  
Alpine County   3 alerts
WSW.gif   WINTER STORM WARNING   (2 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 20 2:11 pm Expired: Apr 21 5:15 pm Duration: 1 day   3 hrs   04 mins  
  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  
WWY.gif   WINTER WEATHER ADVISORY   (2 updates)
  Areas affected: Greater Lake Tahoe Area; Greater Lake Tahoe Area
Effective: Apr 20 10:41 am Expired: Apr 21 5:00 pm Duration: 1 day   6 hrs   19 mins  
  Areas affected: Greater Lake Tahoe Area; Greater Lake Tahoe Area
Effective: Apr 21 12:11 am Expired: Apr 22 5:00 pm Duration: 1 day   16 hrs   49 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  
Butte County
WSW.gif   WINTER STORM WARNING   (2 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 20 2:11 pm Expired: Apr 21 5:15 pm Duration: 1 day   3 hrs   04 mins  
  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   (2 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 20 2:11 pm Expired: Apr 21 5:15 pm Duration: 1 day   3 hrs   04 mins  
  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   (2 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 20 2:11 pm Expired: Apr 21 5:15 pm Duration: 1 day   3 hrs   04 mins  
  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   (2 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 20 2:11 pm Expired: Apr 21 5:15 pm Duration: 1 day   3 hrs   04 mins  
  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   (2 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 20 2:11 pm Expired: Apr 21 5:15 pm Duration: 1 day   3 hrs   04 mins  
  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   (5 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 20 2:11 pm Expired: Apr 21 5:15 pm Duration: 1 day   3 hrs   04 mins  
  Areas affected: Yosemite NP outside of the valley; Upper San Joaquin River; Kaiser to Rodgers Ridge; Kings Canyon NP; Sequoia NP
Effective: Apr 20 5:33 pm Expired: Apr 21 2:00 am Duration: 8 hrs   27 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 12:38 am Expired: Apr 21 11:00 am Duration: 10 hrs   22 mins  
  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 10:45 am Expired: Apr 21 7:00 pm Duration: 8 hrs   15 mins  
Fresno County
WSW.gif   WINTER STORM WARNING   (3 updates)
  Areas affected: Yosemite NP outside of the valley; Upper San Joaquin River; Kaiser to Rodgers Ridge; Kings Canyon NP; Sequoia NP
Effective: Apr 20 5:33 pm Expired: Apr 21 2:00 am Duration: 8 hrs   27 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 12:38 am Expired: Apr 21 11:00 am Duration: 10 hrs   22 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 10:45 am Expired: Apr 21 7:00 pm Duration: 8 hrs   15 mins  
Madera County
WSW.gif   WINTER STORM WARNING   (3 updates)
  Areas affected: Yosemite NP outside of the valley; Upper San Joaquin River; Kaiser to Rodgers Ridge; Kings Canyon NP; Sequoia NP
Effective: Apr 20 5:33 pm Expired: Apr 21 2:00 am Duration: 8 hrs   27 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 12:38 am Expired: Apr 21 11:00 am Duration: 10 hrs   22 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 10:45 am Expired: Apr 21 7:00 pm Duration: 8 hrs   15 mins  
Mariposa County
WSW.gif   WINTER STORM WARNING   (3 updates)
  Areas affected: Yosemite NP outside of the valley; Upper San Joaquin River; Kaiser to Rodgers Ridge; Kings Canyon NP; Sequoia NP
Effective: Apr 20 5:33 pm Expired: Apr 21 2:00 am Duration: 8 hrs   27 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 12:38 am Expired: Apr 21 11:00 am Duration: 10 hrs   22 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 10:45 am Expired: Apr 21 7:00 pm Duration: 8 hrs   15 mins  
Tulare County
WSW.gif   WINTER STORM WARNING   (3 updates)
  Areas affected: Yosemite NP outside of the valley; Upper San Joaquin River; Kaiser to Rodgers Ridge; Kings Canyon NP; Sequoia NP
Effective: Apr 20 5:33 pm Expired: Apr 21 2:00 am Duration: 8 hrs   27 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 12:38 am Expired: Apr 21 11:00 am Duration: 10 hrs   22 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 10:45 am Expired: Apr 21 7:00 pm Duration: 8 hrs   15 mins  
Imperial County   2 alerts
WIY.gif   WIND ADVISORY   (2 updates)
  Areas affected: Imperial County Southwest
Effective: Apr 20 9:53 pm Expired: Apr 21 4:00 pm Duration: 18 hrs   07 mins  
  Areas affected: Imperial County Southwest
Effective: Apr 21 12:18 am Expired: Apr 21 2:00 pm Duration: 13 hrs   42 mins  
SPS.gif   AIR QUALITY ALERT  
  Areas affected: Imperial County Southwest; Imperial County West; Imperial Valley
Effective: Apr 20 9:40 am Expired: Apr 22 12:00 am Duration: 1 day   14 hrs   20 mins  
Kern County
WIY.gif   WIND ADVISORY   (6 updates)
  Areas affected: Mojave Desert Slopes
Effective: Apr 20 8:32 pm Expired: Apr 21 5:00 am Duration: 8 hrs   28 mins  
  Areas affected: Indian Wells Valley; Mojave Desert
Effective: Apr 20 8:32 pm Expired: Apr 21 5:00 am Duration: 8 hrs   28 mins  
  Areas affected: Mojave Desert Slopes
Effective: Apr 21 4:39 am Expired: Apr 21 2:00 pm Duration: 9 hrs   21 mins  
  Areas affected: Indian Wells Valley; Mojave Desert
Effective: Apr 21 4:39 am Expired: Apr 21 2:00 pm Duration: 9 hrs   21 mins  
  Areas affected: Mojave Desert Slopes
Effective: Apr 21 11:14 am Expired: Apr 21 10:00 pm Duration: 10 hrs   46 mins  
  Areas affected: Indian Wells Valley; Mojave Desert
Effective: Apr 21 11:14 am Expired: Apr 21 10:00 pm Duration: 10 hrs   46 mins  
Mono County   2 alerts
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  
WWY.gif   WINTER WEATHER ADVISORY   (2 updates)
  Areas affected: Mono
Effective: Apr 20 10:41 am Expired: Apr 21 5:00 pm Duration: 1 day   6 hrs   19 mins  
  Areas affected: Mono
Effective: Apr 21 12:11 am Expired: Apr 22 5:00 pm Duration: 1 day   16 hrs   49 mins  
Riverside County
WIY.gif   WIND ADVISORY   (6 updates)
  Areas affected: Riverside County Mountains; San Diego County Mountains
Effective: Apr 20 9:39 pm Expired: Apr 21 6:15 am Duration: 8 hrs   36 mins  
  Areas affected: San Gorgonio Pass Near Banning
Effective: Apr 20 9:39 pm Expired: Apr 21 6:15 am Duration: 8 hrs   36 mins  
  Areas affected: San Gorgonio Pass Near Banning
Effective: Apr 21 3:55 am Expired: Apr 21 3:30 pm Duration: 11 hrs   35 mins  
  Areas affected: Riverside County Mountains; San Diego County Mountains
Effective: Apr 21 3:55 am Expired: Apr 21 3:30 pm Duration: 11 hrs   35 mins  
  Areas affected: San Gorgonio Pass Near Banning
Effective: Apr 21 10:30 am Expired: Apr 21 10:15 pm Duration: 11 hrs   45 mins  
  Areas affected: Riverside County Mountains; San Diego County Mountains
Effective: Apr 21 10:30 am Expired: Apr 21 10:15 pm Duration: 11 hrs   45 mins  
San Diego County
WIY.gif   WIND ADVISORY   (6 updates)
  Areas affected: Riverside County Mountains; San Diego County Mountains
Effective: Apr 20 9:39 pm Expired: Apr 21 6:15 am Duration: 8 hrs   36 mins  
  Areas affected: Apple and Lucerne Valleys; San Diego County Deserts
Effective: Apr 20 9:39 pm Expired: Apr 21 6:15 am Duration: 8 hrs   36 mins  
  Areas affected: Riverside County Mountains; San Diego County Mountains
Effective: Apr 21 3:55 am Expired: Apr 21 3:30 pm Duration: 11 hrs   35 mins  
  Areas affected: Apple and Lucerne Valleys; San Diego County Deserts
Effective: Apr 21 3:55 am Expired: Apr 21 3:30 pm Duration: 11 hrs   35 mins  
  Areas affected: Apple and Lucerne Valleys; San Diego County Deserts
Effective: Apr 21 10:30 am Expired: Apr 21 10:15 pm Duration: 11 hrs   45 mins  
  Areas affected: Riverside County Mountains; San Diego County Mountains
Effective: Apr 21 10:30 am Expired: Apr 21 10:15 pm Duration: 11 hrs   45 mins  
San Bernardino County
WIY.gif   WIND ADVISORY   (11 updates)
  Areas affected: Apple and Lucerne Valleys; San Diego County Deserts
Effective: Apr 20 9:39 pm Expired: Apr 21 6:15 am Duration: 8 hrs   36 mins  
  Areas affected: San Bernardino County Mountains
Effective: Apr 20 9:39 pm Expired: Apr 21 6:15 am Duration: 8 hrs   36 mins  
  Areas affected: Northwest Plateau; Lake Mead - AZ side; Lake Mohave - AZ side; Hualapai Mountains; Northwest Deserts; Western Mojave Desert; Morongo Basin; Northeast Clark County; Western Clark and Southern Nye County; Sheep Range; Spring Mountains-Red Rock Canyon; Las Vegas Valley; Southern Clark County; Lake Mead - NV side; Lake Mohave - NV side
Effective: Apr 20 10:32 am Expired: Apr 21 5:15 am Duration: 18 hrs   43 mins  
  Areas affected: Joshua Tree NP West
Effective: Apr 21 12:18 am Expired: Apr 21 2:00 pm Duration: 13 hrs   42 mins  
  Areas affected: Northwest Plateau; Lake Mead - AZ side; Lake Mohave - AZ side; Hualapai Mountains; Northwest Deserts; Western Mojave Desert; Morongo Basin; Northeast Clark County; Western Clark and Southern Nye County; Sheep Range; Spring Mountains-Red Rock Canyon; Las Vegas Valley; Southern Clark County; Lake Mead - NV side; Lake Mohave - NV side
Effective: Apr 21 12:34 am Expired: Apr 21 9:45 am Duration: 9 hrs   11 mins  
  Areas affected: San Bernardino County Mountains
Effective: Apr 21 3:55 am Expired: Apr 21 3:30 pm Duration: 11 hrs   35 mins  
  Areas affected: Apple and Lucerne Valleys; San Diego County Deserts
Effective: Apr 21 3:55 am Expired: Apr 21 3:30 pm Duration: 11 hrs   35 mins  
  Areas affected: Northwest Plateau; Lake Mead - AZ side; Lake Mohave - AZ side; Hualapai Mountains; Northwest Deserts; Western Mojave Desert; Morongo Basin; Northeast Clark County; Western Clark and Southern Nye County; Sheep Range; Spring Mountains-Red Rock Canyon; Las Vegas Valley; Southern Clark County; Lake Mead - NV side; Lake Mohave - NV side
Effective: Apr 21 9:23 am Expired: Apr 21 11:00 pm Duration: 13 hrs   37 mins  
  Areas affected: Apple and Lucerne Valleys; San Diego County Deserts
Effective: Apr 21 10:30 am Expired: Apr 21 10:15 pm Duration: 11 hrs   45 mins  
  Areas affected: San Bernardino County Mountains
Effective: Apr 21 10:30 am Expired: Apr 21 10:15 pm Duration: 11 hrs   45 mins  
  Areas affected: Northwest Plateau; Lake Mead - AZ side; Lake Mohave - AZ side; Hualapai Mountains; Northwest Deserts; Western Mojave Desert; Morongo Basin; Northeast Clark County; Western Clark and Southern Nye County; Sheep Range; Southern Clark County; Lake Mead - NV side; Lake Mohave - NV side
Effective: Apr 21 10:28 am Expired: Apr 21 11:00 pm Duration: 12 hrs   32 mins  
Siskiyou County
WWY.gif   WINTER WEATHER ADVISORY   (2 updates)
  Areas affected: Western Siskiyou County; Central Siskiyou County; South Central Siskiyou County
Effective: Apr 20 12:59 pm Expired: Apr 21 6:00 am Duration: 17 hrs   01 min  
  Areas affected: Western Siskiyou County; Central Siskiyou County; South Central Siskiyou County
Effective: Apr 21 3:06 am Expired: Apr 21 11:00 am Duration: 7 hrs   54 mins  
Trinity County
WWY.gif   WINTER WEATHER ADVISORY   (2 updates)
  Areas affected: Northeastern Trinity
Effective: Apr 20 8:51 pm Expired: Apr 21 5:00 am Duration: 8 hrs   09 mins  
  Areas affected: Northeastern Trinity
Effective: Apr 21 5:49 am Expired: Apr 21 11:00 am Duration: 5 hrs   11 mins  
Plumas County
WSW.gif   WINTER STORM WARNING   (2 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 20 2:11 pm Expired: Apr 21 5:15 pm Duration: 1 day   3 hrs   04 mins  
  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   (2 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 20 2:11 pm Expired: Apr 21 5:15 pm Duration: 1 day   3 hrs   04 mins  
  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  
Inyo County   2 alerts
WIY.gif   WIND ADVISORY   (4 updates)
  Areas affected: Eastern Sierra Slopes of Inyo County; White Mountains of Inyo County; Owens Valley South; Owens Valley North; Lincoln County
Effective: Apr 20 10:32 am Expired: Apr 21 5:15 am Duration: 18 hrs   43 mins  
  Areas affected: Eastern Sierra Slopes of Inyo County; White Mountains of Inyo County; Owens Valley South; Owens Valley North; Lincoln County
Effective: Apr 21 12:34 am Expired: Apr 21 9:45 am Duration: 9 hrs   11 mins  
  Areas affected: Eastern Sierra Slopes of Inyo County; White Mountains of Inyo County; Owens Valley South; Owens Valley North; Lincoln County
Effective: Apr 21 9:23 am Expired: Apr 21 11:00 pm Duration: 13 hrs   37 mins  
  Areas affected: Eastern Sierra Slopes of Inyo County; White Mountains of Inyo County; Owens Valley South; Owens Valley North; Lincoln County
Effective: Apr 21 10:28 am Expired: Apr 21 11:00 pm Duration: 12 hrs   32 mins  
HWW.gif   HIGH WIND WARNING   (4 updates)
  Areas affected: Death Valley National Park
Effective: Apr 20 10:32 am Expired: Apr 21 5:15 am Duration: 18 hrs   43 mins  
  Areas affected: Death Valley National Park; Esmeralda and Central Nye County
Effective: Apr 21 12:34 am Expired: Apr 21 9:45 am Duration: 9 hrs   11 mins  
  Areas affected: Death Valley National Park; Esmeralda and Central Nye County
Effective: Apr 21 9:23 am Expired: Apr 21 11:00 pm Duration: 13 hrs   37 mins  
  Areas affected: Death Valley National Park; Esmeralda and Central Nye County
Effective: Apr 21 10:28 am Expired: Apr 21 11:00 pm Duration: 12 hrs   32 mins  
Ventura County
WIY.gif   WIND ADVISORY  
  Areas affected: Southern Ventura County Mountains; Northern Ventura County Mountains
Effective: Apr 21 10:00 am Expired: Apr 21 5:00 pm Duration: 7 hrs   00 mins  


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