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

Updates Every 15 Minutes
Spacer GifLast Update:September 21, 2026 - 7:00 am PDT
Fresno County   2 alerts
LWY.gif   LAKE WIND ADVISORY   (4 updates)
  Areas affected: West Side Mountains north of 198
Effective: Sep 21 3:46 am Expired: Sep 21 12:15 pm Duration: 8 hrs   29 mins  
  Areas affected: West Side Mountains north of 198
Effective: Sep 21 6:28 am Expired: Sep 21 3:00 pm Duration: 8 hrs   32 mins  
  Areas affected: West Side Mountains north of 198
Effective: Sep 21 2:33 pm Expired: Sep 21 11:00 pm Duration: 8 hrs   27 mins  
  Areas affected: West Side Mountains north of 198
Effective: Sep 21 10:31 pm Expired: Sep 22 5:00 am Duration: 6 hrs   29 mins  
SPS.gif   SPECIAL WEATHER STATEMENT  
At 329 PM PDT, Doppler radar was tracking a strong thunderstorm near
  Areas affected: Mariposa-Madera Lower Sierra; Yosemite NP outside of the valley; Upper San Joaquin River
Effective: Sep 21 3:30 pm Expired: Sep 21 4:00 pm Duration: 0 hrs   30 mins  
Merced County
LWY.gif   LAKE WIND ADVISORY   (4 updates)
  Areas affected: West Side Mountains north of 198
Effective: Sep 21 3:46 am Expired: Sep 21 12:15 pm Duration: 8 hrs   29 mins  
  Areas affected: West Side Mountains north of 198
Effective: Sep 21 6:28 am Expired: Sep 21 3:00 pm Duration: 8 hrs   32 mins  
  Areas affected: West Side Mountains north of 198
Effective: Sep 21 2:33 pm Expired: Sep 21 11:00 pm Duration: 8 hrs   27 mins  
  Areas affected: West Side Mountains north of 198
Effective: Sep 21 10:31 pm Expired: Sep 22 5:00 am Duration: 6 hrs   29 mins  
Plumas County
SVR.gif   SEVERE THUNDERSTORM WARNING   (3 updates)
SVRSTO
  Areas affected: Plumas, CA; Sierra, CA
Effective: Sep 21 3:29 pm Expired: Sep 21 4:15 pm Duration: 0 hrs   46 mins  
SVRSTO
  Areas affected: Plumas, CA
Effective: Sep 21 4:32 pm Expired: Sep 21 5:00 pm Duration: 0 hrs   28 mins  
SVRSTO
  Areas affected: Plumas, CA
Effective: Sep 21 4:52 pm Expired: Sep 21 5:15 pm Duration: 0 hrs   23 mins  
Sierra County
SVR.gif   SEVERE THUNDERSTORM WARNING  
SVRSTO
  Areas affected: Plumas, CA; Sierra, CA
Effective: Sep 21 3:29 pm Expired: Sep 21 4:15 pm Duration: 0 hrs   46 mins  
Tuolumne County
SPS.gif   SPECIAL WEATHER STATEMENT  
At 329 PM PDT, Doppler radar was tracking a strong thunderstorm near
  Areas affected: Mariposa-Madera Lower Sierra; Yosemite NP outside of the valley; Upper San Joaquin River
Effective: Sep 21 3:30 pm Expired: Sep 21 4:00 pm Duration: 0 hrs   30 mins  
Madera County
SPS.gif   SPECIAL WEATHER STATEMENT  
At 329 PM PDT, Doppler radar was tracking a strong thunderstorm near
  Areas affected: Mariposa-Madera Lower Sierra; Yosemite NP outside of the valley; Upper San Joaquin River
Effective: Sep 21 3:30 pm Expired: Sep 21 4:00 pm Duration: 0 hrs   30 mins  
Mariposa County
SPS.gif   SPECIAL WEATHER STATEMENT  
At 329 PM PDT, Doppler radar was tracking a strong thunderstorm near
  Areas affected: Mariposa-Madera Lower Sierra; Yosemite NP outside of the valley; Upper San Joaquin River
Effective: Sep 21 3:30 pm Expired: Sep 21 4:00 pm Duration: 0 hrs   30 mins  
Inyo County
FLS.gif   FLOOD ADVISORY   (2 updates)
  Areas affected: Inyo, CA
Effective: Sep 21 3:35 pm Expired: Sep 21 7:30 pm Duration: 3 hrs   55 mins  
  Areas affected: Inyo, CA
Effective: Sep 21 5:35 pm Expired: Sep 21 7:30 pm Duration: 1 hr   55 mins  
Kern County
SPS.gif   SPECIAL WEATHER STATEMENT  
At 350 PM PDT, Doppler radar was tracking a strong thunderstorm 21
  Areas affected: Sequoia NP; South End of the Upper Sierra
Effective: Sep 21 3:53 pm Expired: Sep 21 4:15 pm Duration: 0 hrs   22 mins  
Tulare County
SPS.gif   SPECIAL WEATHER STATEMENT  
At 350 PM PDT, Doppler radar was tracking a strong thunderstorm 21
  Areas affected: Sequoia NP; South End of the Upper Sierra
Effective: Sep 21 3:53 pm Expired: Sep 21 4:15 pm Duration: 0 hrs   22 mins  


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