California County Alert Archives from the National Weather Service

Alert Archives for All California Counties

If there's no Alerts for the day, there's no log file

Select a date: 22 total alerts issued on this day Updates Every 15 Minutes
Alert Summary \| Alert RSS Feed \| Alert Archives \| Icon key Last Update:May 20, 2026 - 7:00 am PDT

Orange County

AIR QUALITY ALERT (3 updates)
Areas affected: Santa Ana Mountains and Foothills; Orange County Coastal; Orange County Inland
Effective: May 19 11:05 pm	Expired: May 20 4:30 pm	Duration: 17 hrs 25 mins
Areas affected: Santa Ana Mountains and Foothills; Orange County Coastal; Orange County Inland
Effective: May 19 9:42 pm	Expired: May 20 9:45 pm	Duration: 1 day 0 hrs 03 mins
Areas affected: Santa Ana Mountains and Foothills; Orange County Coastal; Orange County Inland
Effective: May 19 9:37 pm	Expired: May 20 9:45 pm	Duration: 1 day 0 hrs 08 mins

Riverside County

AIR QUALITY ALERT (8 updates)
Areas affected: Santa Ana Mountains and Foothills; Orange County Coastal; Orange County Inland
Effective: May 19 11:05 pm	Expired: May 20 4:30 pm	Duration: 17 hrs 25 mins
Areas affected: Santa Ana Mountains and Foothills; Orange County Coastal; Orange County Inland
Effective: May 19 9:42 pm	Expired: May 20 9:45 pm	Duration: 1 day 0 hrs 03 mins
Areas affected: Santa Ana Mountains and Foothills; Orange County Coastal; Orange County Inland
Effective: May 19 9:37 pm	Expired: May 20 9:45 pm	Duration: 1 day 0 hrs 08 mins
Areas affected: San Bernardino and Riverside County Valleys-The Inland Empire
Effective: May 19 11:05 pm	Expired: May 20 4:30 pm	Duration: 17 hrs 25 mins
Areas affected: San Bernardino and Riverside County Valleys-The Inland Empire
Effective: May 19 11:05 pm	Expired: May 20 4:30 pm	Duration: 17 hrs 25 mins
Areas affected: San Bernardino and Riverside County Valleys-The Inland Empire
Effective: May 19 10:52 pm	Expired: May 20 4:30 pm	Duration: 17 hrs 38 mins
Areas affected: San Bernardino and Riverside County Valleys-The Inland Empire
Effective: May 19 9:42 pm	Expired: May 20 9:45 pm	Duration: 1 day 0 hrs 03 mins
Areas affected: San Bernardino and Riverside County Valleys-The Inland Empire
Effective: May 19 9:37 pm	Expired: May 20 9:45 pm	Duration: 1 day 0 hrs 08 mins

San Diego County

AIR QUALITY ALERT (3 updates)
Areas affected: Santa Ana Mountains and Foothills; Orange County Coastal; Orange County Inland
Effective: May 19 11:05 pm	Expired: May 20 4:30 pm	Duration: 17 hrs 25 mins
Areas affected: Santa Ana Mountains and Foothills; Orange County Coastal; Orange County Inland
Effective: May 19 9:42 pm	Expired: May 20 9:45 pm	Duration: 1 day 0 hrs 03 mins
Areas affected: Santa Ana Mountains and Foothills; Orange County Coastal; Orange County Inland
Effective: May 19 9:37 pm	Expired: May 20 9:45 pm	Duration: 1 day 0 hrs 08 mins

San Bernardino County

AIR QUALITY ALERT (5 updates)
Areas affected: San Bernardino and Riverside County Valleys-The Inland Empire
Effective: May 19 11:05 pm	Expired: May 20 4:30 pm	Duration: 17 hrs 25 mins
Areas affected: San Bernardino and Riverside County Valleys-The Inland Empire
Effective: May 19 11:05 pm	Expired: May 20 4:30 pm	Duration: 17 hrs 25 mins
Areas affected: San Bernardino and Riverside County Valleys-The Inland Empire
Effective: May 19 10:52 pm	Expired: May 20 4:30 pm	Duration: 17 hrs 38 mins
Areas affected: San Bernardino and Riverside County Valleys-The Inland Empire
Effective: May 19 9:42 pm	Expired: May 20 9:45 pm	Duration: 1 day 0 hrs 03 mins
Areas affected: San Bernardino and Riverside County Valleys-The Inland Empire
Effective: May 19 9:37 pm	Expired: May 20 9:45 pm	Duration: 1 day 0 hrs 08 mins

Ventura County

AIR QUALITY ALERT (2 updates)
Areas affected: Western San Fernando Valley; Eastern San Fernando Valley; Santa Susana Mountains; Los Angeles County San Gabriel Valley
Effective: May 19 9:43 pm	Expired: May 20 5:30 pm	Duration: 19 hrs 47 mins
Areas affected: Santa Susana Mountains
Effective: May 19 6:15 pm	Expired: May 20 4:30 pm	Duration: 22 hrs 15 mins

Imperial County

AIR QUALITY ALERT
Areas affected: Imperial Valley
Effective: May 20 10:06 am	Expired: May 21 8:00 pm	Duration: 1 day 9 hrs 54 mins

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