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: 4 total alerts issued on this day Updates Every 15 Minutes
Alert Summary \| Alert RSS Feed \| Alert Archives \| Icon key Last Update:May 21, 2026 - 7:00 am PDT

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

Riverside County

AIR QUALITY ALERT
Areas affected: San Bernardino and Riverside County Valleys-The Inland Empire
Effective: May 20 5:44 pm	Expired: May 21 5:45 pm	Duration: 1 day 0 hrs 01 min

San Bernardino County

AIR QUALITY ALERT
Areas affected: San Bernardino and Riverside County Valleys-The Inland Empire
Effective: May 20 5:44 pm	Expired: May 21 5:45 pm	Duration: 1 day 0 hrs 01 min

Ventura County

AIR QUALITY ALERT
Areas affected: Eastern San Fernando Valley; Eastern San Gabriel Mountains; Los Angeles County San Gabriel Valley; Santa Clarita Valley; Santa Susana Mountains; Western San Fernando Valley; Western San Gabriel Mountains and Highway 14 Corridor
Effective: May 20 3:59 pm	Expired: May 21 10:00 pm	Duration: 1 day 6 hrs 01 min

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