Northern California County Alert Archives from the National Weather Service

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Alert Archives for All California Counties

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Select a date: 15 total alerts issued on this day Updates Every 15 Minutes
Alert Summary \| Alert RSS Feed \| Alert Archives \| Icon key Last Update:April 23, 2026 - 7:00 am PDT

Del Norte County

FROST ADVISORY
Areas affected: Interior Del Norte; Northern Coastal Humboldt; Southwestern Humboldt; Northeastern Interior Humboldt; Southeastern Interior Humboldt; Coastal Mendocino; Northwestern Interior Mendocino; Southwestern Interior Mendocino; Southeastern Interior Mendocino; Western Lake; Southwestern Lake; Eastern Lake
Effective: Apr 22 11:03 pm	Expired: Apr 23 8:00 am	Duration: 8 hrs 57 mins

Humboldt County

FROST ADVISORY
Areas affected: Interior Del Norte; Northern Coastal Humboldt; Southwestern Humboldt; Northeastern Interior Humboldt; Southeastern Interior Humboldt; Coastal Mendocino; Northwestern Interior Mendocino; Southwestern Interior Mendocino; Southeastern Interior Mendocino; Western Lake; Southwestern Lake; Eastern Lake
Effective: Apr 22 11:03 pm	Expired: Apr 23 8:00 am	Duration: 8 hrs 57 mins

Lake County 2 alerts

FROST ADVISORY
Areas affected: Interior Del Norte; Northern Coastal Humboldt; Southwestern Humboldt; Northeastern Interior Humboldt; Southeastern Interior Humboldt; Coastal Mendocino; Northwestern Interior Mendocino; Southwestern Interior Mendocino; Southeastern Interior Mendocino; Western Lake; Southwestern Lake; Eastern Lake
Effective: Apr 22 11:03 pm	Expired: Apr 23 8:00 am	Duration: 8 hrs 57 mins

FREEZE WARNING
Areas affected: Southern Trinity; Northeastern Interior Mendocino; Northern Lake; Northeastern Trinity
Effective: Apr 22 11:03 pm	Expired: Apr 23 8:00 am	Duration: 8 hrs 57 mins

Mendocino County 2 alerts

FROST ADVISORY
Areas affected: Interior Del Norte; Northern Coastal Humboldt; Southwestern Humboldt; Northeastern Interior Humboldt; Southeastern Interior Humboldt; Coastal Mendocino; Northwestern Interior Mendocino; Southwestern Interior Mendocino; Southeastern Interior Mendocino; Western Lake; Southwestern Lake; Eastern Lake
Effective: Apr 22 11:03 pm	Expired: Apr 23 8:00 am	Duration: 8 hrs 57 mins

FREEZE WARNING
Areas affected: Southern Trinity; Northeastern Interior Mendocino; Northern Lake; Northeastern Trinity
Effective: Apr 22 11:03 pm	Expired: Apr 23 8:00 am	Duration: 8 hrs 57 mins

Kern County

WIND ADVISORY
Areas affected: Mojave Desert Slopes
Effective: Apr 22 10:27 pm	Expired: Apr 23 5:00 am	Duration: 6 hrs 33 mins

Trinity County

FREEZE WARNING (2 updates)
Areas affected: Southern Trinity; Northeastern Interior Mendocino; Northern Lake; Northeastern Trinity
Effective: Apr 22 11:03 pm	Expired: Apr 23 8:00 am	Duration: 8 hrs 57 mins
Areas affected: Northwestern and Central Trinity
Effective: Apr 22 11:03 pm	Expired: Apr 23 9:00 am	Duration: 9 hrs 57 mins

Northern Lake County

FREEZE WARNING
Areas affected: Southern Trinity; Northeastern Interior Mendocino; Northern Lake; Northeastern Trinity
Effective: Apr 22 11:03 pm	Expired: Apr 23 8:00 am	Duration: 8 hrs 57 mins

Riverside County

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

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