Weather alerts in California, 2023

5,119 weather alerts in 2023, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered any part of the state, so the counties below add up to more than the state.

Weather alerts by county

Each county as a circle sized by its count in 2023. Tap one for its archive.

Alerts: 5,119
Warnings: 1,281
Watches: 491
Advisories: 2,223
Busiest month: January904 alerts
Busiest day: January 10, 2023167 alerts

Over time

By month

The alerts

5,119 alerts are too many to list on one page. Narrow it to a product above, to a month in the chart, or to a county.

By product

Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.

Product	Alerts
Severe storms
Severe Thunderstorm Warning	91
Tornado Warning	16
Mesoscale Discussion	17
Special Weather Statement	1,035
Flooding
Areal Flood Warning	103
Flash Flood Warning	240
River Flood Warning	72
Flash Flood Watch	15
Flood Watch	78
River Flood Watch	16
Areal Flood Advisory	587
River Flood Advisory	7
Winter
Blizzard Warning	6
Winter Storm Warning	80
Winter Storm Watch	76
Winter Weather Advisory	148
Heat
Excessive Heat Warning	30
Excessive Heat Watch	30
Heat Advisory	44
Cold
Freeze Warning	84
Hard Freeze Warning	22
Freeze Watch	42
Hard Freeze Watch	8
Frost Advisory	106
Wind Chill Advisory	1
Wind and dust
Blowing Dust Warning	2
Dust Storm Warning	10
High Wind Warning	80
High Wind Watch	55
Blowing Dust Advisory	8
Dust Storm Advisory	17
Lake Wind Advisory	27
Wind Advisory	413
Fire
Red Flag Warning	40
Fire Weather Watch	25
Fog and smoke
Air Stagnation Advisory	4
Dense Fog Advisory	124
Freezing Fog Advisory	1
Tropical
Tropical Storm Warning	2
Tropical Storm Watch	2
Coast and beach
Coastal Flood Warning	5
High Surf Warning	12
Coastal Flood Advisory	54
High Surf Advisory	60
Beach Hazards Statement	72
Marine
Gale Warning	174
Hazardous Seas Warning	42
Special Marine Warning	160
Storm Warning	10
Gale Watch	128
Hazardous Seas Watch	9
Storm Watch	7
Marine Dense Fog Advisory	19
Small Craft Advisory	603

By county

Every county with at least one alert. A county page lists each alert that covered it.

18 more counties

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record The radar archive 2022 2024

Sources

National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Rebuilt daily.