Weather alerts in California, 2018

3,106 weather alerts in 2018, 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 2018. Tap one for its archive.

Alerts: 3,106
Warnings: 692
Watches: 373
Advisories: 1,622
Busiest month: July440 alerts
Busiest day: March 22, 201859 alerts

Over time

By month

The alerts

3,106 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	71
Tornado Warning	3
Mesoscale Discussion	2
Special Weather Statement	362
Flooding
Areal Flood Warning	3
Flash Flood Warning	149
River Flood Warning	8
Flash Flood Watch	44
Flood Watch	10
Areal Flood Advisory	269
River Flood Advisory	1
Winter
Blizzard Warning	1
Winter Storm Warning	55
Winter Storm Watch	50
Winter Weather Advisory	120
Heat
Excessive Heat Warning	35
Excessive Heat Watch	32
Heat Advisory	38
Cold
Freeze Warning	53
Hard Freeze Warning	12
Freeze Watch	26
Hard Freeze Watch	8
Frost Advisory	78
Wind and dust
Dust Storm Warning	14
High Wind Warning	41
High Wind Watch	34
Blowing Dust Advisory	11
Dust Storm Advisory	23
Lake Wind Advisory	46
Wind Advisory	280
Fire
Red Flag Warning	105
Fire Weather Watch	87
Fog and smoke
Dense Fog Advisory	92
Dense Smoke Advisory	4
Freezing Fog Advisory	3
Coast and beach
High Surf Warning	7
Tsunami Watch	1
Coastal Flood Advisory	18
High Surf Advisory	45
Beach Hazards Statement	54
Coastal Flood Statement	1
Marine
Gale Warning	99
Hazardous Seas Warning	21
Special Marine Warning	15
Gale Watch	78
Hazardous Seas Watch	3
Marine Dense Fog Advisory	3
Small Craft Advisory	543
Small Craft Advisory for Hazardous Seas	27
Small Craft Advisory for Rough Bar	19
Small Craft Advisory for Winds	2

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 2017 2019

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.