Weather alerts in California, 2007

1,564 weather alerts in 2007, 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 2007. Tap one for its archive.

Alerts: 1,564
Warnings: 545
Watches: 293
Advisories: 651
Busiest month: December248 alerts
Busiest day: August 31, 200728 alerts

Over time

By month

The alerts

1,564 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	95
Tornado Warning	7
Mesoscale Discussion	7
Flooding
Flash Flood Warning	105
Flash Flood Watch	38
Flood Watch	1
Winter
Heavy Snow Warning	14
Winter Storm Warning	34
Winter Storm Watch	52
Snow Advisory	96
Snow and Blowing Snow Advisory	18
Winter Weather Advisory	16
Heat
Excessive Heat Warning	20
Excessive Heat Watch	11
Heat Advisory	9
Cold
Freeze Warning	46
Hard Freeze Warning	2
Freeze Watch	20
Wind Chill Watch	1
Frost Advisory	65
Wind Chill Advisory	4
Wind and dust
Dust Storm Warning	5
High Wind Warning	63
High Wind Watch	59
Blowing Dust Advisory	1
Lake Wind Advisory	41
Wind Advisory	276
Fire
Red Flag Warning	140
Fire Weather Watch	111
Fog and smoke
Dense Fog Advisory	75
Dense Smoke Advisory	5
Coast and beach
High Surf Warning	3
Coastal Flood Advisory	4
High Surf Advisory	41
Coastal Flood Statement	11
Marine
Special Marine Warning	11
Marine Weather Statement	57

By county

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

6 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 2006 2008

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.