Weather alerts in the United States, 2011

117,134 weather alerts in 2011, from the National Weather Service and the Storm Prediction Center. Each alert counts once, however many counties it covered.

Weather alerts by state

Each state shaded by its count. Tap a state for its own archive.

Alerts: 117,134
Warnings: 52,468
Watches: 5,542
Advisories: 24,403
Busiest month: June17,970 alerts
Busiest day: April 27, 20111,581 alerts

Over time

By month

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	25,489
Tornado Warning	4,643
Severe Thunderstorm Watch	575
Tornado Watch	327
Mesoscale Discussion	2,390
Special Weather Statement	31,939
Flooding
Areal Flood Warning	1,987
Flash Flood Warning	3,745
River Flood Warning	4,445
Flash Flood Watch	498
Flood Watch	368
River Flood Watch	320
Areal Flood Advisory	7,157
Hydrologic Advisory	1
River Flood Advisory	828
Hydrologic Statement	2
Winter
Blizzard Warning	141
Ice Storm Warning	9
Lake Effect Snow Warning	51
Winter Storm Warning	792
Blizzard Watch	55
Lake Effect Snow Watch	33
Winter Storm Watch	665
Freezing Rain Advisory	118
Lake Effect Snow Advisory	106
Winter Weather Advisory	2,168
Heat
Excessive Heat Warning	158
Excessive Heat Watch	107
Heat Advisory	613
Cold
Extreme Cold Warning	2
Freeze Warning	480
Hard Freeze Warning	96
Wind Chill Warning	78
Freeze Watch	214
Hard Freeze Watch	32
Wind Chill Watch	18
Frost Advisory	529
Wind Chill Advisory	431
Wind and dust
Dust Storm Warning	37
High Wind Warning	716
High Wind Watch	457
Blowing Dust Advisory	25
Lake Wind Advisory	516
Wind Advisory	2,185
Fire
Red Flag Warning	1,651
Fire Weather Watch	1,189
Fog and smoke
Air Stagnation Advisory	17
Dense Fog Advisory	1,188
Dense Smoke Advisory	45
Freezing Fog Advisory	50
Air Stagnation Outlook	3
Tropical
Hurricane Warning	9
Tropical Storm Warning	29
Hurricane Watch	7
Tropical Storm Watch	24
Hurricane Local Statement	9
Coast and beach
Coastal Flood Warning	52
High Surf Warning	11
Lakeshore Flood Warning	9
Tsunami Warning	3
Coastal Flood Watch	35
Lakeshore Flood Watch	2
Coastal Flood Advisory	292
High Surf Advisory	235
Lakeshore Flood Advisory	12
Tsunami Advisory	1
Coastal Flood Statement	186
Lakeshore Flood Statement	5
Rip Current Statement	182
Marine
Gale Warning	2,698
Hazardous Seas Warning	71
Heavy Freezing Spray Warning	302
Hurricane Force Wind Warning	47
Special Marine Warning	4,227
Storm Warning	490
Gale Watch	523
Hazardous Seas Watch	47
Heavy Freezing Spray Watch	6
Storm Watch	40
Brisk Wind Advisory	261
Heavy Freezing Spray Advisory	3
Low Water Advisory	35
Marine Dense Fog Advisory	323
Marine Dense Smoke Advisory	7
Small Craft Advisory	5,853
Small Craft Advisory for Hazardous Seas	636
Small Craft Advisory for Rough Bar	320
Small Craft Advisory for Winds	448
Marine Weather Statement	5

By state

Every state and territory, with the alerts that covered any part of it. Each state’s page lists every one of them.

14 more states

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now The tornado archive The radar archive 2010 2012

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.