Weather alerts in the United States, March 2009

6,318 weather alerts in March 2009, 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: 6,318
Warnings: 3,323
Watches: 578
Advisories: 2,015
Busiest day: March 28, 2009644 alerts

Over time

By day

Days in UTC, the clock the archive keeps.

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	1,044
Tornado Warning	320
Severe Thunderstorm Watch	18
Tornado Watch	38
Mesoscale Discussion	176
Special Weather Statement	185
Flooding
Areal Flood Warning	121
Flash Flood Warning	97
River Flood Warning	663
Flash Flood Watch	34
Flood Watch	32
River Flood Watch	44
Areal Flood Advisory	234
River Flood Advisory	52
Winter
Blizzard Warning	49
Ice Storm Warning	2
Lake Effect Snow Warning	1
Winter Storm Warning	159
Blizzard Watch	29
Winter Storm Watch	132
Freezing Rain Advisory	15
Lake Effect Snow Advisory	4
Winter Weather Advisory	314
Cold
Freeze Warning	31
Hard Freeze Warning	3
Wind Chill Warning	8
Freeze Watch	5
Hard Freeze Watch	2
Wind Chill Watch	1
Frost Advisory	30
Wind Chill Advisory	56
Wind and dust
High Wind Warning	65
High Wind Watch	36
Blowing Dust Advisory	2
Lake Wind Advisory	68
Wind Advisory	318
Fire
Red Flag Warning	206
Fire Weather Watch	157
Fog and smoke
Ashfall Advisory	10
Dense Fog Advisory	137
Dense Smoke Advisory	1
Freezing Fog Advisory	2
Coast and beach
Coastal Flood Warning	1
High Surf Warning	1
Coastal Flood Watch	2
Coastal Flood Advisory	4
High Surf Advisory	24
Lakeshore Flood Advisory	1
Coastal Flood Statement	20
Lakeshore Flood Statement	1
Marine
Gale Warning	276
Hazardous Seas Warning	9
Heavy Freezing Spray Warning	57
Special Marine Warning	167
Storm Warning	43
Gale Watch	40
Hazardous Seas Watch	2
Storm Watch	6
Brisk Wind Advisory	55
Low Water Advisory	5
Marine Dense Fog Advisory	18
Small Craft Advisory	491
Small Craft Advisory for Hazardous Seas	73
Small Craft Advisory for Rough Bar	39
Small Craft Advisory for Winds	62
Marine Weather Statement	20

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

Nearby

Alerts in force now The tornado archive The radar archive 2008 2010

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.