Weather alerts in the United States, 2021

121,189 weather alerts in 2021, 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: 121,189
Warnings: 41,367
Watches: 4,611
Advisories: 26,917
Busiest month: July21,113 alerts
Busiest day: August 11, 20211,173 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
Extreme Wind Warning	4
Severe Thunderstorm Warning	16,161
Tornado Warning	2,445
Severe Thunderstorm Watch	395
Tornado Watch	177
Mesoscale Discussion	2,087
Special Weather Statement	44,980
Flooding
Areal Flood Warning	1,545
Flash Flood Warning	4,734
River Flood Warning	3,718
Flash Flood Watch	699
Flood Watch	205
River Flood Watch	125
Areal Flood Advisory	10,666
River Flood Advisory	488
Winter
Blizzard Warning	95
Ice Storm Warning	27
Lake Effect Snow Warning	20
Snow Squall Warning	126
Winter Storm Warning	656
Winter Storm Watch	585
Winter Weather Advisory	2,162
Heat
Excessive Heat Warning	167
Excessive Heat Watch	114
Heat Advisory	694
Cold
Freeze Warning	510
Hard Freeze Warning	65
Wind Chill Warning	103
Freeze Watch	253
Hard Freeze Watch	21
Wind Chill Watch	23
Frost Advisory	586
Wind Chill Advisory	401
Wind and dust
Blowing Dust Warning	9
Dust Storm Warning	99
High Wind Warning	615
High Wind Watch	439
Blowing Dust Advisory	51
Dust Storm Advisory	97
Lake Wind Advisory	246
Wind Advisory	1,682
Fire
Red Flag Warning	1,137
Fire Weather Watch	775
Fog and smoke
Air Stagnation Advisory	3
Dense Fog Advisory	1,602
Dense Smoke Advisory	1
Freezing Fog Advisory	82
Tropical
Hurricane Warning	7
Storm Surge Warning	12
Tropical Storm Warning	46
Hurricane Watch	8
Storm Surge Watch	11
Tropical Storm Watch	39
Hurricane Local Statement	1
Coast and beach
Coastal Flood Warning	50
High Surf Warning	28
Lakeshore Flood Warning	16
Tsunami Warning	2
Coastal Flood Watch	34
Lakeshore Flood Watch	7
Tsunami Watch	1
Coastal Flood Advisory	558
High Surf Advisory	220
Lakeshore Flood Advisory	53
Tsunami Advisory	2
Beach Hazards Statement	457
Coastal Flood Statement	182
Rip Current Statement	587
Marine
Gale Warning	2,391
Hazardous Seas Warning	154
Heavy Freezing Spray Warning	325
Hurricane Force Wind Warning	18
Special Marine Warning	5,726
Storm Warning	356
Gale Watch	615
Hazardous Seas Watch	48
Heavy Freezing Spray Watch	2
Storm Watch	35
Brisk Wind Advisory	323
Heavy Freezing Spray Advisory	24
Low Water Advisory	48
Marine Dense Fog Advisory	479
Small Craft Advisory	6,449

By state

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

15 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 2020 2022

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.