Alert archive / Winter Weather Advisories
Winter Weather Advisories in the United States, 2020
1,996 winter weather advisories in 2020. Each alert counts once, however many counties it covered. The archive of winter weather advisories reaches back to 2005.
Winter Weather Advisories by state
Each state shaded by its count. Tap a state for its own archive.
- Winter Weather Advisories
- 1,996
- Busiest month
- January459 winter weather advisories
- Busiest day
- January 10, 202038 winter weather advisories
Over time
By month
By state
Every state and territory, with the alerts that covered any part of it. Each state’s page lists every one of them.
- Alaska239
- Montana178
- Washington130
- Idaho115
- Wyoming115
- California113
- Colorado108
- Kansas104
- Nebraska103
- Iowa98
- Minnesota97
- Oregon95
- Michigan92
- New York90
- Wisconsin80
- Pennsylvania65
- South Dakota65
- Missouri59
- Texas56
- Maine54
- West Virginia53
- Illinois48
- Indiana47
- Ohio46
- Nevada43
- Oklahoma41
- Virginia39
- New Mexico39
- North Dakota37
- North Carolina37
- Utah34
- Vermont29
- Kentucky28
- Massachusetts24
- Maryland20
- Tennessee20
- New Hampshire20
- Connecticut19
- Arkansas16
- Arizona11
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowThe tornado archiveThe radar archive20192021
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.