Heavy Snow Warnings in the United States
838 heavy snow warnings since 1986. Each alert counts once, however many counties it covered. The archive of heavy snow warnings reaches back to 2005.
Heavy Snow Warnings by state
Each state shaded by its count. Tap a state for its own archive.
- Heavy Snow Warnings
- 838
- Busiest year
- 2007292 heavy snow warnings
- Average year
- 210over 4 years on file
- Busiest day
- December 14, 200712 heavy snow warnings
Over time
By year
Before late 2005 the archive holds only tornado, severe thunderstorm, flash flood and marine warnings, and from 1997 SPC's watches, so the jump that year is the archive widening, not the weather.
By month of the year
By state
Every state and territory, with the alerts that covered any part of it. Each state’s page lists every one of them.
- Idaho129
- Montana116
- Washington111
- Oregon71
- Alaska61
- California54
- Utah51
- Colorado44
- Michigan42
- New York29
- Minnesota29
- West Virginia24
- Maine23
- Pennsylvania22
- Nevada21
- Kansas21
- Wisconsin21
- Connecticut20
- New Hampshire19
- Massachusetts17
- Virginia16
- Vermont15
- North Dakota15
- Maryland15
- Indiana14
- New Mexico13
- North Carolina12
- Iowa12
- South Dakota12
- Wyoming12
- Missouri11
- Texas11
- Kentucky11
- Ohio10
- Nebraska10
- Tennessee9
- Illinois8
- New Jersey7
- Arizona7
- Alabama4
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
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.