Alert archive / Winter Weather Advisories
Winter Weather Advisories in the United States, 2009
2,037 winter weather advisories in 2009. 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
- 2,037
- Busiest month
- December515 winter weather advisories
- Busiest day
- January 27, 200933 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.
- Alaska154
- Montana152
- Wyoming134
- Colorado127
- California126
- Washington116
- Michigan107
- Idaho100
- Oregon96
- Nebraska93
- Minnesota91
- Iowa89
- West Virginia89
- Wisconsin76
- Kansas76
- New York73
- Pennsylvania73
- Virginia72
- Texas68
- South Dakota67
- North Carolina66
- Utah56
- Indiana54
- Ohio54
- Maryland54
- Nevada51
- Maine50
- New Mexico48
- Illinois47
- North Dakota44
- Missouri37
- Kentucky33
- Massachusetts32
- Tennessee32
- Connecticut30
- New Hampshire30
- Oklahoma28
- Arkansas25
- Vermont24
- Arizona24
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowThe tornado archiveThe radar archive20082010
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.