Alert archive / Winter Storm Watches
Winter Storm Watches in the United States, 2009
719 winter storm watches in 2009. Each alert counts once, however many counties it covered. The archive of winter storm watches reaches back to 2005.
Winter Storm Watches by state
Each state shaded by its count. Tap a state for its own archive.
- Winter Storm Watches
- 719
- Busiest month
- December175 winter storm watches
- Busiest day
- December 21, 200924 winter storm watches
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.
- Colorado64
- California52
- Washington50
- Idaho49
- Wyoming45
- Montana44
- Nebraska41
- Minnesota39
- Michigan33
- New York32
- Wisconsin31
- Oregon30
- Alaska30
- Kansas30
- South Dakota27
- Iowa27
- West Virginia26
- Pennsylvania25
- New Mexico25
- Virginia23
- Utah23
- North Carolina22
- Maine22
- Texas20
- North Dakota19
- Massachusetts17
- Illinois17
- Missouri17
- Maryland17
- New Hampshire16
- Nevada16
- Connecticut15
- Ohio13
- New Jersey12
- Oklahoma12
- Indiana11
- Arkansas11
- Vermont11
- Arizona10
- Tennessee8
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.