Alert archive / Tornado Watches / 2009
Tornado Watches in the United States, December 2009
25 tornado watches in December 2009. Each alert counts once, however many counties it covered. The archive of tornado watches reaches back to 1997.
Tornado Watches by state
Each state shaded by its count. Tap a state for its own archive.
- Tornado Watches
- 25
- Busiest day
- December 9, 20096 tornado watches
Over time
By day
Days in UTC, the clock the archive keeps.
By state
Every state and territory, with the alerts that covered any part of it. Each state’s page lists every one of them.
- Texas58
- Alabama51
- Georgia49
- Mississippi48
- Oklahoma41
- Kansas41
- Florida38
- Louisiana37
- Arkansas34
- Missouri32
- Tennessee30
- Kentucky24
- Illinois23
- Indiana22
- North Carolina21
- Nebraska21
- South Carolina20
- Iowa19
- Virginia17
- South Dakota13
- Colorado11
- Ohio10
- Minnesota8
- Wyoming7
- Wisconsin7
- West Virginia5
- Michigan4
- North Dakota4
- Maryland4
- Montana2
- Delaware2
- Connecticut1
- New Jersey1
- Pennsylvania1
- Massachusetts1
- Maine1
- New Hampshire1
- New Mexico1
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.