Alert archive / Mesoscale Discussions
Mesoscale Discussions in the United States, 2008
2,546 mesoscale discussions in 2008. Each alert counts once, however many counties it covered. The archive of mesoscale discussions reaches back to 2003.
Mesoscale Discussions by state
Each state shaded by its count. Tap a state for its own archive.
- Mesoscale Discussions
- 2,546
- Busiest month
- June524 mesoscale discussions
- Busiest day
- May 11, 200829 mesoscale discussions
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.
- Texas430
- Missouri381
- Oklahoma358
- Kansas320
- Arkansas282
- Nebraska280
- Illinois261
- Iowa243
- Mississippi213
- South Dakota209
- Georgia207
- Louisiana195
- Alabama190
- Indiana184
- Florida183
- North Carolina176
- Minnesota174
- Virginia165
- Kentucky159
- Tennessee157
- New York145
- Wisconsin144
- Ohio141
- Pennsylvania140
- South Carolina125
- Michigan120
- West Virginia111
- North Dakota109
- Colorado107
- Massachusetts87
- Maryland83
- Vermont82
- New Hampshire81
- Wyoming81
- Montana79
- New Jersey75
- Maine73
- Connecticut66
- New Mexico64
- Delaware41
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowThe tornado archiveThe radar archive20072009
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.