Alert archive / Mesoscale Discussions / 2021
Mesoscale Discussions in the United States, May 2021
361 mesoscale discussions in May 2021. 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
- 361
- Busiest day
- May 4, 202133 mesoscale discussions
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.
- Texas410
- Missouri216
- Kansas210
- Oklahoma200
- Nebraska179
- Mississippi161
- Illinois154
- Arkansas152
- Alabama150
- Pennsylvania143
- Minnesota137
- Florida135
- Iowa133
- Louisiana131
- Georgia127
- South Dakota126
- New York118
- Virginia116
- Tennessee113
- Wisconsin106
- Indiana97
- Colorado96
- Kentucky95
- Maryland92
- New Jersey86
- North Carolina82
- Michigan81
- Ohio77
- New Mexico71
- West Virginia66
- Massachusetts59
- North Dakota58
- South Carolina54
- Delaware54
- Wyoming51
- Connecticut48
- Montana47
- Vermont41
- New Hampshire36
- Rhode Island36
Nearby
Alerts in force nowThe tornado archiveThe radar archive20202022
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.