Alert archive / Mesoscale Discussions / 2017
Mesoscale Discussions in the United States, December 2017
37 mesoscale discussions in December 2017. 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
- 37
- Busiest day
- December 8, 20177 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.
- Texas340
- Kansas228
- Oklahoma223
- Missouri209
- Louisiana154
- Arkansas154
- Illinois154
- Nebraska150
- Georgia150
- Mississippi146
- Alabama136
- Indiana136
- Iowa128
- Florida125
- Pennsylvania123
- Kentucky121
- Minnesota114
- South Dakota114
- Tennessee108
- North Carolina108
- Ohio106
- Virginia105
- New York103
- Wisconsin96
- Colorado92
- South Carolina89
- West Virginia85
- Michigan73
- New Mexico72
- Maryland62
- North Dakota57
- New Jersey51
- Massachusetts47
- Vermont47
- New Hampshire46
- Wyoming39
- Montana38
- Connecticut38
- Maine36
- Delaware33
Nearby
Alerts in force nowThe tornado archiveThe radar archive20162018
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.