Severe Thunderstorm Warnings in Maryland
7,176 severe thunderstorm warnings since 1986. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of severe thunderstorm warnings reaches back to 1986.
Severe Thunderstorm Warnings by county
Each county as a circle sized by its count since 1986. Tap one for its archive.
- Severe Thunderstorm Warnings
- 7,176
- Busiest year
- 2019462 severe thunderstorm warnings
- Average year
- 175over 41 years on file
Over time
By year
Before October 2007 these were issued for whole counties, and a storm crossing three counties was often three warnings; since then one polygon follows the storm. The count changed with the practice, not only with the weather.
By month of the year
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Prince George's County1,126
- Montgomery County1,051
- Baltimore County869
- Frederick County866
- Anne Arundel County858
- Washington County766
- Charles County759
- Queen Anne's County662
- Howard County643
- Carroll County605
- Harford County599
- Caroline County596
- Kent County533
- Calvert County523
- Cecil County523
- Talbot County521
- Saint Mary's County497
- City of Baltimore408
- Allegany County393
- Garrett County336
- Dorchester County323
- Wicomico County319
- Worcester County267
- Somerset County261
The latest severe thunderstorm warnings
The most recent on file, newest first.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 4, 4:23 PM EDT | Severe Thunderstorm Warning | LWX | Charles, Prince George's | 27 min |
| Sep 4, 1:19 PM EDT | Severe Thunderstorm Warning | LWX | Garrett | 41 min |
| Sep 4, 2:18 AM EDT | Severe Thunderstorm Warning | AKQ | Somerset | 27 min |
| Sep 4, 12:52 AM EDT | Severe Thunderstorm Warning | PHI | Caroline, Talbot | 53 min |
| Sep 4, 12:18 AM EDT | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's, Talbot | 42 min |
| Sep 3, 11:59 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's, Talbot | 61 min |
| Sep 3, 11:56 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Calvert, Prince George's | 49 min |
| Sep 3, 11:37 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery, Prince George's | 38 min |
| Sep 3, 11:13 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 47 min |
| Sep 3, 10:41 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll, Howard | 35 min |
| Sep 3, 10:08 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick, Howard, Montgomery | 52 min |
| Sep 3, 10:03 PM EDT | Severe Thunderstorm Warning | LWX | Garrett | 42 min |
Nearby
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.