Severe Thunderstorm Watches in Maryland
647 severe thunderstorm watches 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 watches reaches back to 1997.
Severe Thunderstorm Watches by county
Each county as a circle sized by its count since 1986. Tap one for its archive.
- Severe Thunderstorm Watches
- 647
- Busiest year
- 202636 severe thunderstorm watches
- Average year
- 22over 30 years on file
Over time
By year
Watches are counted from 1997, when the Storm Prediction Center archive begins.
By month of the year
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Howard County336
- Montgomery County335
- Prince George's County331
- City of Baltimore325
- Baltimore County324
- Carroll County323
- Charles County323
- Harford County323
- Frederick County321
- Anne Arundel County320
- Calvert County304
- Cecil County301
- Saint Mary's County291
- Kent County285
- Queen Anne's County280
- Talbot County272
- Caroline County268
- Washington County266
- Allegany County206
- Dorchester County199
- Wicomico County187
- Somerset County186
- Garrett County179
- Worcester County170
The latest severe thunderstorm watches
The most recent on file, newest first.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 4, 2:04 PM EDT | Severe Thunderstorm Watch | SPC | Allegany, Calvert, Charles, Frederick, Garrett, Montgomery and 3 more | 7 hr |
| Sep 3, 8:38 PM EDT | Severe Thunderstorm Watch | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 16 more | 5 hr |
| Sep 3, 4:33 PM EDT | Severe Thunderstorm Watch | SPC | Allegany, Garrett | 6 hr |
| Sep 2, 11:46 AM EDT | Severe Thunderstorm Watch | SPC | Allegany, Anne Arundel, Baltimore, Calvert, Caroline, Carroll and 13 more | 5 hr |
| Sep 1, 4:32 PM EDT | Severe Thunderstorm Watch | SPC | Caroline, Cecil, Harford, Kent, Queen Anne's, Talbot | 7 hr |
| Aug 27, 3:17 PM EDT | Severe Thunderstorm Watch | SPC | Anne Arundel, Baltimore, Calvert, Carroll, Cecil, Charles and 8 more | 7 hr |
| Aug 20, 2:31 PM EDT | Severe Thunderstorm Watch | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 15 more | 7 hr |
| Aug 16, 4:36 PM EDT | Severe Thunderstorm Watch | SPC | Allegany, Carroll, Charles, Frederick, Garrett, Howard and 3 more | 6 hr |
| Aug 10, 4:25 PM EDT | Severe Thunderstorm Watch | SPC | Dorchester, Somerset, Wicomico, Worcester | 5 hr |
| Aug 10, 2:10 PM EDT | Severe Thunderstorm Watch | SPC | Caroline, Kent, Queen Anne's, Talbot | 6 hr |
| Aug 10, 1:13 PM EDT | Severe Thunderstorm Watch | SPC | Allegany, Anne Arundel, Baltimore, Calvert, Carroll, Cecil and 10 more | 7 hr |
| Aug 8, 1:12 PM EDT | Severe Thunderstorm Watch | SPC | Caroline, Kent, Queen Anne's, Talbot | 5 hr |
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. Warning verification from the Mesonet's Cow. Rebuilt daily.