Alert archive / Maryland / Severe Thunderstorm Watches
Severe Thunderstorm Watches in Maryland, 2021
23 severe thunderstorm watches in 2021. 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 in 2021. Tap one for its archive.
- Severe Thunderstorm Watches
- 23
- Busiest month
- June7 severe thunderstorm watches
- Busiest day
- June 14, 20212 severe thunderstorm watches
Over time
By month
The alerts
Every alert, in the order issued. Times are local, Eastern Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 28, 5:05 PM EDT | Severe Thunderstorm Watch | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 10 more | 4 hr |
| Apr 21, 12:28 PM EDT | Severe Thunderstorm Watch | SPC | Anne Arundel, Calvert, Caroline, Cecil, Dorchester, Kent and 6 more | 5 hr |
| May 4, 1:51 PM EDT | Severe Thunderstorm Watch | SPC | Anne Arundel, Baltimore, Calvert, Carroll, Cecil, Charles and 8 more | 6 hr |
| May 26, 2:48 PM EDT | Severe Thunderstorm Watch | SPC | Allegany, Anne Arundel, Baltimore, Calvert, Caroline, Carroll and 18 more | 7 hr |
| Jun 3, 2:48 PM EDT | Severe Thunderstorm Watch | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 16 more | 6 hr |
| Jun 4, 12:59 PM EDT | Severe Thunderstorm Watch | SPC | Calvert, Charles, Dorchester, Saint Mary's, Somerset, Wicomico | 7 hr |
| Jun 14, 3:59 PM EDT | Severe Thunderstorm Watch | SPC | Allegany, Garrett, Washington | 6 hr |
| Jun 14, 7:29 PM EDT | Severe Thunderstorm Watch | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 15 more | 6 hr |
| Jun 21, 2:20 PM EDT | Severe Thunderstorm Watch | SPC | Allegany, Anne Arundel, Baltimore, Calvert, Carroll, Cecil and 9 more | 6 hr |
| Jun 21, 4:33 PM EDT | Severe Thunderstorm Watch | SPC | Caroline, Kent, Queen Anne's, Talbot | 6 hr |
| Jun 30, 4:51 PM EDT | Severe Thunderstorm Watch | SPC | Allegany, Carroll, Frederick, Washington | 3 hr |
| Jul 1, 12:46 PM EDT | Severe Thunderstorm Watch | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 15 more | 7 hr |
| Jul 6, 1:32 PM EDT | Severe Thunderstorm Watch | SPC | Cecil, Harford, Kent | 8 hr |
| Jul 11, 2:40 PM EDT | Severe Thunderstorm Watch | SPC | Allegany, Garrett | 8 hr |
| Jul 12, 3:34 PM EDT | Severe Thunderstorm Watch | SPC | Baltimore, Carroll, Cecil, Frederick, Harford, Howard and 2 more | 5 hr |
| Jul 17, 1:13 PM EDT | Severe Thunderstorm Watch | SPC | Allegany, Anne Arundel, Baltimore, Calvert, Caroline, Carroll and 14 more | 10 hr |
| Jul 21, 11:56 AM EDT | Severe Thunderstorm Watch | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 16 more | 7 hr |
| Jul 29, 3:00 PM EDT | Severe Thunderstorm Watch | SPC | Allegany, Calvert, Charles, Dorchester, Garrett, Montgomery and 5 more | 6 hr |
| Aug 11, 2:02 PM EDT | Severe Thunderstorm Watch | SPC | Allegany, Anne Arundel, Baltimore, Calvert, Carroll, Cecil and 9 more | 6 hr |
| Aug 11, 3:02 PM EDT | Severe Thunderstorm Watch | SPC | Caroline, Kent, Queen Anne's, Talbot | 6 hr |
| Aug 13, 1:11 PM EDT | Severe Thunderstorm Watch | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 13 more | 7 hr |
| Sep 8, 8:29 PM EDT | Severe Thunderstorm Watch | SPC | Anne Arundel, Baltimore, Carroll, Cecil, Frederick, Harford and 5 more | 4 hr |
| Oct 25, 6:26 PM EDT | Severe Thunderstorm Watch | SPC | Calvert, Charles, Saint Mary's | 4 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Calvert County15
- Cecil County15
- Carroll County14
- Charles County14
- Harford County14
- Montgomery County14
- Saint Mary's County14
- Anne Arundel County13
- Baltimore County13
- Howard County13
- Prince George's County13
- City of Baltimore13
- Frederick County13
- Kent County12
- Caroline County11
- Queen Anne's County11
- Talbot County11
- Washington County11
- Dorchester County9
- Somerset County8
- Wicomico County8
- Allegany County8
- Worcester County7
- Garrett County6
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe 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. Warning verification from the Mesonet's Cow. Rebuilt daily.