Alert archive / Maryland / Severe Thunderstorm Warnings / 2021
Severe Thunderstorm Warnings in Maryland, August 2021
95 severe thunderstorm warnings in August 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 warnings reaches back to 1986.
Severe Thunderstorm Warnings by county
Each county as a circle sized by its count in August 2021. Tap one for its archive.
- Severe Thunderstorm Warnings
- 95
- Busiest day
- August 13, 202130 severe thunderstorm warnings
Over time
By day
Days in UTC, the clock the archive keeps.
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 |
|---|---|---|---|---|
| Aug 5, 4:58 PM EDT | Severe Thunderstorm Warning | LWX | Washington | 29 min |
| Aug 9, 3:52 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Harford | 19 min |
| Aug 9, 4:35 PM EDT | Severe Thunderstorm Warning | PHI | Caroline | 40 min |
| Aug 9, 5:12 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's | 20 min |
| Aug 9, 6:19 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel | 41 min |
| Aug 9, 6:23 PM EDT | Severe Thunderstorm Warning | LWX | Prince George's | 52 min |
| Aug 9, 6:49 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Prince George's | 22 min |
| Aug 9, 7:28 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery, Prince George's | 29 min |
| Aug 10, 4:34 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 41 min |
| Aug 10, 4:49 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 41 min |
| Aug 10, 5:08 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 18 min |
| Aug 10, 5:25 PM EDT | Severe Thunderstorm Warning | LWX | Prince George's | 50 min |
| Aug 10, 5:34 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Howard, Montgomery | 29 min |
| Aug 10, 5:53 PM EDT | Severe Thunderstorm Warning | LWX | Prince George's | 29 min |
| Aug 10, 5:55 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick | 27 min |
| Aug 10, 6:14 PM EDT | Severe Thunderstorm Warning | LWX | Carroll | 26 min |
| Aug 10, 6:29 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, City of Baltimore | 46 min |
| Aug 10, 6:38 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Prince George's | 52 min |
| Aug 10, 6:55 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Harford | 50 min |
| Aug 10, 7:01 PM EDT | Severe Thunderstorm Warning | LWX | Prince George's | 24 min |
| Aug 10, 7:04 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Cecil, Harford | 41 min |
| Aug 10, 7:28 PM EDT | Severe Thunderstorm Warning | LWX | Calvert, Charles, Prince George's, Saint Mary's | 62 min |
| Aug 10, 7:51 PM EDT | Severe Thunderstorm Warning | LWX | Cecil | 30 min |
| Aug 11, 2:51 PM EDT | Severe Thunderstorm Warning | LWX | Washington | 39 min |
| Aug 11, 2:59 PM EDT | Severe Thunderstorm Warning | LWX | Frederick | 46 min |
| Aug 11, 3:15 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 45 min |
| Aug 11, 3:42 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick, Montgomery | 48 min |
| Aug 11, 4:06 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll, Howard, Montgomery | 39 min |
| Aug 11, 4:20 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery, Prince George's | 40 min |
| Aug 11, 4:34 PM EDT | Severe Thunderstorm Warning | LWX | Washington | 41 min |
| Aug 11, 4:45 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery, Prince George's | 30 min |
| Aug 11, 5:01 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Howard, Montgomery, Prince George's | 44 min |
| Aug 11, 5:32 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, Harford, Howard, City of Baltimore | 43 min |
| Aug 11, 6:14 PM EDT | Severe Thunderstorm Warning | LWX | Cecil, Harford | 27 min |
| Aug 13, 1:43 PM EDT | Severe Thunderstorm Warning | LWX | Allegany, Washington | 47 min |
| Aug 13, 2:38 PM EDT | Severe Thunderstorm Warning | LWX | Washington | 35 min |
| Aug 13, 3:36 PM EDT | Severe Thunderstorm Warning | LWX | Frederick | 39 min |
| Aug 13, 3:50 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 40 min |
| Aug 13, 4:05 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 40 min |
| Aug 13, 4:30 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Howard, Montgomery | 45 min |
| Aug 13, 4:42 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, City of Baltimore | 48 min |
| Aug 13, 4:46 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 29 min |
| Aug 13, 4:49 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, Howard, Montgomery, Prince George's, City of Baltimore | 41 min |
| Aug 13, 4:49 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Harford | 41 min |
| Aug 13, 4:59 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Harford | 46 min |
| Aug 13, 5:11 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery, Prince George's | 49 min |
| Aug 13, 5:20 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Harford, City of Baltimore | 40 min |
| Aug 13, 5:22 PM EDT | Severe Thunderstorm Warning | LWX | Harford | 38 min |
| Aug 13, 5:25 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Calvert, Prince George's | 50 min |
| Aug 13, 5:35 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Prince George's | 25 min |
| Aug 13, 5:52 PM EDT | Severe Thunderstorm Warning | LWX | Cecil, Harford | 24 min |
| Aug 13, 5:56 PM EDT | Severe Thunderstorm Warning | LWX | Charles, Montgomery, Prince George's | 49 min |
| Aug 13, 6:01 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Prince George's | 44 min |
| Aug 13, 6:05 PM EDT | Severe Thunderstorm Warning | LWX | Charles | 40 min |
| Aug 13, 6:15 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Calvert, Prince George's | 45 min |
| Aug 13, 6:29 PM EDT | Severe Thunderstorm Warning | PHI | Queen Anne's, Talbot | 25 min |
| Aug 13, 6:33 PM EDT | Severe Thunderstorm Warning | LWX | Charles | 42 min |
| Aug 13, 6:45 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's | 30 min |
| Aug 13, 7:07 PM EDT | Severe Thunderstorm Warning | LWX | Calvert, Charles, Saint Mary's | 39 min |
| Aug 13, 7:11 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Calvert, Charles, Prince George's, Saint Mary's | 34 min |
| Aug 13, 7:12 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's | 33 min |
| Aug 13, 7:23 PM EDT | Severe Thunderstorm Warning | AKQ | Dorchester | 52 min |
| Aug 13, 7:41 PM EDT | Severe Thunderstorm Warning | LWX | Calvert, Saint Mary's | 21 min |
| Aug 13, 7:43 PM EDT | Severe Thunderstorm Warning | PHI | Caroline | 47 min |
| Aug 14, 10:28 PM EDT | Severe Thunderstorm Warning | LWX | Calvert, Charles, Prince George's | 47 min |
| Aug 18, 4:29 PM EDT | Severe Thunderstorm Warning | LWX | Saint Mary's | 14 min |
| Aug 18, 5:13 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick, Washington | 47 min |
| Aug 22, 1:14 PM EDT | Severe Thunderstorm Warning | LWX | Saint Mary's | 46 min |
| Aug 22, 1:51 PM EDT | Severe Thunderstorm Warning | LWX | Saint Mary's | 39 min |
| Aug 22, 4:41 PM EDT | Severe Thunderstorm Warning | LWX | Charles, Prince George's | 49 min |
| Aug 25, 4:21 PM EDT | Severe Thunderstorm Warning | LWX | Washington | 39 min |
| Aug 25, 9:20 PM EDT | Severe Thunderstorm Warning | LWX | Allegany, Washington | 40 min |
| Aug 26, 3:31 PM EDT | Severe Thunderstorm Warning | LWX | Prince George's | 44 min |
| Aug 26, 4:03 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 42 min |
| Aug 26, 5:49 PM EDT | Severe Thunderstorm Warning | LWX | Allegany | 41 min |
| Aug 27, 2:35 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 40 min |
| Aug 27, 3:05 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 40 min |
| Aug 27, 3:25 PM EDT | Severe Thunderstorm Warning | LWX | Frederick | 30 min |
| Aug 27, 3:36 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery, Prince George's | 19 min |
| Aug 27, 4:14 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick | 46 min |
| Aug 27, 4:59 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel | 33 min |
| Aug 27, 5:06 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll | 20 min |
| Aug 27, 5:21 PM EDT | Severe Thunderstorm Warning | LWX | Charles, Prince George's | 39 min |
| Aug 27, 5:52 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Harford | 53 min |
| Aug 27, 6:10 PM EDT | Severe Thunderstorm Warning | LWX | Charles | 32 min |
| Aug 27, 6:17 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Harford | 29 min |
| Aug 27, 6:28 PM EDT | Severe Thunderstorm Warning | LWX | Calvert, Charles, Prince George's, Saint Mary's | 47 min |
| Aug 27, 7:10 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Queen Anne's, Talbot | 65 min |
| Aug 27, 7:37 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Queen Anne's | 34 min |
| Aug 27, 9:35 PM EDT | Severe Thunderstorm Warning | LWX | Charles | 40 min |
| Aug 27, 10:08 PM EDT | Severe Thunderstorm Warning | LWX | Calvert, Charles, Prince George's, Saint Mary's | 52 min |
| Aug 28, 4:20 PM EDT | Severe Thunderstorm Warning | LWX | Washington | 40 min |
| Aug 28, 7:18 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 42 min |
| Aug 30, 4:54 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Queen Anne's | 51 min |
| Aug 30, 6:04 PM EDT | Severe Thunderstorm Warning | LWX | Charles, Saint Mary's | 25 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Prince George's County26
- Montgomery County22
- Baltimore County14
- Charles County14
- Harford County12
- Anne Arundel County12
- Washington County10
- Saint Mary's County10
- Frederick County9
- Calvert County9
- Carroll County8
- Queen Anne's County7
- Howard County6
- Caroline County5
- City of Baltimore5
- Cecil County4
- Allegany County3
- Kent County3
- Talbot County2
- Dorchester County1
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. Rebuilt daily.