Alert archive / Maryland / Severe Thunderstorm Warnings / 2021
Severe Thunderstorm Warnings in Maryland, June 2021
67 severe thunderstorm warnings in June 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 June 2021. Tap one for its archive.
- Severe Thunderstorm Warnings
- 67
- Busiest day
- June 21, 202118 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 |
|---|---|---|---|---|
| Jun 2, 6:00 PM EDT | Severe Thunderstorm Warning | LWX | Allegany | 45 min |
| Jun 2, 6:27 PM EDT | Severe Thunderstorm Warning | LWX | Allegany | 48 min |
| Jun 3, 3:14 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Montgomery | 46 min |
| Jun 3, 3:47 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick, Howard, Montgomery | 43 min |
| Jun 3, 3:50 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 40 min |
| Jun 3, 4:12 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore | 33 min |
| Jun 3, 4:20 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll, Howard, City of Baltimore | 40 min |
| Jun 3, 4:43 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Cecil, Harford, City of Baltimore | 47 min |
| Jun 3, 4:54 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Montgomery | 36 min |
| Jun 3, 5:26 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Cecil, Harford | 49 min |
| Jun 3, 5:27 PM EDT | Severe Thunderstorm Warning | LWX | Howard, Montgomery | 33 min |
| Jun 3, 6:03 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Howard, Montgomery, Prince George's | 28 min |
| Jun 3, 6:14 PM EDT | Severe Thunderstorm Warning | LWX | Cecil, Harford | 34 min |
| Jun 3, 6:36 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Harford | 39 min |
| Jun 4, 12:36 PM EDT | Severe Thunderstorm Warning | LWX | Prince George's | 39 min |
| Jun 4, 12:50 PM EDT | Severe Thunderstorm Warning | LWX | Charles, Prince George's | 55 min |
| Jun 4, 1:36 PM EDT | Severe Thunderstorm Warning | LWX | Calvert, Charles, Prince George's, Saint Mary's | 39 min |
| Jun 4, 2:17 PM EDT | Severe Thunderstorm Warning | LWX | Calvert, Charles, Saint Mary's | 43 min |
| Jun 4, 2:50 PM EDT | Severe Thunderstorm Warning | LWX | Calvert, Charles, Saint Mary's | 40 min |
| Jun 4, 2:55 PM EDT | Severe Thunderstorm Warning | AKQ | Dorchester | 30 min |
| Jun 4, 3:19 PM EDT | Severe Thunderstorm Warning | LWX | Saint Mary's | 41 min |
| Jun 4, 3:54 PM EDT | Severe Thunderstorm Warning | LWX | Saint Mary's | 51 min |
| Jun 4, 4:44 PM EDT | Severe Thunderstorm Warning | LWX | Cecil | 22 min |
| Jun 8, 3:48 PM EDT | Severe Thunderstorm Warning | LWX | Cecil | 42 min |
| Jun 9, 4:09 PM EDT | Severe Thunderstorm Warning | AKQ | Wicomico, Worcester | 51 min |
| Jun 9, 4:37 PM EDT | Severe Thunderstorm Warning | PHI | Caroline | 27 min |
| Jun 9, 5:14 PM EDT | Severe Thunderstorm Warning | LWX | Saint Mary's | 46 min |
| Jun 9, 6:09 PM EDT | Severe Thunderstorm Warning | LWX | Saint Mary's | 30 min |
| Jun 10, 2:57 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, City of Baltimore | 25 min |
| Jun 10, 2:59 PM EDT | Severe Thunderstorm Warning | LWX | Frederick | 46 min |
| Jun 13, 12:51 PM EDT | Severe Thunderstorm Warning | LWX | Garrett | 26 min |
| Jun 14, 5:53 PM EDT | Severe Thunderstorm Warning | LWX | Garrett | 38 min |
| Jun 14, 9:02 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, Carroll, Howard, City of Baltimore | 43 min |
| Jun 14, 9:22 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Howard, Montgomery | 38 min |
| Jun 14, 9:29 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, Harford, City of Baltimore | 46 min |
| Jun 14, 9:55 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 50 min |
| Jun 14, 9:56 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, Howard, City of Baltimore | 28 min |
| Jun 14, 10:12 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, Harford | 33 min |
| Jun 14, 10:16 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, City of Baltimore | 44 min |
| Jun 14, 10:23 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Queen Anne's | 67 min |
| Jun 14, 10:30 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Howard, Montgomery, Prince George's | 45 min |
| Jun 14, 11:03 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's, Talbot | 57 min |
| Jun 14, 11:12 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's | 63 min |
| Jun 14, 11:23 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel | 24 min |
| Jun 14, 11:42 PM EDT | Severe Thunderstorm Warning | PHI | Kent | 63 min |
| Jun 14, 11:51 PM EDT | Severe Thunderstorm Warning | PHI | Caroline | 54 min |
| Jun 14, 11:54 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's, Talbot | 66 min |
| Jun 20, 8:11 PM EDT | Severe Thunderstorm Warning | LWX | Allegany | 26 min |
| Jun 21, 2:15 PM EDT | Severe Thunderstorm Warning | LWX | Garrett | 45 min |
| Jun 21, 3:33 PM EDT | Severe Thunderstorm Warning | LWX | Allegany, Washington | 42 min |
| Jun 21, 3:59 PM EDT | Severe Thunderstorm Warning | LWX | Washington | 46 min |
| Jun 21, 4:09 PM EDT | Severe Thunderstorm Warning | LWX | Washington | 51 min |
| Jun 21, 4:25 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick, Washington | 50 min |
| Jun 21, 4:26 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 49 min |
| Jun 21, 4:47 PM EDT | Severe Thunderstorm Warning | LWX | Frederick | 28 min |
| Jun 21, 5:02 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick, Howard, Montgomery | 43 min |
| Jun 21, 5:10 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick | 50 min |
| Jun 21, 5:44 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, Carroll, Howard, Montgomery, Prince George's and 1 more | 46 min |
| Jun 21, 6:14 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Cecil, Harford | 46 min |
| Jun 21, 6:28 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, Harford, Howard, City of Baltimore | 47 min |
| Jun 21, 6:30 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Prince George's | 45 min |
| Jun 21, 6:46 PM EDT | Severe Thunderstorm Warning | LWX | Allegany, Garrett | 29 min |
| Jun 21, 6:47 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's, Talbot | 58 min |
| Jun 21, 6:51 PM EDT | Severe Thunderstorm Warning | LWX | Cecil, Harford | 39 min |
| Jun 21, 7:43 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's | 47 min |
| Jun 30, 4:39 PM EDT | Severe Thunderstorm Warning | LWX | Allegany | 36 min |
| Jun 30, 4:55 PM EDT | Severe Thunderstorm Warning | LWX | Allegany, Washington | 21 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Baltimore County14
- Montgomery County11
- Howard County11
- Anne Arundel County11
- Frederick County10
- City of Baltimore9
- Harford County9
- Allegany County7
- Carroll County7
- Cecil County7
- Prince George's County7
- Saint Mary's County7
- Caroline County7
- Washington County6
- Kent County6
- Queen Anne's County6
- Charles County4
- Garrett County4
- Calvert County3
- Talbot County3
- Dorchester County1
- Wicomico County1
- Worcester 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. Warning verification from the Mesonet's Cow. Rebuilt daily.