Alert archive / Maryland / Severe Thunderstorm Warnings / 2021
Severe Thunderstorm Warnings in Maryland, July 2021
109 severe thunderstorm warnings in July 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 July 2021. Tap one for its archive.
- Severe Thunderstorm Warnings
- 109
- Busiest day
- July 1, 202120 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 |
|---|---|---|---|---|
| Jul 1, 1:03 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 42 min |
| Jul 1, 1:44 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Montgomery, Prince George's | 46 min |
| Jul 1, 2:10 PM EDT | Severe Thunderstorm Warning | LWX | Howard, Montgomery | 50 min |
| Jul 1, 2:18 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Prince George's | 42 min |
| Jul 1, 2:28 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 47 min |
| Jul 1, 2:40 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 35 min |
| Jul 1, 2:41 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, Howard, City of Baltimore | 64 min |
| Jul 1, 2:43 PM EDT | Severe Thunderstorm Warning | LWX | Charles, Montgomery, Prince George's | 47 min |
| Jul 1, 3:06 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery, Prince George's | 24 min |
| Jul 1, 3:12 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Queen Anne's, Talbot | 48 min |
| Jul 1, 3:20 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Calvert, Prince George's | 55 min |
| Jul 1, 3:26 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Cecil, Harford | 38 min |
| Jul 1, 3:51 PM EDT | Severe Thunderstorm Warning | AKQ | Dorchester, Wicomico | 54 min |
| Jul 1, 3:56 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's, Talbot | 49 min |
| Jul 1, 4:08 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's, Talbot | 52 min |
| Jul 1, 4:08 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's | 52 min |
| Jul 1, 4:15 PM EDT | Severe Thunderstorm Warning | AKQ | Dorchester | 30 min |
| Jul 1, 4:32 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's, Talbot | 43 min |
| Jul 1, 5:21 PM EDT | Severe Thunderstorm Warning | AKQ | Somerset, Worcester | 39 min |
| Jul 1, 5:29 PM EDT | Severe Thunderstorm Warning | AKQ | Dorchester, Somerset, Wicomico, Worcester | 29 min |
| Jul 1, 8:47 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery, Prince George's | 43 min |
| Jul 1, 9:11 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Calvert, Prince George's | 49 min |
| Jul 1, 10:35 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Queen Anne's | 21 min |
| Jul 7, 4:09 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, City of Baltimore | 36 min |
| Jul 7, 4:47 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick, Howard | 43 min |
| Jul 8, 2:36 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, Howard, Prince George's, City of Baltimore | 39 min |
| Jul 9, 4:56 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Prince George's | 49 min |
| Jul 9, 5:26 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's, Talbot | 49 min |
| Jul 9, 5:30 PM EDT | Severe Thunderstorm Warning | LWX | Calvert, Charles, Prince George's | 45 min |
| Jul 9, 5:54 PM EDT | Severe Thunderstorm Warning | LWX | Calvert | 51 min |
| Jul 9, 6:03 PM EDT | Severe Thunderstorm Warning | LWX | Cecil, Harford | 57 min |
| Jul 9, 6:17 PM EDT | Severe Thunderstorm Warning | LWX | Charles, Prince George's | 31 min |
| Jul 9, 6:19 PM EDT | Severe Thunderstorm Warning | LWX | Calvert, Charles, Prince George's, Saint Mary's | 41 min |
| Jul 9, 6:43 PM EDT | Severe Thunderstorm Warning | LWX | Calvert | 32 min |
| Jul 9, 6:55 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick | 50 min |
| Jul 11, 7:58 PM EDT | Severe Thunderstorm Warning | LWX | Allegany, Washington | 47 min |
| Jul 11, 8:28 PM EDT | Severe Thunderstorm Warning | LWX | Allegany, Washington | 47 min |
| Jul 12, 2:43 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 47 min |
| Jul 12, 3:15 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 22 min |
| Jul 12, 6:28 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Harford | 47 min |
| Jul 12, 7:01 PM EDT | Severe Thunderstorm Warning | LWX | Cecil | 20 min |
| Jul 12, 7:08 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Cecil, Harford | 52 min |
| Jul 12, 7:23 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Cecil, Harford | 52 min |
| Jul 13, 4:33 PM EDT | Severe Thunderstorm Warning | LWX | Allegany, Garrett | 42 min |
| Jul 13, 5:14 PM EDT | Severe Thunderstorm Warning | LWX | Garrett | 46 min |
| Jul 13, 6:15 PM EDT | Severe Thunderstorm Warning | LWX | Garrett | 34 min |
| Jul 13, 6:55 PM EDT | Severe Thunderstorm Warning | LWX | Garrett | 19 min |
| Jul 14, 4:41 PM EDT | Severe Thunderstorm Warning | LWX | Charles | 49 min |
| Jul 14, 5:14 PM EDT | Severe Thunderstorm Warning | LWX | Charles | 34 min |
| Jul 14, 5:24 PM EDT | Severe Thunderstorm Warning | LWX | Calvert, Charles, Prince George's, Saint Mary's | 51 min |
| Jul 14, 5:46 PM EDT | Severe Thunderstorm Warning | LWX | Charles, Saint Mary's | 44 min |
| Jul 14, 6:03 PM EDT | Severe Thunderstorm Warning | LWX | Calvert, Saint Mary's | 57 min |
| Jul 14, 7:22 PM EDT | Severe Thunderstorm Warning | AKQ | Dorchester, Somerset, Wicomico | 28 min |
| Jul 17, 1:29 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll, Howard | 46 min |
| Jul 17, 2:40 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Cecil, Harford, City of Baltimore | 50 min |
| Jul 17, 2:59 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Harford, City of Baltimore | 31 min |
| Jul 17, 3:24 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll, Frederick, Howard | 24 min |
| Jul 17, 3:27 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Harford, City of Baltimore | 63 min |
| Jul 17, 3:30 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 45 min |
| Jul 17, 3:50 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll, Frederick, Howard, Montgomery | 40 min |
| Jul 17, 3:59 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, Howard, City of Baltimore | 46 min |
| Jul 17, 4:12 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 36 min |
| Jul 17, 4:28 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, City of Baltimore | 62 min |
| Jul 17, 5:20 PM EDT | Severe Thunderstorm Warning | LWX | Allegany, Washington | 40 min |
| Jul 17, 5:44 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick, Washington | 46 min |
| Jul 17, 6:35 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 40 min |
| Jul 17, 6:45 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 30 min |
| Jul 17, 7:11 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick, Howard, Montgomery | 49 min |
| Jul 17, 7:55 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll, Harford | 27 min |
| Jul 17, 7:59 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's | 46 min |
| Jul 21, 1:14 PM EDT | Severe Thunderstorm Warning | LWX | Prince George's | 46 min |
| Jul 21, 1:26 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll | 49 min |
| Jul 21, 1:27 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 21 min |
| Jul 21, 1:46 PM EDT | Severe Thunderstorm Warning | LWX | Charles, Prince George's | 44 min |
| Jul 21, 1:59 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 23 min |
| Jul 21, 2:31 PM EDT | Severe Thunderstorm Warning | AKQ | Dorchester | 44 min |
| Jul 21, 3:46 PM EDT | Severe Thunderstorm Warning | LWX | Saint Mary's | 44 min |
| Jul 21, 3:48 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's, Talbot | 26 min |
| Jul 21, 3:49 PM EDT | Severe Thunderstorm Warning | LWX | Cecil | 15 min |
| Jul 21, 4:16 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's | 44 min |
| Jul 21, 4:25 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's, Talbot | 30 min |
| Jul 21, 5:05 PM EDT | Severe Thunderstorm Warning | LWX | Charles, Saint Mary's | 40 min |
| Jul 26, 1:05 AM EDT | Severe Thunderstorm Warning | PHI | Kent, Queen Anne's | 40 min |
| Jul 26, 2:52 PM EDT | Severe Thunderstorm Warning | LWX | Allegany, Washington | 38 min |
| Jul 26, 3:21 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Calvert | 24 min |
| Jul 26, 6:46 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Howard, Montgomery, Prince George's | 44 min |
| Jul 26, 7:07 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery, Prince George's | 23 min |
| Jul 26, 7:30 PM EDT | Severe Thunderstorm Warning | LWX | Prince George's | 14 min |
| Jul 26, 7:36 PM EDT | Severe Thunderstorm Warning | LWX | Prince George's | 24 min |
| Jul 26, 8:01 PM EDT | Severe Thunderstorm Warning | LWX | Charles | 44 min |
| Jul 26, 8:24 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Prince George's | 24 min |
| Jul 26, 8:46 PM EDT | Severe Thunderstorm Warning | LWX | Charles, Prince George's, Saint Mary's | 44 min |
| Jul 26, 9:07 PM EDT | Severe Thunderstorm Warning | LWX | Charles | 38 min |
| Jul 28, 4:37 PM EDT | Severe Thunderstorm Warning | LWX | Saint Mary's | 38 min |
| Jul 28, 4:45 PM EDT | Severe Thunderstorm Warning | LWX | Calvert | 45 min |
| Jul 28, 5:05 PM EDT | Severe Thunderstorm Warning | LWX | Saint Mary's | 40 min |
| Jul 28, 9:30 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 45 min |
| Jul 28, 9:48 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery, Prince George's | 42 min |
| Jul 29, 11:48 AM EDT | Severe Thunderstorm Warning | PHI | Caroline, Talbot | 45 min |
| Jul 29, 12:12 PM EDT | Severe Thunderstorm Warning | AKQ | Dorchester | 29 min |
| Jul 29, 3:31 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick | 44 min |
| Jul 29, 4:00 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll | 45 min |
| Jul 29, 4:16 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll, Howard | 44 min |
| Jul 29, 4:40 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery, Prince George's | 50 min |
| Jul 29, 4:50 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, Howard, City of Baltimore | 55 min |
| Jul 29, 4:59 PM EDT | Severe Thunderstorm Warning | LWX | Charles | 46 min |
| Jul 29, 5:01 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery, Prince George's | 29 min |
| Jul 29, 5:30 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Calvert, Prince George's | 40 min |
| Jul 29, 5:43 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel | 17 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Prince George's County25
- Baltimore County20
- Montgomery County18
- Anne Arundel County16
- Charles County14
- Frederick County13
- Howard County12
- Queen Anne's County12
- Carroll County12
- Calvert County11
- Washington County11
- Caroline County10
- City of Baltimore9
- Harford County9
- Saint Mary's County9
- Talbot County8
- Cecil County7
- Dorchester County6
- Kent County5
- Allegany County5
- Garrett County4
- Wicomico County3
- Somerset County3
- Worcester County2
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.