Alert archive / Maryland / Severe Thunderstorm Warnings / 2026
Severe Thunderstorm Warnings in Maryland, August 2026
71 severe thunderstorm warnings in August 2026. 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 2026. Tap one for its archive.
- Severe Thunderstorm Warnings
- 71
- Busiest day
- August 10, 202633 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 6, 2:46 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 44 min |
| Aug 7, 3:07 PM EDT | Severe Thunderstorm Warning | LWX | Washington | 23 min |
| Aug 7, 3:29 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 46 min |
| Aug 7, 4:02 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Harford | 41 min |
| Aug 7, 4:56 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Prince George's | 15 min |
| Aug 7, 5:19 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, City of Baltimore | 29 min |
| Aug 7, 5:58 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 27 min |
| Aug 7, 6:18 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Queen Anne's | 42 min |
| Aug 7, 6:58 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's | 32 min |
| Aug 8, 1:18 PM EDT | Severe Thunderstorm Warning | LWX | Cecil, Harford | 57 min |
| Aug 8, 1:30 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Queen Anne's | 45 min |
| Aug 8, 1:44 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Queen Anne's | 46 min |
| Aug 8, 4:27 PM EDT | Severe Thunderstorm Warning | LWX | Charles | 63 min |
| Aug 10, 1:14 PM EDT | Severe Thunderstorm Warning | LWX | Garrett | 61 min |
| Aug 10, 1:48 PM EDT | Severe Thunderstorm Warning | LWX | Allegany | 57 min |
| Aug 10, 1:57 PM EDT | Severe Thunderstorm Warning | LWX | Allegany, Washington | 48 min |
| Aug 10, 2:25 PM EDT | Severe Thunderstorm Warning | LWX | Allegany, Washington | 35 min |
| Aug 10, 2:29 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 31 min |
| Aug 10, 2:43 PM EDT | Severe Thunderstorm Warning | LWX | Washington | 50 min |
| Aug 10, 2:46 PM EDT | Severe Thunderstorm Warning | LWX | Frederick | 44 min |
| Aug 10, 2:50 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 25 min |
| Aug 10, 2:56 PM EDT | Severe Thunderstorm Warning | LWX | Harford | 38 min |
| Aug 10, 3:10 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick, Washington | 65 min |
| Aug 10, 3:12 PM EDT | Severe Thunderstorm Warning | LWX | Harford | 48 min |
| Aug 10, 3:15 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Montgomery | 60 min |
| Aug 10, 3:21 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick | 39 min |
| Aug 10, 3:27 PM EDT | Severe Thunderstorm Warning | LWX | Washington | 18 min |
| Aug 10, 3:55 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll, Frederick, Harford, Howard, Montgomery and 1 more | 50 min |
| Aug 10, 3:57 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Howard, Montgomery, Prince George's | 48 min |
| Aug 10, 4:03 PM EDT | Severe Thunderstorm Warning | LWX | Charles, Prince George's | 57 min |
| Aug 10, 4:10 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll, Howard | 35 min |
| Aug 10, 4:33 PM EDT | Severe Thunderstorm Warning | LWX | Cecil, Harford | 42 min |
| Aug 10, 4:39 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Queen Anne's, Talbot | 66 min |
| Aug 10, 4:41 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, Calvert, Howard, Prince George's, City of Baltimore | 31 min |
| Aug 10, 5:05 PM EDT | Severe Thunderstorm Warning | LWX | Prince George's | 25 min |
| Aug 10, 5:21 PM EDT | Severe Thunderstorm Warning | LWX | Prince George's | 24 min |
| Aug 10, 5:29 PM EDT | Severe Thunderstorm Warning | LWX | Calvert, Charles, Prince George's, Saint Mary's | 46 min |
| Aug 10, 5:30 PM EDT | Severe Thunderstorm Warning | LWX | Charles, Saint Mary's | 45 min |
| Aug 10, 5:33 PM EDT | Severe Thunderstorm Warning | LWX | Cecil | 27 min |
| Aug 10, 5:36 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Calvert, Prince George's | 24 min |
| Aug 10, 5:36 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's, Talbot | 39 min |
| Aug 10, 5:45 PM EDT | Severe Thunderstorm Warning | AKQ | Dorchester | 45 min |
| Aug 10, 5:56 PM EDT | Severe Thunderstorm Warning | LWX | Calvert, Saint Mary's | 64 min |
| Aug 10, 6:07 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's, Talbot | 38 min |
| Aug 10, 6:26 PM EDT | Severe Thunderstorm Warning | AKQ | Dorchester, Wicomico | 64 min |
| Aug 10, 6:51 PM EDT | Severe Thunderstorm Warning | LWX | Saint Mary's | 24 min |
| Aug 11, 1:09 AM EDT | Severe Thunderstorm Warning | LWX | Allegany, Garrett | 36 min |
| Aug 14, 1:37 PM EDT | Severe Thunderstorm Warning | AKQ | Wicomico, Worcester | 38 min |
| Aug 16, 4:35 PM EDT | Severe Thunderstorm Warning | LWX | Garrett | 40 min |
| Aug 16, 4:56 PM EDT | Severe Thunderstorm Warning | LWX | Garrett | 34 min |
| Aug 16, 5:00 PM EDT | Severe Thunderstorm Warning | LWX | Allegany, Garrett | 32 min |
| Aug 16, 5:48 PM EDT | Severe Thunderstorm Warning | LWX | Allegany | 42 min |
| Aug 16, 9:07 PM EDT | Severe Thunderstorm Warning | LWX | Charles | 23 min |
| Aug 16, 9:17 PM EDT | Severe Thunderstorm Warning | LWX | Charles | 13 min |
| Aug 16, 9:29 PM EDT | Severe Thunderstorm Warning | LWX | Calvert, Charles, Saint Mary's | 46 min |
| Aug 17, 9:03 PM EDT | Severe Thunderstorm Warning | LWX | Calvert, Saint Mary's | 42 min |
| Aug 20, 2:46 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Montgomery | 29 min |
| Aug 20, 2:57 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 33 min |
| Aug 20, 5:05 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's, Talbot | 40 min |
| Aug 20, 5:40 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's | 50 min |
| Aug 20, 6:21 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's, Talbot | 39 min |
| Aug 20, 6:57 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Talbot | 48 min |
| Aug 20, 7:02 PM EDT | Severe Thunderstorm Warning | AKQ | Dorchester, Wicomico | 43 min |
| Aug 22, 8:57 PM EDT | Severe Thunderstorm Warning | LWX | Allegany, Washington | 33 min |
| Aug 22, 11:35 PM EDT | Severe Thunderstorm Warning | LWX | Calvert, Charles, Prince George's, Saint Mary's | 25 min |
| Aug 27, 4:11 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Harford | 34 min |
| Aug 27, 4:45 PM EDT | Severe Thunderstorm Warning | LWX | Washington | 45 min |
| Aug 27, 5:17 PM EDT | Severe Thunderstorm Warning | LWX | Washington | 28 min |
| Aug 27, 5:40 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 50 min |
| Aug 27, 6:20 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Montgomery, Washington | 40 min |
| Aug 27, 6:56 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick, Howard, Montgomery | 49 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Washington County14
- Frederick County12
- Queen Anne's County10
- Montgomery County9
- Prince George's County9
- Kent County9
- Charles County8
- Harford County7
- Caroline County7
- Allegany County7
- Calvert County7
- Saint Mary's County7
- Baltimore County6
- Talbot County6
- Garrett County5
- Carroll County5
- Howard County5
- Anne Arundel County4
- City of Baltimore3
- Cecil County3
- Dorchester County3
- Wicomico County3
- Worcester County1
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.