Alert archive / Maryland / Severe Thunderstorm Warnings / 2021
Severe Thunderstorm Warnings in Maryland, September 2021
29 severe thunderstorm warnings in September 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 September 2021. Tap one for its archive.
- Severe Thunderstorm Warnings
- 29
- Busiest day
- September 1, 202111 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 |
|---|---|---|---|---|
| Sep 1, 3:24 AM EDT | Severe Thunderstorm Warning | LWX | Montgomery, Prince George's | 51 min |
| Sep 1, 4:00 AM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Prince George's | 60 min |
| Sep 1, 4:50 AM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, City of Baltimore | 40 min |
| Sep 1, 2:40 PM EDT | Severe Thunderstorm Warning | AKQ | Dorchester, Somerset, Wicomico | 50 min |
| Sep 1, 3:16 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's, Talbot | 44 min |
| Sep 1, 3:56 PM EDT | Severe Thunderstorm Warning | AKQ | Dorchester, Somerset, Wicomico | 49 min |
| Sep 1, 5:04 PM EDT | Severe Thunderstorm Warning | AKQ | Dorchester, Wicomico | 41 min |
| Sep 1, 5:16 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's, Talbot | 44 min |
| Sep 1, 6:53 PM EDT | Severe Thunderstorm Warning | AKQ | Dorchester, Somerset, Wicomico | 52 min |
| Sep 1, 6:57 PM EDT | Severe Thunderstorm Warning | PHI | Caroline | 63 min |
| Sep 1, 7:29 PM EDT | Severe Thunderstorm Warning | AKQ | Somerset, Wicomico, Worcester | 46 min |
| Sep 8, 3:52 PM EDT | Severe Thunderstorm Warning | AKQ | Somerset, Worcester | 30 min |
| Sep 8, 9:11 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 64 min |
| Sep 8, 9:21 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick | 54 min |
| Sep 9, 12:17 AM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Cecil, Harford | 43 min |
| Sep 15, 3:45 PM EDT | Severe Thunderstorm Warning | LWX | Allegany | 16 min |
| Sep 15, 5:15 PM EDT | Severe Thunderstorm Warning | LWX | Washington | 30 min |
| Sep 15, 5:42 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 48 min |
| Sep 15, 5:52 PM EDT | Severe Thunderstorm Warning | LWX | Washington | 38 min |
| Sep 15, 6:23 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 52 min |
| Sep 15, 6:28 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 34 min |
| Sep 15, 9:38 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Cecil, Harford | 52 min |
| Sep 22, 4:22 PM EDT | Severe Thunderstorm Warning | LWX | Charles, Prince George's, Saint Mary's | 38 min |
| Sep 22, 5:39 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, Carroll, Howard, Montgomery, Prince George's | 51 min |
| Sep 22, 6:20 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll | 25 min |
| Sep 23, 7:56 AM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Harford | 22 min |
| Sep 23, 9:27 AM EDT | Severe Thunderstorm Warning | LWX | Cecil, Harford | 78 min |
| Sep 23, 9:46 AM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's, Talbot | 44 min |
| Sep 23, 10:35 AM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's | 40 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Baltimore County6
- Washington County6
- Somerset County5
- Wicomico County5
- Caroline County5
- Frederick County5
- Prince George's County4
- Dorchester County4
- Queen Anne's County4
- Harford County4
- Anne Arundel County3
- Kent County3
- Talbot County3
- Carroll County3
- Cecil County3
- Montgomery County2
- Worcester County2
- City of Baltimore1
- Allegany County1
- Charles County1
- Saint Mary's County1
- Howard 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.