Alert archive / Maryland / Severe Thunderstorm Warnings / 2020
Severe Thunderstorm Warnings in Maryland, April 2020
42 severe thunderstorm warnings in April 2020. 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 April 2020. Tap one for its archive.
- Severe Thunderstorm Warnings
- 42
- Busiest day
- April 13, 202016 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 |
|---|---|---|---|---|
| Apr 7, 3:29 PM EDT | Severe Thunderstorm Warning | LWX | Charles | 46 min |
| Apr 7, 4:04 PM EDT | Severe Thunderstorm Warning | LWX | Charles, Saint Mary's | 41 min |
| Apr 7, 4:30 PM EDT | Severe Thunderstorm Warning | AKQ | Dorchester | 45 min |
| Apr 8, 12:52 AM EDT | Severe Thunderstorm Warning | LWX | Harford | 24 min |
| Apr 8, 2:29 AM EDT | Severe Thunderstorm Warning | LWX | Allegany | 61 min |
| Apr 8, 2:32 AM EDT | Severe Thunderstorm Warning | PBZ | Garrett | 43 min |
| Apr 8, 2:50 AM EDT | Severe Thunderstorm Warning | LWX | Allegany, Washington | 55 min |
| Apr 8, 3:43 AM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick, Montgomery, Washington | 47 min |
| Apr 8, 3:53 AM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, Carroll, Frederick, Harford, Howard and 1 more | 37 min |
| Apr 8, 4:22 AM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Calvert, Charles, Montgomery, Prince George's, Saint Mary's | 38 min |
| Apr 9, 11:44 AM EDT | Severe Thunderstorm Warning | LWX | Frederick, Montgomery, Washington | 46 min |
| Apr 9, 11:51 AM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll, Frederick, Howard, Montgomery | 39 min |
| Apr 9, 12:13 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Prince George's | 47 min |
| Apr 9, 12:24 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Harford, City of Baltimore | 66 min |
| Apr 9, 12:29 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Queen Anne's | 31 min |
| Apr 9, 12:57 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's, Talbot | 33 min |
| Apr 9, 1:12 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 48 min |
| Apr 9, 1:16 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll, Harford, City of Baltimore | 18 min |
| Apr 9, 11:21 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Harford | 28 min |
| Apr 9, 11:24 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 36 min |
| Apr 9, 11:49 PM EDT | Severe Thunderstorm Warning | PHI | Cecil, Kent | 41 min |
| Apr 13, 3:57 AM EDT | Severe Thunderstorm Warning | PBZ | Garrett | 63 min |
| Apr 13, 7:37 AM EDT | Severe Thunderstorm Warning | LWX | Charles, Saint Mary's | 21 min |
| Apr 13, 11:54 AM EDT | Severe Thunderstorm Warning | LWX | Washington | 51 min |
| Apr 13, 12:42 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 48 min |
| Apr 13, 12:46 PM EDT | Severe Thunderstorm Warning | LWX | Prince George's | 44 min |
| Apr 13, 1:18 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Prince George's | 42 min |
| Apr 13, 1:20 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick, Howard, Montgomery, Washington | 40 min |
| Apr 13, 1:48 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 42 min |
| Apr 13, 2:00 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll, Harford | 45 min |
| Apr 13, 2:01 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll, Howard, Montgomery | 44 min |
| Apr 13, 2:18 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Howard, Montgomery, Prince George's | 27 min |
| Apr 13, 2:24 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, Howard, Montgomery, Prince George's, City of Baltimore | 51 min |
| Apr 13, 2:27 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Harford | 48 min |
| Apr 13, 2:35 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Montgomery, Prince George's | 40 min |
| Apr 13, 2:41 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 64 min |
| Apr 13, 2:50 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's, Talbot | 55 min |
| Apr 21, 1:49 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 56 min |
| Apr 21, 2:04 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Cecil, Kent, Queen Anne's, Talbot | 56 min |
| Apr 21, 2:35 PM EDT | Severe Thunderstorm Warning | AKQ | Dorchester, Wicomico | 40 min |
| Apr 21, 2:46 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Talbot | 74 min |
| Apr 21, 3:46 PM EDT | Severe Thunderstorm Warning | AKQ | Wicomico, Worcester | 44 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Montgomery County10
- Baltimore County9
- Harford County7
- Carroll County7
- Anne Arundel County7
- Prince George's County7
- Washington County6
- Frederick County6
- Howard County6
- Cecil County6
- Charles County4
- City of Baltimore4
- Kent County4
- Queen Anne's County4
- Caroline County4
- Talbot County4
- Saint Mary's County3
- Dorchester County2
- Allegany County2
- Garrett County2
- Wicomico County2
- Calvert County1
- Worcester County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20192021
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.