Alert archive / Maryland / Severe Thunderstorm Warnings / 2020
Severe Thunderstorm Warnings in Maryland, June 2020
68 severe thunderstorm warnings in June 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 June 2020. Tap one for its archive.
- Severe Thunderstorm Warnings
- 68
- Busiest day
- June 22, 202022 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 3, 12:06 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 39 min |
| Jun 3, 12:38 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 69 min |
| Jun 3, 8:47 PM EDT | Severe Thunderstorm Warning | LWX | Harford | 28 min |
| Jun 3, 8:52 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 24 min |
| Jun 4, 4:41 PM EDT | Severe Thunderstorm Warning | LWX | Allegany | 49 min |
| Jun 4, 5:05 PM EDT | Severe Thunderstorm Warning | LWX | Allegany, Washington | 40 min |
| Jun 4, 5:20 PM EDT | Severe Thunderstorm Warning | LWX | Allegany, Washington | 40 min |
| Jun 4, 5:40 PM EDT | Severe Thunderstorm Warning | LWX | Washington | 35 min |
| Jun 4, 6:02 PM EDT | Severe Thunderstorm Warning | LWX | Allegany | 28 min |
| Jun 4, 7:07 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 26 min |
| Jun 4, 7:28 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery, Prince George's | 47 min |
| Jun 4, 7:52 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Carroll, Howard, Montgomery, Prince George's | 38 min |
| Jun 4, 7:56 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll, Harford | 34 min |
| Jun 4, 8:01 PM EDT | Severe Thunderstorm Warning | LWX | Charles, Prince George's | 44 min |
| Jun 4, 8:50 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Calvert, Prince George's | 40 min |
| Jun 4, 9:30 PM EDT | Severe Thunderstorm Warning | PHI | Cecil, Kent, Queen Anne's | 28 min |
| Jun 4, 10:10 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Montgomery | 25 min |
| Jun 4, 10:12 PM EDT | Severe Thunderstorm Warning | PHI | Cecil, Kent | 33 min |
| Jun 5, 2:20 PM EDT | Severe Thunderstorm Warning | LWX | Washington | 27 min |
| Jun 10, 3:12 PM EDT | Severe Thunderstorm Warning | LWX | Allegany, Washington | 21 min |
| Jun 10, 4:12 PM EDT | Severe Thunderstorm Warning | LWX | Allegany | 33 min |
| Jun 10, 7:02 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 43 min |
| Jun 10, 7:23 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Montgomery | 37 min |
| Jun 10, 7:45 PM EDT | Severe Thunderstorm Warning | LWX | Howard, Montgomery, Prince George's | 33 min |
| Jun 10, 9:49 PM EDT | Severe Thunderstorm Warning | LWX | Harford | 41 min |
| Jun 10, 10:06 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick, Howard, Montgomery | 24 min |
| Jun 10, 10:24 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll, Frederick | 26 min |
| Jun 22, 1:14 PM EDT | Severe Thunderstorm Warning | LWX | Allegany | 46 min |
| Jun 22, 2:39 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick, Montgomery | 35 min |
| Jun 22, 3:27 PM EDT | Severe Thunderstorm Warning | LWX | Allegany, Washington | 48 min |
| Jun 22, 3:30 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 45 min |
| Jun 22, 3:41 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick | 49 min |
| Jun 22, 3:44 PM EDT | Severe Thunderstorm Warning | LWX | Charles, Saint Mary's | 46 min |
| Jun 22, 3:44 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 46 min |
| Jun 22, 3:45 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Montgomery | 24 min |
| Jun 22, 3:53 PM EDT | Severe Thunderstorm Warning | LWX | Charles | 37 min |
| Jun 22, 4:07 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 11 min |
| Jun 22, 4:12 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick, Howard, Montgomery | 48 min |
| Jun 22, 4:14 PM EDT | Severe Thunderstorm Warning | LWX | Frederick | 46 min |
| Jun 22, 4:27 PM EDT | Severe Thunderstorm Warning | LWX | Charles, Saint Mary's | 48 min |
| Jun 22, 4:31 PM EDT | Severe Thunderstorm Warning | LWX | Saint Mary's | 44 min |
| Jun 22, 4:49 PM EDT | Severe Thunderstorm Warning | LWX | Calvert, Prince George's | 41 min |
| Jun 22, 4:54 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll, Frederick, Harford, Howard, Montgomery | 51 min |
| Jun 22, 5:00 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, Howard, Montgomery, Prince George's | 45 min |
| Jun 22, 5:30 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Howard, City of Baltimore | 45 min |
| Jun 22, 5:33 PM EDT | Severe Thunderstorm Warning | AKQ | Dorchester | 31 min |
| Jun 22, 5:58 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 47 min |
| Jun 22, 6:11 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Harford, City of Baltimore | 30 min |
| Jun 22, 7:25 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 22 min |
| Jun 23, 5:26 PM EDT | Severe Thunderstorm Warning | LWX | Washington | 49 min |
| Jun 23, 6:37 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, City of Baltimore | 23 min |
| Jun 23, 6:59 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Harford, City of Baltimore | 26 min |
| Jun 25, 4:12 PM EDT | Severe Thunderstorm Warning | LWX | Washington | 16 min |
| Jun 25, 5:26 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Montgomery | 29 min |
| Jun 25, 6:08 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Howard, Montgomery, Prince George's | 52 min |
| Jun 25, 6:20 PM EDT | Severe Thunderstorm Warning | LWX | Howard, Montgomery, Prince George's | 40 min |
| Jun 25, 6:53 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Howard, Montgomery, Prince George's | 52 min |
| Jun 25, 8:40 PM EDT | Severe Thunderstorm Warning | LWX | Charles | 50 min |
| Jun 27, 4:59 PM EDT | Severe Thunderstorm Warning | PHI | Cecil, Kent | 31 min |
| Jun 27, 5:00 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Montgomery, Prince George's | 45 min |
| Jun 27, 5:13 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel | 23 min |
| Jun 27, 5:30 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Prince George's | 45 min |
| Jun 27, 5:37 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Queen Anne's, Talbot | 23 min |
| Jun 27, 5:40 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's | 35 min |
| Jun 28, 4:21 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll, Howard | 17 min |
| Jun 28, 5:33 PM EDT | Severe Thunderstorm Warning | LWX | Harford | 42 min |
| Jun 28, 6:41 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Cecil, Kent, Queen Anne's | 34 min |
| Jun 28, 6:57 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's | 48 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Montgomery County21
- Frederick County13
- Prince George's County12
- Howard County11
- Washington County9
- Carroll County9
- Baltimore County9
- Cecil County8
- Allegany County8
- Harford County7
- Anne Arundel County7
- Kent County7
- Charles County5
- Queen Anne's County5
- City of Baltimore4
- Saint Mary's County3
- Caroline County3
- Calvert County2
- Dorchester County1
- Talbot 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.