Alert archive / Maryland / Mesoscale Discussions
Mesoscale Discussions in Maryland, 2021
92 mesoscale discussions in 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 mesoscale discussions reaches back to 2003.
Mesoscale Discussions by county
Each county as a circle sized by its count in 2021. Tap one for its archive.
- Mesoscale Discussions
- 92
- Busiest month
- July24 mesoscale discussions
- Busiest day
- September 1, 20215 mesoscale discussions
Over time
By month
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 |
|---|---|---|---|---|
| Feb 13, 10:02 AM EST | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Cecil, Charles and 11 more | 6 hr |
| Feb 15, 2:44 PM EST | Mesoscale Discussion | SPC | Allegany, Garrett | 6 hr |
| Feb 18, 4:28 AM EST | Mesoscale Discussion | SPC | Charles | 6 hr |
| Feb 18, 10:23 AM EST | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 11 more | 3 hr |
| Feb 19, 4:56 AM EST | Mesoscale Discussion | SPC | Calvert, Caroline, Dorchester, Saint Mary's, Talbot | 3 hr |
| Feb 22, 7:48 AM EST | Mesoscale Discussion | SPC | Washington | 4 hr |
| Mar 28, 1:24 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Charles, Dorchester and 11 more | 2 hr |
| Apr 11, 4:54 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Carroll, Charles, Frederick, Harford and 5 more | 2 hr |
| Apr 21, 12:22 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Calvert, Caroline, Cecil, Charles, Dorchester and 10 more | 113 min |
| Apr 29, 4:52 PM EDT | Mesoscale Discussion | SPC | Caroline, Cecil, Kent, Queen Anne's, Talbot | 2 hr |
| May 3, 2:47 PM EDT | Mesoscale Discussion | SPC | Garrett | 118 min |
| May 3, 7:16 PM EDT | Mesoscale Discussion | SPC | Baltimore, Carroll, Frederick, Harford, Howard, Kent and 1 more | 29 min |
| May 4, 1:04 PM EDT | Mesoscale Discussion | SPC | Charles | 56 min |
| May 4, 3:50 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Charles, Dorchester, Howard and 7 more | 115 min |
| May 5, 1:03 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 14 more | 2 hr |
| May 26, 1:21 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 16 more | 84 min |
| May 26, 4:41 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 10 more | 64 min |
| May 26, 6:34 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 9 more | 116 min |
| May 28, 3:56 PM EDT | Mesoscale Discussion | SPC | Charles, Saint Mary's | 2 hr |
| May 28, 7:18 PM EDT | Mesoscale Discussion | SPC | Calvert, Charles, Dorchester, Saint Mary's, Somerset, Wicomico | 87 min |
| Jun 3, 1:46 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 13 more | 119 min |
| Jun 3, 4:47 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 12 more | 88 min |
| Jun 4, 12:46 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Calvert, Charles, Prince George's, Queen Anne's, Saint Mary's and 2 more | 59 min |
| Jun 4, 2:26 PM EDT | Mesoscale Discussion | SPC | Cecil, Harford | 94 min |
| Jun 4, 4:12 PM EDT | Mesoscale Discussion | SPC | Calvert, Caroline, Cecil, Dorchester, Harford, Kent and 6 more | 93 min |
| Jun 13, 12:13 PM EDT | Mesoscale Discussion | SPC | Allegany, Garrett | 2 hr |
| Jun 13, 12:32 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Calvert, Carroll, Charles, Frederick, Howard and 3 more | 118 min |
| Jun 13, 3:26 PM EDT | Mesoscale Discussion | SPC | Garrett | 94 min |
| Jun 14, 11:31 AM EDT | Mesoscale Discussion | SPC | Allegany, Garrett | 89 min |
| Jun 14, 3:55 PM EDT | Mesoscale Discussion | SPC | Allegany, Garrett, Washington | 65 min |
| Jun 14, 6:41 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 13 more | 2 hr |
| Jun 14, 7:37 PM EDT | Mesoscale Discussion | SPC | Allegany, Garrett | 113 min |
| Jun 14, 10:09 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Calvert, Caroline, Charles, Dorchester, Kent and 7 more | 2 hr |
| Jun 21, 1:51 PM EDT | Mesoscale Discussion | SPC | Allegany, Anne Arundel, Baltimore, Carroll, Cecil, Frederick and 8 more | 114 min |
| Jun 21, 6:15 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Caroline, Cecil, Harford, Howard and 5 more | 60 min |
| Jun 30, 4:41 PM EDT | Mesoscale Discussion | SPC | Allegany, Baltimore, Carroll, Frederick, Garrett, Howard and 2 more | 2 hr |
| Jun 30, 6:58 PM EDT | Mesoscale Discussion | SPC | Carroll, Frederick, Montgomery | 92 min |
| Jul 1, 11:45 AM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 15 more | 2 hr |
| Jul 1, 2:36 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Cecil, Charles and 10 more | 84 min |
| Jul 1, 4:16 PM EDT | Mesoscale Discussion | SPC | Caroline, Dorchester, Kent, Queen Anne's, Somerset, Talbot and 2 more | 89 min |
| Jul 6, 4:23 PM EDT | Mesoscale Discussion | SPC | Cecil, Harford | 97 min |
| Jul 8, 6:48 PM EDT | Mesoscale Discussion | SPC | Somerset, Wicomico, Worcester | 117 min |
| Jul 8, 10:01 PM EDT | Mesoscale Discussion | SPC | Somerset, Wicomico, Worcester | 59 min |
| Jul 9, 2:15 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Cecil, Charles and 11 more | 2 hr |
| Jul 9, 4:35 PM EDT | Mesoscale Discussion | SPC | Cecil | 115 min |
| Jul 11, 2:05 PM EDT | Mesoscale Discussion | SPC | Allegany, Garrett | 55 min |
| Jul 11, 8:58 PM EDT | Mesoscale Discussion | SPC | Carroll, Washington | 62 min |
| Jul 12, 1:32 PM EDT | Mesoscale Discussion | SPC | Allegany, Anne Arundel, Baltimore, Calvert, Caroline, Carroll and 12 more | 88 min |
| Jul 12, 7:25 PM EDT | Mesoscale Discussion | SPC | Cecil, Harford, Kent | 2 hr |
| Jul 13, 4:07 PM EDT | Mesoscale Discussion | SPC | Allegany, Garrett | 113 min |
| Jul 14, 3:24 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Calvert, Charles, Howard, Montgomery, Prince George's | 2 hr |
| Jul 17, 12:00 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 11 more | 3 hr |
| Jul 17, 3:02 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Caroline, Cecil, Charles, Harford and 7 more | 88 min |
| Jul 17, 4:38 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Carroll, Cecil, Charles and 9 more | 97 min |
| Jul 17, 6:54 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 11 more | 2 hr |
| Jul 17, 10:02 PM EDT | Mesoscale Discussion | SPC | Caroline, Cecil, Kent, Queen Anne's | 58 min |
| Jul 21, 10:32 AM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 9 more | 58 min |
| Jul 21, 2:39 PM EDT | Mesoscale Discussion | SPC | Calvert, Caroline, Cecil, Dorchester, Kent, Queen Anne's and 4 more | 2 hr |
| Jul 29, 11:58 AM EDT | Mesoscale Discussion | SPC | Allegany, Garrett | 2 hr |
| Jul 29, 1:21 PM EDT | Mesoscale Discussion | SPC | Carroll, Frederick, Washington | 114 min |
| Jul 29, 4:26 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Carroll, Cecil, Frederick, Harford and 5 more | 94 min |
| Aug 10, 2:30 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 11 more | 3 hr |
| Aug 11, 1:01 PM EDT | Mesoscale Discussion | SPC | Carroll, Charles, Frederick, Howard, Montgomery, Prince George's and 1 more | 89 min |
| Aug 11, 3:47 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Carroll, Cecil, Charles and 9 more | 88 min |
| Aug 11, 6:44 PM EDT | Mesoscale Discussion | SPC | Cecil | 91 min |
| Aug 13, 12:33 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Carroll, Charles, Frederick, Harford and 5 more | 87 min |
| Aug 13, 4:48 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Cecil, Charles, Harford, Howard and 2 more | 87 min |
| Aug 13, 6:02 PM EDT | Mesoscale Discussion | SPC | Wicomico, Worcester | 58 min |
| Aug 14, 1:10 PM EDT | Mesoscale Discussion | SPC | Calvert, Charles, Dorchester, Prince George's, Saint Mary's, Somerset and 1 more | 2 hr |
| Aug 18, 8:46 AM EDT | Mesoscale Discussion | SPC | Frederick, Washington | 119 min |
| Aug 18, 10:58 AM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Carroll, Charles, Frederick and 9 more | 92 min |
| Aug 18, 3:29 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Carroll, Cecil, Frederick, Harford and 5 more | 91 min |
| Aug 18, 4:57 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Carroll, Cecil, Frederick, Harford and 6 more | 93 min |
| Aug 27, 1:41 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Carroll, Cecil, Charles and 9 more | 3 hr |
| Aug 28, 1:05 PM EDT | Mesoscale Discussion | SPC | Allegany, Frederick, Washington | 115 min |
| Aug 30, 4:51 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Calvert, Caroline, Cecil, Charles, Howard and 6 more | 84 min |
| Sep 1, 12:19 AM EDT | Mesoscale Discussion | SPC | Anne Arundel, Calvert, Charles, Montgomery, Prince George's | 86 min |
| Sep 1, 4:01 AM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Carroll, Cecil, Harford, Howard and 4 more | 119 min |
| Sep 1, 11:03 AM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 14 more | 2 hr |
| Sep 1, 1:32 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Carroll, Cecil, Charles and 9 more | 118 min |
| Sep 1, 3:09 PM EDT | Mesoscale Discussion | SPC | Caroline, Cecil, Dorchester, Harford, Kent, Queen Anne's and 2 more | 3 hr |
| Sep 8, 10:42 PM EDT | Mesoscale Discussion | SPC | Baltimore, Carroll, Cecil, Harford, Howard, Montgomery and 1 more | 2 hr |
| Sep 22, 6:14 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Cecil, Dorchester and 9 more | 2 hr |
| Sep 23, 3:13 AM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 14 more | 5 hr |
| Sep 23, 10:30 AM EDT | Mesoscale Discussion | SPC | Caroline, Cecil, Wicomico | 2 hr |
| Oct 4, 4:44 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Caroline, Carroll, Cecil, Charles and 9 more | 2 hr |
| Oct 16, 1:50 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Cecil, Harford, Howard, Kent and 3 more | 115 min |
| Oct 25, 6:41 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Carroll, Cecil, Frederick, Harford and 5 more | 2 hr |
| Oct 25, 8:13 PM EDT | Mesoscale Discussion | SPC | Saint Mary's | 92 min |
| Oct 29, 3:36 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Calvert, Caroline, Dorchester, Queen Anne's, Saint Mary's and 4 more | 2 hr |
| Dec 11, 7:29 PM EST | Mesoscale Discussion | SPC | Baltimore, Cecil, Harford, Kent, Queen Anne's, City of Baltimore | 3 hr |
| Dec 27, 6:58 AM EST | Mesoscale Discussion | SPC | Garrett | 5 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Cecil County50
- Kent County49
- Anne Arundel County48
- Harford County47
- Howard County46
- City of Baltimore46
- Prince George's County45
- Queen Anne's County45
- Baltimore County44
- Charles County43
- Montgomery County43
- Calvert County40
- Talbot County39
- Carroll County38
- Caroline County36
- Frederick County30
- Saint Mary's County29
- Dorchester County26
- Wicomico County22
- Washington County22
- Somerset County19
- Worcester County14
- Garrett County13
- Allegany County12
The busiest days
Days with the most alerts issued, by UTC date.
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. Rebuilt daily.