Alert archive / Maryland / Mesoscale Discussions
Mesoscale Discussions in Maryland, 2020
78 mesoscale discussions in 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 mesoscale discussions reaches back to 2003.
Mesoscale Discussions by county
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Mesoscale Discussions
- 78
- Busiest month
- August20 mesoscale discussions
- Busiest day
- April 13, 20204 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 |
|---|---|---|---|---|
| Jan 7, 8:49 AM EST | Mesoscale Discussion | SPC | Allegany, Garrett | 4 hr |
| Jan 7, 12:29 PM EST | Mesoscale Discussion | SPC | Baltimore, Carroll, Frederick, Howard, Montgomery, Washington and 1 more | 2 hr |
| Feb 7, 6:56 AM EST | Mesoscale Discussion | SPC | Anne Arundel, Charles, Montgomery, Prince George's | 64 min |
| Feb 7, 9:50 AM EST | Mesoscale Discussion | SPC | Caroline, Cecil, Dorchester, Queen Anne's, Somerset, Talbot and 1 more | 85 min |
| Feb 26, 2:49 PM EST | Mesoscale Discussion | SPC | Allegany, Frederick, Garrett, Washington | 116 min |
| Feb 26, 8:44 PM EST | Mesoscale Discussion | SPC | Saint Mary's | 2 hr |
| Mar 3, 1:22 PM EST | Mesoscale Discussion | SPC | Allegany, Garrett | 113 min |
| Mar 3, 4:27 PM EST | Mesoscale Discussion | SPC | Allegany, Carroll, Frederick, Garrett, Washington | 2 hr |
| Mar 3, 6:50 PM EST | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Caroline, Carroll, Cecil, Harford and 6 more | 2 hr |
| Mar 3, 10:52 PM EST | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 12 more | 113 min |
| Mar 28, 5:51 PM EDT | Mesoscale Discussion | SPC | Allegany, Garrett | 84 min |
| Apr 7, 2:57 PM EDT | Mesoscale Discussion | SPC | Calvert, Charles, Dorchester, Saint Mary's, Somerset, Wicomico | 93 min |
| Apr 8, 1:52 AM EDT | Mesoscale Discussion | SPC | Allegany, Garrett | 83 min |
| Apr 8, 3:53 AM EDT | Mesoscale Discussion | SPC | Carroll, Frederick, Howard, Montgomery, Prince George's, City of Baltimore | 97 min |
| Apr 9, 11:09 AM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Cecil, Dorchester and 7 more | 66 min |
| Apr 13, 6:46 AM EDT | Mesoscale Discussion | SPC | Somerset | 89 min |
| Apr 13, 10:34 AM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Carroll, Cecil, Charles and 10 more | 86 min |
| Apr 13, 1:20 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 13 more | 85 min |
| Apr 13, 3:03 PM EDT | Mesoscale Discussion | SPC | Caroline, Cecil, Kent, Queen Anne's | 87 min |
| Apr 21, 12:23 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Cecil, Charles and 9 more | 2 hr |
| May 29, 12:27 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Carroll, Cecil, Charles, Frederick and 7 more | 63 min |
| May 29, 3:03 PM EDT | Mesoscale Discussion | SPC | Baltimore, Carroll, Howard, Montgomery | 87 min |
| May 29, 8:01 PM EDT | Mesoscale Discussion | SPC | Baltimore, Carroll, Cecil, Harford | 119 min |
| Jun 3, 11:34 AM EDT | Mesoscale Discussion | SPC | Baltimore, Carroll, Cecil, Harford, Kent, City of Baltimore | 86 min |
| Jun 3, 3:10 PM EDT | Mesoscale Discussion | SPC | Allegany, Anne Arundel, Baltimore, Carroll, Frederick, Garrett and 6 more | 2 hr |
| Jun 4, 2:02 PM EDT | Mesoscale Discussion | SPC | Baltimore, Carroll, Charles, Frederick, Howard, Montgomery and 2 more | 118 min |
| Jun 4, 4:41 PM EDT | Mesoscale Discussion | SPC | Allegany, Baltimore, Carroll, Frederick, Garrett, Howard and 3 more | 94 min |
| Jun 5, 1:15 PM EDT | Mesoscale Discussion | SPC | Charles, Prince George's | 2 hr |
| Jun 22, 1:58 PM EDT | Mesoscale Discussion | SPC | Allegany, Baltimore, Carroll, Charles, Frederick, Garrett and 5 more | 3 hr |
| Jun 25, 1:48 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Carroll, Charles, Frederick, Harford and 5 more | 117 min |
| Jun 25, 6:09 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 14 more | 96 min |
| Jun 27, 5:30 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Calvert, Caroline, Cecil, Charles, Dorchester and 8 more | 60 min |
| Jul 1, 1:46 PM EDT | Mesoscale Discussion | SPC | Calvert, Caroline, Charles, Dorchester, Saint Mary's, Somerset and 3 more | 119 min |
| Jul 5, 1:50 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 13 more | 115 min |
| Jul 6, 12:33 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 14 more | 3 hr |
| Jul 6, 4:33 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 15 more | 117 min |
| Jul 6, 6:25 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 14 more | 2 hr |
| Jul 6, 8:39 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 13 more | 2 hr |
| Jul 17, 1:47 PM EDT | Mesoscale Discussion | SPC | Charles, Saint Mary's | 118 min |
| Jul 21, 2:01 PM EDT | Mesoscale Discussion | SPC | Allegany, Anne Arundel, Baltimore, Carroll, Frederick, Harford and 5 more | 59 min |
| Jul 22, 10:48 AM EDT | Mesoscale Discussion | SPC | Allegany, Anne Arundel, Baltimore, Calvert, Caroline, Carroll and 18 more | 117 min |
| Jul 22, 3:18 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Calvert, Charles, Howard, Kent, Montgomery and 3 more | 87 min |
| Jul 22, 4:55 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Cecil, Charles and 11 more | 95 min |
| Jul 22, 7:01 PM EDT | Mesoscale Discussion | SPC | Caroline, Cecil, Dorchester, Harford, Kent, Queen Anne's and 4 more | 119 min |
| Jul 24, 4:22 PM EDT | Mesoscale Discussion | SPC | Charles | 83 min |
| Jul 28, 3:19 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Charles, Dorchester and 8 more | 116 min |
| Jul 31, 1:04 PM EDT | Mesoscale Discussion | SPC | Calvert, Charles, Dorchester, Saint Mary's, Somerset, Wicomico | 116 min |
| Aug 1, 4:00 PM EDT | Mesoscale Discussion | SPC | Allegany, Anne Arundel, Baltimore, Carroll, Charles, Frederick and 5 more | 2 hr |
| Aug 1, 7:05 PM EDT | Mesoscale Discussion | SPC | Allegany, Anne Arundel, Baltimore, Calvert, Caroline, Carroll and 15 more | 115 min |
| Aug 4, 1:41 AM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Charles, Dorchester and 11 more | 3 hr |
| Aug 4, 5:15 AM EDT | Mesoscale Discussion | SPC | Calvert, Caroline, Cecil, Dorchester, Kent, Queen Anne's and 5 more | 3 hr |
| Aug 6, 5:56 AM EDT | Mesoscale Discussion | SPC | Caroline, Dorchester, Kent, Queen Anne's, Talbot | 2 hr |
| Aug 6, 2:08 PM EDT | Mesoscale Discussion | SPC | Charles, Saint Mary's | 3 hr |
| Aug 7, 1:30 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Carroll, Cecil, Frederick, Harford and 7 more | 3 hr |
| Aug 12, 1:15 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 10 more | 2 hr |
| Aug 23, 3:57 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Carroll, Cecil, Charles, Frederick and 7 more | 2 hr |
| Aug 24, 12:44 PM EDT | Mesoscale Discussion | SPC | Allegany, Anne Arundel, Baltimore, Carroll, Cecil, Frederick and 6 more | 2 hr |
| Aug 25, 3:10 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 11 more | 95 min |
| Aug 25, 4:35 PM EDT | Mesoscale Discussion | SPC | Allegany, Garrett | 85 min |
| Aug 25, 7:07 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 15 more | 113 min |
| Aug 25, 8:50 PM EDT | Mesoscale Discussion | SPC | Calvert, Charles, Dorchester, Saint Mary's | 115 min |
| Aug 27, 2:14 PM EDT | Mesoscale Discussion | SPC | Allegany, Garrett, Washington | 2 hr |
| Aug 27, 6:35 PM EDT | Mesoscale Discussion | SPC | Allegany, Anne Arundel, Baltimore, Carroll, Cecil, Frederick and 7 more | 115 min |
| Aug 28, 9:55 AM EDT | Mesoscale Discussion | SPC | Baltimore, Carroll, Cecil, Frederick, Harford, Kent and 2 more | 3 hr |
| Aug 28, 3:50 PM EDT | Mesoscale Discussion | SPC | Baltimore, Cecil, Harford, Kent | 85 min |
| Aug 28, 7:50 PM EDT | Mesoscale Discussion | SPC | Calvert, Charles, Dorchester, Saint Mary's, Somerset, Talbot and 2 more | 2 hr |
| Aug 29, 12:08 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Cecil, Charles and 13 more | 3 hr |
| Sep 2, 3:37 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Carroll, Cecil, Charles and 9 more | 53 min |
| Sep 2, 8:20 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Caroline, Cecil, Harford, Howard and 6 more | 115 min |
| Sep 3, 3:06 PM EDT | Mesoscale Discussion | SPC | Allegany, Anne Arundel, Baltimore, Calvert, Caroline, Carroll and 17 more | 114 min |
| Sep 3, 6:18 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Caroline, Queen Anne's, Talbot | 117 min |
| Nov 15, 3:33 PM EST | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 13 more | 2 hr |
| Nov 15, 6:52 PM EST | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Caroline, Carroll, Cecil, Harford and 7 more | 113 min |
| Nov 30, 12:26 PM EST | Mesoscale Discussion | SPC | Anne Arundel, Calvert, Caroline, Cecil, Dorchester, Kent and 6 more | 3 hr |
| Nov 30, 3:02 PM EST | Mesoscale Discussion | SPC | Caroline, Dorchester, Queen Anne's, Saint Mary's, Somerset, Talbot and 2 more | 88 min |
| Nov 30, 4:37 PM EST | Mesoscale Discussion | SPC | Caroline, Dorchester, Somerset, Wicomico, Worcester | 53 min |
| Dec 16, 8:38 AM EST | Mesoscale Discussion | SPC | Allegany, Washington | 6 hr |
| Dec 16, 1:57 PM EST | Mesoscale Discussion | SPC | Allegany, Carroll, Frederick, Montgomery, Washington | 5 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Baltimore County44
- City of Baltimore42
- Howard County41
- Kent County41
- Anne Arundel County40
- Charles County40
- Prince George's County40
- Carroll County39
- Montgomery County39
- Cecil County39
- Harford County39
- Queen Anne's County37
- Caroline County35
- Talbot County35
- Frederick County32
- Dorchester County32
- Calvert County32
- Saint Mary's County30
- Washington County26
- Wicomico County25
- Somerset County21
- Allegany County20
- Worcester County18
- Garrett County13
The busiest days
Days with the most alerts issued, by UTC date.
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.