Alert archive / Maryland / Mesoscale Discussions
Mesoscale Discussions in Maryland, 2019
100 mesoscale discussions in 2019. 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 2019. Tap one for its archive.
- Mesoscale Discussions
- 100
- Busiest month
- May24 mesoscale discussions
- Busiest day
- August 7, 20195 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 13, 3:54 AM EST | Mesoscale Discussion | SPC | Calvert, Charles, Prince George's | 4 hr |
| Jan 19, 6:24 PM EST | Mesoscale Discussion | SPC | Allegany, Carroll, Frederick, Washington | 3 hr |
| Feb 12, 4:16 AM EST | Mesoscale Discussion | SPC | Allegany, Baltimore, Carroll, Frederick, Garrett, Harford and 3 more | 6 hr |
| Feb 20, 5:55 AM EST | Mesoscale Discussion | SPC | Allegany, Frederick, Garrett, Washington | 6 hr |
| Feb 20, 6:32 PM EST | Mesoscale Discussion | SPC | Allegany, Baltimore, Carroll, Cecil, Frederick, Harford and 4 more | 4 hr |
| Mar 3, 5:41 PM EST | Mesoscale Discussion | SPC | Baltimore, Carroll, Cecil, Frederick, Harford, Washington | 4 hr |
| Mar 15, 7:40 PM EDT | Mesoscale Discussion | SPC | Baltimore, Harford | 2 hr |
| Apr 14, 5:49 PM EDT | Mesoscale Discussion | SPC | Charles | 26 min |
| Apr 14, 7:42 PM EDT | Mesoscale Discussion | SPC | Baltimore, Carroll, Frederick, Harford, Howard, Montgomery and 1 more | 63 min |
| Apr 14, 11:56 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Caroline, Carroll, Cecil, Frederick and 7 more | 2 hr |
| Apr 15, 2:30 AM EDT | Mesoscale Discussion | SPC | Saint Mary's, Somerset | 60 min |
| Apr 15, 3:50 AM EDT | Mesoscale Discussion | SPC | Caroline, Cecil, Kent, Queen Anne's | 55 min |
| Apr 19, 12:08 PM EDT | Mesoscale Discussion | SPC | Howard, Montgomery, City of Baltimore | 2 hr |
| Apr 19, 3:18 PM EDT | Mesoscale Discussion | SPC | Somerset | 87 min |
| Apr 19, 4:32 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Charles, Frederick, Howard, Kent and 3 more | 58 min |
| Apr 19, 6:21 PM EDT | Mesoscale Discussion | SPC | Charles, Frederick, Montgomery, Prince George's | 84 min |
| Apr 19, 8:29 PM EDT | Mesoscale Discussion | SPC | Caroline, Wicomico | 91 min |
| Apr 26, 11:37 AM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 16 more | 113 min |
| Apr 26, 2:09 PM EDT | Mesoscale Discussion | SPC | Baltimore, Carroll, Cecil, Frederick, Harford, Howard and 2 more | 2 hr |
| Apr 26, 4:26 PM EDT | Mesoscale Discussion | SPC | Caroline, Cecil, Dorchester, Queen Anne's, Somerset, Wicomico and 1 more | 94 min |
| May 2, 3:28 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Charles, Harford, Howard and 6 more | 2 hr |
| May 3, 4:45 PM EDT | Mesoscale Discussion | SPC | Allegany, Frederick, Garrett, Washington | 60 min |
| May 3, 6:27 PM EDT | Mesoscale Discussion | SPC | Baltimore, Carroll, Frederick, Howard, Montgomery, Washington | 63 min |
| May 3, 8:29 PM EDT | Mesoscale Discussion | SPC | Baltimore, Carroll, Cecil, Frederick, Harford, Howard and 4 more | 61 min |
| May 19, 1:27 PM EDT | Mesoscale Discussion | SPC | Allegany, Carroll, Frederick, Garrett, Washington | 2 hr |
| May 19, 4:41 PM EDT | Mesoscale Discussion | SPC | Carroll, Frederick, Washington | 94 min |
| May 23, 11:52 AM EDT | Mesoscale Discussion | SPC | Allegany, Carroll, Frederick, Garrett, Howard, Montgomery and 1 more | 83 min |
| May 23, 3:42 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Cecil, Charles and 13 more | 93 min |
| May 23, 5:44 PM EDT | Mesoscale Discussion | SPC | Garrett | 61 min |
| May 23, 8:02 PM EDT | Mesoscale Discussion | SPC | Garrett | 118 min |
| May 25, 12:53 PM EDT | Mesoscale Discussion | SPC | Allegany, Garrett | 2 hr |
| May 25, 8:16 PM EDT | Mesoscale Discussion | SPC | Allegany, Garrett | 59 min |
| May 26, 11:14 AM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 15 more | 3 hr |
| May 26, 1:45 PM EDT | Mesoscale Discussion | SPC | Allegany, Anne Arundel, Baltimore, Calvert, Caroline, Carroll and 17 more | 2 hr |
| May 26, 5:45 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 13 more | 2 hr |
| May 26, 10:26 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Charles, Dorchester and 10 more | 94 min |
| May 28, 1:02 PM EDT | Mesoscale Discussion | SPC | Allegany, Anne Arundel, Baltimore, Caroline, Carroll, Cecil and 7 more | 118 min |
| May 28, 5:34 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Caroline, Carroll, Cecil, Dorchester and 8 more | 86 min |
| May 28, 8:07 PM EDT | Mesoscale Discussion | SPC | Baltimore, Caroline, Carroll, Cecil, Harford, Kent and 2 more | 113 min |
| May 29, 3:47 PM EDT | Mesoscale Discussion | SPC | Cecil, Harford | 118 min |
| May 29, 4:58 PM EDT | Mesoscale Discussion | SPC | Baltimore, Carroll, Frederick, Howard, Montgomery, City of Baltimore | 3 hr |
| May 30, 12:15 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 15 more | 2 hr |
| May 30, 3:56 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 14 more | 64 min |
| May 30, 6:35 PM EDT | Mesoscale Discussion | SPC | Charles, Saint Mary's | 55 min |
| Jun 2, 3:33 PM EDT | Mesoscale Discussion | SPC | Allegany, Anne Arundel, Baltimore, Calvert, Carroll, Charles and 9 more | 87 min |
| Jun 2, 5:57 PM EDT | Mesoscale Discussion | SPC | Calvert, Charles, Dorchester, Prince George's, Saint Mary's, Somerset and 3 more | 93 min |
| Jun 5, 12:52 PM EDT | Mesoscale Discussion | SPC | Calvert, Dorchester, Saint Mary's, Somerset, Wicomico, Worcester | 113 min |
| Jun 5, 5:33 PM EDT | Mesoscale Discussion | SPC | Saint Mary's, Somerset | 57 min |
| Jun 13, 3:51 PM EDT | Mesoscale Discussion | SPC | Allegany, Carroll, Frederick, Garrett, Howard, Montgomery and 1 more | 114 min |
| Jun 16, 1:53 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Caroline, Carroll, Cecil, Frederick and 9 more | 97 min |
| Jun 17, 2:03 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 16 more | 117 min |
| Jun 17, 8:14 PM EDT | Mesoscale Discussion | SPC | Dorchester, Somerset, Wicomico, Worcester | 61 min |
| Jun 18, 12:23 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 15 more | 97 min |
| Jun 18, 4:47 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Cecil, Charles and 13 more | 88 min |
| Jun 20, 12:23 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Calvert, Caroline, Charles, Dorchester, Montgomery and 5 more | 2 hr |
| Jun 20, 1:53 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Caroline, Carroll, Cecil, Frederick and 7 more | 2 hr |
| Jun 24, 7:17 PM EDT | Mesoscale Discussion | SPC | Allegany, Anne Arundel, Baltimore, Calvert, Carroll, Charles and 8 more | 2 hr |
| Jun 28, 5:59 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 12 more | 2 hr |
| Jun 29, 1:45 PM EDT | Mesoscale Discussion | SPC | Baltimore, Carroll, Cecil, Harford, Washington | 90 min |
| Jun 29, 4:01 PM EDT | Mesoscale Discussion | SPC | Cecil, Kent | 119 min |
| Jul 2, 3:10 PM EDT | Mesoscale Discussion | SPC | Allegany, Frederick, Garrett, Washington | 95 min |
| Jul 2, 5:53 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 12 more | 2 hr |
| Jul 4, 12:49 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Carroll, Cecil, Charles and 10 more | 116 min |
| Jul 6, 1:48 PM EDT | Mesoscale Discussion | SPC | Allegany, Anne Arundel, Baltimore, Calvert, Caroline, Carroll and 17 more | 2 hr |
| Jul 11, 10:45 AM EDT | Mesoscale Discussion | SPC | Garrett | 90 min |
| Jul 11, 12:51 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 12 more | 84 min |
| Jul 11, 5:59 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Cecil, Charles and 11 more | 2 hr |
| Jul 16, 3:28 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Carroll, Charles, Frederick, Harford and 5 more | 3 hr |
| Jul 17, 1:29 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 16 more | 3 hr |
| Jul 17, 6:38 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Cecil, Dorchester and 5 more | 97 min |
| Jul 18, 1:49 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 16 more | 2 hr |
| Jul 21, 6:07 PM EDT | Mesoscale Discussion | SPC | Allegany, Anne Arundel, Baltimore, Calvert, Caroline, Carroll and 14 more | 83 min |
| Jul 22, 1:11 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 13 more | 94 min |
| Jul 22, 4:20 PM EDT | Mesoscale Discussion | SPC | Baltimore, Cecil, Harford, Kent, City of Baltimore | 115 min |
| Jul 22, 7:20 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Charles, Prince George's | 55 min |
| Jul 22, 8:51 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 15 more | 84 min |
| Jul 31, 4:19 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Cecil, Charles and 12 more | 56 min |
| Aug 7, 12:50 PM EDT | Mesoscale Discussion | SPC | Saint Mary's | 85 min |
| Aug 7, 1:02 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 15 more | 88 min |
| Aug 7, 3:25 PM EDT | Mesoscale Discussion | SPC | Saint Mary's, Somerset | 65 min |
| Aug 7, 3:57 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Carroll, Cecil, Harford, Howard and 5 more | 93 min |
| Aug 7, 6:56 PM EDT | Mesoscale Discussion | SPC | Caroline, Queen Anne's, Talbot | 64 min |
| Aug 9, 2:25 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Calvert, Charles, Dorchester, Montgomery, Prince George's and 4 more | 95 min |
| Aug 15, 1:15 PM EDT | Mesoscale Discussion | SPC | Allegany, Carroll, Frederick, Garrett, Montgomery, Washington | 2 hr |
| Aug 16, 1:28 PM EDT | Mesoscale Discussion | SPC | Harford | 2 hr |
| Aug 20, 2:19 PM EDT | Mesoscale Discussion | SPC | Allegany, Baltimore, Carroll, Frederick, Howard, Montgomery and 3 more | 56 min |
| Aug 20, 7:00 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Carroll, Charles, Frederick and 5 more | 2 hr |
| Aug 21, 11:31 AM EDT | Mesoscale Discussion | SPC | Cecil | 119 min |
| Sep 2, 2:01 PM EDT | Mesoscale Discussion | SPC | Allegany, Baltimore, Carroll, Cecil, Frederick, Harford and 5 more | 119 min |
| Sep 11, 3:08 PM EDT | Mesoscale Discussion | SPC | Allegany, Anne Arundel, Baltimore, Calvert, Carroll, Charles and 7 more | 2 hr |
| Sep 12, 2:02 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 16 more | 118 min |
| Sep 14, 1:46 PM EDT | Mesoscale Discussion | SPC | Allegany, Garrett | 119 min |
| Sep 28, 5:51 PM EDT | Mesoscale Discussion | SPC | Allegany, Anne Arundel, Baltimore, Carroll, Cecil, Frederick and 8 more | 114 min |
| Oct 31, 11:12 AM EDT | Mesoscale Discussion | SPC | Garrett | 2 hr |
| Oct 31, 1:11 PM EDT | Mesoscale Discussion | SPC | Allegany, Frederick, Montgomery, Washington | 3 hr |
| Oct 31, 4:01 PM EDT | Mesoscale Discussion | SPC | Baltimore, Carroll, Frederick, Howard, Montgomery, Washington and 1 more | 119 min |
| Oct 31, 7:14 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Carroll, Cecil, Charles and 10 more | 2 hr |
| Oct 31, 9:58 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Calvert, Caroline, Cecil, Dorchester, Harford and 8 more | 2 hr |
| Nov 1, 12:50 AM EDT | Mesoscale Discussion | SPC | Worcester | 85 min |
| Dec 1, 5:45 AM EST | Mesoscale Discussion | SPC | Garrett | 6 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Baltimore County56
- Frederick County54
- Montgomery County54
- Carroll County52
- Howard County52
- City of Baltimore52
- Harford County50
- Cecil County47
- Anne Arundel County45
- Kent County44
- Prince George's County43
- Washington County42
- Charles County41
- Queen Anne's County41
- Calvert County38
- Caroline County37
- Talbot County36
- Saint Mary's County36
- Dorchester County32
- Somerset County27
- Wicomico County26
- Allegany County24
- Garrett County22
- Worcester County21
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20182020
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.