Alert archive / Maryland / Mesoscale Discussions
Mesoscale Discussions in Maryland, 2009
88 mesoscale discussions in 2009. 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 2009. Tap one for its archive.
- Mesoscale Discussions
- 88
- Busiest month
- June25 mesoscale discussions
- Busiest day
- June 9, 20094 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 28, 12:31 AM EST | Mesoscale Discussion | SPC | Allegany, Anne Arundel, Baltimore, Caroline, Carroll, Cecil and 11 more | 5 hr |
| Feb 11, 5:32 PM EST | Mesoscale Discussion | SPC | Allegany, Garrett, Washington | 88 min |
| Feb 11, 8:00 PM EST | Mesoscale Discussion | SPC | Allegany, Anne Arundel, Baltimore, Carroll, Charles, Frederick and 7 more | 60 min |
| Feb 11, 10:14 PM EST | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 13 more | 61 min |
| Feb 18, 1:05 AM EST | Mesoscale Discussion | SPC | Allegany, Garrett | 4 hr |
| Mar 1, 5:01 PM EST | Mesoscale Discussion | SPC | Anne Arundel, Calvert, Caroline, Cecil, Charles, Dorchester and 6 more | 2 hr |
| Mar 1, 9:09 PM EST | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Cecil, Dorchester and 6 more | 4 hr |
| Mar 2, 5:38 AM EST | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Cecil, Harford and 5 more | 3 hr |
| Mar 29, 1:49 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Carroll, Cecil, Frederick, Harford and 5 more | 116 min |
| Apr 20, 4:57 PM EDT | Mesoscale Discussion | SPC | Charles, Saint Mary's, Somerset | 93 min |
| Apr 20, 7:15 PM EDT | Mesoscale Discussion | SPC | Saint Mary's | 90 min |
| Apr 21, 2:12 PM EDT | Mesoscale Discussion | SPC | Washington | 2 hr |
| May 1, 1:03 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Calvert, Caroline, Cecil, Charles, Dorchester and 7 more | 117 min |
| May 6, 10:50 PM EDT | Mesoscale Discussion | SPC | Dorchester, Saint Mary's, Somerset | 55 min |
| May 7, 12:10 AM EDT | Mesoscale Discussion | SPC | Anne Arundel, Calvert, Caroline, Cecil, Charles, Dorchester and 6 more | 95 min |
| May 9, 5:58 PM EDT | Mesoscale Discussion | SPC | Caroline, Dorchester, Saint Mary's, Somerset, Talbot, Wicomico and 1 more | 62 min |
| May 16, 12:05 PM EDT | Mesoscale Discussion | SPC | Allegany, Garrett | 55 min |
| May 16, 2:36 PM EDT | Mesoscale Discussion | SPC | Baltimore, Carroll, Frederick, Howard, Montgomery, Prince George's and 1 more | 24 min |
| May 28, 4:54 PM EDT | Mesoscale Discussion | SPC | Garrett | 66 min |
| May 29, 12:20 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 13 more | 55 min |
| May 29, 4:30 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 14 more | 60 min |
| May 29, 6:20 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Cecil, Charles and 12 more | 55 min |
| Jun 2, 1:31 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 14 more | 89 min |
| Jun 2, 4:18 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Cecil, Charles and 11 more | 87 min |
| Jun 2, 6:47 PM EDT | Mesoscale Discussion | SPC | Calvert, Charles, Dorchester, Saint Mary's, Somerset | 58 min |
| Jun 3, 12:41 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Calvert, Charles, Howard, Montgomery, Prince George's and 2 more | 64 min |
| Jun 3, 4:34 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Calvert, Caroline, Charles, Dorchester, Howard and 10 more | 86 min |
| Jun 3, 7:10 PM EDT | Mesoscale Discussion | SPC | Allegany, Anne Arundel, Baltimore, Calvert, Caroline, Carroll and 17 more | 95 min |
| Jun 5, 1:49 PM EDT | Mesoscale Discussion | SPC | Worcester | 56 min |
| Jun 9, 6:01 AM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 14 more | 59 min |
| Jun 9, 1:38 PM EDT | Mesoscale Discussion | SPC | Allegany, Garrett | 97 min |
| Jun 9, 4:03 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Carroll, Charles, Frederick and 5 more | 57 min |
| Jun 9, 7:05 PM EDT | Mesoscale Discussion | SPC | Saint Mary's, Somerset, Wicomico, Worcester | 115 min |
| Jun 10, 1:57 PM EDT | Mesoscale Discussion | SPC | Allegany, Anne Arundel, Baltimore, Carroll, Charles, Frederick and 5 more | 93 min |
| Jun 11, 11:51 AM EDT | Mesoscale Discussion | SPC | Allegany, Carroll, Charles, Frederick, Howard, Montgomery and 2 more | 84 min |
| Jun 11, 8:24 PM EDT | Mesoscale Discussion | SPC | Calvert, Charles, Saint Mary's | 66 min |
| Jun 11, 10:01 PM EDT | Mesoscale Discussion | SPC | Baltimore, Caroline, Carroll, Cecil, Harford, Kent and 2 more | 59 min |
| Jun 13, 8:09 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Carroll, Charles, Frederick and 4 more | 66 min |
| Jun 17, 9:31 PM EDT | Mesoscale Discussion | SPC | Allegany, Garrett | 59 min |
| Jun 18, 11:40 AM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 11 more | 95 min |
| Jun 18, 3:31 PM EDT | Mesoscale Discussion | SPC | Calvert, Caroline, Charles, Dorchester, Queen Anne's, Saint Mary's and 3 more | 59 min |
| Jun 19, 5:56 PM EDT | Mesoscale Discussion | SPC | Garrett | 64 min |
| Jun 20, 3:14 AM EDT | Mesoscale Discussion | SPC | Allegany, Garrett | 91 min |
| Jun 20, 1:55 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Carroll, Charles, Dorchester and 10 more | 95 min |
| Jun 26, 2:19 PM EDT | Mesoscale Discussion | SPC | Baltimore, Carroll, Cecil, Frederick, Harford, Howard and 4 more | 56 min |
| Jun 26, 7:33 PM EDT | Mesoscale Discussion | SPC | Allegany, Anne Arundel, Baltimore, Caroline, Carroll, Cecil and 10 more | 57 min |
| Jun 26, 9:11 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 14 more | 64 min |
| Jul 1, 12:03 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 8 more | 87 min |
| Jul 1, 12:48 PM EDT | Mesoscale Discussion | SPC | Calvert, Charles, Dorchester, Saint Mary's, Somerset, Talbot | 57 min |
| Jul 12, 12:21 PM EDT | Mesoscale Discussion | SPC | Calvert, Caroline, Charles, Dorchester, Queen Anne's, Saint Mary's and 4 more | 54 min |
| Jul 16, 4:04 PM EDT | Mesoscale Discussion | SPC | Cecil | 86 min |
| Jul 17, 9:52 AM EDT | Mesoscale Discussion | SPC | Calvert, Charles, Prince George's, Saint Mary's | 83 min |
| Jul 17, 12:59 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Charles, Howard, Montgomery and 4 more | 91 min |
| Jul 17, 6:18 PM EDT | Mesoscale Discussion | SPC | Caroline | 57 min |
| Jul 21, 1:56 PM EDT | Mesoscale Discussion | SPC | Allegany, Frederick, Garrett, Washington | 64 min |
| Jul 24, 3:34 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 14 more | 86 min |
| Jul 25, 3:05 PM EDT | Mesoscale Discussion | SPC | Allegany, Frederick, Garrett, Washington | 55 min |
| Jul 26, 1:40 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 15 more | 2 hr |
| Jul 26, 4:16 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 15 more | 89 min |
| Jul 26, 8:21 PM EDT | Mesoscale Discussion | SPC | Caroline, Somerset, Wicomico, Worcester | 54 min |
| Jul 29, 1:32 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Calvert, Caroline, Charles, Dorchester, Kent and 8 more | 28 min |
| Jul 29, 5:05 PM EDT | Mesoscale Discussion | SPC | Baltimore, Caroline, Cecil, Harford, Kent, Queen Anne's | 55 min |
| Jul 31, 12:06 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Cecil, Charles and 12 more | 84 min |
| Jul 31, 3:05 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Cecil, Charles and 10 more | 85 min |
| Jul 31, 4:34 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Calvert, Caroline, Charles, Kent, Queen Anne's and 1 more | 86 min |
| Jul 31, 6:54 PM EDT | Mesoscale Discussion | SPC | Somerset, Worcester | 66 min |
| Aug 2, 11:33 AM EDT | Mesoscale Discussion | SPC | Calvert, Caroline, Dorchester, Queen Anne's, Saint Mary's, Somerset and 3 more | 2 hr |
| Aug 9, 2:45 PM EDT | Mesoscale Discussion | SPC | Carroll, Cecil, Harford | 60 min |
| Aug 9, 7:11 PM EDT | Mesoscale Discussion | SPC | Baltimore, Caroline, Cecil, Harford, Kent, Queen Anne's | 2 hr |
| Aug 12, 12:36 PM EDT | Mesoscale Discussion | SPC | Allegany, Garrett, Washington | 84 min |
| Aug 12, 1:01 PM EDT | Mesoscale Discussion | SPC | Caroline, Cecil, Harford, Kent, Queen Anne's, Wicomico and 1 more | 89 min |
| Aug 18, 2:32 PM EDT | Mesoscale Discussion | SPC | Allegany, Garrett | 88 min |
| Aug 19, 6:05 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Calvert, Caroline, Cecil, Dorchester, Harford and 7 more | 55 min |
| Aug 20, 10:40 PM EDT | Mesoscale Discussion | SPC | Allegany, Garrett | 95 min |
| Aug 21, 12:16 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Charles, Dorchester and 8 more | 119 min |
| Aug 21, 3:21 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Calvert, Caroline, Charles, Dorchester, Prince George's and 3 more | 84 min |
| Aug 21, 7:30 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Cecil, Charles and 11 more | 60 min |
| Aug 28, 12:24 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Calvert, Caroline, Dorchester, Kent, Queen Anne's and 3 more | 2 hr |
| Oct 24, 5:25 AM EDT | Mesoscale Discussion | SPC | Allegany, Garrett | 95 min |
| Oct 24, 12:19 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Cecil, Charles and 12 more | 116 min |
| Dec 3, 12:12 AM EST | Mesoscale Discussion | SPC | Calvert, Caroline, Dorchester, Saint Mary's, Somerset, Talbot and 2 more | 93 min |
| Dec 8, 1:14 PM EST | Mesoscale Discussion | SPC | Garrett | 5 hr |
| Dec 18, 7:22 PM EST | Mesoscale Discussion | SPC | Calvert, Charles, Prince George's, Saint Mary's | 5 hr |
| Dec 19, 12:34 AM EST | Mesoscale Discussion | SPC | Allegany, Anne Arundel, Baltimore, Calvert, Caroline, Carroll and 14 more | 5 hr |
| Dec 19, 6:57 AM EST | Mesoscale Discussion | SPC | Allegany, Anne Arundel, Baltimore, Calvert, Caroline, Carroll and 15 more | 6 hr |
| Dec 19, 12:27 PM EST | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 11 more | 6 hr |
| Dec 25, 7:50 AM EST | Mesoscale Discussion | SPC | Allegany | 4 hr |
| Dec 30, 10:57 PM EST | Mesoscale Discussion | SPC | Charles | 6 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Calvert County47
- Caroline County46
- Charles County45
- Saint Mary's County45
- Queen Anne's County44
- Talbot County44
- Anne Arundel County43
- Prince George's County42
- Kent County41
- City of Baltimore39
- Dorchester County39
- Baltimore County38
- Cecil County37
- Howard County37
- Harford County35
- Montgomery County32
- Carroll County28
- Wicomico County27
- Somerset County27
- Frederick County25
- Allegany County21
- Washington County20
- Garrett County18
- Worcester County17
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20082010
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.