Alert archive / Maryland / Severe Thunderstorm Warnings
Severe Thunderstorm Warnings in Maryland, 2014
194 severe thunderstorm warnings in 2014. 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 2014. Tap one for its archive.
- Severe Thunderstorm Warnings
- 194
- Busiest month
- July78 severe thunderstorm warnings
- Busiest day
- May 22, 201416 severe thunderstorm warnings
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
140 of 194 severe thunderstorm warnings covering Maryland in 2014 had a qualifying storm report inside them; 313 of 372 hail, wind and damage reports fell inside a warning, on average 24 minutes after it went out.
Maryland, 2014
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Severe thunderstorm warnings | 194 | 140 | 28% | 372 | 84% | 24 min |
Each office's whole area, 2014
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Wakefield, VA: severe thunderstorm warnings | 130 | 86 | 34% | 302 | 75% | 20 min |
| NWS Pittsburgh, PA: severe thunderstorm warnings | 147 | 106 | 28% | 399 | 80% | 22 min |
| NWS Baltimore/Washington: severe thunderstorm warnings | 259 | 194 | 25% | 672 | 86% | 21 min |
| NWS Philadelphia/Mount Holly: severe thunderstorm warnings | 167 | 91 | 46% | 267 | 80% | 24 min |
An office's figures cover every county it serves, including across state lines.
Verified by the Iowa Environmental Mesonet's Cow, which matches each storm-based warning with the local storm reports inside its polygon while it was in force, within 15 km of its edge: a tornado warning counts as verified on a tornado report, a severe thunderstorm warning on hail of 1 inch or more, a gust of 58 mph or more, or wind damage, a flash flood warning on a flash flood report. The false alarm ratio is the share of warnings with no such report; "inside a warning" is the probability of detection, the share of reports that fell inside one; lead time runs from the warning's issue to each report inside it, counting zero for a report that came first. A warning with no report is not proof nothing happened: reports come from spotters, the public and damage surveys, and are thin where few people live.
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 11, 2:50 PM EST | Severe Thunderstorm Warning | LWX | Calvert, Saint Mary's | 40 min |
| Jan 11, 4:15 PM EST | Severe Thunderstorm Warning | AKQ | Somerset, Wicomico, Worcester | 45 min |
| Feb 21, 12:04 PM EST | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, Harford, Howard, City of Baltimore | 56 min |
| Feb 21, 12:11 PM EST | Severe Thunderstorm Warning | LWX | Calvert, Saint Mary's | 64 min |
| Feb 21, 12:32 PM EST | Severe Thunderstorm Warning | PHI | Cecil | 58 min |
| Feb 21, 12:44 PM EST | Severe Thunderstorm Warning | AKQ | Dorchester, Wicomico | 31 min |
| Feb 21, 12:55 PM EST | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's, Talbot | 65 min |
| Feb 21, 1:16 PM EST | Severe Thunderstorm Warning | AKQ | Dorchester, Somerset, Wicomico | 29 min |
| Feb 21, 1:30 PM EST | Severe Thunderstorm Warning | AKQ | Somerset, Worcester | 45 min |
| Mar 12, 7:15 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Cecil, Kent, Queen Anne's, Talbot | 45 min |
| Apr 22, 6:52 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 38 min |
| Apr 22, 7:21 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 39 min |
| Apr 30, 4:19 PM EDT | Severe Thunderstorm Warning | LWX | Calvert, Charles, Saint Mary's | 41 min |
| May 7, 8:30 AM EDT | Severe Thunderstorm Warning | PBZ | Garrett | 60 min |
| May 10, 1:25 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick, Montgomery | 50 min |
| May 10, 1:28 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Harford | 47 min |
| May 12, 5:56 PM EDT | Severe Thunderstorm Warning | LWX | Charles, Prince George's | 34 min |
| May 13, 4:29 PM EDT | Severe Thunderstorm Warning | LWX | Allegany | 46 min |
| May 13, 5:14 PM EDT | Severe Thunderstorm Warning | LWX | Allegany, Washington | 61 min |
| May 13, 7:07 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Montgomery | 68 min |
| May 13, 9:09 PM EDT | Severe Thunderstorm Warning | LWX | Charles | 51 min |
| May 14, 3:08 PM EDT | Severe Thunderstorm Warning | LWX | Allegany | 52 min |
| May 15, 5:00 PM EDT | Severe Thunderstorm Warning | LWX | Howard, Montgomery | 45 min |
| May 21, 6:42 PM EDT | Severe Thunderstorm Warning | LWX | Charles, Saint Mary's | 48 min |
| May 22, 3:47 AM EDT | Severe Thunderstorm Warning | LWX | Allegany, Washington | 43 min |
| May 22, 4:03 AM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 42 min |
| May 22, 5:47 AM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Howard, Prince George's | 43 min |
| May 22, 2:57 PM EDT | Severe Thunderstorm Warning | LWX | Washington | 48 min |
| May 22, 3:24 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick, Howard, Montgomery | 51 min |
| May 22, 3:33 PM EDT | Severe Thunderstorm Warning | LWX | Harford | 42 min |
| May 22, 3:48 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Howard, Montgomery, Prince George's | 42 min |
| May 22, 3:49 PM EDT | Severe Thunderstorm Warning | PHI | Cecil, Kent, Queen Anne's | 56 min |
| May 22, 4:12 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Howard, Prince George's | 48 min |
| May 22, 4:30 PM EDT | Severe Thunderstorm Warning | LWX | Charles | 45 min |
| May 22, 4:44 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 61 min |
| May 22, 4:45 PM EDT | Severe Thunderstorm Warning | LWX | Saint Mary's | 45 min |
| May 22, 4:59 PM EDT | Severe Thunderstorm Warning | PHI | Talbot | 61 min |
| May 22, 5:21 PM EDT | Severe Thunderstorm Warning | LWX | Calvert, Saint Mary's | 54 min |
| May 22, 6:04 PM EDT | Severe Thunderstorm Warning | AKQ | Wicomico, Worcester | 41 min |
| May 22, 6:42 PM EDT | Severe Thunderstorm Warning | AKQ | Worcester | 33 min |
| May 27, 4:20 PM EDT | Severe Thunderstorm Warning | LWX | Frederick | 25 min |
| May 27, 4:40 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll, Frederick, Howard, Montgomery | 50 min |
| May 27, 5:44 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Montgomery | 46 min |
| May 27, 5:48 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's | 42 min |
| May 27, 5:56 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 64 min |
| May 27, 6:18 PM EDT | Severe Thunderstorm Warning | LWX | Howard, Montgomery, Prince George's | 42 min |
| May 27, 7:10 PM EDT | Severe Thunderstorm Warning | LWX | Prince George's | 35 min |
| May 27, 7:15 PM EDT | Severe Thunderstorm Warning | PHI | Caroline | 60 min |
| May 27, 7:37 PM EDT | Severe Thunderstorm Warning | LWX | Calvert, Prince George's | 53 min |
| May 27, 8:58 PM EDT | Severe Thunderstorm Warning | LWX | Saint Mary's | 47 min |
| May 27, 9:42 PM EDT | Severe Thunderstorm Warning | AKQ | Somerset | 48 min |
| Jun 8, 5:48 PM EDT | Severe Thunderstorm Warning | PBZ | Garrett | 24 min |
| Jun 8, 5:52 PM EDT | Severe Thunderstorm Warning | LWX | Allegany | 38 min |
| Jun 8, 6:38 PM EDT | Severe Thunderstorm Warning | LWX | Allegany, Washington | 52 min |
| Jun 8, 9:02 PM EDT | Severe Thunderstorm Warning | LWX | Washington | 24 min |
| Jun 11, 6:43 PM EDT | Severe Thunderstorm Warning | PBZ | Garrett | 32 min |
| Jun 11, 6:58 PM EDT | Severe Thunderstorm Warning | LWX | Washington | 36 min |
| Jun 11, 7:01 PM EDT | Severe Thunderstorm Warning | PBZ | Garrett | 35 min |
| Jun 11, 8:46 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Montgomery, Washington | 33 min |
| Jun 16, 5:23 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 52 min |
| Jun 16, 6:13 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 62 min |
| Jun 16, 7:28 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Montgomery | 62 min |
| Jun 18, 4:05 PM EDT | Severe Thunderstorm Warning | LWX | Allegany | 25 min |
| Jun 18, 10:52 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, Howard, City of Baltimore | 53 min |
| Jun 18, 11:05 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick | 40 min |
| Jun 18, 11:24 PM EDT | Severe Thunderstorm Warning | PBZ | Garrett | 66 min |
| Jun 18, 11:36 PM EDT | Severe Thunderstorm Warning | PHI | Cecil, Kent | 54 min |
| Jun 18, 11:43 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll, Frederick | 47 min |
| Jun 18, 11:53 PM EDT | Severe Thunderstorm Warning | LWX | Charles, Prince George's | 52 min |
| Jun 19, 12:05 AM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, Carroll, Harford, Howard, Montgomery and 2 more | 55 min |
| Jun 19, 12:21 AM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Calvert, Charles, Prince George's | 39 min |
| Jun 19, 12:53 AM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Calvert, Prince George's | 37 min |
| Jun 19, 12:59 AM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, Harford, Howard, Montgomery, Prince George's and 1 more | 46 min |
| Jun 19, 2:01 AM EDT | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's, Talbot | 59 min |
| Jun 25, 10:25 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Calvert, Prince George's | 37 min |
| Jun 25, 10:59 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's, Talbot | 61 min |
| Jul 1, 3:58 PM EDT | Severe Thunderstorm Warning | LWX | Allegany, Washington | 33 min |
| Jul 1, 6:05 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 40 min |
| Jul 2, 11:44 AM EDT | Severe Thunderstorm Warning | LWX | Allegany | 31 min |
| Jul 2, 2:30 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 30 min |
| Jul 2, 2:56 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Montgomery, Washington | 34 min |
| Jul 2, 3:42 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 29 min |
| Jul 2, 4:19 PM EDT | Severe Thunderstorm Warning | LWX | Calvert, Charles, Saint Mary's | 41 min |
| Jul 2, 4:52 PM EDT | Severe Thunderstorm Warning | LWX | Calvert, Saint Mary's | 55 min |
| Jul 2, 5:23 PM EDT | Severe Thunderstorm Warning | LWX | Harford | 52 min |
| Jul 2, 5:57 PM EDT | Severe Thunderstorm Warning | AKQ | Dorchester | 33 min |
| Jul 2, 11:24 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Queen Anne's, Talbot | 66 min |
| Jul 2, 11:47 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Talbot | 58 min |
| Jul 3, 12:04 AM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's | 56 min |
| Jul 3, 12:31 AM EDT | Severe Thunderstorm Warning | LWX | Charles, Saint Mary's | 44 min |
| Jul 3, 3:25 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick, Howard, Montgomery | 50 min |
| Jul 3, 3:50 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 55 min |
| Jul 3, 4:04 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll | 56 min |
| Jul 3, 4:30 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Howard, Montgomery, Prince George's | 60 min |
| Jul 3, 5:03 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, Howard, City of Baltimore | 42 min |
| Jul 3, 5:16 PM EDT | Severe Thunderstorm Warning | LWX | Charles | 44 min |
| Jul 3, 5:24 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Harford | 51 min |
| Jul 3, 5:36 PM EDT | Severe Thunderstorm Warning | PHI | Cecil, Kent | 69 min |
| Jul 3, 6:07 PM EDT | Severe Thunderstorm Warning | LWX | Harford | 38 min |
| Jul 3, 6:21 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 39 min |
| Jul 8, 4:01 PM EDT | Severe Thunderstorm Warning | PBZ | Garrett | 45 min |
| Jul 8, 4:05 PM EDT | Severe Thunderstorm Warning | PBZ | Garrett | 55 min |
| Jul 8, 4:27 PM EDT | Severe Thunderstorm Warning | LWX | Allegany | 52 min |
| Jul 8, 5:09 PM EDT | Severe Thunderstorm Warning | LWX | Allegany, Washington | 51 min |
| Jul 8, 5:30 PM EDT | Severe Thunderstorm Warning | LWX | Washington | 45 min |
| Jul 8, 6:00 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick, Howard, Montgomery, Washington | 45 min |
| Jul 8, 6:23 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Charles, Howard, Montgomery, Prince George's | 52 min |
| Jul 8, 6:39 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, Carroll, Frederick, Harford, Howard and 2 more | 96 min |
| Jul 8, 6:59 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Calvert, Howard, Montgomery, Prince George's | 91 min |
| Jul 8, 7:03 PM EDT | Severe Thunderstorm Warning | PHI | Cecil, Kent, Queen Anne's | 72 min |
| Jul 8, 7:20 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Talbot | 70 min |
| Jul 8, 8:54 PM EDT | Severe Thunderstorm Warning | LWX | Charles, Saint Mary's | 51 min |
| Jul 9, 3:00 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll, Frederick | 45 min |
| Jul 9, 3:40 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll, Harford, City of Baltimore | 50 min |
| Jul 9, 4:26 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Harford | 49 min |
| Jul 9, 4:39 PM EDT | Severe Thunderstorm Warning | PHI | Cecil, Kent | 37 min |
| Jul 9, 5:21 PM EDT | Severe Thunderstorm Warning | LWX | Charles, Prince George's | 39 min |
| Jul 9, 5:52 PM EDT | Severe Thunderstorm Warning | LWX | Calvert, Charles, Prince George's, Saint Mary's | 53 min |
| Jul 9, 6:36 PM EDT | Severe Thunderstorm Warning | LWX | Calvert, Charles, Prince George's, Saint Mary's | 54 min |
| Jul 9, 7:11 PM EDT | Severe Thunderstorm Warning | AKQ | Dorchester, Somerset, Wicomico | 64 min |
| Jul 10, 7:25 PM EDT | Severe Thunderstorm Warning | LWX | Charles, Prince George's | 38 min |
| Jul 10, 9:04 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Harford | 18 min |
| Jul 13, 7:42 PM EDT | Severe Thunderstorm Warning | LWX | Washington | 48 min |
| Jul 13, 8:07 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick, Washington | 38 min |
| Jul 13, 8:24 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick, Howard, Montgomery | 36 min |
| Jul 13, 9:17 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, Howard, Montgomery, Prince George's | 28 min |
| Jul 13, 10:05 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Harford | 40 min |
| Jul 13, 10:14 PM EDT | Severe Thunderstorm Warning | PHI | Cecil, Kent | 46 min |
| Jul 13, 10:48 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Cecil, Kent, Queen Anne's | 37 min |
| Jul 14, 4:48 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Harford | 42 min |
| Jul 14, 4:57 PM EDT | Severe Thunderstorm Warning | LWX | Washington | 33 min |
| Jul 14, 5:26 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Prince George's | 49 min |
| Jul 14, 6:28 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Cecil, Kent, Queen Anne's | 62 min |
| Jul 14, 6:51 PM EDT | Severe Thunderstorm Warning | LWX | Calvert, Saint Mary's | 24 min |
| Jul 14, 7:11 PM EDT | Severe Thunderstorm Warning | AKQ | Dorchester | 49 min |
| Jul 14, 7:16 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's, Talbot | 74 min |
| Jul 14, 7:49 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's | 51 min |
| Jul 14, 8:01 PM EDT | Severe Thunderstorm Warning | AKQ | Dorchester, Wicomico | 29 min |
| Jul 15, 2:07 PM EDT | Severe Thunderstorm Warning | LWX | Howard, Montgomery, Prince George's | 38 min |
| Jul 15, 2:30 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Prince George's | 60 min |
| Jul 15, 2:36 PM EDT | Severe Thunderstorm Warning | AKQ | Dorchester | 39 min |
| Jul 15, 3:01 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Calvert, Charles, Prince George's, Saint Mary's | 59 min |
| Jul 15, 3:12 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel | 16 min |
| Jul 15, 3:18 PM EDT | Severe Thunderstorm Warning | PHI | Cecil, Kent, Queen Anne's | 42 min |
| Jul 15, 3:42 PM EDT | Severe Thunderstorm Warning | PHI | Cecil, Kent | 63 min |
| Jul 15, 4:15 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's, Talbot | 60 min |
| Jul 15, 4:19 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Queen Anne's | 56 min |
| Jul 23, 5:29 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 46 min |
| Jul 23, 5:47 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick, Washington | 58 min |
| Jul 23, 6:42 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll, Howard | 48 min |
| Jul 23, 7:15 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Harford | 45 min |
| Jul 23, 9:51 PM EDT | Severe Thunderstorm Warning | LWX | Calvert, Charles, Saint Mary's | 33 min |
| Jul 27, 11:32 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 58 min |
| Jul 27, 11:35 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll, Harford | 55 min |
| Aug 3, 7:14 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick, Washington | 35 min |
| Aug 3, 8:32 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Montgomery | 28 min |
| Aug 3, 8:42 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll | 48 min |
| Aug 3, 9:19 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, City of Baltimore | 41 min |
| Aug 3, 10:57 PM EDT | Severe Thunderstorm Warning | LWX | Harford | 33 min |
| Aug 20, 2:29 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 28 min |
| Aug 21, 5:06 PM EDT | Severe Thunderstorm Warning | LWX | Harford | 39 min |
| Aug 21, 5:35 PM EDT | Severe Thunderstorm Warning | LWX | Harford | 40 min |
| Aug 21, 7:30 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll, Harford | 45 min |
| Aug 31, 5:45 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 45 min |
| Aug 31, 6:18 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Montgomery, Prince George's | 57 min |
| Sep 1, 3:46 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery, Prince George's | 44 min |
| Sep 2, 2:45 PM EDT | Severe Thunderstorm Warning | PBZ | Garrett | 30 min |
| Sep 2, 2:50 PM EDT | Severe Thunderstorm Warning | LWX | Allegany | 40 min |
| Sep 2, 3:08 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Montgomery | 52 min |
| Sep 2, 3:30 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 45 min |
| Sep 2, 3:52 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 38 min |
| Sep 2, 4:04 PM EDT | Severe Thunderstorm Warning | LWX | Allegany, Washington | 41 min |
| Sep 2, 4:11 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 49 min |
| Sep 2, 4:31 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 44 min |
| Sep 2, 4:39 PM EDT | Severe Thunderstorm Warning | LWX | Howard, Montgomery, Prince George's | 36 min |
| Sep 2, 4:49 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Montgomery, Washington | 41 min |
| Sep 2, 5:15 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll, Frederick, Howard, Montgomery | 45 min |
| Sep 2, 6:20 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Montgomery | 40 min |
| Sep 2, 6:46 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 44 min |
| Sep 2, 6:55 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Howard, Montgomery | 35 min |
| Sep 2, 7:39 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, Howard, City of Baltimore | 51 min |
| Sep 2, 7:51 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Harford, City of Baltimore | 39 min |
| Sep 2, 8:28 PM EDT | Severe Thunderstorm Warning | LWX | Harford | 13 min |
| Sep 2, 8:38 PM EDT | Severe Thunderstorm Warning | PHI | Cecil, Kent | 52 min |
| Sep 6, 1:57 PM EDT | Severe Thunderstorm Warning | LWX | Washington | 28 min |
| Sep 6, 5:15 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 45 min |
| Sep 6, 5:25 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 50 min |
| Sep 6, 6:40 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 50 min |
| Sep 6, 7:36 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, Harford, Howard, City of Baltimore | 39 min |
| Sep 30, 5:19 PM EDT | Severe Thunderstorm Warning | LWX | Washington | 26 min |
| Oct 7, 11:18 PM EDT | Severe Thunderstorm Warning | LWX | Calvert, Saint Mary's | 27 min |
| Oct 7, 11:57 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Talbot | 63 min |
| Nov 6, 3:04 PM EST | Severe Thunderstorm Warning | LWX | Anne Arundel, Calvert, Prince George's | 25 min |
| Nov 6, 3:34 PM EST | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's, Talbot | 41 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Montgomery County39
- Frederick County36
- Washington County32
- Prince George's County29
- Baltimore County28
- Howard County27
- Anne Arundel County24
- Harford County23
- Carroll County21
- Calvert County18
- Cecil County18
- Kent County18
- Charles County18
- Saint Mary's County17
- Queen Anne's County17
- Caroline County16
- Allegany County13
- Talbot County12
- City of Baltimore11
- Garrett County8
- Dorchester County7
- Wicomico County6
- Somerset County5
- Worcester County4
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20132015
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.