Alert archive / Maryland / Flash Flood Warnings
Flash Flood Warnings in Maryland, 2011
110 flash flood warnings in 2011. 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 flash flood warnings reaches back to 1986.
Flash Flood Warnings by county
Each county as a circle sized by its count in 2011. Tap one for its archive.
- Flash Flood Warnings
- 110
- Busiest month
- September39 flash flood warnings
- Busiest day
- September 8, 201117 flash flood warnings
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 |
|---|---|---|---|---|
| Mar 10, 5:48 PM EST | Flash Flood Warning | LWX | Charles, Montgomery, Prince George's | 4 hr |
| Mar 10, 6:07 PM EST | Flash Flood Warning | LWX | Carroll, Frederick, Washington | 3 hr |
| Mar 10, 6:29 PM EST | Flash Flood Warning | LWX | Anne Arundel, Baltimore, Carroll, Frederick, Harford, Howard and 2 more | 4 hr |
| Apr 16, 8:56 PM EDT | Flash Flood Warning | LWX | Baltimore, City of Baltimore | 94 min |
| Apr 27, 7:21 PM EDT | Flash Flood Warning | LWX | Anne Arundel, Charles, Prince George's | 69 min |
| Apr 28, 12:35 AM EDT | Flash Flood Warning | LWX | Allegany | 5 hr |
| Apr 28, 1:33 AM EDT | Flash Flood Warning | LWX | Allegany, Washington | 4 hr |
| Apr 28, 3:04 AM EDT | Flash Flood Warning | LWX | Washington | 7 hr |
| Apr 28, 7:27 AM EDT | Flash Flood Warning | LWX | Carroll, Frederick, Howard, Montgomery | 5 hr |
| Apr 28, 8:01 AM EDT | Flash Flood Warning | LWX | Frederick, Washington | 119 min |
| Apr 28, 9:45 AM EDT | Flash Flood Warning | LWX | Montgomery | 101 min |
| Apr 28, 10:36 AM EDT | Flash Flood Warning | LWX | Baltimore, Carroll, Harford | 102 min |
| May 13, 2:15 PM EDT | Flash Flood Warning | PBZ | Garrett | 2 hr |
| May 17, 5:45 PM EDT | Flash Flood Warning | LWX | Allegany, Washington | 3 hr |
| May 18, 2:45 PM EDT | Flash Flood Warning | LWX | Baltimore, Harford | 3 hr |
| May 18, 4:03 PM EDT | Flash Flood Warning | LWX | Allegany | 3 hr |
| May 19, 12:22 PM EDT | Flash Flood Warning | LWX | Baltimore | 3 hr |
| May 26, 4:09 PM EDT | Flash Flood Warning | LWX | Allegany | 4 hr |
| May 27, 4:57 PM EDT | Flash Flood Warning | LWX | Allegany | 6 hr |
| May 27, 5:38 PM EDT | Flash Flood Warning | LWX | Allegany | 3 hr |
| Jun 19, 12:06 PM EDT | Flash Flood Warning | AKQ | Somerset | 84 min |
| Jul 3, 3:14 AM EDT | Flash Flood Warning | LWX | Carroll, Frederick | 3 hr |
| Jul 7, 4:58 PM EDT | Flash Flood Warning | LWX | Allegany | 91 min |
| Jul 7, 5:36 PM EDT | Flash Flood Warning | LWX | Harford | 113 min |
| Jul 7, 6:21 PM EDT | Flash Flood Warning | LWX | Baltimore, City of Baltimore | 3 hr |
| Jul 7, 8:15 PM EDT | Flash Flood Warning | LWX | Anne Arundel, Baltimore, Howard, City of Baltimore | 3 hr |
| Jul 7, 11:11 PM EDT | Flash Flood Warning | LWX | Baltimore, City of Baltimore | 3 hr |
| Jul 7, 11:28 PM EDT | Flash Flood Warning | LWX | Washington | 3 hr |
| Jul 8, 3:24 PM EDT | Flash Flood Warning | LWX | Carroll, Frederick, Washington | 3 hr |
| Jul 8, 3:33 PM EDT | Flash Flood Warning | LWX | Baltimore, Carroll, Frederick, Howard, Montgomery | 3 hr |
| Jul 8, 3:49 PM EDT | Flash Flood Warning | LWX | Baltimore, Carroll, Harford, Howard, City of Baltimore | 3 hr |
| Jul 8, 4:10 PM EDT | Flash Flood Warning | LWX | Anne Arundel, Howard, Montgomery, Prince George's | 3 hr |
| Jul 8, 5:07 PM EDT | Flash Flood Warning | LWX | Anne Arundel, Prince George's | 3 hr |
| Jul 8, 6:34 PM EDT | Flash Flood Warning | LWX | Calvert, Charles, Saint Mary's | 76 min |
| Jul 13, 3:45 PM EDT | Flash Flood Warning | LWX | Charles, Prince George's | 3 hr |
| Jul 22, 2:56 PM EDT | Flash Flood Warning | LWX | Washington | 106 min |
| Jul 25, 2:01 AM EDT | Flash Flood Warning | LWX | Calvert, Saint Mary's | 2 hr |
| Jul 25, 3:16 PM EDT | Flash Flood Warning | LWX | Anne Arundel, Baltimore, Howard, Montgomery, Prince George's, City of Baltimore | 97 min |
| Jul 25, 3:37 PM EDT | Flash Flood Warning | LWX | Charles | 2 hr |
| Aug 14, 1:12 AM EDT | Flash Flood Warning | PHI | Cecil | 4 hr |
| Aug 14, 2:27 AM EDT | Flash Flood Warning | PHI | Caroline, Kent, Queen Anne's | 4 hr |
| Aug 14, 3:29 AM EDT | Flash Flood Warning | LWX | Anne Arundel, Charles, Prince George's | 3 hr |
| Aug 14, 5:03 AM EDT | Flash Flood Warning | PHI | Cecil, Kent, Queen Anne's | 4 hr |
| Aug 14, 7:43 AM EDT | Flash Flood Warning | PHI | Kent, Queen Anne's | 4 hr |
| Aug 14, 8:41 AM EDT | Flash Flood Warning | PHI | Cecil, Kent, Queen Anne's | 4 hr |
| Aug 14, 12:18 PM EDT | Flash Flood Warning | LWX | Baltimore, Harford, City of Baltimore | 2 hr |
| Aug 14, 9:23 PM EDT | Flash Flood Warning | LWX | Montgomery, Prince George's | 3 hr |
| Aug 14, 9:54 PM EDT | Flash Flood Warning | LWX | Frederick, Montgomery | 3 hr |
| Aug 14, 11:27 PM EDT | Flash Flood Warning | LWX | Baltimore, Carroll, Howard, City of Baltimore | 77 min |
| Aug 15, 8:01 AM EDT | Flash Flood Warning | LWX | Anne Arundel, Baltimore, City of Baltimore | 3 hr |
| Aug 15, 9:23 AM EDT | Flash Flood Warning | LWX | Baltimore, City of Baltimore | 3 hr |
| Aug 15, 1:10 PM EDT | Flash Flood Warning | LWX | Baltimore, City of Baltimore | 118 min |
| Aug 15, 1:38 PM EDT | Flash Flood Warning | PHI | Cecil, Kent, Queen Anne's | 4 hr |
| Aug 15, 4:33 PM EDT | Flash Flood Warning | LWX | Prince George's | 80 min |
| Aug 18, 5:02 PM EDT | Flash Flood Warning | LWX | Anne Arundel | 3 hr |
| Aug 18, 5:26 PM EDT | Flash Flood Warning | LWX | Baltimore, Harford, City of Baltimore | 3 hr |
| Aug 18, 5:44 PM EDT | Flash Flood Warning | LWX | Montgomery | 3 hr |
| Aug 18, 6:01 PM EDT | Flash Flood Warning | LWX | Carroll, Frederick, Howard | 81 min |
| Aug 19, 5:15 PM EDT | Flash Flood Warning | LWX | Allegany | 3 hr |
| Aug 19, 6:00 PM EDT | Flash Flood Warning | LWX | Baltimore | 118 min |
| Aug 19, 7:28 PM EDT | Flash Flood Warning | LWX | Prince George's | 101 min |
| Aug 21, 1:39 PM EDT | Flash Flood Warning | LWX | Baltimore, City of Baltimore | 3 hr |
| Aug 21, 4:45 PM EDT | Flash Flood Warning | PHI | Kent | 3 hr |
| Aug 25, 5:47 PM EDT | Flash Flood Warning | LWX | Calvert, Charles, Saint Mary's | 97 min |
| Aug 27, 12:50 PM EDT | Flash Flood Warning | LWX | Calvert, Saint Mary's | 6 hr |
| Aug 27, 5:09 PM EDT | Flash Flood Warning | LWX | Anne Arundel, Calvert, Charles, Prince George's, Saint Mary's | 9 hr |
| Aug 27, 5:26 PM EDT | Flash Flood Warning | LWX | Anne Arundel, Howard, Montgomery, Prince George's | 9 hr |
| Aug 27, 6:24 PM EDT | Flash Flood Warning | LWX | Anne Arundel, Baltimore, Harford, City of Baltimore | 9 hr |
| Aug 27, 7:27 PM EDT | Flash Flood Warning | PHI | Caroline, Queen Anne's, Talbot | 12 hr |
| Aug 27, 8:28 PM EDT | Flash Flood Warning | PHI | Cecil, Kent, Queen Anne's | 12 hr |
| Aug 27, 9:38 PM EDT | Flash Flood Warning | LWX | Baltimore, Carroll, Harford, Howard, Montgomery | 6 hr |
| Sep 5, 10:04 PM EDT | Flash Flood Warning | LWX | Howard, Montgomery | 4 hr |
| Sep 5, 10:17 PM EDT | Flash Flood Warning | LWX | Baltimore, Carroll, Howard, City of Baltimore | 2 hr |
| Sep 6, 7:31 PM EDT | Flash Flood Warning | LWX | Calvert, Saint Mary's | 3 hr |
| Sep 6, 10:21 PM EDT | Flash Flood Warning | PHI | Caroline, Cecil, Kent, Queen Anne's, Talbot | 3 hr |
| Sep 7, 9:51 AM EDT | Flash Flood Warning | LWX | Baltimore, City of Baltimore | 12 hr |
| Sep 7, 10:47 AM EDT | Flash Flood Warning | LWX | Charles, Prince George's | 7 hr |
| Sep 7, 11:33 AM EDT | Flash Flood Warning | LWX | Anne Arundel, Baltimore, Carroll, Howard, Prince George's | 10 hr |
| Sep 7, 11:38 AM EDT | Flash Flood Warning | LWX | Charles | 3 hr |
| Sep 7, 12:18 PM EDT | Flash Flood Warning | LWX | Charles, Prince George's, Saint Mary's | 5 hr |
| Sep 7, 1:14 PM EDT | Flash Flood Warning | LWX | Carroll, Howard, Montgomery | 3 hr |
| Sep 7, 1:28 PM EDT | Flash Flood Warning | LWX | Anne Arundel, Calvert, Prince George's, Saint Mary's | 3 hr |
| Sep 7, 1:58 PM EDT | Flash Flood Warning | LWX | Baltimore, Harford | 8 hr |
| Sep 7, 9:09 PM EDT | Flash Flood Warning | LWX | Charles, Montgomery, Prince George's | 3 hr |
| Sep 7, 10:03 PM EDT | Flash Flood Warning | LWX | Anne Arundel, Baltimore, Carroll, Harford, Howard, Montgomery and 2 more | 6 hr |
| Sep 7, 10:26 PM EDT | Flash Flood Warning | LWX | Anne Arundel, Baltimore, Calvert, Charles, Prince George's, Saint Mary's | 6 hr |
| Sep 7, 11:37 PM EDT | Flash Flood Warning | LWX | Carroll, Frederick | 3 hr |
| Sep 8, 12:45 AM EDT | Flash Flood Warning | LWX | Anne Arundel, Calvert, Charles, Prince George's, Saint Mary's | 4 hr |
| Sep 8, 1:17 AM EDT | Flash Flood Warning | LWX | Anne Arundel, Calvert, Saint Mary's | 104 min |
| Sep 8, 5:54 AM EDT | Flash Flood Warning | LWX | Anne Arundel, Baltimore, Charles, Harford, Howard, Prince George's and 1 more | 3 hr |
| Sep 8, 7:26 AM EDT | Flash Flood Warning | LWX | Baltimore, Harford | 3 hr |
| Sep 8, 10:28 AM EDT | Flash Flood Warning | LWX | Frederick, Montgomery | 9 hr |
| Sep 8, 12:23 PM EDT | Flash Flood Warning | LWX | Charles | 11 hr |
| Sep 8, 1:00 PM EDT | Flash Flood Warning | LWX | Montgomery | 6 hr |
| Sep 8, 2:31 PM EDT | Flash Flood Warning | LWX | Montgomery | 5 hr |
| Sep 8, 3:53 PM EDT | Flash Flood Warning | PHI | Caroline | 4 hr |
| Sep 8, 4:41 PM EDT | Flash Flood Warning | LWX | Charles, Prince George's, Saint Mary's | 4 hr |
| Sep 8, 5:27 PM EDT | Flash Flood Warning | LWX | Montgomery, Prince George's | 3 hr |
| Sep 8, 6:25 PM EDT | Flash Flood Warning | LWX | Carroll, Frederick, Howard | 74 min |
| Sep 8, 7:01 PM EDT | Flash Flood Warning | LWX | Frederick, Montgomery | 4 hr |
| Sep 8, 8:32 PM EDT | Flash Flood Warning | LWX | Charles, Montgomery, Prince George's, Saint Mary's | 4 hr |
| Sep 9, 5:36 AM EDT | Flash Flood Warning | LWX | Baltimore | 3 hr |
| Sep 10, 7:41 PM EDT | Flash Flood Warning | LWX | Baltimore, Harford | 90 min |
| Sep 11, 2:48 PM EDT | Flash Flood Warning | LWX | Howard | 59 min |
| Sep 11, 5:02 PM EDT | Flash Flood Warning | LWX | Howard | 44 min |
| Sep 14, 6:10 PM EDT | Flash Flood Warning | LWX | Washington | 68 min |
| Sep 23, 11:13 AM EDT | Flash Flood Warning | LWX | Carroll, Frederick | 4 hr |
| Sep 23, 12:34 PM EDT | Flash Flood Warning | LWX | Anne Arundel, Baltimore, Howard, City of Baltimore | 3 hr |
| Sep 23, 3:06 PM EDT | Flash Flood Warning | LWX | Anne Arundel, Baltimore, Harford, City of Baltimore | 4 hr |
| Sep 28, 8:18 PM EDT | Flash Flood Warning | LWX | Prince George's | 107 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Baltimore County33
- Prince George's County25
- Montgomery County22
- Anne Arundel County21
- Howard County21
- City of Baltimore21
- Charles County18
- Carroll County18
- Harford County15
- Frederick County14
- Saint Mary's County13
- Calvert County10
- Washington County9
- Allegany County9
- Kent County8
- Queen Anne's County8
- Cecil County6
- Caroline County4
- Talbot County2
- Garrett County1
- Somerset County1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20102012
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.