Alert archive / Maryland / Flash Flood Warnings / 2011
Flash Flood Warnings in Maryland, September 2011
39 flash flood warnings in September 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 September 2011. Tap one for its archive.
- Flash Flood Warnings
- 39
- Busiest day
- September 8, 201117 flash flood warnings
Over time
By day
Days in UTC, the clock the archive keeps.
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 |
|---|---|---|---|---|
| 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.
- Prince George's County13
- Baltimore County12
- Howard County10
- Montgomery County10
- Charles County10
- Anne Arundel County9
- Saint Mary's County8
- Carroll County7
- City of Baltimore6
- Harford County6
- Calvert County5
- Frederick County5
- Caroline County2
- Cecil County1
- Kent County1
- Queen Anne's County1
- Talbot County1
- Washington County1
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. Warning verification from the Mesonet's Cow. Rebuilt daily.