Alert archive / Maryland / Areal Flood Warnings
Areal Flood Warnings in Maryland, 2021
99 areal flood warnings in 2021. 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 areal flood warnings reaches back to 2005.
Areal Flood Warnings by county
Each county as a circle sized by its count in 2021. Tap one for its archive.
- Areal Flood Warnings
- 99
- Busiest month
- September34 areal flood warnings
- Busiest day
- September 1, 202114 areal 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 |
|---|---|---|---|---|
| Feb 28, 2:46 PM EST | Areal Flood Warning | LWX | Allegany, Garrett | 29 hr |
| Mar 24, 5:39 PM EDT | Areal Flood Warning | LWX | Anne Arundel, Baltimore, Howard | 2 hr |
| Mar 24, 5:41 PM EDT | Areal Flood Warning | LWX | Saint Mary's | 9 hr |
| Apr 11, 10:03 PM EDT | Areal Flood Warning | LWX | Cecil, Harford | 2 hr |
| Apr 11, 10:18 PM EDT | Areal Flood Warning | LWX | Cecil, Harford | 2 hr |
| May 3, 7:08 PM EDT | Areal Flood Warning | LWX | Washington | 3 hr |
| May 3, 8:47 PM EDT | Areal Flood Warning | LWX | Frederick | 3 hr |
| Jun 3, 4:58 PM EDT | Areal Flood Warning | LWX | Baltimore, Harford | 6 hr |
| Jun 3, 5:55 PM EDT | Areal Flood Warning | LWX | Baltimore, Harford | 34 min |
| Jun 3, 6:46 PM EDT | Areal Flood Warning | LWX | Cecil | 4 hr |
| Jun 3, 9:00 PM EDT | Areal Flood Warning | LWX | Baltimore, Harford | 113 min |
| Jun 8, 3:32 PM EDT | Areal Flood Warning | LWX | Cecil, Harford | 4 hr |
| Jun 8, 5:30 PM EDT | Areal Flood Warning | LWX | Cecil | 90 min |
| Jun 8, 6:23 PM EDT | Areal Flood Warning | LWX | Anne Arundel, Prince George's | 3 hr |
| Jun 9, 6:55 PM EDT | Areal Flood Warning | LWX | Saint Mary's | 2 hr |
| Jun 9, 9:10 PM EDT | Areal Flood Warning | LWX | Saint Mary's | 4 hr |
| Jun 10, 5:10 AM EDT | Areal Flood Warning | LWX | Saint Mary's | 47 min |
| Jun 10, 2:59 PM EDT | Areal Flood Warning | LWX | Baltimore | 38 min |
| Jun 10, 3:03 PM EDT | Areal Flood Warning | LWX | Carroll | 8 hr |
| Jun 10, 3:52 PM EDT | Areal Flood Warning | LWX | Anne Arundel, Prince George's | 17 hr |
| Jun 10, 4:50 PM EDT | Areal Flood Warning | LWX | Baltimore, City of Baltimore | 5 hr |
| Jun 10, 6:03 PM EDT | Areal Flood Warning | LWX | Baltimore, City of Baltimore | 2 hr |
| Jun 10, 6:25 PM EDT | Areal Flood Warning | LWX | Charles, Prince George's | 2 hr |
| Jun 10, 11:03 PM EDT | Areal Flood Warning | LWX | Allegany | 4 hr |
| Jun 11, 9:59 AM EDT | Areal Flood Warning | LWX | Charles | 11 hr |
| Jun 11, 1:40 PM EDT | Areal Flood Warning | LWX | Baltimore, City of Baltimore | 8 hr |
| Jun 11, 1:41 PM EDT | Areal Flood Warning | LWX | Frederick, Washington | 6 hr |
| Jun 15, 1:43 AM EDT | Areal Flood Warning | LWX | Montgomery, Prince George's | 17 min |
| Jun 15, 1:53 AM EDT | Areal Flood Warning | LWX | Prince George's | 4 hr |
| Jun 15, 10:26 AM EDT | Areal Flood Warning | LWX | Prince George's | 9 hr |
| Jul 1, 10:45 PM EDT | Areal Flood Warning | LWX | Montgomery, Prince George's | 3 hr |
| Jul 9, 5:02 PM EDT | Areal Flood Warning | LWX | Prince George's | 3 hr |
| Jul 9, 7:05 PM EDT | Areal Flood Warning | LWX | Calvert, Charles, Prince George's | 3 hr |
| Jul 9, 10:50 PM EDT | Areal Flood Warning | LWX | Charles | 103 min |
| Jul 12, 7:40 PM EDT | Areal Flood Warning | LWX | Baltimore, Cecil, Harford | 6 hr |
| Jul 12, 11:38 PM EDT | Areal Flood Warning | LWX | Carroll | 5 hr |
| Jul 17, 6:01 PM EDT | Areal Flood Warning | LWX | Baltimore, City of Baltimore | 6 hr |
| Jul 17, 6:26 PM EDT | Areal Flood Warning | LWX | Baltimore | 5 hr |
| Jul 25, 11:15 PM EDT | Areal Flood Warning | LWX | Cecil, Harford | 6 hr |
| Jul 26, 12:18 AM EDT | Areal Flood Warning | LWX | Cecil, Harford | 5 hr |
| Jul 26, 5:19 AM EDT | Areal Flood Warning | LWX | Cecil | 4 hr |
| Aug 9, 9:32 PM EDT | Areal Flood Warning | LWX | Montgomery | 105 min |
| Aug 13, 6:06 PM EDT | Areal Flood Warning | LWX | Montgomery | 114 min |
| Aug 13, 6:10 PM EDT | Areal Flood Warning | LWX | Baltimore, City of Baltimore | 110 min |
| Aug 14, 11:54 PM EDT | Areal Flood Warning | LWX | Calvert, Charles, Saint Mary's | 4 hr |
| Aug 15, 1:25 AM EDT | Areal Flood Warning | LWX | Calvert, Charles, Prince George's | 2 hr |
| Aug 17, 2:17 AM EDT | Areal Flood Warning | LWX | Montgomery | 4 hr |
| Aug 20, 6:34 AM EDT | Areal Flood Warning | LWX | Frederick | 2 hr |
| Aug 20, 7:35 AM EDT | Areal Flood Warning | LWX | Montgomery, Prince George's | 9 hr |
| Aug 20, 11:20 AM EDT | Areal Flood Warning | LWX | Anne Arundel, Calvert | 3 hr |
| Aug 22, 2:14 PM EDT | Areal Flood Warning | LWX | Saint Mary's | 2 hr |
| Aug 27, 4:11 PM EDT | Areal Flood Warning | LWX | Montgomery, Prince George's | 3 hr |
| Aug 27, 4:44 PM EDT | Areal Flood Warning | LWX | Prince George's | 3 hr |
| Aug 27, 6:11 PM EDT | Areal Flood Warning | LWX | Charles, Prince George's | 3 hr |
| Aug 27, 6:13 PM EDT | Areal Flood Warning | LWX | Baltimore, Harford | 3 hr |
| Aug 28, 4:24 PM EDT | Areal Flood Warning | LWX | Allegany | 3 hr |
| Sep 1, 3:23 AM EDT | Areal Flood Warning | LWX | Montgomery | 8 hr |
| Sep 1, 3:50 AM EDT | Areal Flood Warning | LWX | Montgomery, Prince George's | 6 hr |
| Sep 1, 4:10 AM EDT | Areal Flood Warning | LWX | Anne Arundel, Baltimore, Howard, City of Baltimore | 6 hr |
| Sep 1, 4:34 AM EDT | Areal Flood Warning | LWX | Montgomery | 6 hr |
| Sep 1, 4:39 AM EDT | Areal Flood Warning | LWX | Anne Arundel, Baltimore, Howard, City of Baltimore | 5 hr |
| Sep 1, 5:41 AM EDT | Areal Flood Warning | LWX | Cecil, Harford | 5 hr |
| Sep 1, 6:15 AM EDT | Areal Flood Warning | LWX | Cecil | 5 hr |
| Sep 1, 12:52 PM EDT | Areal Flood Warning | LWX | Allegany | 22 hr |
| Sep 1, 1:30 PM EDT | Areal Flood Warning | LWX | Carroll, Frederick, Washington | 27 hr |
| Sep 1, 1:46 PM EDT | Areal Flood Warning | LWX | Allegany, Garrett | 16 hr |
| Sep 1, 4:37 PM EDT | Areal Flood Warning | LWX | Baltimore, Carroll, Harford | 13 hr |
| Sep 1, 6:08 PM EDT | Areal Flood Warning | LWX | Cecil, Harford | 17 hr |
| Sep 1, 7:27 PM EDT | Areal Flood Warning | LWX | Allegany, Washington | 15 hr |
| Sep 1, 7:59 PM EDT | Areal Flood Warning | LWX | Carroll, Frederick | 2 hr |
| Sep 1, 8:16 PM EDT | Areal Flood Warning | LWX | Carroll, Frederick | 6 hr |
| Sep 8, 10:18 PM EDT | Areal Flood Warning | LWX | Carroll, Frederick | 3 hr |
| Sep 8, 11:05 PM EDT | Areal Flood Warning | LWX | Carroll, Frederick | 5 hr |
| Sep 8, 11:57 PM EDT | Areal Flood Warning | LWX | Carroll, Frederick, Howard | 4 hr |
| Sep 15, 5:52 PM EDT | Areal Flood Warning | LWX | Washington | 115 min |
| Sep 15, 6:35 PM EDT | Areal Flood Warning | LWX | Frederick, Washington | 113 min |
| Sep 15, 8:24 PM EDT | Areal Flood Warning | LWX | Frederick, Washington | 2 hr |
| Sep 16, 3:21 PM EDT | Areal Flood Warning | LWX | Montgomery, Prince George's | 6 hr |
| Sep 16, 5:36 PM EDT | Areal Flood Warning | LWX | Carroll, Frederick, Howard, Montgomery | 6 hr |
| Sep 16, 6:00 PM EDT | Areal Flood Warning | LWX | Baltimore, City of Baltimore | 4 hr |
| Sep 16, 7:07 PM EDT | Areal Flood Warning | LWX | Carroll, Frederick | 6 hr |
| Sep 23, 2:02 AM EDT | Areal Flood Warning | LWX | Frederick, Washington | 10 hr |
| Sep 23, 3:47 AM EDT | Areal Flood Warning | LWX | Montgomery | 12 hr |
| Sep 23, 3:53 AM EDT | Areal Flood Warning | LWX | Carroll, Frederick | 17 hr |
| Sep 23, 4:41 AM EDT | Areal Flood Warning | LWX | Howard, Montgomery | 9 hr |
| Sep 23, 5:35 AM EDT | Areal Flood Warning | LWX | Carroll, Frederick | 6 hr |
| Sep 23, 8:04 AM EDT | Areal Flood Warning | LWX | Anne Arundel, Baltimore, Harford, Howard, Montgomery, Prince George's and 1 more | 10 hr |
| Sep 23, 9:02 AM EDT | Areal Flood Warning | LWX | Cecil | 9 hr |
| Sep 23, 12:11 PM EDT | Areal Flood Warning | LWX | Frederick | 5 hr |
| Sep 28, 10:12 AM EDT | Areal Flood Warning | LWX | Garrett | 97 min |
| Oct 25, 8:32 PM EDT | Areal Flood Warning | LWX | Montgomery, Prince George's | 7 hr |
| Oct 25, 9:50 PM EDT | Areal Flood Warning | LWX | Anne Arundel, Baltimore, Howard, Montgomery, Prince George's, City of Baltimore | 115 min |
| Oct 25, 9:53 PM EDT | Areal Flood Warning | LWX | Charles, Prince George's | 4 hr |
| Oct 25, 11:51 PM EDT | Areal Flood Warning | PHI | Caroline, Kent, Queen Anne's, Talbot | 6 hr |
| Oct 29, 12:34 PM EDT | Areal Flood Warning | LWX | Montgomery, Prince George's | 9 hr |
| Oct 29, 4:29 PM EDT | Areal Flood Warning | LWX | Anne Arundel, Baltimore, Howard, City of Baltimore | 5 hr |
| Oct 29, 5:30 PM EDT | Areal Flood Warning | LWX | Baltimore, Harford, City of Baltimore | 4 hr |
| Oct 29, 7:21 PM EDT | Areal Flood Warning | LWX | Anne Arundel, Howard | 5 hr |
| Oct 30, 1:42 AM EDT | Areal Flood Warning | LWX | Prince George's | 15 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Prince George's County22
- Baltimore County21
- Montgomery County18
- Frederick County17
- Harford County15
- Cecil County13
- Carroll County13
- City of Baltimore12
- Anne Arundel County10
- Howard County10
- Washington County8
- Charles County8
- Allegany County6
- Saint Mary's County6
- Calvert County4
- Garrett County3
- Caroline County1
- Kent County1
- Queen Anne's County1
- Talbot County1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20202022
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.