Alert archive / Maryland / Flash Flood Watches

Flash Flood Watches in Maryland, 2020

42 flash flood watches in 2020. 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 watches reaches back to 2005.

Flash Flood Watches by county

Each county as a circle sized by its count in 2020. Tap one for its archive.

Flash Flood Watches
42
Busiest month
August18 flash flood watches
Busiest day
June 5, 20203 flash flood watches

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.

IssuedProductOfficeCountiesLasted
Feb 11, 12:59 PM ESTFlash Flood WatchPBZ42 hr
May 3, 7:35 PM EDTFlash Flood WatchLWXAnne Arundel, Calvert, Charles, Montgomery, Prince George's5 hr
Jun 4, 10:51 PM EDTFlash Flood WatchLWXAnne Arundel, Montgomery, Prince George's4 hr
Jun 5, 3:40 AM EDTFlash Flood WatchLWXAnne Arundel, Baltimore, Carroll, Charles, Frederick, Harford and 5 more17 hr
Jun 5, 9:47 AM EDTFlash Flood WatchPHICecil, Kent12 hr
Jun 19, 12:37 PM EDTFlash Flood WatchLWXAllegany7 hr
Jun 20, 10:45 AM EDTFlash Flood WatchLWXAnne Arundel, Baltimore, Howard, Montgomery, Prince George's, City of Baltimore10 hr
Jun 22, 5:23 PM EDTFlash Flood WatchLWXHoward, Montgomery116 min
Jun 23, 1:58 PM EDTFlash Flood WatchLWXAllegany, Baltimore, Carroll, Frederick, Washington, City of Baltimore10 hr
Jul 6, 12:41 PM EDTFlash Flood WatchLWXAnne Arundel, Baltimore, Calvert, Charles, Harford, Howard and 4 more15 hr
Jul 6, 12:52 PM EDTFlash Flood WatchPHICecil8 hr
Jul 9, 3:00 PM EDTFlash Flood WatchPHICaroline, Cecil, Kent, Queen Anne's, Talbot30 hr
Jul 9, 4:07 PM EDTFlash Flood WatchAKQDorchester, Somerset, Wicomico, Worcester20 hr
Jul 22, 1:36 PM EDTFlash Flood WatchLWXAnne Arundel, Baltimore, Carroll, Charles, Frederick, Harford and 4 more4 hr
Jul 23, 8:13 PM EDTFlash Flood WatchLWXMontgomery, Prince George's4 hr
Jul 24, 6:01 PM EDTFlash Flood WatchLWXAnne Arundel, Baltimore, Harford, Howard, Prince George's, City of Baltimore3 hr
Jul 28, 10:34 AM EDTFlash Flood WatchLWXCharles, Montgomery, Prince George's9 hr
Jul 30, 10:01 PM EDTFlash Flood WatchLWXAnne Arundel, Baltimore, Carroll, Charles, Frederick, Howard and 4 more20 hr
Aug 1, 6:53 PM EDTFlash Flood WatchLWXMontgomery, Prince George's7 hr
Aug 2, 3:26 PM EDTFlash Flood WatchAKQDorchester, Somerset, Wicomico43 hr
Aug 2, 3:28 PM EDTFlash Flood WatchLWXAnne Arundel, Baltimore, Calvert, Carroll, Charles, Frederick and 7 more45 hr
Aug 2, 3:33 PM EDTFlash Flood WatchPHICaroline, Cecil, Kent, Queen Anne's, Talbot48 hr
Aug 5, 10:51 PM EDTFlash Flood WatchLWXAnne Arundel, Baltimore, Calvert, Carroll, Charles, Frederick and 7 more25 hr
Aug 6, 3:37 AM EDTFlash Flood WatchPHICaroline, Cecil, Kent, Queen Anne's, Talbot44 hr
Aug 6, 10:43 AM EDTFlash Flood WatchAKQDorchester, Somerset, Wicomico, Worcester15 hr
Aug 7, 2:43 AM EDTFlash Flood WatchAKQDorchester, Somerset, Wicomico, Worcester19 hr
Aug 7, 3:46 AM EDTFlash Flood WatchLWXAnne Arundel, Baltimore, Calvert, Carroll, Charles, Frederick and 6 more21 hr
Aug 11, 3:19 PM EDTFlash Flood WatchLWXAllegany, Anne Arundel, Baltimore, Calvert, Carroll, Charles and 8 more52 hr
Aug 11, 3:48 PM EDTFlash Flood WatchPHICaroline, Cecil, Kent, Queen Anne's, Talbot28 hr
Aug 12, 3:13 AM EDTFlash Flood WatchAKQDorchester, Wicomico19 hr
Aug 13, 1:49 AM EDTFlash Flood WatchLWXAllegany19 hr
Aug 13, 2:25 AM EDTFlash Flood WatchAKQDorchester, Somerset, Wicomico, Worcester17 hr
Aug 13, 3:02 AM EDTFlash Flood WatchPHICaroline, Cecil, Kent, Queen Anne's, Talbot17 hr
Aug 15, 3:21 AM EDTFlash Flood WatchAKQDorchester, Somerset, Wicomico, Worcester33 hr
Aug 15, 10:22 PM EDTFlash Flood WatchLWXCalvert, Charles, Saint Mary's11 hr
Aug 28, 4:59 PM EDTFlash Flood WatchLWXAnne Arundel, Baltimore, Howard, Montgomery, Prince George's, City of Baltimore11 hr
Sep 9, 2:15 PM EDTFlash Flood WatchLWXAnne Arundel, Baltimore, Calvert, Carroll, Charles, Harford and 5 more30 hr
Sep 9, 2:26 PM EDTFlash Flood WatchAKQDorchester, Somerset, Wicomico, Worcester31 hr
Sep 9, 5:08 PM EDTFlash Flood WatchPHICaroline, Cecil, Kent, Queen Anne's, Talbot29 hr
Nov 11, 10:30 AM ESTFlash Flood WatchAKQDorchester, Somerset, Wicomico, Worcester31 hr
Nov 11, 10:46 AM ESTFlash Flood WatchLWXAnne Arundel, Calvert, Charles, Montgomery, Prince George's, Saint Mary's16 hr
Dec 23, 4:27 AM ESTFlash Flood WatchLWXAllegany, Anne Arundel, Baltimore, Calvert, Carroll, Cecil and 9 more47 hr

By county

Every county with at least one alert. A county page lists each alert that covered it.

The busiest days

Days with the most alerts issued, by UTC date.

  1. June 5, 20203flash flood watches
  2. August 2, 20203flash flood watches
  3. August 6, 20203flash flood watches
  4. August 13, 20203flash flood watches
  5. September 9, 20203flash flood watches
  6. July 6, 20202flash flood watches
  7. July 9, 20202flash flood watches
  8. July 24, 20202flash flood watches
  9. August 7, 20202flash flood watches
  10. August 11, 20202flash flood watches
  11. November 11, 20202flash flood watches
  12. February 11, 20201flash flood watches

Nearby

Alerts in force nowTornadoes on recordThe radar archive20192021

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.