Alert archive / Maryland / Flash Flood Watches

Flash Flood Watches in Maryland, 2021

24 flash flood watches 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 flash flood watches reaches back to 2005.

Flash Flood Watches by county

Each county as a circle sized by its count in 2021. Tap one for its archive.

Flash Flood Watches: 24
Busiest month: August11 flash flood watches
Busiest day: July 7, 20213 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.

Issued	Product	Office	Counties	Lasted
Jun 3, 8:56 AM EDT	Flash Flood Watch	LWX	Baltimore, Carroll, Cecil, Frederick, Harford, Howard and 2 more	13 hr
Jun 10, 2:53 AM EDT	Flash Flood Watch	LWX	Allegany, Anne Arundel, Baltimore, Calvert, Carroll, Charles and 8 more	43 hr
Jun 10, 10:14 AM EDT	Flash Flood Watch	AKQ	Dorchester, Somerset, Wicomico, Worcester	10 hr
Jun 14, 10:25 PM EDT	Flash Flood Watch	LWX	Anne Arundel, Charles, Montgomery, Prince George's	4 hr
Jun 30, 2:23 PM EDT	Flash Flood Watch	LWX	Anne Arundel, Baltimore, Calvert, Carroll, Cecil, Charles and 7 more	42 hr
Jul 7, 3:12 PM EDT	Flash Flood Watch	LWX	Anne Arundel, Baltimore, Calvert, Cecil, Charles, Harford and 3 more	33 hr
Jul 7, 3:22 PM EDT	Flash Flood Watch	AKQ	Dorchester, Somerset, Wicomico, Worcester	36 hr
Jul 7, 3:32 PM EDT	Flash Flood Watch	PHI	Caroline, Kent, Queen Anne's, Talbot	42 hr
Jul 16, 10:20 PM EDT	Flash Flood Watch	LWX	Anne Arundel, Baltimore, Cecil, Harford, Howard, Montgomery and 2 more	24 hr
Aug 14, 6:14 PM EDT	Flash Flood Watch	LWX	Anne Arundel, Calvert, Charles, Howard, Montgomery, Prince George's	10 hr
Aug 15, 5:47 PM EDT	Flash Flood Watch	LWX	Charles	18 hr
Aug 17, 8:54 AM EDT	Flash Flood Watch	LWX	Anne Arundel, Baltimore, Cecil, Harford, City of Baltimore	9 hr
Aug 17, 1:54 PM EDT	Flash Flood Watch	LWX	Allegany, Baltimore, Carroll, Frederick, Harford, Howard and 3 more	27 hr
Aug 19, 2:11 PM EDT	Flash Flood Watch	LWX	Allegany, Anne Arundel, Baltimore, Calvert, Charles, Howard and 4 more	28 hr
Aug 19, 2:57 PM EDT	Flash Flood Watch	AKQ	Dorchester, Somerset, Wicomico	31 hr
Aug 19, 3:22 PM EDT	Flash Flood Watch	PHI	Caroline, Kent, Queen Anne's, Talbot	23 hr
Aug 27, 2:56 AM EDT	Flash Flood Watch	LWX	Anne Arundel, Baltimore, Cecil, Harford, Howard, Montgomery and 2 more	17 hr
Aug 30, 4:54 AM EDT	Flash Flood Watch	LWX	Allegany, Anne Arundel, Baltimore, Calvert, Carroll, Cecil and 9 more	62 hr
Aug 30, 5:00 AM EDT	Flash Flood Watch	PHI	Caroline, Kent, Queen Anne's, Talbot	71 hr
Aug 30, 11:48 AM EDT	Flash Flood Watch	LWX	Anne Arundel, Baltimore, Charles, Harford, Howard, Montgomery and 2 more	6 hr
Sep 8, 6:11 PM EDT	Flash Flood Watch	LWX	Anne Arundel, Baltimore, Carroll, Cecil, Frederick, Harford and 4 more	10 hr
Sep 16, 2:44 PM EDT	Flash Flood Watch	LWX	Anne Arundel, Baltimore, Carroll, Frederick, Harford, Howard and 3 more	6 hr
Sep 21, 3:04 AM EDT	Flash Flood Watch	LWX	Allegany, Baltimore, Carroll, Cecil, Frederick, Harford and 4 more	57 hr
Oct 25, 5:50 PM EDT	Flash Flood Watch	LWX	Anne Arundel, Baltimore, Howard, Montgomery, Prince George's, City of Baltimore	5 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.

Nearby

Alerts in force now Tornadoes on record The radar archive 2020 2022

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.