Alert archive / Maryland / River Flood Watches
River Flood Watches in Maryland, 2021
24 river 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 river flood watches reaches back to 2005.
River Flood Watches by county
Each county as a circle sized by its count in 2021. Tap one for its archive.
- River Flood Watches
- 24
- Busiest month
- August10 river flood watches
- Busiest day
- August 31, 202110 river 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 |
|---|---|---|---|---|
| Feb 28, 10:55 AM EST | River Flood Watch | LWX | Allegany | 17 hr |
| Feb 28, 10:55 AM EST | River Flood Watch | LWX | Washington | 56 hr |
| Feb 28, 10:55 AM EST | River Flood Watch | LWX | Washington | 21 days |
| Feb 28, 10:55 AM EST | River Flood Watch | LWX | Frederick | 21 days |
| Feb 28, 10:55 AM EST | River Flood Watch | LWX | Montgomery | 21 days |
| Mar 1, 3:22 AM EST | River Flood Watch | LWX | Montgomery | 23 hr |
| Aug 31, 12:56 AM EDT | River Flood Watch | LWX | Washington | 24 hr |
| Aug 31, 12:56 AM EDT | River Flood Watch | LWX | Allegany | 21 days |
| Aug 31, 12:56 AM EDT | River Flood Watch | LWX | Washington | 21 days |
| Aug 31, 12:56 AM EDT | River Flood Watch | LWX | Frederick | 21 days |
| Aug 31, 12:56 AM EDT | River Flood Watch | LWX | Allegany | 64 hr |
| Aug 31, 11:28 AM EDT | River Flood Watch | LWX | Allegany | 21 days |
| Aug 31, 11:29 AM EDT | River Flood Watch | LWX | Montgomery | 63 hr |
| Aug 31, 11:40 AM EDT | River Flood Watch | LWX | Washington | 21 days |
| Aug 31, 11:43 AM EDT | River Flood Watch | LWX | Washington | 21 days |
| Aug 31, 11:45 AM EDT | River Flood Watch | LWX | Washington | 28 hr |
| Aug 31, 9:44 PM EDT | River Flood Watch | LWX | Frederick | 25 hr |
| Aug 31, 9:44 PM EDT | River Flood Watch | LWX | Montgomery | 48 hr |
| Aug 31, 9:44 PM EDT | River Flood Watch | LWX | Washington | 25 hr |
| Aug 31, 9:44 PM EDT | River Flood Watch | LWX | Montgomery | 25 hr |
| Sep 1, 4:13 PM EDT | River Flood Watch | LWX | Cecil | 7 hr |
| Sep 2, 12:55 AM EDT | River Flood Watch | LWX | Washington | 4 hr |
| Sep 2, 5:01 AM EDT | River Flood Watch | LWX | Cecil | 6 hr |
| Sep 2, 11:26 AM EDT | River Flood Watch | LWX | Frederick | 33 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 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.