Areal Flood Warnings in Maryland
1,049 areal flood warnings since 1986. 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 since 1986. Tap one for its archive.
- Areal Flood Warnings
- 1,049
- Busiest year
- 2018233 areal flood warnings
- Average year
- 52over 20 years on file
Over time
By year
Before late 2005 the archive holds only tornado, severe thunderstorm, flash flood and marine warnings, and from 1997 SPC's watches, so the jump that year is the archive widening, not the weather.
By month of the year
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Baltimore County233
- Prince George's County214
- Montgomery County198
- Anne Arundel County154
- Howard County151
- City of Baltimore128
- Frederick County121
- Harford County116
- Carroll County111
- Saint Mary's County84
- Charles County76
- Washington County70
- Allegany County67
- Cecil County63
- Calvert County54
- Garrett County45
- Caroline County42
- Worcester County32
- Queen Anne's County28
- Talbot County26
- Wicomico County25
- Kent County21
- Somerset County19
- Dorchester County14
The latest areal flood warnings
The most recent on file, newest first.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 11, 5:35 AM EDT | Areal Flood Warning | LWX | Garrett | 8 hr |
| Jul 28, 7:18 PM EDT | Areal Flood Warning | LWX | Anne Arundel, Baltimore, City of Baltimore | 50 min |
| Jul 22, 12:27 AM EDT | Areal Flood Warning | LWX | Anne Arundel, Howard | 4 hr |
| Jul 9, 6:56 PM EDT | Areal Flood Warning | LWX | Baltimore, City of Baltimore | 64 min |
| Jul 9, 3:26 PM EDT | Areal Flood Warning | LWX | Frederick | 94 min |
| Jul 6, 11:43 PM EDT | Areal Flood Warning | LWX | Montgomery | 99 min |
| Jul 6, 8:40 PM EDT | Areal Flood Warning | LWX | Baltimore, City of Baltimore | 80 min |
| May 27, 11:15 AM EDT | Areal Flood Warning | LWX | Allegany | 2 hr |
| May 27, 5:40 AM EDT | Areal Flood Warning | LWX | Garrett | 5 hr |
| Mar 16, 3:33 PM EDT | Areal Flood Warning | LWX | Montgomery | 2 hr |
Nearby
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.