Alert archive / Maryland / Flash Flood Warnings in 2025

Flash Flood Warning 4, NWS Baltimore/Washington

May 13, 2025Allegany County, Garrett County, Maryland; Mineral County, West Virginia

NWS Baltimore/Washington issued this flash flood warning at May 13, 2025, 12:57 PM EDT for Allegany County, Garrett County, Maryland; Mineral County, West Virginia. It was in force for 5 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
May 13, 2025, 12:57 PM EDT (16:57 UTC)
Expired
May 13, 2025, 6:07 PM EDT
In force
5 hr
Issued by
NWS Baltimore/Washington
Area
Storm-based polygon
Flood severity
None

Counties Allegany County, MD, Garrett County, MD, Mineral County, WV

The radar

The Sterling radar (KLWX), 142 km from the middle of the area, began a volume at 17:00 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 5.0 hours before the alert went out and 138 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Pittsburgh, PA at 12:00Z on 2025-05-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 36 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Pittsburgh, PA at 12:00Z on 2025-05-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 180 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
36 J/kg
Mixed-layer CIN
-13 J/kg
Mixed-layer LCL
558 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
180 m²/s²
0-3 km storm-relative helicity
193 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Baltimore/Washington wrote its last area forecast discussion before this flash flood warning went out at May 13, 10:13 AM EDT, 2 hours 44 minutes earlier.

Area forecast discussion, May 13, 10:13 AM EDT, 2 hours 44 minutes before
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Hazardous weather outlook, May 13, 12:24 PM EDT, 33 minutes before
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In the hours before

Local storm report, May 13, 12:47 PM EDT, 10 minutes before
Preliminary Local Storm Report
National Weather Service Baltimore MD/Washington DC
1247 PM EDT Tue May 13 2025

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1025 AM     Flood            Stratmeade Springs      38.85N  77.24W
05/13/2025                   Fairfax            VA   Mesonet

            The stream gauge on Accotink Creek at Strathmeade
            Springs exceeded minor flood stage.

&&

Event Number LWX2504694

CJL
Local storm report, May 13, 12:51 PM EDT, 6 minutes before
Preliminary Local Storm Report
National Weather Service Baltimore MD/Washington DC
1251 PM EDT Tue May 13 2025

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1145 AM     Flood            Westernport             39.49N  79.04W
05/13/2025                   Allegany           MD   Mesonet

            The stream gauge on Georges Creek near Westernport
            exceeded minor flood stage.

&&

Event Number LWX2504695

CJL

The office that day

Everything else NWS Baltimore/Washington issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 13, 8:48 AM EDTAreal Flood WarningLWXFairfax, Prince William, City of Fairfax, City of Manassas, City of Manassas Park4 hr
May 13, 11:37 AM EDTRiver Flood WatchLWXCulpeper, Fauquier32 hr
May 13, 11:37 AM EDTRiver Flood WatchLWXLoudoun21 days
May 13, 11:37 AM EDTRiver Flood WatchLWXClarke, Warren62 hr
May 13, 1:02 PM EDTGale WarningLWX13 hr
May 13, 1:02 PM EDTSmall Craft AdvisoryLWX20 hr
May 13, 1:37 PM EDTAreal Flood WarningLWXRockingham11 hr
May 13, 3:46 PM EDTAreal Flood WarningLWXFairfax6 hr
May 13, 4:09 PM EDTRiver Flood WatchLWXLoudoun21 days
May 13, 4:09 PM EDTRiver Flood WatchLWXFairfax, City of Fairfax18 hr
May 13, 4:26 PM EDTAreal Flood WarningLWXAlbemarle, Augusta, Nelson, City of Waynesboro15 hr
May 13, 4:44 PM EDTFlash Flood Warning Considerable damage threatLWXAlbemarle, Augusta, Nelson3 hr
May 13, 4:48 PM EDTAreal Flood WarningLWXGreene, Madison, Page, Rockingham26 hr
May 13, 5:24 PM EDTFlash Flood WarningLWXAlbemarle3 hr
May 13, 5:34 PM EDTAreal Flood WarningLWXClarke, Frederick, Page, Rockingham, Shenandoah, Warren and 2 more18 hr
May 13, 5:56 PM EDTAreal Flood WarningLWXCulpeper, Fauquier, Loudoun, Page, Prince William, Rappahannock and 1 more16 hr
May 13, 6:25 PM EDTFlash Flood WarningLWXAlbemarle, Greene, Madison, Orange, City of Charlottesville6 hr
May 13, 6:48 PM EDTFlash Flood WarningLWXNelson2 hr
May 13, 7:25 PM EDTAreal Flood WarningLWXAlbemarle, Augusta, Nelson7 hr
May 13, 7:31 PM EDTAreal Flood WarningLWXFairfax4 hr
May 13, 11:37 AM EDTRiver Flood WatchLWXWashington10 hr
May 13, 12:23 PM EDTAreal Flood WarningLWXAllegany, Garrett37 min
May 13, 12:41 PM EDTAreal Flood WarningLWXAllegany, Garrett16 min
May 13, 1:00 PM EDTFlash Flood Warning Considerable damage threatLWXAllegany, Garrett5 hr
May 13, 1:52 PM EDTFlash Flood WarningLWXGarrett4 hr
May 13, 2:20 PM EDTRiver Flood WarningLWXAllegany19 hr
May 13, 2:49 PM EDTFlash Flood Warning EmergencyCatastrophic damage threatLWXAllegany3 hr
May 13, 3:59 PM EDTRiver Flood WarningLWXAllegany24 hr
May 13, 4:00 PM EDTRiver Flood WarningLWXWashington46 hr
May 13, 4:02 PM EDTRiver Flood WarningLWXAllegany37 hr
May 13, 4:06 PM EDTRiver Flood WatchLWXWashington56 hr
May 13, 4:09 PM EDTRiver Flood WarningLWXAllegany21 days
May 13, 5:23 PM EDTAreal Flood WarningLWXAllegany6 hr
May 13, 5:27 PM EDTAreal Flood WarningLWXGarrett6 hr
May 13, 6:00 PM EDTAreal Flood WarningLWXAllegany, Garrett6 hr
May 13, 6:07 PM EDTAreal Flood WarningLWXAllegany, Garrett32 hr
May 13, 12:35 PM EDTAreal Flood WarningLWXGrant, Hampshire, Hardy, Mineral, Pendleton12 hr
May 13, 4:02 PM EDTRiver Flood WarningLWXBerkeley, Jefferson40 hr
May 13, 4:03 PM EDTRiver Flood WarningLWXMorgan66 hr
May 13, 4:09 PM EDTRiver Flood WatchLWXHampshire, Hardy21 days
May 13, 5:40 PM EDTAreal Flood WarningLWXHampshire, Hardy8 hr

Nearby

Flash Flood Warnings in Maryland, 2025Flash Flood Warnings in West Virginia, 2025Every flash flood warning in 2025

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.