Alert archive / West Virginia / Flash Flood Warnings in 2021
Flash Flood Warning 64, NWS Baltimore/Washington
NWS Baltimore/Washington issued this flash flood warning at Sep 1, 2021, 8:39 AM EDT for Grant County, Mineral County, West Virginia; Allegany County, Garrett County, Maryland. It was in force for 5 hr. 6 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Sep 1, 2021, 8:39 AM EDT (12:39 UTC)
- Expired
- Sep 1, 2021, 1:46 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, Grant County, WV, Mineral County, WV
The radar
The Pittsburgh radar (KPBZ), 162 km from the middle of the area, began a volume at 12:40 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Sep 1, 12:15 PM EDT | FLOOD | 4 Sse Mc Henry, MD | GLENDALE ROAD AT ZEDDOCK MILLER ROAD CLOSED DUE TO STANDING HIGH WATER. |
| Sep 1, 12:15 PM EDT | FLOOD | 4 Wnw Mc Henry, MD | SANG RUN ROAD AT OAKLAND SANG RUN ROAD CLOSED DUE TO HIGH WATER. |
| Sep 1, 12:15 PM EDT | FLOOD | Frostburg, MD | SEVERAL ROADS CLOSED DUE TO FLOODING. |
| Sep 1, 12:15 PM EDT | FLOOD | Mount Savage, MD | SEVERAL ROADS CLOSED IN/NEAR MOUNT SAVAGE DUE TO HIGH WATER. |
| Sep 1, 12:47 PM EDT | FLOOD | 1 Sw Mount Savage, MD | MD-36 MOUNT SAVAGE ROAD NORTHWEST WAS CLOSED IN BOTH DIRECTIONS DUE TO FLOODING AT JENNINGS RUN NEAR MD-638 PARKERSBURG ROAD NORTHWEST. |
| Sep 1, 1:05 PM EDT | FLASH FLOOD | Midland, MD | 5 REPORTS OF ROADS CLOSED IN WESTERN ALLEGANY COUNTY, MAINLY NEAR GEORGES CREEK AND MOUNT SAVAGE. 1 SWIFT WATER RESCUE OF INDIVIDUAL CAUGHT IN FLOOD WATERS. THEY WERE FOUND. GEORGES CREEK EXPECTED TO BEGIN FLOODING IN MIDLAND ITSELF WITHIN 10 MINS. GEORGES CRE |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Pittsburgh, PA (KPIT), launched 12:00Z, 0.7 hours before the alert went out and 145 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 666 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- -93 m²/s²
- 0-3 km storm-relative helicity
- -7 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
315
WGUS51 KLWX 011239
FFWLWX
MDC001-023-WVC023-057-011800-
/O.NEW.KLWX.FF.W.0064.210901T1239Z-210901T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Baltimore MD/Washington DC
839 AM EDT Wed Sep 1 2021
The National Weather Service in Sterling Virginia has issued a
* Flash Flood Warning for...
Western Allegany County in western Maryland...
Garrett County in western Maryland...
Northwestern Grant County in eastern West Virginia...
Southwestern Mineral County in eastern West Virginia...
* Until 200 PM EDT.
* At 839 AM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. The expected rainfall rate is 1
to 3 inches in 1 hour. Flash flooding is ongoing or expected to
begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban
areas, highways, streets and underpasses as well as
other poor drainage and low-lying areas.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Please report observed flooding to local emergency services or law
enforcement and request they pass this information to the National
Weather Service when you can do so safely.
&&
LAT...LON 3972 7948 3972 7875 3897 7933 3898 7934
3907 7930 3909 7936 3912 7933 3915 7933
3920 7930 3921 7931 3921 7934 3920 7936
3920 7938 3919 7940 3919 7944 3918 7947
3919 7949
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-3 INCHES IN 1 HOUR
$$
CS2 follow-up statements
420
WGUS71 KLWX 011700
FFSLWX
Flash Flood Statement
National Weather Service Baltimore MD/Washington DC
100 PM EDT Wed Sep 1 2021
MDC001-023-WVC023-057-011800-
/O.CON.KLWX.FF.W.0064.000000T0000Z-210901T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Allegany MD-Garrett MD-Grant WV-Mineral WV-
100 PM EDT Wed Sep 1 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 2 PM EDT THIS
AFTERNOON FOR WESTERN ALLEGANY, GARRETT, NORTHWESTERN GRANT AND
SOUTHWESTERN MINERAL COUNTIES...
At 100 PM EDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 2 and 3 inches of rain have
fallen. Additional rainfall amounts of 1 to 3 inches are possible in
the warned area. Flash flooding is already occurring.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar and observations.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
This includes some of the following Flood Prone areas:
Midland near Georges Creek...
Lonaconing near Georges Creek and Koontz Run...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Those along any streams or creeks in this warning should closely
monitor river levels and SEEK HIGHER GROUND IF NECESSARY. They may
rise quickly.
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Please report observed flooding to local emergency services or law
enforcement and request they pass this information to the National
Weather Service when you can do so safely.
&&
LAT...LON 3972 7948 3972 7875 3897 7933 3898 7934
3907 7930 3909 7936 3912 7933 3915 7933
3920 7930 3921 7931 3921 7934 3920 7936
3920 7938 3919 7940 3919 7944 3918 7947
3919 7949
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-3 INCHES IN 1 HOUR
$$
CS295
WGUS71 KLWX 011746
FFSLWX
Flash Flood Statement
National Weather Service Baltimore MD/Washington DC
146 PM EDT Wed Sep 1 2021
MDC001-023-WVC023-057-011756-
/O.CAN.KLWX.FF.W.0064.000000T0000Z-210901T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Allegany MD-Garrett MD-Grant WV-Mineral WV-
146 PM EDT Wed Sep 1 2021
...FLASH FLOOD WARNING FOR WESTERN ALLEGANY, GARRETT, NORTHWESTERN
GRANT AND SOUTHWESTERN MINERAL COUNTIES HAS BEEN REPLACED WITH A
FLOOD WARNING...
The heavy rain has ended. Flooding is no longer expected to pose a
significant threat. Please continue to heed remaining road closures.
A Flash Flood Watch remains in effect until 200 AM EDT Thursday for
portions of Maryland, Virginia and West Virginia.
LAT...LON 3972 7948 3972 7875 3897 7933 3898 7934
3907 7930 3909 7936 3912 7933 3915 7933
3920 7930 3921 7931 3921 7934 3920 7936
3920 7938 3919 7940 3919 7944 3918 7947
3919 7949
$$
BKFThe office that day
Everything else NWS Baltimore/Washington issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 31, 9:44 PM EDT | River Flood Watch | LWX | Jefferson | 25 hr |
| Sep 1, 12:52 PM EDT | Areal Flood Warning | LWX | Hampshire, Mineral | 22 hr |
| Sep 1, 1:30 PM EDT | Areal Flood Warning | LWX | Berkeley, Jefferson, Morgan | 27 hr |
| Sep 1, 1:46 PM EDT | Areal Flood Warning | LWX | Grant, Mineral | 16 hr |
| Sep 1, 3:36 PM EDT | Wind Advisory | LWX | Berkeley, Morgan | 7 hr |
| Aug 31, 9:06 PM EDT | Coastal Flood Watch | LWX | Anne Arundel | 22 hr |
| Aug 31, 9:36 PM EDT | River Flood Warning | LWX | Washington | 68 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 | Montgomery | 25 hr |
| Sep 1, 3:23 AM EDT | Areal Flood Warning | LWX | Montgomery | 8 hr |
| Sep 1, 3:24 AM EDT | Severe Thunderstorm Warning | LWX | Montgomery, Prince George's | 51 min |
| Sep 1, 3:50 AM EDT | Areal Flood Warning | LWX | Montgomery, Prince George's | 6 hr |
| Sep 1, 4:00 AM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Prince George's | 60 min |
| Sep 1, 4:10 AM EDT | Areal Flood Warning | LWX | Anne Arundel, Baltimore, Howard, City of Baltimore | 6 hr |
| Sep 1, 4:34 AM EDT | Areal Flood Warning | LWX | Montgomery | 6 hr |
| Sep 1, 4:39 AM EDT | Areal Flood Warning | LWX | Anne Arundel, Baltimore, Howard, City of Baltimore | 5 hr |
| Sep 1, 4:50 AM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, City of Baltimore | 40 min |
| Sep 1, 5:41 AM EDT | Areal Flood Warning | LWX | Cecil, Harford | 5 hr |
| Sep 1, 6:15 AM EDT | Areal Flood Warning | LWX | Cecil | 5 hr |
| Sep 1, 10:14 AM EDT | Coastal Flood Advisory | LWX | Anne Arundel, Baltimore, Calvert, Cecil, Harford, Saint Mary's and 1 more | 19 hr |
| Sep 1, 1:11 PM EDT | Tornado Warning | LWX | Charles, Prince George's | 34 min |
| Sep 1, 1:23 PM EDT | Tornado Warning | LWX | Charles | 17 min |
| Sep 1, 1:31 PM EDT | Tornado Warning | LWX | Charles, Saint Mary's | 29 min |
| Sep 1, 1:56 PM EDT | Tornado Warning | LWX | Anne Arundel, Prince George's | 34 min |
| Sep 1, 2:12 PM EDT | Tornado Warning | LWX | Baltimore | 33 min |
| Sep 1, 2:23 PM EDT | Tornado Warning | LWX | Baltimore | 15 min |
| Sep 1, 2:26 PM EDT | Flash Flood Warning | LWX | Carroll, Frederick | 6 hr |
| Sep 1, 2:26 PM EDT | Tornado Warning | LWX | Baltimore, Harford | 14 min |
| Sep 1, 2:27 PM EDT | Tornado Warning | LWX | Anne Arundel | 15 min |
| Sep 1, 2:48 PM EDT | Tornado Warning | LWX | Baltimore, Harford | 27 min |
| Sep 1, 3:10 PM EDT | Tornado Warning | LWX | Baltimore | 16 min |
| Sep 1, 3:17 PM EDT | Tornado Warning | LWX | Harford | 28 min |
| Sep 1, 3:25 PM EDT | Flash Flood Warning | LWX | Carroll, Frederick | 5 hr |
| Sep 1, 3:34 PM EDT | Flash Flood Warning | LWX | Cecil, Harford | 3 hr |
| Sep 1, 3:49 PM EDT | Tornado Warning | LWX | Cecil, Harford | 26 min |
| Sep 1, 4:13 PM EDT | River Flood Watch | LWX | Cecil | 7 hr |
| Sep 1, 4:13 PM EDT | River Flood Warning | LWX | Allegany | 7 hr |
| Sep 1, 4:14 PM EDT | River Flood Warning | LWX | Allegany | 9 hr |
| Sep 1, 4:37 PM EDT | Areal Flood Warning | LWX | Baltimore, Carroll, Harford | 13 hr |
| Sep 1, 5:46 PM EDT | Tornado Warning | LWX | Cecil | 29 min |
| Sep 1, 6:08 PM EDT | Areal Flood Warning | LWX | Cecil, Harford | 17 hr |
| Sep 1, 6:12 PM EDT | Tornado Warning | LWX | Cecil | 19 min |
| Sep 1, 7:03 PM EDT | Coastal Flood Warning | LWX | Anne Arundel | 8 hr |
| Sep 1, 7:27 PM EDT | Areal Flood Warning | LWX | Allegany, Washington | 15 hr |
| Sep 1, 7:59 PM EDT | Areal Flood Warning | LWX | Carroll, Frederick | 2 hr |
Nearby
Flash Flood Warnings in West Virginia, 2021Flash Flood Warnings in Maryland, 2021Every flash flood warning in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.