Alert archive / West Virginia / Flash Flood Warnings in 2021
Flash Flood Warning 57, NWS Baltimore/Washington
NWS Baltimore/Washington issued this flash flood warning at Aug 28, 2021, 6:32 PM EDT for Grant County, West Virginia. It was in force for 3 hr. 2 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
- Aug 28, 2021, 6:32 PM EDT (22:32 UTC)
- Expired
- Aug 28, 2021, 9:23 PM EDT
- In force
- 3 hr
- Issued by
- NWS Baltimore/Washington
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
County Grant County, WV
The radar
The Sterling radar (KLWX), 150 km from the middle of the area, began a volume at 22:33 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 |
|---|---|---|---|
| Aug 28, 6:58 PM EDT | FLASH FLOOD | 5 Wsw Cabins, WV | MULTIPLE ROADS CLOSED DUE TO HIGH WATER FLOWING ACROSS THE ROAD. SEVERAL STREAMS ARE OVERFLOWING THEIR BANKS IN THE SOUTHWEST PORTION OF GRANT COUNTY. |
| Aug 28, 7:59 PM EDT | FLOOD | Maysville, WV | ROUTE 42 IN MAYSVILLE CLOSED DUE TO HIGH WATER. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 10.5 hours before the alert went out and 158 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
- 425 J/kg
- Mixed-layer CIN
- -107 J/kg
- Mixed-layer LCL
- 898 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- -11 m²/s²
- 0-3 km storm-relative helicity
- 11 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
317
WGUS51 KLWX 282232
FFWLWX
WVC023-290145-
/O.NEW.KLWX.FF.W.0057.210828T2232Z-210829T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Baltimore MD/Washington DC
632 PM EDT Sat Aug 28 2021
The National Weather Service in Sterling Virginia has issued a
* Flash Flood Warning for...
Central Grant County in eastern West Virginia...
* Until 945 PM EDT.
* At 632 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 ongoing or expected
to begin shortly.
HAZARD...Life threatening flash flooding. Thunderstorms
producing flash flooding.
SOURCE...Radar.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
* Some locations that will experience flash flooding include...
Streby... Kline Gap...
Maysville... Hopeville...
This includes the following streams and drainages...
Patterson Creek, Little Star Run, North Fork South Branch Potomac
River, South Branch Potomac River, Broad Run, Jordan Run, Norman
Run, Big Run, Redman Run, Saltblock Run, Moyer Run, Lunice Creek,
Robinson Run, South Fork Lunice Creek, Big Star Run, Laurel Run,
Middle Fork Patterson Creek and North Fork Patterson Creek.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3919 7919 3916 7911 3892 7927 3895 7934
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
RCM1 follow-up statement
264 WGUS71 KLWX 290123 FFSLWX Flash Flood Statement National Weather Service Baltimore MD/Washington DC 923 PM EDT Sat Aug 28 2021 WVC023-290133- /O.CAN.KLWX.FF.W.0057.000000T0000Z-210829T0145Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Grant WV- 923 PM EDT Sat Aug 28 2021 ...FLASH FLOOD WARNING IS CANCELLED FOR CENTRAL GRANT COUNTY... Flood waters are receding. The heavy rain has ended. Additional flooding is no longer expected to pose a threat. Please continue to heed remaining road closures. A flood warning remains in effect for existing high water which has yet to subside. LAT...LON 3919 7919 3916 7911 3892 7927 3895 7934 $$ RCM
The office that day
Everything else NWS Baltimore/Washington issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 28, 4:46 PM EDT | Severe Thunderstorm Warning | LWX | Berkeley, Hampshire, Morgan | 25 min |
| Aug 28, 4:56 PM EDT | Severe Thunderstorm Warning | LWX | Berkeley, Jefferson | 49 min |
| Aug 28, 5:04 PM EDT | Severe Thunderstorm Warning | LWX | Berkeley, Jefferson | 41 min |
| Aug 28, 5:27 PM EDT | Areal Flood Warning | LWX | Berkeley, Jefferson | 3 hr |
| Aug 28, 6:15 PM EDT | Areal Flood Warning | LWX | Grant | 3 hr |
| Aug 28, 6:51 PM EDT | Areal Flood Warning | LWX | Hardy | 3 hr |
| Aug 28, 7:20 PM EDT | Areal Flood Warning | LWX | Grant, Hardy | 3 hr |
Nearby
Flash Flood Warnings in West Virginia, 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.