Alert archive / West Virginia / Flash Flood Warnings in 2021

Flash Flood Warning 8, NWS Baltimore/Washington

June 10, 2021Hampshire County, West Virginia

NWS Baltimore/Washington issued this flash flood warning at Jun 10, 2021, 5:16 PM EDT for Hampshire County, West Virginia. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jun 10, 2021, 5:16 PM EDT (21:16 UTC)
Expired
Jun 10, 2021, 7:44 PM EDT
In force
2 hr
Issued by
NWS Baltimore/Washington
Area
Storm-based polygon
Damage threat
Considerable
Flood severity
None

County Hampshire County, WV

The radar

The Sterling radar (KLWX), 98 km from the middle of the area, began a volume at 21:18 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

Washington/Dulle, VA (KIAD), launched 12:00Z, 9.3 hours before the alert went out and 106 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, Washington/Dulle, VA at 12:00Z on 2021-06-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 163 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, Washington/Dulle, VA at 12:00Z on 2021-06-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -6 square meters per square second.1939Sfc1 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
163 J/kg
Mixed-layer CIN
-61 J/kg
Mixed-layer LCL
987 m above ground
0-6 km bulk shear
6 kt
0-1 km storm-relative helicity
-6 m²/s²
0-3 km storm-relative helicity
6 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

492 
WGUS51 KLWX 102116
FFWLWX
WVC027-110015-
/O.NEW.KLWX.FF.W.0008.210610T2116Z-210611T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Baltimore MD/Washington DC
516 PM EDT Thu Jun 10 2021

The National Weather Service in Sterling Virginia has issued a

* Flash Flood Warning for...
  Northeastern Hampshire County in eastern West Virginia...

* Until 815 PM EDT.

* At 516 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 3 inches of rain 
  have fallen. Flash flooding is ongoing or expected to begin 
  shortly.

  HAZARD...Life threatening flash flooding. Thunderstorms
           producing flash flooding.

  SOURCE...Doppler radar.

  IMPACT...Life threatening flash flooding of creeks and streams,
           urban areas, highways, streets and underpasses.

* Some locations that may experience flash flooding include...
  Slanesville...                     Levels...
  Higginsville...                    Largent...
  Points...                          Bloomery...

Additional rainfall amounts up to 1 inch are possible in the warned 
area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

A Flash Flood Warning means that flooding is imminent or occurring. 
If you are in the warned area move to higher ground immediately. 
Residents living along streams and creeks should take immediate 
precautions to protect life and property.

&&

LAT...LON 3936 7836 3936 7851 3938 7860 3942 7863
      3953 7861 3954 7859 3953 7859 3952 7857
      3952 7852 3952 7847 3949 7842 3947 7835
      3944 7835 3943 7835 3941 7836 3940 7835
      3939 7835 3939 7834

FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

BKF
1 follow-up statement
979 
WGUS71 KLWX 102344
FFSLWX

Flash Flood Statement
National Weather Service Baltimore MD/Washington DC
744 PM EDT Thu Jun 10 2021

WVC027-102354-
/O.CAN.KLWX.FF.W.0008.000000T0000Z-210611T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hampshire WV-
744 PM EDT Thu Jun 10 2021

...FLASH FLOOD WARNING FOR NORTHEASTERN HAMPSHIRE COUNTY HAS BEEN 
REPLACED WITH A FLOOD WARNING...

LAT...LON 3936 7836 3936 7851 3938 7860 3942 7863
      3953 7861 3954 7859 3953 7859 3952 7857
      3952 7852 3952 7847 3949 7842 3947 7835
      3944 7835 3943 7835 3941 7836 3940 7835
      3939 7835 3939 7834

$$

BKF

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 10, 2:53 AM EDTFlash Flood WatchLWXBerkeley, Grant, Hampshire, Hardy, Jefferson, Mineral and 2 more43 hr
Jun 10, 5:56 PM EDTFlash Flood Warning Considerable damage threatLWXBerkeley2 hr
Jun 10, 6:54 PM EDTFlash Flood Warning Considerable damage threatLWXHampshire, Hardy3 hr
Jun 10, 7:44 PM EDTAreal Flood WarningLWXHampshire3 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.