Alert archive / West Virginia / Flash Flood Warnings in 2021

Flash Flood Warning 107, NWS Charleston, WV

August 30, 2021McDowell County, West Virginia; Buchanan County, Virginia

NWS Charleston, WV issued this flash flood warning at Aug 30, 2021, 2:12 PM EDT for McDowell County, West Virginia; Buchanan County, 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 outline as issued.

The facts

Issued
Aug 30, 2021, 2:12 PM EDT (18:12 UTC)
Expired
Aug 30, 2021, 7:15 PM EDT
In force
5 hr
Issued by
NWS Charleston, WV
Area
Storm-based polygon
Flood severity
None

Counties Buchanan County, VA, McDowell County, WV

The nearest sounding before it

Roanoke, VA (KRNK), launched 12:00Z, 6.2 hours before the alert went out and 221 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, Roanoke, VA at 12:00Z on 2021-08-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 747 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Roanoke, VA at 12:00Z on 2021-08-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 53 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
747 J/kg
Mixed-layer CIN
-69 J/kg
Mixed-layer LCL
804 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
53 m²/s²
0-3 km storm-relative helicity
94 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

As transmitted.

276 
WGUS51 KRLX 301812
FFWRLX
VAC027-WVC047-302115-
/O.NEW.KRLX.FF.W.0107.210830T1812Z-210830T2115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Charleston WV
212 PM EDT Mon Aug 30 2021

The National Weather Service in Charleston has issued a

* Flash Flood Warning for...
  North Central Buchanan County in southwestern Virginia...
  West Central McDowell County in southern West Virginia...

* Until 515 PM EDT.

* At 212 PM EDT, Doppler radar indicated thunderstorms produced 
  heavy rain across the warned area. Between 2 and 4 inches of rain 
  have fallen.  Flash flooding is ongoing.

  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.

* Some locations that will experience flash flooding include...
  Hurley and Panther.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Please report Severe Weather to the National Weather Service by 
calling toll free, 800 401 9535, when you can do so safely. You may 
also report severe weather by posting your report to the Charleston 
West Virginia National Weather Service Facebook Page, or by using 
the Twitter Hashtag, NWSRLX.

&&

LAT...LON 3742 8214 3754 8197 3753 8197 3753 8196
      3752 8195 3751 8194 3752 8194 3746 8185
      3741 8186

FLASH FLOOD...RADAR INDICATED

$$

SL
1 follow-up statement
489 
WGUS51 KRLX 302040
FFWRLX
VAC027-WVC047-302315-
/O.EXT.KRLX.FF.W.0107.000000T0000Z-210830T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Charleston WV
440 PM EDT Mon Aug 30 2021

The National Weather Service in Charleston has extended the

* Flash Flood Warning for...
  North Central Buchanan County in southwestern Virginia...
  West Central McDowell County in southern West Virginia...

* Until 715 PM EDT.

* At 440 PM EDT, The heavy rain that caused the flash flooding 
  earlier today has ended.  However, flash flooding continues to be 
  reported in the Hurley area.

  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.

* Some locations that will experience flash flooding include...
  Hurley and Panther.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Please report Severe Weather to the National Weather Service by 
calling toll free, 800 401 9535, when you can do so safely. You may 
also report severe weather by posting your report to the Charleston 
West Virginia National Weather Service Facebook Page, or by using 
the Twitter Hashtag, NWSRLX.

&&

LAT...LON 3742 8214 3754 8197 3753 8197 3753 8196
      3752 8195 3751 8194 3752 8194 3746 8185
      3741 8186

FLASH FLOOD...RADAR INDICATED

$$

JSH

The office that day

Everything else NWS Charleston, WV issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 30, 3:48 AM EDTFlash Flood WatchRLXBarbour, Boone, Braxton, Cabell, Calhoun, Clay and 28 more58 hr
Aug 30, 7:40 AM EDTSpecial Weather StatementRLXRaleigh35 min
Aug 30, 9:12 AM EDTFlash Flood WarningRLXLogan, McDowell, Mingo, Wyoming5 hr
Aug 30, 10:17 AM EDTRiver Flood WarningRLXCalhoun, Gilmer67 hr
Aug 30, 10:19 AM EDTRiver Flood WarningRLXCalhoun, Wirt3 days
Aug 30, 11:07 AM EDTFlash Flood WarningRLXMcDowell3 hr
Aug 30, 12:09 PM EDTSpecial Weather StatementRLXLincoln36 min
Aug 30, 12:52 PM EDTFlash Flood WarningRLXBoone, Lincoln, Logan, Wayne3 hr
Aug 30, 2:12 PM EDTFlash Flood WarningRLXMcDowell5 hr
Aug 30, 5:06 PM EDTFlash Flood WarningRLXCabell, Wayne4 hr
Aug 30, 7:08 PM EDTAreal Flood WarningRLXMcDowell6 hr

Nearby

Flash Flood Warnings in West Virginia, 2021Flash Flood Warnings in 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.