Alert archive / Virginia / Flash Flood Warnings in 2020

Flash Flood Warning 39, NWS Charleston, WV

July 21, 2020Buchanan County, Dickenson County, Virginia

NWS Charleston, WV issued this flash flood warning at Jul 21, 2020, 6:04 PM EDT for Buchanan County, Dickenson County, Virginia. It was in force for 36 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 21, 2020, 6:04 PM EDT (22:04 UTC)
Expired: Jul 21, 2020, 6:40 PM EDT
In force: 36 min
Issued by: NWS Charleston, WV
Area: Storm-based polygon
Flood severity: None

Counties Buchanan County, VA, Dickenson County, VA

The radar

The Jackson,KY radar (KJKL), 109 km from the middle of the area, began a volume at 22:06 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

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 10.1 hours before the alert went out and 238 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 909 J/kg
Mixed-layer CIN: -147 J/kg
Mixed-layer LCL: 1148 m above ground
0-6 km bulk shear: 2 kt
0-1 km storm-relative helicity: 16 m²/s²
0-3 km storm-relative helicity: 33 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

885 
WGUS51 KRLX 212204
FFWRLX
VAC027-051-220115-
/O.NEW.KRLX.FF.W.0039.200721T2204Z-200722T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Charleston WV
604 PM EDT Tue Jul 21 2020

The National Weather Service in Charleston has issued a

* Flash Flood Warning for...
  Southwestern Buchanan County in southwestern Virginia...
  East Central Dickenson County in southwestern Virginia...

* Until 915 PM EDT.

* At 604 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 2 inches of rain 
  have fallen. Flash flooding is ongoing or expected to begin 
  shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Doppler radar.

  IMPACT...Flooding of small creeks and streams, urban areas,
           highways, streets and underpasses as well as other
           drainage and low lying areas.

* Some locations that will experience flash flooding include...
  mainly rural areas of Southwestern Buchanan and East Central 
  Dickenson Counties

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 3718 8222 3718 8221 3713 8213 3708 8215
      3707 8222 3711 8226 3719 8230

FLASH FLOOD...RADAR INDICATED

$$

ARJ

1 follow-up statement

406 
WGUS71 KRLX 212240
FFSRLX

Flash Flood Statement
National Weather Service Charleston WV
640 PM EDT Tue Jul 21 2020

VAC027-051-212250-
/O.CAN.KRLX.FF.W.0039.000000T0000Z-200722T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Buchanan VA-Dickenson VA-
640 PM EDT Tue Jul 21 2020

...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHWESTERN BUCHANAN AND 
EAST CENTRAL DICKENSON COUNTIES...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures.

LAT...LON 3718 8222 3718 8221 3713 8213 3708 8215
      3707 8222 3711 8226 3719 8230

$$

JZ

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 21, 5:45 PM EDT	Special Weather Statement	RLX	Buchanan	30 min

Nearby

Flash Flood Warnings in Virginia, 2020 Every flash flood warning in 2020

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.