Alert archive / West Virginia / Flash Flood Warnings in 2021

Flash Flood Warning 80, NWS Charleston, WV

August 11, 2021Boone County, Kanawha County, West Virginia

NWS Charleston, WV issued this flash flood warning at Aug 11, 2021, 8:51 AM EDT for Boone County, Kanawha County, West Virginia. It was in force for 5 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 11, 2021, 8:51 AM EDT (12:51 UTC)
Expired: Aug 11, 2021, 2:00 PM EDT
In force: 5 hr
Issued by: NWS Charleston, WV
Area: Storm-based polygon
Flood severity: None

Counties Boone County, WV, Kanawha County, WV

The radar

The Charleston,WV radar (KRLX), 32 km from the middle of the area, began a volume at 12:52 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 11, 11:00 AM EDT	FLASH FLOOD	4 Nw Sylvester, WV	HIGH WATER ON PRINTER ROAD IN SEVERAL PLACES.
Aug 11, 12:03 PM EDT	HEAVY RAIN 2.48	6 Ese Madison, WV	2.48 INCHES OF RAIN AT WILLIAMS HILL RAIN GAGE IN THE LAST 6 HOURS

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Roanoke, VA (KRNK), launched 12:00Z, 0.9 hours before the alert went out and 208 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: 506 J/kg
Mixed-layer CIN: -72 J/kg
Mixed-layer LCL: 998 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: -44 m²/s²
0-3 km storm-relative helicity: -29 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

939 
WGUS51 KRLX 111251
FFWRLX
WVC005-039-111600-
/O.NEW.KRLX.FF.W.0080.210811T1251Z-210811T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Charleston WV
851 AM EDT Wed Aug 11 2021

The National Weather Service in Charleston has issued a

* Flash Flood Warning for...
  Central Boone County in central West Virginia...
  South Central Kanawha County in central West Virginia...

* Until noon EDT.

* At 851 AM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 2 and 2.5 inches of 
  rain have fallen. Additional rainfall amounts of 0.5 to 1 inch are 
  possible in the warned area. 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.

* Some locations that will experience flash flooding include...
  Madison, Van, Danville, Whitesville, Sylvester, Seth, Prenter, 
  Racine, Foster, Ashford and Turtle Creek.

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 3810 8144 3798 8152 3797 8154 3795 8156
      3794 8156 3793 8157 3792 8156 3802 8189
      3815 8181 3818 8178 3818 8163

FLASH FLOOD...RADAR INDICATED

$$

JLB

3 follow-up statements

442 
WGUS71 KRLX 111430
FFSRLX

Flash Flood Statement
National Weather Service Charleston WV
1030 AM EDT Wed Aug 11 2021

WVC005-039-111600-
/O.CON.KRLX.FF.W.0080.000000T0000Z-210811T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Boone WV-Kanawha WV-
1030 AM EDT Wed Aug 11 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL NOON EDT TODAY FOR 
CENTRAL BOONE AND SOUTH CENTRAL KANAWHA COUNTIES...

At 1030 AM 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 0.5 to 1 inch are 
possible in the warned area. 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.

Some locations that will experience flash flooding include...
  Madison, Van, Danville, Whitesville, Sylvester, Seth, Prenter, 
  Racine, Foster, Ashford and Turtle Creek.

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 3810 8144 3798 8152 3797 8154 3795 8156
      3794 8156 3793 8157 3792 8156 3802 8189
      3815 8181 3818 8178 3818 8163

FLASH FLOOD...RADAR INDICATED

$$

JLB

257 
WGUS51 KRLX 111538 RRA
FFWRLX
WVC005-039-111800-
/O.EXT.KRLX.FF.W.0080.000000T0000Z-210811T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Charleston WV
1138 AM EDT Wed Aug 11 2021

The National Weather Service in Charleston has extended the

* Flash Flood Warning for...
  Central Boone County in central West Virginia...
  South Central Kanawha County in central West Virginia...

* Until 200 PM EDT.

* At 1138 AM 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 1.5 inch are 
  possible in the warned area. 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.

* Some locations that will experience flash flooding include...
  Madison, Van, Danville, Whitesville, Sylvester, Seth, Prenter, 
  Racine, Foster, Ashford and Turtle Creek.

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 3810 8144 3798 8152 3797 8154 3795 8156
      3794 8156 3793 8157 3792 8156 3802 8189
      3815 8181 3818 8178 3818 8163

FLASH FLOOD...RADAR INDICATED

$$

JLB

420 
WGUS71 KRLX 111751
FFSRLX

Flash Flood Statement
National Weather Service Charleston WV
151 PM EDT Wed Aug 11 2021

WVC005-039-111801-
/O.EXP.KRLX.FF.W.0080.000000T0000Z-210811T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Boone WV-Kanawha WV-
151 PM EDT Wed Aug 11 2021

...FLASH FLOOD WARNING WILL EXPIRE AT 2 PM EDT THIS AFTERNOON FOR 
CENTRAL BOONE AND SOUTH CENTRAL KANAWHA COUNTIES...

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

LAT...LON 3810 8144 3798 8152 3797 8154 3795 8156
      3794 8156 3793 8157 3792 8156 3802 8189
      3815 8181 3818 8178 3818 8163

$$

JLB

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 11, 7:55 AM EDT	Special Weather Statement	RLX	Randolph	35 min
Aug 11, 8:39 AM EDT	Special Weather Statement	RLX	Boone	51 min
Aug 11, 9:57 AM EDT	Flash Flood Warning	RLX	Boone, Logan, Raleigh, Wyoming	3 hr
Aug 11, 10:04 AM EDT	Special Weather Statement	RLX	Clay, Nicholas	41 min
Aug 11, 10:23 AM EDT	Special Weather Statement	RLX	Kanawha	37 min
Aug 11, 11:38 AM EDT	Flash Flood Warning	RLX	Braxton, Clay, Fayette, Nicholas	3 hr
Aug 11, 12:33 PM EDT	Special Weather Statement	RLX	Pleasants, Ritchie	27 min
Aug 11, 12:38 PM EDT	Special Weather Statement	RLX	Randolph	37 min
Aug 11, 1:47 PM EDT	Heat Advisory	RLX	Boone, Braxton, Cabell, Calhoun, Clay, Doddridge and 17 more	30 hr
Aug 11, 2:03 PM EDT	Special Weather Statement	RLX	Lincoln, Wayne	27 min
Aug 11, 2:33 PM EDT	Special Weather Statement	RLX	Lincoln	27 min
Aug 11, 3:00 PM EDT	Special Weather Statement	RLX	Lincoln, Wayne	30 min
Aug 11, 6:28 PM EDT	Special Weather Statement	RLX	Pleasants	32 min
Aug 11, 6:54 PM EDT	Special Weather Statement	RLX	Pleasants	36 min
Aug 11, 7:29 PM EDT	Special Weather Statement	RLX	Tyler	31 min

Nearby

Flash Flood Warnings in West Virginia, 2021 Every 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.