Alert archive / West Virginia / Flash Flood Warnings in 2021
Flash Flood Warning 81, NWS Charleston, WV
NWS Charleston, WV issued this flash flood warning at Aug 11, 2021, 9:57 AM EDT for 4 counties in West Virginia. It was in force for 3 hr. 1 report 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, 9:57 AM EDT (13:57 UTC)
- Expired
- Aug 11, 2021, 1:00 PM EDT
- In force
- 3 hr
- Issued by
- NWS Charleston, WV
- Area
- Storm-based polygon
- Flood severity
- None
Counties Boone County, WV, Logan County, WV, Raleigh County, WV, Wyoming County, WV
The radar
The Charleston,WV radar (KRLX), 52 km from the middle of the area, began a volume at 13:56 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, 12:20 PM EDT | HEAVY RAIN 2.4 | Ne Kopperston, WV | IVY KNOB IFLOWS GAGE MEASURED 2.40 INCHES OF RAIN 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, 2.0 hours before the alert went out and 201 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
- 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
The text
As transmitted.
160
WGUS51 KRLX 111357
FFWRLX
WVC005-045-081-109-111700-
/O.NEW.KRLX.FF.W.0081.210811T1357Z-210811T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Charleston WV
957 AM EDT Wed Aug 11 2021
The National Weather Service in Charleston has issued a
* Flash Flood Warning for...
Southeastern Boone County in central West Virginia...
Northwestern Raleigh County in southeastern West Virginia...
Eastern Logan County in southern West Virginia...
North Central Wyoming County in southern West Virginia...
* Until 100 PM EDT.
* At 957 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 inches 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...
Bald Knob, Wharton, Van, Amherstdale-Robinette, Stickney,
Kopperston and Naoma.
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 3783 8174 3797 8173 3792 8157 3797 8153
3786 8144 3772 8149 3774 8169 3781 8173
FLASH FLOOD...RADAR INDICATED
$$
JLB1 follow-up statement
356
WGUS71 KRLX 111653
FFSRLX
Flash Flood Statement
National Weather Service Charleston WV
1253 PM EDT Wed Aug 11 2021
WVC005-045-081-109-111703-
/O.EXP.KRLX.FF.W.0081.000000T0000Z-210811T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Boone WV-Logan WV-Raleigh WV-Wyoming WV-
1253 PM EDT Wed Aug 11 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 1 PM EDT THIS AFTERNOON FOR
SOUTHEASTERN BOONE, NORTHWESTERN RALEIGH, EASTERN LOGAN AND NORTH
CENTRAL WYOMING COUNTIES...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed any road closures.
LAT...LON 3783 8174 3797 8173 3792 8157 3797 8153
3786 8144 3772 8149 3774 8169 3781 8173
$$
JLBThe 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, 8:51 AM EDT | Flash Flood Warning | RLX | Boone, Kanawha | 5 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, 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.