Alert archive / West Virginia / Flash Flood Warnings in 2012

Flash Flood Warning 26, NWS Blacksburg, VA

May 17, 2012Greenbrier County, West Virginia

NWS Blacksburg, VA issued this flash flood warning at May 17, 2012, 3:48 PM EDT for Greenbrier County, 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
May 17, 2012, 3:48 PM EDT (19:48 UTC)
Expired
May 17, 2012, 6:39 PM EDT
In force
3 hr
Issued by
NWS Blacksburg, VA
Area
Storm-based polygon
Flood severity
None

County Greenbrier County, WV

The radar

The Charleston,WV radar (KRLX), 103 km from the middle of the area, began a volume at 19:51 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

TimeReportWhereRemark
May 17, 4:40 PM EDTFLASH FLOOD5 S Rupert, WVCALLAHAN BRANCH OUT OF BANKS FLOODING METHODIST BRANCH RD

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, 7.8 hours before the alert went out and 129 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 2012-05-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2012-05-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -18 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1277 m above ground
0-6 km bulk shear
6 kt
0-1 km storm-relative helicity
-18 m²/s²
0-3 km storm-relative helicity
-9 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

253 
WGUS51 KRNK 171948
FFWRNK
WVC025-180145-
/O.NEW.KRNK.FF.W.0026.120517T1948Z-120518T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
348 PM EDT THU MAY 17 2012

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WEST CENTRAL GREENBRIER COUNTY IN SOUTHEAST WEST VIRGINIA

* UNTIL 945 PM EDT.

* AT 341 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN FROM A THUNDERSTORM OVER THE WARNED AREA.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO RUPERT AND
  MEADOW BLUFF.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.

PLEASE RELAY ANY REPORTS OF FLOODING INCLUDING MUDSLIDES...OR ROAD
CLOSURES TO THE NATIONAL WEATHER SERVICE IN BLACKSBURG BY CALLING
TOLL FREE...1...8 6 6...2 1 5...4 3 2 4. DELAYED REPORTS ARE WELCOME.

&&

LAT...LON 3795 8072 3801 8051 3783 8061 3783 8074

$$

JH
2 follow-up statements
689 
WGUS71 KRNK 172140
FFSRNK

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
540 PM EDT THU MAY 17 2012

WVC025-180145-
/O.CON.KRNK.FF.W.0026.000000T0000Z-120518T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
GREENBRIER WV-
540 PM EDT THU MAY 17 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 945 PM EDT FOR
WESTERN GREENBRIER COUNTY...

AT 532 PM EDT...SHOWERS AND THUNDERSTORMS HAD TAPERED OFF ACROSS THE 
WARNED AREA. HOWEVER RUNOFF FROM THE EARLIER HEAVY RAIN MAY STILL 
CAUSE SOME FLOODING BETWEEN SMOOT AND MEADOW BLUFF...PARTICULARLY 
NEAR INTERSTATE 64. METHODIST BRANCH ROAD WAS REPORTED FLOODED 
SHORTLY AFTER 430 PM. 

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO RUPERT AND 
SMOOT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.

&&

LAT...LON 3795 8072 3801 8051 3783 8061 3783 8074

$$

JH
972 
WGUS71 KRNK 172239
FFSRNK

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
639 PM EDT THU MAY 17 2012

WVC025-172247-
/O.CAN.KRNK.FF.W.0026.000000T0000Z-120518T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
GREENBRIER WV-
639 PM EDT THU MAY 17 2012

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR WESTERN GREENBRIER
COUNTY...

SHOWERS AND THUNDERSTORMS HAVE ENDED ACROSS THE AREA AND ONLY 
ISOLATED SHOWERS ARE EXPECTED THE REMAINDER OF THE EVENING. WATER 
LEVELS IN THE AREA OF EARLIER FLOODING SHOULD HAVE ALSO RECEDED SO 
THE WARNING HAS BEEN CANCELLED.

LAT...LON 3795 8072 3801 8051 3783 8061 3783 8074

$$

The office that day

Everything else NWS Blacksburg, VA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 17, 3:17 PM EDTSpecial Weather StatementRNKGreenbrier58 min
May 17, 5:33 PM EDTSpecial Weather StatementRNKMonroe27 min
May 17, 5:45 PM EDTSevere Thunderstorm WarningRNKMonroe45 min
May 17, 6:14 PM EDTAreal Flood AdvisoryRNKMonroe6 hr

Nearby

Flash Flood Warnings in West Virginia, 2012Every flash flood warning in 2012

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.