Alert archive / West Virginia / Flash Flood Warnings in 2012

Flash Flood Warning 34, NWS Charleston, WV

July 31, 2012Braxton County, Nicholas County, Webster County, West Virginia

NWS Charleston, WV issued this flash flood warning at Jul 31, 2012, 8:00 PM EDT for Braxton County, Nicholas County, Webster County, West Virginia. It was in force for 2 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
Jul 31, 2012, 8:00 PM EDT (00:00 UTC)
Expired
Jul 31, 2012, 10:00 PM EDT
In force
2 hr
Issued by
NWS Charleston, WV
Area
Storm-based polygon
Flood severity
None

Counties Braxton County, WV, Nicholas County, WV, Webster County, WV

The radar

The Charleston,WV radar (KRLX), 105 km from the middle of the area, began a volume at 00:01 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
Jul 31, 9:10 PM EDTFLASH FLOODErbacon, WV911 CENTER REPORTS THAT THE ERBACON FIRE DEPT. CALLED IN HIGH WATER OVER ROADS.

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 00:00Z, 0.0 hours before the alert went out and 163 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 00:00Z on 2012-08-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 944 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 00:00Z on 2012-08-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 45 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
944 J/kg
Mixed-layer CIN
-10 J/kg
Mixed-layer LCL
949 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
45 m²/s²
0-3 km storm-relative helicity
69 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.

115 
WGUS51 KRLX 010000
FFWRLX
WVC007-067-101-010200-
/O.NEW.KRLX.FF.W.0034.120801T0000Z-120801T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CHARLESTON WV
800 PM EDT TUE JUL 31 2012

THE NATIONAL WEATHER SERVICE IN CHARLESTON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTH CENTRAL BRAXTON COUNTY IN WEST VIRGINIA...
  NORTHEASTERN NICHOLAS COUNTY IN WEST VIRGINIA...
  WEBSTER COUNTY IN WEST VIRGINIA...
  THIS INCLUDES THE CITY OF WEBSTER SPRINGS...

* UNTIL 1000 PM EDT

* AT 752 PM EDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED VERY HEAVY
  RAIN FROM A THUNDERSTORM OVER THE WARNED AREA. FLOODING HAS BEEN   
  REPORTED IN WEBSTER SPRINGS...BOLAIR...AND CAMDEN ON THE GAULEY.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO BIRCH RIVER

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

&&

PLEASE REPORT HIGH WATER TO THE NATIONAL WEATHER SERVICE BY CALLING
TOLL FREE...877-633-6772...WHEN YOU CAN DO SO SAFELY.

LAT...LON 3845 8022 3840 8024 3834 8034 3834 8035
      3832 8035 3824 8048 3827 8064 3838 8092
      3843 8089 3848 8082 3850 8085 3854 8082
      3861 8058 3857 8021

$$

13
1 follow-up statement
225 
WGUS71 KRLX 010158
FFSRLX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON WV
958 PM EDT TUE JUL 31 2012

WVC007-067-101-010207-
/O.EXP.KRLX.FF.W.0034.000000T0000Z-120801T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NICHOLAS WV-BRAXTON WV-WEBSTER WV-
958 PM EDT TUE JUL 31 2012

...THE FLASH FLOOD WARNING WILL EXPIRE AT 1000 PM EDT FOR WEBSTER...
SOUTH CENTRAL BRAXTON AND NORTHEASTERN NICHOLAS COUNTIES...

HEAVY RAIN IS NO LONGER ANTICIPATED...THEREFORE THE FLASH FLOOD
WARNING THAT WAS IN EFFECT HAS BEEN ALLOWED TO EXPIRE. STREAMS AND 
CREEKS HAVE BEGUN TO RECEDE. LINGERING LIGHT RAINS WILL END BY 11 PM.

TURN AROUND DON'T DROWN. DO NOT DRIVE YOUR CAR ON FLOODED ROADWAYS.

PLEASE REPORT HIGH WATER TO THE NATIONAL WEATHER SERVICE BY CALLING
TOLL FREE 877-633-6772 WHEN YOU CAN DO SO SAFELY.

LAT...LON 3845 8022 3840 8024 3834 8034 3834 8035
      3832 8035 3824 8048 3827 8064 3838 8092
      3843 8089 3848 8082 3850 8085 3854 8082
      3861 8058 3857 8021

$$

05

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 1, 2:15 PM EDTSpecial Weather StatementRLXWirt60 min
Aug 1, 2:34 PM EDTSpecial Weather StatementRLXJackson26 min
Aug 1, 3:29 PM EDTSpecial Weather StatementRLXMingo61 min
Aug 1, 3:48 PM EDTSpecial Weather StatementRLXLogan57 min
Aug 1, 4:03 PM EDTSpecial Weather StatementRLXBoone42 min
Aug 1, 4:09 PM EDTSpecial Weather StatementRLXHarrison51 min
Aug 1, 5:40 PM EDTSpecial Weather StatementRLXClay, Kanawha65 min
Aug 1, 5:56 PM EDTSevere Thunderstorm WarningRLXClay, Fayette, Kanawha, Nicholas49 min
Aug 1, 6:15 PM EDTFlash Flood WarningRLXBarbour, Randolph, Upshur3 hr
Aug 1, 6:37 PM EDTFlash Flood WarningRLXKanawha113 min
Aug 1, 7:17 PM EDTSpecial Weather StatementRLXHarrison58 min

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.