Alert archive / West Virginia / Flash Flood Warnings in 2011

Flash Flood Warning 12, NWS Charleston, WV

May 12, 2011Braxton County, Gilmer County, Lewis County, West Virginia

NWS Charleston, WV issued this flash flood warning at May 12, 2011, 12:28 PM EDT for Braxton County, Gilmer County, Lewis County, West Virginia. It was in force for 2 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: May 12, 2011, 12:28 PM EDT (16:28 UTC)
Expired: May 12, 2011, 2:30 PM EDT
In force: 2 hr
Issued by: NWS Charleston, WV
Area: Storm-based polygon
Flood severity: None

Counties Braxton County, WV, Gilmer County, WV, Lewis County, WV

The radar

The Charleston,WV radar (KRLX), 131 km from the middle of the area, began a volume at 16:27 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
May 12, 12:50 PM EDT	FLASH FLOOD	9 Ssw Weston, WV	FLOODING ALONG GOOSEPEN RUN AND INDIAN FORK AND SAND FORK. COUNTY ROUTE 21 AND COUNTY ROUTE 17 FLOODED. MUDSLIDES
May 12, 1:24 PM EDT	FLOOD	Ireland, WV	STREAMS OVER ROADS OR BRIDGES. EVENT OCCURRED BETWEEN 109 PM 05/12/2011 AND 124 PM 05/12/2011

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

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 4.5 hours before the alert went out and 168 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1624 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 22 m²/s²
0-3 km storm-relative helicity: 44 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.

461 
WGUS51 KRLX 121628
FFWRLX
WVC007-021-041-121830-
/O.NEW.KRLX.FF.W.0012.110512T1628Z-110512T1830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CHARLESTON WV
1228 PM EDT THU MAY 12 2011

THE NATIONAL WEATHER SERVICE IN CHARLESTON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHEASTERN BRAXTON COUNTY IN WEST VIRGINIA...
  EAST CENTRAL GILMER COUNTY IN WEST VIRGINIA...
  LEWIS COUNTY IN WEST VIRGINIA...

* UNTIL 230 PM EDT

* AT 1223 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
FLASH FLOODING FROM THUNDERSTORMS OVER THE WARNED AREA.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO STONEWALL
  JACKSON LAKE STATE PARK

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.

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.

EXCESSIVE RAINFALL WILL CAUSE STREAM BANKS TO BECOME UNSTABLE.
UNSTABLE STREAM BANKS CAN FAIL OR BECOME SLIPPERY. PERSONS SHOULD
STAY AWAY FROM STREAM BANKS...SWIFT FLOWING WATER AND CULVERTS. STAY
AWAY OR BE SWEPT AWAY!

&&

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

LAT...LON 3894 8035 3893 8034 3889 8036 3888 8039
      3882 8040 3869 8048 3904 8075 3912 8062
      3895 8033

$$

21

1 follow-up statement

267 
WGUS71 KRLX 121822
FFSRLX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON WV
222 PM EDT THU MAY 12 2011

WVC007-021-041-121833-
/O.EXP.KRLX.FF.W.0012.000000T0000Z-110512T1830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LEWIS WV-GILMER WV-BRAXTON WV-
222 PM EDT THU MAY 12 2011

...THE FLASH FLOOD WARNING WILL EXPIRE AT 230 PM EDT FOR NORTHEASTERN
BRAXTON...EAST CENTRAL GILMER AND LEWIS 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 AND NO LONGER POSE A FLASH FLOOD THREAT.

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.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM EDT
THURSDAY EVENING FOR SOUTHEAST OHIO AND CENTRAL WEST VIRGINIA.

LAT...LON 3894 8035 3893 8034 3889 8036 3888 8039
      3882 8040 3869 8048 3904 8075 3912 8062
      3895 8033

$$

21

The office that day

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

Issued	Product	Office	Counties	Lasted
May 12, 8:31 AM EDT	Special Weather Statement	RLX	Braxton, Webster	29 min
May 12, 9:00 AM EDT	Severe Thunderstorm Warning	RLX	Braxton, Webster	60 min
May 12, 9:57 AM EDT	Special Weather Statement	RLX	Tyler	48 min
May 12, 10:04 AM EDT	Severe Thunderstorm Warning	RLX	Doddridge, Pleasants, Ritchie, Tyler	56 min
May 12, 10:21 AM EDT	Flash Flood Warning	RLX	Tyler	114 min
May 12, 10:54 AM EDT	Severe Thunderstorm Warning	RLX	Doddridge, Gilmer, Lewis, Ritchie, Tyler	66 min
May 12, 11:08 AM EDT	Special Weather Statement	RLX	Pocahontas, Webster	52 min
May 12, 11:46 AM EDT	Special Weather Statement	RLX	Doddridge, Gilmer, Lewis, Ritchie, Upshur, Webster	3 hr
May 12, 12:24 PM EDT	Severe Thunderstorm Warning	RLX	Braxton, Lewis, Randolph, Upshur, Webster	66 min
May 12, 12:39 PM EDT	Severe Thunderstorm Warning	RLX	Braxton, Calhoun, Gilmer	66 min
May 12, 12:44 PM EDT	Flash Flood Warning	RLX	Braxton, Pocahontas, Randolph, Upshur, Webster	3 hr
May 12, 1:36 PM EDT	Severe Thunderstorm Warning	RLX	Braxton, Calhoun, Clay, Nicholas, Roane, Webster	41 min
May 12, 4:40 PM EDT	Special Weather Statement	RLX	Wood	35 min

Nearby

Flash Flood Warnings in West Virginia, 2011 Every flash flood warning in 2011

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.