Alert archive / Virginia / Flash Flood Warnings in 2011

Flash Flood Warning 7, NWS Blacksburg, VA

April 16, 20115 counties in Virginia

NWS Blacksburg, VA issued this flash flood warning at Apr 16, 2011, 1:04 PM EDT for 5 counties in Virginia. It was in force for 3 hr. 8 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: Apr 16, 2011, 1:04 PM EDT (17:04 UTC)
Expired: Apr 16, 2011, 4:23 PM EDT
In force: 3 hr
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Flood severity: None

Counties Bedford County, VA, Floyd County, VA, Franklin County, VA, Patrick County, VA, Roanoke County, VA

The radar

The Roanoke radar (KFCX), 23 km from the middle of the area, began a volume at 17:07 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
Apr 16, 1:34 PM EDT	FLASH FLOOD	3 Nw Rocky Mount, VA	GRASSY HILL ROAD WAS FLOODED BY THE BLACKWATER RIVER. WATER AND DEBRIS WERE RUNNING ACROSS THE ROAD.
Apr 16, 1:37 PM EDT	FLASH FLOOD	4 Se Boones Mill, VA	WATER IN ROADWAY UNDER OVERPASS AT 20430 VIRGIL H GOODE HIGHWAY.
Apr 16, 1:42 PM EDT	FLASH FLOOD	Nw Ferrum, VA	UP TO 2 FEET OF WATER IN THE ROAD AT THE INTERSECTION OF FRANKLIN STREET AND OLD FERRUM ROAD CAUSED BY FLOODING OF STORY CREEK.
Apr 16, 1:45 PM EDT	FLASH FLOOD	4 E Stewartsville, VA	FLOODING ALONG STEWARTSVILLE ROAD FROM BLOCK 24 TO 12300.
Apr 16, 1:48 PM EDT	FLASH FLOOD	5 Se Boones Mill, VA	WATER UNDER THE UNDERPASS ALONG WIRTZ ROAD.
Apr 16, 1:49 PM EDT	FLASH FLOOD	1 W Ferrum, VA	WATER OUT OF DITCH FLOODING THE INTERSECTION OF FRANKLIN STREET AND TURNERS CREEK ROAD.
Apr 16, 1:49 PM EDT	FLASH FLOOD	4 W Rocky Mount, VA	WATER IN THE ROAD AT 3081 COLES CREEK ROAD.
Apr 16, 2:00 PM EDT	FLASH FLOOD	5 E Stewartsville, VA	MUD AND DEBRIS IN THE ROAD FROM FLOODING ALONG SAUNDERS ROAD.

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, 5.1 hours before the alert went out and 49 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: 1 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 480 m above ground
0-6 km bulk shear: 76 kt
0-1 km storm-relative helicity: 747 m²/s²
0-3 km storm-relative helicity: 975 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.

756 
WGUS51 KRNK 161704
FFWRNK
VAC019-063-067-141-161-162300-
/O.NEW.KRNK.FF.W.0007.110416T1704Z-110416T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
104 PM EDT SAT APR 16 2011

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHEASTERN PATRICK COUNTY IN SOUTHWEST VIRGINIA
  SOUTHEASTERN ROANOKE COUNTY IN WEST CENTRAL VIRGINIA
  FRANKLIN COUNTY IN WEST CENTRAL VIRGINIA
  NORTHEASTERN FLOYD COUNTY IN SOUTHWEST VIRGINIA
  SOUTHWESTERN BEDFORD COUNTY IN SOUTH CENTRAL VIRGINIA

* UNTIL 700 PM EDT.

* AT 1253 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED  
  VERY HEAVY RAINS FROM THUNDERSTORMS OVER THE WARNED AREA.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ROANOKE
  MOUNTAIN...WESTERN SMITH MOUNTAIN LAKE...NORTHWEST SMITH MOUNTAIN
  LAKE...SMITH MOUNTAIN LAKE STATE PARK...STEWARTSVILLE...MONETA...
  GOODVIEW...CHAMBLISSBURG...BENT MOUNTAIN...WIRTZ...BURNT CHIMNEY...
  BOONES MILL...TERRYS FORK...COPPER HILL AND CHECK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ADDITIONAL RAINFALL AMOUNTS OF 1 TO 2 INCHES ARE POSSIBLE IN THE 
WARNED AREA.

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.

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 3702 8038 3702 8035 3708 8028 3711 8018
      3713 8017 3725 7985 3732 7986 3733 7982
      3726 7964 3706 7958 3684 7965 3681 7992
      3683 8000 3680 8001 3680 8020

$$

2 follow-up statements

220 
WGUS71 KRNK 161852
FFSRNK

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
252 PM EDT SAT APR 16 2011

VAC019-063-067-141-161-162300-
/O.CON.KRNK.FF.W.0007.000000T0000Z-110416T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PATRICK VA-ROANOKE VA-FRANKLIN VA-FLOYD VA-BEDFORD VA-
252 PM EDT SAT APR 16 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 700 PM EDT FOR
SOUTHWESTERN BEDFORD...NORTHEASTERN FLOYD...FRANKLIN...SOUTHEASTERN
ROANOKE AND NORTHEASTERN PATRICK COUNTIES...

AT 242 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THAT THE HEAVY RAINS HAVE ENDED ACROSS MOST OF THE WARNED AREA. 
RADAR AND RAIN GAGE ESTIMATES SHOWED THAT 2 TO 3 INCHES HAD
FALLEN IN A FEW HOURS OVER PARTS OF WESTERN FRANKLIN COUNTY. RUNOFF 
FROM THIS RAIN WILL CONTINUE FOR A FEW MORE HOURS AND STREAMS MAY
CONTINUE TO RISE DURING THAT TIME.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ROANOKE
MOUNTAIN...NORTHWEST SMITH MOUNTAIN LAKE...STEWARTSVILLE...MONETA...
GOODVIEW...CHAMBLISSBURG...WIRTZ...BURNT CHIMNEY...BOONES MILL...
TERRYS FORK...COPPER HILL AND CHECK

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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM EDT SATURDAY EVENING
FOR NORTHWESTERN NORTH CAROLINA AND SOUTHWESTERN VIRGINIA.

&&

LAT...LON 3680 8020 3702 8038 3702 8035 3708 8028
      3711 8018 3713 8017 3725 7986 3733 7982
      3726 7964 3706 7958 3684 7966 3681 7990
      3683 8000 3680 8001

$$


PC

680 
WGUS71 KRNK 162023
FFSRNK

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
423 PM EDT SAT APR 16 2011

VAC019-063-067-141-161-162033-
/O.CAN.KRNK.FF.W.0007.000000T0000Z-110416T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PATRICK VA-ROANOKE VA-FRANKLIN VA-FLOYD VA-BEDFORD VA-
423 PM EDT SAT APR 16 2011

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR SOUTHWESTERN
BEDFORD...NORTHEASTERN FLOYD...FRANKLIN...SOUTHEASTERN ROANOKE AND
NORTHEASTERN PATRICK COUNTIES...

FLOODING HAS ENDED OVER THE WARNED AREA...THUS THE FLASH FLOOD
WARNING HAS BEEN CANCELLED.

LAT...LON 3680 8020 3702 8038 3702 8035 3708 8028
      3711 8018 3713 8017 3725 7986 3733 7982
      3726 7964 3706 7958 3684 7966 3681 7990
      3683 8000 3680 8001

$$

PC

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 16, 9:35 AM EDT	Flash Flood Warning	RNK	Carroll, Floyd, Grayson, Patrick, City of Galax	5 hr
Apr 16, 9:58 AM EDT	Special Weather Statement	RNK	Grayson, Wythe	32 min
Apr 16, 11:27 AM EDT	Special Weather Statement	RNK	Alleghany, Bath, Botetourt, Carroll, Craig, Floyd and 8 more	63 min
Apr 16, 12:10 PM EDT	Severe Thunderstorm Warning	RNK	Carroll, Floyd, Franklin, Montgomery, Roanoke, City of Roanoke and 1 more	65 min
Apr 16, 12:16 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Bath, Botetourt, Craig, Montgomery, Roanoke and 1 more	59 min
Apr 16, 12:24 PM EDT	Flash Flood Warning	RNK	Alleghany, Botetourt, Craig, Montgomery, Roanoke, City of Covington and 2 more	4 hr
Apr 16, 1:06 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Bath, Bedford, Botetourt, Rockbridge, City of Buena Vista and 1 more	54 min
Apr 16, 1:26 PM EDT	Flash Flood Warning	RNK	Amherst, Bedford, Botetourt, Campbell, Rockbridge, City of Buena Vista and 2 more	6 hr
Apr 16, 1:43 PM EDT	Tornado Warning	RNK	Amherst, Bedford, Rockbridge	47 min
Apr 16, 1:43 PM EDT	Tornado Warning	RNK	Amherst, Rockbridge, City of Buena Vista, City of Lexington	32 min
Apr 16, 1:51 PM EDT	Severe Thunderstorm Warning	RNK	Charlotte, Halifax, Pittsylvania, City of Danville	69 min
Apr 16, 1:57 PM EDT	Tornado Warning	RNK	Halifax, Pittsylvania	48 min
Apr 16, 2:22 PM EDT	Areal Flood Advisory	RNK	Halifax, Pittsylvania, City of Danville	3 hr
Apr 16, 2:23 PM EDT	Special Weather Statement	RNK	Bath	37 min
Apr 16, 2:25 PM EDT	Severe Thunderstorm Warning	RNK	Amherst, Bedford, Campbell, City of Lynchburg	35 min
Apr 16, 2:34 PM EDT	Severe Thunderstorm Warning	RNK	Appomattox, Buckingham, Campbell, Charlotte, Halifax, Pittsylvania	71 min
Apr 16, 2:45 PM EDT	Tornado Warning	RNK	Charlotte, Halifax	45 min
Apr 16, 2:56 PM EDT	Tornado Warning	RNK	Charlotte, Halifax	37 min
Apr 16, 3:04 PM EDT	Severe Thunderstorm Warning	RNK	Amherst, Appomattox, Buckingham	26 min

Nearby

Flash Flood Warnings in 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.