Alert archive / Virginia / Flash Flood Warnings in 2011

Flash Flood Warning 5, NWS Blacksburg, VA

April 16, 2011Alleghany County, Ashe County, Wilkes County, North Carolina; 5 counties in Virginia

NWS Blacksburg, VA issued this flash flood warning at Apr 16, 2011, 9:35 AM EDT for Alleghany County, Ashe County, Wilkes County, North Carolina; 5 counties in Virginia. It was in force for 5 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, 9:35 AM EDT (13:35 UTC)
Expired
Apr 16, 2011, 3:04 PM EDT
In force
5 hr
Issued by
NWS Blacksburg, VA
Area
Storm-based polygon
Flood severity
None

Counties Alleghany County, NC, Ashe County, NC, Wilkes County, NC, Carroll County, VA, City of Galax, VA, Floyd County, VA, Grayson County, VA, Patrick County, VA

The radar

The Roanoke radar (KFCX), 87 km from the middle of the area, began a volume at 13:37 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
Apr 16, 12:00 PM EDTFLASH FLOOD3 Nnw Cana, VAFLOODING ON COAL CREEK ROAD
Apr 16, 12:15 PM EDTFLASH FLOOD4 Nne Gladesboro, VABIG REED ISLAND CREEK FLOODED CREEKSIDE ROAD
Apr 16, 12:15 PM EDTFLASH FLOOD6 Nnw Cana, VAMUD SLIDE ON HWY 52 NEAR FANCY GAP
Apr 16, 1:10 PM EDTFLASH FLOOD3 Ssw Floyd, VAWATER COVERING ROUTE 8 BETWEEN FLOYD AND THE BLUE RIDGE PARKWAY.
Apr 16, 1:15 PM EDTFLASH FLOODFloyd, VAFLOODING OF NUMEROUS STREETS COUNTY WIDE.
Apr 16, 1:35 PM EDTFLASH FLOOD4 E Lansing, NCNORTH FORK NEW RIVER OUT OF ITS BANKS AND FLOODING MOUTH OF SILAS CREEK ROAD.
Apr 16, 1:35 PM EDTFLASH FLOODBaldwin, NCMUDSLIDE. RADIO HILL RT 88
Apr 16, 2:00 PM EDTFLASH FLOOD3 Se Fries, VACHESTNUT CREEK WAS FLOODING CREEKVIEW DRIVE.

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

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 1.6 hours before the alert went out and 118 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, Greensboro/Hi Pt, NC at 12:00Z on 2011-04-16Temperature 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, Greensboro/Hi Pt, NC at 12:00Z on 2011-04-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 605 square meters per square second.19395878Sfc1 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
516 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
605 m²/s²
0-3 km storm-relative helicity
909 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.

688 
WGUS51 KRNK 161335
FFWRNK
NCC005-009-193-VAC035-063-077-141-640-161915-
/O.NEW.KRNK.FF.W.0005.110416T1335Z-110416T1915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  ALLEGHANY COUNTY IN NORTHWEST NORTH CAROLINA
  ASHE COUNTY IN NORTHWEST NORTH CAROLINA
  NORTHWESTERN WILKES COUNTY IN NORTHWEST NORTH CAROLINA
  NORTHWESTERN PATRICK COUNTY IN SOUTHWEST VIRGINIA
  CITY OF GALAX IN SOUTHWEST VIRGINIA
  SOUTHEASTERN GRAYSON COUNTY IN SOUTHWEST VIRGINIA
  SOUTHERN FLOYD COUNTY IN SOUTHWEST VIRGINIA
  CARROLL COUNTY IN SOUTHWEST VIRGINIA

* UNTIL 315 PM EDT.

* AT 918 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  HEAVIER RAINS MOVING NORTH ALONG AND EITHER SIDE OF THE BLUE       
  RIDGE. TWO TO AS MUCH AS FOUR INCHES OF RAIN HAS FALLEN SINCE      
  MIDNIGHT ACROSS THE AREA...ESPECIALLY CLOSER TO THE BLUE RIDGE.    
  HIGHER RATES OF RAINFALL CAN BE EXPECTED WITH SOME OF THESE        
  SHOWERS THROUGH LATE MORNING...WITH AN ADDITIONAL 1 TO 2 INCHES    
  POSSIBLE.

* LOCATIONS THAT WILL BE AFFECTED INCLUDE...JEFFERSON...GLENDALE
  SPRINGS...PINEY CREEK...GALAX...PIPERS GAP...CANA...AND STUART.
  
FOLKS WHO LIVE ALONG THE FOLLOWING RIVERS AND CREEKS WILL NEED
TO BE ALERT TO FLOODING...MULBERRY CREEK...PORTIONS OF THE NEW
RIVER AND ITS TRIBUTARIES IN ASHE AND ALLEGHANY COUNTIES...CHESTNUT 
CREEK IN GALAX...LOVILLS CREEK IN CARROLL COUNTY...AND MEADOW CREEK 
IN FLOYD COUNTY.

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.

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

THE HEAVY RAIN COULD ALSO CAUSE ROCK AND MUDSLIDES IN STEEPER 
TERRAIN.

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 3643 8170 3646 8157 3662 8125 3696 8032
      3682 8020 3663 8048 3655 8093 3623 8145

$$
2 follow-up statements
715 
WGUS71 KRNK 161609
FFSRNK

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
1209 PM EDT SAT APR 16 2011

NCC005-009-193-VAC035-063-077-141-640-161915-
/O.CON.KRNK.FF.W.0005.000000T0000Z-110416T1915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ALLEGHANY NC-ASHE NC-WILKES NC-PATRICK VA-CITY OF GALAX VA-GRAYSON 
VA-FLOYD VA-CARROLL VA-
1209 PM EDT SAT APR 16 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 315 PM EDT FOR THE
CITY OF GALAX... CARROLL...SOUTHERN FLOYD...SOUTHEASTERN GRAYSON...
NORTHWESTERN PATRICK...NORTHWESTERN WILKES...ASHE AND ALLEGHANY
COUNTIES...

AT 1157 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE HEAVY RAINFALL CAPABLE OF PRODUCING FLASH FLOODING OVER 
PARTS OF THE WARNED AREA. A VERY STRONG STORM OVER SOUTHEAST CARROLL 
COUNTY AT THIS TIME IS PRODUCING VERY HEAVY RAINFALL.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO GROUNDHOG
MOUNTAIN...ROCKY KNOB RECREATION AREA...ROCKY KNOB SUMMIT...MABRY
MILL...WILLIS...FLOYD...WOODLAWN...PIPERS GAP...LAUREL FORK...
HILLSVILLE...GLADESBORO...FANCY GAP...DUGSPUR...GALAX HILLSVILLE
AIRPORT...WOOLWINE...MEADOWS OF DAN...CHARITY...INDEPENDENCE...
FRIES...BRIDLE CREEK...BAYWOOD AND GALAX CITY

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 3643 8170 3646 8157 3662 8125 3696 8032
      3682 8020 3663 8048 3655 8093 3623 8145

$$

PC
500 
WGUS71 KRNK 161904
FFSRNK

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

NCC005-009-193-VAC035-063-077-141-640-161911-
/O.CAN.KRNK.FF.W.0005.000000T0000Z-110416T1915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ALLEGHANY NC-ASHE NC-WILKES NC-PATRICK VA-CITY OF GALAX VA-GRAYSON 
VA-FLOYD VA-CARROLL VA-
304 PM EDT SAT APR 16 2011

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR THE CITY OF
GALAX... CARROLL...SOUTHERN FLOYD...SOUTHEASTERN GRAYSON...
NORTHWESTERN PATRICK...NORTHWESTERN WILKES...ASHE AND ALLEGHANY
COUNTIES...

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

LAT...LON 3643 8170 3646 8157 3662 8125 3696 8032
      3682 8020 3663 8048 3655 8093 3623 8145

$$

PC

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 16, 5:13 AM EDTFlash Flood WarningRNKWatauga9 hr
Apr 16, 9:58 AM EDTSpecial Weather StatementRNKAshe32 min
Apr 16, 11:38 AM EDTSpecial Weather StatementRNKSurry67 min
Apr 16, 1:51 PM EDTSevere Thunderstorm WarningRNKCaswell, Rockingham69 min
Apr 16, 1:57 PM EDTTornado WarningRNKCaswell, Rockingham48 min
Apr 16, 2:10 PM EDTTornado WarningRNKCaswell35 min
Apr 16, 2:22 PM EDTAreal Flood AdvisoryRNKCaswell3 hr
Apr 16, 11:27 AM EDTSpecial Weather StatementRNKAlleghany, Bath, Botetourt, Carroll, Craig, Floyd and 8 more63 min
Apr 16, 12:10 PM EDTSevere Thunderstorm WarningRNKCarroll, Floyd, Franklin, Montgomery, Roanoke, City of Roanoke and 1 more65 min
Apr 16, 12:16 PM EDTSevere Thunderstorm WarningRNKAlleghany, Bath, Botetourt, Craig, Montgomery, Roanoke and 1 more59 min
Apr 16, 12:24 PM EDTFlash Flood WarningRNKAlleghany, Botetourt, Craig, Montgomery, Roanoke, City of Covington and 2 more4 hr
Apr 16, 1:04 PM EDTFlash Flood WarningRNKBedford, Floyd, Franklin, Patrick, Roanoke3 hr
Apr 16, 1:06 PM EDTSevere Thunderstorm WarningRNKAlleghany, Bath, Bedford, Botetourt, Rockbridge, City of Buena Vista and 1 more54 min
Apr 16, 1:26 PM EDTFlash Flood WarningRNKAmherst, Bedford, Botetourt, Campbell, Rockbridge, City of Buena Vista and 2 more6 hr
Apr 16, 1:43 PM EDTTornado WarningRNKAmherst, Bedford, Rockbridge47 min
Apr 16, 1:43 PM EDTTornado WarningRNKAmherst, Rockbridge, City of Buena Vista, City of Lexington32 min
Apr 16, 2:23 PM EDTSpecial Weather StatementRNKBath37 min
Apr 16, 2:25 PM EDTSevere Thunderstorm WarningRNKAmherst, Bedford, Campbell, City of Lynchburg35 min
Apr 16, 2:34 PM EDTSevere Thunderstorm WarningRNKAppomattox, Buckingham, Campbell, Charlotte, Halifax, Pittsylvania71 min
Apr 16, 2:45 PM EDTTornado WarningRNKCharlotte, Halifax45 min
Apr 16, 2:56 PM EDTTornado WarningRNKCharlotte, Halifax37 min
Apr 16, 3:04 PM EDTSevere Thunderstorm WarningRNKAmherst, Appomattox, Buckingham26 min

Nearby

Flash Flood Warnings in Virginia, 2011Flash Flood Warnings in North Carolina, 2011Every 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.