Alert archive / North Carolina / Flash Flood Warnings in 2011

Flash Flood Warning 55, NWS Blacksburg, VA

July 13, 2011Wilkes County, North Carolina

NWS Blacksburg, VA issued this flash flood warning at Jul 13, 2011, 2:05 PM EDT for Wilkes County, North Carolina. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 13, 2011, 2:05 PM EDT (18:05 UTC)
Expired: Jul 13, 2011, 6:06 PM EDT
In force: 4 hr
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Flood severity: None

County Wilkes County, NC

The radar

The Roanoke radar (KFCX), 134 km from the middle of the area, began a volume at 18:06 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.

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 6.1 hours before the alert went out and 131 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: 1682 J/kg
Mixed-layer CIN: -64 J/kg
Mixed-layer LCL: 1022 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: -37 m²/s²
0-3 km storm-relative helicity: 8 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.6

Open this sounding in Storm Lab

The text

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

830 
WGUS51 KRNK 131805
FFWRNK
NCC193-140000-
/O.NEW.KRNK.FF.W.0055.110713T1805Z-110714T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
205 PM EDT WED JUL 13 2011

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WEST CENTRAL WILKES COUNTY IN NORTHWEST NORTH CAROLINA

* UNTIL 800 PM EDT.

* AT 155 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  VERY HEAVY RAIN FROM A NEARLY STATIONARY THUNDERSTORM OVER THE 
  WARNED AREA.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO MAPLE   
  SPRINGS. THE SOUTH PRONG OF LEWIS FORK IS LIKELY TO FLOOD.

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.

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 3623 8145 3625 8128 3621 8125 3610 8127
      3610 8141

$$

JJ

3 follow-up statements

480 
WGUS71 KRNK 131856
FFSRNK

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
256 PM EDT WED JUL 13 2011

NCC193-140000-
/O.CON.KRNK.FF.W.0055.000000T0000Z-110714T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WILKES NC-
256 PM EDT WED JUL 13 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 800 PM EDT FOR
WESTERN WILKES COUNTY...

AT 251 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THAT THE THUNDERSTORM WHICH WAS PRODUCING VERY HEAVY RAIN HAS 
FINALLY WEAKENED AND THE RAIN IS TAPERING OFF OVER THE WARNED AREA. 
HOWEVER...RADAR ESTIMATES THAT AROUND 3.5 INCHES OF RAIN FELL IN A 
LITTLE OVER AN HOUR. RUNOFF FROM THIS HEAVY RAIN WILL LIKELY CAUSE 
FLOODING ALONG CREEKS AND SMALL STREAMS. CREEKS MOST LIKELY TO FLOOD 
INCLUDE...THE SOUTH AND NORTH PRONGS OF LEWIS FORK...AND YATES 
CREEK. 

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO MAPLE 
SPRINGS. 

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 SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT
WEDNESDAY EVENING FOR NORTHWESTERN NORTH CAROLINA AND SOUTHWESTERN
VIRGINIA.

&&

LAT...LON 3623 8145 3625 8128 3621 8125 3610 8127
      3610 8141

$$

JJ

738 
WGUS71 KRNK 132031
FFSRNK

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
431 PM EDT WED JUL 13 2011

NCC193-140000-
/O.CON.KRNK.FF.W.0055.000000T0000Z-110714T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WILKES NC-
431 PM EDT WED JUL 13 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 800 PM EDT FOR
WESTERN WILKES COUNTY...

AT 421 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THAT RAINFALL HAD TAPERED OFF ACROSS THE WARNED AREA. SOME 
ADDITIONAL SHOWERS AND STORMS MAY DEVELOP ACROSS THE REGION EARLY 
THIS EVENING ALTHOUGH VERY HEAVY RAIN IS NOT EXPECTED. HOWEVER 
RUNOFF FROM EARLIER RAINFALL WHICH RADAR ESTIMATED AT MORE THAN 3 
INCHES...WILL LIKELY CAUSE SMALLER CREEKS AND STREAMS TO FLOOD 
AROUND THE MAPLE SPRINGS AREA SOUTHEAST TO NEAR THE WILKESBORO 
RESERVOIR.  

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO MAPLE 
SPRINGS.

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 SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT
WEDNESDAY EVENING FOR NORTHWESTERN NORTH CAROLINA AND SOUTHWESTERN
VIRGINIA.

&&

LAT...LON 3623 8145 3625 8128 3621 8125 3610 8127
      3610 8141

$$

JH

518 
WGUS71 KRNK 132206
FFSRNK

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
606 PM EDT WED JUL 13 2011

NCC193-132217-
/O.CAN.KRNK.FF.W.0055.000000T0000Z-110714T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WILKES NC-
606 PM EDT WED JUL 13 2011

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

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

LAT...LON 3623 8145 3625 8128 3621 8125 3610 8127
      3610 8141

$$

JH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 13, 1:32 PM EDT	Severe Thunderstorm Warning	RNK	Wilkes	58 min
Jul 13, 2:02 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Surry, Wilkes, Yadkin	58 min
Jul 13, 2:29 PM EDT	Severe Thunderstorm Warning	RNK	Ashe, Watauga, Wilkes	61 min
Jul 13, 2:57 PM EDT	Severe Thunderstorm Warning	RNK	Surry, Yadkin	47 min

Nearby

Flash Flood Warnings in North Carolina, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.