Alert archive / North Carolina / Flash Flood Warnings in 2011

Flash Flood Warning 19, NWS Blacksburg, VA

May 13, 2011Surry County, Yadkin County, North Carolina

NWS Blacksburg, VA issued this flash flood warning at May 13, 2011, 4:19 PM EDT for Surry County, Yadkin County, North Carolina. It was in force for 4 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: May 13, 2011, 4:19 PM EDT (20:19 UTC)
Expired: May 13, 2011, 8:15 PM EDT
In force: 4 hr
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Flood severity: None

Counties Surry County, NC, Yadkin County, NC

The radar

The Roanoke radar (KFCX), 82 km from the middle of the area, began a volume at 20:22 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 13, 5:15 PM EDT	FLASH FLOOD	2 Sse Dobson, NC	CODY CREEK OVERFLOWING OVER ROUTE 601

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, 8.3 hours before the alert went out and 86 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: 185 J/kg
Mixed-layer CIN: -88 J/kg
Mixed-layer LCL: 606 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 73 m²/s²
0-3 km storm-relative helicity: 64 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.

892 
WGUS51 KRNK 132019
FFWRNK
NCC171-197-140215-
/O.NEW.KRNK.FF.W.0019.110513T2019Z-110514T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
419 PM EDT FRI MAY 13 2011

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHEASTERN YADKIN COUNTY IN NORTHWEST NORTH CAROLINA
  SURRY COUNTY IN NORTH CENTRAL NORTH CAROLINA

* UNTIL 1015 PM EDT.

* AT 417 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN FROM A THUNDERSTORM OVER THE WARNED AREA.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO CUMBERLAND
  KNOB...WOODVILLE...WESTFIELD...TOAST...PINE RIDGE...MOUNT AIRY...
  LOW GAP...FLAT ROCK AND BOTTOM.

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.

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 3625 8087 3633 8087 3634 8088 3656 8091
      3656 8090 3656 8068 3655 8047 3626 8046

$$

KK

3 follow-up statements

595 
WGUS71 KRNK 132124
FFSRNK

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
524 PM EDT FRI MAY 13 2011

NCC171-197-140215-
/O.CON.KRNK.FF.W.0019.000000T0000Z-110514T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
YADKIN NC-SURRY NC-
524 PM EDT FRI MAY 13 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1015 PM EDT FOR
SURRY AND NORTHEASTERN YADKIN COUNTIES...

AT 517 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A THUNDERSTORM PRODUCING VERY HEAVY RAIN OVER THE WARNED 
AREA. THIS STORM WAS LOCATED NEAR ROCKFORD...OR 6 MILES NORTHEAST OF 
BOONVILLE...AND MOVING SOUTHEAST AT 20 MPH. RAINFALL RATES OF ONE TO 
THREE INCHES PER HOUR ARE POSSIBLE. WATCH FOR FLOODING NEAR 
WESTFIELD ALONG TOMS CREEK CHURCH RD. FLOODING IS ALSO POSSIBLE 
ALONG ARARAT RIVER NEAR TOWN OF ARARAT. I 

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO CUMBERLAND
KNOB...WOODVILLE...WESTFIELD...TOAST...PINE RIDGE...MOUNT AIRY...LOW
GAP...FLAT ROCK...BOTTOM AND WHITE PLAINS

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.

&&

LAT...LON 3625 8087 3633 8087 3634 8088 3656 8091
      3656 8090 3656 8068 3655 8047 3626 8046

$$

KK

562 
WGUS71 KRNK 132304
FFSRNK

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
704 PM EDT FRI MAY 13 2011

NCC171-197-140215-
/O.CON.KRNK.FF.W.0019.000000T0000Z-110514T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
YADKIN NC-SURRY NC-
704 PM EDT FRI MAY 13 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1015 PM EDT FOR
SURRY AND NORTHEASTERN YADKIN COUNTIES...

AT 659 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
MORE THUNDERSTORMS WITH HEAVY RAINFALL MOVING INTO THE WARNED AREA 
FROM THE WEST. RADAR ESTIMATES THESE STORMS COULD BRING AN 
ADDITIONAL ONE TO ONE AND A HALF INCHES OF RAIN IN 30 MINUTES. THIS 
ADDITIONAL HEAVY RAINFALL MAY CAUSE AREA CREEKS AND STREAMS TO 
FLOOD. IN ADDITION...BECAUSE OF THE HEAVY RATES AND SATURATED 
GROUND...ROCK AND MUDSLIDES ARE ALSO POSSIBLE. 

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO CUMBERLAND 
KNOB...WOODVILLE...WESTFIELD...TOAST...MOUNT AIRY...LOW GAP...LEVEL 
CROSS...FAIRVIEW...DOBSON...CRUTCHFIELD...BURCH...BOTTOM...ARARAT... 
WHITE PLAINS AND STATE ROAD.

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.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM EDT FRIDAY
EVENING FOR NORTHWEST NORTH CAROLINA AND SOUTHWEST VIRGINIA. A SEVERE
THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL 1100 PM EDT FRIDAY
EVENING FOR NORTHWESTERN NORTH CAROLINA AND SOUTHWESTERN VIRGINIA.

&&

LAT...LON 3625 8087 3633 8087 3634 8088 3656 8091
      3656 8090 3656 8068 3655 8047 3626 8046

$$

JJ

936 
WGUS71 KRNK 140015
FFSRNK

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
815 PM EDT FRI MAY 13 2011

NCC171-197-140022-
/O.CAN.KRNK.FF.W.0019.000000T0000Z-110514T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
YADKIN NC-SURRY NC-
815 PM EDT FRI MAY 13 2011

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR SURRY AND
NORTHEASTERN YADKIN COUNTIES...

ANY FLOODING HAS ENDED OVER THE WARNED AREA...THUS THE FLASH FLOOD 
WARNING HAS BEEN CANCELLED. ADDITIONAL RAINFALL UP TO AN INCH IS 
POSSIBLE TONIGHT WITH A THUNDERSTORM.

LAT...LON 3625 8087 3633 8087 3634 8088 3656 8091
      3656 8090 3656 8068 3655 8047 3626 8046

$$

KK

The office that day

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

Issued	Product	Office	Counties	Lasted
May 13, 3:01 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Surry, Wilkes	59 min
May 13, 3:16 PM EDT	Flash Flood Watch	RNK	Alleghany, Ashe	6 hr
May 13, 3:45 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Surry	60 min
May 13, 4:40 PM EDT	Severe Thunderstorm Warning	RNK	Stokes, Surry	50 min
May 13, 4:45 PM EDT	Severe Thunderstorm Warning	RNK	Ashe, Watauga, Wilkes	60 min
May 13, 5:15 PM EDT	Severe Thunderstorm Warning	RNK	Stokes, Surry, Yadkin	60 min
May 13, 5:30 PM EDT	Flash Flood Warning	RNK	Ashe	6 hr
May 13, 5:35 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Ashe, Watauga, Wilkes	55 min
May 13, 6:30 PM EDT	Severe Thunderstorm Warning	RNK	Stokes, Surry, Yadkin	37 min
May 13, 6:40 PM EDT	Special Weather Statement	RNK	Alleghany	65 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.