Alert archive / North Carolina / Flash Flood Warnings in 2011

Flash Flood Warning 63, NWS Blacksburg, VA

August 13, 2011Yadkin County, North Carolina

NWS Blacksburg, VA issued this flash flood warning at Aug 13, 2011, 8:57 PM EDT for Yadkin County, North Carolina. It was in force for 3 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
Aug 13, 2011, 8:57 PM EDT (00:57 UTC)
Expired
Aug 13, 2011, 11:56 PM EDT
In force
3 hr
Issued by
NWS Blacksburg, VA
Area
Storm-based polygon
Flood severity
None

County Yadkin County, NC

The radar

The Roanoke radar (KFCX), 101 km from the middle of the area, began a volume at 00:56 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
Aug 13, 10:15 PM EDTFLASH FLOOD3 Ene Shacktown, NCFOURBUSH CREEK OUT OF ITS BANKS AT 3709 JASPER ROAD. SEVERAL BASEMENTS OF LOCAL HOMES FLOODED. MEASURED 5.13 INCHES OF RAIN FOR THE EVENT.

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 00:00Z, 1.0 hours before the alert went out and 60 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 00:00Z on 2011-08-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1747 joules per kilogram.LCLLFCEL10008507005003002001001 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 00:00Z on 2011-08-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 39 square meters per square second.193958Sfc1 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
1747 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
718 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
39 m²/s²
0-3 km storm-relative helicity
37 m²/s²
Significant tornado parameter
0.3
Supercell composite
1.5

Open this sounding in Storm Lab

The text

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

282 
WGUS51 KRNK 140057
FFWRNK
NCC197-140700-
/O.NEW.KRNK.FF.W.0063.110814T0057Z-110814T0700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
857 PM EDT SAT AUG 13 2011

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EASTERN YADKIN COUNTY IN NORTHWEST NORTH CAROLINA

* UNTIL 300 AM EDT SUNDAY.

* AT 852 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 NEBO...ENON
  AND EAST BEND.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

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 3614 8067 3620 8075 3623 8073 3623 8044
      3613 8043 3611 8046 3611 8049 3608 8051
      3608 8052

$$

DS
2 follow-up statements
542 
WGUS71 KRNK 140156
FFSRNK

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
956 PM EDT SAT AUG 13 2011

NCC197-140700-
/O.CON.KRNK.FF.W.0063.000000T0000Z-110814T0700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
YADKIN NC-
956 PM EDT SAT AUG 13 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 300 AM EDT FOR
EASTERN YADKIN COUNTY...

AT 952 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE SHOWERS PRODUCING VERY HEAVY RAIN OVER THE WARNED AREA. 
BASINS OF GREATEST CONCERN FOR FLASH FLOODING INCLUDE LITTLE DEEP 
CREEK...LITTLE ELKIN CREEK...AND LOGAN CREEK.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ENON...NEBO
AND EAST BEND

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

&&

LAT...LON 3614 8067 3620 8075 3623 8073 3623 8044
      3613 8043 3611 8046 3611 8049 3608 8051
      3608 8052

$$

DS
987 
WGUS71 KRNK 140356
FFSRNK

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
1156 PM EDT SAT AUG 13 2011

NCC197-140407-
/O.CAN.KRNK.FF.W.0063.000000T0000Z-110814T0700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
YADKIN NC-
1156 PM EDT SAT AUG 13 2011

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR EASTERN YADKIN
COUNTY...

LAT...LON 3614 8067 3620 8075 3623 8073 3623 8044
      3613 8043 3611 8046 3611 8049 3608 8051
      3608 8052

$$

PH

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 13, 8:13 PM EDTFlash Flood WarningRNKSurry, Yadkin3 hr
Aug 13, 8:21 PM EDTSevere Thunderstorm WarningRNKYadkin54 min
Aug 13, 9:09 PM EDTSpecial Weather StatementRNKYadkin51 min
Aug 14, 1:21 AM EDTSpecial Weather StatementRNKAshe54 min
Aug 14, 4:14 PM EDTSevere Thunderstorm WarningRNKRockingham, Stokes61 min
Aug 14, 5:03 PM EDTSpecial Weather StatementRNKRockingham42 min
Aug 14, 5:36 PM EDTSpecial Weather StatementRNKCaswell, Rockingham54 min
Aug 14, 5:51 PM EDTSevere Thunderstorm WarningRNKStokes, Surry54 min
Aug 14, 6:43 PM EDTSpecial Weather StatementRNKStokes, Surry62 min
Aug 14, 7:28 PM EDTSpecial Weather StatementRNKYadkin62 min

Nearby

Flash 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.