Alert archive / North Carolina / Flash Flood Warnings in 2012

Flash Flood Warning 10, NWS Blacksburg, VA

March 24, 2012Surry County, North Carolina

NWS Blacksburg, VA issued this flash flood warning at Mar 24, 2012, 6:05 PM EDT for Surry 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
Mar 24, 2012, 6:05 PM EDT (22:05 UTC)
Expired
Mar 24, 2012, 10:00 PM EDT
In force
4 hr
Issued by
NWS Blacksburg, VA
Area
Storm-based polygon
Flood severity
None

County Surry County, NC

The radar

The Roanoke radar (KFCX), 72 km from the middle of the area, began a volume at 22:08 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, 10.1 hours before the alert went out and 79 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 2012-03-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 226 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 12:00Z on 2012-03-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 167 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
226 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
526 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
167 m²/s²
0-3 km storm-relative helicity
153 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.5

Open this sounding in Storm Lab

The text

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

025 
WGUS51 KRNK 242205
FFWRNK
NCC171-250400-
/O.NEW.KRNK.FF.W.0010.120324T2205Z-120325T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
605 PM EDT SAT MAR 24 2012

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

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

* UNTIL MIDNIGHT EDT.

* AT 558 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  VERY HEAVY RAIN FROM A THUNDERSTORMS OVER THE WARNED AREA. RADAR 
  ESTIMATES THAT UP TO 2 TO 3 INCHES OF RAIN HAVE FALLEN ALONG THE 
  RIDGE...AND RUNOFF FROM THESE STORMS IS LIKELY TO CAUSE FLASH
  FLOODING ALONG LOVILLS CREEK AND SMALLER STREAMS AND CREEKS FROM
  THE MOUNT AIRY AREA...SOUTHWEST TOWARD DOBSON.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  WOODVILLE...TOAST...MOUNTAIN PARK...MOUNT AIRY...FLAT ROCK...
  DOBSON...ARARAT AND WHITE PLAINS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

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 3637 8089 3643 8079 3656 8061 3655 8046
      3655 8044 3654 8044 3634 8057 3633 8079

$$

WP
2 follow-up statements
828 
WGUS71 KRNK 250016
FFSRNK

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
816 PM EDT SAT MAR 24 2012

NCC171-250400-
/O.CON.KRNK.FF.W.0010.000000T0000Z-120325T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SURRY NC-
816 PM EDT SAT MAR 24 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL MIDNIGHT EDT FOR
NORTHEASTERN SURRY COUNTY...

AT 813 PM EDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED THAT 
LOVILLS CREEK WAS NEAR BANKFULL IN THE MOUNT AIRY AREA. HEAVIER RAIN 
HAVE ENDED...BUT RUNOFF FROM THE STORMS EARLIER WILL KEEP FLOODING 
GOING THIS EVENING ACROSS NORTHEASTERN SURRY COUNTY...ESPECIALLY 
ALONG LOVILLS CREEK.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WOODVILLE...
TOAST...MOUNT AIRY AND FLAT ROCK

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. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

&&

LAT...LON 3634 8077 3640 8076 3656 8061 3656 8057
      3655 8057 3655 8044 3654 8044 3634 8057

$$

WP
218 
WGUS71 KRNK 250200
FFSRNK

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
1000 PM EDT SAT MAR 24 2012

NCC171-250209-
/O.CAN.KRNK.FF.W.0010.000000T0000Z-120325T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SURRY NC-
1000 PM EDT SAT MAR 24 2012

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR NORTHEASTERN SURRY
COUNTY...

NO FLASH FLOODING HAS BEEN REPORTED...AND TORRENTIAL RAINS ARE 
OVER...THEREFORE THE FLASH FLOOD WARNING HAS BEEN CANCELLED. A FLOOD 
ADVISORY WILL BE ISSUED TO COVER ANY SMALL STREAMS AND CREEKS...SUCH 
AS LOVILLS CREEK THAT WILL BE RISING TO NEAR BANKFULL THROUGH THE 
NIGHT.

LAT...LON 3634 8077 3640 8076 3656 8061 3656 8057
      3655 8057 3655 8044 3654 8044 3634 8057

$$

WP

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 24, 12:24 PM EDTSpecial Weather StatementRNKAlleghany51 min
Mar 24, 12:43 PM EDTSpecial Weather StatementRNKWilkes47 min
Mar 24, 12:48 PM EDTSpecial Weather StatementRNKStokes42 min
Mar 24, 1:30 PM EDTSevere Thunderstorm WarningRNKAshe60 min
Mar 24, 2:00 PM EDTSevere Thunderstorm WarningRNKAlleghany, Surry60 min
Mar 24, 2:34 PM EDTSevere Thunderstorm WarningRNKAlleghany, Ashe56 min
Mar 24, 2:34 PM EDTSevere Thunderstorm WarningRNKAlleghany, Surry, Wilkes56 min
Mar 24, 2:44 PM EDTSevere Thunderstorm WarningRNKSurry61 min
Mar 24, 2:52 PM EDTFlash Flood WarningRNKSurry6 hr
Mar 24, 3:26 PM EDTSevere Thunderstorm WarningRNKAlleghany, Surry64 min
Mar 24, 4:08 PM EDTSevere Thunderstorm WarningRNKStokes, Surry, Wilkes, Yadkin67 min
Mar 24, 4:31 PM EDTSevere Thunderstorm WarningRNKStokes, Surry, Yadkin44 min
Mar 24, 5:35 PM EDTSevere Thunderstorm WarningRNKSurry55 min
Mar 24, 6:07 PM EDTSevere Thunderstorm WarningRNKStokes53 min
Mar 24, 6:16 PM EDTSpecial Weather StatementRNKAlleghany29 min
Mar 24, 6:45 PM EDTSevere Thunderstorm WarningRNKCaswell, Rockingham60 min
Mar 24, 7:39 PM EDTSevere Thunderstorm WarningRNKCaswell81 min

Nearby

Flash Flood Warnings in North Carolina, 2012Every flash flood warning in 2012

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.