Alert archive / North Carolina / Flash Flood Warnings in 2012

Flash Flood Warning 17, NWS Blacksburg, VA

May 14, 2012Wilkes County, North Carolina

NWS Blacksburg, VA issued this flash flood warning at May 14, 2012, 5:21 PM EDT for Wilkes County, North Carolina. It was in force for 6 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 14, 2012, 5:21 PM EDT (21:21 UTC)
Expired: May 14, 2012, 11:15 PM EDT
In force: 6 hr
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Flood severity: None

County Wilkes County, NC

The radar

The Roanoke radar (KFCX), 136 km from the middle of the area, began a volume at 21:22 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 14, 6:05 PM EDT	FLASH FLOOD	3 W North Wilkesboro, NC	SIX TO EIGHT INCHES OF WATER FLOWING OVER A BRIDGE ON CONGO ROAD...AND ONE CAR WAS SWEPT OFF THE ROAD INTO A DITCH

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, 9.4 hours before the alert went out and 132 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: 26 J/kg
Mixed-layer CIN: -122 J/kg
Mixed-layer LCL: 713 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 100 m²/s²
0-3 km storm-relative helicity: 160 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.

331 
WGUS51 KRNK 142121
FFWRNK
NCC193-150315-
/O.NEW.KRNK.FF.W.0017.120514T2121Z-120515T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
521 PM EDT MON MAY 14 2012

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

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

* UNTIL 1115 PM EDT.

* AT 518 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN FROM THUNDERSTORMS OVER THE WARNED AREA.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO DARBY...
  WILKESBORO RESERVOIR...WILKESBORO...NORTH WILKESBORO...HALLS
  MILLS...ELKVILLE...CRICKET...BUCK...MULBERRY...MILLERS CREEK...
  MAPLE SPRINGS AND FAIRPLAINS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3610 8154 3612 8154 3614 8150 3618 8148
      3624 8142 3635 8124 3628 8116 3617 8108
      3613 8118 3610 8130 3606 8139

$$

DS

1 follow-up statement

081 
WGUS71 KRNK 150308
FFSRNK

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
1108 PM EDT MON MAY 14 2012

NCC193-150318-
/O.EXP.KRNK.FF.W.0017.000000T0000Z-120515T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WILKES NC-
1108 PM EDT MON MAY 14 2012

...THE FLASH FLOOD WARNING WILL EXPIRE AT 1115 PM EDT FOR WESTERN
WILKES COUNTY...

CREEKS AND STREAMS HAVE RECEDED THUS THE FLASH FLOOD WARNING WILL BE
ALLOWED TO EXPIRE.

LAT...LON 3610 8154 3612 8154 3614 8150 3618 8148
      3624 8142 3635 8124 3628 8116 3617 8108
      3613 8118 3610 8130 3606 8139

$$

JH

The office that day

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

Issued	Product	Office	Counties	Lasted
May 14, 4:30 PM EDT	Special Weather Statement	RNK	Yadkin	30 min
May 14, 4:38 PM EDT	Special Weather Statement	RNK	Watauga	37 min
May 14, 5:05 PM EDT	Special Weather Statement	RNK	Wilkes	25 min
May 14, 5:35 PM EDT	Severe Thunderstorm Warning	RNK	Wilkes	39 min
May 14, 5:53 PM EDT	Severe Thunderstorm Warning	RNK	Wilkes	34 min
May 14, 6:16 PM EDT	Severe Thunderstorm Warning	RNK	Wilkes, Yadkin	59 min
May 14, 6:20 PM EDT	Flash Flood Watch	RNK	Stokes, Surry, Wilkes, Yadkin	11 hr
May 14, 7:04 PM EDT	Flash Flood Warning	RNK	Yadkin	6 hr

Nearby

Flash Flood Warnings in North Carolina, 2012 Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.