Alert archive / North Carolina / Flash Flood Warnings in 2011

Flash Flood Warning 50, NWS Blacksburg, VA

July 5, 2011Ashe County, North Carolina

NWS Blacksburg, VA issued this flash flood warning at Jul 5, 2011, 5:42 PM EDT for Ashe County, North Carolina. It was in force for 108 min. 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
Jul 5, 2011, 5:42 PM EDT (21:42 UTC)
Expired
Jul 5, 2011, 7:30 PM EDT
In force
108 min
Issued by
NWS Blacksburg, VA
Area
Storm-based polygon
Flood severity
None

County Ashe County, NC

The radar

The Roanoke radar (KFCX), 118 km from the middle of the area, began a volume at 21:45 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
Jul 5, 6:03 PM EDTFLASH FLOOD2 Nw Jefferson, NCCLAYBANK CREEK CAME OUT OF ITS BANKS.

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, 9.7 hours before the alert went out and 143 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 2011-07-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 16 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 2011-07-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 24 square meters per square second.1939Sfc1 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
16 J/kg
Mixed-layer CIN
-250 J/kg
Mixed-layer LCL
907 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
24 m²/s²
0-3 km storm-relative helicity
43 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.

660 
WGUS51 KRNK 052142
FFWRNK
NCC009-060345-
/O.NEW.KRNK.FF.W.0050.110705T2142Z-110706T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
542 PM EDT TUE JUL 5 2011

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

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

* UNTIL 1145 PM EDT.

* AT 536 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  VERY HEAVY RAIN FROM A STATIONARY THUNDERSTORM OVER THE WARNED     
  AREA.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SHATLEY
  SPRINGS...LANSING AND CLIFTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ADDITIONAL RAINFALL AMOUNTS OF 1 TO 3 INCHES ARE POSSIBLE IN THE 
WARNED AREA. SOME SPOTS HAVE ALREADY RECEIVED 1 TO 2 INCHES TODAY.
THE HEAVIEST RAIN IS CURRENTLY NEAR BUFFALO CREEK WHICH IN THE 
PAST...HAS FLOODED THE INTERSECTIONS OF STATE ROUTE 1125 AND 1133.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL 
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.

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 3650 8160 3657 8135 3656 8134 3654 8135
      3652 8133 3648 8132 3647 8130 3641 8126
      3630 8146 3637 8164

$$
2 follow-up statements
163 
WGUS71 KRNK 052232
FFSRNK

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
632 PM EDT TUE JUL 5 2011

NCC009-060345-
/O.CON.KRNK.FF.W.0050.000000T0000Z-110706T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ASHE NC-
632 PM EDT TUE JUL 5 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1145 PM EDT FOR ASHE
COUNTY...

AT 627 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
VERY HEAVY RAIN HAD FALLEN OVER THE WARNED AREA. ESPECIALLY NEAR 
WEST JEFFERSON WHERE 2 TO 3 INCHES HAS FALLEN WITHIN THE PAST FEW 
HOURS. 

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SHATLEY
SPRINGS AND LANSING

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.

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 3650 8160 3657 8135 3656 8134 3654 8135
      3652 8133 3648 8132 3647 8130 3641 8126
      3630 8146 3637 8164

$$
673 
WGUS71 KRNK 052330
FFSRNK

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
730 PM EDT TUE JUL 5 2011

NCC009-052341-
/O.CAN.KRNK.FF.W.0050.000000T0000Z-110706T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ASHE NC-
730 PM EDT TUE JUL 5 2011

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR ASHE COUNTY...

HEAVY RAIN HAS ENDED OVER THE WARNED AREA...THUS THE FLASH FLOOD 
WARNING HAS BEEN CANCELLED.

LAT...LON 3650 8160 3657 8135 3656 8134 3654 8135
      3652 8133 3648 8132 3647 8130 3641 8126
      3630 8146 3637 8164

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 5, 3:38 AM EDTDense Fog AdvisoryRNKAlleghany, Ashe, Caswell, Rockingham, Stokes, Surry and 3 more5 hr
Jul 5, 3:02 PM EDTSpecial Weather StatementRNKAlleghany28 min
Jul 5, 5:28 PM EDTSpecial Weather StatementRNKAshe32 min
Jul 5, 6:28 PM EDTSpecial Weather StatementRNKSurry32 min
Jul 5, 6:40 PM EDTSevere Thunderstorm WarningRNKSurry29 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.