Alert archive / North Carolina / Flash Flood Warnings in 2011

Flash Flood Warning 85, NWS Blacksburg, VA

September 25, 2011Ashe County, North Carolina

NWS Blacksburg, VA issued this flash flood warning at Sep 25, 2011, 2:59 AM EDT for Ashe County, North Carolina. It was in force for 4 hr. 2 reports 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
Sep 25, 2011, 2:59 AM EDT (06:59 UTC)
Expired
Sep 25, 2011, 7:28 AM EDT
In force
4 hr
Issued by
NWS Blacksburg, VA
Area
Storm-based polygon
Flood severity
None

County Ashe County, NC

The radar

The Roanoke radar (KFCX), 127 km from the middle of the area, began a volume at 07:02 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
Sep 25, 3:57 AM EDTFLASH FLOODFleetwood, NCCRANBERRY CREEK FLOODED LIBERTY GROVE CHURCH ROAD. SEVERAL OTHER STREETS FLOODED IN FLEETWOOD AREA.
Sep 25, 4:00 AM EDTFLASH FLOOD1 Nne Todd, NCWATER FLOODING TODD RAILROAD GRADE ROAD. ADDITIONAL STREET FLOODED IN THE TOWN OF TODD.

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, 7.0 hours before the alert went out and 146 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 2011-09-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 367 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 2011-09-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 41 square meters per square second.1939587897Sfc1 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
367 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
666 m above ground
0-6 km bulk shear
58 kt
0-1 km storm-relative helicity
41 m²/s²
0-3 km storm-relative helicity
11 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.

457 
WGUS51 KRNK 250659
FFWRNK
NCC009-251300-
/O.NEW.KRNK.FF.W.0085.110925T0659Z-110925T1300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
259 AM EDT SUN SEP 25 2011

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

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

* UNTIL 900 AM EDT.

* AT 254 AM 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 MOUNT
  JEFFERSON...WEST JEFFERSON...WAGONER...TROUT...SHATLEY SPRINGS...
  NELLA...LANSING...JEFFERSON...GRASSY CREEK...FLATWOOD...CLIFTON...
  ASHLAND AND LAUREL SPRINGS.

WATCH FOR FLOODING ALONG OLD FIELDS CREEK NEAR BALDWIN AND 
FLEETWOOD...CALL CREEK AND THREE TOP CREEK NEAR TROUT.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

ADDITIONAL RAINFALL AMOUNTS OF ONE TO THREE INCHES ARE POSSIBLE IN 
THE WARNED AREA.

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 3647 8170 3657 8170 3658 8168 3657 8135
      3648 8132 3645 8127 3640 8126 3639 8124
      3636 8125 3637 8136 3629 8137 3629 8141
      3624 8148 3628 8157 3635 8164 3640 8175

$$

KK
2 follow-up statements
026 
WGUS71 KRNK 250739
FFSRNK

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
339 AM EDT SUN SEP 25 2011

NCC009-251300-
/O.CON.KRNK.FF.W.0085.000000T0000Z-110925T1300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ASHE NC-
339 AM EDT SUN SEP 25 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 900 AM EDT FOR ASHE
COUNTY...

AT 332 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE SHOWERS AND ISOLATED THUNDERSTORM PRODUCING VERY HEAVY RAIN OVER 
THE WARNED AREA.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO MOUNT
JEFFERSON...WEST JEFFERSON...WAGONER...TROUT...SHATLEY SPRINGS...
OTHELLO...NELLA...LANSING...JEFFERSON...GRASSY CREEK...GLENDALE
SPRINGS...FLATWOOD...CLIFTON...BALDWIN...ASHLAND AND LAUREL SPRINGS

WATCH FOR FLOODING ALONG THREE TOP CREEK NEAR CRESTON...BIG HORSE CREEK
NEAR LANSING AND OLD FIELDS CREEK NEAR BALDWIN AND FLEETWOOD. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ADDITIONAL RAINFALL AMOUNTS OF ONE TO THREE INCHES ARE POSSIBLE IN THE 
WARNED AREA.

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.

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 3647 8170 3657 8170 3658 8168 3657 8135
      3648 8132 3645 8127 3640 8126 3639 8124
      3636 8125 3637 8136 3629 8137 3629 8141
      3624 8148 3628 8157 3635 8164 3640 8175

$$

KK
836 
WGUS71 KRNK 251128
FFSRNK

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
728 AM EDT SUN SEP 25 2011

NCC009-251138-
/O.CAN.KRNK.FF.W.0085.000000T0000Z-110925T1300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ASHE NC-
728 AM EDT SUN SEP 25 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 3647 8170 3657 8170 3658 8168 3657 8135
      3648 8132 3645 8127 3640 8126 3639 8124
      3636 8125 3637 8136 3629 8137 3629 8141
      3624 8148 3628 8157 3635 8164 3640 8175

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 24, 9:47 PM EDTSpecial Weather StatementRNKWatauga118 min
Sep 24, 11:44 PM EDTSpecial Weather StatementRNKAshe, Watauga76 min
Sep 25, 1:00 AM EDTSpecial Weather StatementRNKAshe, Watauga60 min
Sep 25, 2:03 AM EDTFlash Flood WarningRNKWatauga5 hr
Sep 25, 2:45 AM EDTSpecial Weather StatementRNKAshe60 min
Sep 25, 3:08 AM EDTSpecial Weather StatementRNKAlleghany, Wilkes52 min
Sep 25, 5:20 PM EDTSevere Thunderstorm WarningRNKSurry, Wilkes, Yadkin40 min
Sep 25, 6:09 PM EDTSpecial Weather StatementRNKSurry36 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.