Alert archive / North Carolina / Flash Flood Warnings in 2012
Flash Flood Warning 45, NWS Blacksburg, VA
NWS Blacksburg, VA issued this flash flood warning at Aug 5, 2012, 7:03 PM EDT for Ashe County, Watauga County, North Carolina; Grayson County, Smyth County, Virginia. It was in force for 5 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 5, 2012, 7:03 PM EDT (23:03 UTC)
- Expired
- Aug 6, 2012, 12:16 AM EDT
- In force
- 5 hr
- Issued by
- NWS Blacksburg, VA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Ashe County, NC, Watauga County, NC, Grayson County, VA, Smyth County, VA
The radar
The Roanoke radar (KFCX), 145 km from the middle of the area, began a volume at 23:06 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 |
|---|---|---|---|
| Aug 5, 9:11 PM EDT | FLASH FLOOD | 5 N Sugar Grove, NC | NORTH FORK ROAD CLOSED DUE TO WATER FLOWING ACROSS IT IN ZIONVILLE. |
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, 11.1 hours before the alert went out and 168 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.
- Mixed-layer CAPE
- 33 J/kg
- Mixed-layer CIN
- -85 J/kg
- Mixed-layer LCL
- 1026 m above ground
- 0-6 km bulk shear
- 5 kt
- 0-1 km storm-relative helicity
- -77 m²/s²
- 0-3 km storm-relative helicity
- -50 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
133
WGUS51 KRNK 052303
FFWRNK
NCC009-189-VAC077-173-060500-
/O.NEW.KRNK.FF.W.0045.120805T2303Z-120806T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
703 PM EDT SUN AUG 5 2012
THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A
* FLASH FLOOD WARNING FOR...
WESTERN ASHE COUNTY IN NORTHWEST NORTH CAROLINA
WATAUGA COUNTY IN NORTHWEST NORTH CAROLINA
SOUTHERN SMYTH COUNTY IN SOUTHWEST VIRGINIA
WESTERN GRAYSON COUNTY IN SOUTHWEST VIRGINIA
* UNTIL 100 AM EDT.
* AT 701 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
VERY HEAVY RAIN FROM SHOWERS AND THUNDERSTORMS OVER THE WARNED AREA.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WHITETOP...
MOUNT ROGERS SUMMIT...MOUNT ROGERS NATIONAL RECREATION AREA...
GRAYSON HIGHLANDS STATE PARK...THOMAS BRIDGE...SUGAR GROVE...
ADWOLF...VOLNEY...TROUTDALE...RUGBY AND FLATRIDGE.
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.
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.
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.
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 3635 8183 3635 8173 3641 8175 3647 8170
3654 8171 3658 8169 3663 8161 3678 8170
3682 8137 3680 8128 3611 8166 3610 8181
3616 8183 3621 8191 3627 8190 3629 8192
$$
KK3 follow-up statements
406
WGUS71 KRNK 052354
FFSRNK
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
754 PM EDT SUN AUG 5 2012
NCC009-189-VAC077-173-060500-
/O.CON.KRNK.FF.W.0045.000000T0000Z-120806T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ASHE NC-WATAUGA NC-SMYTH VA-GRAYSON VA-
754 PM EDT SUN AUG 5 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 100 AM EDT FOR
WESTERN ASHE...WATAUGA...SOUTHERN SMYTH AND WESTERN GRAYSON
COUNTIES...
AT 748 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE SHOWERS AND THUNDERSTORMS PRODUCING VERY HEAVY RAIN OVER
THE WARNED AREA.
LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ASHLAND...
MOUNT ROGERS SUMMIT...MOUNT ROGERS NATIONAL RECREATION AREA...GRAYSON
HIGHLANDS STATE PARK...THOMAS BRIDGE...SUGAR GROVE...ADWOLF...
WHITETOP...TROUTDALE...RUGBY...SHATLEY SPRINGS...NELLA...LANSING...
FLATWOOD AND CLIFTON
WATCH FOR FLOODING ALONG SHARP CREEK NEAR SILVERSTONE...THREE TOP
CREEK NEAR TROUT...AND BIG HORSE CREEK NEAR NELLA.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.
&&
LAT...LON 3635 8183 3635 8173 3641 8175 3647 8170
3654 8171 3658 8169 3663 8161 3678 8170
3682 8137 3680 8128 3611 8166 3610 8181
3616 8183 3621 8191 3627 8190 3629 8192
$$
KK110
WGUS71 KRNK 060304
FFSRNK
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
1104 PM EDT SUN AUG 5 2012
VAC077-173-060304-
/O.CAN.KRNK.FF.W.0045.000000T0000Z-120806T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SMYTH VA-GRAYSON VA-
1104 PM EDT SUN AUG 5 2012
...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR SOUTHERN SMYTH AND
WESTERN GRAYSON COUNTIES...
LAT...LON 3635 8183 3635 8173 3641 8175 3647 8170
3654 8171 3658 8169 3656 8141 3611 8166
3610 8181 3616 8183 3621 8191 3627 8190
3629 8192
$$
NCC009-189-060500-
/O.CON.KRNK.FF.W.0045.000000T0000Z-120806T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ASHE NC-WATAUGA NC-
1104 PM EDT SUN AUG 5 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 100 AM EDT FOR
WESTERN ASHE AND WATAUGA COUNTIES...
AT 1052 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THAT RAIN HAD BECOME LIGHT AND INTERMITTENT OVER THE WARNING AREA.
HOWEVER...RUNOFF FROM HEAVY RAINS THAT FELL EARLIER TODAY WILL
CONTINUE TO MAINTAIN HIGH WATER LEVELS IN MANY AREA STREAMS AND
CREEKS...AS WELL AS IN URBAN AREAS OF POOR DRAINAGE.
LOCAL LAW ENFORCEMENT REPORTED THAT A PORTION OF NORTH FORK WEST OF
THE TOWN OF ZIONVILLE AND NORTH OF THE TOWN OF MABEL HAD WASHED OUT
AND REMAINS CLOSED TO THRU TRAFFIC.
ALTHOUGH RAIN RATES AND ASSOCIATED RUNOFF HAVE MARKEDLY DECREASED
OVER THE AREA DURING THE PAST COUPLE OF HOURS...SMALL STREAMS AND
CREEKS WILL CONTINUE TO RUN HIGH INTO THE EARLY MORNING HOURS...SO
MOTORISTS ARE ADVISED TO EXERCISE CAUTION WHILE TRAVELING...AND SLOW
DOWN AND WATCH OUT FOR AREAS WHERE ROADWAYS MAY HAVE BEEN WASHED OUT.
LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SHATLEY
SPRINGS...NELLA...LANSING...FLATWOOD...CLIFTON AND ASHLAND
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DO NOT ATTEMPT TO CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN
DEPTH BY FOOT OR BY AUTOMOBILE.
PLEASE RELAY ANY REPORTS OF FLOODING INCLUDING MUDSLIDES...OR ROAD
CLOSURES TO THE NATIONAL WEATHER SERVICE IN BLACKSBURG BY CALLING
TOLL FREE...1...8 6 6...2 1 5...4 3 2 4. DELAYED REPORTS ARE WELCOME.
&&
LAT...LON 3635 8183 3635 8173 3641 8175 3647 8170
3654 8171 3658 8169 3656 8141 3611 8166
3610 8181 3616 8183 3621 8191 3627 8190
3629 8192
$$
WERT709
WGUS71 KRNK 060416
FFSRNK
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
1216 AM EDT MON AUG 6 2012
NCC009-189-060419-
/O.CAN.KRNK.FF.W.0045.000000T0000Z-120806T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ASHE NC-WATAUGA NC-
1216 AM EDT MON AUG 6 2012
...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR WESTERN ASHE AND
WATAUGA COUNTIES...
AT 1205 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THAT ONLY VERY LIGHT RAIN WAS OCCURRING IN THE MOUNTAINS OF
NORTHWESTERN NORTH CAROLINA. ALTHOUGH ADDITIONAL LIGHT RAIN MAY
CONTINUE OVER THE FORMERLY WARNED AREA THROUGH 100 AM EDT...ANY
ADDITIONAL RUNOFF IS NOT EXPECTED TO CAUSE FLOODING.
HOWEVER...SMALL STREAMS AND CREEKS WILL LIKELY CONTINUE TO RUN NEAR
BANKFULL WELL INTO THE PRE DAWN HOURS...SO MOTORISTS ARE ADVISED TO
EXERCISE CAUTION WHILE TRAVELING...AND SLOW DOWN AND WATCH OUT FOR
AREAS WHERE ROADBEDS MAY HAVE BEEN WASHED OUT FROM EARLIER HEAVY
RAIN.
LAT...LON 3635 8183 3635 8173 3641 8175 3647 8170
3654 8171 3658 8169 3656 8141 3611 8166
3610 8181 3616 8183 3621 8191 3627 8190
3629 8192
$$
WERTThe office that day
Everything else NWS Blacksburg, VA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 4, 10:32 PM EDT | Special Weather Statement | RNK | Surry, Yadkin | 58 min |
| Aug 5, 4:57 PM EDT | Special Weather Statement | RNK | Ashe | 63 min |
| Aug 5, 5:22 PM EDT | Areal Flood Warning | RNK | Ashe, Watauga | 104 min |
| Aug 5, 7:40 PM EDT | Special Weather Statement | RNK | Alleghany, Wilkes | 65 min |
| Aug 4, 11:33 PM EDT | Special Weather Statement | RNK | Floyd | 57 min |
| Aug 5, 3:15 PM EDT | Special Weather Statement | RNK | Rockbridge, City of Buena Vista, City of Lexington | 60 min |
| Aug 5, 4:41 PM EDT | Special Weather Statement | RNK | Amherst, Botetourt, City of Buena Vista, City of Lexington | 64 min |
| Aug 5, 5:54 PM EDT | Special Weather Statement | RNK | Giles | 66 min |
| Aug 5, 6:16 PM EDT | Areal Flood Advisory | RNK | Bland, Giles | 4 hr |
Nearby
Flash Flood Warnings in North Carolina, 2012Flash Flood Warnings in Virginia, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.