Alert archive / Virginia / Flash Flood Warnings in 2011
Flash Flood Warning 52, NWS Blacksburg, VA
NWS Blacksburg, VA issued this flash flood warning at Jul 7, 2011, 4:53 PM EDT for Halifax County, Virginia. It was in force for 3 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
- Jul 7, 2011, 4:53 PM EDT (20:53 UTC)
- Expired
- Jul 7, 2011, 7:57 PM EDT
- In force
- 3 hr
- Issued by
- NWS Blacksburg, VA
- Area
- Storm-based polygon
- Flood severity
- None
County Halifax County, VA
The radar
The Raleigh/Durham radar (KRAX), 112 km from the middle of the area, began a volume at 20:53 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
Roanoke, VA (KRNK), launched 12:00Z, 8.9 hours before the alert went out and 93 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
- 113 J/kg
- Mixed-layer CIN
- -87 J/kg
- Mixed-layer LCL
- 1046 m above ground
- 0-6 km bulk shear
- 3 kt
- 0-1 km storm-relative helicity
- -1 m²/s²
- 0-3 km storm-relative helicity
- 5 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
821
WGUS51 KRNK 072053
FFWRNK
VAC083-080245-
/O.NEW.KRNK.FF.W.0052.110707T2053Z-110708T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
453 PM EDT THU JUL 7 2011
THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTHEASTERN HALIFAX COUNTY IN SOUTH CENTRAL VIRGINIA
* UNTIL 1045 PM EDT.
* AT 448 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 STAUNTON
RIVER STATE PARK...SOUTH BOSTON...SCOTTSBURG...HALIFAX AND DRYBURG.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
ADDITIONAL RAINFALL AMOUNTS OF 1 TO 3 INCHES ARE POSSIBLE IN THE
WARNED AREA. AROUND 2 INCHES OF RAIN HAS ALREADY FALLEN.
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.
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 3663 7855 3663 7858 3669 7865 3669 7867
3665 7870 3658 7871 3656 7873 3654 7872
3654 7908 3685 7897 3679 7869 3671 7867
3670 7864 3668 7863
$$2 follow-up statements
718
WGUS71 KRNK 072224
FFSRNK
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
624 PM EDT THU JUL 7 2011
VAC083-080245-
/O.CON.KRNK.FF.W.0052.000000T0000Z-110708T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
HALIFAX VA-
624 PM EDT THU JUL 7 2011
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1045 PM EDT FOR
SOUTHEASTERN HALIFAX COUNTY...
AT 620 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE AROUND 3 INCHES OF RAIN FROM THUNDERSTORMS IN A FEW HOURS.
OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
TURBEVILLE AND ALTON.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
ADDITIONAL RAINFALL AMOUNTS OF ABOUT AN INCH ARE POSSIBLE IN THE
WARNED AREA.
PLEASE RELAY ANY REPORTS OF FLOODING INCLUDING MUDSLIDES...OR ROAD
CLOSURES TO THE NATIONAL WEATHER SERVICE IN BLACKSBURG BY CALLING
TOLL FREE...1...8 6 6...2 1 5...4 3 2 4. DELAYED REPORTS ARE WELCOME.
&&
LAT...LON 3663 7855 3663 7858 3669 7865 3669 7867
3665 7870 3658 7871 3656 7873 3654 7872
3654 7908 3685 7897 3679 7869 3671 7867
3670 7864 3668 7863
$$085
WGUS71 KRNK 072357
FFSRNK
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
757 PM EDT THU JUL 7 2011
VAC083-080008-
/O.CAN.KRNK.FF.W.0052.000000T0000Z-110708T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
HALIFAX VA-
757 PM EDT THU JUL 7 2011
...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR SOUTHEASTERN
HALIFAX COUNTY...
HEAVY RAIN HAS ENDED OVER THE WARNED AREA...THUS THE FLASH FLOOD
WARNING HAS BEEN CANCELLED.
LAT...LON 3663 7855 3663 7858 3669 7865 3669 7867
3665 7870 3658 7871 3656 7873 3654 7872
3654 7908 3685 7897 3679 7869 3671 7867
3670 7864 3668 7863
$$The office that day
Everything else NWS Blacksburg, VA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 7, 2:04 PM EDT | Special Weather Statement | RNK | Grayson | 56 min |
| Jul 7, 2:57 PM EDT | Special Weather Statement | RNK | City of Galax | 33 min |
| Jul 7, 3:21 PM EDT | Special Weather Statement | RNK | Charlotte | 39 min |
| Jul 7, 3:27 PM EDT | Severe Thunderstorm Warning | RNK | Charlotte | 38 min |
| Jul 7, 4:22 PM EDT | Special Weather Statement | RNK | Halifax | 53 min |
| Jul 7, 4:38 PM EDT | Special Weather Statement | RNK | Pulaski | 37 min |
| Jul 7, 5:04 PM EDT | Flash Flood Warning | RNK | Pulaski | 3 hr |
| Jul 7, 5:52 PM EDT | Special Weather Statement | RNK | Smyth | 38 min |
| Jul 7, 5:59 PM EDT | Special Weather Statement | RNK | Carroll | 31 min |
| Jul 7, 6:07 PM EDT | Severe Thunderstorm Warning | RNK | Carroll | 23 min |
| Jul 7, 7:02 PM EDT | Special Weather Statement | RNK | City of Danville | 28 min |
| Jul 7, 7:36 PM EDT | Special Weather Statement | RNK | City of Martinsville | 54 min |
Nearby
Flash Flood Warnings in Virginia, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.