Alert archive / Virginia / Flash Flood Warnings in 2016

Flash Flood Warning 20, NWS Blacksburg, VA

June 23, 2016Halifax County, Pittsylvania County, City of Danville, Virginia; Caswell County, North Carolina

NWS Blacksburg, VA issued this flash flood warning at Jun 23, 2016, 9:56 PM EDT for Halifax County, Pittsylvania County, City of Danville, Virginia; Caswell County, North Carolina. It was in force for 6 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: Jun 23, 2016, 9:56 PM EDT (01:56 UTC)
Expired: Jun 24, 2016, 4:00 AM EDT
In force: 6 hr
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Flood severity: None

Counties Caswell County, NC, City of Danville, VA, Halifax County, VA, Pittsylvania County, VA

The radar

The Raleigh/Durham radar (KRAX), 114 km from the middle of the area, began a volume at 02:01 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 00:00Z, 1.9 hours before the alert went out and 81 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: 564 J/kg
Mixed-layer CIN: -86 J/kg
Mixed-layer LCL: 750 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 287 m²/s²
0-3 km storm-relative helicity: 326 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 9.9

Open this sounding in Storm Lab

The text

As transmitted.

770 
WGUS51 KRNK 240156
FFWRNK
NCC033-VAC083-143-590-240800-
/O.NEW.KRNK.FF.W.0020.160624T0156Z-160624T0800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
956 PM EDT THU JUN 23 2016

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CASWELL COUNTY IN NORTH CAROLINA...
  SOUTHEASTERN PITTSYLVANIA COUNTY IN VIRGINIA...
  SOUTHERN HALIFAX COUNTY IN VIRGINIA...
  THE CITY OF DANVILLE IN VIRGINIA...

* UNTIL 400 AM EDT FRIDAY
    
* AT 953 PM EDT...DOPPLER RADAR INDICATED CLUSTERS OF THUNDERSTORMS
  PRODUCING HEAVY RAIN ACROSS THE WARNED AREA. UP TO TWO INCHES OF
  RAIN HAS ALREADY FALLEN IN PART OF THE WARNED AREA. AS MORE STORMS
  MOVE IN FRMO THE WEST...FLASH FLOODING IS EXPECTED TO BEGIN
  SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  DANVILLE...
  SOUTH BOSTON...
  YANCEYVILLE...
  BETHEL...
  AND HALIFAX. 

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

THIS INCLUDES DANVILLE AIRPORT.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

WHEN IT IS SAFE TO DO SO...PLEASE SEND YOUR REPORTS OF FLOODING...
INCLUDING MUDSLIDES OR ROAD CLOSURES...TO THE NATIONAL WEATHER
SERVICE BY CALLING TOLL FREE AT 1...8 6 6...2 1 5...4 3 2 4. REPORTS
AND PICTURES CAN ALSO BE SHARED ON THE NATIONAL WEATHER SERVICE
BLACKSBURG FACEBOOK PAGE AND ON TWITTER.

&&

LAT...LON 3674 7869 3673 7868 3668 7868 3668 7870
      3667 7870 3664 7871 3658 7872 3656 7874
      3654 7873 3654 7914 3635 7915 3636 7952
      3654 7951 3654 7952 3683 7952 3679 7868
      3678 7867

$$

SK

2 follow-up statements

465 
WGUS71 KRNK 240330
FFSRNK

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
1130 PM EDT THU JUN 23 2016

NCC033-VAC083-143-590-240800-
/O.CON.KRNK.FF.W.0020.000000T0000Z-160624T0800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CASWELL NC-PITTSYLVANIA VA-HALIFAX VA-CITY OF DANVILLE VA-
1130 PM EDT THU JUN 23 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 400 AM EDT FOR 
CASWELL...SOUTHEASTERN PITTSYLVANIA...SOUTHERN HALIFAX COUNTIES AND
THE CITY OF DANVILLE...

AT 1123 PM EDT...DOPPLER RADAR INDICATED THAT THE HEAVIEST RAINFALL
FROM THUNDERSTORMS HAD MOVED SOUTH OF THE WARNED AREA....HOWEVER
RADAR ESTIMATES OF UP TO THREE INCHES OF RAIN HAD ALREADY OCCURED IN
THE LAST THREE HOURS. FLASH FLOODING IS STILL POSSIBLE ON SOME SMALL
CREEKS AND STREAMS DUE TO RUNOFF...ALTHOUGH NONE HAS BEEN REPORTED
SO FAR.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
DANVILLE...
ELMO...
CLUSTER SPRINGS...
PROVIDENCE...
AND SEMORA. 

THIS INCLUDES STREAMS SUCH AS RATTLESNAKE CREEK...COUNTY LINE
CREEK...BIRCH CREEK...CARLTON CREEK...AND OTHER TRIBUTARIES OF THE
DAN RIVER.

ADDITIONAL RAINFALL AMOUNTS OF A HALF AN INCH ARE POSSIBLE IN THE
WARNED AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

WHEN IT IS SAFE TO DO SO...PLEASE SEND YOUR REPORTS OF FLOODING...
INCLUDING MUDSLIDES OR ROAD CLOSURES...TO THE NATIONAL WEATHER
SERVICE BY CALLING TOLL FREE AT 1...8 6 6...2 1 5...4 3 2 4. REPORTS
AND PICTURES CAN ALSO BE SHARED ON THE NATIONAL WEATHER SERVICE
BLACKSBURG FACEBOOK PAGE AND ON TWITTER.

&&

LAT...LON 3674 7869 3673 7868 3668 7868 3668 7870
      3667 7870 3664 7871 3658 7872 3656 7874
      3654 7873 3654 7914 3635 7915 3636 7952
      3654 7951 3654 7952 3683 7952 3679 7868
      3678 7867

$$

SK

027 
WGUS71 KRNK 240518
FFSRNK

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
118 AM EDT FRI JUN 24 2016

NCC033-VAC083-143-590-240527-
/O.CAN.KRNK.FF.W.0020.000000T0000Z-160624T0800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CASWELL NC-PITTSYLVANIA VA-HALIFAX VA-CITY OF DANVILLE VA-
118 AM EDT FRI JUN 24 2016

...THE FLASH FLOOD WARNING FOR 
CASWELL...SOUTHEASTERN PITTSYLVANIA...SOUTHERN HALIFAX COUNTIES AND
THE CITY OF DANVILLE IS CANCELLED...

THE HEAVY RAIN HAS ENDED...AND FLOODING IS NO LONGER EXPECTED TO POSE
A THREAT. PLEASE CONTINUE TO HEED ALL ROAD CLOSURES.

WHEN IT IS SAFE TO DO SO...PLEASE SEND YOUR REPORTS OF FLOODING...
INCLUDING MUDSLIDES OR ROAD CLOSURES...TO THE NATIONAL WEATHER
SERVICE BY CALLING TOLL FREE AT 1...8 6 6...2 1 5...4 3 2 4. REPORTS
AND PICTURES CAN ALSO BE SHARED ON THE NATIONAL WEATHER SERVICE
BLACKSBURG FACEBOOK PAGE AND ON TWITTER.

LAT...LON 3674 7869 3673 7868 3668 7868 3668 7870
      3667 7870 3664 7871 3658 7872 3656 7874
      3654 7873 3654 7914 3635 7915 3636 7952
      3654 7951 3654 7952 3683 7952 3679 7868
      3678 7867

$$

MBS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 23, 8:12 PM EDT	Severe Thunderstorm Warning	RNK	Bland, Carroll, Floyd, Giles, Montgomery, Pulaski and 3 more	48 min
Jun 23, 8:15 PM EDT	Severe Thunderstorm Warning	RNK	Bland, Smyth, Tazewell	45 min
Jun 23, 8:28 PM EDT	Areal Flood Advisory	RNK	Montgomery, Roanoke, City of Radford, City of Roanoke, City of Salem	6 hr
Jun 23, 8:49 PM EDT	Areal Flood Advisory	RNK	Bedford	6 hr
Jun 23, 8:51 PM EDT	Severe Thunderstorm Warning	RNK	Bland, Grayson, Pulaski, Smyth, Tazewell, Wythe	39 min
Jun 23, 9:10 PM EDT	Special Weather Statement	RNK	Floyd, Franklin, Pittsylvania	35 min
Jun 23, 9:29 PM EDT	Severe Thunderstorm Warning	RNK	Carroll, Grayson, Patrick, Pulaski, Wythe, City of Galax	61 min
Jun 23, 9:46 PM EDT	Special Weather Statement	RNK	Halifax, Henry, Patrick, Pittsylvania, City of Danville, City of Martinsville	44 min
Jun 23, 10:35 PM EDT	Special Weather Statement	RNK	City of Danville	55 min
Jun 23, 11:12 PM EDT	Areal Flood Warning	RNK	Alleghany, City of Covington	18 hr
Jun 23, 11:54 PM EDT	Areal Flood Warning	RNK	Bath	6 hr
Jun 24, 11:32 AM EDT	Special Weather Statement	RNK	Alleghany	58 min
Jun 24, 12:48 PM EDT	Special Weather Statement	RNK	Alleghany, City of Covington	57 min
Jun 24, 6:36 PM EDT	Areal Flood Advisory	RNK	City of Roanoke	114 min
Jun 23, 9:15 PM EDT	Special Weather Statement	RNK	Rockingham	30 min
Jun 23, 10:07 PM EDT	Special Weather Statement	RNK	Caswell	23 min
Jun 23, 10:30 PM EDT	Special Weather Statement	RNK	Surry, Yadkin	60 min
Jun 23, 10:56 PM EDT	Special Weather Statement	RNK	Watauga, Wilkes	64 min

Nearby

Flash Flood Warnings in Virginia, 2016 Flash Flood Warnings in North Carolina, 2016 Every flash flood warning in 2016

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.