Alert archive / Virginia / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 113, NWS Blacksburg, VA

June 20, 20144 counties in Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at Jun 20, 2014, 5:33 PM EDT for 4 counties in Virginia. It was in force for 57 min. 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: Jun 20, 2014, 5:33 PM EDT (21:33 UTC)
Expired: Jun 20, 2014, 6:30 PM EDT
In force: 57 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Floyd County, VA, Franklin County, VA, Montgomery County, VA, Roanoke County, VA

The radar

The Roanoke radar (KFCX), 14 km from the middle of the area, began a volume at 21:33 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
Jun 20, 5:37 PM EDT	HAIL 0.5	4 Se Bent Mountain, VA	DIME SIZED HAIL.
Jun 20, 6:18 PM EDT	TSTM WND DMG	4 Se Boones Mill, VA	ONE TREE DOWN ALONG WIRTZ ROAD, JUST OFF U.S. 220.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Roanoke, VA (KRNK), launched 12:00Z, 9.6 hours before the alert went out and 58 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: 99 J/kg
Mixed-layer CIN: -43 J/kg
Mixed-layer LCL: 801 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: 21 m²/s²
0-3 km storm-relative helicity: -21 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.

692 
WUUS51 KRNK 202133
SVRRNK
VAC063-067-121-161-202230-
/O.NEW.KRNK.SV.W.0113.140620T2133Z-140620T2230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
533 PM EDT FRI JUN 20 2014

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN ROANOKE COUNTY IN WEST CENTRAL VIRGINIA...
  NORTHEASTERN FLOYD COUNTY IN SOUTHWEST VIRGINIA...
  SOUTHEASTERN MONTGOMERY COUNTY IN SOUTHWEST VIRGINIA...
  CENTRAL FRANKLIN COUNTY IN WEST CENTRAL VIRGINIA...

* UNTIL 630 PM EDT

* AT 533 PM EDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR COPPER
  HILL...MOVING EAST AT 10 MPH.

  HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL. 

  SOURCE...RADAR INDICATED. 

  IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE 
           TO ROOFS...SIDING AND TREES. 

* LOCATIONS IMPACTED INCLUDE...
  CHRISTIANSBURG...
  ROCKY MOUNT...
  BOONES MILL...
  PILOT...
  AND COPPER HILL. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

PREPARE IMMEDIATELY FOR LARGE HAIL AND DAMAGING WINDS. PEOPLE OUTSIDE
SHOULD MOVE TO A SHELTER...INSIDE A STRONG BUILDING AND AWAY FROM
WINDOWS.

WHEN IT IS SAFE TO DO SO...PLEASE SEND YOUR REPORTS OF HAIL OF ANY
SIZE...AS WELL AS ANY REPORTS OF WIND DAMAGE...INCLUDING DOWNED TREES
OR LARGE LIMBS...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 3707 8044 3727 8018 3715 7983 3700 7988
      3693 8003
TIME...MOT...LOC 2133Z 289DEG 7KT 3711 8008 

HAIL...1.00IN
WIND...60MPH

$$

16

2 follow-up statements

080 
WWUS51 KRNK 202206
SVSRNK

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
606 PM EDT FRI JUN 20 2014

VAC121-202215-
/O.CAN.KRNK.SV.W.0113.000000T0000Z-140620T2230Z/
MONTGOMERY VA-

606 PM EDT FRI JUN 20 2014

...THE SEVERE THUNDERSTORM WARNING FOR 
SOUTHEASTERN MONTGOMERY COUNTY IS CANCELLED...
    
THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF 
THE WARNED AREA. THEREFORE THE WARNING HAS BEEN CANCELLED.

WHEN IT IS SAFE TO DO SO...PLEASE SEND YOUR REPORTS OF HAIL OF ANY
SIZE...AS WELL AS ANY REPORTS OF WIND DAMAGE...INCLUDING DOWNED TREES
OR LARGE LIMBS...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 3703 8030 3709 8025 3711 8018 3717 8018
      3725 8012 3715 7983 3700 7988 3693 8003
TIME...MOT...LOC 2205Z 042DEG 9KT 3706 8011 

$$

VAC063-067-161-202230-
/O.CON.KRNK.SV.W.0113.000000T0000Z-140620T2230Z/
ROANOKE VA-FLOYD VA-FRANKLIN VA-
606 PM EDT FRI JUN 20 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR
SOUTHERN ROANOKE...NORTHEASTERN FLOYD AND CENTRAL FRANKLIN
COUNTIES...

AT 605 PM EDT...A SEVERE THUNDERSTORM WAS LOCATED OVER COPPER HILL...
MOVING SOUTHWEST AT 10 MPH.

HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL. 

SOURCE...RADAR INDICATED. 

IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE TO 
         ROOFS...SIDING AND TREES. 

LOCATIONS IMPACTED INCLUDE...
ROCKY MOUNT...
BOONES MILL...
COPPER HILL...
BENT MOUNTAIN...
AND FERRUM. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

PREPARE IMMEDIATELY FOR LARGE HAIL AND DAMAGING WINDS. PEOPLE OUTSIDE
SHOULD MOVE TO A SHELTER...INSIDE A STRONG BUILDING AND AWAY FROM
WINDOWS.

WHEN IT IS SAFE TO DO SO...PLEASE SEND YOUR REPORTS OF HAIL OF ANY
SIZE...AS WELL AS ANY REPORTS OF WIND DAMAGE...INCLUDING DOWNED TREES
OR LARGE LIMBS...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 3703 8030 3709 8025 3711 8018 3717 8018
      3725 8012 3715 7983 3700 7988 3693 8003
TIME...MOT...LOC 2205Z 042DEG 9KT 3706 8011 

HAIL...1.00IN
WIND...60MPH

$$

JH

150 
WWUS51 KRNK 202220
SVSRNK

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
620 PM EDT FRI JUN 20 2014

VAC063-067-161-202229-
/O.CAN.KRNK.SV.W.0113.000000T0000Z-140620T2230Z/
ROANOKE VA-FLOYD VA-FRANKLIN VA-
620 PM EDT FRI JUN 20 2014

...THE SEVERE THUNDERSTORM WARNING FOR 
SOUTHERN ROANOKE...NORTHEASTERN FLOYD AND CENTRAL FRANKLIN COUNTIES
IS CANCELLED...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSE AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
THEREFORE THE WARNING HAS BEEN CANCELLED.  HOWEVER GUSTY WINDS ARE
STILL POSSIBLE WITH THIS THUNDERSTORM.

WHEN IT IS SAFE TO DO SO...PLEASE SEND YOUR REPORTS OF HAIL OF ANY
SIZE...AS WELL AS ANY REPORTS OF WIND DAMAGE...INCLUDING DOWNED TREES
OR LARGE LIMBS...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 3703 8030 3709 8025 3711 8018 3717 8018
      3725 8012 3715 7983 3700 7988 3693 8003
TIME...MOT...LOC 2216Z 289DEG 7KT 3705 8008 

$$

16

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 19, 9:50 PM EDT	Special Weather Statement	RNK	Wythe	55 min
Jun 20, 1:38 PM EDT	Special Weather Statement	RNK	Pittsylvania	37 min
Jun 20, 2:01 PM EDT	Special Weather Statement	RNK	Pittsylvania	29 min
Jun 20, 2:33 PM EDT	Special Weather Statement	RNK	City of Danville	42 min
Jun 20, 2:53 PM EDT	Special Weather Statement	RNK	Henry	67 min
Jun 20, 2:59 PM EDT	Special Weather Statement	RNK	Bedford	31 min
Jun 20, 3:01 PM EDT	Areal Flood Advisory	RNK	Pittsylvania, City of Danville	119 min
Jun 20, 3:07 PM EDT	Severe Thunderstorm Warning	RNK	Bedford, Botetourt, Franklin	38 min
Jun 20, 3:18 PM EDT	Special Weather Statement	RNK	Tazewell	57 min
Jun 20, 3:28 PM EDT	Severe Thunderstorm Warning	RNK	Henry, Patrick	32 min
Jun 20, 3:38 PM EDT	Severe Thunderstorm Warning	RNK	Tazewell	37 min
Jun 20, 3:48 PM EDT	Severe Thunderstorm Warning	RNK	Henry, City of Martinsville	42 min
Jun 20, 3:51 PM EDT	Severe Thunderstorm Warning	RNK	Bedford, Franklin	39 min
Jun 20, 3:53 PM EDT	Severe Thunderstorm Warning	RNK	Carroll, Patrick	67 min
Jun 20, 4:11 PM EDT	Special Weather Statement	RNK	Patrick	49 min
Jun 20, 4:18 PM EDT	Special Weather Statement	RNK	Tazewell	42 min
Jun 20, 4:21 PM EDT	Special Weather Statement	RNK	Amherst, City of Buena Vista, City of Lynchburg	39 min
Jun 20, 4:26 PM EDT	Flash Flood Warning	RNK	Patrick	2 hr
Jun 20, 4:33 PM EDT	Special Weather Statement	RNK	City of Buena Vista	42 min
Jun 20, 4:37 PM EDT	Special Weather Statement	RNK	Franklin	38 min
Jun 20, 4:42 PM EDT	Special Weather Statement	RNK	Montgomery	48 min
Jun 20, 5:19 PM EDT	Special Weather Statement	RNK	Campbell, City of Lynchburg	56 min
Jun 20, 5:48 PM EDT	Severe Thunderstorm Warning	RNK	Appomattox, Campbell, Charlotte, Halifax, City of Lynchburg	57 min
Jun 20, 6:18 PM EDT	Severe Thunderstorm Warning	RNK	Bedford, Botetourt, Craig	57 min
Jun 20, 6:43 PM EDT	Severe Thunderstorm Warning	RNK	Campbell, Charlotte, Halifax, Pittsylvania	62 min
Jun 20, 7:00 PM EDT	Special Weather Statement	RNK	Bedford	45 min
Jun 20, 7:15 PM EDT	Special Weather Statement	RNK	Botetourt	60 min
Jun 20, 7:43 PM EDT	Special Weather Statement	RNK	Amherst, Rockbridge, City of Buena Vista, City of Lexington, City of Lynchburg	47 min
Jun 20, 7:51 PM EDT	Special Weather Statement	RNK	Campbell, Charlotte, City of Lynchburg	39 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2014 Every severe thunderstorm warning in 2014

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.