Alert archive / Virginia / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 145, NWS Blacksburg, VA

August 11, 20214 counties in Virginia; Rockingham County, North Carolina

NWS Blacksburg, VA issued this severe thunderstorm warning at Aug 11, 2021, 2:53 PM EDT for 4 counties in Virginia; Rockingham County, North Carolina. It was in force for 67 min. 3 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: Aug 11, 2021, 2:53 PM EDT (18:53 UTC)
Expired: Aug 11, 2021, 4:00 PM EDT
In force: 67 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Rockingham County, NC, City of Martinsville, VA, Henry County, VA, Patrick County, VA, Pittsylvania County, VA

The radar

The Roanoke radar (KFCX), 55 km from the middle of the area, began a volume at 18:56 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 11, 3:19 PM EDT	TSTM WND DMG	2 Nw Axton, VA	TREE DOWN NEAR CORNER OF CARDINAL ROAD AND WREN COURT. DAMAGE TO HOUSE AND TWO VEHICLES. TIME ESTIMATED FROM RADAR.
Aug 11, 3:19 PM EDT	TSTM WND DMG	2 Nw Martinsville Airpo, VA	TREE DOWN ON PHILPOTT HIGHWAY NEAR INTERSECTION WITH DUG MOUNTAIN ROAD. TIME ESTIMATED FROM RADAR.
Aug 11, 3:30 PM EDT	TSTM WND DMG	1 Ene Chatmoss, VA	LARGE TREE LIMB DOWN NEAR LAUREL DRIVE.

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Aug 11, 2:02 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 6.9 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: 653 J/kg
Mixed-layer CIN: -106 J/kg
Mixed-layer LCL: 1352 m above ground
0-6 km bulk shear: 2 kt
0-1 km storm-relative helicity: -15 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.

007 
WUUS51 KRNK 111853
SVRRNK
NCC157-VAC089-141-143-690-112000-
/O.NEW.KRNK.SV.W.0145.210811T1853Z-210811T2000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service BLACKSBURG VA
253 PM EDT Wed Aug 11 2021

The National Weather Service in BLACKSBURG has issued a

* Severe Thunderstorm Warning for...
  Northwestern Rockingham County in north central North Carolina...
  Southwestern Pittsylvania County in south central Virginia...
  The City of Martinsville in south central Virginia...
  Henry County in south central Virginia...
  Southeastern Patrick County in southwestern Virginia...

* Until 400 PM EDT.

* At 252 PM EDT, a severe thunderstorm was located over Spencer,
  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...
  Eden...
  Martinsville...
  Spencer...
  Axton...
  Leatherwood...
  Villa Heights...
  and Chatmoss.

This includes The following Locations The Martinsville Speedway and
Martinsville Airport.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail and damaging winds. For your
safety, move to an interior room on the lowest floor of a sturdy
building. Stay away from windows.

When it is safe to do so, please send your reports of hail of any
size, as well as reports of any 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 3652 8003 3654 8003 3655 8013 3668 8013
      3671 7992 3684 7959 3647 7965
TIME...MOT...LOC 1852Z 267DEG 10KT 3661 8004 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

VFJ

2 follow-up statements

137 
WWUS51 KRNK 111949
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
349 PM EDT Wed Aug 11 2021

VAC141-690-111959-
/O.CAN.KRNK.SV.W.0145.000000T0000Z-210811T2000Z/
City of Martinsville VA-Patrick VA-
349 PM EDT Wed Aug 11 2021

...THE SEVERE THUNDERSTORM WARNING FOR 
SOUTHEASTERN PATRICK COUNTY AND THE CITY OF MARTINSVILLE IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 900 PM EDT for
south central, central, southwestern and west central Virginia.

LAT...LON 3652 8003 3664 7982 3676 7979 3684 7959
      3647 7965
TIME...MOT...LOC 1949Z 254DEG 7KT 3667 7975 

$$

NCC157-VAC089-143-112000-
/O.CON.KRNK.SV.W.0145.000000T0000Z-210811T2000Z/
Rockingham NC-Pittsylvania VA-Henry VA-
349 PM EDT Wed Aug 11 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM EDT 
FOR NORTHWESTERN ROCKINGHAM...SOUTHWESTERN PITTSYLVANIA AND 
SOUTHEASTERN HENRY COUNTIES...

At 349 PM EDT, a severe thunderstorm was located over Axton, 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...
Eden...
Axton...
Leatherwood...
Price...
Draper...
Chatmoss...
and Aiken Summit.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for LARGE HAIL AND DAMAGING WINDS. For your
safety, move to an interior room on the lowest floor of a sturdy
building. Stay away from windows.

When it is safe to do so, please send your reports of hail of any
size, as well as reports of any 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 3652 8003 3664 7982 3676 7979 3684 7959
      3647 7965
TIME...MOT...LOC 1949Z 254DEG 7KT 3667 7975 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

DS

837 
WWUS51 KRNK 111956
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
356 PM EDT Wed Aug 11 2021

NCC157-VAC089-143-112006-
/O.EXP.KRNK.SV.W.0145.000000T0000Z-210811T2000Z/
Rockingham NC-Pittsylvania VA-Henry VA-
356 PM EDT Wed Aug 11 2021

...THE SEVERE THUNDERSTORM WARNING FOR 
NORTHWESTERN ROCKINGHAM...SOUTHWESTERN PITTSYLVANIA AND SOUTHEASTERN
HENRY COUNTIES WILL EXPIRE AT 400 PM EDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.

A Severe Thunderstorm Watch remains in effect until 900 PM EDT for
south central, central, southwestern and west central Virginia.

LAT...LON 3652 8003 3664 7982 3676 7979 3684 7959
      3647 7965
TIME...MOT...LOC 1956Z 267DEG 10KT 3667 7973 

$$

SH

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 11, 2:03 PM EDT	Special Weather Statement	RNK	Patrick	27 min
Aug 11, 2:06 PM EDT	Special Weather Statement	RNK	City of Lynchburg	39 min
Aug 11, 2:09 PM EDT	Special Weather Statement	RNK	Roanoke, City of Roanoke, City of Salem	51 min
Aug 11, 2:16 PM EDT	Severe Thunderstorm Warning	RNK	Bedford, Botetourt, Craig, Franklin, Montgomery, Roanoke and 2 more	59 min
Aug 11, 2:17 PM EDT	Severe Thunderstorm Warning	RNK	Patrick	58 min
Aug 11, 3:01 PM EDT	Special Weather Statement	RNK	Bedford	29 min
Aug 11, 3:13 PM EDT	Special Weather Statement	RNK	Franklin	32 min
Aug 11, 3:18 PM EDT	Severe Thunderstorm Warning	RNK	Amherst, Bedford, Campbell, City of Lynchburg	40 min
Aug 11, 3:40 PM EDT	Severe Thunderstorm Warning	RNK	Bedford, Franklin	34 min
Aug 11, 3:50 PM EDT	Special Weather Statement	RNK	Franklin	25 min
Aug 11, 4:09 PM EDT	Severe Thunderstorm Warning	RNK	Bedford, Campbell, Pittsylvania	36 min
Aug 11, 4:43 PM EDT	Special Weather Statement	RNK	Halifax	32 min
Aug 11, 4:58 PM EDT	Severe Thunderstorm Warning	RNK	Halifax, Pittsylvania	35 min
Aug 11, 2:25 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Surry, Wilkes, Yadkin	65 min
Aug 11, 3:05 PM EDT	Areal Flood Advisory	RNK	Alleghany, Wilkes	3 hr
Aug 11, 3:09 PM EDT	Special Weather Statement	RNK	Stokes	36 min
Aug 11, 3:27 PM EDT	Severe Thunderstorm Warning	RNK	Wilkes, Yadkin	33 min
Aug 11, 3:31 PM EDT	Special Weather Statement	RNK	Yadkin	29 min
Aug 11, 3:46 PM EDT	Severe Thunderstorm Warning	RNK	Yadkin	47 min
Aug 11, 4:07 PM EDT	Special Weather Statement	RNK	Yadkin	38 min
Aug 11, 4:39 PM EDT	Areal Flood Advisory	RNK	Yadkin	3 hr

Nearby

Severe Thunderstorm Warnings in Virginia, 2021 Severe Thunderstorm Warnings in North Carolina, 2021 Every severe thunderstorm warning in 2021

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.