Alert archive / Virginia / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 76, NWS Blacksburg, VA

July 11, 2021Campbell County, Halifax County, Pittsylvania County, Virginia; Caswell County, North Carolina

NWS Blacksburg, VA issued this severe thunderstorm warning at Jul 11, 2021, 1:38 PM EDT for Campbell County, Halifax County, Pittsylvania County, Virginia; Caswell County, North Carolina. It was in force for 67 min. 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: Jul 11, 2021, 1:38 PM EDT (17:38 UTC)
Expired: Jul 11, 2021, 2:45 PM EDT
In force: 67 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Caswell County, NC, Campbell County, VA, Halifax County, VA, Pittsylvania County, VA

The radar

The Roanoke radar (KFCX), 112 km from the middle of the area, began a volume at 17:40 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
Jul 11, 1:42 PM EDT	TSTM WND DMG	1 Nnw Hurt, VA	A FEW TREES DOWN NEAR HURT.

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, 5.6 hours before the alert went out and 55 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: 267 J/kg
Mixed-layer CIN: -28 J/kg
Mixed-layer LCL: 700 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 68 m²/s²
0-3 km storm-relative helicity: 82 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

661 
WUUS51 KRNK 111738
SVRRNK
NCC033-VAC031-083-143-111845-
/O.NEW.KRNK.SV.W.0076.210711T1738Z-210711T1845Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service BLACKSBURG VA
138 PM EDT Sun Jul 11 2021

The National Weather Service in BLACKSBURG has issued a

* Severe Thunderstorm Warning for...
  Central Caswell County in north central North Carolina...
  Campbell County in central Virginia...
  Eastern Pittsylvania County in south central Virginia...
  Halifax County in south central Virginia...

* Until 245 PM EDT.

* At 137 PM EDT, severe thunderstorms were located along a line
  extending from Altavista to near Java to near Jericho, moving
  northeast at 20 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  South Boston...
  Altavista...
  Yanceyville...
  Halifax...
  Hurt...
  Brookneal...
  and Turbeville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for 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 3697 7880 3699 7877 3654 7894 3654 7913
      3638 7915 3625 7949 3654 7938 3657 7930
      3661 7935 3674 7930 3715 7937 3739 7900
      3725 7892 3724 7886 3721 7886 3720 7883
      3702 7891 3698 7890 3698 7879 3700 7876
TIME...MOT...LOC 1737Z 236DEG 20KT 3712 7930 3677 7924 3634 7941 

HAIL...<.75IN
WIND...60MPH
 
$$

RR

3 follow-up statements

390 
WWUS51 KRNK 111802
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
202 PM EDT Sun Jul 11 2021

NCC033-VAC031-083-143-111845-
/O.CON.KRNK.SV.W.0076.000000T0000Z-210711T1845Z/
Caswell NC-Campbell VA-Pittsylvania VA-Halifax VA-
202 PM EDT Sun Jul 11 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 PM EDT
FOR
NORTHEASTERN CASWELL...CAMPBELL...EASTERN PITTSYLVANIA AND HALIFAX
COUNTIES...

At 202 PM EDT, severe thunderstorms were located along a line
extending from near Gladys to near Ridgeway to near Hamer, moving
northeast at 25 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
South Boston...
Altavista...
Yanceyville...
Halifax...
Hurt...
Brookneal...
and Turbeville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for 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 3697 7880 3699 7877 3654 7894 3654 7913
      3643 7914 3639 7936 3657 7930 3679 7924
      3719 7931 3739 7900 3725 7892 3724 7886
      3721 7886 3720 7883 3702 7891 3698 7890
      3700 7876
TIME...MOT...LOC 1802Z 236DEG 20KT 3719 7917 3684 7911 3641 7928 

HAIL...<.75IN
WIND...60MPH
 
$$

RR

371 
WWUS51 KRNK 111826
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
226 PM EDT Sun Jul 11 2021

NCC033-VAC143-111835-
/O.CAN.KRNK.SV.W.0076.000000T0000Z-210711T1845Z/
Caswell NC-Pittsylvania VA-
226 PM EDT Sun Jul 11 2021

...THE SEVERE THUNDERSTORM WARNING FOR 
NORTHEASTERN CASWELL AND EASTERN PITTSYLVANIA COUNTIES IS
CANCELLED...

The storms which prompted the warning have 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 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 3654 7894 3654 7918 3687 7908 3701 7911
      3706 7909 3709 7912 3727 7916 3739 7900
      3725 7892 3724 7886 3721 7886 3720 7883
      3702 7891 3698 7890 3698 7882 3695 7878
TIME...MOT...LOC 1825Z 236DEG 20KT 3726 7905 3691 7899 3648 7916 

$$

VAC031-083-111845-
/O.CON.KRNK.SV.W.0076.000000T0000Z-210711T1845Z/
Campbell VA-Halifax VA-
226 PM EDT Sun Jul 11 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 PM EDT
FOR EASTERN CAMPBELL AND WESTERN HALIFAX COUNTIES...

At 225 PM EDT, severe thunderstorms were located along a line
extending from near Rustburg to near Nathalie to Semora, moving
northeast at 25 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
South Boston...
Halifax...
Brookneal...
Concord...
Rustburg...
Turbeville...
and Nathalie.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for 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 3654 7894 3654 7918 3687 7908 3701 7911
      3706 7909 3709 7912 3727 7916 3739 7900
      3725 7892 3724 7886 3721 7886 3720 7883
      3702 7891 3698 7890 3698 7882 3695 7878
TIME...MOT...LOC 1825Z 236DEG 20KT 3726 7905 3691 7899 3648 7916 

HAIL...<.75IN
WIND...60MPH
 
$$

HANES

546 
WWUS51 KRNK 111842
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
242 PM EDT Sun Jul 11 2021

VAC031-083-111851-
/O.EXP.KRNK.SV.W.0076.000000T0000Z-210711T1845Z/
Campbell VA-Halifax VA-
242 PM EDT Sun Jul 11 2021

...THE SEVERE THUNDERSTORM WARNING FOR 
EASTERN CAMPBELL AND WESTERN HALIFAX COUNTIES WILL EXPIRE AT 245 PM
EDT...
    
The storms which prompted the warning have weakened below severe
limits, and have exited the warned area. Therefore, the warning will
be allowed to expire.

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 3654 7894 3654 7918 3687 7908 3701 7911
      3706 7909 3709 7912 3727 7916 3739 7900
      3725 7892 3724 7886 3721 7886 3720 7883
      3702 7891 3698 7890 3698 7882 3695 7878
TIME...MOT...LOC 1841Z 236DEG 20KT 3731 7896 3696 7890 3653 7907 

$$

Hanes

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 10, 8:32 PM EDT	Special Weather Statement	RNK	Carroll, Giles, Pulaski, City of Galax	58 min
Jul 10, 10:07 PM EDT	Areal Flood Advisory	RNK	Craig, Floyd, Giles, Montgomery, Pulaski, Roanoke and 1 more	113 min
Jul 10, 10:22 PM EDT	Special Weather Statement	RNK	Patrick	23 min
Jul 10, 10:49 PM EDT	Special Weather Statement	RNK	Floyd, Franklin, Henry, Patrick	56 min
Jul 11, 12:20 AM EDT	Special Weather Statement	RNK	City of Roanoke, City of Salem	55 min
Jul 11, 11:21 AM EDT	Special Weather Statement	RNK	Halifax	24 min
Jul 11, 11:43 AM EDT	Severe Thunderstorm Warning	RNK	Halifax	62 min
Jul 11, 11:53 AM EDT	Special Weather Statement	RNK	City of Martinsville	37 min
Jul 11, 12:24 PM EDT	Special Weather Statement	RNK	City of Danville	36 min
Jul 11, 12:42 PM EDT	Special Weather Statement	RNK	Charlotte	33 min
Jul 11, 12:46 PM EDT	Special Weather Statement	RNK	Pittsylvania, City of Danville	44 min
Jul 11, 1:10 PM EDT	Special Weather Statement	RNK	Charlotte	35 min
Jul 11, 2:34 PM EDT	Special Weather Statement	RNK	City of Lynchburg	26 min
Jul 11, 2:43 PM EDT	Special Weather Statement	RNK	Charlotte	32 min
Jul 11, 2:56 PM EDT	Special Weather Statement	RNK	Carroll	34 min
Jul 11, 3:27 PM EDT	Special Weather Statement	RNK	Grayson, Wythe	48 min
Jul 11, 5:17 PM EDT	Flash Flood Warning	RNK	Grayson, Smyth, Wythe	3 hr
Jul 11, 5:38 PM EDT	Flash Flood Warning	RNK	Grayson	3 hr
Jul 11, 5:45 PM EDT	Special Weather Statement	RNK	Pulaski, City of Radford	60 min
Jul 11, 6:02 PM EDT	Special Weather Statement	RNK	Carroll, City of Galax	58 min
Jul 11, 6:12 PM EDT	Flash Flood Warning	RNK	Carroll, Grayson, City of Galax	3 hr
Jul 11, 6:30 PM EDT	Special Weather Statement	RNK	Bath	60 min
Jul 11, 6:47 PM EDT	Severe Thunderstorm Warning	RNK	Bath	58 min
Jul 11, 1:27 PM EDT	Special Weather Statement	RNK	Caswell	48 min
Jul 11, 2:18 PM EDT	Special Weather Statement	RNK	Caswell	27 min
Jul 11, 2:46 PM EDT	Severe Thunderstorm Warning	RNK	Caswell, Rockingham	31 min
Jul 11, 3:29 PM EDT	Areal Flood Advisory	RNK	Caswell, Rockingham	87 min
Jul 11, 5:55 PM EDT	Areal Flood Warning	RNK	Ashe	3 hr
Jul 11, 6:22 PM EDT	Special Weather Statement	RNK	Stokes	68 min
Jul 11, 7:11 PM EDT	Areal Flood Advisory	RNK	Rockingham, Stokes	98 min

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.