Alert archive / Virginia / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 75, NWS Blacksburg, VA

July 11, 2021Halifax County, Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at Jul 11, 2021, 11:43 AM EDT for Halifax County, Virginia. It was in force for 62 min. 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 11, 2021, 11:43 AM EDT (15:43 UTC)
Expired: Jul 11, 2021, 12:45 PM EDT
In force: 62 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Halifax County, VA

The radar

The Roanoke radar (KFCX), 134 km from the middle of the area, began a volume at 15:41 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, 3.7 hours before the alert went out and 75 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.

890 
WUUS51 KRNK 111543
SVRRNK
VAC083-111645-
/O.NEW.KRNK.SV.W.0075.210711T1543Z-210711T1645Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service BLACKSBURG VA
1143 AM EDT Sun Jul 11 2021

The National Weather Service in BLACKSBURG has issued a

* Severe Thunderstorm Warning for...
  Central Halifax County in south central Virginia...

* Until 1245 PM EDT.

* At 1142 AM EDT, a severe thunderstorm was located near Cluster
  Springs, or near Turbeville, 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...
  Halifax...
  Clover...
  Turbeville...
  Scottsburg...
  Mt Laurel...
  and Cluster Springs.

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 3680 7868 3677 7867 3654 7890 3654 7896
      3662 7911 3699 7887 3698 7882 3695 7879
      3695 7878 3698 7877 3699 7875 3700 7876
      3699 7874 3694 7873 3692 7875 3685 7867
      3683 7869 3681 7867
TIME...MOT...LOC 1542Z 213DEG 18KT 3664 7897 

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

RR

4 follow-up statements

713 
WWUS51 KRNK 111600
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
1200 PM EDT Sun Jul 11 2021

VAC083-111645-
/O.CON.KRNK.SV.W.0075.000000T0000Z-210711T1645Z/
Halifax VA-
1200 PM EDT Sun Jul 11 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1245 PM EDT
FOR
CENTRAL HALIFAX COUNTY...

At 1200 PM EDT, a severe thunderstorm was located over South Boston,
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...
Halifax...
Clover...
Scottsburg...
Mt Laurel...
Cluster Springs...
and Crystal Hill.

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 3680 7868 3677 7867 3660 7884 3658 7889
      3664 7903 3669 7906 3699 7887 3698 7882
      3695 7879 3695 7878 3698 7877 3699 7875
      3700 7876 3699 7874 3694 7873 3692 7875
      3685 7867 3683 7869 3681 7867
TIME...MOT...LOC 1600Z 213DEG 18KT 3672 7891 

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

RR

396 
WWUS51 KRNK 111610
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
1210 PM EDT Sun Jul 11 2021

VAC083-111645-
/O.CON.KRNK.SV.W.0075.000000T0000Z-210711T1645Z/
Halifax VA-
1210 PM EDT Sun Jul 11 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1245 PM EDT
FOR
CENTRAL HALIFAX COUNTY...

At 1210 PM EDT, a severe thunderstorm was located near Halifax,
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...
Halifax...
Clover...
Scottsburg...
Mt Laurel...
Crystal Hill...
and Dryburg.

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 3680 7868 3677 7867 3664 7880 3666 7893
      3672 7898 3677 7901 3699 7887 3698 7882
      3695 7879 3695 7878 3698 7877 3699 7875
      3700 7876 3699 7874 3694 7873 3692 7875
      3685 7867 3683 7869 3681 7867
TIME...MOT...LOC 1610Z 213DEG 18KT 3676 7887 

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

RR

712 
WWUS51 KRNK 111625
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
1225 PM EDT Sun Jul 11 2021

VAC083-111645-
/O.CON.KRNK.SV.W.0075.000000T0000Z-210711T1645Z/
Halifax VA-
1225 PM EDT Sun Jul 11 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1245 PM EDT
FOR
CENTRAL HALIFAX COUNTY...

At 1225 PM EDT, a severe thunderstorm was located near Mt Laurel, or
near Clover, moving northeast at 20 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Clover...
Scottsburg...
Mt Laurel...
Crystal Hill...
and Dryburg.

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 3680 7868 3677 7867 3666 7878 3674 7886
      3680 7891 3684 7897 3699 7887 3698 7882
      3695 7879 3695 7878 3698 7877 3699 7875
      3700 7876 3699 7874 3694 7873 3692 7875
      3685 7867 3683 7869 3681 7867
TIME...MOT...LOC 1625Z 213DEG 18KT 3683 7882 

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

RR

755 
WWUS51 KRNK 111640
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
1240 PM EDT Sun Jul 11 2021

VAC083-111650-
/O.EXP.KRNK.SV.W.0075.000000T0000Z-210711T1645Z/
Halifax VA-
1240 PM EDT Sun Jul 11 2021

...THE SEVERE THUNDERSTORM WARNING FOR 
CENTRAL HALIFAX COUNTY WILL EXPIRE AT 1245 PM EDT...
        
The storm which prompted the warning has weakened below severe
limits, and has 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 3680 7868 3677 7867 3666 7878 3674 7886
      3680 7891 3684 7897 3699 7887 3698 7882
      3695 7879 3695 7878 3698 7877 3699 7875
      3700 7876 3699 7874 3694 7873 3692 7875
      3685 7867 3683 7869 3681 7867
TIME...MOT...LOC 1640Z 213DEG 18KT 3689 7877 

$$

RR

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, 11:53 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, 1:38 PM EDT	Severe Thunderstorm Warning	RNK	Campbell, Halifax, Pittsylvania	67 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

Nearby

Severe Thunderstorm Warnings in Virginia, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.