Alert archive / North Carolina / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 88, NWS Blacksburg, VA

July 17, 2021Caswell County, Rockingham County, North Carolina; Pittsylvania County, City of Danville, Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at Jul 17, 2021, 3:48 PM EDT for Caswell County, Rockingham County, North Carolina; Pittsylvania County, City of Danville, 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: Jul 17, 2021, 3:48 PM EDT (19:48 UTC)
Expired: Jul 17, 2021, 4:45 PM EDT
In force: 57 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

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

The radar

The Roanoke radar (KFCX), 91 km from the middle of the area, began a volume at 19:51 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 17, 4:00 PM EDT	TSTM WND DMG	2 Nnw Westover Hills, VA	2 TREES DOWN. VIA SOCIAL MEDIA.
Jul 17, 4:00 PM EDT	HAIL 1	2 Nnw Westover Hills, VA	VIA SOCIAL MEDIA.

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

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 7.8 hours before the alert went out and 70 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: 966 J/kg
Mixed-layer CIN: -78 J/kg
Mixed-layer LCL: 843 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 12 m²/s²
0-3 km storm-relative helicity: 19 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

555 
WUUS51 KRNK 171948
SVRRNK
NCC033-157-VAC143-590-172045-
/O.NEW.KRNK.SV.W.0088.210717T1948Z-210717T2045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service BLACKSBURG VA
348 PM EDT Sat Jul 17 2021

The National Weather Service in BLACKSBURG has issued a

* Severe Thunderstorm Warning for...
  Northeastern Rockingham County in north central North Carolina...
  Northern Caswell County in north central North Carolina...
  The City of Danville in south central Virginia...
  South central Pittsylvania County in south central Virginia...

* Until 445 PM EDT.

* At 348 PM EDT, a severe thunderstorm was located over Mayfield,
  moving northeast at 15 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Danville...
  Bethel...
  Providence...
  Mayfield...
  Blairs...
  Milton...
  and Dry Fork.

This includes The following Location Danville Airport.
 
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.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

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 7971 3680 7936 3662 7920 3654 7922
      3654 7914 3642 7958
TIME...MOT...LOC 1948Z 236DEG 15KT 3651 7956 

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

RR

3 follow-up statements

366 
WWUS51 KRNK 172005
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
405 PM EDT Sat Jul 17 2021

NCC033-157-VAC143-590-172045-
/O.CON.KRNK.SV.W.0088.000000T0000Z-210717T2045Z/
Rockingham NC-Caswell NC-City of Danville VA-Pittsylvania VA-
405 PM EDT Sat Jul 17 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM EDT
FOR
NORTHEASTERN ROCKINGHAM...NORTHERN CASWELL AND SOUTH CENTRAL
PITTSYLVANIA COUNTIES AND THE CITY OF DANVILLE...

At 405 PM EDT, a severe thunderstorm was located near Pelham, or near
Danville, moving northeast at 15 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Danville...
Bethel...
Providence...
Mayfield...
Blairs...
Milton...
and Dry Fork.

This includes The following Location Danville Airport.
 
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.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

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 7936 3662 7920 3654 7922 3654 7914
      3642 7958 3648 7965 3664 7957
TIME...MOT...LOC 2005Z 236DEG 15KT 3655 7949 

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

RR

461 
WWUS51 KRNK 172020
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
420 PM EDT Sat Jul 17 2021

NCC033-157-VAC143-590-172045-
/O.CON.KRNK.SV.W.0088.000000T0000Z-210717T2045Z/
Rockingham NC-Caswell NC-City of Danville VA-Pittsylvania VA-
420 PM EDT Sat Jul 17 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM EDT
FOR
NORTHEASTERN ROCKINGHAM...NORTHERN CASWELL AND SOUTH CENTRAL
PITTSYLVANIA COUNTIES AND THE CITY OF DANVILLE...

At 419 PM EDT, a severe thunderstorm was located over Danville,
moving northeast at 15 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Danville...
Bethel...
Providence...
Mayfield...
Blairs...
Milton...
and Blanch.

This includes The following Location Danville Airport.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for DAMAGING WINDS, as well as deadly cloud to
ground lightning. For your safety, move to an interior room on the
lowest floor of a sturdy building. Stay away from windows.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

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 7936 3662 7920 3654 7922 3654 7914
      3642 7958 3645 7962 3668 7947
TIME...MOT...LOC 2019Z 236DEG 15KT 3658 7943 

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

RR

533 
WWUS51 KRNK 172036
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
436 PM EDT Sat Jul 17 2021

NCC033-157-VAC143-590-172045-
/O.EXP.KRNK.SV.W.0088.000000T0000Z-210717T2045Z/
Rockingham NC-Caswell NC-City of Danville VA-Pittsylvania VA-
436 PM EDT Sat Jul 17 2021

...THE SEVERE THUNDERSTORM WARNING FOR 
NORTHEASTERN ROCKINGHAM...NORTHERN CASWELL AND SOUTH CENTRAL
PITTSYLVANIA COUNTIES AND THE CITY OF DANVILLE WILL EXPIRE AT 445 PM
EDT...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning will be allowed to expire. 
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 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.

Remember, a Severe Thunderstorm Warning still remains in effect for
Rockingham and Casewell counties.

LAT...LON 3680 7936 3662 7920 3654 7922 3654 7914
      3642 7958 3645 7962 3668 7947
TIME...MOT...LOC 2035Z 236DEG 15KT 3661 7937 

$$

RR

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 17, 1:06 PM EDT	Special Weather Statement	RNK	Surry	39 min
Jul 17, 1:45 PM EDT	Severe Thunderstorm Warning	RNK	Surry	43 min
Jul 17, 2:11 PM EDT	Areal Flood Advisory	RNK	Surry	3 hr
Jul 17, 2:49 PM EDT	Special Weather Statement	RNK	Caswell	26 min
Jul 17, 2:56 PM EDT	Severe Thunderstorm Warning	RNK	Caswell, Rockingham	49 min
Jul 17, 3:42 PM EDT	Special Weather Statement	RNK	Caswell, Rockingham	48 min
Jul 17, 3:52 PM EDT	Areal Flood Advisory	RNK	Caswell, Rockingham	3 hr
Jul 17, 4:00 PM EDT	Severe Thunderstorm Warning	RNK	Caswell, Rockingham	60 min
Jul 17, 4:11 PM EDT	Flash Flood Warning	RNK	Caswell, Rockingham	3 hr
Jul 17, 5:00 PM EDT	Severe Thunderstorm Warning	RNK	Caswell, Rockingham	60 min
Jul 17, 5:10 PM EDT	Special Weather Statement	RNK	Wilkes	35 min
Jul 17, 5:39 PM EDT	Special Weather Statement	RNK	Wilkes	36 min
Jul 17, 6:02 PM EDT	Special Weather Statement	RNK	Caswell	13 min
Jul 17, 6:08 PM EDT	Special Weather Statement	RNK	Alleghany, Surry, Watauga, Wilkes	67 min
Jul 17, 6:50 PM EDT	Areal Flood Advisory	RNK	Caswell, Rockingham	7 hr
Jul 17, 7:05 PM EDT	Special Weather Statement	RNK	Alleghany, Surry	40 min
Jul 17, 7:10 PM EDT	Areal Flood Advisory	RNK	Alleghany, Surry	3 hr
Jul 17, 7:34 PM EDT	Special Weather Statement	RNK	Yadkin	26 min
Jul 17, 7:44 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Rockingham, Stokes, Surry, Wilkes, Yadkin	61 min
Jul 16, 8:21 PM EDT	Special Weather Statement	RNK	Wythe	24 min
Jul 17, 12:01 PM EDT	Special Weather Statement	RNK	Bedford, Franklin	29 min
Jul 17, 12:26 PM EDT	Severe Thunderstorm Warning	RNK	Franklin	49 min
Jul 17, 12:47 PM EDT	Special Weather Statement	RNK	Bedford	28 min
Jul 17, 1:20 PM EDT	Special Weather Statement	RNK	Franklin	25 min
Jul 17, 1:33 PM EDT	Special Weather Statement	RNK	Bedford	42 min
Jul 17, 1:38 PM EDT	Special Weather Statement	RNK	Carroll	37 min
Jul 17, 1:43 PM EDT	Special Weather Statement	RNK	Campbell	47 min
Jul 17, 1:56 PM EDT	Severe Thunderstorm Warning	RNK	Amherst, Appomattox, Campbell, City of Lynchburg	64 min
Jul 17, 2:14 PM EDT	Areal Flood Advisory	RNK	Appomattox, Campbell	3 hr
Jul 17, 2:37 PM EDT	Severe Thunderstorm Warning	RNK	Appomattox, Campbell, Charlotte	53 min
Jul 17, 2:45 PM EDT	Special Weather Statement	RNK	Patrick	30 min
Jul 17, 2:47 PM EDT	Special Weather Statement	RNK	City of Martinsville	28 min
Jul 17, 2:53 PM EDT	Severe Thunderstorm Warning	RNK	Franklin, Henry, Pittsylvania, City of Martinsville	36 min
Jul 17, 2:59 PM EDT	Special Weather Statement	RNK	Franklin	31 min
Jul 17, 3:00 PM EDT	Special Weather Statement	RNK	Prince Edward	15 min
Jul 17, 3:16 PM EDT	Areal Flood Advisory	RNK	Franklin	2 hr
Jul 17, 3:24 PM EDT	Special Weather Statement	RNK	Franklin	36 min
Jul 17, 3:27 PM EDT	Special Weather Statement	RNK	Tazewell	48 min
Jul 17, 3:54 PM EDT	Special Weather Statement	RNK	Halifax	36 min
Jul 17, 4:17 PM EDT	Special Weather Statement	RNK	Bland, Giles, Smyth, Tazewell	43 min
Jul 17, 4:22 PM EDT	Special Weather Statement	RNK	Charlotte	23 min
Jul 17, 4:26 PM EDT	Special Weather Statement	RNK	Halifax	34 min
Jul 17, 4:47 PM EDT	Special Weather Statement	RNK	Charlotte	28 min
Jul 17, 5:01 PM EDT	Special Weather Statement	RNK	Alleghany, Bath, Craig, Giles, City of Covington	59 min
Jul 17, 5:26 PM EDT	Special Weather Statement	RNK	Appomattox	34 min
Jul 17, 5:45 PM EDT	Special Weather Statement	RNK	Floyd	30 min
Jul 17, 6:04 PM EDT	Special Weather Statement	RNK	Amherst, Botetourt, Montgomery, Roanoke, Rockbridge, City of Buena Vista and 3 more	56 min
Jul 17, 6:19 PM EDT	Special Weather Statement	RNK	Floyd	26 min
Jul 17, 6:25 PM EDT	Severe Thunderstorm Warning	RNK	Amherst, Bedford, Botetourt, Rockbridge, City of Buena Vista, City of Lexington	65 min
Jul 17, 6:58 PM EDT	Special Weather Statement	RNK	City of Roanoke, City of Salem	47 min
Jul 17, 7:30 PM EDT	Severe Thunderstorm Warning	RNK	Bedford, Campbell, City of Lynchburg	39 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 2021 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.