Alert archive / Virginia / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 98, NWS Blacksburg, VA

July 18, 2021Henry County, Patrick County, Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at Jul 18, 2021, 3:53 PM EDT for Henry County, Patrick County, Virginia. It was in force for 37 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 18, 2021, 3:53 PM EDT (19:53 UTC)
Expired: Jul 18, 2021, 4:30 PM EDT
In force: 37 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Henry County, VA, Patrick County, VA

The radar

The Roanoke radar (KFCX), 51 km from the middle of the area, began a volume at 19:57 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 18, 3:57 PM EDT	TSTM WND DMG	1 Nnw Penns Store, VA	TREE DOWN ON STELLA ROAD.

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, 7.9 hours before the alert went out and 60 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: 510 J/kg
Mixed-layer CIN: -45 J/kg
Mixed-layer LCL: 982 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 16 m²/s²
0-3 km storm-relative helicity: 39 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

247 
WUUS51 KRNK 181953
SVRRNK
VAC089-141-182030-
/O.NEW.KRNK.SV.W.0098.210718T1953Z-210718T2030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service BLACKSBURG VA
353 PM EDT Sun Jul 18 2021

The National Weather Service in BLACKSBURG has issued a

* Severe Thunderstorm Warning for...
  Southwestern Henry County in south central Virginia...
  Southeastern Patrick County in southwestern Virginia...

* Until 430 PM EDT.

* At 353 PM EDT, a severe thunderstorm was located over Penns Store,
  or over Spencer, moving east at 10 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Spencer...
  Penns Store...
  and Horse Pasture.

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.

Locally heavy rain will quickly reduce visibility and result in
ponding of water on roadways, standing water in low lying areas, and
minor flooding of creeks, streams, and areas of poor drainage.
Drivers are urged to slow down and use extra caution to avoid
hydroplaning.

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 3655 8000 3657 8016 3668 8012 3669 7995
TIME...MOT...LOC 1953Z 252DEG 10KT 3663 8005 

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

DS

2 follow-up statements

745 
WWUS51 KRNK 182012
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
412 PM EDT Sun Jul 18 2021

VAC089-141-182030-
/O.CON.KRNK.SV.W.0098.000000T0000Z-210718T2030Z/
Henry VA-Patrick VA-
412 PM EDT Sun Jul 18 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM EDT
FOR SOUTHWESTERN HENRY AND SOUTHEASTERN PATRICK COUNTIES...

At 411 PM EDT, a severe thunderstorm was located over Spencer, moving
southeast at 10 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Spencer...
Penns Store...
and Horse Pasture.

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.

Locally heavy rain will quickly reduce visibility and result in
ponding of water on roadways, standing water in low lying areas, and
minor flooding of creeks, streams, and areas of poor drainage.
Drivers are urged to slow down and use extra caution to avoid
hydroplaning.

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 3655 8000 3657 8016 3661 8015 3662 8007
      3669 7995
TIME...MOT...LOC 2011Z 321DEG 9KT 3659 8003 

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

DS

203 
WWUS51 KRNK 182025
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
425 PM EDT Sun Jul 18 2021

VAC089-141-182034-
/O.EXP.KRNK.SV.W.0098.000000T0000Z-210718T2030Z/
Henry VA-Patrick VA-
425 PM EDT Sun Jul 18 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN HENRY AND 
SOUTHEASTERN PATRICK COUNTIES WILL EXPIRE AT 430 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 3655 8000 3657 8016 3661 8015 3662 8007
      3669 7995
TIME...MOT...LOC 2024Z 252DEG 10KT 3660 7999 

$$

DS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 17, 8:14 PM EDT	Severe Thunderstorm Warning	RNK	Henry, Pittsylvania, City of Martinsville	41 min
Jul 17, 8:42 PM EDT	Severe Thunderstorm Warning	RNK	Henry	63 min
Jul 17, 8:54 PM EDT	Special Weather Statement	RNK	Tazewell	36 min
Jul 17, 10:04 PM EDT	Severe Thunderstorm Warning	RNK	Charlotte, Halifax, Pittsylvania	56 min
Jul 17, 10:29 PM EDT	Special Weather Statement	RNK	Bland, Giles, Tazewell	31 min
Jul 18, 2:52 PM EDT	Special Weather Statement	RNK	Patrick	23 min
Jul 18, 3:05 PM EDT	Special Weather Statement	RNK	City of Martinsville	25 min
Jul 18, 3:20 PM EDT	Areal Flood Advisory	RNK	Carroll	83 min
Jul 18, 3:24 PM EDT	Areal Flood Advisory	RNK	Carroll	3 hr
Jul 18, 3:29 PM EDT	Special Weather Statement	RNK	Smyth	31 min
Jul 18, 3:33 PM EDT	Special Weather Statement	RNK	City of Danville	27 min
Jul 18, 4:03 PM EDT	Special Weather Statement	RNK	Smyth	27 min
Jul 18, 4:05 PM EDT	Special Weather Statement	RNK	City of Danville	25 min
Jul 18, 4:09 PM EDT	Special Weather Statement	RNK	Patrick	36 min
Jul 18, 4:12 PM EDT	Areal Flood Advisory	RNK	Carroll, Grayson, City of Galax	112 min
Jul 18, 4:19 PM EDT	Special Weather Statement	RNK	City of Galax	26 min
Jul 18, 4:23 PM EDT	Special Weather Statement	RNK	Henry	37 min
Jul 18, 4:43 PM EDT	Flash Flood Warning	RNK	Carroll	4 hr
Jul 18, 5:11 PM EDT	Special Weather Statement	RNK	Carroll	34 min
Jul 18, 5:38 PM EDT	Special Weather Statement	RNK	Charlotte	37 min
Jul 18, 6:20 PM EDT	Severe Thunderstorm Warning	RNK	Charlotte	40 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.