Alert archive / Virginia / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 99, NWS Blacksburg, VA

July 18, 2021Charlotte County, Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at Jul 18, 2021, 6:20 PM EDT for Charlotte County, Virginia. It was in force for 40 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 18, 2021, 6:20 PM EDT (22:20 UTC)
Expired: Jul 18, 2021, 7:00 PM EDT
In force: 40 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Charlotte County, VA

The radar

The Norfolk radar (KAKQ), 135 km from the middle of the area, began a volume at 22:22 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, 10.3 hours before the alert went out and 90 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: 63 J/kg
Mixed-layer CIN: -114 J/kg
Mixed-layer LCL: 848 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: -78 m²/s²
0-3 km storm-relative helicity: -38 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

770 
WUUS51 KRNK 182220
SVRRNK
VAC037-182300-
/O.NEW.KRNK.SV.W.0099.210718T2220Z-210718T2300Z/

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

The National Weather Service in BLACKSBURG has issued a

* Severe Thunderstorm Warning for...
  East central Charlotte County in south central Virginia...

* Until 700 PM EDT.

* At 620 PM EDT, a severe thunderstorm was located over Drakes
  Branch, or near Keysville, moving southeast at 15 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...
  Keysville...
  and Drakes Branch.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail and 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 3689 7849 3689 7850 3697 7864 3705 7859
      3703 7846
TIME...MOT...LOC 2220Z 296DEG 12KT 3698 7856 

HAIL...1.00IN
WIND...60MPH
 
$$

DS

2 follow-up statements

607 
WWUS51 KRNK 182233
SVSRNK

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

VAC037-182300-
/O.CON.KRNK.SV.W.0099.000000T0000Z-210718T2300Z/
Charlotte VA-
633 PM EDT Sun Jul 18 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT
FOR EAST CENTRAL CHARLOTTE COUNTY...

At 632 PM EDT, a severe thunderstorm was located near Drakes Branch,
or near Keysville, moving southeast at 15 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

This severe thunderstorm will remain over mainly rural areas of 
east central Charlotte County.

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 3689 7849 3689 7850 3696 7859 3701 7858
      3699 7847
TIME...MOT...LOC 2232Z 297DEG 13KT 3695 7851 

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

DS

159 
WWUS51 KRNK 182252
SVSRNK

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

VAC037-182301-
/O.EXP.KRNK.SV.W.0099.000000T0000Z-210718T2300Z/
Charlotte VA-
652 PM EDT Sun Jul 18 2021

...THE SEVERE THUNDERSTORM WARNING FOR 
EAST CENTRAL CHARLOTTE COUNTY WILL EXPIRE AT 700 PM EDT...
        
The storm which prompted the warning has moved out of the 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 3689 7849 3689 7850 3696 7859 3701 7858
      3699 7847
TIME...MOT...LOC 2251Z 296DEG 12KT 3693 7845 

$$

SH

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, 3:53 PM EDT	Severe Thunderstorm Warning	RNK	Henry, Patrick	37 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

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.