Alert archive / Virginia / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 186, NWS Blacksburg, VA

August 22, 20214 counties in Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at Aug 22, 2021, 9:22 PM EDT for 4 counties in Virginia. It was in force for 53 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: Aug 22, 2021, 9:22 PM EDT (01:22 UTC)
Expired: Aug 22, 2021, 10:15 PM EDT
In force: 53 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Appomattox County, VA, Campbell County, VA, Charlotte County, VA, Halifax County, VA

The radar

The Roanoke radar (KFCX), 145 km from the middle of the area, began a volume at 01:21 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
Aug 22, 9:28 PM EDT	TSTM WND DMG	4 Se Spout Spring, VA	TREE REPORTED DOWN AT THE INTERSECTION OF DOUBLE BRIDGES ROAD AND SALEM ROAD.
Aug 22, 9:28 PM EDT	TSTM WND DMG	4 W Evergreen, VA	A TREE DOWN ON A POWERLINE ALONG THE 4300 BLOCK OF PROMISE LAND ROAD.

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 00:00Z, 1.4 hours before the alert went out and 76 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: 124 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 1665 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 19 m²/s²
0-3 km storm-relative helicity: 30 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted.

527 
WUUS51 KRNK 230122
SVRRNK
VAC011-031-037-083-230215-
/O.NEW.KRNK.SV.W.0186.210823T0122Z-210823T0215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service BLACKSBURG VA
922 PM EDT Sun Aug 22 2021

The National Weather Service in BLACKSBURG has issued a

* Severe Thunderstorm Warning for...
  Appomattox County in central Virginia...
  Charlotte County in south central Virginia...
  Eastern Campbell County in central Virginia...
  North central Halifax County in south central Virginia...

* Until 1015 PM EDT.

* At 922 PM EDT, a severe thunderstorm was located near Spring Mills,
  or near Appomattox, moving south at 30 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...
  Appomattox...
  Brookneal...
  Keysville...
  Charlotte Court House...
  Phenix...
  Red House...
  and Concord.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail and 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 3693 7848 3690 7904 3739 7908 3745 7879
      3730 7865 3726 7868 3721 7869 3720 7869
      3719 7864 3717 7863 3714 7859 3715 7855
      3714 7854 3714 7853 3709 7848 3707 7844
TIME...MOT...LOC 0122Z 337DEG 24KT 3728 7889 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

RS

2 follow-up statements

861 
WWUS51 KRNK 230157
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
957 PM EDT Sun Aug 22 2021

VAC011-031-037-083-230215-
/O.CON.KRNK.SV.W.0186.000000T0000Z-210823T0215Z/
Appomattox VA-Charlotte VA-Campbell VA-Halifax VA-
957 PM EDT Sun Aug 22 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1015 PM EDT
FOR
SOUTHWESTERN APPOMATTOX...CHARLOTTE...SOUTHEASTERN CAMPBELL AND NORTH
CENTRAL HALIFAX COUNTIES...

At 955 PM EDT, a severe thunderstorm was located near Red House,
moving south at 15 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Brookneal...
Keysville...
Charlotte Court House...
Phenix...
Red House...
Nathalie...
and Drakes Branch.

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 3693 7848 3690 7904 3727 7900 3733 7885
      3726 7875 3720 7869 3719 7864 3717 7863
      3714 7859 3715 7855 3714 7854 3714 7853
      3709 7848 3707 7844
TIME...MOT...LOC 0155Z 338DEG 14KT 3719 7885 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

RS

265 
WWUS51 KRNK 230217
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
1017 PM EDT Sun Aug 22 2021

VAC011-031-037-083-230226-
/O.EXP.KRNK.SV.W.0186.000000T0000Z-210823T0215Z/
Appomattox VA-Charlotte VA-Campbell VA-Halifax VA-
1017 PM EDT Sun Aug 22 2021

...THE SEVERE THUNDERSTORM WARNING FOR 
SOUTHWESTERN APPOMATTOX...CHARLOTTE...SOUTHEASTERN CAMPBELL AND NORTH
CENTRAL HALIFAX COUNTIES HAS EXPIRED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been allowed to expire.  However heavy
rain is still possible with this thunderstorm.

LAT...LON 3693 7848 3690 7904 3727 7900 3733 7885
      3726 7875 3720 7869 3719 7864 3717 7863
      3714 7859 3715 7855 3714 7854 3714 7853
      3709 7848 3707 7844
TIME...MOT...LOC 0216Z 337DEG 24KT 3707 7878 

$$

PM

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 22, 9:07 PM EDT	Special Weather Statement	RNK	Appomattox	23 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.