Alert archive / Virginia / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 172, NWS Blacksburg, VA

August 13, 2021Amherst County, Appomattox County, Buckingham County, Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at Aug 13, 2021, 3:59 PM EDT for Amherst County, Appomattox County, Buckingham County, Virginia. It was in force for 61 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 13, 2021, 3:59 PM EDT (19:59 UTC)
Expired: Aug 13, 2021, 5:00 PM EDT
In force: 61 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Amherst County, VA, Appomattox County, VA, Buckingham County, VA

The radar

The Roanoke radar (KFCX), 159 km from the middle of the area, began a volume at 20:00 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 13, 4:04 PM EDT	TSTM WND DMG	1 Nne Bent Creek, VA	A TREE WAS BLOWN DOWN BY THUNDERSTORM WINDS ALONG RIVER ROAD.
Aug 13, 4:04 PM EDT	TSTM WND DMG	2 Wnw Oakville, VA	TREE DOWN ON ROADWAY.

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Aug 13, 1:11 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Roanoke, VA (KRNK), launched 12:00Z, 8.0 hours before the alert went out and 89 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: 1268 J/kg
Mixed-layer CIN: -32 J/kg
Mixed-layer LCL: 822 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: -14 m²/s²
0-3 km storm-relative helicity: 59 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

535 
WUUS51 KRNK 131959
SVRRNK
VAC009-011-029-132100-
/O.NEW.KRNK.SV.W.0172.210813T1959Z-210813T2100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service BLACKSBURG VA
359 PM EDT Fri Aug 13 2021

The National Weather Service in BLACKSBURG has issued a

* Severe Thunderstorm Warning for...
  Northern Appomattox County in central Virginia...
  Buckingham County in central Virginia...
  Southeastern Amherst County in central Virginia...

* Until 500 PM EDT.

* At 359 PM EDT, severe thunderstorms were located along a line
  extending from near Schuyler to near Stonewall, moving east at 35
  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...
  Buckingham...
  Dillwyn...
  Bent Creek...
  New Canton...
  Toga...
  Centenary...
  and Riverville.

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.

Torrential rainfall is occurring with these storms, 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 3763 7825 3739 7843 3743 7902 3760 7893
      3755 7890 3753 7883 3757 7882 3759 7883
      3760 7881 3763 7882 3764 7880 3764 7872
      3770 7869 3768 7864 3772 7865 3775 7863
      3776 7851 3780 7849 3774 7842 3769 7824
TIME...MOT...LOC 1959Z 264DEG 29KT 3787 7871 3745 7893 

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

$$

RR

2 follow-up statements

119 
WWUS51 KRNK 132048
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
448 PM EDT Fri Aug 13 2021

VAC009-011-132058-
/O.CAN.KRNK.SV.W.0172.000000T0000Z-210813T2100Z/
Appomattox VA-Amherst VA-
448 PM EDT Fri Aug 13 2021

...THE SEVERE THUNDERSTORM WARNING FOR 
NORTHERN APPOMATTOX AND SOUTHEASTERN AMHERST COUNTIES IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
central and south central Virginia.

LAT...LON 3747 7837 3753 7874 3759 7883 3760 7881
      3763 7882 3764 7880 3764 7872 3770 7869
      3768 7864 3772 7865 3775 7863 3776 7851
      3780 7849 3774 7842 3769 7824 3763 7825
TIME...MOT...LOC 2048Z 257DEG 24KT 3785 7817 3761 7865 

$$

VAC029-132100-
/O.CON.KRNK.SV.W.0172.000000T0000Z-210813T2100Z/
Buckingham VA-
448 PM EDT Fri Aug 13 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM EDT
FOR
BUCKINGHAM COUNTY...

At 448 PM EDT, severe thunderstorms were located along a line
extending from near Kents Store to near Wingina, moving east 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...
Buckingham...
Dillwyn...
New Canton...
Centenary...
Wingina...
and Gold Hill.

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.

Torrential rainfall is occurring with these storms, 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 3747 7837 3753 7874 3759 7883 3760 7881
      3763 7882 3764 7880 3764 7872 3770 7869
      3768 7864 3772 7865 3775 7863 3776 7851
      3780 7849 3774 7842 3769 7824 3763 7825
TIME...MOT...LOC 2048Z 257DEG 24KT 3785 7817 3761 7865 

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

$$

RR

668 
WWUS51 KRNK 132102
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
502 PM EDT Fri Aug 13 2021

VAC029-132110-
/O.EXP.KRNK.SV.W.0172.000000T0000Z-210813T2100Z/
Buckingham VA-
502 PM EDT Fri Aug 13 2021

...THE SEVERE THUNDERSTORM WARNING FOR 
BUCKINGHAM COUNTY HAS EXPIRED...

The storms which prompted the warning remain in the area and a new 
warning has been issued as this warning has expired. Hail, gusty 
winds and heavy rain are still possible with these thunderstorms.

A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
central and south central Virginia.

Remember, a Severe Thunderstorm Warning still remains in effect!

LAT...LON 3747 7837 3753 7874 3759 7883 3760 7881
      3763 7882 3764 7880 3764 7872 3770 7869
      3768 7864 3772 7865 3775 7863 3776 7851
      3780 7849 3774 7842 3769 7824 3763 7825
TIME...MOT...LOC 2100Z 264DEG 29KT 3786 7806 3762 7854 

$$

RR

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 13, 12:02 PM EDT	Special Weather Statement	RNK	Henry	28 min
Aug 13, 12:21 PM EDT	Special Weather Statement	RNK	City of Roanoke, City of Salem	24 min
Aug 13, 12:31 PM EDT	Special Weather Statement	RNK	Roanoke, City of Salem	29 min
Aug 13, 12:40 PM EDT	Severe Thunderstorm Warning	RNK	Botetourt, Montgomery, Roanoke, City of Roanoke, City of Salem	65 min
Aug 13, 12:51 PM EDT	Special Weather Statement	RNK	Pulaski	24 min
Aug 13, 12:56 PM EDT	Special Weather Statement	RNK	Bath	34 min
Aug 13, 1:06 PM EDT	Special Weather Statement	RNK	Botetourt	24 min
Aug 13, 1:13 PM EDT	Special Weather Statement	RNK	City of Radford	32 min
Aug 13, 1:23 PM EDT	Special Weather Statement	RNK	Botetourt	37 min
Aug 13, 1:31 PM EDT	Special Weather Statement	RNK	Bath	29 min
Aug 13, 1:34 PM EDT	Special Weather Statement	RNK	Roanoke	26 min
Aug 13, 1:45 PM EDT	Special Weather Statement	RNK	Bath	30 min
Aug 13, 1:52 PM EDT	Special Weather Statement	RNK	Montgomery	23 min
Aug 13, 1:59 PM EDT	Special Weather Statement	RNK	Charlotte	31 min
Aug 13, 2:02 PM EDT	Special Weather Statement	RNK	Floyd	28 min
Aug 13, 2:13 PM EDT	Special Weather Statement	RNK	Franklin	32 min
Aug 13, 2:15 PM EDT	Special Weather Statement	RNK	Amherst	30 min
Aug 13, 2:20 PM EDT	Special Weather Statement	RNK	Rockbridge	25 min
Aug 13, 2:21 PM EDT	Special Weather Statement	RNK	Grayson	24 min
Aug 13, 2:25 PM EDT	Special Weather Statement	RNK	Giles	35 min
Aug 13, 2:28 PM EDT	Special Weather Statement	RNK	Pittsylvania	32 min
Aug 13, 2:36 PM EDT	Severe Thunderstorm Warning	RNK	Rockbridge	29 min
Aug 13, 2:40 PM EDT	Special Weather Statement	RNK	Tazewell	35 min
Aug 13, 2:56 PM EDT	Special Weather Statement	RNK	City of Roanoke	34 min
Aug 13, 2:58 PM EDT	Special Weather Statement	RNK	Amherst	32 min
Aug 13, 2:58 PM EDT	Special Weather Statement	RNK	Pittsylvania	32 min
Aug 13, 3:03 PM EDT	Special Weather Statement	RNK	Giles	27 min
Aug 13, 3:09 PM EDT	Special Weather Statement	RNK	Campbell	36 min
Aug 13, 3:11 PM EDT	Severe Thunderstorm Warning	RNK	Pittsylvania	49 min
Aug 13, 3:45 PM EDT	Special Weather Statement	RNK	Appomattox, Buckingham, Charlotte	60 min
Aug 13, 4:14 PM EDT	Special Weather Statement	RNK	Halifax	31 min
Aug 13, 4:16 PM EDT	Special Weather Statement	RNK	Alleghany, City of Covington	29 min
Aug 13, 4:41 PM EDT	Special Weather Statement	RNK	Alleghany, City of Covington	34 min
Aug 13, 4:55 PM EDT	Severe Thunderstorm Warning	RNK	Buckingham	27 min
Aug 13, 4:57 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Bath, City of Covington	47 min
Aug 13, 5:03 PM EDT	Special Weather Statement	RNK	Montgomery	27 min
Aug 13, 5:11 PM EDT	Severe Thunderstorm Warning	RNK	Montgomery	49 min
Aug 13, 5:16 PM EDT	Special Weather Statement	RNK	Charlotte	14 min
Aug 13, 5:20 PM EDT	Special Weather Statement	RNK	Giles, City of Radford	40 min
Aug 13, 5:31 PM EDT	Special Weather Statement	RNK	Charlotte	14 min
Aug 13, 5:38 PM EDT	Special Weather Statement	RNK	Franklin	52 min
Aug 13, 5:56 PM EDT	Special Weather Statement	RNK	Montgomery, Roanoke	34 min
Aug 13, 5:59 PM EDT	Special Weather Statement	RNK	Giles	31 min
Aug 13, 6:02 PM EDT	Special Weather Statement	RNK	Giles	43 min
Aug 13, 6:20 PM EDT	Special Weather Statement	RNK	Botetourt	25 min
Aug 13, 6:26 PM EDT	Special Weather Statement	RNK	Franklin, Roanoke, City of Roanoke, City of Salem	49 min
Aug 13, 6:45 PM EDT	Special Weather Statement	RNK	Craig	45 min
Aug 13, 6:46 PM EDT	Special Weather Statement	RNK	Craig	29 min
Aug 13, 7:11 PM EDT	Special Weather Statement	RNK	Pittsylvania	34 min
Aug 13, 7:13 PM EDT	Special Weather Statement	RNK	Bedford, Botetourt, Craig	47 min
Aug 13, 7:34 PM EDT	Special Weather Statement	RNK	Tazewell	26 min
Aug 13, 7:34 PM EDT	Special Weather Statement	RNK	Appomattox	26 min
Aug 13, 7:36 PM EDT	Special Weather Statement	RNK	Giles	24 min
Aug 13, 7:43 PM EDT	Special Weather Statement	RNK	Bedford	32 min
Aug 13, 7:56 PM EDT	Special Weather Statement	RNK	Bedford, City of Lynchburg	34 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.