Alert archive / Virginia / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 16, NWS Blacksburg, VA

April 8, 2021Alleghany County, Botetourt County, Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at Apr 8, 2021, 8:23 PM EDT for Alleghany County, Botetourt 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: Apr 8, 2021, 8:23 PM EDT (00:23 UTC)
Expired: Apr 8, 2021, 9:00 PM EDT
In force: 37 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Alleghany County, VA, Botetourt County, VA

The radar

The Roanoke radar (KFCX), 91 km from the middle of the area, began a volume at 00:26 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
Apr 8, 8:30 PM EDT	TSTM WND DMG	Iron Gate, VA	SEVERAL TREES DOWN IN IRON GATE AND ALONG IRON GATE HILL BETWEEN 830 PM -900 PM. SMALL TREE DOWN TOWARDS LEXINGTON.

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, 0.4 hours before the alert went out and 72 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: 423 J/kg
Mixed-layer CIN: -17 J/kg
Mixed-layer LCL: 1179 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 188 m²/s²
0-3 km storm-relative helicity: 314 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 3.8

Open this sounding in Storm Lab

The text

As transmitted.

844 
WUUS51 KRNK 090023
SVRRNK
VAC005-023-090100-
/O.NEW.KRNK.SV.W.0016.210409T0023Z-210409T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service BLACKSBURG VA
823 PM EDT Thu Apr 8 2021

The National Weather Service in BLACKSBURG has issued a

* Severe Thunderstorm Warning for...
  Alleghany County in west central Virginia...
  Northwestern Botetourt County in west central Virginia...

* Until 900 PM EDT.

* At 823 PM EDT, a severe thunderstorm was located near Gala, or near
  Eagle Rock, moving northeast at 5 mph.

  HAZARD...Quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to vehicles is expected.

* Locations impacted include...
  Covington...
  Clifton Forge...
  Oriskany...
  Iron Gate...
  Low Moor...
  Glen Wilton...
  and Longdale Furnace.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail, 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.

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 3788 7981 3789 7975 3785 7969 3787 7967
      3782 7966 3756 7988 3764 8003 3765 8002
      3766 8003 3776 7998 3776 7997 3777 7997
      3790 7990
TIME...MOT...LOC 0023Z 211DEG 6KT 3767 7990 

HAIL...1.00IN
WIND...<50MPH
 
$$

RAB

2 follow-up statements

930 
WWUS51 KRNK 090042
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
842 PM EDT Thu Apr 8 2021

VAC005-023-090100-
/O.CON.KRNK.SV.W.0016.000000T0000Z-210409T0100Z/
Alleghany VA-Botetourt VA-
842 PM EDT Thu Apr 8 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM EDT
FOR ALLEGHANY AND NORTH CENTRAL BOTETOURT COUNTIES IN WEST
CENTRAL VIRGINIA...

At 841 PM EDT, a severe thunderstorm was located over Low Moor, or
near Clifton Forge, moving north at 15 mph.

HAZARD...Quarter size hail.

SOURCE...Radar indicated.

IMPACT...Damage to vehicles is expected.

Locations impacted include...
Clifton Forge...
Iron Gate...
Glen Wilton...
Low Moor...
and Selma.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail, 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.

Very heavy 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 3766 7985 3768 7991 3770 7993 3780 7996
      3790 7990 3788 7981 3789 7975 3786 7971
      3774 7980
TIME...MOT...LOC 0041Z 188DEG 11KT 3779 7987 

HAIL...1.00IN
WIND...<50MPH
 
$$

RAB

307 
WWUS51 KRNK 090055
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
855 PM EDT Thu Apr 8 2021

VAC005-023-090100-
/O.CON.KRNK.SV.W.0016.000000T0000Z-210409T0100Z/
Alleghany VA-Botetourt VA-
855 PM EDT Thu Apr 8 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM EDT
FOR NORTHERN ALLEGHANY AND NORTH CENTRAL BOTETOURT COUNTIES IN WEST
CENTRAL VIRGINIA...

At 855 PM EDT, a severe thunderstorm was located over Selma, or over
Clifton Forge, moving northeast at 5 mph.

HAZARD...Quarter size hail.

SOURCE...Radar indicated.

IMPACT...Damage to vehicles is expected.

Locations impacted include...
Clifton Forge...
Iron Gate...
Glen Wilton...
Low Moor...
and Selma.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for LARGE HAIL. 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 3775 7984 3775 7990 3776 7995 3780 7996
      3790 7990 3788 7981 3789 7975 3786 7971
      3774 7980
TIME...MOT...LOC 0055Z 211DEG 6KT 3781 7985 

HAIL...1.00IN
WIND...<50MPH
 
$$

RAB

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 8, 8:12 PM EDT	Special Weather Statement	RNK	Bath	48 min
Apr 8, 8:38 PM EDT	Special Weather Statement	RNK	Campbell	37 min
Apr 8, 8:48 PM EDT	Severe Thunderstorm Warning	RNK	Bedford, Campbell, City of Lynchburg	27 min
Apr 8, 9:15 PM EDT	Areal Flood Advisory	RNK	Alleghany, Botetourt, Craig	4 hr
Apr 8, 9:15 PM EDT	Special Weather Statement	RNK	Alleghany, Bath, City of Covington	90 min
Apr 8, 9:21 PM EDT	Severe Thunderstorm Warning	RNK	Amherst, Appomattox, Campbell, City of Lynchburg	54 min
Apr 8, 9:27 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Bath, Botetourt, City of Covington	63 min
Apr 8, 9:40 PM EDT	Special Weather Statement	RNK	Bedford, Botetourt	65 min
Apr 8, 10:14 PM EDT	Special Weather Statement	RNK	Campbell	61 min
Apr 8, 10:44 PM EDT	Special Weather Statement	RNK	Buckingham	31 min
Apr 8, 11:55 PM EDT	Special Weather Statement	RNK	City of Lynchburg	35 min
Apr 9, 1:28 PM EDT	Special Weather Statement	RNK	Pulaski	32 min
Apr 9, 1:52 PM EDT	Special Weather Statement	RNK	Bath	23 min
Apr 9, 1:58 PM EDT	Special Weather Statement	RNK	City of Radford	32 min
Apr 9, 2:05 PM EDT	Special Weather Statement	RNK	Alleghany	25 min
Apr 9, 2:09 PM EDT	Severe Thunderstorm Warning	RNK	Bath	51 min
Apr 9, 2:27 PM EDT	Special Weather Statement	RNK	Montgomery, City of Radford	33 min
Apr 9, 2:29 PM EDT	Special Weather Statement	RNK	Pulaski	31 min
Apr 9, 2:50 PM EDT	Special Weather Statement	RNK	Giles	25 min
Apr 9, 2:53 PM EDT	Special Weather Statement	RNK	Alleghany	37 min
Apr 9, 2:55 PM EDT	Severe Thunderstorm Warning	RNK	Floyd	50 min
Apr 9, 3:11 PM EDT	Special Weather Statement	RNK	Carroll	34 min
Apr 9, 3:12 PM EDT	Areal Flood Advisory	RNK	Carroll, Floyd, Grayson, Montgomery, Pulaski, Wythe	3 hr
Apr 9, 3:14 PM EDT	Special Weather Statement	RNK	Craig	31 min
Apr 9, 3:21 PM EDT	Special Weather Statement	RNK	Bath	24 min
Apr 9, 3:31 PM EDT	Severe Thunderstorm Warning	RNK	Floyd, Franklin, Patrick	44 min
Apr 9, 3:40 PM EDT	Special Weather Statement	RNK	Halifax	35 min
Apr 9, 3:56 PM EDT	Severe Thunderstorm Warning	RNK	Franklin	49 min
Apr 9, 4:07 PM EDT	Severe Thunderstorm Warning	RNK	Halifax	23 min
Apr 9, 4:10 PM EDT	Special Weather Statement	RNK	City of Martinsville	35 min
Apr 9, 4:19 PM EDT	Severe Thunderstorm Warning	RNK	Franklin, Henry, Pittsylvania	41 min
Apr 9, 4:31 PM EDT	Severe Thunderstorm Warning	RNK	Halifax	44 min
Apr 9, 4:35 PM EDT	Severe Thunderstorm Warning	RNK	Floyd, Franklin, Patrick	40 min
Apr 9, 4:40 PM EDT	Severe Thunderstorm Warning	RNK	Henry, Pittsylvania	50 min
Apr 9, 5:10 PM EDT	Severe Thunderstorm Warning	RNK	Pittsylvania	36 min
Apr 9, 5:13 PM EDT	Tornado Warning	RNK	Pittsylvania	33 min
Apr 9, 5:27 PM EDT	Tornado Warning	RNK	Halifax, Pittsylvania	48 min
Apr 9, 5:55 PM EDT	Tornado Warning	RNK	Halifax	50 min
Apr 9, 6:00 PM EDT	Special Weather Statement	RNK	City of Martinsville	45 min
Apr 9, 6:16 PM EDT	Special Weather Statement	RNK	Henry, City of Martinsville	44 min
Apr 9, 6:41 PM EDT	Special Weather Statement	RNK	Mecklenburg	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.