Alert archive / Virginia / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 37, NWS Blacksburg, VA

May 4, 20215 counties in Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at May 4, 2021, 3:05 PM EDT for 5 counties in Virginia. It was in force for 40 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: May 4, 2021, 3:05 PM EDT (19:05 UTC)
Expired: May 4, 2021, 3:45 PM EDT
In force: 40 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Alleghany County, VA, Amherst County, VA, Botetourt County, VA, City of Lexington, VA, Rockbridge County, VA

The radar

The Roanoke radar (KFCX), 123 km from the middle of the area, began a volume at 19:08 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
May 4, 3:10 PM EDT	HAIL 0.7	1 N Vesuvius, VA	HAIL UP TO DIME SIZE IN DIAMETER.
May 4, 3:30 PM EDT	TSTM WND DMG	1 Nnw Cornwall, VA	SEVERAL 4 INCH DIAMETER TREE BRANCHES DOWN. POWER LINES BLOWN DOWN.

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
May 4, 1:51 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Roanoke, VA (KRNK), launched 12:00Z, 7.1 hours before the alert went out and 70 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: 649 J/kg
Mixed-layer CIN: -120 J/kg
Mixed-layer LCL: 750 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 116 m²/s²
0-3 km storm-relative helicity: 105 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

As transmitted.

423 
WUUS51 KRNK 041905
SVRRNK
VAC005-009-023-163-678-041945-
/O.NEW.KRNK.SV.W.0037.210504T1905Z-210504T1945Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service BLACKSBURG VA
305 PM EDT Tue May 4 2021

The National Weather Service in BLACKSBURG has issued a

* Severe Thunderstorm Warning for...
  East central Alleghany County in west central Virginia...
  The City of Lexington in west central Virginia...
  Rockbridge County in west central Virginia...
  North central Botetourt County in west central Virginia...
  Northeastern Amherst County in central Virginia...

* Until 345 PM EDT.

* At 304 PM EDT, a severe thunderstorm was located over Collierstown,
  moving east at 65 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Lexington...
  Collierstown...
  Rockbridge Baths...
  Cornwall...
  Lowesville...
  Alto...
  and Fairfield.

This includes The following Location VMI.
 
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.

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 3789 7915 3785 7915 3781 7917 3781 7914
      3778 7911 3779 7909 3778 7907 3771 7906
      3770 7898 3770 7927 3778 7933 3763 7968
      3780 7978 3785 7970 3785 7968 3804 7940
TIME...MOT...LOC 1904Z 266DEG 57KT 3774 7958 

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

VFJ

3 follow-up statements

524 
WWUS51 KRNK 041919
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
319 PM EDT Tue May 4 2021

VAC005-023-041928-
/O.CAN.KRNK.SV.W.0037.000000T0000Z-210504T1945Z/
Alleghany VA-Botetourt VA-
319 PM EDT Tue May 4 2021

...THE SEVERE THUNDERSTORM WARNING FOR 
EAST CENTRAL ALLEGHANY AND NORTH CENTRAL BOTETOURT COUNTIES IN WEST
CENTRAL VIRGINIA IS CANCELLED...
    
The severe thunderstorm which prompted the warning has 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, south central and west central Virginia.

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 3789 7915 3785 7915 3781 7917 3781 7914
      3778 7911 3779 7909 3778 7907 3771 7906
      3770 7898 3770 7927 3778 7933 3771 7948
      3783 7954 3801 7936
TIME...MOT...LOC 1918Z 266DEG 57KT 3776 7928 

$$

VAC009-163-678-041945-
/O.CON.KRNK.SV.W.0037.000000T0000Z-210504T1945Z/
City of Lexington VA-Rockbridge VA-Amherst VA-
319 PM EDT Tue May 4 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM EDT
FOR
CENTRAL ROCKBRIDGE AND NORTHEASTERN AMHERST COUNTIES AND THE CITY OF
LEXINGTON...

At 318 PM EDT, a severe thunderstorm was located over Oronoco, or
near Buena Vista, moving east at 65 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...
Lexington...
Rockbridge Baths...
Cornwall...
Lowesville...
Alto...
Fairfield...
and Oronoco.

This includes The following Location VMI.
 
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.

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 3789 7915 3785 7915 3781 7917 3781 7914
      3778 7911 3779 7909 3778 7907 3771 7906
      3770 7898 3770 7927 3778 7933 3771 7948
      3783 7954 3801 7936
TIME...MOT...LOC 1918Z 266DEG 57KT 3776 7928 

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

VFJ

180 
WWUS51 KRNK 041931
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
331 PM EDT Tue May 4 2021

VAC678-041940-
/O.CAN.KRNK.SV.W.0037.000000T0000Z-210504T1945Z/
City of Lexington VA-
331 PM EDT Tue May 4 2021

...THE SEVERE THUNDERSTORM WARNING FOR 
THE CITY OF LEXINGTON IS CANCELLED...
    
The severe thunderstorm which prompted the warning has 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, south central and west central Virginia.

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 3789 7915 3785 7915 3781 7917 3781 7914
      3778 7911 3779 7909 3778 7907 3771 7906
      3770 7898 3770 7927 3778 7933 3778 7938
      3787 7944 3799 7933
TIME...MOT...LOC 1930Z 261DEG 40KT 3779 7925 

$$

VAC009-163-041945-
/O.CON.KRNK.SV.W.0037.000000T0000Z-210504T1945Z/
Rockbridge VA-Amherst VA-
331 PM EDT Tue May 4 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM EDT
FOR
NORTHEASTERN ROCKBRIDGE AND NORTHEASTERN AMHERST COUNTIES...

At 330 PM EDT, a severe thunderstorm was located over Alto, or 7
miles northeast of Buena Vista, moving east at 45 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...
Rockbridge Baths...
Cornwall...
Lowesville...
Alto...
Fairfield...
Oronoco...
and Brownsburg.

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.

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 3789 7915 3785 7915 3781 7917 3781 7914
      3778 7911 3779 7909 3778 7907 3771 7906
      3770 7898 3770 7927 3778 7933 3778 7938
      3787 7944 3799 7933
TIME...MOT...LOC 1930Z 261DEG 40KT 3779 7925 

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

VFJ

080 
WWUS51 KRNK 041939
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
339 PM EDT Tue May 4 2021

VAC009-163-041948-
/O.EXP.KRNK.SV.W.0037.000000T0000Z-210504T1945Z/
Rockbridge VA-Amherst VA-
339 PM EDT Tue May 4 2021

...THE SEVERE THUNDERSTORM WARNING FOR 
NORTHEASTERN ROCKBRIDGE AND NORTHEASTERN AMHERST COUNTIES WILL EXPIRE
AT 345 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.

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

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 3789 7915 3785 7915 3781 7917 3781 7914
      3778 7911 3779 7909 3778 7907 3771 7906
      3770 7898 3770 7927 3778 7933 3778 7938
      3787 7944 3799 7933
TIME...MOT...LOC 1938Z 266DEG 57KT 3780 7909 

$$

VFJ

The office that day

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

Issued	Product	Office	Counties	Lasted
May 4, 12:05 PM EDT	Special Weather Statement	RNK	Grayson, Smyth, Tazewell	25 min
May 4, 12:31 PM EDT	Special Weather Statement	RNK	Bland, Grayson, Smyth, Tazewell, Wythe	29 min
May 4, 1:23 PM EDT	Special Weather Statement	RNK	Rockbridge, City of Buena Vista, City of Lexington	37 min
May 4, 1:30 PM EDT	Special Weather Statement	RNK	Bland, Craig, Floyd, Giles, Montgomery, Pulaski and 4 more	30 min
May 4, 1:41 PM EDT	Severe Thunderstorm Warning	RNK	Carroll, Floyd, Montgomery, Pulaski, City of Radford	49 min
May 4, 1:53 PM EDT	Special Weather Statement	RNK	Alleghany, City of Covington	37 min
May 4, 2:01 PM EDT	Special Weather Statement	RNK	Rockbridge	14 min
May 4, 2:10 PM EDT	Special Weather Statement	RNK	City of Roanoke, City of Salem	35 min
May 4, 2:12 PM EDT	Areal Flood Advisory	RNK	Bedford, Franklin, Montgomery, Roanoke, City of Roanoke, City of Salem	2 hr
May 4, 2:15 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Bath, Botetourt, Rockbridge, City of Lexington	60 min
May 4, 2:22 PM EDT	Severe Thunderstorm Warning	RNK	Bedford, Botetourt, Craig, Floyd, Franklin, Montgomery and 3 more	53 min
May 4, 2:53 PM EDT	Severe Thunderstorm Warning	RNK	Amherst, Bedford, Botetourt, Campbell, Rockbridge, City of Buena Vista and 1 more	67 min
May 4, 3:35 PM EDT	Severe Thunderstorm Warning	RNK	Amherst, Appomattox, Buckingham, Campbell	55 min
May 4, 3:50 PM EDT	Severe Thunderstorm Warning	RNK	Appomattox, Buckingham, Campbell, Charlotte	55 min
May 4, 4:11 PM EDT	Special Weather Statement	RNK	Buckingham	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.