Alert archive / Virginia / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 200, NWS Blacksburg, VA

August 29, 2021Alleghany County, Botetourt County, Craig County, Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at Aug 29, 2021, 4:42 PM EDT for Alleghany County, Botetourt County, Craig County, Virginia. It was in force for 44 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: Aug 29, 2021, 4:42 PM EDT (20:42 UTC)
Expired: Aug 29, 2021, 5:26 PM EDT
In force: 44 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Alleghany County, VA, Botetourt County, VA, Craig County, VA

The radar

The Roanoke radar (KFCX), 71 km from the middle of the area, began a volume at 20:41 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 29, 4:49 PM EDT	TSTM WND DMG	4 W Gala, VA	A LARGE TREE WAS BLOWN DOWN BY THUNDERSTORM WINDS NEAR THE INTERSECTION OF CRAIGS CREEK ROAD AND ROARING RUN 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 12:00Z, 8.7 hours before the alert went out and 67 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: 406 J/kg
Mixed-layer CIN: -126 J/kg
Mixed-layer LCL: 866 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 89 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

095 
WUUS51 KRNK 292042
SVRRNK
VAC005-023-045-292145-
/O.NEW.KRNK.SV.W.0200.210829T2042Z-210829T2145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service BLACKSBURG VA
442 PM EDT Sun Aug 29 2021

The National Weather Service in BLACKSBURG has issued a

* Severe Thunderstorm Warning for...
  South central Alleghany County in west central Virginia...
  Northeastern Craig County in southwestern Virginia...
  Northwestern Botetourt County in west central Virginia...

* Until 545 PM EDT.

* At 442 PM EDT, a severe thunderstorm was located over Jordan Mines,
  moving east at 5 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...
  Jordan Mines...
  Oriskany...
  and Gala.

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 3762 8018 3770 8013 3771 7981 3750 7989
TIME...MOT...LOC 2042Z 276DEG 5KT 3765 8010 

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

$$

VFJ

2 follow-up statements

452 
WWUS51 KRNK 292104
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
504 PM EDT Sun Aug 29 2021

VAC005-023-045-292145-
/O.CON.KRNK.SV.W.0200.000000T0000Z-210829T2145Z/
Alleghany VA-Craig VA-Botetourt VA-
504 PM EDT Sun Aug 29 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR
SOUTH CENTRAL ALLEGHANY COUNTY IN WEST CENTRAL VIRGINIA...
NORTHEASTERN CRAIG COUNTY IN SOUTHWESTERN VIRGINIA AND NORTHWESTERN
BOTETOURT COUNTIES IN WEST CENTRAL VIRGINIA...

At 504 PM EDT, a severe thunderstorm was located near Jordan Mines,
moving east at 5 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...
Jordan Mines...
Oriskany...
and Gala.

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 3762 8018 3770 8013 3771 7981 3750 7989
TIME...MOT...LOC 2104Z 276DEG 5KT 3765 8006 

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

$$

VFJ

469 
WWUS51 KRNK 292126
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
526 PM EDT Sun Aug 29 2021

VAC005-023-045-292136-
/O.CAN.KRNK.SV.W.0200.000000T0000Z-210829T2145Z/
Alleghany VA-Craig VA-Botetourt VA-
526 PM EDT Sun Aug 29 2021

...THE SEVERE THUNDERSTORM WARNING FOR 
SOUTH CENTRAL ALLEGHANY COUNTY IN WEST CENTRAL VIRGINIA...
NORTHEASTERN CRAIG COUNTY IN SOUTHWESTERN VIRGINIA AND NORTHWESTERN
BOTETOURT COUNTIES IN WEST CENTRAL VIRGINIA IS CANCELLED...
                
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 cancelled.  However heavy rain is
still possible with this thunderstorm.

LAT...LON 3762 8018 3770 8013 3771 7981 3750 7989
TIME...MOT...LOC 2125Z 276DEG 5KT 3765 8002 

$$

VFJ

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 28, 9:01 PM EDT	Special Weather Statement	RNK	Rockbridge	29 min
Aug 28, 9:33 PM EDT	Special Weather Statement	RNK	City of Buena Vista	42 min
Aug 28, 10:22 PM EDT	Special Weather Statement	RNK	Buckingham	38 min
Aug 28, 10:28 PM EDT	Special Weather Statement	RNK	City of Buena Vista	32 min
Aug 28, 10:57 PM EDT	Special Weather Statement	RNK	Rockbridge	33 min
Aug 28, 11:05 PM EDT	Areal Flood Advisory	RNK	Rockbridge	3 hr
Aug 28, 11:09 PM EDT	Special Weather Statement	RNK	Buckingham	36 min
Aug 28, 11:11 PM EDT	Special Weather Statement	RNK	Buckingham	49 min
Aug 28, 11:27 PM EDT	Special Weather Statement	RNK	Rockbridge	48 min
Aug 28, 11:30 PM EDT	Special Weather Statement	RNK	Appomattox	30 min
Aug 28, 11:38 PM EDT	Areal Flood Advisory	RNK	Rockbridge	3 hr
Aug 28, 11:44 PM EDT	Severe Thunderstorm Warning	RNK	Amherst, Rockbridge	43 min
Aug 28, 11:49 PM EDT	Flash Flood Warning	RNK	Amherst, Rockbridge	6 hr
Aug 28, 11:51 PM EDT	Special Weather Statement	RNK	Amherst	24 min
Aug 29, 12:02 AM EDT	Special Weather Statement	RNK	Appomattox	43 min
Aug 29, 12:05 AM EDT	Special Weather Statement	RNK	Buckingham	40 min
Aug 29, 12:07 AM EDT	Severe Thunderstorm Warning	RNK	Amherst, Appomattox, Buckingham	53 min
Aug 29, 12:23 AM EDT	Special Weather Statement	RNK	Amherst	37 min
Aug 29, 12:30 AM EDT	Severe Thunderstorm Warning	RNK	Amherst, Bedford	60 min
Aug 29, 12:39 AM EDT	Areal Flood Advisory	RNK	Amherst, Appomattox, Bedford	3 hr
Aug 29, 12:59 AM EDT	Severe Thunderstorm Warning	RNK	Amherst, Appomattox	61 min
Aug 29, 1:41 AM EDT	Special Weather Statement	RNK	Appomattox	34 min
Aug 29, 2:00 PM EDT	Special Weather Statement	RNK	Bath	30 min
Aug 29, 2:18 PM EDT	Special Weather Statement	RNK	Bath	27 min
Aug 29, 2:21 PM EDT	Special Weather Statement	RNK	Alleghany	24 min
Aug 29, 2:50 PM EDT	Severe Thunderstorm Warning	RNK	Bath, Rockbridge	55 min
Aug 29, 3:23 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Bath, Botetourt	67 min
Aug 29, 3:39 PM EDT	Severe Thunderstorm Warning	RNK	Bath, Rockbridge	51 min
Aug 29, 3:48 PM EDT	Special Weather Statement	RNK	Alleghany, City of Covington	27 min
Aug 29, 4:01 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Botetourt, City of Covington	44 min
Aug 29, 4:19 PM EDT	Special Weather Statement	RNK	Rockbridge, City of Lexington	26 min
Aug 29, 4:33 PM EDT	Special Weather Statement	RNK	City of Covington	27 min
Aug 29, 5:24 PM EDT	Special Weather Statement	RNK	Giles	36 min
Aug 29, 5:30 PM EDT	Special Weather Statement	RNK	Montgomery	30 min
Aug 29, 6:03 PM EDT	Special Weather Statement	RNK	Montgomery	27 min
Aug 29, 6:11 PM EDT	Special Weather Statement	RNK	Giles	19 min
Aug 29, 6:17 PM EDT	Special Weather Statement	RNK	Giles	28 min
Aug 29, 6:41 PM EDT	Special Weather Statement	RNK	Montgomery, City of Radford	34 min
Aug 29, 6:42 PM EDT	Special Weather Statement	RNK	City of Roanoke, City of Salem	33 min
Aug 29, 6:57 PM EDT	Areal Flood Advisory	RNK	Montgomery	3 hr
Aug 29, 7:02 PM EDT	Severe Thunderstorm Warning	RNK	Giles	27 min
Aug 29, 7:03 PM EDT	Areal Flood Advisory	RNK	Roanoke, City of Roanoke, City of Salem	117 min
Aug 29, 7:16 PM EDT	Special Weather Statement	RNK	Floyd, Montgomery, Roanoke, City of Roanoke, City of Salem	44 min
Aug 29, 7:40 PM EDT	Special Weather Statement	RNK	Alleghany, City of Covington	35 min
Aug 29, 7:55 PM EDT	Special Weather Statement	RNK	Floyd	35 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.