Alert archive / Virginia / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 220, NWS Blacksburg, VA

December 11, 20216 counties in Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at Dec 11, 2021, 1:03 PM EST for 6 counties in Virginia. It was in force for 40 min. 3 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: Dec 11, 2021, 1:03 PM EST (18:03 UTC)
Expired: Dec 11, 2021, 1:43 PM EST
In force: 40 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Bland County, VA, City of Radford, VA, Giles County, VA, Montgomery County, VA, Pulaski County, VA, Wythe County, VA

The radar

The Roanoke radar (KFCX), 21 km from the middle of the area, began a volume at 18:06 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
Dec 11, 1:09 PM EST	TSTM WND DMG	1 E White Gate, VA	TREE DOWN ON ROAD.
Dec 11, 1:11 PM EST	TSTM WND DMG	1 Nw Bane, VA	TREE DOWN ON ROAD.
Dec 11, 1:34 PM EST	TSTM WND DMG	5 Ne Draper, VA	TREES DOWN ON 5 TO 10 ROADS AROUND THIS POINT.

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, 6.1 hours before the alert went out and 87 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 856 m above ground
0-6 km bulk shear: 66 kt
0-1 km storm-relative helicity: 267 m²/s²
0-3 km storm-relative helicity: 286 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

227 
WUUS51 KRNK 111803
SVRRNK
VAC021-071-121-155-197-750-111900-
/O.NEW.KRNK.SV.W.0220.211211T1803Z-211211T1900Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service BLACKSBURG VA
103 PM EST Sat Dec 11 2021

The National Weather Service in BLACKSBURG has issued a

* Severe Thunderstorm Warning for...
  Pulaski County in southwestern Virginia...
  Southern Giles County in southwestern Virginia...
  The City of Radford in southwestern Virginia...
  East central Bland County in southwestern Virginia...
  Northeastern Wythe County in southwestern Virginia...
  Montgomery County in southwestern Virginia...

* Until 200 PM EST.

* At 102 PM EST, severe storms were located along a line extending 
  from near Chapel to near Wytheville, moving east at 40 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Blacksburg...
  Christiansburg...
  Radford...
  Pulaski...
  Dublin...
  Newport...
  and Pilot.

This includes The following Location Virginia Tech.
 
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 3729 8092 3732 8043 3737 8033 3734 8026
      3730 8026 3723 8019 3711 8018 3708 8028
      3702 8035 3701 8040 3702 8042 3700 8042
      3702 8045 3698 8050 3701 8052 3699 8054
      3701 8056 3700 8108
TIME...MOT...LOC 1802Z 267DEG 34KT 3728 8087 3702 8104 

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

$$

RS

2 follow-up statements

836 
WWUS51 KRNK 111817
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
117 PM EST Sat Dec 11 2021

VAC021-197-111826-
/O.CAN.KRNK.SV.W.0220.000000T0000Z-211211T1900Z/
Bland VA-Wythe VA-
117 PM EST Sat Dec 11 2021

...THE SEVERE THUNDERSTORM WARNING FOR 
EAST CENTRAL BLAND AND NORTHEASTERN WYTHE COUNTIES IS CANCELLED...

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

LAT...LON 3730 8075 3732 8043 3737 8033 3734 8026
      3730 8026 3723 8019 3711 8018 3708 8028
      3702 8035 3701 8040 3702 8042 3701 8042
      3702 8045 3698 8050 3701 8052 3699 8054
      3701 8056 3701 8087 3705 8091
TIME...MOT...LOC 1816Z 267DEG 38KT 3729 8066 3703 8083 

$$

VAC071-121-155-750-111900-
/O.CON.KRNK.SV.W.0220.000000T0000Z-211211T1900Z/
Pulaski VA-Giles VA-City of Radford VA-Montgomery VA-
117 PM EST Sat Dec 11 2021

...A SEVERE STORM WARNING REMAINS IN EFFECT UNTIL 200 PM EST FOR 
PULASKI...SOUTHEASTERN GILES AND MONTGOMERY COUNTIES AND THE CITY OF 
RADFORD...

At 116 PM EST, severe storms were located along a line extending 
from Eggleston to near Pulaski, moving east at 45 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Blacksburg...
Christiansburg...
Radford...
Pulaski...
Dublin...
Newport...
and Pilot.

This includes The following Location Virginia Tech.
 
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 3730 8075 3732 8043 3737 8033 3734 8026
      3730 8026 3723 8019 3711 8018 3708 8028
      3702 8035 3701 8040 3702 8042 3701 8042
      3702 8045 3698 8050 3701 8052 3699 8054
      3701 8056 3701 8087 3705 8091
TIME...MOT...LOC 1816Z 267DEG 38KT 3729 8066 3703 8083 

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

$$

RS

663 
WWUS51 KRNK 111843
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
143 PM EST Sat Dec 11 2021

VAC071-121-155-750-111853-
/O.CAN.KRNK.SV.W.0220.000000T0000Z-211211T1900Z/
Pulaski VA-Giles VA-City of Radford VA-Montgomery VA-
143 PM EST Sat Dec 11 2021

...THE SEVERE THUNDERSTORM WARNING FOR 
PULASKI...SOUTHEASTERN GILES AND MONTGOMERY COUNTIES AND THE CITY OF
RADFORD IS CANCELLED...
            
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning has been cancelled.

LAT...LON 3730 8075 3732 8043 3737 8033 3734 8026
      3730 8026 3723 8019 3711 8018 3708 8028
      3702 8035 3701 8040 3702 8042 3701 8042
      3702 8045 3698 8050 3701 8052 3699 8054
      3701 8056 3701 8087 3705 8091
TIME...MOT...LOC 1841Z 267DEG 34KT 3730 8036 3704 8053 

$$

RS

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 11, 3:02 AM EST	Wind Advisory	RNK	Alleghany, Amherst, Bath, Bedford, Bland, Botetourt and 21 more	25 hr
Dec 11, 12:32 PM EST	Special Weather Statement	RNK	Grayson, Smyth, Wythe, City of Galax	43 min
Dec 11, 12:46 PM EST	Special Weather Statement	RNK	Bland, Pulaski, City of Radford	44 min
Dec 11, 12:54 PM EST	Severe Thunderstorm Warning	RNK	Carroll, Floyd, Grayson, Pulaski, Wythe, City of Galax	51 min
Dec 11, 1:09 PM EST	Special Weather Statement	RNK	Craig, Giles	36 min
Dec 11, 3:33 PM EST	Special Weather Statement	RNK	Pittsylvania, City of Martinsville	27 min
Dec 11, 4:06 PM EST	Special Weather Statement	RNK	Appomattox, Campbell, Pittsylvania, City of Danville	24 min
Dec 11, 4:35 PM EST	Special Weather Statement	RNK	Appomattox, Charlotte, Halifax, Pittsylvania, City of Danville	25 min
Dec 11, 5:00 PM EST	Special Weather Statement	RNK	Charlotte, Halifax, City of Danville	30 min
Dec 11, 5:30 PM EST	Special Weather Statement	RNK	Charlotte, Halifax, City of Danville	30 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.