Alert archive / Virginia / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 219, NWS Blacksburg, VA

December 11, 20216 counties in Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at Dec 11, 2021, 12:54 PM EST for 6 counties in Virginia. It was in force for 51 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: Dec 11, 2021, 12:54 PM EST (17:54 UTC)
Expired: Dec 11, 2021, 1:45 PM EST
In force: 51 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Carroll County, VA, City of Galax, VA, Floyd County, VA, Grayson County, VA, Pulaski County, VA, Wythe County, VA

The radar

The Roanoke radar (KFCX), 64 km from the middle of the area, began a volume at 17:54 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, 12:56 PM EST	TSTM WND DMG	1 W Speedwell, VA	TREE AND POWER LINE DOWN.

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

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 5.9 hours before the alert went out and 128 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: 481 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 284 m²/s²
0-3 km storm-relative helicity: 258 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

397 
WUUS51 KRNK 111754
SVRRNK
VAC035-063-077-155-197-640-111845-
/O.NEW.KRNK.SV.W.0219.211211T1754Z-211211T1845Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service BLACKSBURG VA
1254 PM EST Sat Dec 11 2021

The National Weather Service in BLACKSBURG has issued a

* Severe Thunderstorm Warning for...
  Southern Pulaski County in southwestern Virginia...
  West central Floyd County in southwestern Virginia...
  Wythe County in southwestern Virginia...
  Carroll County in southwestern Virginia...
  The City of Galax in southwestern Virginia...
  Northeastern Grayson County in southwestern Virginia...

* Until 145 PM EST.

* At 1253 PM EST, a severe storm was located over Speedwell, moving 
  east at 45 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Wytheville...
  Galax...
  Hillsville...
  Fries...
  Max Meadows...
  Allisonia...
  and Indian Valley.

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 3675 8132 3676 8126 3682 8129 3699 8121
      3701 8055 3699 8054 3701 8052 3700 8052
      3661 8064 3666 8136
TIME...MOT...LOC 1753Z 264DEG 42KT 3681 8120 

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

$$

RS

2 follow-up statements

608 
WWUS51 KRNK 111815
SVSRNK

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

VAC035-063-077-155-197-640-111845-
/O.CON.KRNK.SV.W.0219.000000T0000Z-211211T1845Z/
Pulaski VA-Floyd VA-Wythe VA-Carroll VA-City of Galax VA-Grayson VA-
115 PM EST Sat Dec 11 2021

...A SEVERE STORM WARNING REMAINS IN EFFECT UNTIL 145 PM EST FOR 
SOUTHERN PULASKI...WEST CENTRAL FLOYD...SOUTHEASTERN WYTHE...CARROLL 
AND NORTHEASTERN GRAYSON COUNTIES AND THE CITY OF GALAX...

At 114 PM EST, severe storms were located along a line extending 
from Gunton Park to Ivanhoe, moving east at 45 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Galax...
Hillsville...
Fries...
Indian Valley...
Fancy Gap...
Max Meadows...
and Patterson.

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 3673 8107 3700 8094 3701 8055 3699 8054
      3701 8052 3700 8052 3661 8064 3664 8102
TIME...MOT...LOC 1814Z 261DEG 39KT 3700 8087 3681 8095 

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

$$

RS

592 
WWUS51 KRNK 111835
SVSRNK

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

VAC035-063-077-155-197-640-111845-
/O.EXP.KRNK.SV.W.0219.000000T0000Z-211211T1845Z/
Pulaski VA-Floyd VA-Wythe VA-Carroll VA-City of Galax VA-Grayson VA-
135 PM EST Sat Dec 11 2021

...THE SEVERE THUNDERSTORM WARNING FOR 
SOUTHERN PULASKI...WEST CENTRAL FLOYD...SOUTHEASTERN WYTHE...CARROLL
AND NORTHEASTERN GRAYSON COUNTIES AND THE CITY OF GALAX WILL EXPIRE
AT 145 PM EST...
            
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 will be allowed to expire.

LAT...LON 3673 8107 3700 8094 3701 8055 3699 8054
      3701 8052 3700 8052 3661 8064 3664 8102
TIME...MOT...LOC 1835Z 264DEG 42KT 3702 8057 3683 8065 

$$

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, 1:03 PM EST	Severe Thunderstorm Warning	RNK	Bland, Giles, Montgomery, Pulaski, Wythe, City of Radford	40 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.