Alert archive / Virginia / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 133, NWS Blacksburg, VA

August 10, 20215 counties in Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at Aug 10, 2021, 12:43 PM EDT for 5 counties in Virginia. It was in force for 46 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: Aug 10, 2021, 12:43 PM EDT (16:43 UTC)
Expired: Aug 10, 2021, 1:29 PM EDT
In force: 46 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Carroll County, VA, City of Radford, VA, Floyd County, VA, Montgomery County, VA, Pulaski County, VA

The radar

The Roanoke radar (KFCX), 29 km from the middle of the area, began a volume at 16:46 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 10, 12:43 PM EDT	TSTM WND DMG	2 Sw Radford, VA	TREE DOWN ALONG HAZEL HOLLOW ROAD. TIME ESTIMATED FROM RADAR.
Aug 10, 12:53 PM EDT	TSTM WND DMG	2 Ssw Radford, VA	SEVERAL LARGE TREE LIMBS BLOWN DOWN ON ROCK ROAD NEAR ITS INTERSECTION WITH MAIN STREET.
Aug 10, 1:00 PM EDT	TSTM WND DMG	1 S Radford, VA	TREE SNAPPED AT INTERSECTION OF WADSWORTH STREET AND PERSHING AVENUE. TIME ESTIMATED FROM RADAR.

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, 4.7 hours before the alert went out and 100 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: 222 J/kg
Mixed-layer CIN: -65 J/kg
Mixed-layer LCL: 1006 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: -16 m²/s²
0-3 km storm-relative helicity: 22 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

064 
WUUS51 KRNK 101643
SVRRNK
VAC035-063-121-155-750-101745-
/O.NEW.KRNK.SV.W.0133.210810T1643Z-210810T1745Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service BLACKSBURG VA
1243 PM EDT Tue Aug 10 2021

The National Weather Service in BLACKSBURG has issued a

* Severe Thunderstorm Warning for...
  Pulaski County in southwestern Virginia...
  The City of Radford in southwestern Virginia...
  Floyd County in southwestern Virginia...
  Northeastern Carroll County in southwestern Virginia...
  Southern Montgomery County in southwestern Virginia...

* Until 145 PM EDT.

* At 1243 PM EDT, a severe thunderstorm was located near Draper, or
  near Pulaski, moving southeast at 15 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Christiansburg...
  Radford...
  Pulaski...
  Dublin...
  Floyd...
  Indian Valley...
  and Pilot.

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 3700 8084 3721 8068 3709 8016 3672 8049
TIME...MOT...LOC 1643Z 298DEG 12KT 3705 8072 

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

$$

VFJ

2 follow-up statements

196 
WWUS51 KRNK 101714
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
114 PM EDT Tue Aug 10 2021

VAC035-155-101723-
/O.CAN.KRNK.SV.W.0133.000000T0000Z-210810T1745Z/
Pulaski VA-Carroll VA-
114 PM EDT Tue Aug 10 2021

...THE SEVERE THUNDERSTORM WARNING FOR 
PULASKI AND NORTHEASTERN CARROLL COUNTIES IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 3699 8055 3704 8057 3705 8057 3704 8054
      3706 8055 3708 8058 3712 8060 3715 8056
      3713 8053 3715 8053 3716 8055 3715 8052
      3709 8016 3682 8040
TIME...MOT...LOC 1713Z 301DEG 20KT 3707 8051 

$$

VAC063-121-750-101745-
/O.CON.KRNK.SV.W.0133.000000T0000Z-210810T1745Z/
City of Radford VA-Floyd VA-Montgomery VA-
114 PM EDT Tue Aug 10 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 145 PM EDT
FOR
CENTRAL FLOYD AND SOUTHERN MONTGOMERY COUNTIES AND THE CITY OF
RADFORD...

At 113 PM EDT, a severe thunderstorm was located over Childress, or
near Radford, moving southeast at 25 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Christiansburg...
Radford...
Floyd...
Pilot...
Terrys Fork...
Alum Ridge...
and Childress.

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 3699 8055 3704 8057 3705 8057 3704 8054
      3706 8055 3708 8058 3712 8060 3715 8056
      3713 8053 3715 8053 3716 8055 3715 8052
      3709 8016 3682 8040
TIME...MOT...LOC 1713Z 301DEG 20KT 3707 8051 

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

$$

16

604 
WWUS51 KRNK 101729
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
129 PM EDT Tue Aug 10 2021

VAC063-121-750-101739-
/O.CAN.KRNK.SV.W.0133.000000T0000Z-210810T1745Z/
City of Radford VA-Floyd VA-Montgomery VA-
129 PM EDT Tue Aug 10 2021

...THE SEVERE THUNDERSTORM WARNING FOR 
CENTRAL FLOYD AND SOUTHERN MONTGOMERY COUNTIES AND THE CITY OF
RADFORD 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.

LAT...LON 3699 8055 3704 8057 3705 8057 3704 8054
      3706 8055 3708 8058 3712 8060 3715 8056
      3713 8053 3715 8053 3716 8055 3715 8052
      3709 8016 3682 8040
TIME...MOT...LOC 1724Z 298DEG 12KT 3704 8045 

$$

16

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 10, 11:01 AM EDT	Special Weather Statement	RNK	Bland	29 min
Aug 10, 11:35 AM EDT	Special Weather Statement	RNK	Pulaski	40 min
Aug 10, 12:30 PM EDT	Special Weather Statement	RNK	Floyd, Pulaski, City of Radford	45 min
Aug 10, 12:32 PM EDT	Special Weather Statement	RNK	Smyth	28 min
Aug 10, 1:08 PM EDT	Special Weather Statement	RNK	Henry, City of Martinsville	22 min
Aug 10, 1:29 PM EDT	Special Weather Statement	RNK	Henry, City of Martinsville	61 min
Aug 10, 1:56 PM EDT	Special Weather Statement	RNK	City of Roanoke, City of Salem	49 min
Aug 10, 2:20 PM EDT	Special Weather Statement	RNK	Carroll, Patrick, City of Galax	25 min
Aug 10, 2:22 PM EDT	Special Weather Statement	RNK	Pittsylvania	23 min
Aug 10, 2:28 PM EDT	Severe Thunderstorm Warning	RNK	Carroll, Floyd, Grayson, Patrick, City of Galax	62 min
Aug 10, 2:40 PM EDT	Special Weather Statement	RNK	Bedford	35 min
Aug 10, 2:44 PM EDT	Special Weather Statement	RNK	Buckingham	31 min
Aug 10, 2:51 PM EDT	Special Weather Statement	RNK	Franklin	24 min
Aug 10, 2:57 PM EDT	Severe Thunderstorm Warning	RNK	Bedford, Campbell, Franklin, Pittsylvania	63 min
Aug 10, 3:10 PM EDT	Special Weather Statement	RNK	Patrick	35 min
Aug 10, 3:11 PM EDT	Special Weather Statement	RNK	Buckingham	34 min
Aug 10, 3:44 PM EDT	Special Weather Statement	RNK	Campbell	31 min
Aug 10, 3:58 PM EDT	Special Weather Statement	RNK	Buckingham	32 min
Aug 10, 4:06 PM EDT	Special Weather Statement	RNK	Appomattox, Campbell	24 min
Aug 10, 4:14 PM EDT	Severe Thunderstorm Warning	RNK	Appomattox, Campbell, Charlotte, Halifax, Pittsylvania	61 min
Aug 10, 4:19 PM EDT	Severe Thunderstorm Warning	RNK	Buckingham	56 min
Aug 10, 4:36 PM EDT	Special Weather Statement	RNK	Wythe	24 min
Aug 10, 4:39 PM EDT	Special Weather Statement	RNK	Nelson	36 min
Aug 10, 4:53 PM EDT	Severe Thunderstorm Warning	RNK	Amherst, Appomattox, Buckingham	67 min
Aug 10, 5:08 PM EDT	Special Weather Statement	RNK	Rockbridge	37 min
Aug 10, 5:11 PM EDT	Special Weather Statement	RNK	Charlotte	49 min
Aug 10, 5:12 PM EDT	Special Weather Statement	RNK	Cumberland	48 min
Aug 10, 5:26 PM EDT	Areal Flood Advisory	RNK	Buckingham	3 hr
Aug 10, 5:27 PM EDT	Special Weather Statement	RNK	Halifax	48 min
Aug 10, 5:33 PM EDT	Special Weather Statement	RNK	Buckingham	57 min
Aug 10, 5:39 PM EDT	Severe Thunderstorm Warning	RNK	Charlotte	51 min
Aug 10, 6:42 PM EDT	Special Weather Statement	RNK	Halifax	33 min
Aug 10, 6:57 PM EDT	Special Weather Statement	RNK	Halifax	48 min
Aug 10, 7:04 PM EDT	Severe Thunderstorm Warning	RNK	Charlotte, Halifax	56 min
Aug 10, 7:59 PM EDT	Special Weather Statement	RNK	Halifax	31 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.