Alert archive / Virginia / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 79, NWS Blacksburg, VA

July 13, 2021Montgomery County, Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at Jul 13, 2021, 2:37 PM EDT for Montgomery County, Virginia. It was in force for 38 min. 5 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: Jul 13, 2021, 2:37 PM EDT (18:37 UTC)
Expired: Jul 13, 2021, 3:15 PM EDT
In force: 38 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Montgomery County, VA

The radar

The Roanoke radar (KFCX), 26 km from the middle of the area, began a volume at 18:40 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
Jul 13, 2:50 PM EDT	TSTM WND DMG	2 Ne Blacksburg, VA	CORRECTS PREVIOUS TSTM WND DMG REPORT FROM 2 NE BLACKSBURG. CORRECTS PREVIOUS TSTM WND DMG REPORT FROM 2 NE BLACKSBURG. AT LEAST TWO TREES DOWN. SEVERAL SMALL LIMBS DOWN IN THE AREA AS WELL. POWER OUT. PEA-SIZED HAIL WAS ALSO OBSERVED.
Jul 13, 2:50 PM EDT	HAIL 0.7	1 Wnw Blacksburg, VA
Jul 13, 2:54 PM EDT	TSTM WND DMG	1 Sse Blacksburg, VA	TREE DOWN BLOCKING ROAD, NEAR INTERSECTION OF HOUSTON AND HARRELL STREET.
Jul 13, 2:54 PM EDT	HAIL 0.7	1 Wsw Blacksburg, VA	AT 460 AND PRICES FORK ROAD.
Jul 13, 2:58 PM EDT	TSTM WND DMG	2 Nne Blacksburg, VA	TREE DOWN NEAR INTERSECTION OF MT. TABOR AND BISHOP 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, 6.6 hours before the alert went out and 85 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: 1339 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: -21 m²/s²
0-3 km storm-relative helicity: 21 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

248 
WUUS51 KRNK 131837
SVRRNK
VAC121-131915-
/O.NEW.KRNK.SV.W.0079.210713T1837Z-210713T1915Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service BLACKSBURG VA
237 PM EDT Tue Jul 13 2021

The National Weather Service in BLACKSBURG has issued a

* Severe Thunderstorm Warning for...
  Central Montgomery County in southwestern Virginia...

* Until 315 PM EDT.

* At 237 PM EDT, a severe thunderstorm was located over Prices Fork,
  or near Blacksburg, moving northeast at 30 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Blacksburg...
  Christiansburg...
  Shawsville...
  Prices Fork...
  Mc Donalds Mill...
  Elliston-Lafayette...
  and Merrimac.

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.

Locally heavy rain will quickly reduce visibility and result in
ponding of water on roadways, standing water in low lying areas, and
minor flooding of creeks, streams, and areas of poor drainage.
Drivers are urged to slow down and use extra caution to avoid
hydroplaning.

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 3736 8034 3722 8019 3721 8019 3710 8044
      3713 8052 3714 8051 3715 8051 3716 8055
      3717 8056 3719 8055 3720 8052 3721 8052
      3718 8059 3721 8062
TIME...MOT...LOC 1837Z 240DEG 25KT 3720 8047 

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

WP

3 follow-up statements

939 
WWUS51 KRNK 131851
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
251 PM EDT Tue Jul 13 2021

VAC121-131915-
/O.CON.KRNK.SV.W.0079.000000T0000Z-210713T1915Z/
Montgomery VA-
251 PM EDT Tue Jul 13 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 PM EDT
FOR EASTERN MONTGOMERY COUNTY...

At 251 PM EDT, a severe thunderstorm was located over Blacksburg,
moving northeast at 25 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Blacksburg...
Christiansburg...
Mc Donalds Mill...
Merrimac...
Elliston-Lafayette...
and Elliston.

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.

Locally heavy rain will quickly reduce visibility and result in
ponding of water on roadways, standing water in low lying areas, and
minor flooding of creeks, streams, and areas of poor drainage.
Drivers are urged to slow down and use extra caution to avoid
hydroplaning.

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 3715 8041 3724 8051 3736 8034 3722 8019
      3721 8019 3720 8020
TIME...MOT...LOC 1851Z 235DEG 21KT 3724 8040 

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

WP

655 
WWUS51 KRNK 131904
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
304 PM EDT Tue Jul 13 2021

VAC121-131915-
/O.CON.KRNK.SV.W.0079.000000T0000Z-210713T1915Z/
Montgomery VA-
304 PM EDT Tue Jul 13 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 PM EDT
FOR EASTERN MONTGOMERY COUNTY...

At 303 PM EDT, a severe thunderstorm was located near Mc Donalds
Mill, or near Blacksburg, moving northeast at 25 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Blacksburg...
Mc Donalds Mill...
Elliston-Lafayette...
and Elliston.

In addition hail up to the size of nickels are possible.

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.

Locally heavy rain will quickly reduce visibility and result in
ponding of water on roadways, standing water in low lying areas, and
minor flooding of creeks, streams, and areas of poor drainage.
Drivers are urged to slow down and use extra caution to avoid
hydroplaning.

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 3719 8036 3727 8044 3736 8034 3722 8019
      3721 8019 3720 8020
TIME...MOT...LOC 1903Z 244DEG 23KT 3726 8032 

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

WP

042 
WWUS51 KRNK 131915
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
315 PM EDT Tue Jul 13 2021

VAC121-131925-
/O.EXP.KRNK.SV.W.0079.000000T0000Z-210713T1915Z/
Montgomery VA-
315 PM EDT Tue Jul 13 2021

...THE SEVERE THUNDERSTORM WARNING FOR 
NORTHEASTERN MONTGOMERY COUNTY HAS EXPIRED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been allowed to expire.

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 3719 8036 3727 8044 3736 8034 3722 8019
      3721 8019 3720 8020
TIME...MOT...LOC 1915Z 240DEG 25KT 3730 8024 

$$

WP

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 13, 2:09 PM EDT	Special Weather Statement	RNK	Montgomery, Pulaski, City of Radford	36 min
Jul 13, 3:14 PM EDT	Severe Thunderstorm Warning	RNK	Botetourt, Craig, Montgomery, Roanoke	46 min
Jul 13, 3:41 PM EDT	Special Weather Statement	RNK	Wythe	34 min
Jul 13, 3:46 PM EDT	Special Weather Statement	RNK	Alleghany, City of Covington	29 min
Jul 13, 4:00 PM EDT	Special Weather Statement	RNK	Botetourt	30 min
Jul 13, 4:04 PM EDT	Severe Thunderstorm Warning	RNK	Botetourt	41 min
Jul 13, 4:33 PM EDT	Special Weather Statement	RNK	Pulaski	42 min
Jul 13, 5:03 PM EDT	Special Weather Statement	RNK	Pulaski	42 min
Jul 13, 5:21 PM EDT	Special Weather Statement	RNK	Wythe	39 min
Jul 13, 6:00 PM EDT	Special Weather Statement	RNK	Alleghany	45 min
Jul 13, 6:36 PM EDT	Special Weather Statement	RNK	Bath	39 min
Jul 13, 6:53 PM EDT	Special Weather Statement	RNK	Smyth	52 min
Jul 13, 7:40 PM EDT	Special Weather Statement	RNK	Wythe	50 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.