Alert archive / Virginia / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 81, NWS Blacksburg, VA

July 13, 2021Botetourt County, Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at Jul 13, 2021, 4:04 PM EDT for Botetourt County, Virginia. It was in force for 41 min. 2 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, 4:04 PM EDT (20:04 UTC)
Expired: Jul 13, 2021, 4:45 PM EDT
In force: 41 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Botetourt County, VA

The radar

The Roanoke radar (KFCX), 76 km from the middle of the area, began a volume at 20:06 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
Jul 13, 4:10 PM EDT	TSTM WND DMG	2 W Springwood, VA	TREE DOWN BLOCKING ROAD. TIME ESTIMATED FROM RADAR.
Jul 13, 4:14 PM EDT	TSTM WND DMG	2 E Springwood, VA	ONE TREE DOWN.

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, 8.1 hours before the alert went out and 41 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.

470 
WUUS51 KRNK 132004
SVRRNK
VAC023-132045-
/O.NEW.KRNK.SV.W.0081.210713T2004Z-210713T2045Z/

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

The National Weather Service in BLACKSBURG has issued a

* Severe Thunderstorm Warning for...
  Central Botetourt County in west central Virginia...

* Until 445 PM EDT.

* At 404 PM EDT, a severe thunderstorm was located near Troutville, 
  moving northeast at 15 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...
  Buchanan...
  Troutville...
  Fincastle...
  Nace...
  Arcadia...
  Springwood...
  I-81 mile markers 150 to 165,
  and Lithia.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail and damaging winds, as well as
deadly cloud to ground lightning. 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 3769 7967 3766 7968 3760 7957 3758 7958
      3754 7951 3747 7964 3749 7966 3748 7969
      3742 7977 3740 7981 3738 7980 3737 7982
      3748 7993 3773 7969
TIME...MOT...LOC 2004Z 240DEG 15KT 3744 7979 

HAIL...1.00IN
WIND...60MPH
 
$$

RAB

3 follow-up statements

408 
WWUS51 KRNK 132019
SVSRNK

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

VAC023-132045-
/O.CON.KRNK.SV.W.0081.000000T0000Z-210713T2045Z/
Botetourt VA-
419 PM EDT Tue Jul 13 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM EDT
FOR NORTHEASTERN BOTETOURT COUNTY...

At 419 PM EDT, a severe thunderstorm was located over Lithia, or near
Buchanan, moving northeast at 15 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...
Buchanan...
Arcadia...
Springwood...
and Lithia.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for LARGE HAIL AND DAMAGING WINDS, as well as
deadly cloud to ground lightning. 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 3769 7967 3766 7968 3760 7957 3758 7958
      3754 7951 3747 7964 3749 7966 3748 7969
      3743 7975 3756 7980 3773 7969
TIME...MOT...LOC 2019Z 240DEG 15KT 3747 7972 

HAIL...1.00IN
WIND...60MPH
 
$$

RAB

896 
WWUS51 KRNK 132034
SVSRNK

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

VAC023-132045-
/O.CON.KRNK.SV.W.0081.000000T0000Z-210713T2045Z/
Botetourt VA-
434 PM EDT Tue Jul 13 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM EDT
FOR NORTHEASTERN BOTETOURT COUNTY...

At 434 PM EDT, a severe thunderstorm was located over Buchanan,
moving northeast at 15 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.

This severe thunderstorm will remain over mainly rural areas of 
northeastern Botetourt County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for LARGE HAIL AND DAMAGING WINDS, as well as
deadly cloud to ground lightning. 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 3754 7951 3757 7965 3762 7970 3773 7969
      3769 7967 3766 7968 3760 7957 3758 7958
TIME...MOT...LOC 2034Z 240DEG 15KT 3750 7965 

HAIL...1.00IN
WIND...60MPH
 
$$

RAB

657 
WWUS51 KRNK 132044
SVSRNK

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

VAC023-132054-
/O.EXP.KRNK.SV.W.0081.000000T0000Z-210713T2045Z/
Botetourt VA-
444 PM EDT Tue Jul 13 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN BOTETOURT COUNTY 
WILL EXPIRE AT 445 PM EDT...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be 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 3754 7951 3757 7965 3762 7970 3773 7969
      3769 7967 3766 7968 3760 7957 3758 7958
TIME...MOT...LOC 2044Z 240DEG 15KT 3752 7961 

$$

RAB

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, 2:37 PM EDT	Severe Thunderstorm Warning	RNK	Montgomery	38 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, 4:33 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.