Alert archive / Virginia / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 210, NWS Blacksburg, VA

September 8, 2021Bedford County, Botetourt County, Rockbridge County, Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at Sep 8, 2021, 3:24 PM EDT for Bedford County, Botetourt County, Rockbridge County, Virginia. It was in force for 36 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Sep 8, 2021, 3:24 PM EDT (19:24 UTC)
Expired
Sep 8, 2021, 4:00 PM EDT
In force
36 min
Issued by
NWS Blacksburg, VA
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Bedford County, VA, Botetourt County, VA, Rockbridge County, VA

The radar

The Roanoke radar (KFCX), 92 km from the middle of the area, began a volume at 19:27 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.

The nearest sounding before it

Roanoke, VA (KRNK), launched 12:00Z, 7.4 hours before the alert went out and 34 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-pSkew-T log-p diagram, Roanoke, VA at 12:00Z on 2021-09-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 216 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Roanoke, VA at 12:00Z on 2021-09-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 64 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
216 J/kg
Mixed-layer CIN
-96 J/kg
Mixed-layer LCL
875 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
64 m²/s²
0-3 km storm-relative helicity
37 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

956 
WUUS51 KRNK 081924
SVRRNK
VAC019-023-163-082000-
/O.NEW.KRNK.SV.W.0210.210908T1924Z-210908T2000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service BLACKSBURG VA
324 PM EDT Wed Sep 8 2021

The National Weather Service in BLACKSBURG has issued a

* Severe Thunderstorm Warning for...
  South central Rockbridge County in west central Virginia...
  Northern Bedford County in south central Virginia...
  Southeastern Botetourt County in west central Virginia...

* Until 400 PM EDT.

* At 324 PM EDT, a severe thunderstorm was located over Thaxton, or
  near Montvale, moving northeast at 30 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...
  Bedford...
  Glasgow...
  Montvale...
  Big Island...
  Coleman Falls...
  Peaks Of Otter Summit...
  and Peaks Of Otter Recreation Area.

This includes The following Location The National D-Day Memorial.
 
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 3724 7969 3735 7984 3764 7949 3761 7943
      3760 7943 3760 7942 3758 7938 3755 7937
      3751 7934 3750 7930 3751 7926 3749 7926
      3751 7924 3750 7922
TIME...MOT...LOC 1924Z 227DEG 26KT 3737 7966 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

ET
3 follow-up statements
341 
WWUS51 KRNK 081933
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
333 PM EDT Wed Sep 8 2021

VAC019-023-163-082000-
/O.CON.KRNK.SV.W.0210.000000T0000Z-210908T2000Z/
Rockbridge VA-Bedford VA-Botetourt VA-
333 PM EDT Wed Sep 8 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM EDT 
FOR SOUTH CENTRAL ROCKBRIDGE...NORTHERN BEDFORD AND SOUTHEASTERN 
BOTETOURT COUNTIES...

At 333 PM EDT, a severe thunderstorm was located near Thaxton, or
near Montvale, moving northeast at 25 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...
Bedford...
Glasgow...
Montvale...
Big Island...
Coleman Falls...
Peaks Of Otter Summit...
and Peaks Of Otter Recreation Area.

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 3728 7965 3738 7980 3742 7976 3764 7949
      3761 7943 3760 7943 3760 7942 3758 7938
      3755 7937 3751 7934 3750 7930 3750 7929
      3748 7926 3739 7942
TIME...MOT...LOC 1933Z 227DEG 22KT 3739 7962 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

ET
661 
WWUS51 KRNK 081944
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
344 PM EDT Wed Sep 8 2021

VAC019-023-163-082000-
/O.CON.KRNK.SV.W.0210.000000T0000Z-210908T2000Z/
Rockbridge VA-Bedford VA-Botetourt VA-
344 PM EDT Wed Sep 8 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM EDT 
FOR SOUTH CENTRAL ROCKBRIDGE...NORTHERN BEDFORD AND EAST CENTRAL 
BOTETOURT COUNTIES...

At 344 PM EDT, a severe thunderstorm was located over Peaks Of Otter
Summit, or 7 miles southeast of Buchanan, moving northeast at 30 mph.

HAZARD...60 mph wind gusts and nickel size hail.

SOURCE...Radar indicated.

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

Locations impacted include...
Bedford...
Glasgow...
Big Island...
Coleman Falls...
Peaks Of Otter Summit...
Peaks Of Otter Recreation Area...
and Sedalia.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for ${CTAhailwindthreat}, 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 3733 7955 3744 7973 3745 7972 3764 7949
      3761 7943 3760 7943 3760 7942 3758 7938
      3755 7937 3751 7934 3750 7931
TIME...MOT...LOC 1944Z 219DEG 27KT 3745 7958 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

ET
484 
WWUS51 KRNK 081950 RRA
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
350 PM EDT Wed Sep 8 2021

VAC019-023-163-082000-
/O.EXP.KRNK.SV.W.0210.000000T0000Z-210908T2000Z/
Rockbridge VA-Bedford VA-Botetourt VA-
350 PM EDT Wed Sep 8 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL 
ROCKBRIDGE...NORTHERN BEDFORD AND EAST CENTRAL BOTETOURT COUNTIES 
WILL EXPIRE AT 400 PM EDT...
                
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 will be allowed to expire.  However small
hail, gusty winds and heavy rain are still possible with this
thunderstorm.

LAT...LON 3733 7955 3744 7973 3745 7972 3764 7949
      3761 7943 3760 7943 3760 7942 3758 7938
      3755 7937 3751 7934 3750 7931
TIME...MOT...LOC 1950Z 227DEG 26KT 3747 7955 

$$

ET

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 8, 10:48 AM EDTSpecial Weather StatementRNKCity of Danville42 min
Sep 8, 11:49 AM EDTSpecial Weather StatementRNKCharlotte56 min
Sep 8, 1:21 PM EDTSpecial Weather StatementRNKCarroll54 min
Sep 8, 1:24 PM EDTSevere Thunderstorm WarningRNKCarroll37 min
Sep 8, 1:32 PM EDTSevere Thunderstorm WarningRNKCarroll58 min
Sep 8, 2:02 PM EDTSpecial Weather StatementRNKFloyd43 min
Sep 8, 2:20 PM EDTSevere Thunderstorm WarningRNKPatrick26 min
Sep 8, 2:22 PM EDTSpecial Weather StatementRNKFloyd23 min
Sep 8, 2:43 PM EDTSevere Thunderstorm WarningRNKFloyd, Franklin30 min
Sep 8, 2:51 PM EDTSpecial Weather StatementRNKBedford39 min
Sep 8, 3:15 PM EDTSpecial Weather StatementRNKFranklin45 min
Sep 8, 3:19 PM EDTSpecial Weather StatementRNKBedford41 min
Sep 8, 4:10 PM EDTSpecial Weather StatementRNKCity of Buena Vista35 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2021Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.