Alert archive / Virginia / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 207, NWS Blacksburg, VA

September 8, 2021Patrick County, Virginia; Surry County, North Carolina

NWS Blacksburg, VA issued this severe thunderstorm warning at Sep 8, 2021, 2:20 PM EDT for Patrick County, Virginia; Surry County, North Carolina. It was in force for 26 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, 2:20 PM EDT (18:20 UTC)
Expired
Sep 8, 2021, 2:46 PM EDT
In force
26 min
Issued by
NWS Blacksburg, VA
Area
Storm-based polygon
Tornado
Possible
Hail
1.0 in
Wind
60.0 mph

Counties Surry County, NC, Patrick County, VA

The radar

The Roanoke radar (KFCX), 58 km from the middle of the area, began a volume at 18:20 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

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 6.3 hours before the alert went out and 74 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, Greensboro/Hi Pt, NC at 12:00Z on 2021-09-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1161 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, Greensboro/Hi Pt, NC at 12:00Z on 2021-09-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 34 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
1161 J/kg
Mixed-layer CIN
-41 J/kg
Mixed-layer LCL
818 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
34 m²/s²
0-3 km storm-relative helicity
8 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

053 
WUUS51 KRNK 081820
SVRRNK
NCC171-VAC141-081915-
/O.NEW.KRNK.SV.W.0207.210908T1820Z-210908T1915Z/

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

The National Weather Service in BLACKSBURG has issued a

* Severe Thunderstorm Warning for...
  Northeastern Surry County in northwestern North Carolina...
  South central Patrick County in southwestern Virginia...

* Until 315 PM EDT.

* At 220 PM EDT, a severe thunderstorm was located near Woodville, or
  near Flat Rock, moving east at 20 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...
  Mount Airy...
  and Flat Rock.

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 3649 8058 3655 8061 3661 8042 3655 8038
      3655 8044 3652 8044
TIME...MOT...LOC 1820Z 261DEG 19KT 3653 8052 

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

$$

RAB
3 follow-up statements
368 
WWUS51 KRNK 081828
SVSRNK

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

NCC171-VAC141-081915-
/O.CON.KRNK.SV.W.0207.000000T0000Z-210908T1915Z/
Surry NC-Patrick VA-
228 PM EDT Wed Sep 8 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 PM EDT
FOR NORTHEASTERN SURRY AND SOUTH CENTRAL PATRICK COUNTIES...

At 226 PM EDT, a severe thunderstorm was located over Woodville, or
just east of Mt. Airy, moving east at 20 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...
Mount Airy...
and Flat Rock.

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. Several reports of pea to penny-sized hail were 
previously reported with this storm.

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 3649 8058 3655 8061 3661 8042 3655 8038
      3655 8044 3652 8044
TIME...MOT...LOC 1826Z 261DEG 19KT 3654 8048 

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

$$

RAB
295 
WWUS51 KRNK 081840
SVSRNK

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

NCC171-081849-
/O.CAN.KRNK.SV.W.0207.000000T0000Z-210908T1915Z/
Surry NC-
240 PM EDT Wed Sep 8 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN SURRY COUNTY has 
been CANCELLED...    

The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 3659 8048 3661 8042 3656 8038 3655 8038
      3655 8045 3656 8045
TIME...MOT...LOC 1839Z 261DEG 19KT 3655 8040 

$$

VAC141-081915-
/O.CON.KRNK.SV.W.0207.000000T0000Z-210908T1915Z/
Patrick VA-
240 PM EDT Wed Sep 8 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 PM EDT
FOR SOUTH CENTRAL PATRICK COUNTY...

At 239 PM EDT, a severe thunderstorm was located over Collinstown, or
near Francisco, moving east at 20 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 
south central Patrick 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 3659 8048 3661 8042 3656 8038 3655 8038
      3655 8045 3656 8045
TIME...MOT...LOC 1839Z 261DEG 19KT 3655 8040 

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

$$

RAB
211 
WWUS51 KRNK 081846
SVSRNK

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

VAC141-081856-
/O.CAN.KRNK.SV.W.0207.000000T0000Z-210908T1915Z/
Patrick VA-
246 PM EDT Wed Sep 8 2021

...THE SEVERE THUNDERSTORM WARNING FOR 
SOUTH CENTRAL PATRICK COUNTY 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.  However heavy rain is
still possible with this thunderstorm.

LAT...LON 3659 8048 3661 8042 3656 8038 3655 8038
      3655 8045 3656 8045
TIME...MOT...LOC 1844Z 261DEG 19KT 3656 8035 

$$

RAB

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, 2:22 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, 3:24 PM EDTSevere Thunderstorm WarningRNKBedford, Botetourt, Rockbridge36 min
Sep 8, 4:10 PM EDTSpecial Weather StatementRNKCity of Buena Vista35 min
Sep 8, 10:00 AM EDTSpecial Weather StatementRNKCaswell, Rockingham, Stokes60 min
Sep 8, 11:07 AM EDTSpecial Weather StatementRNKPerson38 min
Sep 8, 12:34 PM EDTSpecial Weather StatementRNKAlleghany56 min
Sep 8, 12:35 PM EDTSpecial Weather StatementRNKWilkes40 min
Sep 8, 1:27 PM EDTSpecial Weather StatementRNKSurry63 min
Sep 8, 1:47 PM EDTTornado WarningRNKSurry28 min
Sep 8, 2:15 PM EDTSevere Thunderstorm WarningRNKSurry, Wilkes29 min
Sep 8, 2:34 PM EDTSpecial Weather StatementRNKWilkes56 min
Sep 8, 2:54 PM EDTSpecial Weather StatementRNKSurry51 min
Sep 8, 3:04 PM EDTSevere Thunderstorm WarningRNKWilkes56 min
Sep 8, 3:31 PM EDTSevere Thunderstorm WarningRNKSurry, Yadkin33 min
Sep 8, 4:03 PM EDTSpecial Weather StatementRNKWilkes27 min
Sep 8, 6:06 PM EDTSpecial Weather StatementRNKYadkin24 min
Sep 8, 6:34 PM EDTSpecial Weather StatementRNKForsyth26 min
Sep 8, 7:01 PM EDTSpecial Weather StatementRNKStokes29 min
Sep 8, 7:40 PM EDTSpecial Weather StatementRNKStokes35 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2021Severe Thunderstorm Warnings in North Carolina, 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.