Alert archive / Virginia / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 208, NWS Blacksburg, VA

September 8, 2021Floyd County, Franklin County, Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at Sep 8, 2021, 2:43 PM EDT for Floyd County, Franklin County, Virginia. It was in force for 30 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, 2:43 PM EDT (18:43 UTC)
Expired: Sep 8, 2021, 3:13 PM EDT
In force: 30 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Floyd County, VA, Franklin County, VA

The radar

The Roanoke radar (KFCX), 42 km from the middle of the area, began a volume at 18:47 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, 6.7 hours before the alert went out and 33 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: 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.

753 
WUUS51 KRNK 081843
SVRRNK
VAC063-067-081945-
/O.NEW.KRNK.SV.W.0208.210908T1843Z-210908T1945Z/

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

The National Weather Service in BLACKSBURG has issued a

* Severe Thunderstorm Warning for...
  East central Floyd County in southwestern Virginia...
  Central Franklin County in west central Virginia...

* Until 345 PM EDT.

* At 242 PM EDT, a severe thunderstorm was located near Callaway, or
  near Ferrum, 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...
  Rocky Mount...
  Ferrum...
  Penhook...
  Burnt Chimney...
  Northwest Smith Mountain Lake...
  Westlake Corner...
  and Southern Smith Mountain Lake.

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.

If on or near Smith Mountain Lake, get away from the water and move 
indoors or inside a vehicle. Remember, lightning can strike out to 
15 miles from the parent thunderstorm. If you can hear thunder, you 
are close enough to be struck by lightning. Move to safe shelter 
now!  Do not be caught on the water in a thunderstorm.

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 3696 7961 3684 8010 3685 8011 3701 8018
      3719 7972 3715 7970 3716 7970 3715 7968
      3700 7960
TIME...MOT...LOC 1842Z 251DEG 17KT 3696 8006 

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

$$

ET

2 follow-up statements

632 
WWUS51 KRNK 081857
SVSRNK

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

VAC063-081906-
/O.CAN.KRNK.SV.W.0208.000000T0000Z-210908T1945Z/
Floyd VA-
257 PM EDT Wed Sep 8 2021

...THE SEVERE THUNDERSTORM WARNING FOR 
EAST CENTRAL FLOYD COUNTY IS CANCELLED...
    
The severe thunderstorm which prompted the warning has  moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 3687 7997 3706 8005 3718 7976 3719 7972
      3715 7970 3716 7970 3715 7968 3700 7960
      3696 7961
TIME...MOT...LOC 1856Z 250DEG 35KT 3700 7991 

$$

VAC067-081945-
/O.CON.KRNK.SV.W.0208.000000T0000Z-210908T1945Z/
Franklin VA-
257 PM EDT Wed Sep 8 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM EDT
FOR CENTRAL FRANKLIN COUNTY...

At 256 PM EDT, a severe thunderstorm was located over Rocky Mount,
moving east at 40 mph.

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

SOURCE...Radar indicated.

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

Locations impacted include...
Rocky Mount...
Penhook...
Ferrum...
Burnt Chimney...
Western Smith Mountain Lake...
Union Hall...
and Sontag.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for 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.

If on or near Smith Mountain Lake, get away from the water and move 
indoors or inside a vehicle. remember, lightning can strike out to 
15 miles from the parent thunderstorm. If you can hear thunder, you 
are close enough to be struck by lightning. Move to safe shelter 
now!  Do not be caught on the water in a thunderstorm.

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 3687 7997 3706 8005 3718 7976 3719 7972
      3715 7970 3716 7970 3715 7968 3700 7960
      3696 7961
TIME...MOT...LOC 1856Z 250DEG 35KT 3700 7991 

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

$$

ET

985 
WWUS51 KRNK 081913
SVSRNK

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

VAC067-081922-
/O.CAN.KRNK.SV.W.0208.000000T0000Z-210908T1945Z/
Franklin VA-
313 PM EDT Wed Sep 8 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL FRANKLIN 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 small hail, 
gusty winds and heavy rain are still possible with additional storms 
in the area.

LAT...LON 3687 7997 3706 8005 3718 7976 3719 7972
      3715 7970 3716 7970 3715 7968 3700 7960
      3696 7961
TIME...MOT...LOC 1910Z 251DEG 17KT 3703 7982 

$$

ET

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 8, 10:48 AM EDT	Special Weather Statement	RNK	City of Danville	42 min
Sep 8, 11:49 AM EDT	Special Weather Statement	RNK	Charlotte	56 min
Sep 8, 1:21 PM EDT	Special Weather Statement	RNK	Carroll	54 min
Sep 8, 1:24 PM EDT	Severe Thunderstorm Warning	RNK	Carroll	37 min
Sep 8, 1:32 PM EDT	Severe Thunderstorm Warning	RNK	Carroll	58 min
Sep 8, 2:02 PM EDT	Special Weather Statement	RNK	Floyd	43 min
Sep 8, 2:20 PM EDT	Severe Thunderstorm Warning	RNK	Patrick	26 min
Sep 8, 2:22 PM EDT	Special Weather Statement	RNK	Floyd	23 min
Sep 8, 2:51 PM EDT	Special Weather Statement	RNK	Bedford	39 min
Sep 8, 3:15 PM EDT	Special Weather Statement	RNK	Franklin	45 min
Sep 8, 3:19 PM EDT	Special Weather Statement	RNK	Bedford	41 min
Sep 8, 3:24 PM EDT	Severe Thunderstorm Warning	RNK	Bedford, Botetourt, Rockbridge	36 min
Sep 8, 4:10 PM EDT	Special Weather Statement	RNK	City of Buena Vista	35 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.