Alert archive / Virginia / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 190, NWS Blacksburg, VA

August 28, 2021Halifax County, Pittsylvania County, Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at Aug 28, 2021, 3:45 PM EDT for Halifax County, Pittsylvania 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: Aug 28, 2021, 3:45 PM EDT (19:45 UTC)
Expired: Aug 28, 2021, 4:15 PM EDT
In force: 30 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Halifax County, VA, Pittsylvania County, VA

The radar

The Roanoke radar (KFCX), 114 km from the middle of the area, began a volume at 19:47 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, 7.8 hours before the alert went out and 51 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: 329 J/kg
Mixed-layer CIN: -126 J/kg
Mixed-layer LCL: 1018 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: -4 m²/s²
0-3 km storm-relative helicity: 24 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

774 
WUUS51 KRNK 281945
SVRRNK
VAC083-143-282015-
/O.NEW.KRNK.SV.W.0190.210828T1945Z-210828T2015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service BLACKSBURG VA
345 PM EDT Sat Aug 28 2021

The National Weather Service in BLACKSBURG has issued a

* Severe Thunderstorm Warning for...
  Northeastern Pittsylvania County in south central Virginia...
  Northern Halifax County in south central Virginia...

* Until 415 PM EDT.

* At 345 PM EDT, a severe thunderstorm was located near Brookneal, 
  moving southeast at 5 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Nathalie...
  Mt Airy...
  Cody...
  Leda...
  and Straightstone.

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.

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 3697 7885 3685 7915 3701 7924 3707 7911
      3704 7906 3704 7902 3703 7901 3705 7897
      3700 7889 3699 7890 3698 7890 3698 7887
TIME...MOT...LOC 1945Z 292DEG 4KT 3704 7906 

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

$$

RAB

2 follow-up statements

157 
WWUS51 KRNK 282005
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
405 PM EDT Sat Aug 28 2021

VAC083-143-282015-
/O.CON.KRNK.SV.W.0190.000000T0000Z-210828T2015Z/
Pittsylvania VA-Halifax VA-
405 PM EDT Sat Aug 28 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM EDT
FOR NORTHEASTERN PITTSYLVANIA AND NORTHWESTERN HALIFAX COUNTIES...

At 405 PM EDT, a severe thunderstorm was located over Cody, or 7
miles southwest of Brookneal, moving west at 10 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Nathalie...
Mt Airy...
Cody...
Leda...
and Straightstone.

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 3704 7896 3693 7894 3685 7915 3701 7924
      3707 7911 3707 7910 3704 7906 3704 7902
      3703 7901 3705 7897
TIME...MOT...LOC 2005Z 073DEG 10KT 3700 7909 

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

$$

RAB

362 
WWUS51 KRNK 282020
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
420 PM EDT Sat Aug 28 2021

VAC083-143-282030-
/O.EXP.KRNK.SV.W.0190.000000T0000Z-210828T2015Z/
Pittsylvania VA-Halifax VA-
420 PM EDT Sat Aug 28 2021

...THE SEVERE THUNDERSTORM WARNING FOR 
NORTHEASTERN PITTSYLVANIA AND NORTHWESTERN HALIFAX COUNTIES HAS
EXPIRED...
                
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 allowed to expire.  However heavy
rain is still possible with this thunderstorm.

LAT...LON 3704 7896 3693 7894 3685 7915 3701 7924
      3707 7911 3707 7910 3704 7906 3704 7902
      3703 7901 3705 7897
TIME...MOT...LOC 2020Z 292DEG 4KT 3699 7907 

$$

RAB

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 28, 2:22 PM EDT	Special Weather Statement	RNK	Montgomery	38 min
Aug 28, 3:20 PM EDT	Special Weather Statement	RNK	Campbell	25 min
Aug 28, 3:30 PM EDT	Special Weather Statement	RNK	Craig	30 min
Aug 28, 4:24 PM EDT	Special Weather Statement	RNK	Halifax	36 min
Aug 28, 4:26 PM EDT	Special Weather Statement	RNK	Appomattox	34 min
Aug 28, 4:46 PM EDT	Severe Thunderstorm Warning	RNK	Appomattox, Campbell, Charlotte	44 min
Aug 28, 5:24 PM EDT	Special Weather Statement	RNK	Bath	51 min
Aug 28, 5:28 PM EDT	Special Weather Statement	RNK	City of Covington	32 min
Aug 28, 6:21 PM EDT	Special Weather Statement	RNK	Bath	24 min
Aug 28, 6:46 PM EDT	Special Weather Statement	RNK	Bath	29 min
Aug 28, 7:02 PM EDT	Special Weather Statement	RNK	Charlotte	28 min
Aug 28, 7:33 PM EDT	Special Weather Statement	RNK	Charlotte	27 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.