Alert archive / Virginia / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 123, NWS Blacksburg, VA

July 27, 2021Amherst County, Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at Jul 27, 2021, 11:50 PM EDT for Amherst County, Virginia. It was in force for 40 min. 1 report 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 27, 2021, 11:50 PM EDT (03:50 UTC)
Expired: Jul 28, 2021, 12:30 AM EDT
In force: 40 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Amherst County, VA

The radar

The Roanoke radar (KFCX), 133 km from the middle of the area, began a volume at 03:50 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 27, 11:54 PM EDT	HAIL 0.75	1 Nnw Lowesville, VA	FARMER ESTIMATED MAXIMUM PENNY-SIZED HAIL AT THEIR PROPERTY. TIME ESTIMATED BY RADAR.

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 00:00Z, 3.8 hours before the alert went out and 69 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: 372 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 1853 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: -10 m²/s²
0-3 km storm-relative helicity: 46 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.2

Open this sounding in Storm Lab

The text

As transmitted.

026 
WUUS51 KRNK 280350
SVRRNK
VAC009-280430-
/O.NEW.KRNK.SV.W.0123.210728T0350Z-210728T0430Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service BLACKSBURG VA
1150 PM EDT Tue Jul 27 2021

The National Weather Service in BLACKSBURG has issued a

* Severe Thunderstorm Warning for...
  Northeastern Amherst County in central Virginia...

* Until 1230 AM EDT.

* At 1150 PM EDT, a severe thunderstorm was located near Lowesville,
  or 7 miles northeast of Forks Of Buffalo, moving southeast 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...
  Clifford...
  Lowesville...
  and New Glasgow.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail and damaging winds. For your
safety, move to an interior room on the lowest floor of a sturdy
building. Stay away from windows.

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 3759 7900 3773 7918 3780 7913 3778 7911
      3779 7909 3777 7907 3773 7907 3771 7906
      3770 7900 3770 7898 3768 7898 3768 7897
      3767 7897 3763 7894
TIME...MOT...LOC 0350Z 314DEG 14KT 3776 7910 

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

DS

2 follow-up statements

879 
WWUS51 KRNK 280412
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
1212 AM EDT Wed Jul 28 2021

VAC009-280430-
/O.CON.KRNK.SV.W.0123.000000T0000Z-210728T0430Z/
Amherst VA-
1212 AM EDT Wed Jul 28 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1230 AM EDT
FOR NORTHEASTERN AMHERST COUNTY...

At 1211 AM EDT, a severe thunderstorm was located over Lowesville, or
near Clifford, moving southeast at 10 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...
Clifford...
Lowesville...
and New Glasgow.

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, with rates of two to four inches per hour, 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 3759 7900 3771 7915 3777 7907 3773 7907
      3771 7906 3770 7900 3770 7898 3768 7898
      3768 7897 3767 7897 3763 7894
TIME...MOT...LOC 0411Z 323DEG 8KT 3770 7908 

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

DS

591 
WWUS51 KRNK 280429
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
1229 AM EDT Wed Jul 28 2021

VAC009-280439-
/O.EXP.KRNK.SV.W.0123.000000T0000Z-210728T0430Z/
Amherst VA-
1229 AM EDT Wed Jul 28 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN AMHERST COUNTY 
WILL EXPIRE AT 1230 AM 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 gusty
winds and heavy rain are still possible with this thunderstorm.

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 3759 7900 3771 7915 3777 7907 3773 7907
      3771 7906 3770 7900 3770 7898 3768 7898
      3768 7897 3767 7897 3763 7894
TIME...MOT...LOC 0429Z 314DEG 14KT 3765 7902 

$$

DS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 27, 10:32 PM EDT	Special Weather Statement	RNK	Bedford	28 min
Jul 27, 10:55 PM EDT	Special Weather Statement	RNK	City of Salem	35 min
Jul 27, 11:04 PM EDT	Special Weather Statement	RNK	Bedford	26 min
Jul 27, 11:22 PM EDT	Special Weather Statement	RNK	Amherst	23 min
Jul 27, 11:35 PM EDT	Special Weather Statement	RNK	Bedford	25 min
Jul 27, 11:51 PM EDT	Severe Thunderstorm Warning	RNK	Bedford	54 min
Jul 28, 12:06 AM EDT	Areal Flood Advisory	RNK	Bedford	2 hr
Jul 28, 12:09 AM EDT	Special Weather Statement	RNK	Bedford	36 min
Jul 28, 12:21 AM EDT	Severe Thunderstorm Warning	RNK	Bedford, Campbell	54 min
Jul 28, 12:31 AM EDT	Special Weather Statement	RNK	Buckingham	29 min
Jul 28, 12:33 AM EDT	Special Weather Statement	RNK	Amherst	27 min
Jul 28, 12:47 AM EDT	Severe Thunderstorm Warning	RNK	Buckingham	43 min
Jul 28, 12:52 AM EDT	Flash Flood Warning	RNK	Bedford	93 min
Jul 28, 1:09 AM EDT	Special Weather Statement	RNK	Bedford	51 min
Jul 28, 1:21 AM EDT	Special Weather Statement	RNK	Appomattox	24 min
Jul 28, 1:47 AM EDT	Special Weather Statement	RNK	Appomattox	28 min
Jul 28, 2:14 AM EDT	Special Weather Statement	RNK	Appomattox	31 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.