Alert archive / West Virginia / Special Weather Statements in 2021

Special Weather Statement, NWS Blacksburg, VA

July 13, 2021Greenbrier County, West Virginia

NWS Blacksburg, VA issued this special weather statement at Jul 13, 2021, 6:21 PM EDT for Greenbrier County, West Virginia. It was in force for 39 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: Jul 13, 2021, 6:21 PM EDT (22:21 UTC)
Expired: Jul 13, 2021, 7:00 PM EDT
In force: 39 min
Issued by: NWS Blacksburg, VA

County Greenbrier County, WV

The radar

The Roanoke radar (KFCX), 78 km from the middle of the area, began a volume at 22:23 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, 10.4 hours before the alert went out and 93 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1339 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: -21 m²/s²
0-3 km storm-relative helicity: 21 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

424 
WWUS81 KRNK 132221
SPSRNK

Special Weather Statement
National Weather Service BLACKSBURG VA
621 PM EDT Tue Jul 13 2021

VAZ019-WVZ507-132300-
Alleghany-Eastern Greenbrier-
621 PM EDT Tue Jul 13 2021

...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN ALLEGHANY COUNTY 
IN WEST CENTRAL VIRGINIA AND SOUTHEASTERN GREENBRIER COUNTIES IN 
SOUTHEASTERN WEST VIRGINIA...

At 620 PM EDT, a strong thunderstorm was located over near Alleghany 
or just southeast of White Sulphur Springs, moving northeast at 15 
mph.

Winds in excess of 30 mph and pea size hail are possible with this
storm.

Locations impacted include...
Alleghany...
White Sulphur Springs...
Roaring Mountain Summit...
Greenbrier State Forest...
Alvon...
Organ Cave...
and Earlehurst.

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.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

LAT...LON 3784 8008 3764 8024 3766 8028 3769 8029
      3769 8033 3770 8035 3771 8034 3771 8035
      3769 8036 3769 8038 3771 8038 3770 8039
      3772 8039 3769 8044 3770 8047 3793 8021
TIME...MOT...LOC 2220Z 233DEG 15KT 3771 8029 

$$

RAB

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 13, 2:09 PM EDT	Special Weather Statement	RNK	Montgomery, Pulaski, City of Radford	36 min
Jul 13, 2:37 PM EDT	Severe Thunderstorm Warning	RNK	Montgomery	38 min
Jul 13, 3:14 PM EDT	Severe Thunderstorm Warning	RNK	Botetourt, Craig, Montgomery, Roanoke	46 min
Jul 13, 3:41 PM EDT	Special Weather Statement	RNK	Wythe	34 min
Jul 13, 3:46 PM EDT	Special Weather Statement	RNK	Alleghany, City of Covington	29 min
Jul 13, 4:00 PM EDT	Special Weather Statement	RNK	Botetourt	30 min
Jul 13, 4:04 PM EDT	Severe Thunderstorm Warning	RNK	Botetourt	41 min
Jul 13, 4:33 PM EDT	Special Weather Statement	RNK	Pulaski	42 min
Jul 13, 5:03 PM EDT	Special Weather Statement	RNK	Pulaski	42 min
Jul 13, 5:21 PM EDT	Special Weather Statement	RNK	Wythe	39 min
Jul 13, 6:00 PM EDT	Special Weather Statement	RNK	Alleghany	45 min
Jul 13, 6:36 PM EDT	Special Weather Statement	RNK	Bath	39 min
Jul 13, 6:53 PM EDT	Special Weather Statement	RNK	Smyth	52 min
Jul 13, 7:40 PM EDT	Special Weather Statement	RNK	Wythe	50 min

Nearby

Special Weather Statements in West Virginia, 2021 Every special weather statement 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.