Alert archive / Virginia / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 214, NWS Blacksburg, VA

August 13, 2019Bland County, Tazewell County, Virginia; Mercer County, West Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at Aug 13, 2019, 4:01 PM EDT for Bland County, Tazewell County, Virginia; Mercer County, West Virginia. It was in force for 29 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Aug 13, 2019, 4:01 PM EDT (20:01 UTC)
Expired: Aug 13, 2019, 4:30 PM EDT
In force: 29 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Bland County, VA, Tazewell County, VA, Mercer County, WV

The radar

The Roanoke radar (KFCX), 91 km from the middle of the area, began a volume at 20:01 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, 8.0 hours before the alert went out and 176 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: 560 J/kg
Mixed-layer CIN: -74 J/kg
Mixed-layer LCL: 941 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 93 m²/s²
0-3 km storm-relative helicity: 107 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 0.8

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Blacksburg, VA wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 13, 2:56 PM EDT, 1 hour 5 minutes earlier.

Area forecast discussion, Aug 13, 2:56 PM EDT, 1 hour 5 minutes before

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Hazardous weather outlook, Aug 13, 3:30 PM EDT, 31 minutes before

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In the hours before

Local storm report, Aug 13, 3:29 PM EDT, 32 minutes before

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Local storm report, Aug 13, 3:45 PM EDT, 16 minutes before

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Local storm report, Aug 13, 3:49 PM EDT, 12 minutes before

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Local storm report, Aug 13, 3:50 PM EDT, 11 minutes before

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Special weather statement, Aug 13, 3:50 PM EDT, 11 minutes before

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Local storm report, Aug 13, 4:01 PM EDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 13, 12:57 PM EDT	Special Weather Statement	RNK	Wythe	48 min
Aug 13, 1:01 PM EDT	Severe Thunderstorm Warning	RNK	Carroll, Grayson, Smyth, Wythe, City of Galax	59 min
Aug 13, 1:23 PM EDT	Special Weather Statement	RNK	Floyd, Henry	52 min
Aug 13, 1:41 PM EDT	Severe Thunderstorm Warning	RNK	Carroll, Floyd, Grayson, Patrick, Wythe	64 min
Aug 13, 1:56 PM EDT	Severe Thunderstorm Warning	RNK	Grayson, Smyth	64 min
Aug 13, 2:07 PM EDT	Severe Thunderstorm Warning	RNK	Franklin, Henry, Patrick, Pittsylvania, City of Martinsville	53 min
Aug 13, 2:31 PM EDT	Severe Thunderstorm Warning	RNK	Carroll, Patrick	29 min
Aug 13, 2:41 PM EDT	Severe Thunderstorm Warning	RNK	Halifax, Pittsylvania	52 min
Aug 13, 2:54 PM EDT	Severe Thunderstorm Warning	RNK	Halifax, Henry, Patrick, Pittsylvania, City of Danville, City of Martinsville	51 min
Aug 13, 3:07 PM EDT	Special Weather Statement	RNK	Charlotte	23 min
Aug 13, 3:26 PM EDT	Severe Thunderstorm Warning	RNK	Charlotte	37 min
Aug 13, 3:30 PM EDT	Severe Thunderstorm Warning	RNK	Halifax	57 min
Aug 13, 3:50 PM EDT	Special Weather Statement	RNK	Appomattox	25 min
Aug 13, 2:51 PM EDT	Severe Thunderstorm Warning	RNK	Caswell, Rockingham	54 min
Aug 13, 2:59 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Stokes, Surry, Watauga, Wilkes, Yadkin	91 min
Aug 13, 3:39 PM EDT	Severe Thunderstorm Warning	RNK	Caswell, Rockingham, Stokes	71 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2019 Severe Thunderstorm Warnings in West Virginia, 2019 Every severe thunderstorm warning in 2019

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.