Alert archive / Virginia / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 247, NWS Blacksburg, VA

August 22, 20195 counties in Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at Aug 22, 2019, 4:07 PM EDT for 5 counties in Virginia. It was in force for 53 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 22, 2019, 4:07 PM EDT (20:07 UTC)
Expired: Aug 22, 2019, 5:00 PM EDT
In force: 53 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Appomattox County, VA, Campbell County, VA, Charlotte County, VA, Halifax County, VA, Pittsylvania County, VA

The radar

The Roanoke radar (KFCX), 115 km from the middle of the area, began a volume at 20:08 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, 8.1 hours before the alert went out and 50 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: 626 J/kg
Mixed-layer CIN: -46 J/kg
Mixed-layer LCL: 860 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: -38 m²/s²
0-3 km storm-relative helicity: -47 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.4

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 22, 3:32 PM EDT, 35 minutes earlier.

Area forecast discussion, Aug 22, 3:32 PM EDT, 35 minutes before

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Hazardous weather outlook, Aug 22, 3:48 PM EDT, 19 minutes before

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In the hours before

Local storm report, Aug 22, 3:21 PM EDT, 46 minutes before

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Local storm report, Aug 22, 3:23 PM EDT, 44 minutes before

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Special weather statement, Aug 22, 3:23 PM EDT, 44 minutes before

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Local storm report, Aug 22, 3:24 PM EDT, 43 minutes before

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Special weather statement, Aug 22, 3:50 PM EDT, 17 minutes before

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Local storm report, Aug 22, 3:55 PM EDT, 12 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 22, 12:19 AM EDT	Special Weather Statement	RNK	City of Danville	41 min
Aug 22, 10:48 AM EDT	Special Weather Statement	RNK	Tazewell	42 min
Aug 22, 12:02 PM EDT	Special Weather Statement	RNK	Bland, Giles, Smyth, Tazewell	58 min
Aug 22, 1:06 PM EDT	Severe Thunderstorm Warning	RNK	Botetourt, Craig	39 min
Aug 22, 1:12 PM EDT	Severe Thunderstorm Warning	RNK	Giles, Montgomery, Pulaski, City of Radford	48 min
Aug 22, 1:29 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Bath, Botetourt, Rockbridge, City of Buena Vista, City of Covington and 1 more	61 min
Aug 22, 1:38 PM EDT	Special Weather Statement	RNK	Grayson, Smyth, Wythe, City of Galax	52 min
Aug 22, 1:48 PM EDT	Severe Thunderstorm Warning	RNK	Bedford, Botetourt, Floyd, Franklin, Montgomery, Roanoke and 2 more	57 min
Aug 22, 2:21 PM EDT	Special Weather Statement	RNK	Franklin, Henry, Patrick, City of Martinsville	54 min
Aug 22, 2:24 PM EDT	Severe Thunderstorm Warning	RNK	Franklin, Henry, City of Martinsville	66 min
Aug 22, 2:30 PM EDT	Special Weather Statement	RNK	Carroll, Grayson, Wythe, City of Galax	60 min
Aug 22, 2:32 PM EDT	Severe Thunderstorm Warning	RNK	Amherst, Bedford, Botetourt, Rockbridge, City of Buena Vista, City of Lexington and 1 more	58 min
Aug 22, 2:38 PM EDT	Severe Thunderstorm Warning	RNK	Carroll, Floyd, Grayson, Patrick, City of Galax	67 min
Aug 22, 2:42 PM EDT	Special Weather Statement	RNK	Bland	63 min
Aug 22, 2:47 PM EDT	Special Weather Statement	RNK	Bedford	58 min
Aug 22, 2:54 PM EDT	Severe Thunderstorm Warning	RNK	Bedford, Franklin, Henry, Patrick, City of Lynchburg, City of Martinsville	66 min
Aug 22, 3:31 PM EDT	Severe Thunderstorm Warning	RNK	Amherst, Appomattox, Bedford, Buckingham, Campbell, Franklin and 4 more	74 min
Aug 22, 3:50 PM EDT	Special Weather Statement	RNK	Craig, Giles, Montgomery, City of Radford	55 min
Aug 22, 4:41 PM EDT	Severe Thunderstorm Warning	RNK	Appomattox, Buckingham, Campbell, Pittsylvania, City of Danville	49 min
Aug 22, 4:51 PM EDT	Special Weather Statement	RNK	Alleghany, Botetourt, Craig, Roanoke, City of Covington, City of Roanoke and 1 more	54 min
Aug 22, 5:01 PM EDT	Severe Thunderstorm Warning	RNK	Charlotte, Halifax	59 min
Aug 22, 6:12 PM EDT	Special Weather Statement	RNK	Rockbridge, City of Buena Vista, City of Lexington	33 min
Aug 22, 1:02 PM EDT	Special Weather Statement	RNK	Wilkes	58 min
Aug 22, 2:11 PM EDT	Severe Thunderstorm Warning	RNK	Wilkes, Yadkin	64 min
Aug 22, 3:23 PM EDT	Special Weather Statement	RNK	Stokes	52 min
Aug 22, 4:13 PM EDT	Severe Thunderstorm Warning	RNK	Caswell, Rockingham, Stokes	62 min
Aug 22, 5:13 PM EDT	Severe Thunderstorm Warning	RNK	Caswell	17 min

Nearby

Severe Thunderstorm Warnings in 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.