Alert archive / Virginia / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 190, NWS Blacksburg, VA

August 17, 2026Grayson County, Smyth County, Virginia; Alleghany County, Ashe County, North Carolina

NWS Blacksburg, VA issued this severe thunderstorm warning at Aug 17, 2026, 3:55 PM EDT for Grayson County, Smyth County, Virginia; Alleghany County, Ashe County, North Carolina. It was in force for 46 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 17, 2026, 3:55 PM EDT (19:55 UTC)
Expired: Aug 17, 2026, 4:41 PM EDT
In force: 46 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Alleghany County, NC, Ashe County, NC, Grayson County, VA, Smyth County, VA

The radar

The Roanoke radar (KFCX), 106 km from the middle of the area, began a volume at 19:55 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Aug 17, 2:35 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 7.9 hours before the alert went out and 380 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: 690 J/kg
Mixed-layer CIN: -23 J/kg
Mixed-layer LCL: 576 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 54 m²/s²
0-3 km storm-relative helicity: 60 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

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 16, 5:13 PM EDT, 22 hours 42 minutes earlier.

Area forecast discussion, Aug 16, 5:13 PM EDT, 22 hours 42 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 16, 8:06 PM EDT	Severe Thunderstorm Warning	RNK	Bedford, Campbell, Charlotte, Halifax, Pittsylvania	29 min
Aug 16, 8:33 PM EDT	Special Weather Statement	RNK	Buckingham	12 min
Aug 16, 8:48 PM EDT	Special Weather Statement	RNK	Buckingham	27 min
Aug 16, 9:15 PM EDT	Special Weather Statement	RNK	Buckingham	30 min
Aug 16, 9:23 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Bath	67 min
Aug 16, 10:06 PM EDT	Special Weather Statement	RNK	Tazewell	24 min
Aug 16, 11:53 PM EDT	Special Weather Statement	RNK	Smyth	52 min
Aug 17, 12:12 AM EDT	Special Weather Statement	RNK	Appomattox, Buckingham, Campbell, Charlotte, City of Lynchburg	48 min
Aug 17, 1:42 PM EDT	Special Weather Statement	RNK	Patrick	33 min
Aug 17, 2:39 PM EDT	Special Weather Statement	RNK	Tazewell	36 min
Aug 17, 3:05 PM EDT	Special Weather Statement	RNK	Smyth, Tazewell	25 min
Aug 17, 3:33 PM EDT	Special Weather Statement	RNK	Smyth	27 min
Aug 17, 3:44 PM EDT	Special Weather Statement	RNK	City of Martinsville	31 min
Aug 17, 7:05 PM EDT	Special Weather Statement	RNK	City of Danville	25 min
Aug 17, 4:50 PM EDT	Special Weather Statement	RNK	Watauga	25 min
Aug 17, 5:40 PM EDT	Special Weather Statement	RNK	Wilkes	20 min
Aug 17, 6:04 PM EDT	Special Weather Statement	RNK	Watauga	41 min
Aug 17, 6:08 PM EDT	Special Weather Statement	RNK	Yadkin	37 min
Aug 17, 6:43 PM EDT	Severe Thunderstorm Warning	RNK	Yadkin	22 min
Aug 16, 8:45 PM EDT	Severe Thunderstorm Warning	RNK	Greenbrier	60 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2026 Severe Thunderstorm Warnings in North Carolina, 2026 Every severe thunderstorm warning in 2026

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.