Alert archive / Virginia / Special Weather Statements in 2020

Special Weather Statement, NWS Blacksburg, VA

August 15, 2020Wythe County, Virginia

NWS Blacksburg, VA issued this special weather statement at Aug 15, 2020, 3:21 PM EDT for Wythe County, Virginia. It was in force for 24 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: Aug 15, 2020, 3:21 PM EDT (19:21 UTC)
Expired: Aug 15, 2020, 3:45 PM EDT
In force: 24 min
Issued by: NWS Blacksburg, VA

County Wythe County, VA

The radar

The Roanoke radar (KFCX), 67 km from the middle of the area, began a volume at 19:23 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

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 7.4 hours before the alert went out and 127 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: 585 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 521 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 45 m²/s²
0-3 km storm-relative helicity: 61 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

Open this sounding in Storm Lab

The text

As transmitted.

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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 15, 8:16 AM EDT	Areal Flood Advisory	RNK	Charlotte, Halifax	3 hr
Aug 15, 11:18 AM EDT	Special Weather Statement	RNK	Tazewell	27 min
Aug 15, 11:57 AM EDT	Areal Flood Advisory	RNK	Smyth, Tazewell	3 hr
Aug 15, 1:11 PM EDT	Special Weather Statement	RNK	Smyth	34 min
Aug 15, 2:18 PM EDT	Areal Flood Advisory	RNK	Smyth	3 hr
Aug 15, 2:21 PM EDT	Areal Flood Advisory	RNK	Wythe	3 hr
Aug 15, 2:41 PM EDT	Special Weather Statement	RNK	Grayson, Wythe	34 min
Aug 15, 3:07 PM EDT	Areal Flood Advisory	RNK	Grayson, Wythe	3 hr
Aug 15, 3:42 PM EDT	Special Weather Statement	RNK	City of Galax	33 min
Aug 15, 3:57 PM EDT	Areal Flood Advisory	RNK	Carroll, Grayson, Wythe, City of Galax	3 hr
Aug 15, 4:08 PM EDT	Special Weather Statement	RNK	City of Galax	37 min
Aug 15, 5:36 PM EDT	Areal Flood Advisory	RNK	Carroll, Floyd, Montgomery, Pulaski, City of Radford	3 hr
Aug 15, 5:45 PM EDT	Special Weather Statement	RNK	Patrick	30 min
Aug 15, 6:18 PM EDT	Areal Flood Warning	RNK	Carroll, Grayson, Wythe	3 hr
Aug 15, 6:28 PM EDT	Special Weather Statement	RNK	Patrick	32 min
Aug 15, 7:05 PM EDT	Areal Flood Warning	RNK	Pulaski	9 hr
Aug 15, 7:10 PM EDT	Special Weather Statement	RNK	Henry	35 min
Aug 14, 8:08 PM EDT	Special Weather Statement	RNK	Ashe	37 min
Aug 14, 8:37 PM EDT	Areal Flood Advisory	RNK	Ashe	3 hr
Aug 14, 10:33 PM EDT	Areal Flood Advisory	RNK	Caswell, Rockingham	3 hr
Aug 14, 10:41 PM EDT	Areal Flood Advisory	RNK	Alleghany, Surry, Watauga, Wilkes, Yadkin	4 hr
Aug 15, 2:56 PM EDT	Special Weather Statement	RNK	Wilkes	34 min
Aug 15, 3:25 PM EDT	Special Weather Statement	RNK	Alleghany	35 min
Aug 15, 3:51 PM EDT	Special Weather Statement	RNK	Rockingham	24 min
Aug 15, 4:19 PM EDT	Special Weather Statement	RNK	Wilkes	26 min
Aug 15, 4:36 PM EDT	Special Weather Statement	RNK	Surry	24 min
Aug 15, 4:50 PM EDT	Special Weather Statement	RNK	Wilkes	25 min
Aug 15, 5:03 PM EDT	Special Weather Statement	RNK	Surry	27 min
Aug 15, 5:19 PM EDT	Special Weather Statement	RNK	Wilkes	26 min

Nearby

Special Weather Statements in Virginia, 2020 Every special weather statement in 2020

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.