Alert archive / Virginia / Special Weather Statements in 2017

Special Weather Statement, NWS Blacksburg, VA

April 20, 2017Bedford County, Virginia

NWS Blacksburg, VA issued this special weather statement at Apr 20, 2017, 4:02 PM EDT for Bedford County, Virginia. It was in force for 43 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: Apr 20, 2017, 4:02 PM EDT (20:02 UTC)
Expired: Apr 20, 2017, 4:45 PM EDT
In force: 43 min
Issued by: NWS Blacksburg, VA

County Bedford County, VA

The radar

The Roanoke radar (KFCX), 85 km from the middle of the area, began a volume at 20:05 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

Washington/Dulle, VA (KIAD), launched 12:00Z, 8.0 hours before the alert went out and 249 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: 840 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: 64 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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
Apr 19, 10:27 PM EDT	Dense Fog Advisory	RNK	Alleghany, Bath, Bland, Carroll, Craig, Floyd and 8 more	10 hr
Apr 20, 1:15 PM EDT	Special Weather Statement	RNK	Roanoke, City of Roanoke, City of Salem	45 min
Apr 20, 2:04 PM EDT	Special Weather Statement	RNK	City of Roanoke	41 min
Apr 20, 2:45 PM EDT	Special Weather Statement	RNK	Rockbridge, City of Buena Vista, City of Lexington	60 min
Apr 20, 3:22 PM EDT	Special Weather Statement	RNK	Franklin	38 min
Apr 20, 4:44 PM EDT	Special Weather Statement	RNK	Appomattox, Campbell	46 min
Apr 20, 5:33 PM EDT	Special Weather Statement	RNK	Buckingham	27 min
Apr 20, 3:52 PM EDT	Special Weather Statement	RNK	Stokes	53 min
Apr 20, 2:36 PM EDT	Special Weather Statement	RNK	Greenbrier	39 min

Nearby

Special Weather Statements in Virginia, 2017 Every special weather statement in 2017

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.