Alert archive / Virginia / Special Weather Statements in 2020

Special Weather Statement, NWS Blacksburg, VA

September 2, 2020Appomattox County, Campbell County, Virginia

NWS Blacksburg, VA issued this special weather statement at Sep 2, 2020, 5:58 PM EDT for Appomattox County, Campbell County, Virginia. It was in force for 32 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: Sep 2, 2020, 5:58 PM EDT (21:58 UTC)
Expired: Sep 2, 2020, 6:30 PM EDT
In force: 32 min
Issued by: NWS Blacksburg, VA

Counties Appomattox County, VA, Campbell County, VA

The radar

The Roanoke radar (KFCX), 129 km from the middle of the area, began a volume at 21:58 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, 10.0 hours before the alert went out and 231 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: 158 J/kg
Mixed-layer CIN: -27 J/kg
Mixed-layer LCL: 488 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 126 m²/s²
0-3 km storm-relative helicity: 173 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.4

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
Sep 2, 4:54 PM EDT	Special Weather Statement	RNK	City of Lynchburg	36 min
Sep 2, 5:28 PM EDT	Special Weather Statement	RNK	Appomattox, Buckingham, Campbell, City of Lynchburg	32 min
Sep 2, 6:32 PM EDT	Special Weather Statement	RNK	Campbell	28 min
Sep 2, 7:01 PM EDT	Special Weather Statement	RNK	Halifax	29 min
Sep 2, 7:30 PM EDT	Special Weather Statement	RNK	Pittsylvania	30 min
Sep 2, 7:36 PM EDT	Areal Flood Advisory	RNK	Bedford, Campbell, Charlotte, Halifax, Pittsylvania	2 hr
Sep 2, 1:26 PM EDT	Special Weather Statement	RNK	Mercer	49 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.