Alert archive / Virginia / Severe Thunderstorm Warnings in 2013
Severe Thunderstorm Warning 193, NWS Blacksburg, VA
NWS Blacksburg, VA issued this severe thunderstorm warning at Oct 7, 2013, 8:56 AM EDT for Henry County, Pittsylvania County, Virginia. It was in force for 34 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
- Oct 7, 2013, 8:56 AM EDT (12:56 UTC)
- Expired
- Oct 7, 2013, 9:30 AM EDT
- In force
- 34 min
- Issued by
- NWS Blacksburg, VA
- Area
- Storm-based polygon
Counties Henry County, VA, Pittsylvania County, VA
The radar
The Roanoke radar (KFCX), 60 km from the middle of the area, began a volume at 12:58 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, 0.9 hours before the alert went out and 316 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.
- Mixed-layer CAPE
- 121 J/kg
- Mixed-layer CIN
- -5 J/kg
- Mixed-layer LCL
- 668 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 135 m²/s²
- 0-3 km storm-relative helicity
- 191 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.1
The office that day
Everything else NWS Blacksburg, VA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 7, 4:16 AM EDT | Special Weather Statement | RNK | Botetourt, Floyd, Montgomery, Roanoke, City of Roanoke, City of Salem | 59 min |
| Oct 7, 4:28 AM EDT | Special Weather Statement | RNK | Carroll, City of Galax | 62 min |
| Oct 7, 5:26 AM EDT | Special Weather Statement | RNK | Floyd, Montgomery, Patrick, Roanoke, City of Roanoke, City of Salem | 64 min |
| Oct 7, 6:31 AM EDT | Special Weather Statement | RNK | Amherst, Rockbridge, City of Buena Vista, City of Lexington | 29 min |
| Oct 7, 6:35 AM EDT | Special Weather Statement | RNK | Bedford, Franklin, Henry, City of Martinsville | 55 min |
| Oct 7, 7:32 AM EDT | Special Weather Statement | RNK | Amherst, Bedford, City of Buena Vista, City of Lynchburg | 58 min |
| Oct 7, 8:05 AM EDT | Special Weather Statement | RNK | Henry, City of Martinsville | 40 min |
| Oct 7, 8:50 AM EDT | Special Weather Statement | RNK | Pittsylvania, City of Danville | 40 min |
| Oct 7, 9:10 AM EDT | Tornado Warning | RNK | Pittsylvania, City of Danville | 35 min |
| Oct 7, 9:33 AM EDT | Special Weather Statement | RNK | Appomattox, Buckingham, Campbell, Charlotte | 42 min |
| Oct 7, 9:45 AM EDT | Special Weather Statement | RNK | Halifax, City of Danville | 30 min |
| Oct 7, 3:35 AM EDT | Special Weather Statement | RNK | Surry, Wilkes, Yadkin | 55 min |
Nearby
Severe Thunderstorm Warnings in Virginia, 2013Every severe thunderstorm warning in 2013
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.