Alert archive / North Carolina / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 108, NWS Blacksburg, VA

July 13, 2015Caswell County, North Carolina

NWS Blacksburg, VA issued this severe thunderstorm warning at Jul 13, 2015, 9:00 PM EDT for Caswell County, North Carolina. It was in force for 60 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: Jul 13, 2015, 9:00 PM EDT (01:00 UTC)
Expired: Jul 13, 2015, 10:00 PM EDT
In force: 60 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Caswell County, NC

The radar

The Roanoke radar (KFCX), 109 km from the middle of the area, began a volume at 01:03 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
Jul 13, 6:23 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 1.0 hours before the alert went out and 62 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: 1262 J/kg
Mixed-layer CIN: -26 J/kg
Mixed-layer LCL: 1594 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 37 m²/s²
0-3 km storm-relative helicity: 91 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 2.6

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 Jul 13, 8:56 PM EDT, 4 minutes earlier.

Area forecast discussion, Jul 13, 8:56 PM EDT, 4 minutes before

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Hazardous weather outlook, Jul 13, 8:58 PM EDT, 2 minutes before

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In the hours before

Local storm report, Jul 13, 8:28 PM EDT, 32 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BLACKSBURG VA
828 PM EDT MON JUL 13 2015

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0816 PM     TSTM WND DMG     N EDEN                  36.51N 79.74W
07/13/2015                   ROCKINGHAM         NC   911 CALL CENTER

            SIDING AND GUTTERS BLOWN OFF THE BUILDING OF THE EDEN
            RESCUE SQUAD.

&&

HYSELL

Local storm report, Jul 13, 8:33 PM EDT, 27 minutes before

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Special weather statement, Jul 13, 8:37 PM EDT, 23 minutes before

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Local storm report, Jul 13, 8:42 PM EDT, 18 minutes before

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Local storm report, Jul 13, 8:43 PM EDT, 17 minutes before

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Local storm report, Jul 13, 8:48 PM EDT, 12 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
Jul 13, 8:14 PM EDT	Special Weather Statement	RNK	Appomattox, Buckingham	61 min
Jul 13, 8:21 PM EDT	Special Weather Statement	RNK	Amherst, Rockbridge, City of Buena Vista, City of Lexington	54 min
Jul 13, 8:31 PM EDT	Severe Thunderstorm Warning	RNK	Buckingham	59 min
Jul 13, 8:37 PM EDT	Special Weather Statement	RNK	Charlotte	53 min
Jul 13, 8:41 PM EDT	Severe Thunderstorm Warning	RNK	Amherst, Bedford, Botetourt, Campbell, Rockbridge, City of Buena Vista and 2 more	64 min
Jul 13, 8:45 PM EDT	Severe Thunderstorm Warning	RNK	Bedford, Campbell, Pittsylvania, City of Danville	60 min
Jul 13, 8:49 PM EDT	Severe Thunderstorm Warning	RNK	Campbell, Charlotte	56 min
Jul 13, 9:15 PM EDT	Severe Thunderstorm Warning	RNK	Amherst, Appomattox, Campbell, Charlotte, Halifax, Pittsylvania	75 min
Jul 13, 9:59 PM EDT	Special Weather Statement	RNK	Buckingham	61 min
Jul 13, 10:30 PM EDT	Severe Thunderstorm Warning	RNK	Charlotte	28 min
Jul 14, 4:18 AM EDT	Special Weather Statement	RNK	Tazewell	42 min
Jul 14, 4:57 AM EDT	Special Weather Statement	RNK	Bland, Smyth, Tazewell, Wythe	48 min
Jul 14, 5:06 AM EDT	Areal Flood Advisory	RNK	Bland, Smyth, Tazewell	4 hr
Jul 14, 6:00 AM EDT	Special Weather Statement	RNK	Grayson, Smyth, Wythe	60 min
Jul 14, 6:38 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Bath, City of Covington	67 min
Jul 14, 7:07 PM EDT	Special Weather Statement	RNK	Appomattox, City of Lynchburg	53 min
Jul 14, 7:11 PM EDT	Special Weather Statement	RNK	Rockbridge, City of Buena Vista, City of Lexington	64 min
Jul 14, 7:51 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Bath, Botetourt, Craig, Giles, Rockbridge and 2 more	54 min
Jul 14, 7:55 PM EDT	Severe Thunderstorm Warning	RNK	Amherst, Appomattox, Buckingham, Campbell	65 min
Jul 13, 8:07 PM EDT	Severe Thunderstorm Warning	RNK	Stokes, Surry	53 min
Jul 13, 8:23 PM EDT	Severe Thunderstorm Warning	RNK	Caswell	67 min
Jul 13, 8:26 PM EDT	Severe Thunderstorm Warning	RNK	Rockingham	64 min
Jul 14, 6:52 AM EDT	Special Weather Statement	RNK	Watauga, Wilkes	38 min
Jul 14, 2:42 AM EDT	Special Weather Statement	RNK	Mercer, Summers	33 min
Jul 14, 3:21 AM EDT	Special Weather Statement	RNK	Mercer, Summers	39 min
Jul 14, 4:00 AM EDT	Special Weather Statement	RNK	Mercer, Summers	45 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 2015 Every severe thunderstorm warning in 2015

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.