Alert archive / North Carolina / Severe Thunderstorm Watches in 2012

Severe Thunderstorm Watch 442

July 1, 201257 counties in North Carolina; 12 counties in Virginia

The Storm Prediction Center issued this severe thunderstorm watch at Jul 1, 2012, 12:56 PM EDT for 57 counties in North Carolina; 12 counties in Virginia. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued: Jul 1, 2012, 12:56 PM EDT (16:56 UTC)
Expired: Jul 1, 2012, 8:00 PM EDT
In force: 7 hr
Issued by: the Storm Prediction Center
Largest hail expected: 2 in
Strongest gust expected: 60 kt

All 69 counties

Alamance County, NC, Anson County, NC, Beaufort County, NC, Bertie County, NC, Camden County, NC, Carteret County, NC, Caswell County, NC, Chatham County, NC, Chowan County, NC, Craven County, NC, Cumberland County, NC, Currituck County, NC, Dare County, NC, Davidson County, NC, Duplin County, NC, Durham County, NC, Edgecombe County, NC, Forsyth County, NC, Franklin County, NC, Gates County, NC, Granville County, NC, Greene County, NC, Guilford County, NC, Halifax County, NC, Harnett County, NC, Hertford County, NC, Hoke County, NC, Hyde County, NC, Johnston County, NC, Jones County, NC, Lee County, NC, Lenoir County, NC, Martin County, NC, Montgomery County, NC, Moore County, NC, Nash County, NC, Northampton County, NC, Onslow County, NC, Orange County, NC, Pamlico County, NC, Pasquotank County, NC, Perquimans County, NC, Person County, NC, Pitt County, NC, Randolph County, NC, Richmond County, NC, Rockingham County, NC, Sampson County, NC, Scotland County, NC, Stanly County, NC, Tyrrell County, NC, Vance County, NC, Wake County, NC, Warren County, NC, Washington County, NC, Wayne County, NC, Wilson County, NC, Brunswick County, VA, Charlotte County, VA, City of Danville, VA, City of Emporia, VA, City of Martinsville, VA, Franklin County, VA, Greensville County, VA, Halifax County, VA, Henry County, VA, Lunenburg County, VA, Mecklenburg County, VA, Pittsylvania County, VA

The radar

The Raleigh/Durham radar (KRAX), 49 km from the middle of the area, began a volume at 16:58 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.

What SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes: 10%
One or more EF2 to EF5 tornadoes: 5%
Ten or more severe wind reports: 80%
One or more gusts of 65 knots or more: 60%
Ten or more severe hail reports: 60%
One or more hailstones of 2 inches or more: 30%
Six or more combined severe hail and wind reports: 95%

Warnings issued inside it

33 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
Jul 1, 1:22 PM EDT	Severe Thunderstorm Warning	RNK	Campbell, Charlotte, Halifax, Pittsylvania	36 min
Jul 1, 1:41 PM EDT	Severe Thunderstorm Warning	RAH	Alamance, Durham, Granville, Guilford, Orange, Person and 1 more	64 min
Jul 1, 1:45 PM EDT	Severe Thunderstorm Warning	RNK	Caswell	60 min
Jul 1, 2:15 PM EDT	Severe Thunderstorm Warning	RAH	Anson, Richmond	45 min
Jul 1, 2:25 PM EDT	Severe Thunderstorm Warning	AKQ	Mecklenburg	50 min
Jul 1, 2:33 PM EDT	Severe Thunderstorm Warning	RAH	Durham, Franklin, Granville, Vance, Wake, Warren	72 min
Jul 1, 2:37 PM EDT	Severe Thunderstorm Warning	RAH	Harnett, Johnston, Wake	21 min
Jul 1, 2:53 PM EDT	Severe Thunderstorm Warning	MHX	Beaufort, Carteret, Craven, Hyde, Jones, Onslow and 1 more	52 min
Jul 1, 2:54 PM EDT	Severe Thunderstorm Warning	RAH	Cumberland, Hoke	66 min
Jul 1, 2:59 PM EDT	Severe Thunderstorm Warning	RAH	Anson, Richmond, Scotland	61 min
Jul 1, 3:03 PM EDT	Severe Thunderstorm Warning	RAH	Franklin, Johnston, Nash, Wake, Wilson	57 min
Jul 1, 3:07 PM EDT	Severe Thunderstorm Warning	AKQ	Northampton	38 min
Jul 1, 3:16 PM EDT	Severe Thunderstorm Warning	RAH	Edgecombe, Franklin, Halifax, Nash, Wilson	74 min
Jul 1, 3:27 PM EDT	Severe Thunderstorm Warning	RAH	Cumberland, Sampson	78 min
Jul 1, 3:44 PM EDT	Severe Thunderstorm Warning	MHX	Beaufort, Craven, Duplin, Greene, Lenoir, Martin and 1 more	66 min
Jul 1, 3:44 PM EDT	Flash Flood Warning	RAH	Cumberland, Hoke, Sampson	2 hr
Jul 1, 3:48 PM EDT	Severe Thunderstorm Warning	RAH	Johnston, Wayne, Wilson	57 min
Jul 1, 3:49 PM EDT	Severe Thunderstorm Warning	MHX	Carteret, Dare, Hyde	34 min
Jul 1, 3:55 PM EDT	Severe Thunderstorm Warning	RAH	Hoke	35 min
Jul 1, 3:59 PM EDT	Severe Thunderstorm Warning	AKQ	Northampton	46 min
Jul 1, 4:12 PM EDT	Severe Thunderstorm Warning	MHX	Duplin	48 min
Jul 1, 4:24 PM EDT	Tornado Warning	RAH	Sampson	12 min
Jul 1, 4:25 PM EDT	Severe Thunderstorm Warning	MHX	Beaufort, Craven, Duplin, Greene, Hyde, Jones and 2 more	65 min
Jul 1, 4:27 PM EDT	Severe Thunderstorm Warning	AKQ	Bertie, Hertford, Northampton	33 min
Jul 1, 4:36 PM EDT	Severe Thunderstorm Warning	MHX	Dare, Hyde, Tyrrell, Washington	54 min
Jul 1, 4:42 PM EDT	Severe Thunderstorm Warning	RAH	Cumberland, Hoke, Sampson	66 min
Jul 1, 4:48 PM EDT	Severe Thunderstorm Warning	AKQ	Bertie, Chowan	28 min
Jul 1, 4:48 PM EDT	Severe Thunderstorm Warning	MHX	Carteret, Craven, Duplin, Hyde, Lenoir, Onslow and 3 more	57 min
Jul 1, 4:57 PM EDT	Severe Thunderstorm Warning	MHX	Duplin, Onslow	63 min
Jul 1, 5:22 PM EDT	Severe Thunderstorm Warning	MHX	Carteret, Craven, Onslow	53 min
Jul 1, 5:39 PM EDT	Severe Thunderstorm Warning	MHX	Carteret, Dare, Hyde	66 min
Jul 1, 6:37 PM EDT	Severe Thunderstorm Warning	RAH	Anson, Stanly	68 min
Jul 1, 7:52 PM EDT	Severe Thunderstorm Warning	RAH	Anson, Richmond	38 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 4.9 hours before the alert went out and 144 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: -246 J/kg
Mixed-layer LCL: 2188 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 51 m²/s²
0-3 km storm-relative helicity: 61 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 1, 9:27 AM EDT	Mesoscale Discussion	SPC	Alleghany, Ashe, Forsyth, Rockingham, Stokes, Surry and 3 more	63 min
Jul 1, 9:44 AM EDT	Severe Thunderstorm Watch	SPC	Alleghany, Ashe, Caswell, Rockingham, Stokes, Surry and 3 more	5 hr
Jul 1, 11:38 AM EDT	Mesoscale Discussion	SPC	Alamance, Alexander, Alleghany, Ashe, Avery, Caldwell and 12 more	97 min
Jul 1, 1:39 PM EDT	Mesoscale Discussion	SPC	Alexander, Anson, Buncombe, Burke, Cabarrus, Catawba and 24 more	96 min
Jul 1, 2:01 PM EDT	Severe Thunderstorm Watch	SPC	Bladen, Brunswick, Cabarrus, Catawba, Cleveland, Columbus and 12 more	9 hr
Jul 1, 2:53 PM EDT	Mesoscale Discussion	SPC	Beaufort, Bertie, Bladen, Camden, Carteret, Chowan and 37 more	97 min
Jul 1, 4:15 PM EDT	Mesoscale Discussion	SPC	Bladen, Brunswick, Columbus, Duplin, New Hanover, Pender and 3 more	90 min
Jul 1, 7:04 PM EDT	Mesoscale Discussion	SPC	Alamance, Beaufort, Bertie, Camden, Carteret, Caswell and 40 more	56 min
Jul 1, 7:39 PM EDT	Mesoscale Discussion	SPC	Anson, Bladen, Brunswick, Cabarrus, Cleveland, Columbus and 14 more	96 min

Nearby

Severe Thunderstorm Watches in North Carolina, 2012 Severe Thunderstorm Watches in Virginia, 2012 Every severe thunderstorm watch in 2012

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.