Alert archive / North Carolina / Mesoscale Discussions in 2012

Mesoscale Discussion 1016

June 1, 201246 counties in North Carolina; 22 counties in South Carolina

The Storm Prediction Center issued this mesoscale discussion at Jun 1, 2012, 7:42 PM EDT for 46 counties in North Carolina; 22 counties in South Carolina. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jun 1, 2012, 7:42 PM EDT (23:42 UTC)
Expired: Jun 1, 2012, 9:45 PM EDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 68 counties

Alamance County, NC, Anson County, NC, Beaufort County, NC, Bertie County, NC, Bladen County, NC, Brunswick County, NC, Carteret County, NC, Chatham County, NC, Chowan County, NC, Columbus County, NC, Craven County, NC, Cumberland County, NC, Dare County, NC, Duplin County, NC, Durham County, NC, Edgecombe County, NC, Franklin County, NC, Greene County, NC, Harnett 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, New Hanover County, NC, Onslow County, NC, Orange County, NC, Pamlico County, NC, Pender County, NC, Perquimans County, NC, Pitt County, NC, Randolph County, NC, Richmond County, NC, Robeson County, NC, Sampson County, NC, Scotland County, NC, Tyrrell County, NC, Wake County, NC, Washington County, NC, Wayne County, NC, Wilson County, NC, Bamberg County, SC, Barnwell County, SC, Berkeley County, SC, Calhoun County, SC, Charleston County, SC, Chesterfield County, SC, Clarendon County, SC, Colleton County, SC, Darlington County, SC, Dillon County, SC, Dorchester County, SC, Florence County, SC, Georgetown County, SC, Horry County, SC, Kershaw County, SC, Lee County, SC, Marion County, SC, Marlboro County, SC, Orangeburg County, SC, Richland County, SC, Sumter County, SC, Williamsburg County, SC

The nearest sounding before it

Newport, NC (KMHX), launched 12:00Z, 11.7 hours before the alert went out and 120 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: 1203 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 581 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 87 m²/s²
0-3 km storm-relative helicity: 98 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 3.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

686 
ACUS11 KWNS 012343
SWOMCD
SPC MCD 012342
NCZ000-SCZ000-020145-

MESOSCALE DISCUSSION 1016
NWS STORM PREDICTION CENTER NORMAN OK
0642 PM CDT FRI JUN 01 2012

AREAS AFFECTED...CNTRL/ERN NC AND ERN SC

CONCERNING...SEVERE THUNDERSTORM WATCH 334...

VALID 012342Z - 020145Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 334
CONTINUES.

SUMMARY...SEVERE WIND THREAT WILL CONTINUE INTO THE LATE EVENING
HOURS. A LOCAL EXTENSION IN TIME MAY NEED TO BE CONSIDERED FOR WW
334 OR A NEW SEVERE THUNDERSTORM WATCH MAY BE ISSUED FOR PORTIONS OF
THE MCD AREA.

DISCUSSION...AT LEAST A MARGINAL SEVERE THREAT IS EXPECTED TO
CONTINUE FOR SEVERAL HOURS THIS EVENING. 23Z MESOANALYSIS SHOWED
MODERATE MLCAPE ACROSS THE REGION WITH STRONG DEEP LAYER SHEAR
PERSISTING AHEAD OF SFC COLD FRONT/UPPER TROUGH PASSAGE. A BROKEN
BAND OF STORMS WAS CURRENTLY PRODUCING SPORADIC STRONG/DAMAGING WIND
GUSTS ALONG A PRE-FRONTAL TROUGH FROM E-CNTRL NC SWD TOWARD THE SC
COAST. FARTHER WEST...JUST AHEAD OF THE SFC COLD FRONT THUNDERSTORMS
WERE INTENSIFYING ACROSS N-CNTRL SC INTO S-CNTRL NC. GIVEN THE
AFOREMENTIONED FAVORABLE DOWNSTREAM CONDITIONS ALONG WITH STEEP LOW
LEVEL LAPSE RATES...A SEVERE WIND THREAT WILL CONTINUE INTO THE LATE
EVENING HOURS. AN EXTENSION IN TIME MAY NEED TO BE CONSIDERED FOR WW
334 OR A NEW SEVERE THUNDERSTORM WATCH MAY NEED TO BE CONSIDERED FOR
PORTIONS OF THE MCD AREA.

..LEITMAN/CORFIDI.. 06/01/2012

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...AKQ...MHX...RAH...ILM...CHS...CAE...GSP...

LAT...LON   36187971 36217538 35467515 34907553 34297637 32307985
            32458036 33208148 36187971

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 1, 1:03 PM EDT	Mesoscale Discussion	SPC	Bertie, Camden, Chowan, Currituck, Edgecombe, Franklin and 13 more	87 min
Jun 1, 1:28 PM EDT	Tornado Watch	SPC	Alleghany, Ashe, Caswell, Rockingham, Stokes, Surry and 3 more	8 hr
Jun 1, 1:50 PM EDT	Tornado Watch	SPC	Bertie, Camden, Chowan, Currituck, Gates, Granville and 8 more	7 hr
Jun 1, 1:54 PM EDT	Mesoscale Discussion	SPC	Anson, Bladen, Brunswick, Chatham, Columbus, Craven and 23 more	66 min
Jun 1, 2:13 PM EDT	Severe Thunderstorm Watch	SPC	Alamance, Anson, Beaufort, Bladen, Brunswick, Carteret and 41 more	8 hr
Jun 1, 3:35 PM EDT	Mesoscale Discussion	SPC	Alleghany, Ashe, Forsyth, Rockingham, Stokes, Surry and 2 more	55 min
Jun 1, 3:49 PM EDT	Mesoscale Discussion	SPC	Granville, Halifax, Northampton, Person, Vance, Warren	56 min
Jun 1, 4:31 PM EDT	Mesoscale Discussion	SPC	Alamance, Anson, Beaufort, Bertie, Bladen, Brunswick and 44 more	59 min
Jun 1, 6:54 PM EDT	Mesoscale Discussion	SPC	Bertie, Camden, Chowan, Currituck, Gates, Granville and 8 more	2 hr

Nearby

Mesoscale Discussions in North Carolina, 2012 Mesoscale Discussions in South Carolina, 2012 Every mesoscale discussion 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.