Alert archive / North Carolina / Mesoscale Discussions in 2005

Mesoscale Discussion 367

March 23, 200554 counties in North Carolina; Chesterfield County, Dillon County, Marlboro County, South Carolina; 20 counties in Virginia

The Storm Prediction Center issued this mesoscale discussion at Mar 23, 2005, 12:42 PM EST for 54 counties in North Carolina; Chesterfield County, Dillon County, Marlboro County, South Carolina; 20 counties in Virginia. It was in force for 93 min.

The area

The outline as issued.

The facts

Issued: Mar 23, 2005, 12:42 PM EST (17:42 UTC)
Expired: Mar 23, 2005, 2:15 PM EST
In force: 93 min
Issued by: the Storm Prediction Center

All 77 counties

Anson County, NC, Beaufort County, NC, Bertie County, NC, Bladen County, NC, Brunswick County, NC, Camden County, NC, Carteret County, NC, Chatham County, NC, Chowan County, NC, Columbus County, NC, Craven County, NC, Cumberland County, NC, Currituck County, NC, Dare County, NC, Duplin County, NC, Durham County, NC, Edgecombe County, NC, Franklin County, NC, Gates County, NC, Granville County, NC, Greene 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, New Hanover County, NC, Northampton County, NC, Onslow County, NC, Orange County, NC, Pamlico County, NC, Pasquotank County, NC, Pender County, NC, Perquimans County, NC, Pitt County, NC, Richmond County, NC, Robeson County, NC, Sampson County, NC, Scotland County, NC, Tyrrell County, NC, Vance County, NC, Wake County, NC, Warren County, NC, Washington County, NC, Wayne County, NC, Wilson County, NC, Chesterfield County, SC, Dillon County, SC, Marlboro County, SC, Brunswick County, VA, City of Chesapeake, VA, City of Emporia, VA, City of Franklin, VA, City of Hampton, VA, City of Newport News, VA, City of Norfolk, VA, City of Poquoson, VA, City of Portsmouth, VA, City of Suffolk, VA, City of Virginia Beach, VA, City of Williamsburg, VA, Greensville County, VA, Isle of Wight County, VA, James City County, VA, Northampton County, VA, Southampton County, VA, Surry County, VA, Sussex County, VA, York County, VA

The radar

The Raleigh/Durham radar (KRAX), 68 km from the middle of the area, began a volume at 17:42 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

Newport, NC (KMHX), launched 12:00Z, 5.7 hours before the alert went out and 124 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: 36 J/kg
Mixed-layer CIN: -211 J/kg
Mixed-layer LCL: 733 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 72 m²/s²
0-3 km storm-relative helicity: 119 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
ACUS11 KWNS 231742
SWOMCD
SPC MCD 231742 
NCZ000-VAZ000-SCZ000-231915-

MESOSCALE DISCUSSION 0367
NWS STORM PREDICTION CENTER NORMAN OK
1142 AM CST WED MAR 23 2005

AREAS AFFECTED...CENTRAL/ERN NC AND SERN VA

CONCERNING...SEVERE THUNDERSTORM POTENTIAL 

VALID 231742Z - 231915Z

MUCH OF CENTRAL INTO ERN NC AND SERN VA IS BEING MONITORED FOR A WW.


OBJECTIVE ANALYSES SHOW AIR MASS IS DESTABILIZING...ALTHOUGH WEAKLY
UNSTABLE ATTM WITH MLCAPE AROUND 500 J/KG...ACROSS NRN SC INTO SRN
NC.  VIS IMAGERY INDICATED AN INCREASE IN THE CU FIELD ALONG/E OF
SURFACE TROUGH WHICH EXTENDED FROM A SURFACE LOW 25 E GSO SWWD TO 30
SE CLT TO 35 SE AHN.  ADDITIONAL SURFACE HEATING ALONG/E OF THIS
TROUGH IS EXPECTED TO RESULT IN FURTHER DESTABILIZATION ACROSS
CENTRAL INTO ERN NC AND SERN VA.  NWD EXTENT FOR DECREASING
CLOUDINESS IS EXPECTED TO BE DELINEATED BY A WARM FRONT WHICH
EXTENDED NEWD FROM THE SURFACE LOW TO SRN DELMARVA.  STRONG
UNIDIRECTIONAL DEEP LAYER SPEED SHEAR WILL SUPPORT ORGANIZED SEVERE
STORMS AS THE INSTABILITY BECOMES STRONG ENOUGH TO SUPPORT SUSTAINED
UPDRAFTS E OF THE SURFACE LOW AND SURFACE TROUGH.

..PETERS.. 03/23/2005

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

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

34838062 35897958 36597819 37377682 37437564 36437546
35127526 34287689 33647831

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 23, 11:41 AM EST	Mesoscale Discussion	SPC	Avery, Buncombe, Cherokee, Clay, Graham, Haywood and 6 more	64 min
Mar 23, 4:50 PM EST	Mesoscale Discussion	SPC	Alamance, Anson, Beaufort, Bertie, Cabarrus, Camden and 60 more	55 min
Mar 23, 5:25 PM EST	Severe Thunderstorm Watch	SPC	Alamance, Beaufort, Bertie, Camden, Caswell, Chatham and 35 more	6 hr
Mar 22, 7:24 PM EST	Mesoscale Discussion	SPC	Beaufort, Berkeley, Charleston, Colleton	36 min
Mar 23, 4:16 AM EST	Mesoscale Discussion	SPC	Aiken, Allendale, Bamberg, Barnwell, Edgefield, Lexington and 2 more	89 min

Nearby

Mesoscale Discussions in North Carolina, 2005 Mesoscale Discussions in Virginia, 2005 Mesoscale Discussions in South Carolina, 2005 Every mesoscale discussion in 2005

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.