Alert archive / North Carolina / Mesoscale Discussions in 2005

Mesoscale Discussion 913

May 19, 20054 states

The Storm Prediction Center issued this mesoscale discussion at May 19, 2005, 2:44 PM EDT for 4 states. It was in force for 91 min.

The area

The outline as issued.

The facts

Issued: May 19, 2005, 2:44 PM EDT (18:44 UTC)
Expired: May 19, 2005, 4:15 PM EDT
In force: 91 min
Issued by: the Storm Prediction Center

All 83 counties

Columbia County, GA, Elbert County, GA, Hart County, GA, Lincoln County, GA, McDuffie County, GA, Richmond County, GA, Taliaferro County, GA, Warren County, GA, Wilkes County, GA, Alamance County, NC, Alexander County, NC, Anson County, NC, Cabarrus County, NC, Caswell County, NC, Catawba County, NC, Chatham County, NC, Cleveland County, NC, Davidson County, NC, Davie County, NC, Durham County, NC, Forsyth County, NC, Gaston County, NC, Granville County, NC, Guilford County, NC, Hoke County, NC, Iredell County, NC, Lee County, NC, Lincoln County, NC, Mecklenburg County, NC, Montgomery County, NC, Moore County, NC, Orange County, NC, Person County, NC, Randolph County, NC, Richmond County, NC, Rockingham County, NC, Rowan County, NC, Rutherford County, NC, Scotland County, NC, Stanly County, NC, Stokes County, NC, Union County, NC, Yadkin County, NC, Abbeville County, SC, Aiken County, SC, Anderson County, SC, Cherokee County, SC, Chester County, SC, Chesterfield County, SC, Darlington County, SC, Edgefield County, SC, Fairfield County, SC, Greenville County, SC, Greenwood County, SC, Kershaw County, SC, Lancaster County, SC, Laurens County, SC, Lee County, SC, Lexington County, SC, Marlboro County, SC, McCormick County, SC, Newberry County, SC, Richland County, SC, Saluda County, SC, Spartanburg County, SC, Union County, SC, York County, SC, Appomattox County, VA, Bedford County, VA, Botetourt County, VA, Campbell County, VA, Charlotte County, VA, City of Danville, VA, City of Lynchburg, VA, City of Martinsville, VA, City of Roanoke, VA, City of Salem, VA, Franklin County, VA, Halifax County, VA, Henry County, VA, Patrick County, VA, Pittsylvania County, VA, Prince Edward County, VA

The radar

The Greer radar (KGSP), 142 km from the middle of the area, began a volume at 18:48 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

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 6.7 hours before the alert went out and 107 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1381 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 68 m²/s²
0-3 km storm-relative helicity: 86 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 191844
SWOMCD
SPC MCD 191844 
VAZ000-NCZ000-SCZ000-GAZ000-192015-

MESOSCALE DISCUSSION 0913
NWS STORM PREDICTION CENTER NORMAN OK
0144 PM CDT THU MAY 19 2005

AREAS AFFECTED...WRN/CNTRL PORTIONS OF VA/NC/SC INTO NE GA

CONCERNING...SEVERE THUNDERSTORM POTENTIAL 

VALID 191844Z - 192015Z

TSTMS WILL CONTINUE TO EVOLVE AND SPREAD E/SE THROUGH THE PIEDMONT
REGION OF VA/NC/SC...WITH THREAT FOR ISOLD SEVERE WIND/HAIL
REMAINDER OF THE AFTERNOON. SEVERE WATCH NOT ANTICIPATED.

VIS IMAGERY/VOLUMETRIC RADAR DATA DEPICTS TSTM CLUSTERS EVOLVING
E/SE INVOF OF HIGHER TERRAIN IN LEE OF APPALACHIANS...WITH
ADDITIONAL DEVELOPMENT ALONG THE PIEDMONT CORRIDOR. WITH DOWNSTREAM
AIRMASS HAVING ALREADY WARMED IN THE LOWER 80S...MODERATE
INSTABILITY EXISTS WITH SBCAPES IN EXCESS OF 1000-1500 J/KG. RUC
POINT SOUNDINGS/LOCAL VADS SUGGEST 0-6 KM BULK SHEAR RANGING FROM
AROUND 30 KTS ACROSS VA...DIMINISHING TO 20-25 KTS INTO NC/SC. IN
ADDITION TO ISOLD LARGE HAIL THREAT GIVEN INSTABILITY...STEEP LOW
LEVEL LAPSE RATES/WELL MIXED BOUNDARY LAYER WILL CONTRIBUTE TO
STRONG WIND GUST POTENTIAL. EXPECTED LIMITED ORGANIZATION/MARGINAL
NATURE OF THREAT WILL LIKELY PRECLUDE SEVERE WATCH ISSUANCE.

..GUYER.. 05/19/2005

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

ATTN...WFO...AKQ...RAH...ILM...RNK...CAE...GSP...FFC...

37647986 37257814 34847917 33348133 33288284 34488323
35058249 36168085

Nearby

Mesoscale Discussions in North Carolina, 2005 Mesoscale Discussions in South Carolina, 2005 Mesoscale Discussions in Virginia, 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.