Alert archive / North Carolina / Mesoscale Discussions in 2006

Mesoscale Discussion 1321

June 23, 20064 states

The Storm Prediction Center issued this mesoscale discussion at Jun 23, 2006, 1:09 PM EDT for 4 states. It was in force for 96 min.

The area

The outline as issued.

The facts

Issued: Jun 23, 2006, 1:09 PM EDT (17:09 UTC)
Expired: Jun 23, 2006, 2:45 PM EDT
In force: 96 min
Issued by: the Storm Prediction Center

All 51 counties

Habersham County, GA, Rabun County, GA, Stephens County, GA, White County, GA, Alexander County, NC, Alleghany County, NC, Ashe County, NC, Avery County, NC, Buncombe County, NC, Burke County, NC, Cabarrus County, NC, Caldwell County, NC, Catawba County, NC, Cleveland County, NC, Davidson County, NC, Davie County, NC, Forsyth County, NC, Gaston County, NC, Haywood County, NC, Henderson County, NC, Iredell County, NC, Jackson County, NC, Lincoln County, NC, Macon County, NC, Madison County, NC, McDowell County, NC, Mecklenburg County, NC, Mitchell County, NC, Polk County, NC, Rowan County, NC, Rutherford County, NC, Stanly County, NC, Surry County, NC, Swain County, NC, Transylvania County, NC, Union County, NC, Watauga County, NC, Wilkes County, NC, Yadkin County, NC, Yancey County, NC, Anderson County, SC, Cherokee County, SC, Chester County, SC, Greenville County, SC, Laurens County, SC, Oconee County, SC, Pickens County, SC, Spartanburg County, SC, Union County, SC, York County, SC, Unicoi County, TN

The radar

The Greer radar (KGSP), 86 km from the middle of the area, began a volume at 17:11 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, 5.2 hours before the alert went out and 163 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: 1011 J/kg
Mixed-layer CIN: -143 J/kg
Mixed-layer LCL: 1322 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 37 m²/s²
0-3 km storm-relative helicity: 24 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 231709
SWOMCD
SPC MCD 231709 
NCZ000-SCZ000-VAZ000-TNZ000-GAZ000-231845-

MESOSCALE DISCUSSION 1321
NWS STORM PREDICTION CENTER NORMAN OK
1209 PM CDT FRI JUN 23 2006

AREAS AFFECTED...WRN NC...NW SC...FAR NE GA

CONCERNING...SEVERE THUNDERSTORM POTENTIAL 

VALID 231709Z - 231845Z

AS THUNDERSTORMS CONTINUE TO INTENSIFY OVER THE SRN APPALACHIAN
MTNS...A SEVERE WEATHER THREAT SHOULD DEVELOP. DAMAGING WIND GUSTS
AND HAIL WILL BE THE PRIMARY THREATS WITH THE ACTIVITY.

LATEST ANALYSIS SHOWS A QUASI-STATIONARY FRONT EXTENDING WSWWD FROM
WV INTO CNTRL KY AND WRN TN. SOUTH OF THE BOUNDARY...A STRONGLY
UNSTABLE AIRMASS IS IN PLACE WITH MLCAPE VALUES ALREADY IN THE 2000
TO 2500 J/KG RANGE. THIS WILL FUEL THE STORMS DEVELOPING IN THE
HIGHER TERRAIN OF THE SRN APPALACHIANS THROUGH THE AFTERNOON.
ALTHOUGH THE SHEAR IS RELATIVELY WEAK...FORECAST SOUNDINGS SHOW VERY
STEEP LOW-LEVEL LAPSE RATES EXCEEDING 8.0 C/KM IN PLACES. THIS MAY
ENHANCE THE POTENTIAL FOR ISOLATED DAMAGING WINDS. HAIL WILL ALSO BE
POSSIBLE DUE TO THE STRONG INSTABILITY IN PLACE ACROSS THE REGION.

..BROYLES.. 06/23/2006

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

ATTN...WFO...RAH...RNK...CAE...GSP...MRX...FFC...

35417995 34668097 34268239 34658381 35718342 36578139
36348003

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 23, 11:52 AM EDT	Mesoscale Discussion	SPC	Catoosa, Chattooga, Dade, Floyd, Walker	83 min

Nearby

Mesoscale Discussions in North Carolina, 2006 Mesoscale Discussions in South Carolina, 2006 Mesoscale Discussions in Georgia, 2006 Every mesoscale discussion in 2006

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.