Alert archive / South Carolina / Mesoscale Discussions in 2005

Mesoscale Discussion 1749

July 14, 200515 counties in Georgia; 31 counties in South Carolina

The Storm Prediction Center issued this mesoscale discussion at Jul 14, 2005, 1:29 PM EDT for 15 counties in Georgia; 31 counties in South Carolina. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jul 14, 2005, 1:29 PM EDT (17:29 UTC)
Expired: Jul 14, 2005, 3:30 PM EDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 46 counties

Bulloch County, GA, Burke County, GA, Candler County, GA, Columbia County, GA, Effingham County, GA, Emanuel County, GA, Glascock County, GA, Jefferson County, GA, Jenkins County, GA, Johnson County, GA, Lincoln County, GA, McDuffie County, GA, Richmond County, GA, Screven County, GA, Treutlen County, GA, Aiken County, SC, Allendale County, SC, Bamberg County, SC, Barnwell County, SC, Berkeley County, SC, Calhoun County, SC, Chester County, SC, Clarendon County, SC, Colleton County, SC, Darlington County, SC, Dorchester County, SC, Edgefield County, SC, Fairfield County, SC, Florence County, SC, Greenwood County, SC, Hampton County, SC, Jasper County, SC, Kershaw County, SC, Lancaster County, SC, Laurens County, SC, Lee County, SC, Lexington County, SC, Marion County, SC, McCormick County, SC, Newberry County, SC, Orangeburg County, SC, Richland County, SC, Saluda County, SC, Sumter County, SC, Union County, SC, Williamsburg County, SC

The radar

The Columbia radar (KCAE), 44 km from the middle of the area, began a volume at 17:32 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

Charleston AFB, SC (KCHS), launched 12:00Z, 5.5 hours before the alert went out and 130 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: 2893 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 572 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 46 m²/s²
0-3 km storm-relative helicity: 64 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 141729
SWOMCD
SPC MCD 141729 
SCZ000-GAZ000-141930-

MESOSCALE DISCUSSION 1749
NWS STORM PREDICTION CENTER NORMAN OK
1229 PM CDT THU JUL 14 2005

AREAS AFFECTED...ECENTRAL GA...SC

CONCERNING...SEVERE THUNDERSTORM POTENTIAL 

VALID 141729Z - 141930Z

CONVECTION DEVELOPING OVER ECENTRAL GA SHOULD BECOME SOMEWHAT
ORGANIZED AS IT MOVES INTO SC THROUGH THE AFTERNOON...WHILE LIKELY
POSING AN ISOLATED SVR WIND THREAT. ADDITIONAL ISOLATED STORMS
DEVELOPING OVER SC MAY ALSO POSE A THREAT FOR ISOLATED DMGG WINDS.

WV IMAGERY SHOWS SUBTLE MCV OVER CENTRAL GA. RECENT MONTGOMERY VWP
INDICATED AROUND 20-25 KTS OF UNIDIRECTIONAL WLY WINDS IN THE 2-6 KM
LAYER ASSOCIATED WITH THIS FEATURE. THE LEADING EDGE OF MID LEVEL
CLOUD COVER ASSOCIATED WITH THE MCV HAS AIDED IN THE DEVELOPMENT OF
A DIFFERENTIAL HEATING BOUNDARY ACROSS ECENTRAL GA. THIS BOUNDARY
WILL BE A FOCUS FOR TSTM DEVELOPMENT OVER THE NEXT FEW HOURS.
GRADUALLY INCREASING WAA AHEAD OF THE MCV SHOULD ALSO SUPPORT
ISOLATED STG-SVR TSTMS OVER SC ALONG SEA BREEZE FRONT AND OTHER
WEAKER SFC TROUGHS. MODERATE INSTABILITY WITH MLCAPES AROUND 2000
J/KG...COMBINED WITH AFOREMENTIONED WIND FIELDS SPREADING EWD ACROSS
SC THROUGH THE AFTERNOON...SUGGEST THAT ISOLATED DMGG WINDS WILL BE
POSSIBLE.

..CROSBIE.. 07/14/2005

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

ATTN...WFO...ILM...CHS...CAE...GSP...FFC...

34567966 34688060 34848174 33958260 33048273 32598273
32248244 32218118 32708033 33707904

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 14, 4:50 PM EDT	Mesoscale Discussion	SPC	Carroll, Haralson, Heard, Paulding, Polk	3 hr

Nearby

Mesoscale Discussions in South Carolina, 2005 Mesoscale Discussions in Georgia, 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.