Alert archive / Georgia / Mesoscale Discussions in 2004

Mesoscale Discussion 46

January 26, 200419 counties in Georgia; 11 counties in North Carolina; 16 counties in South Carolina

The Storm Prediction Center issued this mesoscale discussion at Jan 26, 2004, 5:57 PM EST for 19 counties in Georgia; 11 counties in North Carolina; 16 counties in South Carolina. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued: Jan 26, 2004, 5:57 PM EST (22:57 UTC)
Expired: Jan 26, 2004, 10:30 PM EST
In force: 5 hr
Issued by: the Storm Prediction Center

All 46 counties

Banks County, GA, Barrow County, GA, Clarke County, GA, Elbert County, GA, Franklin County, GA, Greene County, GA, Hall County, GA, Hart County, GA, Jackson County, GA, Lincoln County, GA, Madison County, GA, Morgan County, GA, Newton County, GA, Oconee County, GA, Oglethorpe County, GA, Stephens County, GA, Taliaferro County, GA, Walton County, GA, Wilkes County, GA, Buncombe County, NC, Burke County, NC, Catawba County, NC, Cleveland County, NC, Gaston County, NC, Henderson County, NC, Lincoln County, NC, McDowell County, NC, Polk County, NC, Rutherford County, NC, Transylvania County, NC, Abbeville County, SC, Anderson County, SC, Cherokee County, SC, Chester County, SC, Fairfield County, SC, Greenville County, SC, Greenwood County, SC, Laurens County, SC, McCormick County, SC, Newberry County, SC, Oconee County, SC, Pickens County, SC, Saluda County, SC, Spartanburg County, SC, Union County, SC, York County, SC

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 11.0 hours before the alert went out and 215 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: 0 J/kg
Mixed-layer LCL: 259 m above ground
0-6 km bulk shear: 74 kt
0-1 km storm-relative helicity: 56 m²/s²
0-3 km storm-relative helicity: 111 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.

431 
ACUS11 KWNS 262257
SWOMCD
SPC MCD 262257 
SCZ000-NCZ000-GAZ000-270330-

MESOSCALE DISCUSSION 0046
NWS STORM PREDICTION CENTER NORMAN OK
0457 PM CST MON JAN 26 2004

AREAS AFFECTED...N-CENTRAL/NERN GA...UPSTATE SC...AND SWRN NC

CONCERNING...FREEZING RAIN 

VALID 262257Z - 270330Z

NEXT BATCH OF FREEZING PRECIPITATION TO MOVE FROM SW TO NE ACROSS
NRN GA/WRN SC/SWRN NC BETWEEN 26/23Z-27/06Z. LIGHT GLAZE LIKELY WITH
GENERAL 0.05-0.10/3 HR FREEZING RAIN RATES ACROSS AREA.

AT 2230Z...LARGE UPPER TROUGH CONTINUES SLOW EWD MIGRATION ACROSS
CENTRAL PLAINS WITH BROAD SWLY FLOW ACROSS THE SERN STATES. RUC
DEPICTS AN EMBEDDED 500MB VORT MAX AND ASSOCIATED JET STREAK NEAR
SRN MS/SRN AL...WHICH WILL TRACK RAPIDLY NEWD INTO THE SRN
APPALACHIAN MTNS BY 27/06Z. MOSAIC RADAR IMAGERY DEPICTS WIDELY
SCATTERED SHOWERS ACROSS CENTRAL/ERN AL...MOVING NEWD AT
40-50KT...THAT APPEARS TO BE ASSOCIATED WITH ABOVE MENTIONED
FEATURES.

AT THE SURFACE...STRONG QUASI-STATIONARY FRONT ASSOCIATED WITH COLD
AIR DAMMING REGIME EXTENDS FROM THE GA/FL BORDER NWWD INTO E-CENTRAL
AL. STRONG FLOW ORTHOGONAL TO BOUNDARY IN 850-500MB LAYER SHOULD
RESULT IN ENHANCED ISENTROPIC LIFT ACROSS MUCH OF NRN/NERN GA DURING
23-03Z PERIOD...AS VORT LIFTS NE INTO BAROCLINIC ZONE. PRECIP SHOULD
THEN CONTINUE NEWD INTO UPSTATE SC AND SWRN NC BETWEEN 02-06Z.
VALLEY TEMPERATURES IN THE 28-32F RANGE SHOULD SUPPORT
ICING...PARTICULARLY ON ELEVATED SURFACES. LIGHT NELY SURFACE
WINDS/WEAK CAA SHOULD COUNTERACT EFFECTS OF WARMING WITH WARM
PRECIPITATION FALLING INTO SHALLOW BOUNDARY LAYER AND DIABATIC
WARMING ASSOCIATED WITH FREEZING. DYNAMIC FORCING SHOULD SUPPORT
LIGHT FREEZING RAIN OF 0.05-0.10/3 HR ACROSS DISCUSSION AREA
MID-EVENING THROUGH THE EARLY MORNING.

..BANACOS.. 01/26/2004

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

ATTN...WFO...CAE...GSP...FFC...

33748219 33588261 33378325 33318364 33438394 34028394
34438384 34618328 35418283 35658248 35818162 35898119
35658081 34298090

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jan 26, 3:10 AM EST	Mesoscale Discussion	SPC	Baker, Calhoun, Clay, Decatur, Dougherty, Early and 4 more	3 hr
Jan 26, 4:15 AM EST	Mesoscale Discussion	SPC	Clarke, Columbia, Elbert, Glascock, Greene, Hancock and 14 more	6 hr
Jan 26, 5:15 AM EST	Tornado Watch	SPC	Baker, Calhoun, Clay, Crisp, Decatur, Dougherty and 12 more	6 hr
Jan 26, 8:00 AM EST	Mesoscale Discussion	SPC	Baker, Calhoun, Clay, Crisp, Decatur, Dougherty and 12 more	2 hr
Jan 26, 10:30 AM EST	Tornado Watch	SPC	Atkinson, Bacon, Baker, Berrien, Brooks, Calhoun and 19 more	6 hr
Jan 26, 3:00 PM EST	Mesoscale Discussion	SPC	Atkinson, Brantley, Charlton, Clinch, Echols, Lanier and 3 more	60 min
Jan 26, 8:38 AM EST	Mesoscale Discussion	SPC	Anson, Beaufort, Bertie, Bladen, Chatham, Columbus and 24 more	6 hr
Jan 26, 11:51 AM EST	Mesoscale Discussion	SPC	Bladen, Columbus, Robeson, Scotland	4 hr

Nearby

Mesoscale Discussions in Georgia, 2004 Mesoscale Discussions in South Carolina, 2004 Mesoscale Discussions in North Carolina, 2004 Every mesoscale discussion in 2004

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.