Alert archive / Georgia / Mesoscale Discussions in 2004

Mesoscale Discussion 2228

September 16, 20044 states

The Storm Prediction Center issued this mesoscale discussion at Sep 16, 2004, 11:42 PM EDT for 4 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Sep 16, 2004, 11:42 PM EDT (03:42 UTC)
Expired
Sep 17, 2004, 1:45 AM EDT
In force
2 hr
Issued by
the Storm Prediction Center
All 67 counties

Baker County, FL, Union County, FL, Baldwin County, GA, Brantley County, GA, Burke County, GA, Charlton County, GA, Clarke County, GA, Clinch County, GA, Columbia County, GA, Dodge County, GA, Elbert County, GA, Franklin County, GA, Glascock County, GA, Greene County, GA, Hancock County, GA, Hart County, GA, Jefferson County, GA, Johnson County, GA, Lanier County, GA, Laurens County, GA, Lincoln County, GA, Long County, GA, Madison County, GA, McDuffie County, GA, Oglethorpe County, GA, Pierce County, GA, Putnam County, GA, Richmond County, GA, Stephens County, GA, Taliaferro County, GA, Telfair County, GA, Ware County, GA, Warren County, GA, Washington County, GA, Wayne County, GA, Wilkes County, GA, Wilkinson County, GA, Gaston County, NC, Mecklenburg County, NC, Abbeville County, SC, Aiken County, SC, Allendale County, SC, Anderson County, SC, Bamberg County, SC, Barnwell County, SC, Calhoun County, SC, Cherokee County, SC, Chester County, SC, Edgefield County, SC, Fairfield County, SC, Greenville County, SC, Greenwood County, SC, Hampton County, SC, Kershaw County, SC, Lancaster County, SC, Laurens County, SC, Lexington County, SC, McCormick County, SC, Newberry County, SC, Oconee County, SC, Orangeburg County, SC, Pickens County, SC, Richland County, SC, Saluda County, SC, Spartanburg County, SC, Union County, SC, York County, SC

The nearest sounding before it

Jacksonville, FL (KJAX), launched 00:00Z, 3.7 hours before the alert went out and 224 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-pSkew-T log-p diagram, Jacksonville, FL at 00:00Z on 2004-09-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2714 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Jacksonville, FL at 00:00Z on 2004-09-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 116 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
2714 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
741 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
116 m²/s²
0-3 km storm-relative helicity
147 m²/s²
Significant tornado parameter
1.1
Supercell composite
6.9

Open this sounding in Storm Lab

The text

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

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 16, 8:45 PM EDTTornado WatchSPCBaldwin, Banks, Burke, Clarke, Columbia, Elbert and 24 more6 hr
Sep 17, 1:51 AM EDTMesoscale DiscussionSPCAlexander, Burke, Caldwell, Catawba, Cleveland, Gaston and 6 more84 min
Sep 17, 9:26 AM EDTMesoscale DiscussionSPCAlamance, Anson, Bladen, Caswell, Chatham, Cumberland and 24 more2 hr
Sep 17, 10:10 AM EDTTornado WatchSPCAlamance, Anson, Bladen, Brunswick, Caswell, Chatham and 37 more7 hr
Sep 17, 11:03 AM EDTMesoscale DiscussionSPCAlamance, Bertie, Caswell, Chatham, Cumberland, Durham and 26 more87 min
Sep 17, 12:33 PM EDTMesoscale DiscussionSPCBeaufort, Bertie, Camden, Chowan, Craven, Gates and 8 more117 min
Sep 17, 1:15 PM EDTTornado WatchSPCBeaufort, Bertie, Camden, Carteret, Chowan, Craven and 18 more7 hr
Sep 17, 1:37 PM EDTMesoscale DiscussionSPCAlamance, Bladen, Brunswick, Caswell, Chatham, Columbus and 29 more113 min
Sep 17, 3:53 PM EDTMesoscale DiscussionSPCBeaufort, Bertie, Camden, Chowan, Craven, Edgecombe and 11 more2 hr
Sep 17, 4:01 PM EDTMesoscale DiscussionSPCBladen, Brunswick, Columbus, Cumberland, Duplin, Franklin and 6 more59 min
Sep 17, 4:35 PM EDTTornado WatchSPCBladen, Brunswick, Columbus, Duplin, Edgecombe, Franklin and 14 more3 hr
Sep 17, 6:19 PM EDTMesoscale DiscussionSPCBeaufort, Bertie, Camden, Chowan, Craven, Currituck and 13 more116 min
Sep 17, 6:50 PM EDTTornado WatchSPCBertie, Camden, Chowan, Currituck, Gates, Hertford and 3 more5 hr
Sep 17, 7:23 PM EDTMesoscale DiscussionSPCDuplin, Edgecombe, Greene, Halifax, Lenoir, Nash and 4 more37 min

Nearby

Mesoscale Discussions in Georgia, 2004Mesoscale Discussions in South Carolina, 2004Mesoscale Discussions in Florida, 2004Every 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.