Alert archive / Georgia / Mesoscale Discussions in 2004
Mesoscale Discussion 2177
The Storm Prediction Center issued this mesoscale discussion at Sep 6, 2004, 3:55 PM EDT for 16 counties in Florida; 49 counties in Georgia; 10 counties in South Carolina. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Sep 6, 2004, 3:55 PM EDT (19:55 UTC)
- Expired
- Sep 6, 2004, 6:00 PM EDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 75 counties
Alachua County, FL, Baker County, FL, Bradford County, FL, Clay County, FL, Columbia County, FL, Duval County, FL, Flagler County, FL, Hamilton County, FL, Marion County, FL, Nassau County, FL, Putnam County, FL, Saint Johns County, FL, Seminole County, FL, Suwannee County, FL, Union County, FL, Volusia County, FL, Appling County, GA, Atkinson County, GA, Bacon County, GA, Ben Hill County, GA, Berrien County, GA, Bleckley County, GA, Brantley County, GA, Bryan County, GA, Bulloch County, GA, Burke County, GA, Camden County, GA, Candler County, GA, Charlton County, GA, Chatham County, GA, Clinch County, GA, Coffee County, GA, Cook County, GA, Dodge County, GA, Echols County, GA, Effingham County, GA, Emanuel County, GA, Evans County, GA, Glascock County, GA, Glynn County, GA, Irwin County, GA, Jeff Davis County, GA, Jefferson County, GA, Jenkins County, GA, Johnson County, GA, Lanier County, GA, Laurens County, GA, Liberty County, GA, Long County, GA, Lowndes County, GA, McIntosh County, GA, Montgomery County, GA, Pierce County, GA, Pulaski County, GA, Screven County, GA, Tattnall County, GA, Telfair County, GA, Tift County, GA, Toombs County, GA, Treutlen County, GA, Ware County, GA, Washington County, GA, Wayne County, GA, Wheeler County, GA, Wilcox County, GA, Allendale County, SC, Bamberg County, SC, Barnwell County, SC, Beaufort County, SC, Berkeley County, SC, Charleston County, SC, Colleton County, SC, Dorchester County, SC, Hampton County, SC, Jasper County, SC
The radar
The Jacksonville radar (KJAX), 39 km from the middle of the area, began a volume at 19:55 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 watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Jacksonville, FL (KJAX), launched 12:00Z, 7.9 hours before the alert went out and 37 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.
- Mixed-layer CAPE
- 830 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 653 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 235 m²/s²
- 0-3 km storm-relative helicity
- 235 m²/s²
- Significant tornado parameter
- 1.1
- Supercell composite
- 4.8
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 5, 8:35 PM EDT | Tornado Watch | SPC | Alachua, Baker, Bradford, Clay, Columbia, Dixie and 21 more | 9 hr |
| Sep 6, 12:12 AM EDT | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Clay, Columbia, Dixie and 21 more | 2 hr |
| Sep 6, 4:06 AM EDT | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Clay, Columbia, Dixie and 21 more | 84 min |
| Sep 6, 4:50 AM EDT | Tornado Watch | SPC | Alachua, Baker, Bradford, Clay, Columbia, Dixie and 11 more | 9 hr |
| Sep 6, 7:48 AM EDT | Mesoscale Discussion | SPC | Brevard, Charlotte, DeSoto, Hardee, Highlands, Lake and 8 more | 87 min |
| Sep 6, 7:55 AM EDT | Tornado Watch | SPC | Brevard, Charlotte, Citrus, DeSoto, Glades, Hardee and 21 more | 6 hr |
| Sep 6, 12:28 PM EDT | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Brevard, Charlotte, Citrus and 36 more | 92 min |
| Sep 6, 1:20 PM EDT | Tornado Watch | SPC | Alachua, Baker, Bradford, Brevard, Citrus, Clay and 38 more | 7 hr |
| Sep 6, 7:12 PM EDT | Mesoscale Discussion | SPC | Baker, Columbia, Duval, Nassau, Union | 2 hr |
| Sep 6, 7:45 PM EDT | Tornado Watch | SPC | Bradford, Clay, Duval, Flagler, Nassau, Putnam and 1 more | 9 hr |
| Sep 6, 1:21 AM EDT | Mesoscale Discussion | SPC | Richmond | 84 min |
| Sep 6, 1:00 PM EDT | Tornado Watch | SPC | Appling, Atkinson, Bacon, Ben Hill, Berrien, Bleckley and 49 more | 7 hr |
Nearby
Mesoscale Discussions in Georgia, 2004Mesoscale Discussions in Florida, 2004Mesoscale Discussions in South Carolina, 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; radar from the NEXRAD Level II archive.