Alert archive / Georgia / Tornado Watches in 2004
Tornado Watch 742
The Storm Prediction Center issued this tornado watch at Aug 12, 2004, 8:50 AM EDT for 29 counties in Florida; 44 counties in Georgia. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 12, 2004, 8:50 AM EDT (12:50 UTC)
- Expired
- Aug 12, 2004, 2:00 PM EDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 73 counties
Alachua County, FL, Baker County, FL, Bay County, FL, Bradford County, FL, Calhoun County, FL, Clay County, FL, Columbia County, FL, Dixie County, FL, Duval County, FL, Franklin County, FL, Gadsden County, FL, Gilchrist County, FL, Gulf County, FL, Hamilton County, FL, Jackson County, FL, Jefferson County, FL, Lafayette County, FL, Leon County, FL, Levy County, FL, Liberty County, FL, Madison County, FL, Marion County, FL, Nassau County, FL, Putnam County, FL, Saint Johns County, FL, Suwannee County, FL, Taylor County, FL, Union County, FL, Wakulla County, FL, Appling County, GA, Atkinson County, GA, Bacon County, GA, Baker County, GA, Ben Hill County, GA, Berrien County, GA, Brantley County, GA, Brooks County, GA, Calhoun County, GA, Camden County, GA, Charlton County, GA, Clay County, GA, Clinch County, GA, Coffee County, GA, Colquitt County, GA, Cook County, GA, Crisp County, GA, Decatur County, GA, Dougherty County, GA, Early County, GA, Echols County, GA, Glynn County, GA, Grady County, GA, Irwin County, GA, Jeff Davis County, GA, Lanier County, GA, Lee County, GA, Liberty County, GA, Long County, GA, Lowndes County, GA, McIntosh County, GA, Miller County, GA, Mitchell County, GA, Pierce County, GA, Randolph County, GA, Seminole County, GA, Telfair County, GA, Terrell County, GA, Thomas County, GA, Tift County, GA, Turner County, GA, Ware County, GA, Wayne County, GA, Worth County, GA
The radar
The Tallahassee radar (KTLH), 54 km from the middle of the area, began a volume at 12:51 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.
Warnings issued inside it
3 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 12, 11:12 AM EDT | Flash Flood Warning | TAE | Jefferson, Lafayette, Taylor | 4 hr |
| Aug 12, 12:43 PM EDT | Flash Flood Warning | TAE | Dixie | 32 min |
| Aug 12, 1:09 PM EDT | Flash Flood Warning | TAE | Dixie | 3 hr |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 0.8 hours before the alert went out and 52 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
- 1178 J/kg
- Mixed-layer CIN
- -20 J/kg
- Mixed-layer LCL
- 630 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 33 m²/s²
- 0-3 km storm-relative helicity
- 50 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.9
The text
As transmitted, in the capitals the NWS used until 2016.
000 WWUS20 KWNS 121251 SEL2 SPC WW 121250 ?Z000-FLZ000-GAZ000-CWZ000-121800- URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 742 NWS STORM PREDICTION CENTER NORMAN OK 850 AM EDT THU AUG 12 2004 THE NWS STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 12, 8:00 AM EDT | Mesoscale Discussion | SPC | Alachua, Baker, Bay, Bradford, Calhoun, Columbia and 18 more | 3 hr |
| Aug 12, 12:50 PM EDT | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Clay, Columbia, Dixie and 19 more | 55 min |
| Aug 12, 1:50 PM EDT | Tornado Watch | SPC | Alachua, Baker, Bradford, Brevard, Citrus, Clay and 30 more | 7 hr |
| Aug 12, 7:02 PM EDT | Mesoscale Discussion | SPC | Brevard, Clay, Duval, Flagler, Hardee, Indian River and 9 more | 88 min |
| Aug 12, 4:09 AM EDT | Mesoscale Discussion | SPC | Barrow, Bartow, Carroll, Cherokee, Clayton, Cobb and 14 more | 3 hr |
| Aug 12, 10:02 AM EDT | Mesoscale Discussion | SPC | Bleckley, Bulloch, Burke, Candler, Columbia, Effingham and 13 more | 88 min |
| Aug 12, 11:45 AM EDT | Tornado Watch | SPC | Bleckley, Bryan, Bulloch, Burke, Candler, Chatham and 25 more | 6 hr |
| Aug 12, 4:06 PM EDT | Mesoscale Discussion | SPC | Bryan, Bulloch, Candler, Chatham, Effingham, Evans and 6 more | 84 min |
Nearby
Tornado Watches in Georgia, 2004Tornado Watches in Florida, 2004Every tornado watch 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.