Alert archive / Georgia / Tornado Watches in 2004
Tornado Watch 841
The Storm Prediction Center issued this tornado watch at Sep 26, 2004, 4:25 PM EDT for 14 counties in Florida; 23 counties in Georgia. It was in force for 9 hr.
The area
The outline as issued.
The facts
- Issued
- Sep 26, 2004, 4:25 PM EDT (20:25 UTC)
- Expired
- Sep 27, 2004, 1:00 AM EDT
- In force
- 9 hr
- Issued by
- the Storm Prediction Center
All 37 counties
Alachua County, FL, Baker County, FL, Bradford County, FL, Clay County, FL, Columbia County, FL, Duval County, FL, Flagler County, FL, Gilchrist County, FL, Hamilton County, FL, Nassau County, FL, Putnam County, FL, Saint Johns County, FL, Suwannee County, FL, Union County, FL, Appling County, GA, Atkinson County, GA, Bacon County, GA, Ben Hill County, GA, Brantley County, GA, Bryan County, GA, Camden County, GA, Charlton County, GA, Chatham County, GA, Clinch County, GA, Coffee County, GA, Echols County, GA, Glynn County, GA, Jeff Davis County, GA, Lanier County, GA, Liberty County, GA, Long County, GA, McIntosh County, GA, Pierce County, GA, Tattnall County, GA, Telfair County, GA, Ware County, GA, Wayne County, GA
The radar
The Jacksonville radar (KJAX), 57 km from the middle of the area, began a volume at 20:27 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
17 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 26, 4:46 PM EDT | Tornado Warning | JAX | Nassau | 14 min |
| Sep 26, 4:59 PM EDT | Tornado Warning | JAX | Nassau | 16 min |
| Sep 26, 5:07 PM EDT | Tornado Warning | JAX | Duval, Saint Johns | 38 min |
| Sep 26, 6:59 PM EDT | Tornado Warning | JAX | Saint Johns | 31 min |
| Sep 26, 7:12 PM EDT | Tornado Warning | JAX | Duval | 18 min |
| Sep 26, 7:22 PM EDT | Tornado Warning | JAX | Duval, Saint Johns | 23 min |
| Sep 26, 7:54 PM EDT | Tornado Warning | JAX | Duval, Nassau, Saint Johns | 51 min |
| Sep 26, 8:42 PM EDT | Tornado Warning | JAX | Nassau | 33 min |
| Sep 26, 9:42 PM EDT | Tornado Warning | JAX | Nassau | 33 min |
| Sep 26, 9:55 PM EDT | Tornado Warning | JAX | Charlton | 35 min |
| Sep 26, 10:13 PM EDT | Tornado Warning | JAX | Nassau | 32 min |
| Sep 26, 10:57 PM EDT | Tornado Warning | JAX | Clinch | 33 min |
| Sep 26, 11:08 PM EDT | Tornado Warning | CHS | Chatham | 37 min |
| Sep 26, 11:21 PM EDT | Tornado Warning | JAX | Ware | 24 min |
| Sep 26, 11:48 PM EDT | Tornado Warning | JAX | Atkinson, Clinch | 27 min |
| Sep 27, 12:02 AM EDT | Tornado Warning | JAX | Ware | 28 min |
| Sep 27, 12:48 AM EDT | Tornado Warning | JAX | Clinch | 27 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Jacksonville, FL (KJAX), launched 12:00Z, 8.4 hours before the alert went out and 56 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
- 1022 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 577 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 245 m²/s²
- 0-3 km storm-relative helicity
- 287 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 6.4
The text
As transmitted, in the capitals the NWS used until 2016.
000
WWUS20 KWNS 262028
SEL1
SPC WW 262025
FLZ000-GAZ000-CWZ000-270500-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 841
NWS STORM PREDICTION CENTER NORMAN OK
425 PM EDT SUN SEP 26 2004
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
NORTHERN FLORIDA
SOUTH-CENTRAL AND SOUTHEASTERN GEORGIA
COASTAL WATERS
EFFECTIVE THIS SUNDAY AFTERNOON AND MONDAY MORNING FROM 425 PM
UNTIL 100 AM EDT.
TORNADOES...THUNDERSTORM WIND GUSTS TO 70 MPH...AND DANGEROUS
LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE TORNADO WATCH AREA IS ALONG AND 70 STATUTE MILES EAST AND WEST
OF A LINE FROM 25 MILES SOUTHEAST OF GAINESVILLE FLORIDA TO 60
MILES NORTH NORTHEAST OF WAYCROSS GEORGIA.
REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA.
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.
OTHER WATCH INFORMATION...THIS TORNADO WATCH REPLACES TORNADO
WATCH NUMBER 840. WATCH NUMBER 840 WILL NOT BE IN EFFECT AFTER 425
PM EDT.
DISCUSSION...FAVORABLE BOUNDARY LAYER SHEAR ENVELOPE AND OUTER BAND
CONVECTION ASSOCIATED WITH NERN QUADRANT OF TC JEANNE IS EXPECTED TO
SHIFT NWD ACROSS WW AREA THROUGH REMAINDER EVENING...LIKEWISE
SHIFTING POTENTIAL FOR MINI-SUPERCELLS AND ASSOCIATED TORNADOES.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH EXTREME
TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI
WITH MAXIMUM TOPS TO 450. MEAN STORM MOTION VECTOR 14035.
...EDWARDS/HART
292,0830 320,0831 320,0804 292,0804SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 25, 8:48 PM EDT | Mesoscale Discussion | SPC | Brevard, Flagler, Glades, Hendry, Highlands, Indian River and 10 more | 117 min |
| Sep 25, 11:10 PM EDT | Tornado Watch | SPC | Brevard, Flagler, Glades, Hardee, Hendry, Highlands and 14 more | 7 hr |
| Sep 26, 2:37 AM EDT | Mesoscale Discussion | SPC | Brevard, Flagler, Highlands, Indian River, Lake, Marion and 6 more | 113 min |
| Sep 26, 4:50 AM EDT | Tornado Watch | SPC | Alachua, Baker, Bradford, Brevard, Citrus, Clay and 22 more | 12 hr |
| Sep 26, 8:21 AM EDT | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Brevard, Citrus, Clay and 18 more | 114 min |
| Sep 26, 11:13 AM EDT | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Brevard, Citrus, Clay and 22 more | 2 hr |
| Sep 26, 3:11 PM EDT | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Brevard, Citrus, Clay and 22 more | 2 hr |
| Sep 26, 7:16 PM EDT | Mesoscale Discussion | SPC | Baker, Duval, Nassau | 119 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.