Alert archive / Florida / Tornado Watches in 2004
Tornado Watch 838
The Storm Prediction Center issued this tornado watch at Sep 25, 2004, 4:25 PM EDT for 18 counties in Florida. It was in force for 8 hr.
The area
The outline as issued.
The facts
- Issued
- Sep 25, 2004, 4:25 PM EDT (20:25 UTC)
- Expired
- Sep 26, 2004, 12:00 AM EDT
- In force
- 8 hr
- Issued by
- the Storm Prediction Center
Counties Brevard County, FL, Flagler County, FL, Glades County, FL, Hendry County, FL, Highlands County, FL, Indian River County, FL, Lake County, FL, Marion County, FL, Martin County, FL, Okeechobee County, FL, Orange County, FL, Osceola County, FL, Palm Beach County, FL, Polk County, FL, Putnam County, FL, Saint Lucie County, FL, Seminole County, FL, Volusia County, FL
The radar
The Melbourne radar (KMLB), 40 km from the middle of the area, began a volume at 20:25 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
8 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 25, 5:51 PM EDT | Tornado Warning | MLB | Indian River, Okeechobee | 29 min |
| Sep 25, 6:30 PM EDT | Tornado Warning | MLB | Martin, Okeechobee, Saint Lucie | 30 min |
| Sep 25, 6:46 PM EDT | Tornado Warning | MLB | Brevard, Orange | 29 min |
| Sep 25, 8:53 PM EDT | Flash Flood Warning | MLB | Indian River, Martin, Saint Lucie | 4 hr |
| Sep 25, 9:06 PM EDT | Tornado Warning | MLB | Martin, Saint Lucie | 54 min |
| Sep 25, 9:47 PM EDT | Tornado Warning | MLB | Indian River | 58 min |
| Sep 25, 10:30 PM EDT | Flash Flood Warning | MFL | Palm Beach | 4 hr |
| Sep 25, 11:58 PM EDT | Tornado Warning | MLB | Brevard | 62 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
Tampa Bay, FL (KTBW), launched 12:00Z, 8.4 hours before the alert went out and 169 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 623 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 111 m²/s²
- 0-3 km storm-relative helicity
- 105 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WWUS20 KWNS 252023
SEL8
SPC WW 252025
FLZ000-CWZ000-260400-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 838
NWS STORM PREDICTION CENTER NORMAN OK
425 PM EDT SAT SEP 25 2004
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
EASTERN FLORIDA PENINSULA
COASTAL WATERS
EFFECTIVE THIS SATURDAY AFTERNOON FROM 425 PM UNTIL MIDNIGHT EDT.
TORNADOES...HAIL TO 0.5 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE TORNADO WATCH AREA IS ALONG AND 50 STATUTE MILES EAST AND WEST
OF A LINE FROM 50 MILES NORTH NORTHWEST OF DAYTONA BEACH FLORIDA
TO 40 MILES SOUTHWEST OF WEST PALM BEACH FLORIDA.
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.
DISCUSSION...HURRICANE JEANNE IS EXPECTED TO MAKE LANDFALL LATER
THIS EVENING NEAR VRB. MLB VAD SHOWS STRONG LOW LEVEL VERTICAL
SHEAR IS NOW IN PLACE AHEAD OF SYSTEM. CONVECTIVE BANDS IN WEST AND
NORTHWEST QUADRANTS WILL POSE A RISK OF TROPICAL TORNADOES.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550.
MEAN STORM MOTION VECTOR 07045.
...HART
295,0803 261,0794 261,0811 295,0821SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 25, 2:43 PM EDT | Mesoscale Discussion | SPC | Brevard, Flagler, Indian River, Lake, Orange, Osceola and 3 more | 3 hr |
Nearby
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.