Alert archive / Florida / Tornado Watches in 2005
Tornado Watch 121
The Storm Prediction Center issued this tornado watch at Apr 1, 2005, 11:30 AM EST for 23 counties in Florida; 17 counties in Georgia. It was in force for 8 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 1, 2005, 11:30 AM EST (16:30 UTC)
- Expired
- Apr 1, 2005, 7:00 PM EST
- In force
- 8 hr
- Issued by
- the Storm Prediction Center
All 40 counties
Alachua County, FL, Baker 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, Hamilton County, FL, Jefferson County, FL, Lafayette County, FL, Leon County, FL, Liberty County, FL, Madison County, FL, Nassau County, FL, Putnam County, FL, Suwannee County, FL, Taylor County, FL, Union County, FL, Wakulla County, FL, Atkinson County, GA, Brantley County, GA, Brooks County, GA, Camden County, GA, Charlton County, GA, Clinch County, GA, Cook County, GA, Decatur County, GA, Echols County, GA, Glynn County, GA, Grady County, GA, Lanier County, GA, Lowndes County, GA, Pierce County, GA, Seminole County, GA, Thomas County, GA, Ware County, GA
The radar
The Tallahassee radar (KTLH), 61 km from the middle of the area, began a volume at 16:31 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
2 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 1, 12:31 PM EST | Severe Thunderstorm Warning | TAE | Leon | 44 min |
| Apr 1, 4:08 PM EST | Severe Thunderstorm Warning | JAX | Charlton | 114 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
Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 4.5 hours before the alert went out and 58 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
- 1455 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- 87 m²/s²
- 0-3 km storm-relative helicity
- 333 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
000
WWUS20 KWNS 011629
SEL1
SPC WW 011629
FLZ000-GAZ000-CWZ000-020000-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 121
NWS STORM PREDICTION CENTER NORMAN OK
1130 AM EST FRI APR 1 2005
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
NORTHERN FLORIDA
SOUTHERN GEORGIA
COASTAL WATERS
EFFECTIVE THIS FRIDAY MORNING AND EVENING FROM 1130 AM UNTIL 700
PM EST.
TORNADOES...HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.
THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 70 STATUTE MILES
NORTH AND SOUTH OF A LINE FROM 15 MILES NORTHWEST OF APALACHICOLA
FLORIDA TO 15 MILES EAST NORTHEAST OF JACKSONVILLE FLORIDA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU1).
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...ORGANIZED SQUALL LINE WITH POTENTIAL FOR DAMAGING WIND
AND ISOLATED TORNADOES EXPECTED TO PERSIST AS IT MOVES EAST INTO
INCREASINGLY UNSTABLE AIR DOWNSTREAM ACROSS NRN FL INTO SRN GA.
SHEAR PROFILES WILL SUPPORT EMBEDDED ORGANIZED STRUCTURES WITHIN THE
LINE...AS WELL AS ANY STORMS DEVELOPING AHEAD OF THE
LINE...INCLUDING SUPERCELLS AND BOW ECHOES.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 26035.
...DIAL/EVANS
305,0851 313,0812 293,0812 285,0851SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 1, 2:29 AM EST | Mesoscale Discussion | SPC | Escambia, Holmes, Okaloosa, Santa Rosa, Walton, Washington | 2 hr |
| Apr 1, 3:05 AM EST | Tornado Watch | SPC | Escambia, Okaloosa, Santa Rosa, Walton | 5 hr |
| Apr 1, 8:44 AM EST | Mesoscale Discussion | SPC | Alachua, Baker, Bay, Bradford, Calhoun, Columbia and 16 more | 2 hr |
| Apr 1, 2:16 PM EST | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Clay, Columbia, Dixie and 10 more | 119 min |
| Apr 1, 6:23 PM EST | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Calhoun, Clay, Columbia and 17 more | 67 min |
| Apr 1, 5:55 PM EST | Mesoscale Discussion | SPC | Bartow, Catoosa, Chattooga, Dade, Fannin, Floyd and 7 more | 65 min |
Nearby
Tornado Watches in Florida, 2005Tornado Watches in Georgia, 2005Every tornado watch in 2005
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.