Alert archive / Florida / Tornado Watches in 2005

Tornado Watch 366

May 31, 200514 counties in Florida

The Storm Prediction Center issued this tornado watch at May 31, 2005, 10:40 PM EDT for 14 counties in Florida. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued: May 31, 2005, 10:40 PM EDT (02:40 UTC)
Expired: Jun 1, 2005, 6:00 AM EDT
In force: 7 hr
Issued by: the Storm Prediction Center

Counties Charlotte County, FL, DeSoto County, FL, Hardee County, FL, Hillsborough County, FL, Lake County, FL, Lee County, FL, Manatee County, FL, Marion County, FL, Orange County, FL, Polk County, FL, Sarasota County, FL, Seminole County, FL, Sumter County, FL, Volusia County, FL

The radar

The Tampa radar (KTBW), 31 km from the middle of the area, began a volume at 02:40 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
Jun 1, 1:42 AM EDT	Tornado Warning	TBW	Sarasota	48 min
Jun 1, 2:53 AM EDT	Tornado Warning	TBW	Hardee	52 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 00:00Z, 2.7 hours before the alert went out and 31 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1310 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 1140 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 90 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 2.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WWUS20 KWNS 010239
SEL6  
SPC WW 010239
FLZ000-CWZ000-011000-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 366
NWS STORM PREDICTION CENTER NORMAN OK
1040 PM EDT TUE MAY 31 2005

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF 

       CENTRAL FLORIDA PENINSULA
       COASTAL WATERS

EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 1040 PM
UNTIL 600 AM EDT.

TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 40 STATUTE MILES
EITHER SIDE OF A LINE FROM 30 MILES NORTHWEST OF DAYTONA BEACH
FLORIDA TO 30 MILES WEST OF FORT MEYERS FLORIDA.  FOR A COMPLETE
DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE
(WOUS64 KWNS WOU6).

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...CONTINUE...WW 362...WW 363...WW 364...WW
365...

DISCUSSION...LINE OF STRONG THUNDERSTORMS WILL MOVE ASHORE ACROSS
THE CENTRAL FL PENINSULA DURING THE NEXT FEW HOURS.  TBW VWP AND 00Z
SOUNDING APPEAR TO SUPPORT A RISK OF SUPERCELLS...WHILE HIGH LOW
LEVEL MOISTURE VALUES AND BACKED LOW LEVEL WINDS POSE A RISK OF
ISOLATED TORNADOES.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.
MEAN STORM MOTION VECTOR 25030.


...HART

291,0804 262,0814 264,0825 293,0820

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 31, 10:29 PM EDT	Mesoscale Discussion	SPC	Flagler, Hernando, Hillsborough, Lake, Manatee, Marion and 4 more	2 hr
Jun 1, 12:28 AM EDT	Mesoscale Discussion	SPC	Charlotte, DeSoto, Hardee, Hillsborough, Lake, Lee and 8 more	92 min
Jun 1, 3:23 AM EDT	Mesoscale Discussion	SPC	Brevard, Charlotte, Collier, DeSoto, Glades, Hardee and 19 more	2 hr
Jun 1, 5:40 AM EDT	Tornado Watch	SPC	Brevard, Collier, Glades, Hendry, Highlands, Indian River and 5 more	5 hr
Jun 1, 8:31 AM EDT	Mesoscale Discussion	SPC	Brevard, Collier, Glades, Hendry, Highlands, Indian River and 5 more	89 min
Jun 1, 10:15 AM EDT	Mesoscale Discussion	SPC	Brevard, Collier, Glades, Hendry, Highlands, Indian River and 5 more	60 min
Jun 1, 11:54 AM EDT	Mesoscale Discussion	SPC	Hamilton, Jefferson, Madison	2 hr

Nearby

Tornado Watches in Florida, 2005 Every 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.