Tornadoes · United States · Florida · 2000

F0 tornado, Palm Harbor, Florida, August 12, 2000

This F0 tornado ran 2.3 miles across Pinellas County on August 12, 2000, touching down at 1:50 PM EDT and reaching 10 yards wide. It killed nobody, and did $500,000 of property damage.

The rating scale

Tracks are drawn in the color of the rating. The Fujita scale rates the damage rather than measuring the wind: the speeds are what that damage is taken to imply.

  1. F040 to 72 mphthis tornado

    Light damage. Surface peeled off some roofs, gutters and siding damaged, branches broken, shallow-rooted trees pushed over.

  2. F173 to 112 mph

    Moderate damage. Roofs badly stripped, mobile homes overturned or badly damaged, exterior doors lost, windows broken.

  3. F2113 to 157 mph

    Considerable damage. Roofs torn off well-built houses, frame homes shifted on their foundations, mobile homes destroyed, large trees snapped or uprooted, cars lifted off the ground.

  4. F3158 to 206 mph

    Severe damage. Whole stories of well-built houses destroyed, large buildings badly damaged, trains overturned, trees debarked, heavy cars lifted and thrown.

  5. F4207 to 260 mph

    Devastating damage. Well-built houses leveled, structures with weak foundations moved some distance, cars thrown and large missiles generated.

  6. F5261 to 318 mph

    Incredible damage. Strong frame houses swept off their foundations, car-sized missiles thrown more than 100 meters, steel-reinforced concrete badly damaged, high-rise buildings deformed.

  7. Unrated

    The survey recorded a tornado but could not put a number on it, most often because it crossed open country and damaged nothing a rating can be read from.

The record

Rating
F0
Date
August 12, 2000
Touchdown
1:50 PM EDT (17:50 UTC)
Path length
2.3 miles (3.7 km)
Path width
10 yards (9 m)
Deaths
0
Injuries
0
Property damage
$500,000
County
Pinellas County
Touchdown point
28.100, -82.780
Lift-off point
28.100, -82.750
Record number
495

What the Weather Service recorded

A waterspout moved onshore as a small F0 tornado, estimated maximum winds of 60 to 70 mph, at Carlyle Circle on Indian Bluff Island, two miles northwest of Palm Harbor. The micro sized tornado moved southeast and caused sporadic roof tile, lanai, boat dock and tree damage along Arrow and Carlyle Drives. The tornado continued southeast and caused sporadic roof tile and tree damage along Phillips Way. The small tornado continued southeast and destroyed the rear lanai of a home and caused structural damage to the second floor lanai and rear roof of a second home at the intersection of Ocean View Avenue and the Pinellas Trail.The tornado track shifted slightly to an east-southeast direction and crossed U.S. Highway Alternate 19 at the intersection of De Soto Boulevard where it caused sporadic tree and roof tile damage. The micro sized tornado damage path shrank to less than 10 yards wide as it moved over a heavily tree filled subdivision north of County Road 816 (Alderman Road). The tornado snapped several pine trees and toppled a few large oak trees along a narrow path that traversed Enniswood Parkway, Enisgrove Drive North, Glenside Avenue, Glenwood Court, Crestwood Lane, Harvest Moon Drive, Rolling Woods Drive, Eaglenest, Lepprechaun Lane, Pine Hill Road before it lifted and dissipated near the intersection of Alderman and Belcher Roads.

From NOAA NCEI's Storm Events Database, the narrative the local forecast office wrote for Storm Data.

The warnings

No tornado warning for this county appears in the archive as in force at the moment the tornado touched down.

Every warning and watch covering the touchdown point that day, from the Iowa Environmental Mesonet's archive of National Weather Service products. Lead time is measured from the issue of the warning in force to the touchdown time in the database, both of which were recorded to the minute by different people.

The forecast that day

The Storm Prediction Center had this point in a General Thunderstorms Risk. The outlook in force was issued at 16:45 UTC.

SPC's Day 1 convective outlook as it stood when the tornado began, read at the touchdown point. The same archive is on the radar archive.

The air that afternoon

The radiosonde launches on either side of the tornado, from the nearest station that was launching then, drawn and analyzed the way Storm Lab does: the same diagram, the same parcel and shear definitions SPC's mesoanalysis uses.

Tampa Bay, FL (KTBW), 12:00Z

5.8 hours before the tornado, 57 km from the path. August 12, 2000.

Skew-T log-pSkew-T log-p diagram, Tampa Bay, FL at 12:00Z on 2000-08-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 1157 joules per kilogram, CIN -24, lifted condensation level 877 meters above ground. Wind barbs in knots down the right edge.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed. The warm shading is its CAPE, the cool shading the inhibition it has to break through.
HodographHodograph, Tampa Bay, FL at 12:00Z on 2000-08-12The wind through the lowest 10 kilometers as a curve, rings every 10 meters per second labeled in knots. Zero to 1 km storm-relative helicity 88 square meters per square second, 0 to 6 km bulk shear 21 knots.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km. RM and LM are the right and left moving storms Bunkers' method gives; the shaded area is the 0 to 1 km storm-relative helicity.
Mixed-layer CAPE
1157 J/kg
Mixed-layer CIN
-24 J/kg
Surface CAPE
228 J/kg
Mixed-layer LCL
877 m above ground
0-6 km bulk shear
21 kt
0-1 km bulk shear
18 kt
0-1 km storm-relative helicity
88 m²/s²
0-3 km storm-relative helicity
115 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.6
0-3 km lapse rate
4.9 K/km

Open this sounding in Storm Lab

Tampa Bay, FL (KTBW), 00:00Z

6.2 hours after it, 57 km from the path. August 13, 2000.

Skew-T log-pSkew-T log-p diagram, Tampa Bay, FL at 00:00Z on 2000-08-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 542 joules per kilogram, CIN -15, lifted condensation level 729 meters above ground. Wind barbs in knots down the right edge.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed. The warm shading is its CAPE, the cool shading the inhibition it has to break through.
HodographHodograph, Tampa Bay, FL at 00:00Z on 2000-08-13The wind through the lowest 10 kilometers as a curve, rings every 10 meters per second labeled in knots. Zero to 1 km storm-relative helicity 75 square meters per square second, 0 to 6 km bulk shear 22 knots.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km. RM and LM are the right and left moving storms Bunkers' method gives; the shaded area is the 0 to 1 km storm-relative helicity.
Mixed-layer CAPE
542 J/kg
Mixed-layer CIN
-15 J/kg
Surface CAPE
1683 J/kg
Mixed-layer LCL
729 m above ground
0-6 km bulk shear
22 kt
0-1 km bulk shear
17 kt
0-1 km storm-relative helicity
75 m²/s²
0-3 km storm-relative helicity
111 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.5
0-3 km lapse rate
5.4 K/km

Open this sounding in Storm Lab

The surface observations

Saint Petersburg (PIE), 22 km from the path, in the two hours either side.

Time (UTC)Temp (°F)Dew point (°F)WindGust (kt)Pressure (mb)Weather
15:53 UTC7774210° 6 kt1015.6RA BR
16:13 UTC7773.4200° 6 kt1015.6
16:53 UTC8076190° 9 kt1015.2
17:24 UTC82.475.2190° 12 kt1014.9
17:53 UTC8075190° 14 kt1014.2
18:00 UTC80.675.2180° 12 kt1013.9
18:11 UTC78.875.2260° 24 kt281015.6BR
18:16 UTC73.471.6230° 12 kt281014.9FG
18:25 UTC73.471.6350° 10 kt1014.9TSRA BR
18:33 UTC73.471.630° 5 kt1014.9TSRA BR
18:39 UTC73.471.690° 4 kt1014.9TSRA BR
19:00 UTC73.471.690° 8 kt1014.9TSRA BR
19:13 UTC73.473.4110° 6 kt1014.9TSRA BR
19:31 UTC73.473.4140° 5 kt1014.9-RA

From the Iowa Environmental Mesonet's archive of airport observations.

This ground now

The live radar over the trackEvery 2000 tornado in FloridaEvery tornado in Florida since 1950Warnings in force in Florida nowThe forecast where you are

What this means

Ratings are the survey's, read off the damage rather than measured; the rating scale is above. Tornado counts rise through the record as reporting improved, so a year in the 1950s is not comparable with one today except for the strongest tornadoes, which were always noticed.

Sources

NOAA Storm Prediction Center tornado database, 1950-2025, the official record kept by NOAA's Storm Prediction Center.