Tornadoes · United States · Florida · 2000

F0 tornado, Port Charlotte to North Port, Florida, September 17, 2000

From Port Charlotte to North Port, this F0 tornado ran 18.0 miles across Charlotte and Sarasota counties on September 17, 2000, touching down at 5:43 AM EDT. It killed nobody, and did $140,000 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
September 17, 2000
Touchdown
5:43 AM EDT (09:43 UTC)
Path length
18.0 miles (29.0 km)
Path width
0 yards (0 m)
Deaths
0
Injuries
0
Property damage
$140,000
Counties
Charlotte and Sarasota counties
Touchdown point
26.900, -82.100
Lift-off point
27.230, -81.970
Record number
550

What the Weather Service recorded

A fast moving tornado, associated with an outer rainband of Hurricane Gordon, briefly touched down near the Port Charlotte Yacht Club and Public Beach near Harbor Boulevard in Port Charlotte. The tornado continued to sporadically touch down along a narrow path as it moved rapidly north northwest across Charlotte county. The tornado damaged the roofs of a few homes, a couple of carports and downed a few trees, power lines and large branches before it crossed into Sarasota County.

A short lived tornado, that originated in Charlotte county and was associated with an outer rainband of Hurricane Gordon, briefly touched down, snapped a few trees, downed power lines and damaged a few carports, east of the intersection of Interstate 75 and Toledo Blade Boulevard. The tornado continued to sporadically touch down along a narrow path as it moved rapidly north across Interstate 75 over rural southeast Sarasota county before it lifted and dissipated.

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 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), 00:00Z

9.7 hours before the tornado, 80 km from the path. September 17, 2000.

Skew-T log-pSkew-T log-p diagram, Tampa Bay, FL at 00:00Z on 2000-09-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 238 joules per kilogram, CIN -13, lifted condensation level 927 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 2000-09-17The 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 53 square meters per square second, 0 to 6 km bulk shear 9 knots.193958Sfc1 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
238 J/kg
Mixed-layer CIN
-13 J/kg
Surface CAPE
3081 J/kg
Mixed-layer LCL
927 m above ground
0-6 km bulk shear
9 kt
0-1 km bulk shear
16 kt
0-1 km storm-relative helicity
53 m²/s²
0-3 km storm-relative helicity
293 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.7
0-3 km lapse rate
6.1 K/km

Open this sounding in Storm Lab

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

2.3 hours after it, 80 km from the path. September 17, 2000.

Skew-T log-pSkew-T log-p diagram, Tampa Bay, FL at 12:00Z on 2000-09-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 15 joules per kilogram, CIN -26, lifted condensation level 651 meters above ground. Wind barbs in knots down the right edge.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 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 2000-09-17The 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 433 square meters per square second, 0 to 6 km bulk shear 66 knots.19395878Sfc1 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
15 J/kg
Mixed-layer CIN
-26 J/kg
Surface CAPE
13 J/kg
Mixed-layer LCL
651 m above ground
0-6 km bulk shear
66 kt
0-1 km bulk shear
36 kt
0-1 km storm-relative helicity
433 m²/s²
0-3 km storm-relative helicity
640 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2
0-3 km lapse rate
4.1 K/km

Open this sounding in Storm Lab

The surface observations

Punta Gorda (PGD), 17 km from the path, in the two hours either side.

Time (UTC)Temp (°F)Dew point (°F)WindGust (kt)Pressure (mb)Weather
07:53 UTC706860° 14 kt1009.5-RA BR
08:26 UTC69.86870° 17 kt1009.1RA BR
08:53 UTC716970° 15 kt1009.1RA BR
09:03 UTC71.669.870° 17 kt1008.1RA BR
09:41 UTC71.669.860° 16 kt231007.5RA BR
09:53 UTC7271170° 13 kt171009.1+RA BR
10:03 UTC73.471.6110° 10 kt1009.1+RA BR
10:11 UTC73.473.4120° 11 kt1009.1+RA BR
10:24 UTC75.273.4100° 19 kt241009.1RA BR
10:32 UTC75.273.4140° 12 kt241009.8+RA BR
10:39 UTC75.273.4150° 9 kt1010.2+RA BR
10:53 UTC7471180° 13 kt291011.2+RA BR
10:55 UTC73.471.6180° 11 kt241011.2RA BR
11:09 UTC73.471.6170° 12 kt171011.5RA BR

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

The other tornadoes of September 17, 2000

5 more were confirmed in the United States that day.

DateTimeRatingWherePath (mi)Width (yd)DeathsInjuriesDamage
September 174:43 AM EDTF1Lee, FL18.020$2.0 million
September 175:33 AM EDTF1Lee, FL14.060$1.0 million
September 178:15 AM EDTF0Highlands, FL17.00$30,000
September 1710:15 AM EDTF0Broward, FL0.220$50,000
September 175:45 PM EDTF0Volusia, FL0.580$10,000

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.