Tornadoes · United States · Florida · 2024

EF0 tornado, Polk County, Florida, September 26, 2024

This EF0 tornado ran 1.1 miles across Polk County on September 26, 2024, touching down at 10:20 AM EDT and reaching 25 yards wide. It killed nobody.

The rating scale

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

  1. EF065 to 85 mphthis tornado

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

  2. EF186 to 110 mph

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

  3. EF2111 to 135 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. EF3136 to 165 mph

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

  5. EF4166 to 200 mph

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

  6. EF5over 200 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
EF0
Date
September 26, 2024
Touchdown
10:20 AM EDT (14:20 UTC)
Lifted
10:22 AM EDT (14:22 UTC)
On the ground
2 minutes
Path length
1.1 miles (1.7 km)
Path width
25 yards (23 m)
Deaths
0
Injuries
0
County
Polk County
Touchdown point
28.028, -81.642
Lift-off point
28.042, -81.638
Record number
2409260820-01

The warnings

No tornado warning for this county appears in the archive as in force at the moment the tornado touched down. One was issued for the county at another hour that day.

The county was under a tornado watch, issued at 10:45 UTC and running to 23:52 UTC.

Issued (UTC)ExpiredProductOffice
00:00 UTC09:11 UTCFlood WatchTBW
10:45 UTC23:52 UTCTornado WatchTBW
22:47 UTC23:00 UTCTornado WarningTBW
23:52 UTC06:25 UTCTornado WatchTBW

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 Slight Risk, with a 0.05 chance of a tornado within 25 miles. The outlook in force was issued at 12:55 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

2.3 hours before the tornado, 83 km from the path. September 26, 2024.

Skew-T log-pSkew-T log-p diagram, Tampa Bay, FL at 12:00Z on 2024-09-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 446 joules per kilogram, CIN -10, lifted condensation level 678 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 2024-09-26The 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 408 square meters per square second, 0 to 6 km bulk shear 40 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
446 J/kg
Mixed-layer CIN
-10 J/kg
Surface CAPE
1801 J/kg
Mixed-layer LCL
678 m above ground
0-6 km bulk shear
40 kt
0-1 km bulk shear
42 kt
0-1 km storm-relative helicity
408 m²/s²
0-3 km storm-relative helicity
468 m²/s²
Significant tornado parameter
1.1
Supercell composite
16.2
0-3 km lapse rate
5.0 K/km

Open this sounding in Storm Lab

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

9.7 hours after it, 83 km from the path. September 27, 2024.

Skew-T log-pSkew-T log-p diagram, Tampa Bay, FL at 00:00Z on 2024-09-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 0 joules per kilogram, CIN -6795, lifted condensation level 869 meters above ground. Wind barbs in knots down the right edge.LCL10008507005003002001001 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 00:00Z on 2024-09-27The 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 32 square meters per square second, 0 to 6 km bulk shear 17 knots.1939587897117Sfc1 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
0 J/kg
Mixed-layer CIN
-6795 J/kg
Surface CAPE
0 J/kg
Mixed-layer LCL
869 m above ground
0-6 km bulk shear
17 kt
0-1 km bulk shear
17 kt
0-1 km storm-relative helicity
32 m²/s²
0-3 km storm-relative helicity
211 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0
0-3 km lapse rate
4.7 K/km

Open this sounding in Storm Lab

The radar

The Tampa radar (KTBW), 83 km away, was scanning. The volume nearest the touchdown began at 14:20 UTC.

Open the radar archive at this moment, over the track

Reflectivity and velocity, decoded from the Level II archive in the browser. Volumes take a few seconds to open the first time.

This ground now

The live radar over the trackEvery 2024 tornado in FloridaEvery tornado in Florida since 1950Warnings in force in Florida nowThe forecast where you are

The other tornadoes of September 26, 2024

14 more were confirmed in the United States that day.

DateTimeRatingWherePath (mi)Width (yd)DeathsInjuriesDamage
September 265:53 AM EDTEF0Burke, GA2.350$5,000
September 267:03 AM EDTEF0Beaufort, SC6.5150
September 267:20 AM EDTEF0Beaufort, SC1.3100
September 2610:39 AM EDTEF1Orangeburg, SC13.41,100
September 2612:03 PM EDTEF1Wilkes, NC0.475$15,000
September 2612:52 PM EDTEF1Bamberg, SC7.8150
September 262:30 PM EDTEF0Coffee, GA0.530
September 268:11 PM EDTEF0Alamance, NC0.350$22,000
September 268:56 PM EDTEF1Wheeler, GA0.7752
September 2610:17 PM EDTEF0Clarendon, SC1.350
September 2612:33 AM EDTEF1Orangeburg, SC33.4800
September 261:15 AM EDTEF0Orangeburg, SC13.8500
September 261:29 AM EDTEF0Beaufort, SC3.9175
September 261:52 AM EDTEF1Calhoun, SC13.7710

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.