Tornadoes · United States · Florida · 2023

EF2 tornado, Clearwater Beach to Ozona, Florida, October 11, 2023

From Clearwater Beach to Ozona, this EF2 tornado ran 5.0 miles across Pinellas County on October 11, 2023, touching down at 1:47 AM EDT and reaching 300 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 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 mph

    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 mphthis tornado

    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
EF2
Date
October 11, 2023
Touchdown
1:47 AM EDT (05:47 UTC)
Lifted
1:55 AM EDT (05:55 UTC)
On the ground
8 minutes
Path length
5.0 miles (8.0 km)
Path width
300 yards (274 m)
Deaths
0
Injuries
0
Property damage
$500,000
County
Pinellas County
Touchdown point
28.003, -82.829
Lift-off point
28.057, -82.775
Record number
2310112347-01

The damage survey

15 damage points were recorded along this path by NWS TBW, in the Damage Assessment Toolkit the survey teams carry. The strongest indicator was rated EF2. The highest wind the damage implies is 115 mph.

  • Complete uplift of the roof. Awning damage. Awning damage to the two units to the south as well.
  • Partial uplift of the back side of the unit. Porch area destroyed. Awnings blown off.
  • Parking lot lights with cement poles damaged and one knocked completely down. Glass doors and windows broken. Box truck knocked over on its side into a car. Partial roof damage on one portion of a store with water leaking through and storefront out of square with building.
  • End of condo building tore off roof, and part of the side wall. Debris flung 500 yards.

Survey points are preliminary and are the raw material the published rating was built from. Source: NWS Damage Assessment Toolkit.

What the Weather Service recorded

A severe weather episode with an area of low pressure and associated cold front moving east across the Gulf of Mexico approaching the peninsula produced multiple supercell thunderstorms and likely waterspouts over the open waters before approaching the west Florida coast, where one waterspout was observed and multiple strong wind gusts were reported.

Tornadic waterspout came ashore, becoming a tornado near northern Clearwater Beach and continued across the Dunedin Channel before again coming ashore near Dunedin, near the intersection of the Dunedin Causeway and Hwy 19. Multiple homes in Clearwater Beach and Dunedin suffered at least minor roof damage, with a multi-story condominium building in Dunedin losing over a third of its roof along with part of the side wall, which was tossed about 500 yards away. A nearby strip mall also experienced partial roof loss and ensuing water damage, with a few damaged or destroyed concrete poles in its parking lot. Additionally, at least 3 other homes received mainly roof damage before the tornado dissipated just east of U.S. Hwy 19.

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.

The county was under a tornado watch, issued at 04:50 UTC and running to 10:55 UTC.

Issued (UTC)ExpiredProductOffice
20:16 UTC21:00 UTCMarine WarningTBW
22:57 UTC23:45 UTCMarine WarningTBW
02:27 UTC02:45 UTCMarine WarningTBW
03:22 UTC05:15 UTCMarine WarningTBW
04:50 UTC10:55 UTCTornado WatchTBW
05:11 UTC06:15 UTCMarine WarningTBW
06:00 UTC00:00 UTCSmall Craft AdvisoryTBW
06:41 UTC08:45 UTCMarine WarningTBW
08:54 UTC11:00 UTCMarine WarningTBW
12:52 UTC19:00 UTCTornado WatchTBW
14:16 UTC16:15 UTCMarine WarningTBW
16:10 UTC18:15 UTCMarine WarningTBW
18:14 UTC19:15 UTCMarine WarningTBW

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 00:44 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), 00:00Z

5.8 hours before the tornado, 53 km from the path. October 12, 2023.

Skew-T log-pSkew-T log-p diagram, Tampa Bay, FL at 00:00Z on 2023-10-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 553 joules per kilogram, CIN -26, lifted condensation level 922 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 2023-10-12The 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 154 square meters per square second, 0 to 6 km bulk shear 44 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
553 J/kg
Mixed-layer CIN
-26 J/kg
Surface CAPE
1700 J/kg
Mixed-layer LCL
922 m above ground
0-6 km bulk shear
44 kt
0-1 km bulk shear
20 kt
0-1 km storm-relative helicity
154 m²/s²
0-3 km storm-relative helicity
213 m²/s²
Significant tornado parameter
0.5
Supercell composite
5.5
0-3 km lapse rate
5.9 K/km

Open this sounding in Storm Lab

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

6.2 hours after it, 53 km from the path. October 12, 2023.

Skew-T log-pSkew-T log-p diagram, Tampa Bay, FL at 12:00Z on 2023-10-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 1960 joules per kilogram, CIN -4, lifted condensation level 717 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 2023-10-12The 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 241 square meters per square second, 0 to 6 km bulk shear 34 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
1960 J/kg
Mixed-layer CIN
-4 J/kg
Surface CAPE
3906 J/kg
Mixed-layer LCL
717 m above ground
0-6 km bulk shear
34 kt
0-1 km bulk shear
38 kt
0-1 km storm-relative helicity
241 m²/s²
0-3 km storm-relative helicity
307 m²/s²
Significant tornado parameter
1.9
Supercell composite
17.0
0-3 km lapse rate
5.5 K/km

Open this sounding in Storm Lab

The radar

The Tampa radar (KTBW), 53 km away, was scanning. The volume nearest the touchdown began at 05:43 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.

What was reported nearby

Local storm reports within 60 km of the path, in the three hours either side.

Time (UTC)ReportWhereCountyRemark
04:25 UTCFUNNEL CLOUD4 E HolidayPasco, FLCorrects previous funnel cloud report from 4 E Holiday. Funnel cloud spotted crossing SR 54 at Little Road.
04:25 UTCFUNNEL CLOUD4 E HolidayPasco, FLFunnel cloud spotted crossing SR 64 at Little Road.
06:17 UTCTORNADO2 Wsw OdessaPasco, FLDELAYED REPORT: Home camera captured tornado touchdown. lawn furniture thrown about, but no significant structural damage.

From the Iowa Environmental Mesonet's archive of National Weather Service local storm reports.

This ground now

The live radar over the trackEvery 2023 tornado in FloridaEvery tornado in Florida since 1950Warnings in force in Florida nowThe forecast where you are

The other tornadoes of October 11, 2023

3 more were confirmed in the United States that day.

DateTimeRatingWherePath (mi)Width (yd)DeathsInjuriesDamage
October 113:40 PM PDTEF0Clark, WA0.5100
October 1110:59 PM EDTEF0Sarasota, FL0.250$10,000
October 1112:13 AM EDTEF0Pinellas, FL0.350$50,000

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.