Tornadoes · United States · Florida · 2005

F0 tornado, Largo, Florida, June 23, 2005

This F0 tornado ran 0.5 miles across Pinellas County on June 23, 2005, touching down at 4:28 PM EDT and reaching 40 yards wide. It killed nobody.

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
June 23, 2005
Touchdown
4:28 PM EDT (20:28 UTC)
Path length
0.5 miles (0.8 km)
Path width
40 yards (37 m)
Deaths
0
Injuries
0
County
Pinellas County
Touchdown point
27.880, -82.770
Lift-off point
27.900, -82.770
Record number
119

What the Weather Service recorded

Emergency Management reported a tornado along State Road 688 (Ulmerton Road) but there was no damage.

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

The warnings

3 minutes of warning. NWS TBW issued a tornado warning for this county at 20:25 UTC, 3 minutes before the tornado touched down, in force until 20:44 UTC.

Issued (UTC)ExpiredProductOffice
20:25 UTC20:44 UTCTornado 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 General Thunderstorms Risk. The outlook in force was issued at 22:45 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

8.5 hours before the tornado, 42 km from the path. June 23, 2005.

Skew-T log-pSkew-T log-p diagram, Tampa Bay, FL at 12:00Z on 2005-06-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 69 joules per kilogram, CIN -106, lifted condensation level 904 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 2005-06-23The 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 -7 square meters per square second, 0 to 6 km bulk shear 2 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
69 J/kg
Mixed-layer CIN
-106 J/kg
Surface CAPE
76 J/kg
Mixed-layer LCL
904 m above ground
0-6 km bulk shear
2 kt
0-1 km bulk shear
9 kt
0-1 km storm-relative helicity
-7 m²/s²
0-3 km storm-relative helicity
46 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0
0-3 km lapse rate
5.0 K/km

Open this sounding in Storm Lab

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

3.5 hours after it, 42 km from the path. June 24, 2005.

Skew-T log-pSkew-T log-p diagram, Tampa Bay, FL at 00:00Z on 2005-06-24Temperature 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 -55, lifted condensation level 984 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 2005-06-24The 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 -59 square meters per square second, 0 to 6 km bulk shear 8 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
238 J/kg
Mixed-layer CIN
-55 J/kg
Surface CAPE
1250 J/kg
Mixed-layer LCL
984 m above ground
0-6 km bulk shear
8 kt
0-1 km bulk shear
15 kt
0-1 km storm-relative helicity
-59 m²/s²
0-3 km storm-relative helicity
-26 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0
0-3 km lapse rate
5.3 K/km

Open this sounding in Storm Lab

The surface observations

Saint Petersburg (PIE), 8 km from the path, in the two hours either side.

Time (UTC)Temp (°F)Dew point (°F)WindGust (kt)Pressure (mb)Weather
18:53 UTC896740° 6 kt1015.6
19:53 UTC8872120° 11 kt1015.6
20:10 UTC80.669.8140° 14 kt221015.9VCTS
20:20 UTC78.869.8120° 19 kt271015.9TS
20:28 UTC78.869.8120° 18 kt251016.3-TSRA BR
20:34 UTC78.869.8130° 16 kt251015.9TSRA BR
20:43 UTC78.869.8120° 14 kt221015.9-TSRA BR
20:53 UTC7770120° 8 kt1016.6-TSRA BR
21:00 UTC7769.8120° 11 kt1016.6VCTS -RA BR
21:12 UTC7769.8110° 6 kt1016.6-TSRA
21:29 UTC7771.680° 7 kt1016.6-TSRA
21:39 UTC7771.690° 6 kt1016.6RA
21:53 UTC777260° 6 kt1016.6VCTS -RA
22:04 UTC7771.660° 7 kt1016.3VCTS -RA
22:11 UTC7771.680° 6 kt1016.3-RA
22:25 UTC7771.690° 5 kt1015.9-RA

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

The radar

The Tampa radar (KTBW), 42 km away, was scanning. The volume nearest the touchdown began at 20:27 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
19:35 UTCHEAVY RAIN 2.33 Sw Plant CityHillsborough, FLFELL IN 30 MINUTES. LOCALIZED STREET FLOODING. RAIN CONTINUES.
20:28 UTCTORNADOLargoPinellas, FLPUBLIC REPORT OF TORNADO TOUCHDOWN ALONG STATE ROAD 688. NO REPORTS OF DAMAGE.

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

This ground now

The live radar over the trackEvery 2005 tornado in FloridaEvery tornado in Florida since 1950Warnings in force in Florida nowThe forecast where you are

The other tornadoes of June 23, 2005

18 more were confirmed in the United States that day.

DateTimeRatingWherePath (mi)Width (yd)DeathsInjuriesDamage
June 232:58 PM CDTF0Benson, ND2.050
June 232:58 PM CDTF0Eddy, ND2.050
June 232:18 PM MDTF0Duchesne, UT0.50
June 233:40 PM CDTF1Pembina, ND4.0100
June 233:45 PM CDTF0Cavalier, ND0.225
June 234:14 PM CDTF1Walsh, ND2.5100
June 234:18 PM CDTF0Pembina, ND2.050
June 234:22 PM CDTF2Kittson, MN1.0200
June 235:15 PM CDTF1Lake of the Woods, MN5.0100
June 235:22 PM CDTF2Polk, MN2.0200
June 235:34 PM CDTF2Polk, MN1.5200
June 235:44 PM CDTF0Polk, MN0.250
June 235:48 PM CDTF1Polk, MN5.0100
June 236:20 PM CDTF0Polk, MN0.250
June 236:10 PM MDTF0Navajo, AZ1.050
June 237:25 PM CDTF1Clay, MN2.0100
June 237:35 PM CDTF1Clearwater, MN5.0100
June 238:20 PM CDTF1Beltrami, MN2.0100

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.