Tornadoes · United States · Florida · 2018

EF0 tornado, Loxahatchee, Florida, May 14, 2018

This EF0 tornado ran 1.5 miles across Palm Beach County on May 14, 2018, touching down at 5:34 AM EDT and reaching 50 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
May 14, 2018
Touchdown
5:34 AM EDT (09:34 UTC)
Lifted
5:38 AM EDT (09:38 UTC)
On the ground
4 minutes
Path length
1.5 miles (2.4 km)
Path width
50 yards (46 m)
Deaths
0
Injuries
0
County
Palm Beach County
Touchdown point
26.782, -80.287
Lift-off point
26.801, -80.300
Record number
1805140334-01

The damage survey

22 damage points were recorded along this path by NWS MFL, in the Damage Assessment Toolkit the survey teams carry. The strongest indicator was rated EF0. The highest wind the damage implies is 80 mph.

  • leaning WNW. rotation evident at this property. House door facing east was blown down
  • some shingles removed. tree branches split. evidence of rotation.
  • a few shingles removed. homeowner stated that he received warning on phone, occurred very shortly thereafter. estimated time around 545 am.
  • trees leaning west. a few shingles removed.

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

An upper level low over the eastern Gulf of Mexico allowed brought abundant tropical moisture to the region. With all of this moisture scattered showers and thunderstorms developed along sea breeze and outflow boundaries. A few of these storms became severe producing hail and a tornado.

A EF-0 tornado affected the community of The Acreage during the pre-dawn hours on May 14th. Damage consisted primary of snapped tree branches, uprooted trees and downed fences and power lines along the tornado's path. Several homes suffered minor roof damage in the form of shingles being blown off. Two homes sustained damage to side doors, and one home had a set of window panes blown out. Several sheds were damaged, a few horse stables lost their covering, and a chicken coop was destroyed. Estimated peak wind was in the 75-80 mph range.

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

The warnings

0 minutes of warning. NWS MFL issued a tornado warning for this county at 09:34 UTC, 0 minutes before the tornado touched down, in force until 09:49 UTC.

Issued (UTC)ExpiredProductOffice
09:10 UTC09:25 UTCTornado WarningMFL
09:34 UTC09:49 UTCTornado WarningMFL
09:35 UTC10:00 UTCTornado WarningMFL
09:58 UTC10:30 UTCTornado WarningMFL
11:07 UTC13:00 UTCFlood AdvisoryMFL

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 04:48 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.

Miami, FL (KMFL), 00:00Z

9.6 hours before the tornado, 108 km from the path. May 14, 2018.

Skew-T log-pSkew-T log-p diagram, Miami, FL at 00:00Z on 2018-05-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 97 joules per kilogram, CIN -17, lifted condensation level 831 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, Miami, FL at 00:00Z on 2018-05-14The 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 60 square meters per square second, 0 to 6 km bulk shear 37 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
97 J/kg
Mixed-layer CIN
-17 J/kg
Surface CAPE
1058 J/kg
Mixed-layer LCL
831 m above ground
0-6 km bulk shear
37 kt
0-1 km bulk shear
9 kt
0-1 km storm-relative helicity
60 m²/s²
0-3 km storm-relative helicity
77 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1
0-3 km lapse rate
5.6 K/km

Open this sounding in Storm Lab

Miami, FL (KMFL), 12:00Z

2.4 hours after it, 108 km from the path. May 14, 2018.

Skew-T log-pSkew-T log-p diagram, Miami, FL at 12:00Z on 2018-05-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 1337 joules per kilogram, CIN -6, lifted condensation level 686 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, Miami, FL at 12:00Z on 2018-05-14The 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 100 square meters per square second, 0 to 6 km bulk shear 25 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
1337 J/kg
Mixed-layer CIN
-6 J/kg
Surface CAPE
1938 J/kg
Mixed-layer LCL
686 m above ground
0-6 km bulk shear
25 kt
0-1 km bulk shear
22 kt
0-1 km storm-relative helicity
100 m²/s²
0-3 km storm-relative helicity
138 m²/s²
Significant tornado parameter
0.5
Supercell composite
3.3
0-3 km lapse rate
5.3 K/km

Open this sounding in Storm Lab

The radar

The Miami radar (KAMX), 132 km away, was scanning. The volume nearest the touchdown began at 09:36 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
09:34 UTCTORNADO2 Wnw The AcreagePalm Beach, FLNWS STORM SURVEY CONFIRMS AN EF-0 TORNADO TRAVELED 1.5 MILES IN THE ACREAGE. DAMAGE WAS OBSERVED TO HOMES AND TREES. START TIME ESTIMATED FROM RADAR AND DAMAGE SURVEY INTERVIEWS.
09:35 UTCTSTM WND DMG3 Wnw The AcreagePalm Beach, FLTRAINED SPOTTER REPORTS SNAPPED TREES, UPROOTED OAK TREES, AND DAMAGE TO AWNINGS IN THE KEY LIME BLVD AND SEMINOLE PRATT WHITNEY RD AREA. RADAR INDICATED TIME AROUND 535 AM EDT.

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

This ground now

The live radar over the trackEvery 2018 tornado in FloridaEvery tornado in Florida since 1950Warnings in force in Florida nowThe forecast where you are

The other tornadoes of May 14, 2018

11 more were confirmed in the United States that day.

DateTimeRatingWherePath (mi)Width (yd)DeathsInjuriesDamage
May 1410:35 AM EDTEF0Brevard, FL0.150$500
May 1412:25 PM EDTEF0Martin, FL0.150$8,000
May 146:35 PM CDTEF0Cowley, KS0.350
May 146:40 PM CDTEF0Cowley, KS0.150
May 149:26 PM CDTEF0Cowley, KS2.150
May 149:45 PM CDTEF2Cowley, KS0.875
May 149:48 PM CDTEF1Cowley, KS4.275
May 149:53 PM CDTEF0Cowley, KS0.350
May 149:56 PM CDTEF1Cowley, KS2.350
May 1410:06 PM CDTEF0Cowley, KS1.650
May 1410:22 PM CDTEF0Chautauqua, KS0.550

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.