Tornadoes · United States · Louisiana · 2025

EF0 tornado, Westwego Arpt to Marrero, Louisiana, May 2, 2025

From Westwego Arpt to Marrero, this EF0 tornado ran 0.5 miles across Jefferson Parish on May 2, 2025, touching down at 8:20 PM CDT and reaching 20 yards wide. It killed nobody, and did $15,000 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 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 2, 2025
Touchdown
8:20 PM CDT (01:20 UTC)
Lifted
8:22 PM CDT (01:22 UTC)
On the ground
2 minutes
Path length
0.5 miles (0.7 km)
Path width
20 yards (18 m)
Deaths
0
Injuries
0
Property damage
$15,000
County
Jefferson Parish
Touchdown point
29.879, -90.111
Lift-off point
29.885, -90.108
Record number
2505021920-01

The damage survey

11 damage points were recorded along this path by NWS LIX, in the Damage Assessment Toolkit the survey teams carry. The strongest indicator was rated EF0. The highest wind the damage implies is 83 mph.

  • No connections and no other shingle damage or tree damage. Leaves blown around.
  • Wind adjusted to lower bounds due to no connections and lack of damage to surrounding trees. Tossed to NW.
  • Fence blown into other fence. SE to SW.
  • This roof damage with the blue tarp is old. Grey looks new but can’t tell.

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

Widespread thunderstorm activity developed ahead of an approaching cold front. A disturbance moving across the western Gulf in the morning enhanced storm intensities which resulted in scattered wind damage reports northwest of Baton Rouge. Then, later in the day, a storm along the actual cold front spun off a weak tornado in the New Orleans area.

A brief EF-0 tornado with maximum winds of 80 mph touched down on the southeast side of Belle Terre Playground in Marrero, LA and tracked northeast. A shed was flipped near the starting point with no other damage found to the southwest. Another shed with no connection points was rolled on it's side on Adam Drive with minor roof damage noted to the home. A few other houses with minor roof damage were observed along the track to the northeast. On Victorian Drive, a small shed that was tied down with a few straps and posts in concrete was thrown northeast with other debris thrown northwest. Minor roof damage was also noted in this area. No damage was observed in the trees at the end of Marine Street and no damage was found farther to the northeast.

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 forecast that day

The Storm Prediction Center had this point in a Slight Risk. The outlook in force was issued at 01:00 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.

Slidell Radar S, LA (KSIL), 00:00Z

1.3 hours before the tornado, 57 km from the path. May 3, 2025.

Skew-T log-pSkew-T log-p diagram, Slidell Radar S, LA at 00:00Z on 2025-05-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 1724 joules per kilogram, CIN -1, lifted condensation level 893 meters above ground. Wind barbs in knots down the right edge.LCLEL10008507005003002001001 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, Slidell Radar S, LA at 00:00Z on 2025-05-03The 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 72 square meters per square second, 0 to 6 km bulk shear 23 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
1724 J/kg
Mixed-layer CIN
-1 J/kg
Surface CAPE
2709 J/kg
Mixed-layer LCL
893 m above ground
0-6 km bulk shear
23 kt
0-1 km bulk shear
14 kt
0-1 km storm-relative helicity
72 m²/s²
0-3 km storm-relative helicity
100 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.7
0-3 km lapse rate
6.5 K/km

Open this sounding in Storm Lab

Slidell Radar S, LA (KSIL), 12:00Z

10.7 hours after it, 57 km from the path. May 3, 2025.

Skew-T log-pSkew-T log-p diagram, Slidell Radar S, LA at 12:00Z on 2025-05-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 14 joules per kilogram, CIN -162, lifted condensation level 842 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, Slidell Radar S, LA at 12:00Z on 2025-05-03The 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 104 square meters per square second, 0 to 6 km bulk shear 39 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
14 J/kg
Mixed-layer CIN
-162 J/kg
Surface CAPE
86 J/kg
Mixed-layer LCL
842 m above ground
0-6 km bulk shear
39 kt
0-1 km bulk shear
24 kt
0-1 km storm-relative helicity
104 m²/s²
0-3 km storm-relative helicity
-24 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0
0-3 km lapse rate
4.9 K/km

Open this sounding in Storm Lab

The surface observations

New Orleans Nas (NBG), 10 km from the path, in the two hours either side.

Time (UTC)Temp (°F)Dew point (°F)WindGust (kt)Pressure (mb)Weather
23:55 UTC7869170° 8 kt1011.9
00:16 UTC7771190° 6 kt1012.2TS
00:22 UTC7770170° 5 kt1011.9TS
00:55 UTC7671190° 7 kt1012.2TS
01:55 UTC75720° 0 kt1012.5TS
02:05 UTC73710° 0 kt1012.5
02:55 UTC7672190° 5 kt1012.9

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

The radar

The Hammond radar (KHDC), 76 km away, was scanning. The volume nearest the touchdown began at 01:22 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
01:20 UTCTSTM WND DMG1 Se MarreroJefferson, LAReported roof damage and a shed tossed into a street between Lapalco Blvd near Belle Terre Rd and Avenue F near Patriot Street. Possible tornado. Time estimated by radar.
01:20 UTCTORNADOMarreroJefferson, LACorrects previous tstm wnd dmg report from 1 SE Marrero. A brief EF-0 tornado touched down on the southeast side of Belle Terre Playground in Marrero, LA and tracked northeast flipping a shed and causing minor roof damag

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

This ground now

The live radar over the trackEvery 2025 tornado in LouisianaEvery tornado in Louisiana since 1950Warnings in force in Louisiana nowThe forecast where you are

The other tornadoes of May 2, 2025

2 more were confirmed in the United States that day.

DateTimeRatingWherePath (mi)Width (yd)DeathsInjuriesDamage
May 21:53 AM CDTEF0Cotton, OK0.630$25,000
May 26:55 PM EDTEF1Hall, GA2.8150

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.