EF0 tornado, South Manor, New York, September 2, 2019

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.

Rating

EF0

Date

September 2, 2019

Touchdown

4:33 PM EDT (20:33 UTC)

Lifted

4:38 PM EDT (20:38 UTC)

On the ground

5 minutes

Path length

1.6 miles (2.6 km)

Path width

50 yards (46 m)

Deaths

0

Injuries

0

Property damage

$75,000

County

Suffolk County

Touchdown point

40.842, -72.831

Lift-off point

40.865, -72.823

Record number

1909021433-01

A cold front in tandem with a mid level disturbance triggered severe thunderstorms, including a tornado in Manorville.

A severe thunderstorm moving northeast over Mastic/Shirley and |then into Manorville in southeast Suffolk County produced an EF0 |tornado. The tornado first touched down on Dayton Street, about |400 yards south of the intersection of South Street and Dayton |Avenue in Manorville. It sheared large tree limbs and the tops off|of dozens of oak, maple and pine trees, as well as uprooting at |least a dozen shallow rooted large trees. Several electric poles |were downed by falling trees on this block, with collateral tree |damage noted to a few houses in the neighborhood. The tornado |continued northeast through the south end of neighboring Rosewood |Street and then across its intersecting cross street of South |Street. Several more trees were uprooted, large limbs broken, or |tree tops sheared on this leg of its path. Facing houses on the |north and south side of South Street had widespread tree damage |and uprooting. A shed was destroyed in this location as well, |with damage to residences in the form of sporadic blown off |shingles and siding, missing storm screens, and a couple of broken|windows. The tornado then continued northeast through a wooded |area, where more tree damage was noted, before crossing the Long |Island Expressway near Exit 69 while lifting. The path of tree |damage and debris ended on the service road on the north side of |the LIE near the intersection with Wading River Road.

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

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.

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 Storm Prediction Center had this point in a Marginal Risk, with a 0.02 chance of a tornado within 25 miles. The outlook in force was issued at 20:00 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 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.

The Brookhaven radar (KOKX), 3 km away, was scanning. The volume nearest the touchdown began at 20:33 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.

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

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

The live radar over the trackEvery 2019 tornado in New YorkEvery tornado in New York since 1950Warnings in force in New York nowThe forecast where you are

2 more were confirmed in the United States that day.

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.

NOAA Storm Prediction Center tornado database, 1950-2025, the official record kept by NOAA's Storm Prediction Center.