Tornadoes · United States · New Jersey · 1999

F2 tornado, Beach Haven, New Jersey, August 20, 1999

This F2 tornado ran 0.4 miles across Ocean County on August 20, 1999, touching down at 3:50 PM EDT and reaching 100 yards wide. It killed nobody and injured 1, and did $4.2 million of property damage.

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 mph

    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 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. 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
F2
Date
August 20, 1999
Touchdown
3:50 PM EDT (19:50 UTC)
Path length
0.4 miles (0.6 km)
Path width
100 yards (91 m)
Deaths
0
Injuries
1
Property damage
$4.2 million
County
Ocean County
Touchdown point
39.550, -74.250
Lift-off point
39.550, -74.250
Record number
637

What the Weather Service recorded

A strong waterspout formed over the Atlantic Ocean just southeast of Beach Haven and moved northwest. It became a tornado as it moved across Long Beach Island around 350 p.m. EDT along the Beach Haven/Long Beach Township border. It briefly reached F2 intensity (on the Fujita Scale) as it crossed the island thus becoming one of the strongest tornadoes that ever started as a waterspout. It was also the first strong (F2 or F3 tornado on the Fujita Scale) tornado to occur in Ocean County since July 21, 1983. The tornado crossed back into Little Egg Harbor thus becoming a waterspout again and dissipated before reaching Barrel Island. Damage was estimated at 4.2 million dollars. About 35 homes and buildings were damaged as were about 50 vehicles and 5 boats. The worst damage occurred to the Sea Spray Motel. The motel and two other homes were condemned in Long Beach Township. One woman staying at the motel was injured (severe hand laceration) by flying glass. About 165 persons were displaced, 150 of them were vacationing at the Sea Spray Motel. The tornado also knocked down two main transmission lines from the mainland to the substation on Long Beach Island. About 3,100 homes and businesses lost power, mainly in the vicinity of the tornado. All power was restored around 10 p.m. EDT. The tornado's path length was about 0.4 of a mile and its path width was about 100 yards. The highest winds were estimated at 120 mph. A house on Nelson Street on the northern side of the tornado measured a peak wind gust of 95 mph. The tornado started as a waterspout in the Atlantic Ocean. It moved northwest and made landfall in the Holgate section of Long Beach Township. An oceanfront house on South Bay Avenue suffered severe window and siding damage and also had its chimney knocked down. This was one of the three condemned structures. The tornado also sent the home's recliner airborne and snapped several trees. Several houses surrounding this one suffered minor damage. The tornado then crossed the main street of Long Beach Boulevard and then inflicted major damage to the Sea Spray Motel. The tornado plucked a section of the roof covering nine rooms, and tore the eaves off another section of roof above eight other rooms. Many windows were shattered and debris from the hotel was found 1,000 feet away. The motel's back wall became structurally unsound and its roof landed on and badly damaged a playground on Nelson Avenue. The motel's chain link fence also was knocked down. The third home that was condemned was on the back (northwest) side of the motel as flying debris damaged it. The tornado continued to move northwest along the township border. Numerous homes had windows damaged, siding and shingles stripped and garage doors and decks ripped away. Barbecue grills and lawn furniture (some stuck in trees) were tossed. Numerous trees were also snapped. On Nelson Avenue, one of the more heavily damaged houses in Beach Haven lost its garage and two air conditioning units were blown into the home. The residents found a 1 by 2 board driven into the house's siding. Another nearby deck beam had a 12 inch stake driven into it. The tornado entered Little Egg Harbor near Grosser Street and sunk a boat. The waterspout dissipated on the bay before reaching Barrel Island. Damage in Long Beach Township was estimated at 4 million dollars, a third of which was damage to the Sea Spray Motel. Damage in Beach Haven Borough was estimated at 200,000 dollars. Other thunderstorms over the nearby Atlantic also caused tragic results. The violent weather offshore apparently capsized a 23 foot long wellcraft about 70 miles southeast of Atlantic City. Three men on board drowned. One body was recovered about 30 miles east of Cape May.

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.

Issued (UTC)ExpiredProductOffice
20:40 UTC23:40 UTCFlash Flood WarningPHI

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 17:01 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.

Phillips Aaf/Abe, MD (KAPG), 12:00Z

7.8 hours before the tornado, 159 km from the path. August 20, 1999.

Skew-T log-pSkew-T log-p diagram, Phillips Aaf/Abe, MD at 12:00Z on 1999-08-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 362 joules per kilogram, CIN -7, lifted condensation level 639 meters above ground. Wind barbs in knots down the right edge.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 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, Phillips Aaf/Abe, MD at 12:00Z on 1999-08-20The 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 21 square meters per square second, 0 to 6 km bulk shear 31 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
362 J/kg
Mixed-layer CIN
-7 J/kg
Surface CAPE
648 J/kg
Mixed-layer LCL
639 m above ground
0-6 km bulk shear
31 kt
0-1 km bulk shear
4 kt
0-1 km storm-relative helicity
21 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

The surface observations

Atlantic City International (ACY), 30 km from the path, in the two hours either side.

Time (UTC)Temp (°F)Dew point (°F)WindGust (kt)Pressure (mb)Weather
17:54 UTC706950° 10 kt1015.6+RA BR
17:58 UTC69.869.840° 8 kt1015.2+RA BR
18:05 UTC69.869.850° 14 kt181015.2+RA BR
18:14 UTC69.869.860° 12 kt1015.2+RA BR
18:47 UTC71.669.8290° 11 kt161015.6+RA BR
18:54 UTC7169330° 10 kt161015.6+RA BR
19:01 UTC71.669.8250° 10 kt151015.6+RA BR
19:12 UTC71.669.8 3 kt1015.6+RA BR
19:18 UTC71.669.8200° 3 kt1015.6
19:54 UTC7572 5 kt1015.2
20:01 UTC75.271.6100° 5 kt1015.2
20:54 UTC7672110° 7 kt1014.9
21:03 UTC75.271.6100° 7 kt1014.9

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

This ground now

The live radar over the trackEvery 1999 tornado in New JerseyEvery tornado in New Jersey since 1950Warnings in force in New Jersey nowThe forecast where you are

The other tornadoes of August 20, 1999

1 more were confirmed in the United States that day.

DateTimeRatingWherePath (mi)Width (yd)DeathsInjuriesDamage
August 207:00 PM EDTF1Adams, PA0.240

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.