Tornadoes · United States · New Jersey · 2021

EF2 tornado, Cedar Bridge to Barnegat Light, New Jersey, July 29, 2021

From Cedar Bridge to Barnegat Light, this EF2 tornado ran 4.2 miles across Ocean County on July 29, 2021, touching down at 9:03 PM EDT and reaching 75 yards wide. It killed nobody and injured 8.

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 mph

    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 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. 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
EF2
Date
July 29, 2021
Touchdown
9:03 PM EDT (01:03 UTC)
Lifted
9:13 PM EDT (01:13 UTC)
On the ground
10 minutes
Path length
4.2 miles (6.8 km)
Path width
75 yards (69 m)
Deaths
0
Injuries
8
County
Ocean County
Touchdown point
39.754, -74.191
Lift-off point
39.754, -74.112
Record number
2107291903-01

The damage survey

1 damage points were recorded along this path by NWS PHI, in the Damage Assessment Toolkit the survey teams carry. The highest wind the damage implies is 74 mph.

  • Uncertain if this is from the tornado

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

A strong shortwave trough moved east-southeastward out of the Great Lakes region on July 29. An associated, strengthening surface low also tracked out of the Great Lakes and into upstate New York. A warm front associated with this low moved through most of New Jersey and eastern Pennsylvania during the late morning and early afternoon hours. This front, combined with the remains of widespread convection to the west from the previous overnight and morning hours, brought significant cloud cover to the eastern mid-Atlantic for much of the day on the 29th. This was mainly in the form of mid and high level cloud cover, however, and temperatures still warmed to near seasonal levels behind the warm front, allowing moderate to strong instability to build. Meanwhile, the robust surface and upper level disturbances approaching the region brought both strong forcing and unseasonably strong wind shear. By mid-afternoon, an unusually favorable convective environment existed over eastern Pennsylvania and New Jersey.||The result of this environment was a rare tornado outbreak across the area. Initially, during the mid-afternoon hours, mixed convective modes over east-central Pennsylvania produced a couple instances of damaging wind and brief tornadoes as storms attempted to overcome cloud cover and some light stratiform rain in the area. With time, as storms moved into better instability and a less contaminated environment over far eastern Pennsylvania and New Jersey, they took on more supercellular structures. Multiple cyclic supercells would go on to produce several tornadoes, three of them strong (EF2+) over eastern Pennsylvania and New Jersey. Convection persisted past the sunset hour with little to no loss in intensity due to the strong forcing. The only thing that put an end to the outbreak was the coastline, as storms moved offshore towards 9 to 10PM local time. Even offshore, one supercell continued to exhibit strong rotation and likely produced a strong waterspout for tens of miles over the Atlantic.||Fortunately, and miraculously, no serious injuries or loss of life occurred as a result of this outbreak. With the passage of a cold front late on the evening of the 29th, cooler, drier, and much less active weather would grace the region for several days as clean-up efforts began.

The tornado estimated to have touched down in the New Jersey pine barrens over Burlington County moved into Ocean County, where damage was first observed. The bulk of the damage consisted of large snapped and uprooted pine and spruce |trees with a few red maple trees. Some of the heaviest damage occurred on Old|Cedar Bridge Rd near the Cedar Bridge Tavern Historic Site. The |tornado crossed Route 72 before moving through over a mile of |inaccessible forest land. Tree damage was found again along Jones |Rd. From there the tornado moved into the Wells Mills area where |the path of tree damage continued. A number of snapped trees and |large limbs were found in the area of Wells Mills County Park. The|tornado path appeared to end a few hundred yards east of this |location. The degree of tree damage along the middle portion of |the track was consistent with a higher end EF1 tornado.

The same supercell which produced a tornado in the New Jersey |Pine Barrens cycled and produced another tornado in far eastern |Ocean County. The tornado touched down near the immediate western |shore of Barnegat Bay. At least one building near Bay Beach off |Bayshore Dr sustained roofing damage. The tornado then moved over |Barnegat Bay as a waterspout. It came ashore in the area of High |Bar Harbor in Long Beach Twp.||The most severe damage was noted to a house on the corner of |Antioch Rd and Arnold Blvd. This house was facing west-southwest, |and had its entire roof structure lifted off and tossed one to two|houses to the east. The house walls remained standing but most of|the doors and windows on the east and west sides of the house |were completely blown out, with significant damage to the inside |of the house. A two- by-four from an adjacent house impaled the |wall on the west side of the house. Eight people were in the house|at the time the tornado hit, but they were able to take shelter |in an interior closet, with only minor injuries sustained. In |addition, on the north side of the house, a car in the driveway |was pushed sideways several feet and their boat flipped into their|neighbor's boat. The boat's trailer was tossed about 50 feet into|a house just to the east. The degree and orientation of damage |was consistent with tornadic winds of 115 to 120 mph, which is EF2|intensity.||Continuing east-northeast, about a dozen homes on the south side |of Arnold Blvd sustained significant uplift of roof material, |siding damage or removal, collapse of porch, patio, and sunroom |structures, and blown out windows. Several large trees were |uprooted and lay pointing to the east-northeast, as well as downed|power poles. ||The tornado moved east or slightly north of east from Arnold |Blvd, over an open salt marsh, before intersecting a few houses on|the corner of Collier Rd and Sunset Blvd. The most significant |damage was to a house on the northwest corner of Collier and |Sunset, which sustained siding damage, partial roof removal, |blowout of the storm surge walls on the basement level of the |elevated structure, and a large tree uprooted and laying to the |east-northeast. Power poles and large trees were downed on Sunset |Blvd, adjacent to the High Bar Harbor Yacht Club. There was damage|to several boats in the yacht club marina, but this was mainly |due to lofted debris being tossed into the marina. The circulation|then moved into the cove east of the marina. However, no further |significant damage was noted on the east side of the cover in |Barnegat Light, indicating the tornado had likely lifted. This is |corroborated by radar data which showed a weakening of the |circulation and a likely dissipation before it crossed into the |open Atlantic.

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

The warnings

24 minutes of warning. NWS PHI issued a tornado warning for this county at 00:39 UTC, 24 minutes before the tornado touched down, in force until 01:30 UTC.

The county was under a tornado watch, issued at 18:25 UTC and running to 02:00 UTC.

Issued (UTC)ExpiredProductOffice
18:25 UTC02:00 UTCTornado WatchPHI
22:44 UTC23:30 UTCTornado WarningPHI
22:56 UTC02:51 UTCFlash Flood WarningPHI
23:18 UTC23:34 UTCTornado WarningPHI
23:25 UTC00:15 UTCSevere Thunderstorm WarningPHI
23:28 UTC00:15 UTCSevere Thunderstorm WarningPHI
00:03 UTC01:00 UTCSevere Thunderstorm WarningPHI
00:03 UTC00:30 UTCTornado WarningPHI
00:19 UTC04:00 UTCFlash Flood WarningPHI
00:39 UTC01:30 UTCTornado WarningPHI
00:43 UTC04:00 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 Marginal Risk, with a 0.02 chance of a tornado within 25 miles. The outlook in force was issued at 01:01 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.

What forecasters said that day

The local office's own words before the tornado touched down, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Philadelphia/Mount Holly wrote its last area forecast discussion before the tornado touched down at Jul 29, 8:59 PM EDT, 4 minutes earlier.

Area forecast discussion, Jul 29, 8:59 PM EDT, 4 minutes before
Area Forecast Discussion
National Weather Service Mount Holly NJ
859 PM EDT Thu Jul 29 2021

.SYNOPSIS...
A warm front will lift north of the area this evening before a
cold front moves across the area tonight. High pressure located
across the Mid West on Friday will build toward the east coast
on Saturday. Another cold front is forecast to move across the
area later Sunday into Sunday night. High pressure may briefly
affect the area before an area of low pressure lifts north
offshore of the east coast on Tuesday. The frontal boundary to
our south may lift northward and affect the area for the middle
to end of next week.

&&

.NEAR TERM /UNTIL 6 AM FRIDAY MORNING/...
HAve extended the tornado watch through 10 PM for Monmouth and
Ocean Counties to account for the severe and tornado warned
storms to move off the coast.

The warm front is now north of our region. We could still see
thunderstorms from the line currently over central NY, but high
res models are consistent in showing that line weakening as it
gets closer to our region, so will keep the chance for
thunderstorms in the forecast, but do expect that the severe
risk should decrease once the cluster of storms over
central/South Jersey gets off the coast.

As the storms clear the coast, surface low pressure will be
located near the NY/Canada border and be dragging a surface cold
front through the area. Winds will slowly turn from the
northwest through the night with skies slowly clearing from the
west.

&&

.SHORT TERM /6 AM FRIDAY MORNING THROUGH FRIDAY NIGHT/...
Surface low pressure moves off to the northeast with its
attendant cold front offshore by Friday morning. With the front
offshore, the flow across the region will turn to the west and
settle out of the northwest. Winds may become gusty through the
afternoon, with gusts around 25 mph or so. Skies will be
relatively clear through the day and with dew points dropping
down into the 50s (potentially 40s in spots) it will feel nice
and dry and pretty comfortable for late July. The cooler air
being drawn into our region will be slightly below normal with
highs into the 70s through the southern Poconos, northwest New
Jersey and the Lehigh Valley and low to mid 80s through the rest
of the region. Depending on how far offshore the front moves,
we could see some temps remaining in the upper 80s for a while
across southern Delaware and nearby eastern Maryland.

Friday night will be cold when compared to what we typically
see in late July. The clear skies will help with radiative
cooling and with the winds dropping off overnight, we should see
things drop off decently overnight. Overnight lows will be a
chilly upper 40s to low 50s across the northern zones through
the Lehigh Valley and into portions of central New Jersey.
Around the urban corridor and through Delaware, Maryland, and
southern New Jersey, temperatures will be in the mid 50s to
lower 60s.

&&

.LONG TERM /SATURDAY THROUGH THURSDAY/...
The first half of the weekend is expected to be quiet, before
the potential for unsettle weather returns for the end of the
weekend through much of next week.

On Saturday, high pressure to the west will control the
weather, providing a dry forecast through Saturday night. Below
normal temperatures are expected through Saturday night as well.

On Sunday, active weather could once again return to the
forecast. An area of low pressure is forecast to move across
southeast Canada and bring a frontal boundary/surface trough
across the east coast Sunday into Sunday night. Meanwhile, an
area o flow pressure may form along the frontal boundary to our
south and move to the northeast offshore of the Mid Atlantic
coast. There will be a chance of showers and thunderstorms
through the day Sunday, most likely associated with the
approaching frontal boundary coming from the west. The low off
the coast may remain far enough offshore to not bring any
impacts to the area.

On Monday, our area will be in between the departing system
from the weekend, and another potential coastal low that is
expected Tuesday. Therefore dry weather is expected on Monday.

However, on Tuesday, another coastal low is forecast to develop
to our south and may end up inching close enough to the coast
to bring a chance of showers and thunderstorms to the area.

As we go through the second half of the week, unsettled weather
is possible to continue for Wednesday and Thursday as the front
to the south may begin moving back northward and into the area
while a couple of low pressure systems may develop and move near
the area as well.

Temperatures for the long term period are expected to be near
or slightly below normal for the weekend into much of next week.

&&

.AVIATION /01Z FRIDAY THROUGH TUESDAY/...
The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG, KILG,
KMIV, KACY and surrounding areas.

Tonight...Showers and thunderstorms will move the terminals
from west to east this afternoon, ending between 22Z-03Z.
Conditions will drop to MVFR/IFR in and around any storms. Winds
may gust in excess of 30 knots in and near thunderstorms.
Conditions are expected to be MVFR for a period of time behind
the storms before returning to VFR by late tonight. South to
southwest winds around 10 to 15 knots, becoming northwest around
5 to 10 knots overnight. Moderate confidence overall with low
confidence in thunderstorm timing.

Friday...Mainly VFR. Northwest winds around 10 to 15 knots with
gusts up to 25 knots possible in the afternoon. High
confidence.

Outlook...

Saturday-Saturday night...VFR. Northwest winds 5-10 mph during
the day, light and variable overnight.

Sunday...Mostly VFR. Chance of showers and thunderstorms which
may temporarily lead to lower conditions. Southwest winds 5-10
knots, gusts 15-20 knots possible.

Sunday night...Chance for conditions to lower below VFR
overnight. South winds early, becoming northwest overnight.

Monday-Monday night...Mostly VFR expected. Northwest winds 5-10
knots during the day, light and variable overnight.

Tuesday-Tuesday night...Mostly VFR. Chance of showers and
thunderstorms which may temporarily lead to lower conditions.
Northwest winds 5-10 knots during the day, light and variable
overnight.

&&

.MARINE...
SCA remain up for the ocean waters through midnight tonight.

Winds will gusts around 25 knots on the ocean in response to a
tightening pressure gradient. Winds will start to drop off
tonight. Seas around 3 to 4 feet.

Mainly sub-SCA conditions are expected for Friday. Northwest
winds around 10 to 15 knots with gusts around 20 knots. Seas
will remain around 3 to 4 feet. A few gusts may near 25 knots
late afternoon into Friday night in the strong northwest flow,
especially in the coastal waters off of northern and central New
Jersey. However, will hold off on issuing any new SCA's at this
time until the current SCA has expired.

Outlook...

Saturday-Tuesday...Conditions are expected to remain below Small
Craft Advisory levels through the period.

Rip Currents...

Winds will increase to 15 to 20 kts today with gusts at SCA
criteria. There will be an onshore component for the NJ coast
today as winds veer from the south. Given the above, and the 8
second period forecast, the rip risk for Coastal Cape May and
Coastal Atlantic will be MODERATE today. The rest of the beaches
will be kept at LOW given the orientation of the coastline
relative to the wind direction. Winds shift offshore for Friday,
so the rip risk for Friday will be LOW.

&&

.PHI WATCHES/WARNINGS/ADVISORIES...
PA...None.
NJ...None.
DE...None.
MD...None.
MARINE...Small Craft Advisory until midnight EDT tonight for ANZ450>455.

&&

Synopsis...Robertson
Near Term...Johnson/Meola
Short Term...Meola
Long Term...Robertson
Aviation...Meola/Robertson
Marine...Meola
Hazardous weather outlook, Jul 29, 5:05 PM EDT, 3 hours 58 minutes before
Hazardous Weather Outlook
National Weather Service Mount Holly NJ
0505 PM EDT Thu Jul 29 2021

DEZ001-302105-
New Castle-
0505 PM EDT Thu Jul 29 2021

This Hazardous Weather Outlook is for New Castle County in Delaware.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

DEZ002-302105-
Kent-
0505 PM EDT Thu Jul 29 2021

This Hazardous Weather Outlook is for Kent County in Delaware.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

DEZ003-302105-
Inland Sussex-
0505 PM EDT Thu Jul 29 2021

This Hazardous Weather Outlook is for inland portions of Sussex County
in Delaware.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

DEZ004-302105-
Delaware Beaches-
0505 PM EDT Thu Jul 29 2021

This Hazardous Weather Outlook is for the Atlantic coastal portions of
Sussex County in Delaware.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

PAZ054-302105-
Carbon-
0505 PM EDT Thu Jul 29 2021

This Hazardous Weather Outlook is for Carbon County in Pennsylvania.

.DAY ONE...Through tonight.

Several instances of flooding are possible, especially in urban and
poor-drainage areas and near vulnerable small creeks and streams.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

PAZ055-302105-
Monroe-
0505 PM EDT Thu Jul 29 2021

This Hazardous Weather Outlook is for Monroe County in Pennsylvania.

.DAY ONE...Through tonight.

Several instances of flooding are possible, especially in urban and
poor-drainage areas and near vulnerable small creeks and streams.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

PAZ060-302105-
Berks-
0505 PM EDT Thu Jul 29 2021

This Hazardous Weather Outlook is for Berks County in Pennsylvania.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

PAZ061-302105-
Lehigh-
0505 PM EDT Thu Jul 29 2021

This Hazardous Weather Outlook is for Lehigh County in Pennsylvania.

.DAY ONE...Through tonight.

Several instances of flooding are possible, especially in urban and
poor-drainage areas and near vulnerable small creeks and streams.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

PAZ062-302105-
Northampton-
0505 PM EDT Thu Jul 29 2021

This Hazardous Weather Outlook is for Northampton County in
Pennsylvania.

.DAY ONE...Through tonight.

Several instances of flooding are possible, especially in urban and
poor-drainage areas and near vulnerable small creeks and streams.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

PAZ070-302105-
Delaware-
0505 PM EDT Thu Jul 29 2021

This Hazardous Weather Outlook is for Delaware County in Pennsylvania.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

PAZ071-302105-
Philadelphia-
0505 PM EDT Thu Jul 29 2021

This Hazardous Weather Outlook is for Philadelphia County in
Pennsylvania.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

PAZ101-302105-
Western Chester-
0505 PM EDT Thu Jul 29 2021

This Hazardous Weather Outlook is for western Chester County in
Pennsylvania.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

PAZ102-302105-
Eastern Chester-
0505 PM EDT Thu Jul 29 2021

This Hazardous Weather Outlook is for eastern Chester County in
Pennsylvania.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

PAZ103-302105-
Western Montgomery-
0505 PM EDT Thu Jul 29 2021

This Hazardous Weather Outlook is for western Montgomery County in
Pennsylvania.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

PAZ104-302105-
Eastern Montgomery-
0505 PM EDT Thu Jul 29 2021

This Hazardous Weather Outlook is for eastern Montgomery County in
Pennsylvania.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

PAZ105-302105-
Upper Bucks-
0505 PM EDT Thu Jul 29 2021

This Hazardous Weather Outlook is for upper Bucks County in
Pennsylvania.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

PAZ106-302105-
Lower Bucks-
0505 PM EDT Thu Jul 29 2021

This Hazardous Weather Outlook is for lower Bucks County in
Pennsylvania.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

NJZ001-302105-
Sussex-
0505 PM EDT Thu Jul 29 2021

This Hazardous Weather Outlook is for Sussex County in New Jersey.

.DAY ONE...Through tonight.

Several instances of flooding are possible, especially in urban and
poor-drainage areas and near vulnerable small creeks and streams.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

NJZ007-302105-
Warren-
0505 PM EDT Thu Jul 29 2021

This Hazardous Weather Outlook is for Warren County in New Jersey.

.DAY ONE...Through tonight.

Several instances of flooding are possible, especially in urban and
poor-drainage areas and near vulnerable small creeks and streams.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

NJZ008-302105-
Morris-
0505 PM EDT Thu Jul 29 2021

This Hazardous Weather Outlook is for Morris County in New Jersey.

.DAY ONE...Through tonight.

Several instances of flooding are possible, especially in urban and
poor-drainage areas and near vulnerable small creeks and streams.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

NJZ009-302105-
Hunterdon-
0505 PM EDT Thu Jul 29 2021

This Hazardous Weather Outlook is for Hunterdon County in New Jersey.

.DAY ONE...Through tonight.

Several instances of flooding are possible, especially in urban and
poor-drainage areas and near vulnerable small creeks and streams.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

NJZ010-302105-
Somerset-
0505 PM EDT Thu Jul 29 2021

This Hazardous Weather Outlook is for Somerset County in New Jersey.

.DAY ONE...Through tonight.

Several instances of flooding are possible, especially in urban and
poor-drainage areas and near vulnerable small creeks and streams.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

NJZ012-302105-
Middlesex-
0505 PM EDT Thu Jul 29 2021

This Hazardous Weather Outlook is for Middlesex County in New Jersey.

.DAY ONE...Through tonight.

Several instances of flooding are possible, especially in urban and
poor-drainage areas and near vulnerable small creeks and streams.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

NJZ013-302105-
Western Monmouth-
0505 PM EDT Thu Jul 29 2021

This Hazardous Weather Outlook is for western Monmouth County in New
Jersey.

.DAY ONE...Through tonight.

Several instances of flooding are possible, especially in urban and
poor-drainage areas and near vulnerable small creeks and streams.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

NJZ014-302105-
Eastern Monmouth-
0505 PM EDT Thu Jul 29 2021

This Hazardous Weather Outlook is for eastern Monmouth County in New
Jersey.

.DAY ONE...Through tonight.

Several instances of flooding are possible, especially in urban and
poor-drainage areas and near vulnerable small creeks and streams.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

NJZ015-302105-
Mercer-
0505 PM EDT Thu Jul 29 2021

This Hazardous Weather Outlook is for Mercer County in New Jersey.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

NJZ016-302105-
Salem-
0505 PM EDT Thu Jul 29 2021

This Hazardous Weather Outlook is for Salem County in New Jersey.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

NJZ017-302105-
Gloucester-
0505 PM EDT Thu Jul 29 2021

This Hazardous Weather Outlook is for Gloucester County in New Jersey.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

NJZ018-302105-
Camden-
0505 PM EDT Thu Jul 29 2021

This Hazardous Weather Outlook is for Camden County in New Jersey.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

NJZ019-302105-
Northwestern Burlington-
0505 PM EDT Thu Jul 29 2021

This Hazardous Weather Outlook is for northwestern Burlington County in
New Jersey.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

NJZ020-302105-
Ocean-
0505 PM EDT Thu Jul 29 2021

This Hazardous Weather Outlook is for inland portions of Ocean County
in New Jersey.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

NJZ021-302105-
Cumberland-
0505 PM EDT Thu Jul 29 2021

This Hazardous Weather Outlook is for Cumberland County in New Jersey.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

NJZ022-302105-
Atlantic-
0505 PM EDT Thu Jul 29 2021

This Hazardous Weather Outlook is for inland portions of Atlantic
County in New Jersey.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

NJZ023-302105-
Cape May-
0505 PM EDT Thu Jul 29 2021

This Hazardous Weather Outlook is for Cape May County excluding the
Atlantic coast in New Jersey.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

NJZ024-302105-
Atlantic Coastal Cape May-
0505 PM EDT Thu Jul 29 2021

This Hazardous Weather Outlook is for the Atlantic coastal portions of
Cape May County in New Jersey.

.DAY ONE...Through tonight.

There is a moderate risk of rip currents.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

NJZ025-302105-
Coastal Atlantic-
0505 PM EDT Thu Jul 29 2021

This Hazardous Weather Outlook is for coastal portions of Atlantic
County in New Jersey.

.DAY ONE...Through tonight.

There is a moderate risk of rip currents.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

NJZ026-302105-
Coastal Ocean-
0505 PM EDT Thu Jul 29 2021

This Hazardous Weather Outlook is for coastal portions of Ocean County
in New Jersey.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

NJZ027-302105-
Southeastern Burlington-
0505 PM EDT Thu Jul 29 2021

This Hazardous Weather Outlook is for southeastern Burlington County in
New Jersey.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

MDZ012-302105-
Kent MD-
0505 PM EDT Thu Jul 29 2021

This Hazardous Weather Outlook is for Kent County in Maryland.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

MDZ015-302105-
Queen Annes-
0505 PM EDT Thu Jul 29 2021

This Hazardous Weather Outlook is for Queen Annes County in Maryland.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

MDZ019-302105-
Talbot-
0505 PM EDT Thu Jul 29 2021

This Hazardous Weather Outlook is for Talbot County in Maryland.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

MDZ020-302105-
Caroline-
0505 PM EDT Thu Jul 29 2021

This Hazardous Weather Outlook is for Caroline County in Maryland.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

ANZ430-302105-
Delaware Bay waters north of East Point NJ to Slaughter Beach DE-
0505 PM EDT Thu Jul 29 2021

This Hazardous Weather Outlook is for upper Delaware Bay.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

ANZ431-302105-
Delaware Bay waters south of East Point NJ to Slaughter Beach DE-
0505 PM EDT Thu Jul 29 2021

This Hazardous Weather Outlook is for lower Delaware Bay.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

ANZ450-302105-
Coastal waters from Sandy Hook to Manasquan Inlet NJ out 20 nm-
0505 PM EDT Thu Jul 29 2021

This Hazardous Weather Outlook is for the Atlantic coastal waters
adjacent to Monmouth County out 20 nm.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

ANZ451-302105-
Coastal waters from Manasquan Inlet to Little Egg Inlet NJ out 20 nm-
0505 PM EDT Thu Jul 29 2021

This Hazardous Weather Outlook is for the Atlantic coastal waters
adjacent to Ocean County out 20 nm.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

ANZ452-302105-
Coastal waters from Little Egg Inlet to Great Egg Inlet NJ out 20 nm-
0505 PM EDT Thu Jul 29 2021

This Hazardous Weather Outlook is for the Atlantic coastal waters
adjacent to Atlantic County out 20 nm.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

ANZ453-302105-
Coastal waters from Great Egg Inlet to Cape May NJ out 20 nm-
0505 PM EDT Thu Jul 29 2021

This Hazardous Weather Outlook is for the Atlantic coastal waters
adjacent to Cape May County out 20 nm.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

ANZ454-302105-
Coastal waters from Cape May NJ to Cape Henlopen DE out 20 nm-
0505 PM EDT Thu Jul 29 2021

This Hazardous Weather Outlook is for the Atlantic coastal waters
adjacent to the mouth of Delaware Bay out 20 nm.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

ANZ455-302105-
Coastal waters from Cape Henlopen to Fenwick Island DE out 20 nm-
0505 PM EDT Thu Jul 29 2021

This Hazardous Weather Outlook is for the Atlantic coastal waters
adjacent to Sussex County out 20 nm.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

In the hours before

Local storm report, Jul 29, 8:17 PM EDT, 46 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
817 PM EDT THU JUL 29 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0817 PM     HEAVY RAIN       2 WSW EAST WINDSOR TWP  40.27N 74.57W
07/29/2021  M4.42 INCH       MERCER             NJ   CO-OP OBSERVER

&&
Local storm report, Jul 29, 8:21 PM EDT, 42 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
821 PM EDT THU JUL 29 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0808 PM     FLASH FLOOD      HIGHTSTOWN              40.28N 74.52W
07/29/2021                   MERCER             NJ   PUBLIC

            SOCIAL MEDIA VIDEO OF ROADS FLOODED. WATER
            UP TO CAR TIRES.

&&

MPS
Local storm report, Jul 29, 8:27 PM EDT, 36 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
827 PM EDT THU JUL 29 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0812 PM     HEAVY RAIN       3 ESE FREEHOLD TWP      40.21N 74.25W
07/29/2021  M1.62 INCH       MONMOUTH           NJ   COCORAHS

            1.54 INCHES IN 32 MINUTES.

&&

MPS
Local storm report, Jul 29, 8:43 PM EDT, 20 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
843 PM EDT THU JUL 29 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0500 PM     TSTM WND DMG     2 S HELLERTOWN          40.55N 75.34W
07/29/2021                   NORTHAMPTON        PA   BROADCAST MEDIA

            THREE BUILDINGS DAMAGED NEAR THE
            INTERSECTION OF LEITHSVILLE ROAD AND WEAVERS
            LANE.

&&
Local storm report, Jul 29, 8:48 PM EDT, 15 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
848 PM EDT THU JUL 29 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0719 PM     HAIL             WILLINGBORO             40.03N 74.89W
07/29/2021  M1.50 INCH       BURLINGTON         NJ   PUBLIC

            PICTURE SHARED ON SOCIAL MEDIA OF 1.5 INCH
            HAIL IN WILLINGBORO. TIME ESTIMATED FROM
            RADAR.

&&

SFJ
Local storm report, Jul 29, 8:57 PM EDT, 6 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
857 PM EDT THU JUL 29 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0720 PM     FLASH FLOOD      EAST WINDSOR TWP        40.27N 74.54W
07/29/2021                   MERCER             NJ   DEPT OF HIGHWAYS

            US ROUTE 130 NORTHBOUND CLOSED NEAR
            PRINCETON HIGHTSTOWN ROAD.

&&

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.

Brookhaven, NY (KOKX), 00:00Z

1.1 hours before the tornado, 165 km from the path. July 30, 2021.

Skew-T log-pSkew-T log-p diagram, Brookhaven, NY at 00:00Z on 2021-07-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 635 joules per kilogram, CIN -2, lifted condensation level 502 meters above ground. Wind barbs in knots down the right edge.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°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, Brookhaven, NY at 00:00Z on 2021-07-30The 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 381 square meters per square second, 0 to 6 km bulk shear 52 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
635 J/kg
Mixed-layer CIN
-2 J/kg
Surface CAPE
491 J/kg
Mixed-layer LCL
502 m above ground
0-6 km bulk shear
52 kt
0-1 km bulk shear
34 kt
0-1 km storm-relative helicity
381 m²/s²
0-3 km storm-relative helicity
515 m²/s²
Significant tornado parameter
1.3
Supercell composite
5.0
0-3 km lapse rate
5.6 K/km

Open this sounding in Storm Lab

Brookhaven, NY (KOKX), 12:00Z

10.9 hours after it, 165 km from the path. July 30, 2021.

Skew-T log-pSkew-T log-p diagram, Brookhaven, NY at 12:00Z on 2021-07-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 0 joules per kilogram, CIN -181, lifted condensation level 930 meters above ground. Wind barbs in knots down the right edge.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°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, Brookhaven, NY at 12:00Z on 2021-07-30The 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 -53 square meters per square second, 0 to 6 km bulk shear 57 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
0 J/kg
Mixed-layer CIN
-181 J/kg
Surface CAPE
542 J/kg
Mixed-layer LCL
930 m above ground
0-6 km bulk shear
57 kt
0-1 km bulk shear
20 kt
0-1 km storm-relative helicity
-53 m²/s²
0-3 km storm-relative helicity
19 m²/s²
Significant tornado parameter
-0.0
Supercell composite
-0.6
0-3 km lapse rate
5.5 K/km

Open this sounding in Storm Lab

The radar

The Philadelphia radar (KDIX), 31 km away, was scanning. The volume nearest the touchdown began at 01:04 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
23:27 UTCHAIL 1.5HainesportBurlington, NJMEASURED 1.5 INCH HAIL.
23:31 UTCHAIL 1.251 Nw Mount HollyBurlington, NJPICTURE OF HAIL NEAR MOUNT HOLLY, NJ. TIME ESTIMATED FROM RADAR.
23:35 UTCTSTM WND DMG1 Sse Mount Holly WfoBurlington, NJLARGE TREE UPROOTED.
00:00 UTCFLASH FLOOD1 Wnw West FreeholdMonmouth, NJNJ ROUTE 33 IN FREEHOLD TOWNSHIP WAS CLOSED DUE TO FLOODING.
00:04 UTCTORNADO6 Ese New EgyptOcean, NJTHE TORNADO TOUCHED DOWN EAST OF HAWKIN ROAD NEAR THE INTERSECTION OF BORDENS MILL BRANCH AND SUCCESS BRANCH IN JACKSON TOWNSHIP. THE ENTIRE LIFE CYCLE OF THIS TORNADO WAS WITHIN A LARGE WOODED AREA BETWEEN SUCCESS LAKE
00:12 UTCHEAVY RAIN 1.623 Ese Freehold TwpMonmouth, NJ1.54 INCHES IN 32 MINUTES.
00:30 UTCTSTM WND DMG2 Se Leisure Village EaOcean, NJSEVERAL TREES DOWN IN THE SILVERTON AREA OF TOMS RIVER. TIME ESTIMATED FROM RADAR.
00:42 UTCTORNADO2 Nw Warren GroveBurlington, NJA TORNADO TOUCHED DOWN ON THE EVENING OF JULY 29 IN A HEAVILY FORESTED AREA IN THE EASTERN PORTION OF WOODLAND TWP IN SOUTHERN NEW JERSEY. THE START LOCATION IS ESTIMATED TO BE BETWEEN STEVENSON RD, WHERE SURVEY CREWS FO
00:43 UTCTSTM WND DMG2 Sse Leisure Village EOcean, NJA DAMAGING WIND EVENT OCCURRED IN THE SILVERTON SECTION OF TOMS RIVER, NEW JERSEY. THE AREA WAS SURVEYED BY A NATIONAL WEATHER SERVICE STORM SURVEY TEAM. MULTIPLE AREAS OF MINOR TREE AND SIDING DAMAGE WERE OBSERVED ROUGH
00:45 UTCFLASH FLOOD1 Sw WanamassaMonmouth, NJNJ ROUTE 35 CLOSED AT NJ ROUTE 66 IN NEPTUNE TOWNSHIP.
00:45 UTCFLASH FLOODManasquanMonmouth, NJNJ ROUTE 71 CLOSED DUE TO FLOODING NEAR MAIN STREET.
00:50 UTCFLASH FLOOD1 Wnw Lake ComoMonmouth, NJNJ ROUTE 35 CLOSED AT BELMAR BOULEVARD IN BELMAR.
01:00 UTCTSTM WND DMG2 Ne Warren GroveOcean, NJDOWNED UTILITY POLE AND WIRES BLOCKING NJ ROUTE 72 EASTBOUND NEAR WARREN GROVE ROAD IN BARNEGAT TOWNSHIP.
01:00 UTCTSTM WND DMG2 N Warren GroveOcean, NJUTILITY POLE AND WIRES DOWN BLOCKING NJ ROUTE 72 NEAR WHITING ROAD IN BARNEGAT TOWNSHIP.
01:12 UTCTSTM WND DMG1 Wsw Barnegat LightOcean, NJWIDESPREAD WIND DAMAGE IN HIGH BAR HARBOR. A ROOF WAS TORN OFF A BUILDING, BOATS WERE OVERTURNED, UTILITY POLES WERE TOPPLED AND THERE WAS MUCH DEBRIS ON LOCAL ROADWAYS. A POSSIBLE TORNADO.

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

This ground now

The live radar over the trackEvery 2021 tornado in New JerseyEvery tornado in New Jersey since 1950Warnings in force in New Jersey nowThe forecast where you are

The other tornadoes of July 29, 2021

36 more were confirmed in the United States that day.

DateTimeRatingWherePath (mi)Width (yd)DeathsInjuriesDamage
July 291:05 AM CDTEF0Jefferson, WI6.0100
July 291:07 AM CDTEF0Jefferson, WI3.625
July 291:07 AM CDTEF1Jefferson, WI7.7200
July 291:23 AM CDTEF1Jefferson, WI4.7150
July 291:26 AM CDTEF1Waukesha, WI1.075
July 291:32 AM CDTEF0Waukesha, WI2.450
July 291:38 AM CDTEF1Waukesha, WI0.995
July 2912:40 PM EDTEF0Crawford, PA0.675
July 2912:55 PM EDTEF0Venango, PA0.315$15,000
July 291:54 PM EDTEF1Westmoreland, PA4.9100$275,000
July 292:25 PM EDTEF1Somerset, PA0.265
July 294:04 PM EDTEF1Lehigh, PA2.990
July 294:25 PM EDTEF1Lehigh, PA1.175
July 294:50 PM EDTEF2Harrison, OH2.7220$200,000
July 294:59 PM EDTEF2Carroll, OH6.2150$500,000
July 295:07 PM EDTEF0Howard, MD0.350$50,000
July 295:15 PM EDTEF1Jefferson, OH2.2300$250,000
July 295:16 PM EDTEF0Washington, OH0.155$500
July 295:20 PM EDTEF0Indiana, PA0.110$50,000
July 295:20 PM EDTEF0Pickaway, OH0.950$100,000
July 295:34 PM EDTEF0Lebanon, PA0.760
July 295:40 PM EDTEF1Bucks, PA2.770
July 295:45 PM EDTEF1Jefferson, OH2.3300$250,000
July 295:54 PM EDTEF0Essex, NJ0.350$330,000
July 294:59 PM CDTEF2Bucks, PA to NJ6.3400
July 296:00 PM EDTEF1Greene, PA2.8200$100,000
July 296:10 PM EDTEF0Cambria, PA0.115
July 295:40 PM CDTEF0Cumberland, IL0.550
July 296:56 PM EDTEF1Mercer, NJ1.6100
July 297:04 PM EDTEF3Bensalem tornado, PA3.4530
July 297:07 PM EDTEF0Philadelphia, PA0.440
July 297:58 PM EDTEF1Shelby, IN2.550$43,000
July 298:04 PM EDTEF0Ocean, NJ0.880
July 298:14 PM EDTEF1Shelby, IN0.750$15,000
July 297:20 PM CDTEF1Crawford, IL0.475
July 298:42 PM EDTEF1Ocean, NJ6.5250

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.