Tornadoes and Flash Flood in New Jersey, June 24, 2017

Name: Tornadoes and Flash Flood in New Jersey, June 24, 2017
Start: 2017-06-24T05:15
End: 2017-06-24T08:58
Location: New Jersey

June 24, 2017 · NWS PHI · 24 events in 10 counties and zones

A band of gusty convective showers moved through during the morning hours in association with the remnants of tropical storm Cindy. Several reports of damage were reported from the winds.

Where it happened

Every event with a place to put it. Tap one for its entry below.

Tornadoes
Tropical storms and surge
Floods
Wind
Hail
Winter weather
Heat and drought
Cold
Fire, smoke and dust
Marine and coastal
Other

Open the live radar over this ground

The toll

Deaths: 0
Injuries: 0
Property damage: None recorded
Crop damage: None recorded
Events: 24

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What happened

The episode as NWS PHI wrote it up.

A band of gusty convective showers moved through during the morning hours in association with the remnants of tropical storm Cindy. Several reports of damage were reported from the winds. Thousands lost power.

What forecasters said that day

The local office's own words before the first event, 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 first event at Jun 24, 2:18 AM EST, 2 hours 57 minutes earlier.

Area forecast discussion, Jun 24, 2:18 AM EST, 2 hours 57 minutes before

Area Forecast Discussion
National Weather Service Mount Holly NJ
318 AM EDT Sat Jun 24 2017

.SYNOPSIS...
Tropical low pressure just west of the Appalachians will lift
to the northeast through the Mid-Atlantic and Northeast this
morning, and then a cold front will move across the region this
afternoon. Surface high pressure builds into the Midwest as an
upper trough digs into the eastern Great Lakes and Northeast
tonight through Sunday. A weak cold front is expected to move
through the region Monday night through Tuesday. High pressure
returns to the area for the middle of next week before moving
off the coast late in the week as low pressure passes north of
the region.

&&

.NEAR TERM /UNTIL 6 PM THIS EVENING/...
Much of the weather action will begin shortly after AFD release
with a decent batch of showers and scattered thunder associated
with a front and the remnant moisture from TS Cindy moving
across the area. The warm and tropical airmass in place will
create decent rainfall rates this morning with some 1-2 inch
totals expected thru mid- morning. Once the front crosses the
area, winds will shift to NW and rapid improvement from NW to SE
will progress thru the area. Sunny skies will be across the
region by this afternoon. It will remain very warm, but the
airmass will become drier as the day progresses. Highs will
reach the mid-upper 80s in most areas today. Winds will gust to
20-25 mph for much of the day.

&&

.SHORT TERM /6 PM THIS EVENING THROUGH 6 PM SUNDAY/...
High pressure well to the west will begin to ridge across the
area tonight. Fair weather with mostly clear skies are expected.
Low temperatures will remain in the mid 60s to around 70 in
most areas. The airmass will be much more comfortable tonight
than in recent nights.

&&

.LONG TERM /SUNDAY NIGHT THROUGH FRIDAY/...
Surface high pressure builds into the Midwest and western Great
Lakes Sunday morning. Dry conditions with low humidity on tap
for most of the region, and downsloping westerly flow will push
temperatures into the mid and upper 80s across the Delmarva,
southeast PA, and much of NJ, and in the low to mid 80s for the
Lehigh Valley, Poconos, and northwest NJ. Surface dewpoints will
generally be in the 50s. With an upper trough digging through
the eastern Great Lakes and Northeast, some shortwave energy
will pass through the base of the trough, and could touch off
some isolated showers and thunderstorms in the afternoon, mainly
over the Poconos.

Conditions dry out Sunday night. Cool and dry with lows in the
50s to low 60s.

Surface high pressure continues to build into the OH/TN Valleys
on Monday as H5 low moves into Great Lakes and upper trough
becomes entrenched over the Great Lakes, Northeast, and into the
Mid- Atlantic. With shortwave energy rotating around the base
of the trough, some isolated to scattered showers and
thunderstorms are possible, and then coverage becomes slightly
more widespread on Tuesday as the base of the trough and a
surface cold front passes through the region and moves offshore.
Surface high pressure continues to slowly build east through
Wednesday, and then the center of the high moves off the Mid-
Atlantic coast by Wednesday night.

For Monday through Wednesday, temperatures will be on the cool
and dry side, with highs generally in the upper 70s to low 80s
to start the week, and then in the low to mid 70s for the mid-
week period. Dewpoints will be in the 50s. Overnight lows will
be in the 50s to low 60s.

With high pressure now off the Mid-Atlantic coast, return flow
sets up, and temperatures return back into the mid 80s, and
surface dewpoints creep back up into the low to mid 60s.

By Friday, low pressure moves into the Great Lakes, and some
mid-level shortwave energy spins off ahead of the low, and may
touch off some scattered showers and thunderstorms. Temperatures
once again rise into the upper 80s to around 90, along with
dewpoints in the mid to upper 60s.

&&

.AVIATION /07Z SATURDAY THROUGH WEDNESDAY/...
The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG,
KILG, KMIV, KACY and surrounding areas.

A period of poor flying weather thru the mid-morning before a
return back to VFR across the region. Prior to the mid-morning,
showers and isolated thunder with lower CIGS and VSBYS expected
across most areas with the remnants of Cindy and a front
affecting the weather. S to SW winds ahead of the system will
swing abruptly to NW around dawn and gust around 20-25 kts at
times. Later today, clearing and NW winds backing to W late.
Tonight...VFR, clear skies and light winds expected.

OUTLOOK...

Sunday...VFR. West winds 8-12 KT. Gusts to 19 KT possible in
the afternoon.

Sunday night...VFR. Light NW winds.

Monday...VFR. West to southwest winds 5-10 KT. Isolated
SHRA/TSRA possible in the afternoon, mainly north/west of the
I-95 corridor terminals.

Monday night...VFR. Light west winds.

Tuesday...Mainly VFR. Sub-VFR conditions possible in scattered
SHRA/TSRA in the afternoon.

Tuesday night through Wednesday...VFR.

&&

.MARINE...
We will add the SCA flag for Delaware Bay with frequent gusts to 25
knt attm which will likely continue until after the low/front cross
the area this morning. The SCA for the ocean will remain for the day
with seas expected to remain above 5 ft thru the period. Rains and
psbl thunder this morning, then rapid improvement by early
afternoon. Fair weather expected tonight.

OUTLOOK...

Sunday through Wednesday...Winds and seas are expected to remain
below SCA criteria. Scattered thunderstorms possible on Tuesday.

RIP CURRENTS...
Today, winds will be shifting off shore, but a 5 to 6 ft swell
may lead to a moderate risk for the formation of dangerous rip
currents especially along the central and southern NJ shore. For
the northern NJ shore and the Delaware beaches, the risk is
expected to be low at this time. However, even with a low
risk...the bigger diurnal difference in the tide cycle due to
the new moon today could mean some rapidly changing conditions.

&&

.PHI WATCHES/WARNINGS/ADVISORIES...
PA...None.
NJ...None.
DE...None.
MD...None.
MARINE...Small Craft Advisory until 6 PM EDT this evening for
     ANZ450>455.
     Small Craft Advisory until noon EDT today for ANZ430-431.

&&

Synopsis...MPS
Near Term...O'Hara
Short Term...O'Hara
Long Term...MPS
Aviation...MPS/O'Hara
Marine...MPS/O'Hara
Tides/Coastal Flooding...

Hazardous weather outlook, Jun 24, 2:13 AM EST, 3 hours 2 minutes before

Hazardous Weather Outlook
National Weather Service Mount Holly NJ
313 AM EDT Sat Jun 24 2017

NJZ001-007>010-012-015-PAZ054-055-060>062-070-071-101>106-251000-
Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex-Mercer-Carbon-
Monroe-Berks-Lehigh-Northampton-Delaware-Philadelphia-
Western Chester-Eastern Chester-Western Montgomery-
Eastern Montgomery-Upper Bucks-Lower Bucks-
313 AM EDT Sat Jun 24 2017

This Hazardous Weather Outlook is for central New Jersey, northern
New Jersey, northwest New Jersey, east central Pennsylvania,
northeast Pennsylvania and southeast Pennsylvania.

.DAY ONE...Today and Tonight.

Locally heavy rainfall could result in poor drainage flooding this
morning.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed this morning for flood reports.

NJZ013-016>023-027-251000-
Western Monmouth-Salem-Gloucester-Camden-Northwestern Burlington-
Ocean-Cumberland-Atlantic-Cape May-Southeastern Burlington-
313 AM EDT Sat Jun 24 2017

This Hazardous Weather Outlook is for central New Jersey and
southern New Jersey.

.DAY ONE...Today and Tonight.

Locally heavy rainfall could result in poor drainage flooding this
morning.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed for flood reports this morning.

DEZ004-NJZ014-251000-
Delaware Beaches-Eastern Monmouth-
313 AM EDT Sat Jun 24 2017

This Hazardous Weather Outlook is for southern Delaware and central
New Jersey.

.DAY ONE...Today and Tonight.

Locally heavy rainfall could result in poor drainage flooding this
morning.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed for flood reports this morning.

NJZ024>026-251000-
Atlantic Coastal Cape May-Coastal Atlantic-Coastal Ocean-
313 AM EDT Sat Jun 24 2017

This Hazardous Weather Outlook is for southern New Jersey.

.DAY ONE...Today and Tonight.

Locally heavy rainfall could result in poor drainage flooding this
morning.

There is a moderate risk for the development of dangerous rip
currents today.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed for flood reports this morning.

DEZ001>003-MDZ008-012-015-019-020-251000-
New Castle-Kent-Inland Sussex-Cecil-Kent MD-Queen Annes-Talbot-
Caroline-
313 AM EDT Sat Jun 24 2017

This Hazardous Weather Outlook is for central Delaware, northern
Delaware, southern Delaware and northeast Maryland.

.DAY ONE...Today and Tonight.

Locally heavy rainfall could result in poor drainage flooding this
morning.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed for flood reports this morning.

ANZ430-431-450>455-251000-
Delaware Bay waters north of East Point NJ to Slaughter Beach DE-
Delaware Bay waters south of East Point NJ to Slaughter Beach DE-
Coastal waters from Sandy Hook to Manasquan Inlet NJ out 20 nm-
Coastal waters from Manasquan Inlet to Little Egg Inlet NJ out 20 nm-
Coastal waters from Little Egg Inlet to Great Egg Inlet NJ out 20 nm-
Coastal waters from Great Egg Inlet to Cape May NJ out 20 nm-
Coastal waters from Cape May NJ to Cape Henlopen DE out 20 nm-
Coastal waters from Cape Henlopen to Fenwick Island DE out 20 nm-
313 AM EDT Sat Jun 24 2017

This Hazardous Weather Outlook is for Atlantic coastal waters and
Delaware Bay Waters.

.DAY ONE...Today and Tonight.

Gusty showers and isolated thunderstorms tonight will be capable of
producing locally strong winds to 30 kt.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

MPS

The radar

The Philadelphia radar (KDIX), 53 km away, was scanning. The volume nearest the first event began at 10:15 UTC.

Open the radar archive at this moment

Event by event

14 thunderstorm wind, 4 flood, 2 tornado, 2 heavy rain, 1 funnel cloud, 1 flash flood. Local standard time, as filed.

Thunderstorm Wind, Mercer

When: June 24, 5:15 AM EST
Where: Mercer County, 0.53 mi W of Pennington
Measured: 52 kt (60 mph) estimated gust
Reported by: State Official
Coordinates: 40.330, -74.790

Wires were reported down.

Thunderstorm Wind, Gloucester

When: June 24, 5:19 AM EST
Where: Gloucester County, 1.74 mi WSW of Clarksboro
Measured: 52 kt (60 mph) estimated gust
Reported by: State Official
Coordinates: 39.790, -75.250

Trees and wires were reported down.

Thunderstorm Wind, Camden

When: June 24, 5:23 AM EST
Where: Camden County, 0.69 mi N of Brooklawn
Measured: 52 kt (60 mph) estimated gust
Reported by: Trained Spotter
Coordinates: 39.890, -75.120

Trees were blown down including one into a home.

Thunderstorm Wind, Gloucester

When: June 24, 5:27 AM EST
Where: Gloucester County, 1.06 mi W of New Sharon
Measured: 52 kt (60 mph) estimated gust
Reported by: State Official
Coordinates: 39.820, -75.120

Trees and wires were reported down.

Thunderstorm Wind, Gloucester

When: June 24, 5:28 AM EST
Where: Gloucester County, 0.69 mi N of Wenonah
Measured: 52 kt (60 mph) estimated gust
Reported by: State Official
Coordinates: 39.790, -75.150

Trees and wires were reported down.

Thunderstorm Wind, Camden

When: June 24, 5:29 AM EST
Where: Camden County, Collingswood
Measured: 52 kt (60 mph) estimated gust
Reported by: State Official
Coordinates: 39.920, -75.080

Wires were reported down.

Thunderstorm Wind, Camden

When: June 24, 5:41 AM EST
Where: Camden County, 0.87 mi SE of Clementon
Measured: 52 kt (60 mph) estimated gust
Reported by: Trained Spotter
Coordinates: 39.790, -74.990

Two large trees were reported down.

Thunderstorm Wind, Mercer

When: June 24, 5:45 AM EST
Where: Mercer County, East Windsor
Measured: 52 kt (60 mph) estimated gust
Reported by: State Official
Coordinates: 40.270, -74.530

Wires were reported down.

Thunderstorm Wind, Burlington

When: June 24, 5:51 AM EST
Where: Burlington County, Medford
Measured: 52 kt (60 mph) estimated gust
Reported by: State Official
Coordinates: 39.900, -74.820

Trees and wires were reported down.

Thunderstorm Wind, Burlington

When: June 24, 5:57 AM EST
Where: Burlington County, 0.69 mi S of South Pemberton
Measured: 52 kt (60 mph) estimated gust
Reported by: State Official
Coordinates: 39.960, -74.680

Nine poles were blown down. Numerous trees and wires were also blown down.

Thunderstorm Wind, Burlington

When: June 24, 6:05 AM EST
Where: Burlington County, Browns Mills
Measured: 65 kt (75 mph) estimated gust
Reported by: NWS Storm Survey
Coordinates: 39.970, -74.580

Trees and wires were reported down. Several power poles down as well. A survey team determined the damage to have been caused by a microburst. A path of damage began on Crescent Drive with downed trees and wires then extended southeast onto Trenton road where multiple poles were downed. Damage extended onto Broadway and Pear roads and nearby Mirror Lake.

Thunderstorm Wind, Cumberland

When: June 24, 6:05 AM EST
Where: Cumberland County, 0.87 mi NE of Main Avenue
Measured: 52 kt (60 mph) estimated gust
Reported by: Public
Coordinates: 39.510, -74.990

Trees were blown down as well as a small truss ham radio tower.

Flood, Mercer

When: June 24, 6:16 AM EST
Where: Mercer County, 1.12 mi SE of Woodsville to 2.04 mi E of Harbourton
Cause: Heavy Rain / Tropical System
Reported by: Department of Highways
Coordinates: 40.370, -74.814

Roadway flooding occurred on state highway 31 near county road 654.

Thunderstorm Wind, Monmouth

When: June 24, 6:20 AM EST
Where: Monmouth County, 0.87 mi SW of Freewood Acres
Measured: 52 kt (60 mph) estimated gust
Reported by: Emergency Manager
Coordinates: 40.170, -74.240

Several buildings were damage with multiple cars overturned.

Tornado, Monmouth

When: June 24, 6:21 AM EST to 6:23 AM EST
Where: Monmouth County, 0.5 mi NNW of Ft Plains to 0.17 mi ENE of Ft Plains
Rating: EF0
Path length: 0.5 mi
Path width: 40 yd
Reported by: NWS Storm Survey
Coordinates: 40.187, -74.252

A storm survey found several trees uprooted and snapped in The|Home Depot parking lot where the tornado had approximately |touched down. A video posted on social media captured the tornado |as it moved southeast through the Home Depot parking lot. In the |same shopping center, metal roofing from a Chase Bank was torn |and later found a half mile away.

Numerous large hardwood trees were uprooted with others snapped |toward the top of the trunks at the southbound jug handle on Route|9 and West Farms Road as the tornado tracked to the southeast. |Numerous uprooted and snapped trees were found in Ideal Plaza. A |large metal container for clothing donations was knocked over. |Three cars that were parked in the shopping center parking lot at|the time the tornado moved through were pushed into each other.

The storm then caused roofing and siding damage to the building|occupied by Ice Cream on 9. A fence and additional trees were|downed on the property as well. The cloth draping on a nearby |billboard sign was torn off.

The tornado likely dissipated shortly after. Evidence from the |storm survey and radar indicated the tornado tracked to the|southeast adjacent to the south bound side of Route 9 for a half |mile and was on the ground for less than two minutes.

Tornado, Monmouth

When: June 24, 6:27 AM EST to 6:28 AM EST
Where: Monmouth County, 0.7 mi WNW of Lower Squankum to 0.58 mi W of Lower Squankum
Rating: EF0
Path length: 0.3 mi
Path width: 25 yd
Reported by: NWS Storm Survey
Coordinates: 40.172, -74.183

This tornado tracked briefly |through Oak Glen Park. A large pine tree near a soccer field in|the park was snapped toward the base of the trunk and several |large metal trash cans were pushed over, with all of these damage |indicators facing to the southeast. On the other side of the |soccer field, numerous hardwood trees were uprooted, falling to|the northeast. There were additional downed trees in the park as|the storm moved southeast before quickly dissipating.

Thunderstorm Wind, Monmouth

When: June 24, 6:30 AM EST
Where: Monmouth County, 0.69 mi N of Spring Lake Hgts
Measured: 52 kt (60 mph) estimated gust
Reported by: Public
Coordinates: 40.160, -74.050

Extensive tree damage was reported. Time is estimated from radar.

Funnel Cloud, Burlington

When: June 24, 7:02 AM EST
Where: Burlington County, 0.53 mi W of (Wri)mc Guire Afb
Reported by: Newspaper
Coordinates: 40.000, -74.610

A picture of a funnel cloud was sent into a newspaper. This was also observed by a few residents in Browns Mills.

Flash Flood, Middlesex

When: June 24, 7:05 AM EST to 8:05 AM EST
Where: Middlesex County, 1.6 mi SW of Middlesex to 1.13 mi SSW of Middlesex
Cause: Heavy Rain
Reported by: 911 Call Center
Coordinates: 40.554, -74.493

A section of interstate 287 near Possumtown flooded due to heavy rain. Unusual spot for flooding.

Flood, Somerset

When: June 24, 7:20 AM EST
Where: Somerset County, 1.62 mi ENE of Green Brook to 1.92 mi ENE of Green Brook
Cause: Heavy Rain / Tropical System
Reported by: Department of Highways
Coordinates: 40.632, -74.444

Roadway flooding on US Highway 22 near Somerset Avenue and Watchung Avenue.

Flood, Middlesex

When: June 24, 7:30 AM EST
Where: Middlesex County, 1 mi WSW of Monmouth Jct to 0.89 mi WNW of Monmouth Jct
Cause: Heavy Rain / Tropical System
Reported by: Department of Highways
Coordinates: 40.377, -74.569

Flooding occurred on us highway 1 southbound at Raymond road. Jughandle turn blocked.

Flood, Morris

When: June 24, 8:20 AM EST
Where: Morris County, 0.88 mi ESE of Pine Brook to 0.89 mi SE of Pine Brook
Cause: Heavy Rain / Tropical System
Reported by: Department of Highways
Coordinates: 40.864, -74.365

Roadway flooding occurred on us highway 46 approaching interstate 80.

Heavy Rain, Mercer

When: June 24, 8:58 AM EST
Where: Mercer County, Princeton Jct
Reported by: Trained Spotter
Coordinates: 40.320, -74.620

In Princeton Junction, 3.25 inches of fell.

Heavy Rain, Warren

When: June 24, 8:58 AM EST
Where: Warren County, 0.87 mi SE of Stewartsville
Reported by: CoCoRaHS
Coordinates: 40.690, -75.110

Inches of rain 2.68 fell in Stewartsville.

What these are

Thunderstorm Wind: Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.
Flood: Flooding that develops more slowly than a flash flood: rivers leaving their banks, or water standing over land for an extended time.
Tornado: A violently rotating column of air in contact with the ground and extending from a thunderstorm, filed with its path, width and Fujita or Enhanced Fujita rating from the damage survey.
Funnel Cloud: A rotating column of cloud extending from a thunderstorm that did not reach the ground.
Flash Flood: Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.
Heavy Rain: Rainfall totals unusual for the place and season that did not produce a flood.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

Every storm in New Jersey in 2017 Every state in 2017 This day in weather history The tornado archive for New Jersey, 2017 Warnings in New Jersey, June 2017

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 695850, 695845, 695844, 695846, 695847, 695854, 695849, 695851, 695848, 695855, 695856, 695857, 696254, 695852, 696244, 696245, 695858, 696248, 698898, 696253, 696256, 696257, 696258, 696259.