Alert archive / New Jersey / Severe Thunderstorm Warnings in 2025

Severe Thunderstorm Warning 81, NWS Philadelphia/Mount Holly

June 19, 20257 counties in New Jersey; Bucks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 19, 2025, 6:14 PM EDT for 7 counties in New Jersey; Bucks County, Pennsylvania. It was in force for 31 min. 11 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jun 19, 2025, 6:14 PM EDT (22:14 UTC)
Expired: Jun 19, 2025, 6:45 PM EDT
In force: 31 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Morris County, NJ, Somerset County, NJ, Warren County, NJ, Bucks County, PA

The radar

The Philadelphia radar (KDIX), 62 km from the middle of the area, began a volume at 22:18 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
Jun 19, 6:18 PM EDT	TSTM WND DMG	Lambertville, NJ	Multiple trees and power lines down. Time estimated from radar.
Jun 19, 6:18 PM EDT	TSTM WND DMG	Lawrence Twp, NJ	Multiple trees and wires down. Time estimated from radar.
Jun 19, 6:22 PM EDT	TSTM WND DMG	Neshanic Station, NJ	Several trees and limbs downed; time estimated.
Jun 19, 6:25 PM EDT	TSTM WND DMG	Manalapan Twp, NJ	Corrects previous tstm wnd dmg report from Manalapan Twp. Tree onto house Kensington Dr.
Jun 19, 6:26 PM EDT	TSTM WND DMG	East Brunswick, NJ	Multiple trees and power lines down. Time estimated from radar.
Jun 19, 6:26 PM EDT	TSTM WND DMG	Jamesburg, NJ	Tree down. Time estimated from radar.
Jun 19, 6:30 PM EDT	TSTM WND DMG	Old Bridge, NJ	Tree downed, time estimated.
Jun 19, 6:30 PM EDT	TSTM WND DMG	Three Bridges, NJ	Several trees and large limbs downed; time estimated.
Jun 19, 6:33 PM EDT	TSTM WND DMG	1 Nw Cheesequake, NJ	Large tree uprooted. Time estimated from radar.
Jun 19, 6:40 PM EDT	TSTM WND DMG	Hazlet Twp, NJ	Tree into house on Laurel Ave. Time estimated from radar.
Jun 19, 6:45 PM EDT	TSTM WND DMG	Keansburg, NJ	Tree into houses on Forest Ave. Time estimated from radar.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 19, 1:46 PM EDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 10.2 hours before the alert went out and 137 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 14 J/kg
Mixed-layer CIN: -197 J/kg
Mixed-layer LCL: 907 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 72 m²/s²
0-3 km storm-relative helicity: 79 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

209 
WUUS51 KPHI 192214
SVRPHI
NJC019-021-023-025-027-035-041-PAC017-192245-
/O.NEW.KPHI.SV.W.0081.250619T2214Z-250619T2245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
614 PM EDT Thu Jun 19 2025

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Southwestern Morris County in northern New Jersey...
  Hunterdon County in northwestern New Jersey...
  Mercer County in central New Jersey...
  East central Warren County in northwestern New Jersey...
  Somerset County in northern New Jersey...
  Central Monmouth County in central New Jersey...
  Middlesex County in northern New Jersey...
  Central Bucks County in southeastern Pennsylvania...

* Until 645 PM EDT.

* At 613 PM EDT, severe thunderstorms were located along a line
  extending from near Byram to Skillman to Twin Rivers, moving
  northeast at 55 mph.

  HAZARD...60 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to roofs, siding, trees, and power lines is 
           possible.

* Locations impacted include...
  New Brunswick, Perth Amboy, Somerville, Somerset, Edison, Old
  Bridge, East Brunswick, Bridgewater, South Brunswick, Sayreville,
  North Brunswick, Manalapan, Carteret, Middlesex, Princeton, Bound
  Brook, Manville, Matawan, Byram, and Jamesburg.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4014 7446 4031 7479 4037 7520 4082 7490
      4072 7444 4071 7442 4067 7446 4065 7440
      4060 7446 4060 7425 4058 7421 4055 7425
      4050 7426 4050 7428 4047 7427 4044 7420
      4046 7418 4044 7410
TIME...MOT...LOC 2213Z 217DEG 49KT 4046 7502 4041 7472 4025 7448 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

MPS

2 follow-up statements

019 
WWUS51 KPHI 192233
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
633 PM EDT Thu Jun 19 2025

NJC021-041-PAC017-192242-
/O.CAN.KPHI.SV.W.0081.000000T0000Z-250619T2245Z/
Mercer NJ-Warren NJ-Bucks PA-
633 PM EDT Thu Jun 19 2025

...THE SEVERE THUNDERSTORM WARNING FOR MERCER...EAST CENTRAL WARREN
AND CENTRAL BUCKS COUNTIES IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 900 PM EDT for
northern, central and northwestern New Jersey.

LAT...LON 4079 7483 4072 7446 4072 7444 4071 7442
      4067 7446 4065 7440 4060 7446 4060 7425
      4058 7421 4055 7425 4050 7426 4050 7428
      4047 7427 4044 7420 4046 7418 4044 7410
      4023 7435 4043 7463 4048 7499
TIME...MOT...LOC 2232Z 214DEG 39KT 4055 7492 4048 7459 4028 7430 

$$

NJC019-023-025-027-035-192245-
/O.CON.KPHI.SV.W.0081.000000T0000Z-250619T2245Z/
Morris NJ-Hunterdon NJ-Somerset NJ-Monmouth NJ-Middlesex NJ-
633 PM EDT Thu Jun 19 2025

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM EDT
FOR SOUTHWESTERN MORRIS...NORTHEASTERN HUNTERDON...SOMERSET...NORTH
CENTRAL MONMOUTH AND MIDDLESEX COUNTIES...

At 632 PM EDT, severe thunderstorms were located along a line
extending from near Flemington to Millstone to near Yorketown, moving
northeast at 45 mph.

HAZARD...60 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

IMPACT...Damage to roofs, siding, trees, and power lines is 
         possible.

Locations impacted include...
New Brunswick, Perth Amboy, Somerville, Somerset, Edison, Old Bridge,
East Brunswick, Bridgewater, South Brunswick, Sayreville, North
Brunswick, Marlboro, Carteret, Middlesex, Bound Brook, Manville,
Matawan, Jamesburg, Mendham, and Flemington.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4079 7483 4072 7446 4072 7444 4071 7442
      4067 7446 4065 7440 4060 7446 4060 7425
      4058 7421 4055 7425 4050 7426 4050 7428
      4047 7427 4044 7420 4046 7418 4044 7410
      4023 7435 4043 7463 4048 7499
TIME...MOT...LOC 2232Z 214DEG 39KT 4055 7492 4048 7459 4028 7430 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

MPS

240 
WWUS51 KPHI 192245
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
645 PM EDT Thu Jun 19 2025

NJC019-023-025-027-035-192254-
/O.EXP.KPHI.SV.W.0081.000000T0000Z-250619T2245Z/
Morris NJ-Hunterdon NJ-Somerset NJ-Monmouth NJ-Middlesex NJ-
645 PM EDT Thu Jun 19 2025

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN MORRIS...
NORTHEASTERN HUNTERDON...SOMERSET...NORTH CENTRAL MONMOUTH AND
MIDDLESEX COUNTIES WILL EXPIRE AT 645 PM EDT...

The storms which prompted the warning have weakened below severe
limits, and have exited the warned area. Therefore, the warning will
be allowed to expire.  However gusty winds and heavy rain are still
possible with these thunderstorms.

A Severe Thunderstorm Watch remains in effect until 900 PM EDT for
northern, central and northwestern New Jersey.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Mount Holly NJ.

LAT...LON 4079 7483 4072 7446 4072 7444 4071 7442
      4067 7446 4065 7440 4060 7446 4060 7425
      4058 7421 4055 7425 4050 7426 4050 7428
      4047 7427 4044 7420 4046 7418 4044 7410
      4023 7435 4043 7463 4048 7499
TIME...MOT...LOC 2244Z 217DEG 49KT 4068 7479 4061 7446 4041 7417 

$$

MPS

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 19, 2:27 PM EDT	Small Craft Advisory	PHI		16 hr
Jun 19, 2:44 PM EDT	Severe Thunderstorm Warning	PHI	Morris, Somerset	31 min
Jun 19, 3:14 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Somerset	46 min
Jun 19, 3:31 PM EDT	Severe Thunderstorm Warning	PHI	Morris, Sussex	29 min
Jun 19, 4:48 PM EDT	Special Marine Warning	PHI		42 min
Jun 19, 5:13 PM EDT	Severe Thunderstorm Warning Considerable damage threat	PHI	Burlington	47 min
Jun 19, 5:23 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester, Salem	52 min
Jun 19, 5:27 PM EDT	Special Marine Warning	PHI		63 min
Jun 19, 5:40 PM EDT	Severe Thunderstorm Warning Considerable damage threat	PHI	Burlington, Hunterdon, Mercer	50 min
Jun 19, 5:41 PM EDT	Severe Thunderstorm Warning Considerable damage threat	PHI	Cumberland, Gloucester, Salem	49 min
Jun 19, 5:55 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland	39 min
Jun 19, 6:34 PM EDT	Special Marine Warning	PHI		56 min
Jun 19, 6:52 PM EDT	Special Marine Warning	PHI		53 min
Jun 19, 6:55 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cape May, Cumberland	50 min
Jun 19, 7:02 PM EDT	Special Marine Warning	PHI		43 min
Jun 19, 7:06 PM EDT	Special Marine Warning	PHI		54 min
Jun 19, 7:22 PM EDT	Special Marine Warning	PHI		53 min
Jun 19, 12:06 AM EDT	Areal Flood Warning	PHI	Berks	2 hr
Jun 19, 4:34 PM EDT	Severe Thunderstorm Warning Considerable damage threat	PHI	Chester, Delaware	41 min
Jun 19, 5:02 PM EDT	Tornado Warning Considerable damage threat	PHI	Chester, Delaware	15 min
Jun 19, 5:31 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery	44 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2025 Severe Thunderstorm Warnings in Pennsylvania, 2025 Every severe thunderstorm warning in 2025

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.