Alert archive / New Jersey / Severe Thunderstorm Warnings in 2024

Severe Thunderstorm Warning 79, NWS Philadelphia/Mount Holly

June 30, 2024Northampton County, Pennsylvania; 4 counties in New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 30, 2024, 3:26 PM EDT for Northampton County, Pennsylvania; 4 counties in New Jersey. It was in force for 49 min. 4 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 30, 2024, 3:26 PM EDT (19:26 UTC)
Expired: Jun 30, 2024, 4:15 PM EDT
In force: 49 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Hunterdon County, NJ, Morris County, NJ, Somerset County, NJ, Warren County, NJ, Northampton County, PA

The radar

The Philadelphia radar (KDIX), 93 km from the middle of the area, began a volume at 19:29 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 30, 3:30 PM EDT	TSTM WND DMG	Nazareth, PA	Large branches snapped and winds estimated around 60 mph.
Jun 30, 3:39 PM EDT	TSTM WND DMG	2 Ene Belvidere, NJ	NJ DOT - STMC: Downed tree on US 46 westbound West of CR 519/Bridgeville Rd (White Twp) 1 Right lane of 2 lanes closed. Time estimated from radar.
Jun 30, 4:00 PM EDT	TSTM WND DMG	2 Ene High Bridge, NJ	Pictures sent in of a several trees snapped or uprooted due to a microburst. Time given in report.
Jun 30, 4:15 PM EDT	TSTM WND DMG	2 Sse Oldwick, NJ	Many large limbs snapped at the intersection of Tree Top Road and Cedar Road. 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 30, 11:09 AM EDT	Severe Thunderstorm Watch	SPC	10 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 7.4 hours before the alert went out and 169 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: 856 J/kg
Mixed-layer CIN: -133 J/kg
Mixed-layer LCL: 1165 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 79 m²/s²
0-3 km storm-relative helicity: 66 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

As transmitted.

261 
WUUS51 KPHI 301926
SVRPHI
NJC019-027-035-041-PAC095-302015-
/O.NEW.KPHI.SV.W.0079.240630T1926Z-240630T2015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
326 PM EDT Sun Jun 30 2024

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Northern Hunterdon County in northwestern New Jersey...
  Southwestern Morris County in northern New Jersey...
  Southern Warren County in northwestern New Jersey...
  Northern Somerset County in northern New Jersey...
  Northeastern Northampton County in eastern Pennsylvania...

* Until 415 PM EDT.

* At 325 PM EDT, a severe thunderstorm was located over Belfast, or
  near Easton, moving east at 45 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Easton, Morristown, Somerville, Bridgewater, Forks, Middlesex,
  Bound Brook, Hackettstown, Wilson, Washington, Nazareth, Morris
  Plains, Bangor, Mendham, High Bridge, Pen Argyl, Wind Gap, Clinton,
  Belvidere, and Harmony.

This includes the following highways...
 Interstate 78 in Pennsylvania near mile marker 76.
 Interstate 78 in New Jersey near mile marker 0, and between mile
markers 3 and 38.
 Interstate 287 in New Jersey between mile markers 14 and 36.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

In addition to damaging winds, frequent cloud to ground lightning is 
occurring with this storm. Move indoors immediately. Remember, if 
you can hear thunder, you are close enough to be struck by lightning.

&&

LAT...LON 4058 7451 4056 7453 4069 7537 4085 7534
      4087 7528 4083 7446
TIME...MOT...LOC 1925Z 277DEG 39KT 4078 7525 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Hoeflich

3 follow-up statements

130 
WWUS51 KPHI 301938
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
338 PM EDT Sun Jun 30 2024

NJC019-027-035-041-PAC095-302015-
/O.CON.KPHI.SV.W.0079.000000T0000Z-240630T2015Z/
Hunterdon NJ-Morris NJ-Warren NJ-Somerset NJ-Northampton PA-
338 PM EDT Sun Jun 30 2024

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM EDT
FOR NORTHERN HUNTERDON...SOUTHWESTERN MORRIS...SOUTHERN WARREN...
NORTHERN SOMERSET AND NORTHEASTERN NORTHAMPTON COUNTIES...

At 334 PM EDT, a severe thunderstorm was located over Roxburg, or 7
miles northeast of Easton, moving east at 45 mph.

HAZARD...60 mph wind gusts.

SOURCE...Public. At 330 PM in Nazareth in Northampton County PA, 
         large branches were reported snapped along with estimated 
         winds of 60 mph.

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

Locations impacted include...
Easton, Morristown, Somerville, Bridgewater, Forks, Middlesex, Bound
Brook, Hackettstown, Wilson, Washington, Nazareth, Morris Plains,
Bangor, Mendham, High Bridge, Pen Argyl, Wind Gap, Clinton,
Belvidere, and Harmony.

This includes the following highways...
 Interstate 78 in New Jersey near mile marker 0, and between mile
markers 3 and 38.
 Interstate 287 in New Jersey between mile markers 14 and 36.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 4058 7451 4056 7453 4069 7534 4084 7532
      4087 7528 4083 7446
TIME...MOT...LOC 1934Z 277DEG 39KT 4077 7511 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...OBSERVED
MAX WIND GUST...60 MPH

$$

Fitzsimmons

973 
WWUS51 KPHI 301947
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
347 PM EDT Sun Jun 30 2024

PAC095-301956-
/O.CAN.KPHI.SV.W.0079.000000T0000Z-240630T2015Z/
Northampton PA-
347 PM EDT Sun Jun 30 2024

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN NORTHAMPTON
COUNTY IS CANCELLED...

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

A Severe Thunderstorm Watch remains in effect until 700 PM EDT for
northern and northwestern New Jersey...and eastern Pennsylvania.

LAT...LON 4059 7451 4058 7452 4067 7518 4068 7517
      4068 7519 4075 7516 4078 7514 4080 7510
      4085 7508 4086 7505 4083 7446
TIME...MOT...LOC 1946Z 277DEG 39KT 4075 7494 

$$

NJC019-027-035-041-302015-
/O.CON.KPHI.SV.W.0079.000000T0000Z-240630T2015Z/
Hunterdon NJ-Morris NJ-Warren NJ-Somerset NJ-
347 PM EDT Sun Jun 30 2024

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM EDT
FOR NORTHEASTERN HUNTERDON...SOUTHWESTERN MORRIS...SOUTHERN WARREN
AND NORTHWESTERN SOMERSET COUNTIES...

At 346 PM EDT, a severe thunderstorm was located over Washington, or
15 miles east of Easton, moving east at 45 mph.

HAZARD...60 mph wind gusts.

SOURCE...Public. At 330 PM in Nazareth in Northampton County PA, 
         large branches were reported snapped along with estimated 
         winds of 60 mph.

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

Locations impacted include...
Morristown, Bridgewater, Hackettstown, Washington, Morris Plains,
Mendham, High Bridge, Clinton, Belvidere, Harmony, Peapack And
Gladstone, Oxford, Alpha, Glen Gardner, Chester, Hampton, Lebanon,
Califon, Far Hills, and Bloomsbury.

This includes the following highways...
 Interstate 78 in New Jersey near mile marker 0, between mile markers
4 and 11, and between mile markers 17 and 38.
 Interstate 287 in New Jersey between mile markers 18 and 36.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 4059 7451 4058 7452 4067 7518 4068 7517
      4068 7519 4075 7516 4078 7514 4080 7510
      4085 7508 4086 7505 4083 7446
TIME...MOT...LOC 1946Z 277DEG 39KT 4075 7494 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...OBSERVED
MAX WIND GUST...60 MPH

$$

Fitzsimmons

880 
WWUS51 KPHI 302002
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
402 PM EDT Sun Jun 30 2024

NJC041-302011-
/O.CAN.KPHI.SV.W.0079.000000T0000Z-240630T2015Z/
Warren NJ-
402 PM EDT Sun Jun 30 2024

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN WARREN COUNTY IS
CANCELLED...

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

A Severe Thunderstorm Watch remains in effect until 700 PM EDT for
northern and northwestern New Jersey.

LAT...LON 4060 7451 4058 7452 4065 7502 4080 7487
      4084 7482 4083 7446
TIME...MOT...LOC 2001Z 277DEG 39KT 4073 7471 

$$

NJC019-027-035-302015-
/O.CON.KPHI.SV.W.0079.000000T0000Z-240630T2015Z/
Hunterdon NJ-Morris NJ-Somerset NJ-
402 PM EDT Sun Jun 30 2024

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM EDT
FOR NORTHEASTERN HUNTERDON...SOUTHWESTERN MORRIS AND NORTHWESTERN
SOMERSET COUNTIES...

At 401 PM EDT, a severe thunderstorm was located near Peapack And
Gladstone, or 12 miles northwest of Somerville, moving east at 45
mph.

HAZARD...60 mph wind gusts.

SOURCE...Public.

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

Locations impacted include...
Morristown, Bridgewater, Hackettstown, Morris Plains, Mendham, High
Bridge, Clinton, Peapack And Gladstone, Glen Gardner, Chester,
Hampton, Lebanon, Califon, Far Hills, Long Valley, Annandale,
Martinsville, Millington, White House Station, and Basking Ridge.

This includes the following highways...
 Interstate 78 in New Jersey between mile markers 17 and 38.
 Interstate 287 in New Jersey between mile markers 18 and 36.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 4060 7451 4058 7452 4065 7502 4080 7487
      4084 7482 4083 7446
TIME...MOT...LOC 2001Z 277DEG 39KT 4073 7471 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...OBSERVED
MAX WIND GUST...60 MPH

$$

Fitzsimmons

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 29, 8:22 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery	53 min
Jun 29, 10:23 PM EDT	Flash Flood Warning	PHI	Chester	4 hr
Jun 30, 1:18 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	42 min
Jun 30, 1:57 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	48 min
Jun 30, 2:10 PM EDT	Severe Thunderstorm Warning	PHI	Monroe, Northampton	50 min
Jun 30, 2:42 PM EDT	Severe Thunderstorm Warning	PHI	Northampton	63 min
Jun 30, 2:45 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Lehigh, Monroe, Northampton	45 min
Jun 30, 3:01 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Montgomery	59 min
Jun 30, 3:46 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Lehigh, Montgomery	44 min
Jun 30, 3:52 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Delaware, Montgomery	38 min
Jun 30, 4:25 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	50 min
Jun 30, 4:37 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Lehigh, Northampton	53 min
Jun 30, 4:54 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Montgomery	51 min
Jun 30, 5:19 PM EDT	Flash Flood Warning	PHI	Chester, Delaware, Philadelphia	3 hr
Jun 30, 5:20 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware	40 min
Jun 30, 5:51 PM EDT	Severe Thunderstorm Warning	PHI	Delaware, Philadelphia	39 min
Jun 30, 5:54 PM EDT	Flash Flood Warning	PHI	Delaware, Philadelphia	3 hr
Jun 30, 7:31 PM EDT	Severe Thunderstorm Warning	PHI	Chester	44 min
Jun 30, 7:23 AM EDT	Flash Flood Warning	PHI	Atlantic, Cape May, Cumberland	4 hr
Jun 30, 8:00 AM EDT	Special Marine Warning	PHI		49 min
Jun 30, 3:16 PM EDT	Small Craft Advisory	PHI		21 hr
Jun 30, 4:10 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Middlesex, Morris, Somerset	35 min
Jun 30, 4:44 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Middlesex, Morris, Somerset	31 min
Jun 30, 4:53 PM EDT	Flash Flood Warning	PHI	Hunterdon, Middlesex, Morris, Somerset	3 hr
Jun 30, 5:09 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden	51 min
Jun 30, 5:11 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Middlesex, Somerset	49 min
Jun 30, 5:20 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth	25 min
Jun 30, 5:26 PM EDT	Special Marine Warning	PHI		34 min
Jun 30, 5:55 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex, Monmouth, Somerset	50 min
Jun 30, 6:06 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Cumberland, Gloucester, Salem	39 min
Jun 30, 6:17 PM EDT	Special Marine Warning	PHI		58 min
Jun 30, 6:26 PM EDT	Special Marine Warning	PHI		64 min
Jun 30, 6:35 PM EDT	Severe Thunderstorm Warning	PHI	Camden, Gloucester, Salem	40 min
Jun 30, 6:40 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Ocean	65 min
Jun 30, 6:42 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex, Monmouth	48 min
Jun 30, 6:44 PM EDT	Special Marine Warning	PHI		2 hr
Jun 30, 6:49 PM EDT	Special Marine Warning	PHI		83 min
Jun 30, 7:00 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland	45 min
Jun 30, 7:34 PM EDT	Special Marine Warning	PHI		27 min
Jun 30, 7:37 PM EDT	Special Marine Warning	PHI		53 min
Jun 30, 7:43 PM EDT	Severe Thunderstorm Warning	PHI	Cape May, Cumberland	24 min
Jun 30, 7:56 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Camden, Cumberland, Gloucester, Salem	49 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2024 Severe Thunderstorm Warnings in Pennsylvania, 2024 Every severe thunderstorm warning in 2024

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.