Alert archive / New Jersey / Severe Thunderstorm Warnings in 2024

Severe Thunderstorm Warning 74, NWS Philadelphia/Mount Holly

June 30, 2024Sussex County, Warren County, New Jersey; Monroe County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 30, 2024, 1:57 PM EDT for Sussex County, Warren County, New Jersey; Monroe County, Pennsylvania. It was in force for 48 min. 2 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, 1:57 PM EDT (17:57 UTC)
Expired: Jun 30, 2024, 2:45 PM EDT
In force: 48 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Sussex County, NJ, Warren County, NJ, Monroe County, PA

The radar

The Philadelphia radar (KDIX), 142 km from the middle of the area, began a volume at 17:59 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, 2:30 PM EDT	TSTM WND DMG	Stillwater Twp, NJ	A few trees and wires down. Time estimated from radar.
Jun 30, 2:32 PM EDT	TSTM WND DMG	1 Wsw Fredon Twp, NJ	Large tree limb at least 6 inches in diameter lying across 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, 6.0 hours before the alert went out and 178 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.

469 
WUUS51 KPHI 301757
SVRPHI
NJC037-041-PAC089-301845-
/O.NEW.KPHI.SV.W.0074.240630T1757Z-240630T1845Z/

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

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Sussex County in northwestern New Jersey...
  Northeastern Warren County in northwestern New Jersey...
  Northeastern Monroe County in northeastern Pennsylvania...

* Until 245 PM EDT.

* At 157 PM EDT, a severe thunderstorm was located over Alpine
  Mountain, or 7 miles east of Mount Pocono, 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...
  Newton, Hopatcong, Franklin, Hamburg, Ogdensburg, Sussex,
  Branchville, Andover, Henryville, Lake Mohawk, Werry Lake,
  Greendell, Millbrook, Vernon Valley, Skytop, Mountainhome, Alpine
  Mountain, Pellettown, Crandon Lakes, and Flatbrookville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4126 7447 4094 7467 4107 7534 4124 7528
      4124 7513 4115 7515 4114 7509 4108 7503
      4116 7490 4125 7485
TIME...MOT...LOC 1757Z 285DEG 38KT 4114 7521 

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

$$

Fitzsimmons

1 follow-up statement

534 
WWUS51 KPHI 301830
SVSPHI

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

PAC089-301840-
/O.CAN.KPHI.SV.W.0074.000000T0000Z-240630T1845Z/
Monroe PA-
230 PM EDT Sun Jun 30 2024

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MONROE 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
northwestern New Jersey...and northeastern Pennsylvania.

LAT...LON 4094 7467 4099 7495 4102 7505 4106 7501
      4109 7497 4110 7497 4109 7499 4111 7499
      4114 7492 4114 7455
TIME...MOT...LOC 1830Z 282DEG 32KT 4106 7482 

$$

NJC037-041-301845-
/O.CON.KPHI.SV.W.0074.000000T0000Z-240630T1845Z/
Sussex NJ-Warren NJ-
230 PM EDT Sun Jun 30 2024

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 PM EDT
FOR SOUTHWESTERN SUSSEX AND NORTHEASTERN WARREN COUNTIES...

At 230 PM EDT, a severe thunderstorm was located over Five Points, or
near Newton, moving east at 35 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Newton, Hopatcong, Franklin, Hamburg, Ogdensburg, Andover,
Flatbrookville, Five Points, Lake Mohawk, Crandon Lakes, Greendell,
and Millbrook.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4094 7467 4099 7495 4102 7505 4106 7501
      4109 7497 4110 7497 4109 7499 4111 7499
      4114 7492 4114 7455
TIME...MOT...LOC 1830Z 282DEG 32KT 4106 7482 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
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 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, 2:10 PM EDT	Severe Thunderstorm Warning	PHI	Morris, Sussex, Warren	50 min
Jun 30, 2:42 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Somerset, Sussex, Warren	63 min
Jun 30, 3:16 PM EDT	Small Craft Advisory	PHI		21 hr
Jun 30, 3:26 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Somerset, Warren	49 min
Jun 30, 4:10 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Middlesex, Morris, Somerset	35 min
Jun 30, 4:25 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester	50 min
Jun 30, 4:37 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer	53 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, 5:51 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester, Salem	39 min
Jun 30, 5:54 PM EDT	Flash Flood Warning	PHI	Burlington, Camden, Gloucester	3 hr
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, 7:31 PM EDT	Severe Thunderstorm Warning	PHI	Salem	44 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
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, 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, 4:54 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

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.