Alert archive / New Jersey / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 167, NWS Philadelphia/Mount Holly

July 4, 2023Morris County, Sussex County, Warren County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 4, 2023, 4:26 PM EDT for Morris County, Sussex County, Warren County, New Jersey. It was in force for 23 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 4, 2023, 4:26 PM EDT (20:26 UTC)
Expired
Jul 4, 2023, 4:49 PM EDT
In force
23 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Morris County, NJ, Sussex County, NJ, Warren County, NJ

The radar

The Philadelphia radar (KDIX), 98 km from the middle of the area, began a volume at 20:29 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.

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 8.4 hours before the alert went out and 156 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-pSkew-T log-p diagram, Brookhaven, NY at 12:00Z on 2023-07-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 489 joules per kilogram.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.
HodographHodograph, Brookhaven, NY at 12:00Z on 2023-07-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 51 square meters per square second.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.
Mixed-layer CAPE
489 J/kg
Mixed-layer CIN
-41 J/kg
Mixed-layer LCL
701 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
51 m²/s²
0-3 km storm-relative helicity
186 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.1

Open this sounding in Storm Lab

The text

As transmitted.

111 
WUUS51 KPHI 042026
SVRPHI
NJC027-037-041-042100-
/O.NEW.KPHI.SV.W.0167.230704T2026Z-230704T2100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
426 PM EDT Tue Jul 4 2023

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Southwestern Morris County in northern New Jersey...
  Southern Sussex County in northwestern New Jersey...
  East central Warren County in northwestern New Jersey...

* Until 500 PM EDT.

* At 426 PM EDT, a severe thunderstorm was located over Budd Lake, or
  11 miles south of Newton, moving south at 20 mph.

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

  SOURCE...Radar indicated.

  IMPACT...Minor damage to vehicles is possible. Wind damage to 
           roofs, siding, trees, and power lines is possible.

* Locations impacted include...
  Hopatcong, Hackettstown, Mount Arlington, Mendham, Stanhope,
  Netcong, Chester, Allamuchy-Panther Valley, Succasunna,
  Succasunna-Kenvil, Long Valley, Budd Lake and Beatyestown.

This includes Interstate 80 in New Jersey between mile markers 20 and
30.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4077 7452 4072 7474 4074 7476 4074 7481
      4075 7483 4091 7485 4095 7470
TIME...MOT...LOC 2026Z 339DEG 19KT 4089 7474 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

MJL
1 follow-up statement
519 
WWUS51 KPHI 042049
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
449 PM EDT Tue Jul 4 2023

NJC027-037-041-042059-
/O.CAN.KPHI.SV.W.0167.000000T0000Z-230704T2100Z/
Morris NJ-Sussex NJ-Warren NJ-
449 PM EDT Tue Jul 4 2023

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN MORRIS...SOUTHERN
SUSSEX AND EAST CENTRAL WARREN COUNTIES IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.  However heavy rain is
still possible with this thunderstorm.

LAT...LON 4077 7452 4072 7474 4074 7476 4074 7481
      4075 7483 4091 7485 4095 7470
TIME...MOT...LOC 2047Z 339DEG 19KT 4077 7468 

$$

MJL

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 3, 8:27 PM EDTSevere Thunderstorm WarningPHICape May48 min
Jul 3, 8:34 PM EDTSpecial Marine WarningPHI116 min
Jul 3, 8:41 PM EDTSevere Thunderstorm WarningPHIGloucester, Salem49 min
Jul 3, 8:50 PM EDTAreal Flood AdvisoryPHIHunterdon, Morris, Sussex, Warren115 min
Jul 3, 8:58 PM EDTSevere Thunderstorm WarningPHIAtlantic, Cape May, Cumberland47 min
Jul 3, 9:02 PM EDTSpecial Marine WarningPHI118 min
Jul 3, 9:07 PM EDTFlash Flood WarningPHISalem5 hr
Jul 3, 9:22 PM EDTAreal Flood AdvisoryPHIMorris83 min
Jul 3, 9:25 PM EDTSevere Thunderstorm WarningPHICumberland, Gloucester, Salem35 min
Jul 3, 9:52 PM EDTSevere Thunderstorm Warning Considerable damage threatPHIAtlantic, Burlington, Camden, Gloucester, Salem38 min
Jul 3, 10:36 PM EDTAreal Flood AdvisoryPHIGloucester, Salem4 hr
Jul 4, 1:58 PM EDTSpecial Weather StatementPHIMonmouth32 min
Jul 4, 2:51 PM EDTSpecial Weather StatementPHIMiddlesex24 min
Jul 4, 2:58 PM EDTAreal Flood AdvisoryPHIMiddlesex, Monmouth3 hr
Jul 4, 3:09 PM EDTAreal Flood AdvisoryPHIMiddlesex, Morris, Somerset2 hr
Jul 4, 3:16 PM EDTSpecial Weather StatementPHIMercer, Middlesex, Monmouth29 min
Jul 4, 3:19 PM EDTSpecial Weather StatementPHIPassaic26 min
Jul 4, 3:22 PM EDTSevere Thunderstorm WarningPHIMercer, Middlesex, Monmouth, Ocean38 min
Jul 4, 3:34 PM EDTAreal Flood AdvisoryPHIMiddlesex, Monmouth, Somerset2 hr
Jul 4, 3:45 PM EDTSevere Thunderstorm WarningPHIMorris, Sussex45 min
Jul 4, 3:52 PM EDTSevere Thunderstorm WarningPHIBurlington, Mercer, Middlesex, Monmouth, Ocean38 min
Jul 4, 4:11 PM EDTAreal Flood AdvisoryPHIMercer, Middlesex, Monmouth, Ocean2 hr
Jul 4, 4:19 PM EDTSpecial Marine WarningPHI56 min
Jul 4, 4:24 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden, Monmouth, Ocean36 min
Jul 4, 4:43 PM EDTAreal Flood AdvisoryPHIBurlington, Mercer, Monmouth, Ocean2 hr
Jul 4, 4:59 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden, Gloucester, Ocean46 min
Jul 4, 5:23 PM EDTAreal Flood AdvisoryPHIBurlington, Camden112 min
Jul 4, 5:30 PM EDTSevere Thunderstorm WarningPHIHunterdon, Warren33 min
Jul 4, 5:44 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden, Gloucester46 min
Jul 4, 5:46 PM EDTFlash Flood WarningPHIBurlington, Camden3 hr
Jul 4, 6:02 PM EDTSpecial Weather StatementPHIMiddlesex28 min
Jul 4, 6:06 PM EDTAreal Flood AdvisoryPHIWarren114 min
Jul 4, 6:29 PM EDTSevere Thunderstorm Warning Considerable damage threatPHICamden, Gloucester21 min
Jul 4, 7:05 PM EDTAreal Flood AdvisoryPHICamden, Gloucester2 hr

Nearby

Severe Thunderstorm Warnings in New Jersey, 2023Every severe thunderstorm warning in 2023

Sources

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