Alert archive / New Jersey / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 164, NWS Philadelphia/Mount Holly

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

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 4, 2023, 3:45 PM EDT for Morris County, Sussex County, New Jersey. It was in force for 45 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, 3:45 PM EDT (19:45 UTC)
Expired
Jul 4, 2023, 4:30 PM EDT
In force
45 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Morris County, NJ, Sussex County, NJ

The radar

The Philadelphia radar (KDIX), 122 km from the middle of the area, began a volume at 19:47 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, 7.8 hours before the alert went out and 138 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.

761 
WUUS51 KPHI 041945
SVRPHI
NJC027-037-042030-
/O.NEW.KPHI.SV.W.0164.230704T1945Z-230704T2030Z/

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

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Northeastern Morris County in northern New Jersey...
  Southeastern Sussex County in northwestern New Jersey...

* Until 430 PM EDT.

* At 345 PM EDT, a severe thunderstorm was located over Ogdensburg,
  or 9 miles east of Newton, moving south at 15 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...
  Dover, Hopatcong, Boonton, Wharton, Rockaway, Mount Arlington,
  Franklin, Mountain Lakes, Stanhope, Netcong, Ogdensburg, Victory
  Gardens, Lake Mohawk, Succasunna, Succasunna-Kenvil, Lake Telemark,
  Green Pond, Budd Lake and White Meadow Lake.

This includes the following highways...
 Interstate 80 in New Jersey between mile markers 27 and 42.
 Interstate 287 in New Jersey between mile markers 43 and 47.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4112 7446 4109 7450 4107 7449 4104 7450
      4105 7445 4102 7443 4103 7442 4102 7441
      4088 7434 4083 7471 4112 7469 4115 7447
TIME...MOT...LOC 1945Z 352DEG 14KT 4108 7457 

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

$$

MJL
1 follow-up statement
187 
WWUS51 KPHI 042025
SVSPHI

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

NJC027-037-042035-
/O.EXP.KPHI.SV.W.0164.000000T0000Z-230704T2030Z/
Morris NJ-Sussex NJ-
425 PM EDT Tue Jul 4 2023

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MORRIS AND
SOUTHEASTERN SUSSEX COUNTIES WILL EXPIRE AT 430 PM EDT...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.  However heavy rain is still possible with this
thunderstorm.

LAT...LON 4112 7446 4109 7450 4107 7449 4104 7450
      4105 7445 4102 7443 4103 7442 4102 7441
      4088 7434 4083 7471 4112 7469 4115 7447
TIME...MOT...LOC 2025Z 270DEG 14KT 4093 7454 

$$

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, 3:52 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, 4:26 PM EDTSevere Thunderstorm WarningPHIMorris, Sussex, Warren23 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.