Alert archive / New Jersey / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 192, NWS Philadelphia/Mount Holly

July 14, 2023Morris County, Sussex County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 14, 2023, 7:27 AM EDT for Morris County, Sussex County, New Jersey. It was in force for 18 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 14, 2023, 7:27 AM EDT (11:27 UTC)
Expired
Jul 14, 2023, 7:45 AM EDT
In force
18 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), 112 km from the middle of the area, began a volume at 11:29 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 00:00Z, 11.5 hours before the alert went out and 129 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 00:00Z on 2023-07-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1347 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 00:00Z on 2023-07-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 202 square meters per square second.193958Sfc1 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
1347 J/kg
Mixed-layer CIN
-64 J/kg
Mixed-layer LCL
910 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
202 m²/s²
0-3 km storm-relative helicity
222 m²/s²
Significant tornado parameter
1.0
Supercell composite
11.4

Open this sounding in Storm Lab

The text

As transmitted.

495 
WUUS51 KPHI 141127
SVRPHI
NJC027-037-141145-
/O.NEW.KPHI.SV.W.0192.230714T1127Z-230714T1145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
727 AM EDT Fri Jul 14 2023

The National Weather Service in Mount Holly NJ has issued a

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

* Until 745 AM EDT.

* At 726 AM EDT, severe thunderstorms were located along a line
  extending from near Lake Telemark to near Boonton to Caldwell,
  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...
  Hopatcong, East Hanover, Lincoln Park, Kinnelon, Boonton, Butler,
  Mount Arlington, Mountain Lakes, Riverdale, Pequannock Township,
  Lake Telemark, Green Pond and White Meadow Lake.

This includes the following highways...
 Interstate 80 in New Jersey between mile markers 45 and 48.
 Interstate 287 in New Jersey between mile markers 44 and 54.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 4091 7434 4088 7434 4086 7432 4080 7436
      4091 7444 4094 7472 4108 7450 4104 7450
      4105 7445 4102 7443 4103 7442 4100 7430
      4097 7428 4092 7429 4090 7427
TIME...MOT...LOC 1126Z 242DEG 38KT 4097 7457 4095 7438 4082 7428 

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

$$

MLB
1 follow-up statement
655 
WWUS51 KPHI 141143
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
743 AM EDT Fri Jul 14 2023

NJC027-037-141152-
/O.EXP.KPHI.SV.W.0192.000000T0000Z-230714T1145Z/
Morris NJ-Sussex NJ-
743 AM EDT Fri Jul 14 2023

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MORRIS AND SOUTH
CENTRAL SUSSEX COUNTIES WILL EXPIRE AT 745 AM EDT...
    
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire.  However gusty
winds and heavy rain are still possible with these thunderstorms.

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 4091 7434 4088 7434 4086 7432 4080 7436
      4091 7444 4094 7472 4108 7450 4104 7450
      4105 7445 4102 7443 4103 7442 4100 7430
      4097 7428 4092 7429 4090 7427
TIME...MOT...LOC 1142Z 242DEG 38KT 4104 7438 4102 7419 4089 7409 

$$

MPS

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 13, 8:39 PM EDTCoastal Flood AdvisoryPHIOcean5 hr
Jul 13, 8:53 PM EDTSevere Thunderstorm WarningPHISussex67 min
Jul 13, 9:57 PM EDTSevere Thunderstorm WarningPHISussex48 min
Jul 13, 10:49 PM EDTSpecial Weather StatementPHISussex26 min
Jul 14, 1:09 AM EDTSpecial Weather StatementPHISussex21 min
Jul 14, 1:52 AM EDTAreal Flood AdvisoryPHISussex3 hr
Jul 14, 5:54 AM EDTSevere Thunderstorm WarningPHIBurlington, Mercer, Middlesex, Somerset51 min
Jul 14, 6:02 AM EDTSpecial Weather StatementPHIMercer28 min
Jul 14, 6:20 AM EDTSevere Thunderstorm WarningPHIHunterdon, Mercer, Morris, Somerset40 min
Jul 14, 6:33 AM EDTSpecial Weather StatementPHIWarren27 min
Jul 14, 6:35 AM EDTSpecial Weather StatementPHIMiddlesex25 min
Jul 14, 6:40 AM EDTSevere Thunderstorm WarningPHIMiddlesex, Somerset50 min
Jul 14, 6:55 AM EDTSevere Thunderstorm WarningPHIHunterdon, Middlesex, Morris, Somerset, Sussex, Warren50 min
Jul 14, 6:59 AM EDTSpecial Weather StatementPHIWarren31 min
Jul 14, 7:22 AM EDTSpecial Weather StatementPHISussex23 min
Jul 14, 7:41 AM EDTSpecial Weather StatementPHISussex34 min
Jul 14, 4:21 PM EDTSpecial Weather StatementPHISomerset39 min
Jul 14, 4:54 PM EDTSpecial Weather StatementPHISomerset51 min
Jul 14, 6:06 PM EDTSpecial Weather StatementPHIMorris24 min
Jul 14, 6:07 PM EDTSpecial Weather StatementPHIWarren38 min
Jul 14, 6:20 PM EDTSpecial Weather StatementPHISussex25 min
Jul 14, 6:22 PM EDTSevere Thunderstorm WarningPHIWarren38 min
Jul 14, 6:26 PM EDTSevere Thunderstorm WarningPHISussex, Warren49 min
Jul 14, 6:46 PM EDTSpecial Weather StatementPHISussex29 min
Jul 14, 6:52 PM EDTSevere Thunderstorm WarningPHISussex, Warren53 min
Jul 14, 7:03 PM EDTSevere Thunderstorm WarningPHISussex41 min
Jul 14, 7:08 PM EDTAreal Flood AdvisoryPHISussex, Warren39 min
Jul 14, 7:20 PM EDTSpecial Weather StatementPHIWarren25 min
Jul 14, 7:40 PM EDTFlash Flood WarningPHIMorris, Sussex, Warren6 hr
Jul 14, 7:46 PM EDTAreal Flood AdvisoryPHISussex2 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.