Alert archive / New Jersey / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 46, NWS Philadelphia/Mount Holly

April 22, 2023Morris County, Sussex County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Apr 22, 2023, 8:07 PM EDT for Morris County, Sussex 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: Apr 22, 2023, 8:07 PM EDT (00:07 UTC)
Expired: Apr 22, 2023, 8:30 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

The nearest sounding before it

Brookhaven, NY (KOKX), launched 00:00Z, 0.1 hours before the alert went out and 134 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: 208 J/kg
Mixed-layer CIN: -99 J/kg
Mixed-layer LCL: 590 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 344 m²/s²
0-3 km storm-relative helicity: 412 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.4

Open this sounding in Storm Lab

The text

As transmitted.

415 
WUUS51 KPHI 230007
SVRPHI
NJC027-037-230030-
/O.NEW.KPHI.SV.W.0046.230423T0007Z-230423T0030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
807 PM EDT Sat Apr 22 2023

The National Weather Service in Mount Holly NJ has issued a

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

* Until 830 PM EDT.

* At 806 PM EDT, a severe thunderstorm was located over Green Pond,
  or 7 miles south of West Milford, moving north at 45 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...
  Kinnelon, Boonton, Butler, Lake Telemark, Green Pond, Highland
  Lake, Vernon Valley and White Meadow Lake.

This includes Interstate 287 in New Jersey between mile markers 46
and 51.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4120 7436 4110 7449 4107 7449 4104 7450
      4105 7445 4102 7443 4103 7442 4102 7440
      4100 7431 4090 7436 4095 7459 4126 7449
TIME...MOT...LOC 0006Z 197DEG 39KT 4100 7445 

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

$$

RCM

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 22, 8:16 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex, Monmouth, Ocean	33 min
Apr 22, 8:29 PM EDT	Severe Thunderstorm Warning	PHI	Morris	19 min
Apr 22, 8:46 PM EDT	Special Weather Statement	PHI	Monmouth, Ocean	59 min
Apr 22, 9:23 PM EDT	Special Marine Warning	PHI		67 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2023 Every 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.