Alert archive / New Jersey / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 32, NWS Philadelphia/Mount Holly

April 15, 20234 counties in New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Apr 15, 2023, 3:29 PM EDT for 4 counties in New Jersey. It was in force for 31 min. 1 report 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: Apr 15, 2023, 3:29 PM EDT (19:29 UTC)
Expired: Apr 15, 2023, 4:00 PM EDT
In force: 31 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Atlantic County, NJ, Burlington County, NJ, Camden County, NJ, Gloucester County, NJ

The radar

The Philadelphia radar (KDIX), 46 km from the middle of the area, began a volume at 19:32 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
Apr 15, 3:40 PM EDT	HAIL 0.75	1 Se Waterford Twp, NJ

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 12:00Z, 7.5 hours before the alert went out and 201 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: 132 J/kg
Mixed-layer CIN: -40 J/kg
Mixed-layer LCL: 482 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 20 m²/s²
0-3 km storm-relative helicity: 111 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

532 
WUUS51 KPHI 151929
SVRPHI
NJC001-005-007-015-152000-
/O.NEW.KPHI.SV.W.0032.230415T1929Z-230415T2000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
329 PM EDT Sat Apr 15 2023

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Northwestern Atlantic County in southern New Jersey...
  Southeastern Camden County in southern New Jersey...
  East central Gloucester County in southern New Jersey...
  Central Burlington County in southern New Jersey...

* Until 400 PM EDT.

* At 329 PM EDT, a severe thunderstorm was located near Hammonton, or
  16 miles northeast of Vineland, moving northeast at 15 mph.

  HAZARD...Quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Minor damage to vehicles is possible.

* Locations impacted include...
  Hammonton, Shamong, Chesilhurst, Atco, Victory Lakes, Wharton State
  Forest, Atsion, Monroe Township, Williamstown, Medford Lakes,
  Folsom and Collings Lakes.

This includes Atlantic City Expressway between mile markers 26 and
37.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3956 7483 3963 7502 3989 7483 3976 7459
TIME...MOT...LOC 1929Z 215DEG 12KT 3967 7484 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH

$$

Hoeflich

2 follow-up statements

455 
WWUS51 KPHI 151940
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
340 PM EDT Sat Apr 15 2023

NJC001-005-007-015-152000-
/O.CON.KPHI.SV.W.0032.000000T0000Z-230415T2000Z/
Atlantic NJ-Camden NJ-Gloucester NJ-Burlington NJ-
340 PM EDT Sat Apr 15 2023

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM EDT
FOR NORTHWESTERN ATLANTIC...SOUTHEASTERN CAMDEN...SOUTHEASTERN
GLOUCESTER AND CENTRAL BURLINGTON COUNTIES...

At 340 PM EDT, a severe thunderstorm was located over Chesilhurst, or
19 miles southeast of Gloucester City, moving north at 15 mph.

HAZARD...Quarter size hail.

SOURCE...Radar indicated.

IMPACT...Minor damage to vehicles is possible.

Locations impacted include...
Hammonton, Berlin, Shamong, Chesilhurst, Atco, Atsion, Williamstown
and Medford Lakes.

This includes Atlantic City Expressway between mile markers 30 and
37.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3961 7477 3966 7497 3970 7497 3988 7484
      3987 7479 3984 7473 3979 7465 3965 7473
TIME...MOT...LOC 1940Z 193DEG 12KT 3971 7484 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH

$$

Hoeflich

541 
WWUS51 KPHI 151952
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
352 PM EDT Sat Apr 15 2023

NJC001-005-007-015-152002-
/O.EXP.KPHI.SV.W.0032.000000T0000Z-230415T2000Z/
Atlantic NJ-Camden NJ-Gloucester NJ-Burlington NJ-
352 PM EDT Sat Apr 15 2023

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN ATLANTIC...
SOUTHEASTERN CAMDEN...SOUTHEASTERN GLOUCESTER AND CENTRAL BURLINGTON
COUNTIES WILL EXPIRE AT 400 PM EDT...
                
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 will be allowed to expire.  However small hail
is still possible with this thunderstorm.

LAT...LON 3961 7477 3966 7497 3970 7497 3988 7484
      3987 7479 3984 7473 3979 7465 3965 7473
TIME...MOT...LOC 1952Z 215DEG 12KT 3974 7481 

$$

Hoeflich

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 15, 4:29 AM EDT	Marine Dense Fog Advisory	PHI		54 hr
Apr 15, 1:09 PM EDT	Special Weather Statement	PHI	Sussex	36 min
Apr 15, 1:34 PM EDT	Severe Thunderstorm Warning	PHI	Warren	26 min
Apr 15, 1:49 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	26 min
Apr 15, 1:55 PM EDT	Areal Flood Advisory	PHI	Sussex	6 hr
Apr 15, 1:58 PM EDT	Severe Thunderstorm Warning	PHI	Warren	32 min
Apr 15, 2:06 PM EDT	Areal Flood Advisory	PHI	Mercer, Middlesex, Somerset	6 hr
Apr 15, 3:28 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Morris, Sussex, Warren	3 hr
Apr 15, 3:58 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Gloucester	3 hr
Apr 15, 4:05 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Mercer	25 min
Apr 15, 4:19 PM EDT	Flash Flood Warning	PHI	Burlington, Camden	3 hr
Apr 15, 4:49 PM EDT	Severe Thunderstorm Warning	PHI	Mercer, Middlesex, Somerset	26 min
Apr 15, 4:56 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon	14 min
Apr 15, 6:05 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Mercer, Somerset	96 min
Apr 15, 6:32 PM EDT	Areal Flood Warning	PHI	Hunterdon	5 hr

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.