Alert archive / New Jersey / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 259, NWS Philadelphia/Mount Holly

July 29, 20234 counties in New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 29, 2023, 6:07 PM EDT for 4 counties in New Jersey. It was in force for 68 min. 5 reports 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: Jul 29, 2023, 6:07 PM EDT (22:07 UTC)
Expired: Jul 29, 2023, 7:15 PM EDT
In force: 68 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Atlantic County, NJ, Cape May County, NJ, Cumberland County, NJ, Salem County, NJ

The radar

The Dover AFB radar (KDOX), 69 km from the middle of the area, began a volume at 22:07 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
Jul 29, 6:30 PM EDT	TSTM WND GST 52	Fortescue, NJ	Fortescue NJNET gusted to 52 mph.
Jul 29, 6:45 PM EDT	TSTM WND GST 40	Dennis Twp Njwxnet, NJ	NJWxNet gauge at Dennis Twp.
Jul 29, 6:55 PM EDT	TSTM WND GST 45	2 Se Woodbine, NJ	Mesonet station NJ55 Woodbine.
Jul 29, 6:55 PM EDT	TSTM WND GST 45	2 Se Woodbine, NJ	NJWxNet gauge at Woodbine.
Jul 29, 6:57 PM EDT	TSTM WND DMG	Seaville, NJ	Trees and wires down on East Katherine Avenue in Upper Township. Time estimated from radar.

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 29, 2:48 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 12:00Z, 10.1 hours before the alert went out and 159 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: 245 J/kg
Mixed-layer CIN: -215 J/kg
Mixed-layer LCL: 1190 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 179 m²/s²
0-3 km storm-relative helicity: 159 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

027 
WUUS51 KPHI 292207
SVRPHI
NJC001-009-011-033-292315-
/O.NEW.KPHI.SV.W.0259.230729T2207Z-230729T2315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
607 PM EDT Sat Jul 29 2023

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Southern Atlantic County in southern New Jersey...
  Cumberland County in southern New Jersey...
  Southern Salem County in southern New Jersey...
  Cape May County in southern New Jersey...

* Until 715 PM EDT.

* At 606 PM EDT, severe thunderstorms were located along a line
  extending from near Hancocks Bridge to 8 miles southeast of
  Woodland Beach to near Dover Base Housing, moving east at 40 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...
  Vineland, Atlantic City, Millville, Bridgeton, Ocean City,
  Cumberland, Pleasantville, Somers Point, Ventnor City, Brigantine,
  Northfield, Absecon, Margate City, Laurel Lake, Woodbine, Sea Isle
  City, Estell Manor, Longport, Greenwich and Shiloh.

This includes the following highways...
 Garden State Parkway between mile markers 14 and 42.
 Atlantic City Expressway between mile markers 0 and 15.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

In addition to 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 3922 7443 3912 7455 3915 7535 3927 7535
      3951 7558 3953 7556 3948 7427
TIME...MOT...LOC 2206Z 273DEG 35KT 3948 7543 3926 7535 3916 7540 

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

$$

MLB

2 follow-up statements

883 
WWUS51 KPHI 292243
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
643 PM EDT Sat Jul 29 2023

NJC001-009-011-033-292315-
/O.CON.KPHI.SV.W.0259.000000T0000Z-230729T2315Z/
Atlantic NJ-Cumberland NJ-Salem NJ-Cape May NJ-
643 PM EDT Sat Jul 29 2023

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT
FOR SOUTHERN ATLANTIC...CUMBERLAND...SOUTHEASTERN SALEM AND CAPE MAY
COUNTIES...

At 643 PM EDT, severe thunderstorms were located along a line
extending from Vineland to Eldora to near Goshen, moving east at 40
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...
Vineland, Atlantic City, Millville, Ocean City, Cumberland,
Pleasantville, Somers Point, Ventnor City, Brigantine, Northfield,
Absecon, Margate City, Buena, Laurel Lake, Woodbine, Sea Isle City,
Estell Manor, Longport, Corbin City and Newport.

This includes the following highways...
 Garden State Parkway between mile markers 14 and 42.
 Atlantic City Expressway between mile markers 0 and 15.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3922 7443 3912 7455 3915 7524 3952 7511
      3948 7427
TIME...MOT...LOC 2243Z 273DEG 35KT 3946 7499 3924 7491 3914 7496 

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

$$

MLB

350 
WWUS51 KPHI 292256
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
656 PM EDT Sat Jul 29 2023

NJC011-033-292306-
/O.CAN.KPHI.SV.W.0259.000000T0000Z-230729T2315Z/
Cumberland NJ-Salem NJ-
656 PM EDT Sat Jul 29 2023

...THE SEVERE THUNDERSTORM WARNING FOR CUMBERLAND AND SOUTHEASTERN
SALEM COUNTIES IS CANCELLED...

The storms which prompted the warning have !moved out of the warned 
area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 900 PM EDT for
southern New Jersey.

LAT...LON 3922 7443 3912 7455 3914 7498 3919 7496
      3917 7492 3918 7491 3923 7492 3923 7490
      3931 7488 3932 7487 3941 7485 3943 7487
      3951 7484 3948 7427
TIME...MOT...LOC 2256Z 272DEG 36KT 3946 7469 3923 7475 3913 7480 

$$

NJC001-009-292315-
/O.CON.KPHI.SV.W.0259.000000T0000Z-230729T2315Z/
Atlantic NJ-Cape May NJ-
656 PM EDT Sat Jul 29 2023

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT
FOR SOUTHERN ATLANTIC AND CAPE MAY COUNTIES...

At 656 PM EDT, severe thunderstorms were located along a line
extending from Mays Landing to near Seaville to near Goshen, moving
east at 40 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...
Atlantic City, Ocean City, Pleasantville, Somers Point, Ventnor City,
Brigantine, Northfield, Absecon, Margate City, Woodbine, Sea Isle
City, Estell Manor, Longport, Corbin City, Beesleys Point, Seaville,
Dorothy, Dennisville, Strathmere and Eldora.

This includes the following highways...
 Garden State Parkway between mile markers 14 and 43.
 Atlantic City Expressway between mile markers 0 and 16.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Frequent cloud to ground lightning is occurring with this storm, and
the storm will affect the beaches. For your safety, immediately move
off the beach and seek shelter indoors.

&&

LAT...LON 3922 7443 3912 7455 3914 7498 3919 7496
      3917 7492 3918 7491 3923 7492 3923 7490
      3931 7488 3932 7487 3941 7485 3943 7487
      3951 7484 3948 7427
TIME...MOT...LOC 2256Z 272DEG 36KT 3946 7469 3923 7475 3913 7480 

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

$$

Staarmann

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 28, 8:04 PM EDT	Severe Thunderstorm Warning	PHI	Salem	41 min
Jul 28, 8:33 PM EDT	Special Weather Statement	PHI	Cumberland, Gloucester, Salem	42 min
Jul 28, 8:36 PM EDT	Special Marine Warning	PHI		54 min
Jul 28, 9:02 PM EDT	Special Weather Statement	PHI	Camden	43 min
Jul 28, 9:18 PM EDT	Special Weather Statement	PHI	Cape May, Cumberland, Salem	42 min
Jul 28, 9:32 PM EDT	Special Marine Warning	PHI		58 min
Jul 28, 9:44 PM EDT	Special Weather Statement	PHI	Burlington, Camden, Mercer, Middlesex	61 min
Jul 28, 10:00 PM EDT	Special Weather Statement	PHI	Atlantic, Cape May	45 min
Jul 28, 10:28 PM EDT	Special Marine Warning	PHI		62 min
Jul 28, 10:54 PM EDT	Special Weather Statement	PHI	Cumberland, Salem	36 min
Jul 28, 11:15 PM EDT	Special Weather Statement	PHI	Cape May	30 min
Jul 28, 11:26 PM EDT	Special Marine Warning	PHI		94 min
Jul 29, 12:43 AM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cape May, Cumberland	47 min
Jul 29, 12:55 AM EDT	Special Marine Warning	PHI		65 min
Jul 29, 4:55 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland, Gloucester, Salem	50 min
Jul 29, 5:05 PM EDT	Special Marine Warning	PHI		85 min
Jul 29, 5:38 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Camden, Cumberland, Gloucester, Salem	52 min
Jul 29, 5:44 PM EDT	Severe Thunderstorm Warning Considerable damage threat	PHI	Salem	46 min
Jul 29, 5:51 PM EDT	Special Marine Warning	PHI		114 min
Jul 29, 6:13 PM EDT	Special Weather Statement	PHI	Morris, Sussex	32 min
Jul 29, 6:13 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer, Middlesex, Monmouth, Somerset	47 min
Jul 29, 6:26 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester, Salem	49 min
Jul 29, 6:28 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Ocean	47 min
Jul 29, 6:33 PM EDT	Severe Thunderstorm Warning	PHI	Cape May	42 min
Jul 29, 6:41 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer, Middlesex, Monmouth, Somerset	49 min
Jul 29, 6:46 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester	44 min
Jul 29, 6:51 PM EDT	Special Marine Warning	PHI		54 min
Jul 29, 7:19 PM EDT	Special Marine Warning	PHI		56 min
Jul 29, 7:19 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth	26 min
Jul 29, 7:35 PM EDT	Special Weather Statement	PHI	Monmouth	70 min
Jul 29, 7:53 PM EDT	Special Marine Warning	PHI		97 min
Jul 29, 7:54 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Monmouth, Ocean	40 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.