Alert archive / New Jersey / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 253, NWS Philadelphia/Mount Holly

July 29, 2023Chester County, Delaware County, Pennsylvania; New Castle County, Delaware; Cumberland County, Gloucester County, Salem County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 29, 2023, 4:55 PM EDT for Chester County, Delaware County, Pennsylvania; New Castle County, Delaware; Cumberland County, Gloucester County, Salem County, New Jersey. It was in force for 50 min. 4 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, 4:55 PM EDT (20:55 UTC)
Expired: Jul 29, 2023, 5:45 PM EDT
In force: 50 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties New Castle County, DE, Cumberland County, NJ, Gloucester County, NJ, Salem County, NJ, Chester County, PA, Delaware County, PA

The radar

The Philadelphia radar (KDIX), 97 km from the middle of the area, began a volume at 20:55 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, 5:35 PM EDT	TSTM WND GST 42	Mannington Twp, NJ	NJWxNet gauge at Mannington Twp.
Jul 29, 5:38 PM EDT	TSTM WND DMG	1 Ssw Woodstown, NJ	Several trees and power lines down along Bailey Street and South Main Street in Woodstown. Time estimated from radar.
Jul 29, 5:38 PM EDT	TSTM WND DMG	Woodstown, NJ	Social media photo of several snapped power poles along South Main Street in Woodstown. Time estimated from radar.
Jul 29, 5:40 PM EDT	TSTM WND DMG	Woodstown, NJ	Multiple reports of trees and wires blown down across Salem County. Time and location 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

Washington/Dulle, VA (KIAD), launched 12:00Z, 8.9 hours before the alert went out and 185 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: 87 J/kg
Mixed-layer CIN: -147 J/kg
Mixed-layer LCL: 1163 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 50 m²/s²
0-3 km storm-relative helicity: 68 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

034 
WUUS51 KPHI 292055
SVRPHI
DEC003-NJC011-015-033-PAC029-045-292145-
/O.NEW.KPHI.SV.W.0253.230729T2055Z-230729T2145Z/

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

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Northern New Castle County in northern Delaware...
  North central Cumberland County in southern New Jersey...
  Central Salem County in southern New Jersey...
  Northwestern Gloucester County in southern New Jersey...
  South central Chester County in southeastern Pennsylvania...
  Southern Delaware County in southeastern Pennsylvania...

* Until 545 PM EDT.

* At 455 PM EDT, a severe thunderstorm was located over Pike Creek,
  or over Newark, moving east at 40 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...
  Wilmington, Newark, Chester, West Deptford, Pennsville, Carneys
  Point, Elsmere, Paulsboro, Kennett Square, New Castle, Penns Grove,
  Salem, Woodstown, Alloway, National Park, Swedesboro, Delaware
  City, Newport, Arden and Stanton.

This includes the following highways...
 New Jersey Turnpike between exits 1 and 2.
 Interstate 95 in Pennsylvania between mile markers 0 and 9.
 Interstate 95 in Delaware between mile markers 0 and 23.
 Interstate 295 in New Jersey between mile markers 0 and 22.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3983 7580 3988 7521 3987 7521 3988 7519
      3988 7517 3952 7519 3961 7578 3964 7579
      3972 7579 3972 7580
TIME...MOT...LOC 2055Z 271DEG 33KT 3971 7572 

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

$$

MLB

2 follow-up statements

946 
WWUS51 KPHI 292108
SVSPHI

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

PAC029-292118-
/O.CAN.KPHI.SV.W.0253.000000T0000Z-230729T2145Z/
Chester PA-
508 PM EDT Sat Jul 29 2023

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL CHESTER COUNTY
IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 900 PM EDT for
northern Delaware...southern New Jersey...and southeastern
Pennsylvania.

LAT...LON 3982 7568 3988 7523 3987 7521 3988 7520
      3988 7517 3952 7519 3960 7572 3979 7572
TIME...MOT...LOC 2108Z 271DEG 33KT 3971 7557 

$$

DEC003-NJC011-015-033-PAC045-292145-
/O.CON.KPHI.SV.W.0253.000000T0000Z-230729T2145Z/
New Castle DE-Cumberland NJ-Salem NJ-Gloucester NJ-Delaware PA-
508 PM EDT Sat Jul 29 2023

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR NORTHERN NEW CASTLE...NORTH CENTRAL CUMBERLAND...CENTRAL SALEM...
NORTHWESTERN GLOUCESTER AND SOUTHEASTERN DELAWARE COUNTIES...

At 508 PM EDT, a severe thunderstorm was located over Wilmington
Manor, or over Wilmington, moving east at 40 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...
Wilmington, Chester, West Deptford, Pennsville, Carneys Point,
Elsmere, Paulsboro, New Castle, Penns Grove, Salem, Woodstown,
Alloway, National Park, Swedesboro, Delaware City, Newport, Arden,
Stanton, Bear and Talleyville.

This includes the following highways...
 New Jersey Turnpike between exits 1 and 2.
 Interstate 95 in Pennsylvania between mile markers 0 and 6, and near
mile marker 11.
 Interstate 95 in Delaware between mile markers 4 and 23.
 Interstate 295 in New Jersey between mile markers 0 and 22.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3982 7568 3988 7523 3987 7521 3988 7520
      3988 7517 3952 7519 3960 7572 3979 7572
TIME...MOT...LOC 2108Z 271DEG 33KT 3971 7557 

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

$$

MLB

235 
WWUS51 KPHI 292131
SVSPHI

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

DEC003-PAC045-292141-
/O.CAN.KPHI.SV.W.0253.000000T0000Z-230729T2145Z/
New Castle DE-Delaware PA-
531 PM EDT Sat Jul 29 2023

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN NEW CASTLE AND
SOUTHEASTERN DELAWARE COUNTIES IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

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

LAT...LON 3964 7560 3966 7556 3969 7553 3972 7552
      3973 7553 3971 7548 3977 7546 3983 7518
      3952 7519 3958 7558 3957 7558 3962 7562
TIME...MOT...LOC 2131Z 271DEG 33KT 3971 7529 

$$

NJC011-015-033-292145-
/O.CON.KPHI.SV.W.0253.000000T0000Z-230729T2145Z/
Cumberland NJ-Salem NJ-Gloucester NJ-
531 PM EDT Sat Jul 29 2023

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR NORTH CENTRAL CUMBERLAND...CENTRAL SALEM AND NORTHWESTERN
GLOUCESTER COUNTIES...

At 531 PM EDT, a severe thunderstorm was located over Swedesboro, or
12 miles east of Wilmington, moving east at 40 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...
Wilmington, Pennsville, Carneys Point, New Castle, Penns Grove,
Salem, Woodstown, Alloway, Swedesboro, Beckett, Mullica Hill and
Delaware Memorial Bridge.

This includes the following highways...
 New Jersey Turnpike between exits 1 and 2.
 Interstate 295 in New Jersey between mile markers 0 and 14.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3964 7560 3966 7556 3969 7553 3972 7552
      3973 7553 3971 7548 3977 7546 3983 7518
      3952 7519 3958 7558 3957 7558 3962 7562
TIME...MOT...LOC 2131Z 271DEG 33KT 3971 7529 

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

$$

MLB

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	Chester, Delaware	41 min
Jul 28, 8:24 PM EDT	Special Weather Statement	PHI	Delaware, Montgomery	51 min
Jul 28, 9:02 PM EDT	Special Weather Statement	PHI	Bucks, Montgomery, Philadelphia	43 min
Jul 29, 6:13 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	47 min
Jul 29, 6:26 PM EDT	Severe Thunderstorm Warning	PHI	Delaware, Philadelphia	49 min
Jul 29, 6:36 PM EDT	Special Weather Statement	PHI	Chester, Delaware	24 min
Jul 29, 6:41 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	49 min
Jul 29, 6:46 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	44 min
Jul 28, 8:33 PM EDT	Special Weather Statement	PHI	New Castle	42 min
Jul 28, 10:07 PM EDT	Severe Thunderstorm Warning	PHI	Kent, New Castle	38 min
Jul 28, 10:44 PM EDT	Severe Thunderstorm Warning	PHI	Kent, New Castle	31 min
Jul 28, 11:00 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Sussex	60 min
Jul 28, 11:33 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Sussex	27 min
Jul 28, 11:59 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	31 min
Jul 29, 12:12 AM EDT	Severe Thunderstorm Warning	PHI	Kent, Sussex	36 min
Jul 29, 5:00 PM EDT	Severe Thunderstorm Warning Considerable damage threat	PHI	Kent, New Castle	60 min
Jul 29, 5:44 PM EDT	Severe Thunderstorm Warning Considerable damage threat	PHI	Kent, New Castle	46 min
Jul 29, 6:00 PM EDT	Severe Thunderstorm Warning Considerable damage threat	PHI	Kent, Sussex	75 min
Jul 29, 6:18 PM EDT	Tornado Warning	PHI	Sussex	27 min
Jul 28, 8:36 PM EDT	Special Marine Warning	PHI		54 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, 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, 5:51 PM EDT	Special Marine Warning	PHI		114 min
Jul 29, 6:07 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cape May, Cumberland, Salem	68 min
Jul 29, 6:13 PM EDT	Special Weather Statement	PHI	Morris, Sussex	32 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, 6:51 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 Severe Thunderstorm Warnings in Pennsylvania, 2023 Severe Thunderstorm Warnings in Delaware, 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.