Alert archive / New Jersey / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 172, NWS Philadelphia/Mount Holly

July 5, 2023Camden County, Gloucester County, New Jersey; Delaware County, Philadelphia County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 5, 2023, 5:26 PM EDT for Camden County, Gloucester County, New Jersey; Delaware County, Philadelphia County, Pennsylvania. It was in force for 34 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: Jul 5, 2023, 5:26 PM EDT (21:26 UTC)
Expired: Jul 5, 2023, 6:00 PM EDT
In force: 34 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Camden County, NJ, Gloucester County, NJ, Delaware County, PA, Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 69 km from the middle of the area, began a volume at 21:28 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 5, 6:10 PM EDT	TSTM WND GST 57	2 Se South Philadelphia, PA	weatherflow site at south 19th street measured 57 mph gust at 6:10 PM.

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

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 9.4 hours before the alert went out and 217 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: 275 J/kg
Mixed-layer CIN: -58 J/kg
Mixed-layer LCL: 1031 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: -1 m²/s²
0-3 km storm-relative helicity: 26 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

518 
WUUS51 KPHI 052126
SVRPHI
NJC007-015-PAC045-101-052200-
/O.NEW.KPHI.SV.W.0172.230705T2126Z-230705T2200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
526 PM EDT Wed Jul 5 2023

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Northwestern Camden County in southern New Jersey...
  North central Gloucester County in southern New Jersey...
  Southwestern Philadelphia County in southeastern Pennsylvania...
  East central Delaware County in southeastern Pennsylvania...

* Until 600 PM EDT.

* At 525 PM EDT, a severe thunderstorm was located over South
  Philadelphia, or near Gloucester City, moving southeast at 5 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Damage to roofs, siding, trees, and power lines is 
           possible.

* Locations impacted include...
  Philadelphia, Camden, Gloucester City, West Deptford, Yeadon,
  Folcroft, Paulsboro, Westville, National Park, East Lansdowne,
  Brooklawn, Audubon Park, Darby Township, Morris Park, Center City,
  South Philadelphia, Ben Franklin Bridge, Kensington, Roxborough and
  Philadelphia International Airport.

This includes the following highways...
 Interstate 95 in Pennsylvania between mile markers 11 and 23.
 Interstate 76 in Pennsylvania between mile markers 340 and 351.
 Interstate 76 in New Jersey between mile markers 1 and 3.
 Interstate 295 in New Jersey between mile markers 18 and 24.
 Interstate 676 in Pennsylvania between mile markers 0 and 1.
 Interstate 676 in New Jersey between mile markers 0 and 4.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3996 7530 4002 7518 3992 7504 3980 7525
TIME...MOT...LOC 2125Z 320DEG 5KT 3992 7520 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Fitzsimmons

1 follow-up statement

690 
WWUS51 KPHI 052159
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
559 PM EDT Wed Jul 5 2023

NJC007-015-PAC045-101-052208-
/O.EXP.KPHI.SV.W.0172.000000T0000Z-230705T2200Z/
Camden NJ-Gloucester NJ-Philadelphia PA-Delaware PA-
559 PM EDT Wed Jul 5 2023

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN CAMDEN...NORTH
CENTRAL GLOUCESTER...SOUTHWESTERN PHILADELPHIA AND EAST CENTRAL
DELAWARE COUNTIES WILL EXPIRE AT 600 PM EDT...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Mount Holly NJ.

Remember, a Severe Thunderstorm Warning still remains in effect for 
Camden, Gloucester, Philadelphia, and Delaware Counties until 6:30 
PM EDT.

LAT...LON 3996 7530 4002 7518 3992 7504 3980 7525
TIME...MOT...LOC 2158Z 320DEG 5KT 3989 7516 

$$

MLB

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 4, 8:41 PM EDT	Coastal Flood Advisory	PHI	Atlantic, Burlington, Cape May, Cumberland, Monmouth, Ocean	7 hr
Jul 4, 10:15 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden	3 hr
Jul 5, 3:21 AM EDT	Coastal Flood Advisory	PHI	Atlantic, Burlington, Cape May, Cumberland, Monmouth, Ocean	24 hr
Jul 5, 1:37 PM EDT	Special Weather Statement	PHI	Ocean	23 min
Jul 5, 5:57 PM EDT	Severe Thunderstorm Warning	PHI	Camden, Gloucester	33 min
Jul 5, 6:12 PM EDT	Areal Flood Advisory	PHI	Camden, Gloucester	4 hr
Jul 5, 6:30 PM EDT	Severe Thunderstorm Warning	PHI	Gloucester	30 min
Jul 5, 5:22 PM EDT	Areal Flood Advisory	PHI	Delaware, Philadelphia	3 hr
Jul 5, 5:45 PM EDT	Flash Flood Warning	PHI	Delaware, Philadelphia	107 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2023 Severe Thunderstorm Warnings in Pennsylvania, 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.