Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2024

Severe Thunderstorm Warning 83, NWS Philadelphia/Mount Holly

June 30, 2024Burlington County, Camden County, Gloucester County, New Jersey; 5 counties in Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 30, 2024, 4:25 PM EDT for Burlington County, Camden County, Gloucester County, New Jersey; 5 counties in Pennsylvania. It was in force for 50 min. 3 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: Jun 30, 2024, 4:25 PM EDT (20:25 UTC)
Expired: Jun 30, 2024, 5:15 PM EDT
In force: 50 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Burlington County, NJ, Camden County, NJ, Gloucester County, NJ, Bucks County, PA, Chester County, PA, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 53 km from the middle of the area, began a volume at 20:26 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
Jun 30, 4:38 PM EDT	TSTM WND DMG	1 S Manayunk, PA	Fallen tree. Right lane blocked in Lower Merion on I-76 EB approaching City Ave/Exit 339. Time estimated from radar.
Jun 30, 5:00 PM EDT	TSTM WND GST 44	1 Ssw Palmyra, NJ	NJWXNET Station NJ71 Pennsauken.
Jun 30, 5:25 PM EDT	TSTM WND GST 61	2 Sw Marlton, NJ

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
Jun 30, 11:09 AM EDT	Severe Thunderstorm Watch	SPC	10 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 8.4 hours before the alert went out and 200 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: 856 J/kg
Mixed-layer CIN: -133 J/kg
Mixed-layer LCL: 1165 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 79 m²/s²
0-3 km storm-relative helicity: 66 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

As transmitted.

973 
WUUS51 KPHI 302025
SVRPHI
NJC005-007-015-PAC017-029-045-091-101-302115-
/O.NEW.KPHI.SV.W.0083.240630T2025Z-240630T2115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
425 PM EDT Sun Jun 30 2024

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...
  Northwestern Burlington County in southern New Jersey...
  Southeastern Montgomery County in southeastern Pennsylvania...
  Southern Bucks County in southeastern Pennsylvania...
  East central Chester County in southeastern Pennsylvania...
  Philadelphia County in southeastern Pennsylvania...
  Delaware County in southeastern Pennsylvania...

* Until 515 PM EDT.

* At 424 PM EDT, severe thunderstorms were located along a line
  extending from Souderton to Norristown to near Gradyville, moving
  southeast at 35 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Philadelphia, Trenton, Camden, Gloucester City, Cherry Hill,
  Bensalem, Evesham, Mount Laurel, Ewing, Norristown, Chester,
  Willingboro, Deptford, Voorhees, West Deptford, Lindenwold,
  Lansdale, West Norriton, East Norriton, and Lumberton.

This includes the following highways...
 New Jersey Turnpike between exits 3 and 6A.
 Pennsylvania Turnpike between mile markers 321 and 359.
 Northeast Extension between mile markers 21 and 33.
 Interstate 95 in Pennsylvania between mile markers 6 and 40.
 Interstate 76 in Pennsylvania between mile markers 327 and 351.
 Interstate 76 in New Jersey between mile markers 0 and 3.
 Interstate 295 in New Jersey between mile markers 18 and 57.
 Interstate 676 in Pennsylvania between mile markers 0 and 1.
 Interstate 676 in New Jersey between mile markers 0 and 4.
 Interstate 476 in Pennsylvania between mile markers 0 and 19.
 Atlantic City Expressway between mile markers 43 and 44.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3992 7481 3973 7507 3991 7546 4002 7560
      4014 7540 4035 7536 4028 7486 4024 7483
      4022 7477 4015 7472 4018 7469 4017 7468
TIME...MOT...LOC 2024Z 298DEG 31KT 4032 7530 4012 7534 3998 7551 

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

$$

Hoeflich

4 follow-up statements

530 
WWUS51 KPHI 302037
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
437 PM EDT Sun Jun 30 2024

PAC029-302046-
/O.CAN.KPHI.SV.W.0083.000000T0000Z-240630T2115Z/
Chester PA-
437 PM EDT Sun Jun 30 2024

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL CHESTER COUNTY 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 700 PM EDT for
southern New Jersey...and southeastern Pennsylvania.

LAT...LON 3993 7481 3973 7507 3990 7545 3994 7549
      3998 7546 3998 7544 3999 7544 4003 7540
      4005 7540 4007 7536 4007 7538 4024 7524
      4008 7473
TIME...MOT...LOC 2036Z 297DEG 31KT 4017 7525 4008 7524 3994 7541 

$$

NJC005-007-015-PAC017-045-091-101-302115-
/O.CON.KPHI.SV.W.0083.000000T0000Z-240630T2115Z/
Camden NJ-Gloucester NJ-Burlington NJ-Montgomery PA-Bucks PA-
Philadelphia PA-Delaware PA-
437 PM EDT Sun Jun 30 2024

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR NORTHWESTERN CAMDEN...NORTH CENTRAL GLOUCESTER...NORTHWESTERN
BURLINGTON...SOUTHEASTERN MONTGOMERY...SOUTH CENTRAL BUCKS...
PHILADELPHIA AND DELAWARE COUNTIES...

At 436 PM EDT, severe thunderstorms were located along a line
extending from Ambler to Chestnut Hill to near Lima, moving southeast
at 35 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, Cherry Hill, Bensalem,
Evesham, Mount Laurel, Norristown, Chester, Willingboro, Deptford,
Voorhees, West Deptford, Lindenwold, East Norriton, Lumberton,
Bellmawr, Yeadon, Woodbury, and Burlington.

This includes the following highways...
 New Jersey Turnpike between exits 3 and 5.
 Pennsylvania Turnpike between mile markers 329 and 356.
 Northeast Extension between mile markers 21 and 23.
 Interstate 95 in Pennsylvania between mile markers 6 and 40.
 Interstate 76 in Pennsylvania between mile markers 329 and 351.
 Interstate 76 in New Jersey between mile markers 0 and 3.
 Interstate 295 in New Jersey between mile markers 18 and 52.
 Interstate 676 in Pennsylvania between mile markers 0 and 1.
 Interstate 676 in New Jersey between mile markers 0 and 4.
 Interstate 476 in Pennsylvania between mile markers 0 and 19.
 Atlantic City Expressway between mile markers 43 and 44.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3993 7481 3973 7507 3990 7545 3994 7549
      3998 7546 3998 7544 3999 7544 4003 7540
      4005 7540 4007 7536 4007 7538 4024 7524
      4008 7473
TIME...MOT...LOC 2036Z 297DEG 31KT 4017 7525 4008 7524 3994 7541 

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

$$

Hoeflich

748 
WWUS51 KPHI 302043
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
443 PM EDT Sun Jun 30 2024

NJC005-007-015-PAC017-045-091-101-302115-
/O.CON.KPHI.SV.W.0083.000000T0000Z-240630T2115Z/
Camden NJ-Gloucester NJ-Burlington NJ-Montgomery PA-Bucks PA-
Philadelphia PA-Delaware PA-
443 PM EDT Sun Jun 30 2024

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR NORTHWESTERN CAMDEN...NORTH CENTRAL GLOUCESTER...NORTHWESTERN
BURLINGTON...SOUTHEASTERN MONTGOMERY...SOUTH CENTRAL BUCKS...
PHILADELPHIA AND EASTERN DELAWARE COUNTIES...

At 443 PM EDT, severe thunderstorms were located along a line
extending from Ambler to Germantown to Swarthmore, moving southeast
at 35 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, Cherry Hill, Bensalem,
Evesham, Mount Laurel, Chester, Willingboro, Deptford, Voorhees, West
Deptford, Lindenwold, Lumberton, Bellmawr, Yeadon, Woodbury,
Burlington, Bristol, and Mount Holly.

This includes the following highways...
 New Jersey Turnpike between exits 3 and 5.
 Pennsylvania Turnpike between mile markers 337 and 355.
 Interstate 95 in Pennsylvania between mile markers 6 and 40.
 Interstate 76 in Pennsylvania between mile markers 335 and 351.
 Interstate 76 in New Jersey between mile markers 0 and 3.
 Interstate 295 in New Jersey between mile markers 18 and 52.
 Interstate 676 in Pennsylvania between mile markers 0 and 1.
 Interstate 676 in New Jersey between mile markers 0 and 4.
 Interstate 476 in Pennsylvania between mile markers 0 and 10.
 Atlantic City Expressway between mile markers 43 and 44.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Intense thunderstorm lines can produce brief tornadoes and widespread
significant wind damage. Although a tornado is not immediately
likely, it is best to move to an interior room on the lowest floor of
a building. These storms may cause serious injury and significant
property damage.

&&

LAT...LON 3991 7546 4008 7525 4019 7520 4021 7518
      4012 7486 4008 7473 3993 7481 3973 7507
TIME...MOT...LOC 2043Z 298DEG 31KT 4015 7520 4006 7519 3992 7536 

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

$$

Hoeflich

050 
WWUS51 KPHI 302059
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
459 PM EDT Sun Jun 30 2024

PAC045-302108-
/O.CAN.KPHI.SV.W.0083.000000T0000Z-240630T2115Z/
Delaware PA-
459 PM EDT Sun Jun 30 2024

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN DELAWARE COUNTY 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 700 PM EDT for
southern New Jersey...and southeastern Pennsylvania.

LAT...LON 3994 7481 3973 7507 3985 7533 3985 7525
      3987 7521 3987 7526 3989 7526 3992 7525
      4003 7512 4019 7513 4012 7484 4008 7473
TIME...MOT...LOC 2058Z 298DEG 31KT 4009 7506 4000 7506 3986 7523 

$$

NJC005-007-015-PAC017-091-101-302115-
/O.CON.KPHI.SV.W.0083.000000T0000Z-240630T2115Z/
Camden NJ-Gloucester NJ-Burlington NJ-Montgomery PA-Bucks PA-
Philadelphia PA-
459 PM EDT Sun Jun 30 2024

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR NORTHWESTERN CAMDEN...NORTH CENTRAL GLOUCESTER...NORTHWESTERN
BURLINGTON...EAST CENTRAL MONTGOMERY...SOUTH CENTRAL BUCKS AND
PHILADELPHIA COUNTIES...

At 458 PM EDT, severe thunderstorms were located along a line
extending from Rockledge to Palmyra to Paulsboro, moving southeast at
35 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, Cherry Hill, Bensalem,
Evesham, Mount Laurel, Willingboro, Deptford, Voorhees, West
Deptford, Lindenwold, Lumberton, Bellmawr, Yeadon, Woodbury,
Burlington, Bristol, Mount Holly, and Riverside.

This includes the following highways...
 New Jersey Turnpike between exits 3 and 6A.
 Pennsylvania Turnpike between mile markers 343 and 357.
 Interstate 95 in Pennsylvania between mile markers 11 and 40.
 Interstate 76 in Pennsylvania between mile markers 344 and 351.
 Interstate 76 in New Jersey between mile markers 0 and 3.
 Interstate 295 in New Jersey between mile markers 18 and 52.
 Interstate 676 in Pennsylvania between mile markers 0 and 1.
 Interstate 676 in New Jersey between mile markers 0 and 4.
 Atlantic City Expressway between mile markers 43 and 44.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Intense thunderstorm lines can produce brief tornadoes and widespread
significant wind damage. Although a tornado is not immediately
likely, it is best to move to an interior room on the lowest floor of
a building. These storms may cause serious injury and significant
property damage.

&&

LAT...LON 3994 7481 3973 7507 3985 7533 3985 7525
      3987 7521 3987 7526 3989 7526 3992 7525
      4003 7512 4019 7513 4012 7484 4008 7473
TIME...MOT...LOC 2058Z 298DEG 31KT 4009 7506 4000 7506 3986 7523 

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

$$

Hoeflich

982 
WWUS51 KPHI 302111
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
511 PM EDT Sun Jun 30 2024

NJC005-007-015-PAC017-091-101-302121-
/O.EXP.KPHI.SV.W.0083.000000T0000Z-240630T2115Z/
Camden NJ-Gloucester NJ-Burlington NJ-Montgomery PA-Bucks PA-
Philadelphia PA-
511 PM EDT Sun Jun 30 2024

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN CAMDEN...NORTH
CENTRAL GLOUCESTER...NORTHWESTERN BURLINGTON...EAST CENTRAL
MONTGOMERY...SOUTH CENTRAL BUCKS AND PHILADELPHIA COUNTIES WILL
EXPIRE AT 515 PM EDT...

The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire.  However gusty
winds are still possible with these thunderstorms.

A Severe Thunderstorm Watch remains in effect until 700 PM EDT for
southern New Jersey...and southeastern Pennsylvania.

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

A new Severe Thunderstorm Warning was issued for portions of 
Burlington County and Camden County. Refer to that bulletin for the 
updated information. 

LAT...LON 3994 7481 3973 7507 3985 7533 3985 7525
      3987 7521 3987 7526 3989 7526 3992 7525
      4003 7512 4019 7513 4012 7484 4008 7473
TIME...MOT...LOC 2111Z 298DEG 31KT 4004 7494 3995 7494 3981 7511 

$$

Hoeflich

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 30, 7:23 AM EDT	Flash Flood Warning	PHI	Atlantic, Cape May, Cumberland	4 hr
Jun 30, 8:00 AM EDT	Special Marine Warning	PHI		49 min
Jun 30, 1:57 PM EDT	Severe Thunderstorm Warning	PHI	Sussex, Warren	48 min
Jun 30, 2:10 PM EDT	Severe Thunderstorm Warning	PHI	Morris, Sussex, Warren	50 min
Jun 30, 2:42 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Somerset, Sussex, Warren	63 min
Jun 30, 3:16 PM EDT	Small Craft Advisory	PHI		21 hr
Jun 30, 3:26 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Somerset, Warren	49 min
Jun 30, 4:10 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Middlesex, Morris, Somerset	35 min
Jun 30, 4:37 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer	53 min
Jun 30, 4:44 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Middlesex, Morris, Somerset	31 min
Jun 30, 4:53 PM EDT	Flash Flood Warning	PHI	Hunterdon, Middlesex, Morris, Somerset	3 hr
Jun 30, 5:09 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden	51 min
Jun 30, 5:11 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Middlesex, Somerset	49 min
Jun 30, 5:20 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth	25 min
Jun 30, 5:26 PM EDT	Special Marine Warning	PHI		34 min
Jun 30, 5:51 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester, Salem	39 min
Jun 30, 5:54 PM EDT	Flash Flood Warning	PHI	Burlington, Camden, Gloucester	3 hr
Jun 30, 5:55 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex, Monmouth, Somerset	50 min
Jun 30, 6:06 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Cumberland, Gloucester, Salem	39 min
Jun 30, 6:17 PM EDT	Special Marine Warning	PHI		58 min
Jun 30, 6:26 PM EDT	Special Marine Warning	PHI		64 min
Jun 30, 6:35 PM EDT	Severe Thunderstorm Warning	PHI	Camden, Gloucester, Salem	40 min
Jun 30, 6:40 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Ocean	65 min
Jun 30, 6:42 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex, Monmouth	48 min
Jun 30, 6:44 PM EDT	Special Marine Warning	PHI		2 hr
Jun 30, 6:49 PM EDT	Special Marine Warning	PHI		83 min
Jun 30, 7:00 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland	45 min
Jun 30, 7:31 PM EDT	Severe Thunderstorm Warning	PHI	Salem	44 min
Jun 30, 7:34 PM EDT	Special Marine Warning	PHI		27 min
Jun 30, 7:37 PM EDT	Special Marine Warning	PHI		53 min
Jun 30, 7:43 PM EDT	Severe Thunderstorm Warning	PHI	Cape May, Cumberland	24 min
Jun 30, 7:56 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Camden, Cumberland, Gloucester, Salem	49 min
Jun 29, 8:22 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery	53 min
Jun 29, 10:23 PM EDT	Flash Flood Warning	PHI	Chester	4 hr
Jun 30, 1:18 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	42 min
Jun 30, 2:45 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Lehigh, Monroe, Northampton	45 min
Jun 30, 3:01 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Montgomery	59 min
Jun 30, 3:46 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Lehigh, Montgomery	44 min
Jun 30, 3:52 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Delaware, Montgomery	38 min
Jun 30, 4:54 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Montgomery	51 min
Jun 30, 5:19 PM EDT	Flash Flood Warning	PHI	Chester, Delaware, Philadelphia	3 hr
Jun 30, 5:20 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware	40 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2024 Severe Thunderstorm Warnings in New Jersey, 2024 Every severe thunderstorm warning in 2024

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.