Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2024

Severe Thunderstorm Warning 119, NWS Philadelphia/Mount Holly

July 14, 2024Bucks County, Pennsylvania; Burlington County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 14, 2024, 4:22 PM EDT for Bucks County, Pennsylvania; Burlington County, New Jersey. It was in force for 32 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: Jul 14, 2024, 4:22 PM EDT (20:22 UTC)
Expired: Jul 14, 2024, 4:54 PM EDT
In force: 32 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Damage threat: Considerable
Hail: 0.75 in
Wind: 70.0 mph

Counties Burlington County, NJ, Bucks County, PA

The radar

The Philadelphia radar (KDIX), 25 km from the middle of the area, began a volume at 20:22 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 14, 4:22 PM EDT	TSTM WND DMG	Moorestown Twp, NJ	Wires down near Moorestown and Maple Shade. Time estimated from radar.
Jul 14, 4:30 PM EDT	TSTM WND DMG	1 Nw Cooperstown, NJ	Several wires down in Edgewater Park. Time estimated from radar.
Jul 14, 4:45 PM EDT	TSTM WND GST 47	Moorestown, NJ	Corrects previous tstm wnd gst report time from Moorestown. 47 mph thunderstorm wind gust at the Moorestown NJWxNet station.

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

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 8.4 hours before the alert went out and 182 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: 23 J/kg
Mixed-layer CIN: -154 J/kg
Mixed-layer LCL: 1421 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 13 m²/s²
0-3 km storm-relative helicity: 43 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

341 
WUUS51 KPHI 142022
SVRPHI
NJC005-PAC017-142115-
/O.NEW.KPHI.SV.W.0119.240714T2022Z-240714T2115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
422 PM EDT Sun Jul 14 2024

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Northern Burlington County in southern New Jersey...
  Southeastern Bucks County in southeastern Pennsylvania...

* Until 515 PM EDT.

* At 421 PM EDT, a severe thunderstorm was located over Willingboro,
  or 11 miles east of Philadelphia, moving east at 20 mph.

  HAZARD...70 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

  IMPACT...Expect considerable tree damage. Damage is likely to 
           mobile homes, roofs, and outbuildings.

* Locations impacted include...
  Willingboro, Lumberton, Burlington, Bristol, Mount Holly,
  Riverside, Presidential Lakes Estates, Beverly, Pemberton,
  Wrightstown, Jacksonville, Georgetown, Presidential Lakes,
  Andalusia, Browns Mills, Jobstown, Columbus, Florence-Roebling,
  Leisuretowne, and Edgewater Park.

This includes the following highways...
 New Jersey Turnpike between exits 5 and 7.
 Interstate 95 in Pennsylvania between mile markers 34 and 36.
 Interstate 295 in New Jersey between mile markers 39 and 55.

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 this storm. Move indoors immediately. 
Remember, if you can hear thunder, you are close enough to be struck 
by lightning.

&&

LAT...LON 3988 7452 3996 7500 4008 7497 4014 7459
      4012 7458
TIME...MOT...LOC 2021Z 274DEG 18KT 4003 7492 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH

$$

Gorse

2 follow-up statements

279 
WWUS51 KPHI 142038
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
438 PM EDT Sun Jul 14 2024

PAC017-142047-
/O.CAN.KPHI.SV.W.0119.000000T0000Z-240714T2115Z/
Bucks PA-
438 PM EDT Sun Jul 14 2024

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN BUCKS COUNTY IS
CANCELLED...

The severe thunderstorm which prompted the warning is moving out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 3988 7452 3996 7500 4006 7496 4007 7494
      4008 7487 4010 7485 4014 7459 4012 7458
TIME...MOT...LOC 2037Z 275DEG 26KT 4001 7481 

$$

NJC005-142115-
/O.CON.KPHI.SV.W.0119.000000T0000Z-240714T2115Z/
Burlington NJ-
438 PM EDT Sun Jul 14 2024

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR NORTHERN BURLINGTON COUNTY...

At 437 PM EDT, a severe thunderstorm was located over Mount Holly, or
15 miles south of Trenton, moving east at 30 mph.

HAZARD...60 mph wind gusts and penny size hail. The strongest winds 
         may occur before any rain.

SOURCE...Radar indicated.

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

Locations impacted include...
Willingboro, Lumberton, Burlington, Bristol, Mount Holly, Riverside,
Presidential Lakes Estates, Beverly, Pemberton, Wrightstown,
Jacksonville, Georgetown, Presidential Lakes, Browns Mills, Jobstown,
Columbus, Florence-Roebling, Leisuretowne, Edgewater Park, and
Delanco.

This includes the following highways...
 New Jersey Turnpike between exits 5 and 7.
 Interstate 295 in New Jersey between mile markers 39 and 55.

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. Move
indoors immediately. Lightning is one of nature's leading killers.
Remember, if you can hear thunder, you are close enough to be struck
by lightning.

&&

LAT...LON 3988 7452 3996 7500 4006 7496 4007 7494
      4008 7487 4010 7485 4014 7459 4012 7458
TIME...MOT...LOC 2037Z 275DEG 26KT 4001 7481 

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

$$

Gorse

901 
WWUS51 KPHI 142054
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
454 PM EDT Sun Jul 14 2024

NJC005-142104-
/O.CAN.KPHI.SV.W.0119.000000T0000Z-240714T2115Z/
Burlington NJ-
454 PM EDT Sun Jul 14 2024

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN BURLINGTON COUNTY IS
CANCELLED...

The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been cancelled.  However gusty winds are still possible with this
thunderstorm.

LAT...LON 3988 7452 3996 7500 4006 7496 4007 7494
      4008 7487 4010 7485 4014 7459 4012 7458
TIME...MOT...LOC 2054Z 274DEG 18KT 4000 7469 

$$

Hoeflich

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 14, 12:07 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Lehigh	38 min
Jul 14, 12:44 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Lehigh, Montgomery	46 min
Jul 14, 1:23 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery	52 min
Jul 14, 2:19 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Montgomery	41 min
Jul 14, 2:24 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery, Philadelphia	23 min
Jul 14, 2:52 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware, Montgomery	38 min
Jul 14, 2:53 PM EDT	Flash Flood Warning	PHI	Chester	3 hr
Jul 14, 3:03 PM EDT	Excessive Heat Warning	PHI	Berks, Bucks, Chester, Delaware, Lehigh, Montgomery and 2 more	3 days
Jul 14, 3:03 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware	42 min
Jul 14, 3:35 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware	40 min
Jul 14, 3:44 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery, Philadelphia	46 min
Jul 14, 4:13 PM EDT	Severe Thunderstorm Warning	PHI	Delaware, Philadelphia	47 min
Jul 14, 2:31 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex	33 min
Jul 14, 3:51 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth, Ocean	39 min
Jul 14, 4:24 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth, Ocean	51 min
Jul 14, 4:27 PM EDT	Special Marine Warning	PHI		49 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.