Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2024

Severe Thunderstorm Warning 30, NWS Philadelphia/Mount Holly

June 14, 20244 counties in New Jersey; 5 counties in Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 14, 2024, 5:37 PM EDT for 4 counties in New Jersey; 5 counties in Pennsylvania. It was in force for 38 min. 23 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 14, 2024, 5:37 PM EDT (21:37 UTC)
Expired: Jun 14, 2024, 6:15 PM EDT
In force: 38 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, Hunterdon County, NJ, Mercer County, NJ, Bucks County, PA, Chester County, PA, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 49 km from the middle of the area, began a volume at 21:39 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 14, 5:42 PM EDT	TSTM WND DMG	1 Ne Bordentown, NJ	Report of numerous tree limbs down on US Route 130 north of Bordentown. There are road closures in the area. Time estimated from radar.
Jun 14, 5:42 PM EDT	TSTM WND DMG	1 Ssw Gladwyne, PA	Trees down in Lower Merion Township, PA. Time estimated from radar.
Jun 14, 5:42 PM EDT	TSTM WND DMG	2 Sw Yardville, NJ	Utility Pole Down on US 130 northbound South of NJ 156 (Bordentown Twp). All lanes closed. Time estimated from radar.
Jun 14, 5:42 PM EDT	HAIL 0.5	Rockledge, PA	Report from mPING: Half-inch (0.50 in.).
Jun 14, 5:45 PM EDT	TSTM WND GST 54	Burlington, NJ	Trained spotter measured wind gust.
Jun 14, 5:46 PM EDT	HAIL 0.25	Bordentown, NJ	Strong winds and heavy rain occurring as well.
Jun 14, 5:47 PM EDT	TSTM WND DMG	1 Nnw Yardville, NJ	Downed tree on I-195 eastbound West of Exit 3 - Hamilton Square-Yardville Rd (Hamilton Twp). 1 Right lane of 2 lanes closed. Time estimated from radar.
Jun 14, 5:47 PM EDT	TSTM WND DMG	1 Ssw Somerton, PA	Picture of trees down in the Somerton section of Philadelphia. Time estimated from radar.
Jun 14, 5:50 PM EDT	TSTM WND GST 45	Hamilton Square, NJ	Trained spotter estimates 45 mph wind gusts. Time estimated from radar.
Jun 14, 5:53 PM EDT	TSTM WND GST 44	Trenton Mercer Airport, NJ	ASOS station KTTN Trenton.
Jun 14, 5:53 PM EDT	TSTM WND GST 44	Trenton Mercer Airport, NJ	Updates previous tstm wnd gst report from Trenton Mercer Airport. ASOS station KTTN Trenton.
Jun 14, 5:55 PM EDT	TSTM WND GST 42	2 Nne Pennington, NJ	Mesonet station NJ64 Hopewell Twp.
Jun 14, 5:56 PM EDT	TSTM WND DMG	1 Wsw Lawrence Twp, NJ	Photos showing 2 flipped over portable toilets, minor structural damage, and tree limbs down near a school. Time estimated from radar.
Jun 14, 5:58 PM EDT	TSTM WND DMG	1 E Andalusia, PA	Downed tree on I-95 southbound near the train station parking lot (exit 35). Time estimated from radar.
Jun 14, 5:59 PM EDT	TSTM WND GST 46	Trenton Mercer Airport, NJ	Updates previous tstm wnd gst report from Trenton Mercer Airport. ASOS station KTTN Trenton.
Jun 14, 6:00 PM EDT	TSTM WND DMG	2 Sse Lawrence Twp, NJ	The Fortis Institute building across the highway from where a landspout tornado occurred off of Magnetic Drive had 3 HVAC units displaced on the roof as well as an array of solar panels damaged. This was determined to have been caused by straight line winds an
Jun 14, 6:01 PM EDT	TSTM WND DMG	1 Ese Bensalem, PA	Reports of numerous trees and power lines down across eastern Bensalem. Numerous power outages as well. Time estimated.
Jun 14, 6:01 PM EDT	TSTM WND DMG	Croydon, PA	Trees reported down in Croydon. Time estimated from radar.
Jun 14, 6:04 PM EDT	TSTM WND DMG	1 S Burlington, NJ	Photo relayed of a tree fallen onto a house at Wood Street and W 8th Street in Burlington. Time estimated from radar.
Jun 14, 6:04 PM EDT	TSTM WND DMG	1 W Bristol, PA	Tractor trailer flipped over, numerous trees down, and hundreds of power outages near and south/west of Bristol. Much of the damage is centered around the intersections of US Route 13 and Route 413. This damage was caused by a macroburst. Time estimated from r
Jun 14, 6:05 PM EDT	TSTM WND DMG	1 Nw Bristol, PA	Several large tree limbs down near Bristol. Time estimated from radar.
Jun 14, 6:06 PM EDT	TSTM WND DMG	Bristol, PA	Emergency manager reports numerous trees and power lines down across Bristol. Time estimated.
Jun 14, 6:17 PM EDT	TSTM WND GST 48	Northeast Philadelphia, PA	ASOS station KPNE Philadelphia Northeast.

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 14, 4:57 PM EDT	Severe Thunderstorm Watch	SPC	3 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 9.6 hours before the alert went out and 176 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: 61 J/kg
Mixed-layer CIN: -132 J/kg
Mixed-layer LCL: 969 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 189 m²/s²
0-3 km storm-relative helicity: 133 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

110 
WUUS51 KPHI 142137
SVRPHI
NJC005-007-019-021-PAC017-029-045-091-101-142215-
/O.NEW.KPHI.SV.W.0030.240614T2137Z-240614T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
537 PM EDT Fri Jun 14 2024

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  South central Hunterdon County in northwestern New Jersey...
  Northwestern Camden County in southern New Jersey...
  Mercer County in central New Jersey...
  Northwestern Burlington County in southern New Jersey...
  Southeastern Montgomery County in southeastern Pennsylvania...
  Bucks County in southeastern Pennsylvania...
  East central Chester County in southeastern Pennsylvania...
  Philadelphia County in southeastern Pennsylvania...
  Northern Delaware County in southeastern Pennsylvania...

* Until 615 PM EDT.

* At 536 PM EDT, severe thunderstorms were located along a line
  extending from Dublin to Radnor Township, moving east 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, Bensalem, Ewing, Norristown, Willingboro,
  Lansdale, West Norriton, East Norriton, Lumberton, Princeton,
  Florence, Burlington, Bristol, Mount Holly, Perkasie, Doylestown,
  Byram, Riverside, and Conshohocken.

This includes the following highways...
 New Jersey Turnpike between exits 5 and 7A.
 Pennsylvania Turnpike between mile markers 321 and 359.
 Northeast Extension between mile markers 21 and 32.
 Interstate 95 in Pennsylvania between mile markers 24 and 40.
 Interstate 76 in Pennsylvania between mile markers 327 and 341.
 Interstate 195 in New Jersey between mile markers 0 and 5.
 Interstate 295 in New Jersey between mile markers 39 and 76.
 Interstate 476 in Pennsylvania between mile markers 12 and 19.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Wind damage with these storms could occur before any rain or 
lightning. Do not wait for the sound of thunder before taking cover.
SEEK SHELTER IMMEDIATELY inside a sturdy structure and stay away from
windows.

&&

LAT...LON 3992 7481 4005 7553 4045 7523 4041 7474
      4037 7472 4039 7467 4039 7463 4038 7462
      4035 7463 4033 7462 4030 7457
TIME...MOT...LOC 2136Z 273DEG 30KT 4038 7518 4005 7535 

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

$$

Hoeflich

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 14, 4:14 PM EDT	Severe Thunderstorm Warning	PHI	Sussex, Warren	46 min
Jun 14, 4:40 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Warren	50 min
Jun 14, 5:02 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	43 min
Jun 14, 5:18 PM EDT	Severe Thunderstorm Warning	PHI	Morris, Sussex, Warren	42 min
Jun 14, 5:23 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Middlesex, Morris, Somerset, Warren	52 min
Jun 14, 5:51 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Mercer, Middlesex, Monmouth, Ocean	39 min
Jun 14, 5:56 PM EDT	Special Marine Warning	PHI		64 min
Jun 14, 5:59 PM EDT	Flash Flood Warning	PHI	Burlington	4 hr
Jun 14, 6:09 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Mercer, Middlesex, Somerset	21 min
Jun 14, 6:18 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex, Monmouth, Somerset	27 min
Jun 14, 6:24 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Mercer, Middlesex, Monmouth, Ocean	51 min
Jun 14, 6:29 PM EDT	Special Marine Warning	PHI		2 hr
Jun 14, 6:34 PM EDT	Severe Thunderstorm Warning	PHI	Cape May, Cumberland	41 min
Jun 14, 6:40 PM EDT	Special Marine Warning	PHI		65 min
Jun 14, 6:44 PM EDT	Flash Flood Warning	PHI	Burlington, Mercer	3 hr
Jun 14, 6:47 PM EDT	Special Marine Warning	PHI		58 min
Jun 14, 7:03 PM EDT	Special Marine Warning	PHI		87 min
Jun 14, 4:37 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Lehigh	38 min
Jun 14, 5:07 PM EDT	Flash Flood Warning	PHI	Chester	4 hr
Jun 14, 5:17 PM EDT	Severe Thunderstorm Warning	PHI	Delaware, Montgomery, Philadelphia	43 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.