Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 232, NWS Philadelphia/Mount Holly

July 25, 2023Burlington County, Mercer County, New Jersey; Bucks County, Montgomery County, Philadelphia County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 25, 2023, 3:16 PM EDT for Burlington County, Mercer County, New Jersey; Bucks County, Montgomery County, Philadelphia County, Pennsylvania. It was in force for 44 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 25, 2023, 3:16 PM EDT (19:16 UTC)
Expired: Jul 25, 2023, 4:00 PM EDT
In force: 44 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Burlington County, NJ, Mercer County, NJ, Bucks 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 19:18 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.

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 25, 12:13 PM EDT	Severe Thunderstorm Watch	SPC	10 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 7.3 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: 231 J/kg
Mixed-layer CIN: -60 J/kg
Mixed-layer LCL: 960 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 43 m²/s²
0-3 km storm-relative helicity: 63 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

As transmitted.

197 
WUUS51 KPHI 251916
SVRPHI
NJC005-021-PAC017-091-101-252000-
/O.NEW.KPHI.SV.W.0232.230725T1916Z-230725T2000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
316 PM EDT Tue Jul 25 2023

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Southwestern Mercer County in central New Jersey...
  Northwestern Burlington County in southern New Jersey...
  Southeastern Montgomery County in southeastern Pennsylvania...
  Southeastern Bucks County in southeastern Pennsylvania...
  Northeastern Philadelphia County in southeastern Pennsylvania...

* Until 400 PM EDT.

* At 316 PM EDT, a severe thunderstorm was located over Rockledge, or
  7 miles northeast of Philadelphia, moving east at 25 mph.

  HAZARD...60 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Philadelphia, Trenton, Bensalem, Ewing, Willingboro, Lumberton,
  Florence, Burlington, Bristol, Mount Holly, Riverside, Palmyra,
  Hatboro, Jenkintown, Beverly, Rockledge, Yardley, Newtown,
  Tullytown and Abington.

This includes the following highways...
 New Jersey Turnpike between exits 5 and 6A.
 Pennsylvania Turnpike between mile markers 339 and 359.
 Interstate 95 in Pennsylvania between mile markers 27 and 40.
 Interstate 295 in New Jersey between mile markers 42 and 55.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4001 7519 4019 7519 4028 7474 3996 7470
TIME...MOT...LOC 1916Z 265DEG 23KT 4010 7507 

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

$$

MLB

1 follow-up statement

274 
WWUS51 KPHI 251935
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
335 PM EDT Tue Jul 25 2023

NJC005-021-PAC017-091-101-252000-
/O.CON.KPHI.SV.W.0232.000000T0000Z-230725T2000Z/
Mercer NJ-Burlington NJ-Montgomery PA-Bucks PA-Philadelphia PA-
335 PM EDT Tue Jul 25 2023

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM EDT
FOR SOUTHWESTERN MERCER...NORTHWESTERN BURLINGTON...SOUTHEASTERN
MONTGOMERY...SOUTHEASTERN BUCKS AND NORTHEASTERN PHILADELPHIA
COUNTIES...

At 334 PM EDT, a severe thunderstorm was located over Langhorne, or
10 miles west of Trenton, moving east at 25 mph.

HAZARD...60 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

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

Locations impacted include...
Philadelphia, Trenton, Bensalem, Ewing, Willingboro, Lumberton,
Florence, Burlington, Bristol, Mount Holly, Riverside, Palmyra,
Hatboro, Jenkintown, Beverly, Rockledge, Yardley, Newtown, Tullytown
and Abington.

This includes the following highways...
 New Jersey Turnpike between exits 5 and 6A.
 Pennsylvania Turnpike between mile markers 339 and 359.
 Interstate 95 in Pennsylvania between mile markers 27 and 40.
 Interstate 295 in New Jersey between mile markers 42 and 55.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4001 7519 4019 7519 4028 7474 3996 7470
TIME...MOT...LOC 1934Z 254DEG 22KT 4017 7495 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 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 25, 1:06 PM EDT	Severe Thunderstorm Warning	PHI	Warren	39 min
Jul 25, 1:21 PM EDT	Special Weather Statement	PHI	Hunterdon	24 min
Jul 25, 1:27 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer, Somerset	48 min
Jul 25, 1:38 PM EDT	Flash Flood Warning	PHI	Gloucester	4 hr
Jul 25, 1:52 PM EDT	Special Marine Warning	PHI		38 min
Jul 25, 2:06 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Somerset, Sussex, Warren	39 min
Jul 25, 2:08 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer, Middlesex, Somerset	52 min
Jul 25, 2:20 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland	55 min
Jul 25, 2:39 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex, Morris, Somerset, Sussex	51 min
Jul 25, 2:44 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Mercer, Middlesex, Morris, Somerset	2 hr
Jul 25, 2:45 PM EDT	Special Marine Warning	PHI		60 min
Jul 25, 2:53 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex, Monmouth, Somerset	52 min
Jul 25, 3:24 PM EDT	Special Marine Warning	PHI		96 min
Jul 25, 3:27 PM EDT	Areal Flood Advisory	PHI	Middlesex, Somerset	81 min
Jul 25, 3:40 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth, Ocean	50 min
Jul 25, 3:45 PM EDT	Special Marine Warning	PHI		60 min
Jul 25, 3:52 PM EDT	Severe Thunderstorm Warning	PHI	Cape May, Cumberland	53 min
Jul 25, 3:57 PM EDT	Areal Flood Advisory	PHI	Middlesex, Monmouth	3 hr
Jul 25, 3:58 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester, Salem	30 min
Jul 25, 4:12 PM EDT	Flash Flood Warning	PHI	Monmouth	3 hr
Jul 25, 4:17 PM EDT	Special Marine Warning	PHI		58 min
Jul 25, 4:50 PM EDT	Special Marine Warning	PHI		55 min
Jul 25, 4:57 PM EDT	Areal Flood Advisory	PHI	Monmouth, Ocean	2 hr
Jul 25, 5:09 PM EDT	Special Marine Warning	PHI		66 min
Jul 25, 11:58 AM EDT	Special Weather Statement	PHI	Montgomery	32 min
Jul 25, 12:07 PM EDT	Special Weather Statement	PHI	Berks	23 min
Jul 25, 12:16 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Lehigh, Montgomery	44 min
Jul 25, 12:31 PM EDT	Special Weather Statement	PHI	Berks	29 min
Jul 25, 12:33 PM EDT	Special Weather Statement	PHI	Berks	27 min
Jul 25, 12:37 PM EDT	Special Weather Statement	PHI	Carbon	38 min
Jul 25, 12:47 PM EDT	Areal Flood Advisory	PHI	Bucks, Montgomery	33 min
Jul 25, 12:56 PM EDT	Special Weather Statement	PHI	Northampton	34 min
Jul 25, 1:00 PM EDT	Special Weather Statement	PHI	Berks	30 min
Jul 25, 1:03 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Chester, Lehigh, Montgomery	42 min
Jul 25, 1:10 PM EDT	Special Weather Statement	PHI	Delaware	35 min
Jul 25, 1:12 PM EDT	Special Weather Statement	PHI	Monroe	33 min
Jul 25, 1:20 PM EDT	Flash Flood Warning	PHI	Bucks, Montgomery	5 hr
Jul 25, 1:27 PM EDT	Areal Flood Advisory	PHI	Berks	3 hr
Jul 25, 1:37 PM EDT	Areal Flood Advisory	PHI	Carbon	3 hr
Jul 25, 1:41 PM EDT	Areal Flood Advisory	PHI	Lehigh, Northampton	3 hr
Jul 25, 1:42 PM EDT	Special Weather Statement	PHI	Philadelphia	33 min
Jul 25, 1:49 PM EDT	Special Weather Statement	PHI	Chester	26 min
Jul 25, 1:54 PM EDT	Flash Flood Warning	PHI	Delaware, Philadelphia	4 hr
Jul 25, 1:55 PM EDT	Areal Flood Advisory	PHI	Monroe	2 hr
Jul 25, 2:14 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Montgomery	46 min
Jul 25, 2:21 PM EDT	Areal Flood Advisory	PHI	Berks, Chester, Montgomery	2 hr
Jul 25, 2:36 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Chester, Montgomery, Philadelphia	39 min
Jul 25, 2:51 PM EDT	Flash Flood Warning	PHI	Chester, Montgomery	3 hr
Jul 25, 2:57 PM EDT	Areal Flood Advisory	PHI	Chester	3 hr
Jul 25, 3:06 PM EDT	Areal Flood Advisory	PHI	Bucks, Chester, Montgomery	95 min
Jul 25, 3:13 PM EDT	Flash Flood Warning	PHI	Chester	4 hr
Jul 25, 3:21 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	39 min
Jul 25, 3:34 PM EDT	Flash Flood Warning	PHI	Chester, Montgomery	3 hr
Jul 25, 4:04 PM EDT	Areal Flood Advisory	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	3 hr
Jul 25, 4:55 PM EDT	Flash Flood Warning	PHI	Chester	118 min
Jul 25, 5:07 PM EDT	River Flood Warning	PHI	Chester	6 hr

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2023 Severe Thunderstorm Warnings in New Jersey, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.