Alert archive / New Jersey / Severe Thunderstorm Warnings in 2023
Severe Thunderstorm Warning 261, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 29, 2023, 6:26 PM EDT for New Castle County, Delaware; 4 counties in New Jersey; Delaware County, Philadelphia County, Pennsylvania. It was in force for 49 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 29, 2023, 6:26 PM EDT (22:26 UTC)
- Expired
- Jul 29, 2023, 7:15 PM EDT
- In force
- 49 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties New Castle County, DE, Burlington County, NJ, Camden County, NJ, Gloucester County, NJ, Salem County, NJ, Delaware County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 68 km from the middle of the area, began a volume at 22:29 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 29, 6:55 PM EDT | TSTM WND DMG | Lima, PA | Corrects time on previous tstm wnd dmg report from Lima. Large tree fell onto vehicle. No injuries reported. Photo via social media. |
| Jul 29, 7:00 PM EDT | TSTM WND DMG | Aston Twp., PA | Corrects time on previous tstm wnd dmg report from Aston Twp.. A few trees down reported around Aston and Ridley Township. |
| Jul 29, 7:08 PM EDT | TSTM WND DMG | Ridley Twp., PA | Trees down in Ridgley Twp. Time estimated from radar. |
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 |
|---|---|---|---|
| Jul 29, 2:48 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 10.4 hours before the alert went out and 214 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.
- Mixed-layer CAPE
- 87 J/kg
- Mixed-layer CIN
- -147 J/kg
- Mixed-layer LCL
- 1163 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 50 m²/s²
- 0-3 km storm-relative helicity
- 68 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
490
WUUS51 KPHI 292226
SVRPHI
DEC003-NJC005-007-015-033-PAC045-101-292315-
/O.NEW.KPHI.SV.W.0261.230729T2226Z-230729T2315Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
626 PM EDT Sat Jul 29 2023
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Northeastern New Castle County in northern Delaware...
Northwestern Salem County in southern New Jersey...
Camden County in southern New Jersey...
Northwestern Gloucester County in southern New Jersey...
West central Burlington County in southern New Jersey...
Southwestern Philadelphia County in southeastern Pennsylvania...
Southeastern Delaware County in southeastern Pennsylvania...
* Until 715 PM EDT.
* At 625 PM EDT, a severe thunderstorm was located over Chester, or
12 miles northeast of Wilmington, moving east at 40 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, Camden, Gloucester City, Cherry Hill, Evesham, Mount
Laurel, Chester, Willingboro, Deptford, Voorhees, West Deptford,
Lindenwold, Bellmawr, Yeadon, Woodbury, Berlin, Palmyra, Folcroft,
Swarthmore and Paulsboro.
This includes the following highways...
New Jersey Turnpike between exits 2 and 4.
Interstate 95 in Pennsylvania between mile markers 0 and 26.
Interstate 95 in Delaware between mile markers 22 and 23.
Interstate 76 in Pennsylvania between mile markers 343 and 351.
Interstate 76 in New Jersey between mile markers 0 and 3.
Interstate 295 in New Jersey between mile markers 10 and 47.
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 7.
Atlantic City Expressway between mile markers 42 and 44.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3975 7545 3994 7547 4004 7483 3975 7480
TIME...MOT...LOC 2225Z 265DEG 35KT 3986 7537
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MLB1 follow-up statement
829
WWUS51 KPHI 292236
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
636 PM EDT Sat Jul 29 2023
DEC003-NJC033-292245-
/O.CAN.KPHI.SV.W.0261.000000T0000Z-230729T2315Z/
New Castle DE-Salem NJ-
636 PM EDT Sat Jul 29 2023
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN NEW CASTLE AND
NORTHWESTERN SALEM COUNTIES IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 900 PM EDT for
southern New Jersey...and southeastern Pennsylvania.
LAT...LON 3975 7539 3976 7540 3995 7541 4004 7483
3975 7480
TIME...MOT...LOC 2235Z 265DEG 35KT 3987 7523
$$
NJC005-007-015-PAC045-101-292315-
/O.CON.KPHI.SV.W.0261.000000T0000Z-230729T2315Z/
Camden NJ-Gloucester NJ-Burlington NJ-Philadelphia PA-Delaware PA-
636 PM EDT Sat Jul 29 2023
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT
FOR CAMDEN...NORTHWESTERN GLOUCESTER...WEST CENTRAL BURLINGTON...
SOUTHWESTERN PHILADELPHIA AND SOUTHEASTERN DELAWARE COUNTIES...
At 635 PM EDT, a severe thunderstorm was located over Philadelphia
International Airport, or near Gloucester City, moving east at 40
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, Camden, Gloucester City, Cherry Hill, Evesham, Mount
Laurel, Chester, Willingboro, Deptford, Voorhees, West Deptford,
Lindenwold, Bellmawr, Yeadon, Woodbury, Berlin, Palmyra, Folcroft,
Swarthmore and Paulsboro.
This includes the following highways...
New Jersey Turnpike between exits 2 and 4.
Interstate 95 in Pennsylvania between mile markers 3 and 26.
Interstate 76 in Pennsylvania between mile markers 343 and 351.
Interstate 76 in New Jersey between mile markers 0 and 3.
Interstate 295 in New Jersey between mile markers 10 and 47.
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 7.
Atlantic City Expressway between mile markers 42 and 44.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3975 7539 3976 7540 3995 7541 4004 7483
3975 7480
TIME...MOT...LOC 2235Z 265DEG 35KT 3987 7523
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MLBThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 28, 8:04 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 41 min |
| Jul 28, 8:33 PM EDT | Special Weather Statement | PHI | New Castle | 42 min |
| Jul 28, 10:07 PM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle | 38 min |
| Jul 28, 10:44 PM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle | 31 min |
| Jul 28, 11:00 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 60 min |
| Jul 28, 11:33 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 27 min |
| Jul 28, 11:59 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 31 min |
| Jul 29, 12:12 AM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 36 min |
| Jul 29, 4:55 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 50 min |
| Jul 29, 5:00 PM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle | 60 min |
| Jul 29, 5:44 PM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle | 46 min |
| Jul 29, 6:00 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 75 min |
| Jul 29, 6:18 PM EDT | Tornado Warning | PHI | Sussex | 27 min |
| Jul 28, 8:36 PM EDT | Special Marine Warning | PHI | 54 min | |
| Jul 28, 9:02 PM EDT | Special Weather Statement | PHI | Camden | 43 min |
| Jul 28, 9:18 PM EDT | Special Weather Statement | PHI | Cape May, Cumberland, Salem | 42 min |
| Jul 28, 9:32 PM EDT | Special Marine Warning | PHI | 58 min | |
| Jul 28, 9:44 PM EDT | Special Weather Statement | PHI | Burlington, Camden, Mercer, Middlesex | 61 min |
| Jul 28, 10:00 PM EDT | Special Weather Statement | PHI | Atlantic, Cape May | 45 min |
| Jul 28, 10:28 PM EDT | Special Marine Warning | PHI | 62 min | |
| Jul 28, 10:54 PM EDT | Special Weather Statement | PHI | Cumberland, Salem | 36 min |
| Jul 28, 11:15 PM EDT | Special Weather Statement | PHI | Cape May | 30 min |
| Jul 28, 11:26 PM EDT | Special Marine Warning | PHI | 94 min | |
| Jul 29, 12:43 AM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Cape May, Cumberland | 47 min |
| Jul 29, 12:55 AM EDT | Special Marine Warning | PHI | 65 min | |
| Jul 29, 5:05 PM EDT | Special Marine Warning | PHI | 85 min | |
| Jul 29, 5:38 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Camden, Cumberland, Gloucester, Salem | 52 min |
| Jul 29, 5:51 PM EDT | Special Marine Warning | PHI | 114 min | |
| Jul 29, 6:07 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Cape May, Cumberland, Salem | 68 min |
| Jul 29, 6:13 PM EDT | Special Weather Statement | PHI | Morris, Sussex | 32 min |
| Jul 29, 6:13 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Mercer, Middlesex, Monmouth, Somerset | 47 min |
| Jul 29, 6:28 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Camden, Ocean | 47 min |
| Jul 29, 6:33 PM EDT | Severe Thunderstorm Warning | PHI | Cape May | 42 min |
| Jul 29, 6:41 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Mercer, Middlesex, Monmouth, Somerset | 49 min |
| Jul 29, 6:46 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Camden, Gloucester | 44 min |
| Jul 29, 6:51 PM EDT | Special Marine Warning | PHI | 54 min | |
| Jul 29, 7:19 PM EDT | Special Marine Warning | PHI | 56 min | |
| Jul 29, 7:19 PM EDT | Severe Thunderstorm Warning | PHI | Monmouth | 26 min |
| Jul 29, 7:35 PM EDT | Special Weather Statement | PHI | Monmouth | 70 min |
| Jul 29, 7:53 PM EDT | Special Marine Warning | PHI | 97 min | |
| Jul 29, 7:54 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Monmouth, Ocean | 40 min |
| Jul 28, 8:24 PM EDT | Special Weather Statement | PHI | Delaware, Montgomery | 51 min |
| Jul 29, 6:36 PM EDT | Special Weather Statement | PHI | Chester, Delaware | 24 min |
Nearby
Severe Thunderstorm Warnings in New Jersey, 2023Severe Thunderstorm Warnings in Pennsylvania, 2023Severe Thunderstorm Warnings in Delaware, 2023Every 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.