Alert archive / New Jersey / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 234, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 29, 2021, 7:25 PM EDT for Bucks County, Pennsylvania; Burlington County, Monmouth County, Ocean County, New Jersey. It was in force for 50 min. 7 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, 2021, 7:25 PM EDT (23:25 UTC)
- Expired
- Jul 29, 2021, 8:15 PM EDT
- In force
- 50 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 1.5 in
- Wind
- 60.0 mph
Counties Burlington County, NJ, Monmouth County, NJ, Ocean County, NJ, Bucks County, PA
The radar
The Philadelphia radar (KDIX), 25 km from the middle of the area, began a volume at 23:24 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, 7:26 PM EDT | HAIL 1 | Mount Holly Wfo, NJ | |
| Jul 29, 7:27 PM EDT | HAIL 1.5 | Hainesport, NJ | MEASURED 1.5 INCH HAIL. |
| Jul 29, 7:29 PM EDT | HAIL 1.25 | Mount Holly Wfo, NJ | |
| Jul 29, 7:30 PM EDT | TSTM WND DMG | 1 Ne Rancocas, NJ | METAL BLEACHERS DISPLACED, FENCE AND SIGN BLOWN DOWN, SOME SHINGLES BLOWN OFF. TIME ESTIMATED FROM RADAR. |
| Jul 29, 7:31 PM EDT | HAIL 1.25 | 1 Nw Mount Holly, NJ | PICTURE OF HAIL NEAR MOUNT HOLLY, NJ. TIME ESTIMATED FROM RADAR. |
| Jul 29, 7:35 PM EDT | TSTM WND DMG | 1 Sse Mount Holly Wfo, NJ | LARGE TREE UPROOTED. |
| Jul 29, 8:04 PM EDT | TORNADO | 6 Ese New Egypt, NJ | THE TORNADO TOUCHED DOWN EAST OF HAWKIN ROAD NEAR THE INTERSECTION OF BORDENS MILL BRANCH AND SUCCESS BRANCH IN JACKSON TOWNSHIP. THE ENTIRE LIFE CYCLE OF THIS TORNADO WAS WITHIN A LARGE WOODED AREA BETWEEN SUCCESS LAKE AND THE LAKEHURST NAVAL AIR FIELD. BASED |
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, 2:23 PM EDT | Tornado Watch | SPC | 8 hr |
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 11.4 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.
- Mixed-layer CAPE
- 54 J/kg
- Mixed-layer CIN
- -32 J/kg
- Mixed-layer LCL
- 823 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 65 m²/s²
- 0-3 km storm-relative helicity
- 127 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
372
WUUS51 KPHI 292325
SVRPHI
NJC005-025-029-PAC017-300015-
/O.NEW.KPHI.SV.W.0234.210729T2325Z-210730T0015Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
725 PM EDT Thu Jul 29 2021
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Northwestern Ocean County in southern New Jersey...
Northern Burlington County in southern New Jersey...
Southwestern Monmouth County in central New Jersey...
Southeastern Bucks County in southeastern Pennsylvania...
* Until 815 PM EDT.
* At 725 PM EDT, a severe thunderstorm was located over Willingboro,
or 14 miles south of Trenton, moving southeast at 25 mph.
HAZARD...Ping pong ball size hail and 60 mph wind gusts.
SOURCE...Public.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Wind
damage to roofs, siding, trees, and power lines is
possible.
* Locations impacted include...
Willingboro, Medford, Lumberton, Florence, Burlington, Bristol,
Mount Holly, Riverside, Tabernacle, Bordentown, Presidential Lakes
Estates, Beverly, Tullytown, Pemberton, Wrightstown,
Florence-Roebling, Leisuretowne, Chatsworth, Jacksonville and
Georgetown.
This includes the following highways...
New Jersey Turnpike between exits 5 and 7A.
Pennsylvania Turnpike between mile markers 356 and 359.
Interstate 95 in Pennsylvania between mile markers 37 and 40.
Interstate 295 in New Jersey between mile markers 41 and 57.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 900 PM EDT for southern and
central New Jersey...and southeastern Pennsylvania.
Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.
Prepare immediately for large hail and damaging winds. People outside
should move immediately to shelter inside a strong building. Stay
away from windows.
&&
LAT...LON 3975 7456 4001 7499 4018 7486 4016 7472
4015 7472 4016 7471 4015 7463 4014 7459
4015 7459 4011 7432
TIME...MOT...LOC 2325Z 296DEG 23KT 4002 7484
TORNADO...POSSIBLE
HAIL...1.50IN
WIND...60MPH
$$
Staarmann3 follow-up statements
160
WWUS51 KPHI 292329
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
729 PM EDT Thu Jul 29 2021
NJC005-025-029-PAC017-300015-
/O.CON.KPHI.SV.W.0234.000000T0000Z-210730T0015Z/
Ocean NJ-Burlington NJ-Monmouth NJ-Bucks PA-
729 PM EDT Thu Jul 29 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM EDT
FOR NORTHWESTERN OCEAN...NORTHERN BURLINGTON...SOUTHWESTERN MONMOUTH
AND SOUTHEASTERN BUCKS COUNTIES...
At 727 PM EDT, a severe thunderstorm was located over Mount Holly,
or 14 miles south of Trenton, moving southeast at 25 mph. Half
dollar sized hail is falling at the WFO in Mount Holly as of 7:30 PM
EDT.
HAZARD...Ping pong ball size hail and 60 mph wind gusts.
SOURCE...National Weather Service employees.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Wind damage
to roofs, siding, trees, and power lines is possible.
Locations impacted include...
Willingboro, Medford, Lumberton, Florence, Burlington, Bristol, Mount
Holly, Riverside, Tabernacle, Bordentown, Presidential Lakes Estates,
Beverly, Tullytown, Pemberton, Wrightstown, Florence-Roebling,
Leisuretowne, Chatsworth, Jacksonville and Georgetown.
This includes the following highways...
New Jersey Turnpike between exits 5 and 7A.
Pennsylvania Turnpike between mile markers 356 and 359.
Interstate 95 in Pennsylvania between mile markers 37 and 40.
Interstate 295 in New Jersey between mile markers 41 and 57.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 900 PM EDT for southern and
central New Jersey...and southeastern Pennsylvania.
Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.
Prepare immediately for large hail and damaging winds. People outside
should seek shelter inside a well-built structure and away from
windows.
&&
LAT...LON 3975 7456 4001 7499 4018 7486 4016 7472
4015 7472 4016 7471 4015 7463 4014 7459
4015 7459 4011 7432
TIME...MOT...LOC 2327Z 296DEG 23KT 4001 7483
TORNADO...POSSIBLE
HAIL...1.50IN
WIND...60MPH
$$
Staarmann386
WWUS51 KPHI 292339
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
739 PM EDT Thu Jul 29 2021
PAC017-292348-
/O.CAN.KPHI.SV.W.0234.000000T0000Z-210730T0015Z/
Bucks PA-
739 PM EDT Thu Jul 29 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN BUCKS COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 900 PM EDT for southern and
central New Jersey...and southeastern Pennsylvania.
LAT...LON 3975 7456 3997 7492 4014 7474 4016 7471
4015 7463 4014 7462 4014 7459 4015 7459
4011 7432
TIME...MOT...LOC 2338Z 296DEG 23KT 3998 7475
$$
NJC005-025-029-300015-
/O.CON.KPHI.SV.W.0234.000000T0000Z-210730T0015Z/
Ocean NJ-Burlington NJ-Monmouth NJ-
739 PM EDT Thu Jul 29 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM EDT
FOR NORTHWESTERN OCEAN...NORTHERN BURLINGTON AND SOUTHWESTERN
MONMOUTH COUNTIES...
At 738 PM EDT, a severe thunderstorm was located over Mount Holly,
or 16 miles south of Trenton, moving southeast at 25 mph. Half
dollar sized hail was falling at the WFO in Mount Holly as of 7:30
PM EDT.
HAZARD...Ping pong ball size hail and 60 mph wind gusts.
SOURCE...National Weather Service employees.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Wind damage
to roofs, siding, trees, and power lines is possible.
Locations impacted include...
Medford, Lumberton, Mount Holly, Tabernacle, Bordentown, Presidential
Lakes Estates, Pemberton, Wrightstown, Leisuretowne, Chatsworth,
Jacksonville, Georgetown, Cassville, Crosswicks, Presidential Lakes,
Woodruff, Cream Ridge, Browns Mills, Jobstown and Columbus.
This includes the following highways...
New Jersey Turnpike between exits 5 and 6, and between exits 7 and
7A.
Interstate 295 in New Jersey between mile markers 41 and 58.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 900 PM EDT for southern and
central New Jersey...and southeastern Pennsylvania.
Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.
Prepare immediately for large hail and damaging winds. People outside
should seek shelter inside a well-built structure and away from
windows.
&&
LAT...LON 3975 7456 3997 7492 4014 7474 4016 7471
4015 7463 4014 7462 4014 7459 4015 7459
4011 7432
TIME...MOT...LOC 2338Z 296DEG 23KT 3998 7475
TORNADO...POSSIBLE
HAIL...1.50IN
WIND...60MPH
$$
Staarmann920
WWUS51 KPHI 292356
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
756 PM EDT Thu Jul 29 2021
NJC005-025-029-300015-
/O.CON.KPHI.SV.W.0234.000000T0000Z-210730T0015Z/
Ocean NJ-Burlington NJ-Monmouth NJ-
756 PM EDT Thu Jul 29 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM EDT
FOR NORTHWESTERN OCEAN...NORTHEASTERN BURLINGTON AND SOUTHWESTERN
MONMOUTH COUNTIES...
At 756 PM EDT, a severe thunderstorm was located over Presidential
Lakes Estates, or 21 miles south of Trenton, moving southeast at 25
mph.
HAZARD...Ping pong ball size hail and 60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Wind damage
to roofs, siding, trees, and power lines is possible.
Locations impacted include...
Presidential Lakes Estates, Pemberton, Wrightstown, Cassville,
Presidential Lakes, Woodruff, Cream Ridge, Browns Mills,
Leisuretowne, Chatsworth, Country Lake Estates, Pemberton Heights,
New Egypt, Fort Dix and McGuire AFB.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 900 PM EDT for southern and
central New Jersey.
Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.
Prepare immediately for large hail and damaging winds. People outside
should seek shelter inside a well-built structure and away from
windows.
&&
LAT...LON 3975 7456 3991 7480 4014 7459 4015 7459
4011 7432
TIME...MOT...LOC 2356Z 296DEG 23KT 3993 7461
TORNADO...POSSIBLE
HAIL...1.50IN
WIND...60MPH
$$
StaarmannThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 29, 3:48 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Lehigh, Northampton | 42 min |
| Jul 29, 4:03 PM EDT | Tornado Warning | PHI | Berks, Lehigh, Northampton | 27 min |
| Jul 29, 4:27 PM EDT | Tornado Warning | PHI | Lehigh, Northampton | 16 min |
| Jul 29, 4:30 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Carbon, Lehigh, Monroe, Northampton | 45 min |
| Jul 29, 4:46 PM EDT | Areal Flood Advisory | PHI | Berks, Lehigh, Northampton | 3 hr |
| Jul 29, 4:56 PM EDT | Tornado Warning | PHI | Bucks, Lehigh, Northampton | 34 min |
| Jul 29, 4:57 PM EDT | Areal Flood Advisory | PHI | Bucks, Monroe, Northampton | 3 hr |
| Jul 29, 5:03 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Lehigh, Monroe, Northampton | 42 min |
| Jul 29, 5:08 PM EDT | Tornado Warning | PHI | Bucks | 37 min |
| Jul 29, 5:27 PM EDT | Areal Flood Advisory | PHI | Bucks | 3 hr |
| Jul 29, 5:32 PM EDT | Flash Flood Warning | PHI | Northampton | 2 hr |
| Jul 29, 5:32 PM EDT | Tornado Warning | PHI | Bucks | 28 min |
| Jul 29, 5:51 PM EDT | Tornado Warning | PHI | Bucks | 24 min |
| Jul 29, 5:58 PM EDT | Flash Flood Warning | PHI | Bucks | 3 hr |
| Jul 29, 6:06 PM EDT | Tornado Warning | PHI | Bucks | 39 min |
| Jul 29, 6:21 PM EDT | Special Weather Statement | PHI | Bucks | 24 min |
| Jul 29, 6:45 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery, Philadelphia | 45 min |
| Jul 29, 7:07 PM EDT | Tornado Warning | PHI | Bucks, Philadelphia | 23 min |
| Jul 29, 7:12 PM EDT | Flash Flood Warning | PHI | Bucks, Philadelphia | 4 hr |
| Jul 29, 3:33 AM EDT | Small Craft Advisory | PHI | 20 hr | |
| Jul 29, 1:33 PM EDT | Special Marine Warning | PHI | 42 min | |
| Jul 29, 2:53 PM EDT | Special Marine Warning | PHI | 100 min | |
| Jul 29, 4:26 PM EDT | Special Weather Statement | PHI | Morris | 34 min |
| Jul 29, 5:01 PM EDT | Special Weather Statement | PHI | Morris | 29 min |
| Jul 29, 6:44 PM EDT | Tornado Warning | PHI | Mercer, Monmouth, Ocean | 46 min |
| Jul 29, 6:56 PM EDT | Flash Flood Warning | PHI | Mercer, Middlesex, Monmouth, Ocean, Somerset | 4 hr |
| Jul 29, 7:18 PM EDT | Tornado Warning | PHI | Mercer, Middlesex, Monmouth, Ocean | 27 min |
| Jul 29, 7:28 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Mercer, Middlesex, Monmouth, Ocean | 47 min |
| Jul 29, 7:52 PM EDT | Special Marine Warning | PHI | 113 min |
Nearby
Severe Thunderstorm Warnings in New Jersey, 2021Severe Thunderstorm Warnings in Pennsylvania, 2021Every severe thunderstorm warning in 2021
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.