Alert archive / New Jersey / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 24, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Apr 29, 2021, 8:05 PM EDT for Bucks County, Philadelphia County, Pennsylvania; 5 counties in New Jersey. It was in force for 34 min. 5 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
- Apr 29, 2021, 8:05 PM EDT (00:05 UTC)
- Expired
- Apr 29, 2021, 8:39 PM EDT
- In force
- 34 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, Gloucester County, NJ, Monmouth County, NJ, Ocean County, NJ, Bucks County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 18 km from the middle of the area, began a volume at 00:09 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 |
|---|---|---|---|
| Apr 29, 8:06 PM EDT | TSTM WND DMG | Tacony, PA | MPING REPORT OF SNAPPED OR UPROOTED TREES AT THIS LOCATION. TIME ESTIMATED FROM RADAR. |
| Apr 29, 8:10 PM EDT | TSTM WND DMG | Cherry Hill, NJ | SEVERAL DOWNED TREES AND WIRES IN THE CHERRY HILL AREA. TIME ESTIMATED FROM RADAR. |
| Apr 29, 8:16 PM EDT | TSTM WND DMG | 1 Sw Evesboro, NJ | SEVERAL REPORTS OF DOWNED WIRES IN THE GREENTREE AND MARLTON AREAS. TIME ESTIMATED FROM RADAR. |
| Apr 29, 8:17 PM EDT | TSTM WND DMG | 3 N Mount Laurel, NJ | AN MPING REPORT OF LARGE TREE LIMBS OR POWER LINES DOWN. TIME ESTIMATED FROM RADAR. |
| Apr 29, 8:37 PM EDT | TSTM WND GST 47 | 2 E Fort Dix, NJ | AWOS STATION KWRI MCGUIRE AFB. |
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 00:00Z, 0.1 hours before the alert went out and 180 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 860 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 385 m²/s²
- 0-3 km storm-relative helicity
- 528 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
672
WUUS51 KPHI 300005
SVRPHI
NJC005-007-015-025-029-PAC017-101-300100-
/O.NEW.KPHI.SV.W.0024.210430T0005Z-210430T0100Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
805 PM EDT Thu Apr 29 2021
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Northwestern Ocean County in southern New Jersey...
Northwestern Camden County in southern New Jersey...
North central Gloucester County in southern New Jersey...
Burlington County in southern New Jersey...
Southwestern Monmouth County in central New Jersey...
Southeastern Bucks County in southeastern Pennsylvania...
East central Philadelphia County in southeastern Pennsylvania...
* Until 900 PM EDT.
* At 805 PM EDT, a severe thunderstorm was located over
Erlton-Ellisburg, or near Gloucester City, moving east at 55 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
* Locations impacted include...
Philadelphia, Camden, Gloucester City, Cherry Hill, Jackson,
Evesham, Mount Laurel, Willingboro, Voorhees, Medford, Lindenwold,
Lumberton, Bellmawr, Burlington, Bristol, Mount Holly, Riverside,
Berlin, Palmyra and Tabernacle.
People at the Burlington County Mega Site should seek safe shelter
immediately!
This includes the following highways...
New Jersey Turnpike between exits 3 and 6A.
Interstate 95 in Pennsylvania between mile markers 25 and 36.
Interstate 76 in New Jersey between mile markers 0 and 2.
Interstate 295 in New Jersey between mile markers 26 and 54.
Interstate 676 in New Jersey near mile marker 0.
Atlantic City Expressway near mile marker 44.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of
a building.
&&
LAT...LON 3983 7426 3977 7512 4006 7510 4011 7475
4014 7426
TIME...MOT...LOC 0005Z 265DEG 46KT 3990 7503
HAIL...<.75IN
WIND...60MPH
$$
Gorse3 follow-up statements
381
WWUS51 KPHI 300023
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
823 PM EDT Thu Apr 29 2021
NJC007-015-PAC017-101-300032-
/O.CAN.KPHI.SV.W.0024.000000T0000Z-210430T0100Z/
Camden NJ-Gloucester NJ-Bucks PA-Philadelphia PA-
823 PM EDT Thu Apr 29 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN CAMDEN...NORTH
CENTRAL GLOUCESTER...SOUTHEASTERN BUCKS AND EAST CENTRAL PHILADELPHIA
COUNTIES IS CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
LAT...LON 3983 7426 3979 7490 3980 7491 4007 7491
4010 7485 4011 7475 4014 7426
TIME...MOT...LOC 0022Z 255DEG 45KT 4010 7480 3998 7476 3983 7487
$$
NJC005-025-029-300100-
/O.CON.KPHI.SV.W.0024.000000T0000Z-210430T0100Z/
Ocean NJ-Burlington NJ-Monmouth NJ-
823 PM EDT Thu Apr 29 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM EDT
FOR NORTHWESTERN OCEAN...CENTRAL BURLINGTON AND SOUTHWESTERN MONMOUTH
COUNTIES...
At 822 PM EDT, severe thunderstorms were located along a line
extending from Florence to Mount Holly to Marlton Lakes, moving east
at 50 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Jackson, Evesham, Willingboro, Medford, Lumberton, Burlington,
Bristol, Mount Holly, Tabernacle, Presidential Lakes Estates,
Lakehurst, Pemberton, Wrightstown, Cedar Glen West, Leisuretowne,
Chatsworth, Jacksonville, Georgetown, Cassville and Presidential
Lakes.
This includes the following highways...
New Jersey Turnpike between exits 5 and 6A.
Interstate 295 in New Jersey between mile markers 41 and 54.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of
a building.
This line of severe thunderstorms may contain little or no
lightning. Do not wait until you hear thunder before taking cover.
&&
LAT...LON 3983 7426 3979 7490 3980 7491 4007 7491
4010 7485 4011 7475 4014 7426
TIME...MOT...LOC 0022Z 255DEG 45KT 4010 7480 3998 7476 3983 7487
HAIL...<.75IN
WIND...60MPH
$$
Gorse643
WWUS51 KPHI 300032
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
832 PM EDT Thu Apr 29 2021
NJC005-025-029-300100-
/O.CON.KPHI.SV.W.0024.000000T0000Z-210430T0100Z/
Ocean NJ-Burlington NJ-Monmouth NJ-
832 PM EDT Thu Apr 29 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM EDT
FOR NORTHWESTERN OCEAN...NORTHEASTERN BURLINGTON AND SOUTHWESTERN
MONMOUTH COUNTIES...
At 832 PM EDT, severe thunderstorms were located along a line
extending from near Georgetown to near Wrightstown to near
Tabernacle, moving east at 55 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Jackson, Tabernacle, Presidential Lakes Estates, Lakehurst,
Pemberton, Wrightstown, Cedar Glen West, Leisuretowne, Chatsworth,
Georgetown, Cassville, Presidential Lakes, Woodruff, Holiday
City-Berkeley, Bamber Lake, Cedar Glen Lakes, Whiting, Pine Ridge At
Crestwood, Browns Mills and Jobstown.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of
a building.
This line of severe thunderstorms may contain little or no
lightning. Do not wait until you hear thunder before taking cover.
&&
LAT...LON 3983 7426 3980 7475 4011 7472 4014 7426
TIME...MOT...LOC 0032Z 265DEG 46KT 4011 7468 3999 7464 3984 7475
HAIL...<.75IN
WIND...60MPH
$$
Gorse333
WWUS51 KPHI 300039
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
839 PM EDT Thu Apr 29 2021
NJC005-025-029-300048-
/O.CAN.KPHI.SV.W.0024.000000T0000Z-210430T0100Z/
Ocean NJ-Burlington NJ-Monmouth NJ-
839 PM EDT Thu Apr 29 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN OCEAN...
NORTHEASTERN BURLINGTON AND SOUTHWESTERN MONMOUTH COUNTIES IS
CANCELLED...
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning has been cancelled. However gusty winds are
still possible with these thunderstorms.
LAT...LON 3983 7426 3980 7475 4011 7472 4014 7426
TIME...MOT...LOC 0037Z 265DEG 46KT 4012 7460 4000 7456 3985 7467
$$
GorseThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 29, 8:55 PM EDT | Special Weather Statement | PHI | Monmouth | 35 min |
| Apr 30, 12:05 AM EDT | Storm Warning | PHI | 24 hr |
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.