Alert archive / New Jersey / Severe Thunderstorm Warnings in 2024
Severe Thunderstorm Warning 10, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Apr 30, 2024, 8:14 PM EDT for 4 counties in New Jersey; Bucks County, Lehigh County, Northampton County, Pennsylvania. It was in force for 46 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
- Apr 30, 2024, 8:14 PM EDT (00:14 UTC)
- Expired
- Apr 30, 2024, 9:00 PM EDT
- In force
- 46 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Hunterdon County, NJ, Morris County, NJ, Somerset County, NJ, Warren County, NJ, Bucks County, PA, Lehigh County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 96 km from the middle of the area, began a volume at 00:14 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 nearest sounding before it
Brookhaven, NY (KOKX), launched 00:00Z, 0.2 hours before the alert went out and 185 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
- 645 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 155 m²/s²
- 0-3 km storm-relative helicity
- 170 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
973
WUUS51 KPHI 010014
SVRPHI
NJC019-027-035-041-PAC017-077-095-010100-
/O.NEW.KPHI.SV.W.0010.240501T0014Z-240501T0100Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
814 PM EDT Tue Apr 30 2024
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Hunterdon County in northwestern New Jersey...
Southwestern Morris County in northern New Jersey...
Southern Warren County in northwestern New Jersey...
Northwestern Somerset County in northern New Jersey...
Southeastern Lehigh County in eastern Pennsylvania...
Northwestern Bucks County in southeastern Pennsylvania...
Central Northampton County in eastern Pennsylvania...
* Until 900 PM EDT.
* At 813 PM EDT, severe thunderstorms were located along a line
extending from Roxburg to near Bethlehem to near Emmaus, moving
east at 25 mph. This storm has a history of producing quarter
sized to half dollar sized hail in the Lehigh Valley.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Public. At 755 PM EDT, half dollar sized hail was
reported in Whitehall Township, PA.
IMPACT...Minor damage to vehicles is possible. Wind damage to
roofs, siding, trees, and power lines is possible.
* Locations impacted include...
Allentown, Easton, Bethlehem, Dover, Forks, Emmaus, Hackettstown,
Quakertown, Perkasie, Byram, Wilson, Bedminster, Wharton,
Washington, Rockaway, Hellertown, Nazareth, Mendham, Flemington,
and Tinicum.
This includes the following highways...
Northeast Extension between mile markers 42 and 55.
Interstate 78 in Pennsylvania between mile markers 56 and 76.
Interstate 78 in New Jersey between mile markers 0 and 25.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Prepare immediately for large hail and damaging winds. People outside
should move immediately to shelter inside a strong building. Stay
away from windows.
In addition to large hail and damaging winds, frequent cloud to
ground lightning is occurring with these storms. Move indoors
immediately. Remember, if you can hear thunder, you are close enough
to be struck by lightning.
&&
LAT...LON 4089 7451 4050 7488 4032 7524 4051 7563
4065 7542 4089 7512
TIME...MOT...LOC 0013Z 289DEG 23KT 4077 7508 4063 7532 4054 7544
HAIL THREAT...OBSERVED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Staarmann3 follow-up statements
622
WWUS51 KPHI 010035
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
835 PM EDT Tue Apr 30 2024
NJC019-027-035-041-PAC017-077-095-010100-
/O.CON.KPHI.SV.W.0010.000000T0000Z-240501T0100Z/
Hunterdon NJ-Morris NJ-Warren NJ-Somerset NJ-Lehigh PA-Bucks PA-
Northampton PA-
835 PM EDT Tue Apr 30 2024
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM EDT
FOR HUNTERDON...SOUTHWESTERN MORRIS...SOUTHERN WARREN...NORTHWESTERN
SOMERSET...SOUTHEASTERN LEHIGH...NORTHWESTERN BUCKS AND SOUTHEASTERN
NORTHAMPTON COUNTIES...
At 835 PM EDT, severe thunderstorms were located along a line
extending from near Long Valley to Riegelsville to near Quakertown,
moving east at 25 mph. This storm has a history of producing quarter
sized to half dollar sized hail in the Lehigh Valley
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Trained weather spotters. At 755 PM EDT, half dollar sized
hail was reported in Whitehall Township, PA.
IMPACT...Minor damage to vehicles is possible. Wind damage to roofs,
siding, trees, and power lines is possible.
Locations impacted include...
Allentown, Easton, Bethlehem, Dover, Forks, Emmaus, Hackettstown,
Quakertown, Perkasie, Byram, Wilson, Bedminster, Wharton, Washington,
Rockaway, Hellertown, Mendham, Flemington, Tinicum, and High Bridge.
This includes the following highways...
Northeast Extension between mile markers 42 and 52.
Interstate 78 in Pennsylvania between mile markers 59 and 76.
Interstate 78 in New Jersey between mile markers 0 and 25.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Frequent cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
&&
LAT...LON 4089 7451 4050 7488 4032 7524 4049 7559
4068 7533 4089 7506
TIME...MOT...LOC 0035Z 288DEG 23KT 4077 7482 4059 7517 4047 7538
HAIL THREAT...OBSERVED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Staarmann364
WWUS51 KPHI 010047
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
847 PM EDT Tue Apr 30 2024
NJC019-027-035-041-PAC017-077-095-010100-
/O.CON.KPHI.SV.W.0010.000000T0000Z-240501T0100Z/
Hunterdon NJ-Morris NJ-Warren NJ-Somerset NJ-Lehigh PA-Bucks PA-
Northampton PA-
847 PM EDT Tue Apr 30 2024
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM EDT
FOR HUNTERDON...SOUTHWESTERN MORRIS...SOUTHERN WARREN...NORTHWESTERN
SOMERSET...SOUTHEASTERN LEHIGH...NORTHWESTERN BUCKS AND SOUTHEASTERN
NORTHAMPTON COUNTIES...
At 846 PM EDT, severe thunderstorms were located along a line
extending from near Chester to Milford to Quakertown, moving east at
25 mph. This storm has a history of producing quarter sized hail in
the Lehigh Valley
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to vehicles is possible. Wind damage to roofs,
siding, trees, and power lines is possible.
Locations impacted include...
Dover, Hackettstown, Quakertown, Perkasie, Byram, Bedminster,
Wharton, Washington, Rockaway, Mendham, Flemington, Tinicum, High
Bridge, Clinton, Peapack And Gladstone, Oxford, Alpha, Dublin, Glen
Gardner, and Chester.
This includes the following highways...
Northeast Extension between mile markers 42 and 47.
Interstate 78 in New Jersey between mile markers 0 and 25.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Frequent cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
&&
LAT...LON 4089 7451 4050 7488 4032 7524 4045 7550
4065 7520 4089 7500
TIME...MOT...LOC 0046Z 287DEG 23KT 4081 7471 4059 7509 4043 7533
HAIL THREAT...OBSERVED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Staarmann400
WWUS51 KPHI 010057
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
857 PM EDT Tue Apr 30 2024
NJC019-027-035-041-PAC017-077-095-010106-
/O.EXP.KPHI.SV.W.0010.000000T0000Z-240501T0100Z/
Hunterdon NJ-Morris NJ-Warren NJ-Somerset NJ-Lehigh PA-Bucks PA-
Northampton PA-
857 PM EDT Tue Apr 30 2024
...THE SEVERE THUNDERSTORM WARNING FOR HUNTERDON...SOUTHWESTERN
MORRIS...SOUTHERN WARREN...NORTHWESTERN SOMERSET...SOUTHEASTERN
LEHIGH...NORTHWESTERN BUCKS AND SOUTHEASTERN NORTHAMPTON COUNTIES
WILL EXPIRE AT 900 PM EDT...
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However small
hail, gusty winds, and heavy rain are still possible with these
thunderstorms.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Mount Holly NJ.
LAT...LON 4089 7451 4050 7488 4032 7524 4045 7550
4065 7520 4089 7500
TIME...MOT...LOC 0056Z 289DEG 23KT 4079 7465 4057 7503 4041 7527
$$
StaarmannThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 30, 8:54 PM EDT | Special Weather Statement | PHI | Morris | 51 min |
| Apr 30, 8:56 PM EDT | Special Weather Statement | PHI | Hunterdon | 34 min |
Nearby
Severe Thunderstorm Warnings in New Jersey, 2024Severe Thunderstorm Warnings in Pennsylvania, 2024Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.