Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2024
Severe Thunderstorm Warning 13, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 23, 2024, 8:21 AM EDT for 5 counties in Pennsylvania; Hunterdon County, Warren County, New Jersey. It was in force for 39 min. 15 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
- May 23, 2024, 8:21 AM EDT (12:21 UTC)
- Expired
- May 23, 2024, 9:00 AM EDT
- In force
- 39 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Hunterdon County, NJ, Warren County, NJ, Bucks County, PA, Carbon County, PA, Lehigh County, PA, Monroe County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 104 km from the middle of the area, began a volume at 12:22 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 |
|---|---|---|---|
| May 23, 8:22 AM EDT | TSTM WND DMG | 2 Wnw Allentown, PA | Fire department dispatched to Walbert Avenue and Columbia Street for trees and wires down. Time estimated from radar. |
| May 23, 8:23 AM EDT | TSTM WND DMG | 2 Wnw Laurys Station, PA | Some trees down on Magellan Drive in Walnutport. Time estimated from radar. |
| May 23, 8:23 AM EDT | TSTM WND DMG | 3 Sw West Catasauqua, PA | Several large trees snapped at the base in the Childrens Health Care parking lot on Pond Road in Allentown. Three cars trapped under one of the downed trees. No injuries reported. Time estimated from radar. |
| May 23, 8:29 AM EDT | TSTM WND GST 49 | Whitehall Twp, PA | |
| May 23, 8:30 AM EDT | TSTM WND DMG | 1 Se Bethlehem, PA | Downed trees and power lines along Stefko Boulevard in Bethlehem. Time estimated from radar. |
| May 23, 8:30 AM EDT | TSTM WND DMG | 1 W Bethlehem, PA | Report from mPING: 1-inch tree limbs broken. Time estimated from radar. |
| May 23, 8:30 AM EDT | TSTM WND DMG | 2 Ese Bethlehem Twp, PA | Multiple trees and large tree limbs down along Wagner Drive in Bethlehem Township. Time estimated from radar. |
| May 23, 8:30 AM EDT | TSTM WND GST 43 | Lehigh Valley Internati, PA | |
| May 23, 8:45 AM EDT | TSTM WND DMG | 1 E Phillipsburg, NJ | Trees down, some 6 inches in diameter and split, on Roseberry Street in Phillipsburg. Time estimated from radar. |
| May 23, 8:50 AM EDT | TSTM WND GST 45 | 1 Ene Pohatcong Twp, NJ | Mesonet station NJ17 Stewartsville. |
| May 23, 8:52 AM EDT | TSTM WND DMG | 1 Nne Asbury, NJ | Several very large tree limbs down. Time estimated from radar. |
| May 23, 8:52 AM EDT | TSTM WND GST 62 | 1 Nne Asbury, NJ | Measured 62 mph wind gust with a thunderstorm via a home weather station. |
| May 23, 8:52 AM EDT | HAIL 0.7 | 1 Nne Asbury, NJ | Pea to dime sized hail. |
| May 23, 8:54 AM EDT | TSTM WND DMG | Swinesburg, NJ | Numerous large tree limbs down in Alexandria township, including along Bloomsbury Road between Swinesburg and Bloomsbury. Time estimated from radar. |
| May 23, 8:56 AM EDT | TSTM WND DMG | 1 Ne Asbury, NJ | Report from mPING: 1-inch tree limbs broken. |
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 12:00Z, 0.4 hours before the alert went out and 191 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
- 438 J/kg
- Mixed-layer CIN
- -156 J/kg
- Mixed-layer LCL
- 879 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 74 m²/s²
- 0-3 km storm-relative helicity
- 70 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.2
The text
As transmitted.
252
WUUS51 KPHI 231221
SVRPHI
NJC019-041-PAC017-025-077-089-095-231300-
/O.NEW.KPHI.SV.W.0013.240523T1221Z-240523T1300Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
821 AM EDT Thu May 23 2024
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Central Hunterdon County in northwestern New Jersey...
Southwestern Warren County in northwestern New Jersey...
Lehigh County in eastern Pennsylvania...
Southeastern Carbon County in northeastern Pennsylvania...
Northwestern Bucks County in southeastern Pennsylvania...
South central Monroe County in northeastern Pennsylvania...
Northampton County in eastern Pennsylvania...
* Until 900 AM EDT.
* At 820 AM EDT, a severe thunderstorm was located over Coffeetown,
or near Allentown, moving east at 55 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...
Allentown, Easton, Lehighton, Bethlehem, Forks, Emmaus,
Northampton, Wilson, Washington, Hellertown, Nazareth, Palmerton,
Bangor, Flemington, Slatington, High Bridge, Pen Argyl, Wind Gap,
Clinton, and Bath.
This includes the following highways...
Northeast Extension between mile markers 48 and 75.
Interstate 78 in Pennsylvania between mile markers 48 and 76.
Interstate 78 in New Jersey between mile markers 0 and 20.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4079 7486 4079 7489 4077 7486 4050 7481
4048 7559 4054 7567 4083 7572 4089 7488
TIME...MOT...LOC 1220Z 266DEG 48KT 4063 7555
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
DeSilva3 follow-up statements
373
WWUS51 KPHI 231234
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
834 AM EDT Thu May 23 2024
PAC025-231244-
/O.CAN.KPHI.SV.W.0013.000000T0000Z-240523T1300Z/
Carbon PA-
834 AM EDT Thu May 23 2024
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CARBON COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 4081 7486 4079 7489 4077 7486 4050 7481
4049 7542 4063 7551 4081 7549 4082 7548
4085 7549 4089 7488
TIME...MOT...LOC 1234Z 266DEG 48KT 4064 7530
$$
NJC019-041-PAC017-077-089-095-231300-
/O.CON.KPHI.SV.W.0013.000000T0000Z-240523T1300Z/
Hunterdon NJ-Warren NJ-Lehigh PA-Bucks PA-Monroe PA-Northampton PA-
834 AM EDT Thu May 23 2024
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 AM EDT
FOR CENTRAL HUNTERDON...SOUTHWESTERN WARREN...EAST CENTRAL LEHIGH...
NORTHWESTERN BUCKS...SOUTH CENTRAL MONROE AND NORTHAMPTON COUNTIES...
At 834 AM EDT, a severe thunderstorm was located over Old Orchard, or
near Easton, moving east at 55 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...
Allentown, Easton, Bethlehem, Forks, Northampton, Wilson, Washington,
Hellertown, Nazareth, Bangor, Flemington, High Bridge, Pen Argyl,
Wind Gap, Clinton, Bath, Belvidere, Harmony, Oxford, and Alpha.
This includes the following highways...
Interstate 78 in Pennsylvania between mile markers 60 and 76.
Interstate 78 in New Jersey between mile markers 0 and 20.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4081 7486 4079 7489 4077 7486 4050 7481
4049 7542 4063 7551 4081 7549 4082 7548
4085 7549 4089 7488
TIME...MOT...LOC 1234Z 266DEG 48KT 4064 7530
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
DeSilva835
WWUS51 KPHI 231246
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
846 AM EDT Thu May 23 2024
PAC077-089-231255-
/O.CAN.KPHI.SV.W.0013.000000T0000Z-240523T1300Z/
Lehigh PA-Monroe PA-
846 AM EDT Thu May 23 2024
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL LEHIGH AND SOUTH
CENTRAL MONROE COUNTIES IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 4081 7486 4079 7489 4077 7486 4050 7481
4050 7522 4063 7531 4086 7527 4089 7488
TIME...MOT...LOC 1245Z 266DEG 48KT 4065 7509
$$
NJC019-041-PAC017-095-231300-
/O.CON.KPHI.SV.W.0013.000000T0000Z-240523T1300Z/
Hunterdon NJ-Warren NJ-Bucks PA-Northampton PA-
846 AM EDT Thu May 23 2024
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 AM EDT
FOR CENTRAL HUNTERDON...SOUTHERN WARREN...NORTH CENTRAL BUCKS AND
SOUTHEASTERN NORTHAMPTON COUNTIES...
At 845 AM EDT, a severe thunderstorm was located over Bloomsbury, or
7 miles east of Easton, moving east at 55 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...
Easton, Forks, Wilson, Washington, Bangor, Flemington, High Bridge,
Pen Argyl, Clinton, Belvidere, Harmony, Oxford, Alpha, Glen Gardner,
Ferndale, Belfast, Hampton, Frenchtown, Lebanon, and West Easton.
This includes the following highways...
Interstate 78 in Pennsylvania between mile markers 71 and 76.
Interstate 78 in New Jersey between mile markers 0 and 20.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4081 7486 4079 7489 4077 7486 4050 7481
4050 7522 4063 7531 4086 7527 4089 7488
TIME...MOT...LOC 1245Z 266DEG 48KT 4065 7509
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
DeSilva361
WWUS51 KPHI 231301
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
901 AM EDT Thu May 23 2024
NJC019-041-PAC017-095-231310-
/O.EXP.KPHI.SV.W.0013.000000T0000Z-240523T1300Z/
Hunterdon NJ-Warren NJ-Bucks PA-Northampton PA-
901 AM EDT Thu May 23 2024
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL HUNTERDON...SOUTHERN
WARREN...NORTH CENTRAL BUCKS AND SOUTHEASTERN NORTHAMPTON COUNTIES
HAS EXPIRED...
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been allowed to expire.
LAT...LON 4081 7486 4079 7489 4077 7486 4050 7481
4050 7522 4063 7531 4086 7527 4089 7488
TIME...MOT...LOC 1300Z 266DEG 48KT 4066 7482
$$
DeSilvaThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 23, 5:53 AM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery, Philadelphia | 24 min |
| May 23, 8:59 AM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Middlesex, Morris, Somerset, Sussex, Warren | 46 min |
| May 23, 9:44 AM EDT | Special Marine Warning | PHI | 61 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2024Severe Thunderstorm Warnings in New Jersey, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.