Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2025
Severe Thunderstorm Warning 178, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 14, 2025, 3:42 PM EDT for Lehigh County, Northampton County, Pennsylvania. It was in force for 9 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
- Jul 14, 2025, 3:42 PM EDT (19:42 UTC)
- Expired
- Jul 14, 2025, 3:51 PM EDT
- In force
- 9 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Lehigh County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 122 km from the middle of the area, began a volume at 19:45 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 12:00Z, 7.7 hours before the alert went out and 225 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
- 1 J/kg
- Mixed-layer CIN
- -115 J/kg
- Mixed-layer LCL
- 728 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 44 m²/s²
- 0-3 km storm-relative helicity
- 51 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
145
WUUS51 KPHI 141942
SVRPHI
PAC077-095-142030-
/O.NEW.KPHI.SV.W.0178.250714T1942Z-250714T2030Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
342 PM EDT Mon Jul 14 2025
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Central Lehigh County in eastern Pennsylvania...
Central Northampton County in eastern Pennsylvania...
* Until 430 PM EDT.
* At 341 PM EDT, a severe thunderstorm was located over Northampton,
or near Allentown, moving northeast at 15 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, Northampton, Hellertown, Nazareth,
Slatington, Bath, Walnutport, Steuben, Neffs, Coffeetown, Emerald,
Lehigh University, Claussville, Jordan Valley, Beersville,
Schnecksville, Old Orchard, and Catasauqua.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4055 7565 4072 7573 4083 7535 4060 7523
TIME...MOT...LOC 1941Z 234DEG 12KT 4067 7552
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
SFJ1 follow-up statement
935 WWUS51 KPHI 141951 SVSPHI Severe Weather Statement National Weather Service Mount Holly NJ 351 PM EDT Mon Jul 14 2025 PAC077-095-142001- /O.CAN.KPHI.SV.W.0178.000000T0000Z-250714T2030Z/ Lehigh PA-Northampton PA- 351 PM EDT Mon Jul 14 2025 ...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL LEHIGH AND CENTRAL NORTHAMPTON COUNTIES IS CANCELLED... The storm which prompted the warning has weakened below severe limits, and no longer poses an immediate threat to life or property. Therefore, the warning has been cancelled. LAT...LON 4055 7565 4072 7573 4083 7535 4060 7523 TIME...MOT...LOC 1949Z 234DEG 12KT 4069 7548 $$ SFJ
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 14, 3:37 PM EDT | Flash Flood Warning | PHI | Carbon, Monroe | 4 hr |
| Jul 14, 4:49 PM EDT | Flash Flood Warning | PHI | Carbon, Lehigh, Monroe, Northampton | 3 hr |
| Jul 14, 5:25 PM EDT | Flash Flood Warning | PHI | Bucks, Lehigh, Northampton | 4 hr |
| Jul 14, 5:32 PM EDT | Flash Flood Warning | PHI | Berks, Bucks, Chester, Lehigh, Montgomery | 6 hr |
| Jul 14, 7:45 PM EDT | Flash Flood Warning | PHI | Bucks, Montgomery, Philadelphia | 2 hr |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2025Every severe thunderstorm warning in 2025
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.