Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2026
Severe Thunderstorm Warning 295, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 10, 2026, 3:21 PM EDT for 4 counties in Pennsylvania. It was in force for 39 min. 3 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
- Aug 10, 2026, 3:21 PM EDT (19:21 UTC)
- Expired
- Aug 10, 2026, 4:00 PM EDT
- In force
- 39 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Carbon County, PA, Lehigh County, PA, Monroe County, PA, Northampton County, PA
The radar
The Binghamton radar (KBGM), 145 km from the middle of the area, began a volume at 19:21 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 |
|---|---|---|---|
| Aug 10, 3:34 PM EDT | TSTM WND DMG | Mahoning Twp, PA | Tree down on wires in Mahoning Township. Time estimated from radar. |
| Aug 10, 3:47 PM EDT | TSTM WND DMG | Lower Towamensing Twp, PA | Tree down on wires in Lower Towamensing Township. Time estimated from radar. |
| Aug 10, 3:55 PM EDT | TSTM WND DMG | Moore Twp, PA | Trees down in Moore Township. Time estimated from radar. |
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 |
|---|---|---|---|
| Aug 10, 2:10 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 7.4 hours before the alert went out and 240 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
- 1516 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- -22 m²/s²
- 0-3 km storm-relative helicity
- 9 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
980
WUUS51 KPHI 101921
SVRPHI
PAC025-077-089-095-102000-
/O.NEW.KPHI.SV.W.0295.260810T1921Z-260810T2000Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
321 PM EDT Mon Aug 10 2026
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Northwestern Lehigh County in eastern Pennsylvania...
Carbon County in northeastern Pennsylvania...
Southwestern Monroe County in northeastern Pennsylvania...
West central Northampton County in eastern Pennsylvania...
* Until 400 PM EDT.
* At 321 PM EDT, a severe thunderstorm was located over Hazleton,
moving east at 40 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, Lehighton, Northampton, Palmerton, Jim Thorpe,
Slatington, Nesquehoning, Weatherly, Walnutport, Neffs, Coffeetown,
Lake Harmony, New Tripoli, Long Pond, Kresgeville, Sun Valley,
Beltzville State Park, McMichael, Blakeslee, and Penn Forest
Reservoir.
This includes the following highways...
Northeast Extension between mile markers 56 and 97.
Interstate 78 in Pennsylvania between mile markers 49 and 54.
Interstate 80 in Pennsylvania between mile markers 277 and 290.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
To report severe weather, contact your nearest law enforcement
agency. They will send your report to the National Weather Service
office in Mount Holly NJ.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4101 7531 4054 7557 4066 7587 4068 7589
4074 7576 4083 7590 4091 7599 4101 7573
4103 7574 4105 7577 4109 7577 4111 7571
4113 7569
TIME...MOT...LOC 1921Z 290DEG 33KT 4092 7595
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MPS2 follow-up statements
163
WWUS51 KPHI 101941
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
341 PM EDT Mon Aug 10 2026
PAC025-077-089-095-102000-
/O.CON.KPHI.SV.W.0295.000000T0000Z-260810T2000Z/
Lehigh PA-Carbon PA-Monroe PA-Northampton PA-
341 PM EDT Mon Aug 10 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM EDT
FOR NORTHWESTERN LEHIGH...SOUTHEASTERN CARBON...SOUTHWESTERN MONROE
AND WEST CENTRAL NORTHAMPTON COUNTIES...
At 341 PM EDT, a severe thunderstorm was located near New Mahoning,
or near Lehighton, moving east at 40 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Allentown, Lehighton, Northampton, Palmerton, Jim Thorpe, Slatington,
Nesquehoning, Weatherly, Walnutport, New Mahoning, Kunkletown, Neffs,
Coffeetown, New Tripoli, Berlinsville, Emerald, Claussville,
Danielsville, Wanamakers, and Beltzville State Park.
This includes the following highways...
Northeast Extension between mile markers 56 and 81.
Interstate 78 in Pennsylvania between mile markers 49 and 55.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Mount Holly NJ.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4081 7587 4094 7582 4086 7539 4054 7557
4066 7587 4068 7589 4074 7576
TIME...MOT...LOC 1941Z 283DEG 36KT 4079 7575
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MPS520
WWUS51 KPHI 101953
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
353 PM EDT Mon Aug 10 2026
PAC025-077-089-095-102001-
/O.EXP.KPHI.SV.W.0295.000000T0000Z-260810T2000Z/
Lehigh PA-Carbon PA-Monroe PA-Northampton PA-
353 PM EDT Mon Aug 10 2026
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN LEHIGH...
SOUTHEASTERN CARBON...SOUTHWESTERN MONROE AND WEST CENTRAL
NORTHAMPTON COUNTIES WILL EXPIRE AT 400 PM EDT...
The original storm which prompted the warning has redeveloped, and
as a result, a new Severe Thunderstorm Warning is now in effect for
portions of Lehigh, Carbon, and Northampton Counties until 430 PM
EDT. This original warning will be allowed to expire.
A Severe Thunderstorm Watch remains in effect until 900 PM EDT for
eastern and northeastern Pennsylvania.
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 4081 7587 4094 7582 4086 7539 4054 7557
4066 7587 4068 7589 4074 7576
TIME...MOT...LOC 1951Z 290DEG 33KT 4076 7565
$$
MPSThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 10, 3:50 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Lehigh, Northampton | 40 min |
| Aug 10, 4:02 PM EDT | Severe Thunderstorm Warning | PHI | Monroe, Northampton | 43 min |
| Aug 10, 4:46 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 20 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2026Every severe thunderstorm warning in 2026
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.