Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 246, NWS Philadelphia/Mount Holly

July 28, 2026Lehigh County, Northampton County, Pennsylvania; Warren County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 28, 2026, 1:22 PM EDT for Lehigh County, Northampton County, Pennsylvania; Warren County, New Jersey. It was in force for 38 min. 4 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: Jul 28, 2026, 1:22 PM EDT (17:22 UTC)
Expired: Jul 28, 2026, 2:00 PM EDT
In force: 38 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Warren County, NJ, Lehigh County, PA, Northampton County, PA

The radar

The Philadelphia radar (KDIX), 110 km from the middle of the area, began a volume at 17:24 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
Jul 28, 1:30 PM EDT	TSTM WND GST 45	Forks Twp, PA
Jul 28, 1:32 PM EDT	TSTM WND DMG	1 Sse Bangor, PA	Delayed report. Extensive tree damage was reported at a residence on Sunset Avenue. One large tree was uprooted and several smaller trees were snapped.
Jul 28, 1:37 PM EDT	TSTM WND DMG	Bangor, PA	Tree down in Bangor. Time estimated from radar.
Jul 28, 1:40 PM EDT	TSTM WND DMG	Washington, NJ	Tree down - 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
Jul 28, 12:51 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 5.4 hours before the alert went out and 199 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1266 J/kg
Mixed-layer CIN: -16 J/kg
Mixed-layer LCL: 637 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 41 m²/s²
0-3 km storm-relative helicity: 63 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

922 
WUUS51 KPHI 281722
SVRPHI
NJC041-PAC077-095-281800-
/O.NEW.KPHI.SV.W.0246.260728T1722Z-260728T1800Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
122 PM EDT Tue Jul 28 2026

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Southern Warren County in northwestern New Jersey...
  East central Lehigh County in eastern Pennsylvania...
  Northampton County in eastern Pennsylvania...

* Until 200 PM EDT.

* At 122 PM EDT, a severe thunderstorm was located over Steuben, or
  near Easton, moving northeast at 30 mph.

  HAZARD...60 mph wind gusts.

  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, Pen Argyl, Bath,
  Belvidere, Harmony, Oxford, Alpha, Belfast, West Easton, Tatamy,
  and East Bangor.

This includes the following highways...
 Interstate 78 in Pennsylvania between mile markers 66 and 76.
 Interstate 78 in New Jersey between mile markers 0 and 1, and near
mile marker 4.
 Interstate 80 in New Jersey between mile markers 2 and 8.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4056 7533 4066 7549 4098 7510 4081 7486
TIME...MOT...LOC 1722Z 230DEG 28KT 4067 7532 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Guzzo

1 follow-up statement

097 
WWUS51 KPHI 281753
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
153 PM EDT Tue Jul 28 2026

NJC041-PAC077-095-281801-
/O.EXP.KPHI.SV.W.0246.000000T0000Z-260728T1800Z/
Warren NJ-Lehigh PA-Northampton PA-
153 PM EDT Tue Jul 28 2026

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN WARREN...EAST CENTRAL
LEHIGH AND NORTHAMPTON COUNTIES WILL EXPIRE AT 200 PM EDT...

The severe thunderstorm which prompted the warning has weakened.
Therefore, the warning will be allowed to expire.

A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
northwestern New Jersey...and eastern Pennsylvania.

Remember, a Severe Thunderstorm Warning still remains in effect for
Warren county until 2:15 PM.

LAT...LON 4056 7533 4066 7549 4098 7510 4081 7486
TIME...MOT...LOC 1751Z 230DEG 28KT 4081 7509 

$$

Guzzo

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 27, 8:01 PM EDT	Severe Thunderstorm Warning	PHI	Chester	23 min
Jul 28, 1:02 PM EDT	Flash Flood Warning	PHI	Lehigh, Monroe, Northampton	4 hr
Jul 28, 1:31 PM EDT	Severe Thunderstorm Warning	PHI	Northampton	44 min
Jul 28, 1:49 PM EDT	Tornado Warning	PHI	Monroe, Northampton	26 min
Jul 28, 2:15 PM EDT	Severe Thunderstorm Warning	PHI	Northampton	45 min
Jul 28, 5:08 PM EDT	Severe Thunderstorm Warning	PHI	Lehigh, Northampton	15 min
Jul 28, 5:22 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	34 min
Jul 28, 5:29 PM EDT	Severe Thunderstorm Warning	PHI	Chester	61 min
Jul 28, 5:47 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Northampton	43 min
Jul 28, 5:55 PM EDT	Flash Flood Warning	PHI	Berks	3 hr
Jul 28, 6:16 PM EDT	Tornado Warning	PHI	Chester	29 min
Jul 28, 6:17 PM EDT	Flash Flood Warning	PHI	Bucks, Lehigh, Northampton	6 hr
Jul 28, 6:23 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware	67 min
Jul 28, 6:46 PM EDT	Tornado Warning	PHI	Delaware	29 min
Jul 28, 6:56 PM EDT	Flash Flood Warning	PHI	Bucks, Lehigh, Northampton	5 hr
Jul 28, 7:06 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	54 min
Jul 28, 7:08 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Montgomery	35 min
Jul 28, 7:11 PM EDT	Flash Flood Warning	PHI	Delaware, Philadelphia	3 hr
Jul 28, 7:24 PM EDT	Flash Flood Warning	PHI	Chester	4 hr
Jul 28, 7:31 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Northampton	44 min
Jul 28, 7:55 PM EDT	Flash Flood Warning	PHI	Bucks, Montgomery	4 hr
Jul 28, 2:04 PM EDT	Flash Flood Warning	PHI	Warren	10 hr
Jul 28, 2:11 PM EDT	Flash Flood Warning	PHI	Hunterdon, Mercer, Somerset	4 hr
Jul 28, 2:45 PM EDT	Flash Flood Warning	PHI	Hunterdon, Morris, Warren	9 hr
Jul 28, 2:56 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Somerset, Sussex	49 min
Jul 28, 3:04 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex, Monmouth	41 min
Jul 28, 3:43 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Sussex, Warren	23 min
Jul 28, 4:02 PM EDT	Flash Flood Warning	PHI	Middlesex	2 hr
Jul 28, 6:10 PM EDT	Special Marine Warning	PHI		2 hr
Jul 28, 6:16 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Somerset	25 min
Jul 28, 6:55 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland, Gloucester, Salem	50 min
Jul 28, 7:23 PM EDT	Special Marine Warning	PHI		2 hr
Jul 28, 7:37 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cape May, Cumberland, Salem	23 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2026 Severe Thunderstorm Warnings in New Jersey, 2026 Every 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.