Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2024

Severe Thunderstorm Warning 8, NWS Philadelphia/Mount Holly

April 30, 20244 counties in Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Apr 30, 2024, 6:52 PM EDT for 4 counties in Pennsylvania. It was in force for 53 min. 8 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: Apr 30, 2024, 6:52 PM EDT (22:52 UTC)
Expired: Apr 30, 2024, 7:45 PM EDT
In force: 53 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Carbon County, PA, Lehigh County, PA, Monroe County, PA, Northampton County, PA

The radar

The Binghamton radar (KBGM), 140 km from the middle of the area, began a volume at 22:56 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
Apr 30, 7:18 PM EDT	HAIL 0.25	Jonas, PA	Time estimated from radar.
Apr 30, 7:35 PM EDT	HAIL 0.25	Slatington, PA
Apr 30, 7:35 PM EDT	HAIL 0.7	Emerald, PA
Apr 30, 7:35 PM EDT	HAIL 1	Slatington, PA	Updates previous hail report in Slatington.
Apr 30, 7:39 PM EDT	HAIL 0.25	Lehigh Twp, PA
Apr 30, 7:45 PM EDT	HAIL 1	North Whitehall Twp, PA	Report from CoCoRaHS station Schnecksville 1.7 ENE.
Apr 30, 7:46 PM EDT	HAIL 0.5	2 W Northampton, PA
Apr 30, 7:49 PM EDT	TSTM WND DMG	Moore Twp, PA	A few trees reported down across Moore Township. Power outages in the area as well. Time estimated from radar.

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, 10.9 hours before the alert went out and 235 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 609 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 75 m²/s²
0-3 km storm-relative helicity: 97 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

517 
WUUS51 KPHI 302252
SVRPHI
PAC025-077-089-095-302345-
/O.NEW.KPHI.SV.W.0008.240430T2252Z-240430T2345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
652 PM EDT Tue Apr 30 2024

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...
  Southern Monroe County in northeastern Pennsylvania...
  West central Northampton County in eastern Pennsylvania...

* Until 745 PM EDT.

* At 652 PM EDT, severe thunderstorms were located along a line
  extending from Blakeslee to Nesquehoning, moving east at 25 mph.

  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...
  Lehighton, Mount Pocono, Palmerton, Jim Thorpe, Slatington,
  Nesquehoning, Weatherly, Walnutport, Neffs, Pocono Pines,
  Coffeetown, Lake Harmony, Tannersville, Long Pond, Kresgeville, Sun
  Valley, Reeders, Beltzville State Park, Saylorsburg, and McMichael.

This includes the following highways...
 Northeast Extension between mile markers 61 and 95.
 Interstate 80 in Pennsylvania between mile markers 279 and 308.
 Interstate 380 in Pennsylvania between mile markers 0 and 5.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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 4112 7509 4062 7560 4072 7579 4074 7576
      4081 7587 4087 7594 4098 7582 4098 7580
      4101 7573 4103 7574 4104 7576 4113 7567
      4112 7565 4116 7560
TIME...MOT...LOC 2252Z 291DEG 20KT 4109 7560 4085 7585 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Staarmann

2 follow-up statements

757 
WWUS51 KPHI 302312
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
712 PM EDT Tue Apr 30 2024

PAC025-077-089-095-302345-
/O.CON.KPHI.SV.W.0008.000000T0000Z-240430T2345Z/
Lehigh PA-Carbon PA-Monroe PA-Northampton PA-
712 PM EDT Tue Apr 30 2024

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM EDT
FOR NORTHWESTERN LEHIGH...CARBON...CENTRAL MONROE AND WEST CENTRAL
NORTHAMPTON COUNTIES...

At 712 PM EDT, severe thunderstorms were located along a line
extending from Meckesville to near New Mahoning, moving southeast at
25 mph.

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...
Lehighton, Mount Pocono, Palmerton, Jim Thorpe, Slatington,
Nesquehoning, Walnutport, Neffs, Coffeetown, Lake Harmony,
Tannersville, Long Pond, Kresgeville, Sun Valley, Reeders, Beltzville
State Park, Saylorsburg, McMichael, Penn Forest Reservoir, and
Schnecksville.

This includes the following highways...
 Northeast Extension between mile markers 61 and 90.
 Interstate 80 in Pennsylvania between mile markers 288 and 308.
 Interstate 380 in Pennsylvania between mile markers 0 and 2.

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 4082 7588 4110 7556 4112 7512 4112 7509
      4062 7560 4072 7579 4074 7576 4081 7587
TIME...MOT...LOC 2312Z 295DEG 20KT 4101 7552 4079 7575 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Staarmann

451 
WWUS51 KPHI 302334
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
734 PM EDT Tue Apr 30 2024

PAC025-077-089-095-302345-
/O.CON.KPHI.SV.W.0008.000000T0000Z-240430T2345Z/
Lehigh PA-Carbon PA-Monroe PA-Northampton PA-
734 PM EDT Tue Apr 30 2024

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM EDT
FOR NORTHWESTERN LEHIGH...SOUTHEASTERN CARBON...SOUTHERN MONROE AND
WEST CENTRAL NORTHAMPTON COUNTIES...

At 734 PM EDT, severe thunderstorms were located along a line
extending from Analomink to Berlinsville to Schnecksville, moving
east at 25 mph.

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...
Lehighton, Palmerton, Slatington, Walnutport, Henryville,
Brodheadsville, Kunkletown, Neffs, Gilbert, Coffeetown, Tannersville,
Rossland, Berlinsville, Emerald, Kresgeville, Sun Valley, Jonas,
Reeders, Danielsville, and Beltzville State Park.

This includes the following highways...
 Northeast Extension between mile markers 61 and 79.
 Interstate 80 in Pennsylvania between mile markers 298 and 308.
 Interstate 380 in Pennsylvania near mile marker 0.

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 4080 7575 4106 7545 4112 7512 4112 7509
      4062 7560 4072 7579 4074 7576
TIME...MOT...LOC 2334Z 290DEG 20KT 4104 7521 4077 7559 4067 7564 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Staarmann

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 30, 5:00 PM EDT	Special Weather Statement	PHI	Carbon	30 min
Apr 30, 5:32 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	30 min
Apr 30, 6:30 PM EDT	Special Weather Statement	PHI	Carbon, Monroe	45 min
Apr 30, 7:38 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Carbon, Lehigh, Monroe, Northampton	52 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2024 Every 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.