Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 119, NWS Philadelphia/Mount Holly

July 2, 20214 counties in Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 2, 2021, 5:44 PM EDT for 4 counties in Pennsylvania. It was in force for 46 min. 1 report 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 2, 2021, 5:44 PM EDT (21:44 UTC)
Expired
Jul 2, 2021, 6:30 PM EDT
In force
46 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 Philadelphia radar (KDIX), 139 km from the middle of the area, began a volume at 21:46 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

TimeReportWhereRemark
Jul 2, 5:46 PM EDTTSTM WND DMGLehighton, PAA COUPLE REPORTS OF DOWNED TREE LIMBS NEAR LEHIGHTON. 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, 9.7 hours before the alert went out and 231 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-pSkew-T log-p diagram, Brookhaven, NY at 12:00Z on 2021-07-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 51 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 12:00Z on 2021-07-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 11 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
51 J/kg
Mixed-layer CIN
-35 J/kg
Mixed-layer LCL
836 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
11 m²/s²
0-3 km storm-relative helicity
28 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.1

Open this sounding in Storm Lab

The text

As transmitted.

075 
WUUS51 KPHI 022144
SVRPHI
PAC025-077-089-095-022230-
/O.NEW.KPHI.SV.W.0119.210702T2144Z-210702T2230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
544 PM EDT Fri Jul 2 2021

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  North central Lehigh County in eastern Pennsylvania...
  Southeastern Carbon County in northeastern Pennsylvania...
  Southwestern Monroe County in northeastern Pennsylvania...
  West central Northampton County in eastern Pennsylvania...

* Until 630 PM EDT.

* At 543 PM EDT, a severe thunderstorm was located over Lehighton,
  moving east 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...
  Lehighton, Nazareth, Palmerton, Jim Thorpe, Slatington, Bath,
  Weatherly, Walnutport, Brodheadsville, Kunkletown, Gilbert,
  Rossland, Berlinsville, Emerald, Kresgeville, Sun Valley, Jonas,
  Meckesville, Danielsville and Beltzville State Park.

This includes Northeast Extension between mile markers 67 and 87.
 
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 this storm. Move indoors
immediately. Remember, if you can hear thunder, you are close enough
to be struck by lightning.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4074 7531 4071 7576 4073 7577 4074 7576
      4075 7577 4093 7585 4105 7537
TIME...MOT...LOC 2143Z 260DEG 15KT 4084 7570 

HAIL...0.75IN
WIND...60MPH
 
$$

Fitzsimmons
2 follow-up statements
828 
WWUS51 KPHI 022213
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
613 PM EDT Fri Jul 2 2021

PAC025-077-089-095-022230-
/O.CON.KPHI.SV.W.0119.000000T0000Z-210702T2230Z/
Lehigh PA-Carbon PA-Monroe PA-Northampton PA-
613 PM EDT Fri Jul 2 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR NORTH CENTRAL LEHIGH...SOUTHEASTERN CARBON...SOUTHWESTERN MONROE
AND WEST CENTRAL NORTHAMPTON COUNTIES...

At 612 PM EDT, a severe thunderstorm was located near Kresgeville, or
10 miles east of Lehighton, moving east at 20 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Damage to roofs, siding, trees, and power lines is 
         possible.

Locations impacted include...
Nazareth, Palmerton, Slatington, Bath, Walnutport, Brodheadsville,
Kunkletown, Gilbert, Rossland, Berlinsville, Kresgeville, Sun Valley,
Jonas, Danielsville, Beltzville State Park, McMichael, Penn Forest
Reservoir, Beersville, Christmans and Emerald.

This includes Northeast Extension between mile markers 67 and 69,
near mile marker 78, and between mile markers 80 and 86.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4072 7563 4097 7567 4102 7536 4074 7531
      4073 7541
TIME...MOT...LOC 2212Z 260DEG 16KT 4086 7552 

HAIL...<.75IN
WIND...60MPH
 
$$

Fitzsimmons
725 
WWUS51 KPHI 022225
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
625 PM EDT Fri Jul 2 2021

PAC025-077-089-095-022234-
/O.EXP.KPHI.SV.W.0119.000000T0000Z-210702T2230Z/
Lehigh PA-Carbon PA-Monroe PA-Northampton PA-
625 PM EDT Fri Jul 2 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL LEHIGH...
SOUTHEASTERN CARBON...SOUTHWESTERN MONROE AND WEST CENTRAL
NORTHAMPTON COUNTIES WILL EXPIRE AT 630 PM EDT...
        
The storm which prompted the warning has weakened below severe 
limits and is exiting the warned area. Therefore, the warning will 
be allowed to expire. However gusty winds are still possible with 
this thunderstorm.

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 4072 7563 4097 7567 4102 7536 4074 7531
      4073 7541
TIME...MOT...LOC 2224Z 260DEG 15KT 4087 7546 

$$

Fitzsimmons

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 2, 11:16 AM EDTAreal Flood AdvisoryPHIDelaware, Philadelphia119 min
Jul 2, 4:54 PM EDTFlash Flood WarningPHIMontgomery, Philadelphia5 hr
Jul 2, 5:29 PM EDTSpecial Weather StatementPHICarbon46 min
Jul 2, 6:42 PM EDTSpecial Weather StatementPHINorthampton48 min
Jul 2, 6:53 PM EDTSevere Thunderstorm WarningPHIMonroe, Northampton52 min
Jul 2, 7:41 PM EDTFlash Flood WarningPHIPhiladelphia3 hr

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2021Every severe thunderstorm warning in 2021

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.