Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 125, NWS Philadelphia/Mount Holly

July 6, 2021Carbon County, Monroe County, Northampton County, Pennsylvania; Morris County, Sussex County, Warren County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 6, 2021, 5:15 PM EDT for Carbon County, Monroe County, Northampton County, Pennsylvania; Morris County, Sussex County, Warren County, New Jersey. It was in force for 60 min. 19 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 6, 2021, 5:15 PM EDT (21:15 UTC)
Expired: Jul 6, 2021, 6:15 PM EDT
In force: 60 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 1.0 in
Wind: 70.0 mph

Counties Morris County, NJ, Sussex County, NJ, Warren County, NJ, Carbon County, PA, Monroe County, PA, Northampton County, PA

The radar

The Philadelphia radar (KDIX), 127 km from the middle of the area, began a volume at 21:17 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 6, 5:25 PM EDT	TSTM WND DMG	Frankford Twp, NJ	MULTIPLE TREES DOWN; TIME ESTIMATED FROM RADAR, CORRECTED TO INDICATE DAMAGE WAS FROM THUNDERSTORMS.
Jul 6, 5:31 PM EDT	TSTM WND DMG	1 Nne Sciota, PA	TREE DOWN IN WIRES.
Jul 6, 5:31 PM EDT	NON-TSTM WND DMG	1 Nne Sciota, PA	TREE DOWN IN WIRES.
Jul 6, 5:33 PM EDT	TSTM WND DMG	Newton, NJ	PHOTOS OF SEVERAL LARGE BRANCHES DOWN. TIME ESTIMATED FROM RADAR. REPORT VIA SOCIAL MEDIA.
Jul 6, 5:36 PM EDT	TSTM WND GST 48	High Point, NJ
Jul 6, 5:38 PM EDT	HAIL 1	Green Twp, NJ	VIDEO OF UP TO QUARTER SIZE HAIL. TIME ESTIMATED FROM RADAR.
Jul 6, 5:42 PM EDT	TSTM WND DMG	Fredon Twp, NJ	A FEW LARGE BRANCHES DOWN. TIME ESTIMATED FROM RADAR. REPORT VIA SOCIAL MEDIA.
Jul 6, 5:45 PM EDT	TSTM WND DMG	Sparta, NJ	TREES AND WIRES, POWER POLES DOWN. TIME ESTIMATED FROM RADAR.
Jul 6, 5:46 PM EDT	TSTM WND DMG	1 N Delaware Water Gap, PA	A FEW DOWN TREES. REPORT VIA SOCIAL MEDIA. TIME ESTIMATED FROM RADAR.
Jul 6, 5:46 PM EDT	TSTM WND DMG	1 Wsw Hardyston Twp, NJ	PHOTO OF LARGE LIMB DOWN ON POWER LINES ON SOCIAL MEDIA. TIME ESTIMATED FROM RADAR.
Jul 6, 5:50 PM EDT	TSTM WND DMG	Jefferson Twp, NJ	PHOTO OF BRANCH DOWN IN YARD ON SOCIAL MEDIA. TIME ESTIMATED FROM RADAR.
Jul 6, 5:50 PM EDT	TSTM WND DMG	Jefferson Twp, NJ	TREES AND WIRES DOWN. NORTH BEACH ROAD CLOSED DUE TO DOWNED UTILITY POLE. BRADY ROAD FROM NORTH CHERRY TO ESPANONG ROAD CLOSED DUE TO DOWN TREE / LINES. TIME ESTIMATED FROM RADAR.
Jul 6, 5:53 PM EDT	TSTM WND DMG	Saylorsburg, PA	TREE DOWN IN WIRES.
Jul 6, 5:53 PM EDT	HAIL 1	1 Ese Brodheadsville, PA	MPING REPORT OF QUARTER SIZE HAIL.
Jul 6, 5:53 PM EDT	HAIL 1	1 Ese Brodheadsville, PA	REPORT FROM MPING: QUARTER (1.00 IN.).
Jul 6, 5:55 PM EDT	TSTM WND DMG	Highland Lakes, NJ	SEVERAL BRANCHES AND LIMBS DOWN. TIME ESTIMATED FROM RADAR.
Jul 6, 5:58 PM EDT	TSTM WND DMG	1 E Pen Argyl, PA	TREE DOWN. REPORT VIA SOCIAL MEDIA. T ESTIMATED FROM RADAR.
Jul 6, 6:00 PM EDT	TSTM WND DMG	Rockaway, NJ	MULTIPLE TREES DOWN, CORRECTED TO INDICATE DAMAGE WAS FROM THUNDERSTORM.
Jul 6, 6:19 PM EDT	TSTM WND DMG	2 E Brodheadsville, PA	TREE DOWN IN WIRES.

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 6, 1:32 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 9.3 hours before the alert went out and 164 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: 230 J/kg
Mixed-layer CIN: -195 J/kg
Mixed-layer LCL: 1202 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 139 m²/s²
0-3 km storm-relative helicity: 184 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

995 
WUUS51 KPHI 062115
SVRPHI
NJC027-037-041-PAC025-089-095-062215-
/O.NEW.KPHI.SV.W.0125.210706T2115Z-210706T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
515 PM EDT Tue Jul 6 2021

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Central Morris County in northern New Jersey...
  Sussex County in northwestern New Jersey...
  Warren County in northwestern New Jersey...
  East central Carbon County in northeastern Pennsylvania...
  Southern Monroe County in northeastern Pennsylvania...
  Northern Northampton County in eastern Pennsylvania...

* Until 615 PM EDT.

* At 515 PM EDT, severe thunderstorms were located along a line
  extending from near Dingmans Ferry to East Stroudsburg to Sun
  Valley, moving east at 40 mph.

  HAZARD...70 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Minor damage to vehicles is possible. Expect considerable 
           tree damage. Wind damage is also likely to mobile homes, 
           roofs, and outbuildings.

* Locations impacted include...
  Easton, Newton, Montague, Dover, Hopatcong, Forks, Kinnelon, East
  Stroudsburg, Hackettstown, Boonton, Wilson, Butler, Wharton,
  Washington, Rockaway, Blairstown, Nazareth, Bangor, Mount Arlington
  and Franklin.

This includes the following highways...
 Northeast Extension between mile markers 79 and 86.
 Interstate 80 in Pennsylvania between mile markers 304 and 314.
 Interstate 80 in New Jersey between mile markers 0 and 42.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 4120 7436 4110 7449 4104 7450 4105 7445
      4102 7443 4100 7432 4086 7445 4077 7486
      4078 7490 4075 7493 4068 7522 4094 7583
      4103 7530 4115 7514 4114 7509 4109 7501
      4116 7490 4129 7483 4135 7475 4136 7470
TIME...MOT...LOC 2115Z 284DEG 36KT 4119 7498 4101 7517 4098 7548 

HAIL...1.00IN
WIND...70MPH
 
$$

Staarmann

2 follow-up statements

261 
WWUS51 KPHI 062150
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
550 PM EDT Tue Jul 6 2021

NJC027-037-041-PAC025-089-095-062215-
/O.CON.KPHI.SV.W.0125.000000T0000Z-210706T2215Z/
Morris NJ-Sussex NJ-Warren NJ-Carbon PA-Monroe PA-Northampton PA-
550 PM EDT Tue Jul 6 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR CENTRAL MORRIS...SUSSEX...WARREN...EAST CENTRAL CARBON...SOUTHERN
MONROE AND NORTHERN NORTHAMPTON COUNTIES...

At 550 PM EDT, severe thunderstorms were located along a line
extending from near Highland Lake to Budd Lake to near Kunkletown,
moving east at 45 mph.

HAZARD...70 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Minor damage to vehicles is possible. Expect considerable 
         tree damage. Wind damage is also likely to mobile homes, 
         roofs, and outbuildings.

Locations impacted include...
Easton, Newton, Dover, Hopatcong, Forks, Kinnelon, East Stroudsburg,
Hackettstown, Boonton, Wilson, Butler, Wharton, Washington, Rockaway,
Blairstown, Nazareth, Bangor, Mount Arlington, Franklin and Jim
Thorpe.

This includes the following highways...
 Northeast Extension between mile markers 79 and 86.
 Interstate 80 in Pennsylvania between mile markers 305 and 314.
 Interstate 80 in New Jersey between mile markers 0 and 42.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail and damaging winds. People outside
should seek shelter inside a well-built structure and away from
windows.

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

&&

LAT...LON 4101 7541 4103 7489 4130 7456 4120 7436
      4110 7449 4104 7450 4105 7445 4102 7443
      4100 7432 4086 7445 4077 7486 4078 7490
      4075 7493 4068 7522 4094 7583
TIME...MOT...LOC 2150Z 285DEG 38KT 4117 7451 4087 7473 4082 7548 

HAIL...1.00IN
WIND...70MPH
 
$$

Staarmann

991 
WWUS51 KPHI 062204
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
604 PM EDT Tue Jul 6 2021

PAC025-089-062213-
/O.CAN.KPHI.SV.W.0125.000000T0000Z-210706T2215Z/
Carbon PA-Monroe PA-
604 PM EDT Tue Jul 6 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL CARBON AND
SOUTHERN MONROE COUNTIES IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
northern and northwestern New Jersey...and eastern and northeastern
Pennsylvania.

LAT...LON 4120 7436 4109 7450 4104 7450 4105 7445
      4102 7443 4100 7432 4086 7445 4077 7486
      4078 7490 4075 7493 4068 7522 4081 7551
      4092 7507 4100 7459 4126 7450
TIME...MOT...LOC 2203Z 285DEG 38KT 4102 7433 4079 7452 4079 7532 

$$

NJC027-037-041-PAC095-062215-
/O.CON.KPHI.SV.W.0125.000000T0000Z-210706T2215Z/
Morris NJ-Sussex NJ-Warren NJ-Northampton PA-
604 PM EDT Tue Jul 6 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR CENTRAL MORRIS...SOUTHEASTERN SUSSEX...CENTRAL WARREN AND
NORTHERN NORTHAMPTON COUNTIES...

At 603 PM EDT, severe thunderstorms were located along a line
extending from Bloomingdale to near Morristown to near Belfast,
moving east at 45 mph.

HAZARD...70 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Minor damage to vehicles is possible. Expect considerable 
         tree damage. Wind damage is also likely to mobile homes, 
         roofs, and outbuildings.

Locations impacted include...
Easton, Dover, Hopatcong, Forks, Kinnelon, Hackettstown, Boonton,
Wilson, Butler, Wharton, Washington, Rockaway, Nazareth, Bangor,
Mount Arlington, Mountain Lakes, Stanhope, Pen Argyl, Netcong and
Wind Gap.

This includes Interstate 80 in New Jersey between mile markers 11 and
42.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail and damaging winds. People outside
should seek shelter inside a well-built structure and away from
windows.

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

&&

LAT...LON 4120 7436 4109 7450 4104 7450 4105 7445
      4102 7443 4100 7432 4086 7445 4077 7486
      4078 7490 4075 7493 4068 7522 4081 7551
      4092 7507 4100 7459 4126 7450
TIME...MOT...LOC 2203Z 285DEG 38KT 4102 7433 4079 7452 4079 7532 

HAIL...1.00IN
WIND...70MPH
 
$$

Staarmann

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 6, 4:23 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Montgomery	52 min
Jul 6, 4:29 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	76 min
Jul 6, 5:08 PM EDT	Special Weather Statement	PHI	Carbon	37 min
Jul 6, 5:11 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	49 min
Jul 6, 5:34 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	41 min
Jul 6, 5:55 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Lehigh, Northampton	65 min
Jul 6, 6:13 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	31 min
Jul 6, 6:41 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	64 min
Jul 6, 7:01 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	59 min
Jul 6, 7:50 PM EDT	Special Weather Statement	PHI	Lehigh	25 min
Jul 6, 3:53 AM EDT	Small Craft Advisory	PHI		22 hr
Jul 6, 5:46 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Somerset, Sussex, Warren	59 min
Jul 6, 6:17 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Middlesex, Monmouth, Somerset	58 min
Jul 6, 6:33 PM EDT	Special Marine Warning	PHI		117 min
Jul 6, 7:59 PM EDT	Severe Thunderstorm Warning	PHI	Mercer, Middlesex, Monmouth, Ocean, Somerset	61 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2021 Severe Thunderstorm Warnings in New Jersey, 2021 Every 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.