Alert archive / New Jersey / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 164, NWS Philadelphia/Mount Holly

July 22, 20204 counties in New Jersey; Bucks County, Monroe County, Northampton County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 22, 2020, 5:16 PM EDT for 4 counties in New Jersey; Bucks County, Monroe County, Northampton County, Pennsylvania. It was in force for 59 min. 9 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 22, 2020, 5:16 PM EDT (21:16 UTC)
Expired: Jul 22, 2020, 6:15 PM EDT
In force: 59 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 70.0 mph

Counties Hunterdon County, NJ, Morris County, NJ, Sussex County, NJ, Warren County, NJ, Bucks County, PA, Monroe County, PA, Northampton County, PA

The radar

The Philadelphia radar (KDIX), 123 km from the middle of the area, began a volume at 21:18 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 22, 5:18 PM EDT	TSTM WND DMG	1 Nw Liberty Twp, NJ	DOWNED TREES AND WIRES NEAR HISSIM ROAD IN LIBERTY TWP. TIME ESTIMATED FROM RADAR.
Jul 22, 5:21 PM EDT	TSTM WND DMG	1 Wnw Upper Mount Bethe, PA	DOWNED WIRES NEAR HEIDEN ROAD IN MOUNT BETHEL. TIME ESTIMATED FROM RADAR.
Jul 22, 5:21 PM EDT	TSTM WND DMG	3 Sse Columbia, NJ	DOWNED TREES AND WIRES NEAR SYCAMORE LANE AND U.S. HIGHWAY 46 IN RAMSEYSBURG. TIME ESTIMATED FROM RADAR.
Jul 22, 5:30 PM EDT	TSTM WND DMG	5 Wnw Blairstown, NJ	DOWNED TREES AND WIRES NEAR OLD MINE ROAD IN DELAWARE WATER GAP NATIONAL RECREATION AREA. TIME ESTIMATED FROM RADAR.
Jul 22, 5:37 PM EDT	TSTM WND DMG	2 Ne Stewartsville, NJ	DOWNED TREE ON STATE HIGHWAY 57 WEST OF ASBURY BROADWAY ROAD IN FRANKLIN TWP. TIME ESTIMATED FROM RADAR.
Jul 22, 5:54 PM EDT	TSTM WND DMG	1 N Frelinghuysen Twp, NJ	DOWNED TREE ON STATE HIGHWAY 94 SOUTH OF RAMSEY ROAD IN FRELINGHUYSEN TWP. TIME ESTIMATED FROM RADAR.
Jul 22, 5:54 PM EDT	TSTM WND DMG	Hampton, NJ	DOWNED TREES AND WIRES NEAR NEW STREET IN HAMPTON. TIME ESTIMATED FROM RADAR.
Jul 22, 6:02 PM EDT	TSTM WND DMG	4 Ese Frenchtown, NJ	DOWNED TREES AND WIRES NEAR FITZER ROAD SOUTHEAST OF FRENCHTOWN. TIME ESTIMATED FROM RADAR.
Jul 22, 6:02 PM EDT	TSTM WND DMG	Lebanon Twp, NJ	DOWNED TREES AND WIRES NEAR WOODGLEN. 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 22, 2:57 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 9.3 hours before the alert went out and 177 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: 15 J/kg
Mixed-layer CIN: -173 J/kg
Mixed-layer LCL: 1410 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 111 m²/s²
0-3 km storm-relative helicity: 183 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

As transmitted.

076 
WUUS51 KPHI 222116
SVRPHI
NJC019-027-037-041-PAC017-089-095-222215-
/O.NEW.KPHI.SV.W.0164.200722T2116Z-200722T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
516 PM EDT Wed Jul 22 2020

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  West central Morris County in northern New Jersey...
  Northwestern Hunterdon County in northwestern New Jersey...
  Southwestern Sussex County in northwestern New Jersey...
  Warren County in northwestern New Jersey...
  North central Bucks County in southeastern Pennsylvania...
  East central Monroe County in northeastern Pennsylvania...
  Eastern Northampton County in eastern Pennsylvania...

* Until 615 PM EDT.

* At 515 PM EDT, a severe thunderstorm was located near Oxford, or 17
  miles southwest of Newton, moving northeast at 15 mph.

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

  SOURCE...Radar indicated.

  IMPACT...Expect considerable tree damage. Damage is likely to 
           mobile homes, roofs, and outbuildings.

* Locations impacted include...
  Easton, Newton, Hackettstown, Washington, Blairstown, High Bridge,
  Clinton, Belvidere, Harmony, Oxford, Alpha, Hope, Glen Gardner,
  Ferndale, Hampton, Frenchtown, West Easton, Milford, Califon and
  Bloomsbury.

This includes the following highways...
 Interstate 78 in Pennsylvania between mile markers 75 and 76.
 Interstate 78 in New Jersey between mile markers 0 and 18.
 Interstate 80 in New Jersey between mile markers 0 and 23.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Protecting yourself from immediate threats to life and safety shall
take priority.  Whenever possible, as long as it does not cause
greater harm, all COVID-19 protective action guidance should be
followed.

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 4108 7467 4051 7493 4051 7528 4114 7510
      4113 7506 4108 7503 4109 7500 4115 7492
TIME...MOT...LOC 2115Z 241DEG 12KT 4086 7497 

HAIL...0.75IN
WIND...70MPH
 
$$

Meola

1 follow-up statement

621 
WWUS51 KPHI 222206
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
606 PM EDT Wed Jul 22 2020

NJC019-027-037-041-PAC017-089-095-222216-
/O.EXP.KPHI.SV.W.0164.000000T0000Z-200722T2215Z/
Morris NJ-Hunterdon NJ-Sussex NJ-Warren NJ-Bucks PA-Monroe PA-
Northampton PA-
606 PM EDT Wed Jul 22 2020

...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL MORRIS...
NORTHWESTERN HUNTERDON...SOUTHWESTERN SUSSEX...WARREN...NORTH CENTRAL
BUCKS...EAST CENTRAL MONROE AND EASTERN NORTHAMPTON COUNTIES WILL
EXPIRE AT 615 PM EDT...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.  However gusty winds and heavy rain are still
possible with this thunderstorm.

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

LAT...LON 4108 7467 4051 7493 4051 7528 4114 7510
      4113 7506 4108 7503 4109 7500 4115 7492
TIME...MOT...LOC 2206Z 241DEG 12KT 4094 7478 

$$

Meola

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 21, 10:57 PM EDT	Special Marine Warning	PHI		63 min
Jul 22, 2:10 PM EDT	Severe Thunderstorm Warning	PHI	Warren	50 min
Jul 22, 3:04 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	30 min
Jul 22, 3:18 PM EDT	Special Weather Statement	PHI	Morris, Warren	42 min
Jul 22, 3:50 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Sussex, Warren	29 min
Jul 22, 4:33 PM EDT	Special Weather Statement	PHI	Morris	57 min
Jul 22, 4:56 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Somerset	49 min
Jul 22, 5:23 PM EDT	Areal Flood Advisory	PHI	Warren	3 hr
Jul 22, 5:33 PM EDT	Severe Thunderstorm Warning	PHI	Gloucester	57 min
Jul 22, 5:40 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Hunterdon, Mercer, Somerset	65 min
Jul 22, 5:49 PM EDT	Special Marine Warning	PHI		86 min
Jul 22, 5:54 PM EDT	Severe Thunderstorm Warning	PHI	Gloucester, Salem	51 min
Jul 22, 6:04 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Middlesex, Morris, Somerset, Sussex, Warren	60 min
Jul 22, 6:12 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester, Salem	48 min
Jul 22, 6:17 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Mercer, Middlesex, Monmouth, Ocean, Somerset	52 min
Jul 22, 6:46 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Camden, Cape May, Cumberland, Gloucester, Salem	44 min
Jul 22, 6:47 PM EDT	Special Marine Warning	PHI		28 min
Jul 22, 6:52 PM EDT	Areal Flood Advisory	PHI	Middlesex, Somerset	113 min
Jul 22, 6:52 PM EDT	Special Marine Warning	PHI		41 min
Jul 22, 7:20 PM EDT	Special Marine Warning	PHI		55 min
Jul 22, 7:23 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 1 more	52 min
Jul 22, 7:58 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Ocean	47 min
Jul 22, 7:59 PM EDT	Special Marine Warning	PHI		61 min
Jul 21, 8:45 PM EDT	Special Weather Statement	PHI	Berks	30 min
Jul 21, 9:20 PM EDT	Special Weather Statement	PHI	Montgomery	25 min
Jul 22, 1:36 PM EDT	Special Weather Statement	PHI	Carbon	24 min
Jul 22, 1:58 PM EDT	Special Weather Statement	PHI	Monroe	32 min
Jul 22, 3:29 PM EDT	Special Weather Statement	PHI	Lebanon	46 min
Jul 22, 3:39 PM EDT	Severe Thunderstorm Warning	PHI	Berks	51 min
Jul 22, 4:01 PM EDT	Severe Thunderstorm Warning	PHI	Chester	22 min
Jul 22, 4:10 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Carbon, Lehigh, Northampton	65 min
Jul 22, 4:25 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Chester, Lehigh, Montgomery	50 min
Jul 22, 4:38 PM EDT	Severe Thunderstorm Warning	PHI	Chester	52 min
Jul 22, 4:49 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Carbon, Lehigh, Monroe, Northampton	56 min
Jul 22, 5:09 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Chester, Delaware, Lehigh, Montgomery and 1 more	66 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2020 Severe Thunderstorm Warnings in Pennsylvania, 2020 Every severe thunderstorm warning in 2020

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.