Alert archive / New Jersey / Special Weather Statements in 2021

Special Weather Statement, NWS Philadelphia/Mount Holly

July 8, 2021Morris County, Warren County, New Jersey; Northampton County, Pennsylvania

NWS Philadelphia/Mount Holly issued this special weather statement at Jul 8, 2021, 5:29 PM EDT for Morris County, Warren County, New Jersey; Northampton County, Pennsylvania. It was in force for 46 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 8, 2021, 5:29 PM EDT (21:29 UTC)
Expired: Jul 8, 2021, 6:15 PM EDT
In force: 46 min
Issued by: NWS Philadelphia/Mount Holly

Counties Morris County, NJ, Warren County, NJ, Northampton County, PA

The radar

The Philadelphia radar (KDIX), 107 km from the middle of the area, began a volume at 21:33 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 8, 5:50 PM EDT	TSTM WND DMG	1 Ssw Flanders, NJ	TREES DOWN ON WIRES, RESULTING IN POWER OUTAGES NEAR CHESTER TOWNSHIP.
Jul 8, 6:13 PM EDT	TSTM WND DMG	1 Nnw Washington, NJ	DOWNED TREE ON NJ 31 NORTHBOUND NORTH OF NJ 57/WASHINGTON AVE (WASHINGTON TWP) ALL LANES CLOSED. TIME ESTIMATED FROM RADAR.
Jul 8, 6:16 PM EDT	TSTM WND DMG	3 Sse Columbia, NJ	DOWNED TREE ON US 46 EASTBOUND CR 616/KNOWLTON RD (KNOWLTON TWP) ALL LANES CLOSED. TIME ESTIMATED FROM RADAR.
Jul 8, 6:16 PM EDT	TSTM WND DMG	Tewksbury Twp, NJ	TREES WERE DOWNED IN TEWKSBURY TWP. TIME ESTIMATED FROM RADAR AND DISPATCH REPORTS.

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, 9.5 hours before the alert went out and 150 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: 973 J/kg
Mixed-layer CIN: -77 J/kg
Mixed-layer LCL: 751 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 60 m²/s²
0-3 km storm-relative helicity: 93 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.3

Open this sounding in Storm Lab

The text

As transmitted.

956 
WWUS81 KPHI 082129
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
529 PM EDT Thu Jul 8 2021

NJZ001-007>010-PAZ062-105-082215-
Hunterdon-Morris-Sussex-Somerset-Warren-Upper Bucks-Northampton-
529 PM EDT Thu Jul 8 2021

...A STRONG THUNDERSTORM WILL AFFECT NORTHERN HUNTERDON...MORRIS...
SOUTHWESTERN SUSSEX...WARREN...NORTHWESTERN SOMERSET...NORTH CENTRAL
BUCKS AND EASTERN NORTHAMPTON COUNTIES...

At 529 PM EDT, a group of strong thunderstorms were located near 
Califon, or 17 miles northwest of Somerville, moving northeast at 40 
mph.

Wind gusts up to 40 mph and pea size hail are possible with these 
storms.

Locations impacted include...
Easton, Morristown, Newton, Bethlehem, Dover, Madison, Hopatcong,
Forks, East Hanover, Hackettstown, Boonton, Wilson, Wharton,
Washington, Rockaway, Blairstown, Nazareth, Morris Plains, Bangor and
Mount Arlington.

This includes the following highways...
 Interstate 78 in Pennsylvania between mile markers 69 and 76.
 Interstate 78 in New Jersey between mile markers 0 and 25.
 Interstate 80 in New Jersey between mile markers 4 and 48.
 Interstate 287 in New Jersey between mile markers 31 and 48.

LAT...LON 4105 7449 4104 7450 4104 7448 4090 7433
      4088 7434 4086 7432 4081 7435 4065 7473
      4054 7526 4071 7543 4092 7515 4115 7459
TIME...MOT...LOC 2129Z 222DEG 33KT 4074 7484 

$$

NC

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 7, 11:06 PM EDT	Tropical Storm Warning	PHI	Atlantic, Burlington, Cape May, Monmouth, Ocean	32 hr
Jul 7, 11:37 PM EDT	Special Weather Statement	PHI	Sussex	38 min
Jul 8, 5:27 AM EDT	Small Craft Advisory	PHI		34 hr
Jul 8, 1:49 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Somerset	41 min
Jul 8, 2:09 PM EDT	Special Marine Warning	PHI		81 min
Jul 8, 2:26 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth, Ocean	21 min
Jul 8, 2:29 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Somerset, Warren	46 min
Jul 8, 2:43 PM EDT	Rip Current Statement	PHI	Atlantic, Cape May, Monmouth, Ocean	27 hr
Jul 8, 3:03 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Middlesex, Morris, Somerset	42 min
Jul 8, 4:02 PM EDT	Special Marine Warning	PHI		33 min
Jul 8, 4:02 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth	31 min
Jul 8, 4:43 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex, Somerset	16 min
Jul 8, 5:34 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Sussex, Warren	41 min
Jul 8, 6:06 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon	39 min
Jul 8, 6:09 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Somerset, Sussex	51 min
Jul 8, 6:16 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Sussex, Warren	44 min
Jul 7, 11:11 PM EDT	Special Weather Statement	PHI	Monroe	49 min
Jul 8, 8:53 AM EDT	Special Weather Statement	PHI	Monroe	52 min
Jul 8, 9:31 AM EDT	Areal Flood Advisory	PHI	Carbon, Monroe	119 min
Jul 8, 9:46 AM EDT	Special Weather Statement	PHI	Monroe	44 min
Jul 8, 3:50 PM EDT	Special Weather Statement	PHI	Berks	25 min
Jul 8, 4:06 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Montgomery	39 min
Jul 8, 4:25 PM EDT	Severe Thunderstorm Warning	PHI	Berks	50 min
Jul 8, 4:45 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Lehigh, Montgomery, Northampton	45 min
Jul 8, 4:51 PM EDT	Severe Thunderstorm Warning	PHI	Berks	54 min
Jul 8, 5:11 PM EDT	Special Weather Statement	PHI	Lehigh	34 min
Jul 8, 5:21 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	39 min
Jul 8, 5:52 PM EDT	Special Weather Statement	PHI	Berks	23 min

Nearby

Special Weather Statements in New Jersey, 2021 Special Weather Statements in Pennsylvania, 2021 Every special weather statement 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.