Alert archive / New Jersey / Special Weather Statements in 2021

Special Weather Statement, NWS Philadelphia/Mount Holly

July 14, 2021Morris County, New Jersey

NWS Philadelphia/Mount Holly issued this special weather statement at Jul 14, 2021, 3:42 PM EDT for Morris County, New Jersey. It was in force for 18 min. 2 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 14, 2021, 3:42 PM EDT (19:42 UTC)
Expired: Jul 14, 2021, 4:00 PM EDT
In force: 18 min
Issued by: NWS Philadelphia/Mount Holly

County Morris County, NJ

The radar

The Philadelphia radar (KDIX), 88 km from the middle of the area, began a volume at 19:42 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 14, 3:55 PM EDT	TSTM WND DMG	1 Sw Chatham, NJ	FOUR UTILITY POLES WERE TOPPLED ON THE SOUTH SIDE OF CHATHAM. ALSO, A TREE FELL AGAINST A BUILDING.
Jul 14, 3:55 PM EDT	TSTM WND DMG	Chatham, NJ	DOWNED TREES AND POWER LINES IN CHATHAM. 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, 7.7 hours before the alert went out and 131 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: 1588 J/kg
Mixed-layer CIN: -86 J/kg
Mixed-layer LCL: 506 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 39 m²/s²
0-3 km storm-relative helicity: 86 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.4

Open this sounding in Storm Lab

The text

As transmitted.

878 
WWUS81 KPHI 141942
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
342 PM EDT Wed Jul 14 2021

NJZ008-010-142000-
Morris-Somerset-
342 PM EDT Wed Jul 14 2021

...A STRONG THUNDERSTORM WILL AFFECT SOUTHEASTERN MORRIS AND
NORTHEASTERN SOMERSET COUNTIES...

At 341 PM EDT, a strong thunderstorm was located over Madison, or
near Morristown, moving east at 25 mph.

Wind gusts up to 40 mph and half inch hail are possible with this
storm.

Locations impacted include...
Morristown, Madison, Florham Park, East Hanover, Chatham, Morris
Plains, Millington, Basking Ridge, Bernardsville, Watchung and
Hanover Township.

This includes the following highways...
 Interstate 78 in New Jersey between mile markers 34 and 42.
 Interstate 287 in New Jersey between mile markers 26 and 40.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

LAT...LON 4082 7434 4079 7437 4076 7438 4075 7436
      4074 7437 4067 7446 4066 7445 4066 7440
      4063 7442 4064 7460 4084 7455 4084 7433
TIME...MOT...LOC 1941Z 277DEG 22KT 4074 7446 

$$

Fitzsimmons

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 14, 5:47 PM EDT	Special Marine Warning	PHI		43 min
Jul 14, 5:54 PM EDT	Special Weather Statement	PHI	Ocean	51 min
Jul 14, 6:41 PM EDT	Special Weather Statement	PHI	Monmouth	34 min
Jul 14, 7:03 PM EDT	Special Marine Warning	PHI		61 min
Jul 14, 7:03 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth	42 min
Jul 14, 7:24 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex, Monmouth	36 min
Jul 14, 7:26 PM EDT	Areal Flood Advisory	PHI	Middlesex, Monmouth	2 hr
Jul 14, 7:37 PM EDT	Flash Flood Warning	PHI	Monmouth	3 hr

Nearby

Special Weather Statements in New Jersey, 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.