Alert archive / New Jersey / Special Weather Statements in 2021

Special Weather Statement, NWS Philadelphia/Mount Holly

July 16, 2021Warren County, New Jersey

NWS Philadelphia/Mount Holly issued this special weather statement at Jul 16, 2021, 6:46 PM EDT for Warren County, New Jersey. It was in force for 29 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 16, 2021, 6:46 PM EDT (22:46 UTC)
Expired: Jul 16, 2021, 7:15 PM EDT
In force: 29 min
Issued by: NWS Philadelphia/Mount Holly

County Warren County, NJ

The radar

The Philadelphia radar (KDIX), 103 km from the middle of the area, began a volume at 22:47 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.

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 10.8 hours before the alert went out and 169 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: 1044 J/kg
Mixed-layer CIN: -56 J/kg
Mixed-layer LCL: 994 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 108 m²/s²
0-3 km storm-relative helicity: 105 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

894 
WWUS81 KPHI 162246
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
646 PM EDT Fri Jul 16 2021

NJZ007>010-162315-
Hunterdon-Morris-Somerset-Warren-
646 PM EDT Fri Jul 16 2021

...A STRONG THUNDERSTORM WILL AFFECT NORTHERN HUNTERDON...
SOUTHWESTERN MORRIS...SOUTHERN WARREN AND NORTHWESTERN SOMERSET
COUNTIES...

At 645 PM EDT, a strong thunderstorm was located over Pleasant
Valley, or 9 miles east of Easton, moving east at 20 mph.

Wind gusts up to 40 mph and pea size hail are possible with this
storm.

Locations impacted include...
Hackettstown, Washington, High Bridge, Harmony, Oxford, Glen Gardner,
Hampton, Califon, Bloomsbury, Great Meadows-Vienna, Brass Castle,
Pleasant Valley, Long Valley, Roxburg, Beatyestown, Annandale, Budd
Lake, Allamuchy-Panther Valley and Beattyestown.

This includes the following highways...
 Interstate 78 in New Jersey between mile markers 5 and 11.
 Interstate 80 in New Jersey near mile marker 22.

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 4092 7477 4067 7467 4064 7510 4076 7516
      4092 7478
TIME...MOT...LOC 2245Z 253DEG 19KT 4074 7505 

$$

SFJ

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 16, 2:55 PM EDT	Areal Flood Advisory	PHI	Sussex	4 hr
Jul 16, 3:17 PM EDT	Flash Flood Watch	PHI	Atlantic, Burlington, Camden, Gloucester, Hunterdon, Mercer and 8 more	35 hr
Jul 16, 5:01 PM EDT	Areal Flood Advisory	PHI	Sussex	2 hr
Jul 16, 5:21 PM EDT	Flash Flood Warning	PHI	Sussex	2 hr
Jul 16, 5:25 PM EDT	Special Weather Statement	PHI	Sussex	35 min
Jul 16, 5:29 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	46 min
Jul 16, 5:34 PM EDT	Areal Flood Advisory	PHI	Sussex, Warren	112 min
Jul 16, 6:10 PM EDT	Special Weather Statement	PHI	Warren	35 min
Jul 16, 6:14 PM EDT	Special Weather Statement	PHI	Sussex	31 min
Jul 16, 6:27 PM EDT	Areal Flood Advisory	PHI	Sussex	59 min
Jul 16, 7:10 PM EDT	Special Weather Statement	PHI	Warren	35 min
Jul 16, 5:07 PM EDT	Special Weather Statement	PHI	Carbon	23 min
Jul 16, 5:21 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Lehigh, Monroe, Northampton	39 min
Jul 16, 5:38 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	20 min
Jul 16, 7:42 PM EDT	Special Weather Statement	PHI	Berks	33 min

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.