Alert archive / New Jersey / Special Weather Statements in 2021

Special Weather Statement, NWS Philadelphia/Mount Holly

July 16, 2021Sussex County, New Jersey; Monroe County, Pennsylvania

NWS Philadelphia/Mount Holly issued this special weather statement at Jul 16, 2021, 5:25 PM EDT for Sussex County, New Jersey; Monroe County, Pennsylvania. It was in force for 35 min. 1 report 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 16, 2021, 5:25 PM EDT (21:25 UTC)
Expired: Jul 16, 2021, 6:00 PM EDT
In force: 35 min
Issued by: NWS Philadelphia/Mount Holly

Counties Sussex County, NJ, Monroe County, PA

The radar

The Philadelphia radar (KDIX), 138 km from the middle of the area, began a volume at 21:26 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 16, 5:40 PM EDT	TSTM WND DMG	2 Wnw Vernon, NJ	MANY TREES REPORTED SNAPPED NEAR VERNON DUE TO WHAT WAS LIKELY A STRONG DOWNBURST. POWER OUTAGES ALSO REPORTED. TIME ESTIMATED FROM RADAR AND PUBLIC DAMAGE REPORT. THIS STORM EARLIER PRODUCED A 64 MPH WIND GUST.

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, 9.4 hours before the alert went out and 171 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.

864 
WWUS81 KPHI 162125
SPSPHI

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

NJZ001-007-PAZ055-062-162200-
Sussex-Warren-Monroe-Northampton-
525 PM EDT Fri Jul 16 2021

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT SUSSEX...NORTHERN
WARREN...EAST CENTRAL MONROE AND NORTHEASTERN NORTHAMPTON COUNTIES...

At 524 PM EDT, radar indicated strong thunderstorms were located 
along a line extending from Sussex to Central Monroe County. 
Movement was southeast at 15 mph.

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

Locations impacted include...
Newton, East Stroudsburg, Blairstown, Franklin, Hamburg, Ogdensburg,
Sussex, Branchville, Stormville, Henryville, Werry Lake, Millbrook,
Delaware Water Gap, Vernon Valley, Tannersville, Alpine Mountain,
Pellettown, Crandon Lakes, Hainesville and Flatbrookville.

This includes the following highways...
 Interstate 80 in Pennsylvania between mile markers 297 and 314.
 Interstate 80 in New Jersey between mile markers 0 and 6.
 Interstate 380 in Pennsylvania near mile marker 0.

These storms 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 4120 7436 4106 7454 4090 7516 4106 7544
      4115 7516 4114 7509 4108 7503 4116 7490
      4125 7485 4132 7464
TIME...MOT...LOC 2124Z 297DEG 14KT 4123 7462 4106 7528 

$$

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, 5:29 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, 6:46 PM EDT	Special Weather Statement	PHI	Warren	29 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 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.