Alert archive / New Jersey / Special Weather Statements in 2017

Special Weather Statement, NWS Philadelphia/Mount Holly

June 23, 2017Mercer County, New Jersey

NWS Philadelphia/Mount Holly issued this special weather statement at Jun 23, 2017, 7:13 PM EDT for Mercer County, New Jersey. It was in force for 47 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: Jun 23, 2017, 7:13 PM EDT (23:13 UTC)
Expired: Jun 23, 2017, 8:00 PM EDT
In force: 47 min
Issued by: NWS Philadelphia/Mount Holly

County Mercer County, NJ

The radar

The Philadelphia radar (KDIX), 39 km from the middle of the area, began a volume at 23:13 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, 11.2 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: 688 J/kg
Mixed-layer CIN: -89 J/kg
Mixed-layer LCL: 1159 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 83 m²/s²
0-3 km storm-relative helicity: 100 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

As transmitted.

836 
WWUS81 KPHI 232313
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
713 PM EDT FRI JUN 23 2017

NJZ009-010-012-015-PAZ105-106-240000-
Hunterdon-Somerset-Middlesex-Mercer-Lower Bucks-Upper Bucks-
713 PM EDT FRI JUN 23 2017

...A STRONG THUNDERSTORM WILL AFFECT SOUTHEASTERN HUNTERDON...
MERCER...NORTHERN BURLINGTON...SOUTH CENTRAL SOMERSET...WESTERN
MONMOUTH...SOUTHWESTERN MIDDLESEX AND EAST CENTRAL BUCKS COUNTIES...

At 713 PM EDT, a strong thunderstorm was located near New Hope, or 13
miles northwest of Trenton, moving east at 35 mph.

Winds up to 50 mph are possible with this storm.

Locations impacted include...
Trenton, South Brunswick, Ewing, Princeton, Hightstown, Pennington,
New Hope, Yardley, Newtown, Hopewell, Allentown, Rocky Hill,
Stockton, Washington Crossing, Skillman, Princeton Meadows, Windsor,
Kingston, Plainsboro Center and Lumberville.

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 4021 7455 4018 7457 4018 7461 4016 7460
      4017 7468 4019 7470 4017 7471 4022 7508
      4041 7508 4043 7454 4022 7453
TIME...MOT...LOC 2313Z 273DEG 32KT 4030 7499 

$$

Meola

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 23, 9:20 AM EDT	Special Marine Warning	PHI		55 min
Jun 23, 6:58 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Morris, Somerset, Warren	4 hr
Jun 23, 7:06 PM EDT	Special Weather Statement	PHI	Hunterdon, Morris, Somerset	24 min
Jun 23, 7:30 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Mercer, Middlesex, Somerset	4 hr
Jun 23, 4:53 PM EDT	Special Weather Statement	PHI	Berks	52 min
Jun 23, 5:15 PM EDT	Areal Flood Advisory	PHI	Berks, Carbon, Lehigh, Northampton	4 hr
Jun 23, 5:21 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Lehigh, Montgomery	54 min
Jun 23, 5:33 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Chester, Montgomery	57 min
Jun 23, 6:10 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Lehigh, Montgomery	50 min
Jun 23, 6:57 PM EDT	Special Weather Statement	PHI	Bucks	33 min
Jun 23, 7:46 PM EDT	Special Weather Statement	PHI	Berks, Carbon, Lehigh, Northampton	59 min

Nearby

Special Weather Statements in New Jersey, 2017 Every special weather statement in 2017

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.