Alert archive / New Jersey / Special Weather Statements in 2013

Special Weather Statement, NWS Philadelphia/Mount Holly

October 7, 2013Mercer County, Middlesex County, New Jersey

NWS Philadelphia/Mount Holly issued this special weather statement at Oct 7, 2013, 2:33 PM EDT for Mercer County, Middlesex County, New Jersey. It was in force for 42 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: Oct 7, 2013, 2:33 PM EDT (18:33 UTC)
Expired: Oct 7, 2013, 3:15 PM EDT
In force: 42 min
Issued by: NWS Philadelphia/Mount Holly

Counties Mercer County, NJ, Middlesex County, NJ

The radar

The Philadelphia radar (KDIX), 44 km from the middle of the area, began a volume at 18:34 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

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 6.6 hours before the alert went out and 153 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: 114 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 584 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 149 m²/s²
0-3 km storm-relative helicity: 196 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

962 
WWUS81 KPHI 071833
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
233 PM EDT MON OCT 7 2013

NJZ010-012-015-018-019-PAZ071-106-071915-
CAMDEN NJ-LOWER BUCKS PA-MERCER NJ-MIDDLESEX NJ-
NORTHWESTERN BURLINGTON NJ-PHILADELPHIA PA-SOMERSET NJ-
233 PM EDT MON OCT 7 2013

...SHOWERS WITH STRONG WIND GUSTS WILL AFFECT MERCER...MIDDLESEX...
NORTHEASTERN PHILADELPHIA...NORTHWESTERN BURLINGTON...NORTHWESTERN
CAMDEN...SOUTHEASTERN BUCKS AND SOUTHERN SOMERSET COUNTIES...

AT 231 PM EDT...SHOWERS WITH STRONG WIND GUSTS WERE LOCATED FROM
WASHINGTON CROSSING TO PENNDEL TO NORTHEAST PHILADELPHIA TO
HADDONFIELD...MOVING NORTHEAST AT 55 MPH.

WIND GUSTS TO AROUND 50 MPH ARE POSSIBLE WITH THESE SHOWERS. 

AN ISOLATED THUNDERSTORM MAY DEVELOP IN THESE LINE SEGMENTS. 

BRIEF VERY HEAVY RAIN WILL FALL FROM SOME OF THESE SHOWERS...AND 
WILL CAUSE WATER TO POND ON ROADS AND FILL POOR DRAINAGE AREAS. THE 
RAIN CAN CAUSE RAPID RISES ON SMALL STREAMS AND CREEKS. 

THESE SHOWERS WILL BE NEAR HULMEVILLE...CROYDON...EWING...AND
EDGEWATER PARK AROUND 240 PM...LAWRENCEVILLE...LEVITTOWN...FAIRLESS
HILLS...AND WILLINGBORO AROUND 245 PM...MORRISVILLE AND TULLYTOWN
AROUND 250 PM.

LAT...LON 4054 7433 4031 7437 4028 7439 4025 7448
      4019 7457 4019 7461 4016 7460 3986 7510
      4001 7509 4014 7501 4029 7500 4034 7490
      4035 7486 4037 7486 4060 7444 4060 7428

$$

FORECASTER:  DRAG

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 7, 1:30 PM EDT	Special Weather Statement	PHI	Hunterdon, Morris, Sussex, Warren	60 min
Oct 7, 1:37 PM EDT	Special Weather Statement	PHI	Salem	53 min
Oct 7, 1:59 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon	46 min
Oct 7, 2:24 PM EDT	Special Weather Statement	PHI	Morris, Somerset	51 min
Oct 7, 3:02 PM EDT	Special Weather Statement	PHI	Mercer, Middlesex	43 min
Oct 7, 3:49 PM EDT	Special Marine Warning	PHI		56 min
Oct 7, 4:05 PM EDT	Special Weather Statement	PHI	Monmouth, Ocean	40 min
Oct 7, 11:31 AM EDT	Special Weather Statement	PHI	Berks, Chester	59 min
Oct 7, 11:50 AM EDT	Severe Thunderstorm Warning	PHI	Berks	40 min
Oct 7, 12:12 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Carbon, Lehigh, Monroe, Northampton	63 min
Oct 7, 12:41 PM EDT	Special Weather Statement	PHI	Chester	64 min
Oct 7, 12:49 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Montgomery	41 min
Oct 7, 1:05 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware	25 min
Oct 7, 1:33 PM EDT	Special Weather Statement	PHI	Bucks, Montgomery	42 min
Oct 7, 2:18 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Sussex	57 min
Oct 7, 3:21 PM EDT	Special Weather Statement	PHI	Sussex	39 min

Nearby

Special Weather Statements in New Jersey, 2013 Every special weather statement in 2013

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.