Alert archive / New Jersey / Special Weather Statements in 2017

Special Weather Statement, NWS Philadelphia/Mount Holly

October 24, 2017Mercer County, Middlesex County, Somerset County, New Jersey

NWS Philadelphia/Mount Holly issued this special weather statement at Oct 24, 2017, 11:11 AM EDT for Mercer County, Middlesex County, Somerset County, New Jersey. It was in force for 34 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 24, 2017, 11:11 AM EDT (15:11 UTC)
Expired
Oct 24, 2017, 11:45 AM EDT
In force
34 min
Issued by
NWS Philadelphia/Mount Holly

Counties Mercer County, NJ, Middlesex County, NJ, Somerset County, NJ

The radar

The Philadelphia radar (KDIX), 65 km from the middle of the area, began a volume at 15:11 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, 3.2 hours before the alert went out and 133 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-pSkew-T log-p diagram, Brookhaven, NY at 12:00Z on 2017-10-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 229 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 12:00Z on 2017-10-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 443 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
229 J/kg
Mixed-layer CIN
-36 J/kg
Mixed-layer LCL
611 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
443 m²/s²
0-3 km storm-relative helicity
413 m²/s²
Significant tornado parameter
0.4
Supercell composite
4.3

Open this sounding in Storm Lab

The text

As transmitted.

471 
WWUS81 KPHI 241511
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
1111 AM EDT TUE OCT 24 2017

NJZ008-010-012-013-015-019-PAZ106-241545-
Morris-Northwestern Burlington-Western
Monmouth-Somerset-Middlesex-Mercer-Lower Bucks-
1111 AM EDT TUE OCT 24 2017

...A SHOWER WILL AFFECT SOUTHEASTERN MORRIS...NORTHWESTERN 
BURLINGTON...WESTERN MONMOUTH...CENTRAL SOMERSET... 
MIDDLESEX...MERCER AND LOWER BUCKS COUNTIES...

At 1110 AM EDT, a shower was located over Mercerville-Hamilton
Square, or near Trenton, moving northeast at 55 mph.

Winds up to 40 mph are possible with this shower.

Locations impacted include...
Trenton, New Brunswick, Perth Amboy, Somerville, Somerset, Edison,
Old Bridge, East Brunswick, South Brunswick, Sayreville, North
Brunswick, Ewing, Carteret, Middlesex, Princeton, Bound Brook,
Manville, Jamesburg, Hightstown and Bordentown.

LAT...LON 4056 7421 4055 7425 4050 7426 4050 7428
      4047 7427 4000 7470 4020 7481 4072 7455
      4068 7445 4066 7445 4066 7440 4063 7442
      4060 7446 4061 7435 4059 7429 4060 7420
TIME...MOT...LOC 1510Z 205DEG 46KT 4023 7466 

$$

CMS

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 24, 2:42 AM EDTGale WarningPHI16 hr
Oct 24, 6:50 AM EDTSpecial Weather StatementPHICumberland40 min
Oct 24, 7:32 AM EDTSpecial Weather StatementPHIBurlington, Camden, Gloucester28 min
Oct 24, 8:00 AM EDTSpecial Weather StatementPHIHunterdon, Mercer, Middlesex, Somerset30 min
Oct 24, 8:33 AM EDTWind AdvisoryPHISussex2 hr
Oct 24, 8:58 AM EDTSpecial Weather StatementPHIWarren32 min
Oct 24, 9:27 AM EDTSpecial Weather StatementPHIWarren33 min
Oct 24, 9:59 AM EDTSpecial Weather StatementPHIGloucester31 min
Oct 24, 10:00 AM EDTSpecial Weather StatementPHISussex, Warren30 min
Oct 24, 10:30 AM EDTSpecial Weather StatementPHIBurlington, Camden, Hunterdon30 min
Oct 24, 10:51 AM EDTSpecial Weather StatementPHIHunterdon, Morris, Somerset, Sussex, Warren39 min
Oct 24, 11:03 AM EDTSpecial Weather StatementPHIAtlantic, Burlington27 min
Oct 24, 11:26 AM EDTSpecial Weather StatementPHIMorris, Somerset34 min
Oct 24, 11:31 AM EDTSpecial Weather StatementPHIAtlantic, Burlington, Ocean29 min
Oct 24, 12:03 PM EDTSpecial Weather StatementPHIMiddlesex, Morris, Sussex27 min
Oct 24, 12:28 PM EDTSpecial Weather StatementPHIMorris32 min
Oct 24, 1:04 PM EDTSpecial Weather StatementPHIMonmouth26 min
Oct 24, 2:16 PM EDTSmall Craft AdvisoryPHI13 hr
Oct 24, 5:08 PM EDTSpecial Marine WarningPHI67 min
Oct 24, 5:37 PM EDTSpecial Marine WarningPHI53 min
Oct 24, 5:41 PM EDTSpecial Weather StatementPHIAtlantic34 min
Oct 24, 5:53 PM EDTSpecial Marine WarningPHI67 min
Oct 24, 6:01 PM EDTAreal Flood AdvisoryPHIAtlantic, Burlington, Cape May, Ocean4 hr
Oct 24, 6:13 PM EDTSpecial Weather StatementPHIOcean32 min
Oct 24, 8:07 AM EDTSpecial Weather StatementPHIChester, Montgomery23 min
Oct 24, 8:28 AM EDTSpecial Weather StatementPHIBucks, Delaware, Lehigh, Montgomery, Northampton32 min
Oct 24, 8:52 AM EDTSpecial Weather StatementPHIMonroe23 min
Oct 24, 5:54 AM EDTCoastal Flood AdvisoryPHICecil, Kent, Queen Anne's, Talbot6 hr

Nearby

Special Weather Statements in New Jersey, 2017Every 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.