Alert archive / New Jersey / Special Weather Statements in 2018

Special Weather Statement, NWS Philadelphia/Mount Holly

August 2, 2018Somerset County, New Jersey

NWS Philadelphia/Mount Holly issued this special weather statement at Aug 2, 2018, 9:35 PM EDT for Somerset County, New Jersey. It was in force for 25 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
Aug 2, 2018, 9:35 PM EDT (01:35 UTC)
Expired
Aug 2, 2018, 10:00 PM EDT
In force
25 min
Issued by
NWS Philadelphia/Mount Holly

County Somerset County, NJ

The radar

The Philadelphia radar (KDIX), 72 km from the middle of the area, began a volume at 01:34 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

Brookhaven, NY (KOKX), launched 00:00Z, 1.6 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 00:00Z on 2018-08-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1316 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 00:00Z on 2018-08-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 103 square meters per square second.193958Sfc1 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
1316 J/kg
Mixed-layer CIN
-35 J/kg
Mixed-layer LCL
752 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
103 m²/s²
0-3 km storm-relative helicity
98 m²/s²
Significant tornado parameter
0.5
Supercell composite
3.1

Open this sounding in Storm Lab

The text

As transmitted.

127 
WWUS81 KPHI 030135
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
935 PM EDT THU AUG 2 2018

NJZ008-010-012-030200-
Morris-Somerset-Middlesex-
935 PM EDT THU AUG 2 2018

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT SOUTHEASTERN MORRIS... 
SOMERSET AND NORTHEASTERN MIDDLESEX COUNTIES...

At 933 PM EDT, radar indicated strong thunderstorms, located along a 
line, extending from near Colonia to Belle Mead. Movement was 
northeast at 20 mph.

Winds up to 40 mph are possible with these storms.

Locations impacted include...
New Brunswick, Perth Amboy, Somerville, Somerset, Edison,
Bridgewater, Carteret, Madison, Middlesex, Bound Brook, Manville,
Chatham, Far Hills, Millstone, Skillman, Flagtown, Colonia, Belle
Mead, Martinsville and Millington.

Heavy rainfall is also occurring with these storms, and may cause 
localized flooding. Do not drive your vehicle through flooded 
roadways.

LAT...LON 4056 7421 4055 7425 4052 7425 4040 7474
      4045 7477 4068 7468 4076 7436 4067 7446
      4066 7445 4066 7441 4065 7440 4060 7446
      4061 7431 4059 7428 4060 7421
TIME...MOT...LOC 0133Z 206DEG 18KT 4056 7431 4048 7467 

$$

Kruzdlo

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 2, 10:05 PM EDTSpecial Weather StatementPHIMorris, Somerset55 min
Aug 3, 11:47 AM EDTSpecial Marine WarningPHI88 min
Aug 3, 12:17 PM EDTSpecial Weather StatementPHICape May43 min
Aug 3, 12:37 PM EDTSpecial Weather StatementPHICamden, Gloucester38 min
Aug 3, 12:52 PM EDTSevere Thunderstorm WarningPHIAtlantic, Cape May, Cumberland21 min
Aug 3, 1:01 PM EDTSpecial Weather StatementPHIHunterdon44 min
Aug 3, 1:14 PM EDTSpecial Weather StatementPHIMercer46 min
Aug 3, 1:27 PM EDTSevere Thunderstorm WarningPHIHunterdon, Mercer, Middlesex, Somerset48 min
Aug 3, 1:42 PM EDTSpecial Weather StatementPHIHunterdon, Morris, Sussex, Warren63 min
Aug 3, 2:00 PM EDTSevere Thunderstorm WarningPHIMiddlesex, Somerset30 min
Aug 3, 2:37 PM EDTSpecial Weather StatementPHIMorris, Sussex38 min
Aug 3, 2:54 PM EDTSpecial Marine WarningPHI20 min
Aug 3, 3:33 PM EDTSpecial Weather StatementPHICamden, Gloucester, Salem57 min
Aug 3, 4:31 PM EDTSpecial Weather StatementPHISalem59 min
Aug 3, 4:45 PM EDTSpecial Weather StatementPHIWarren60 min
Aug 3, 5:25 PM EDTSpecial Weather StatementPHIMonmouth, Ocean50 min
Aug 3, 5:27 PM EDTSpecial Weather StatementPHIBurlington, Camden, Gloucester63 min
Aug 3, 6:52 PM EDTSpecial Weather StatementPHISussex, Warren113 min
Aug 3, 7:56 PM EDTAreal Flood AdvisoryPHISussex, Warren4 hr
Aug 3, 3:42 PM EDTSpecial Weather StatementPHILehigh, Northampton63 min
Aug 3, 5:45 PM EDTSpecial Weather StatementPHIDelaware, Montgomery, Philadelphia60 min
Aug 3, 7:37 PM EDTAreal Flood AdvisoryPHIBerks, Lehigh4 hr
Aug 3, 3:29 PM EDTSpecial Weather StatementPHISussex46 min

Nearby

Special Weather Statements in New Jersey, 2018Every special weather statement in 2018

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.