Alert archive / New Jersey / Special Weather Statements in 2021

Special Weather Statement, NWS Philadelphia/Mount Holly

March 6, 2021Middlesex County, Somerset County, New Jersey

NWS Philadelphia/Mount Holly issued this special weather statement at Mar 6, 2021, 6:50 AM EST for Middlesex County, Somerset County, New Jersey. It was in force for 40 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
Mar 6, 2021, 6:50 AM EST (11:50 UTC)
Expired
Mar 6, 2021, 7:30 AM EST
In force
40 min
Issued by
NWS Philadelphia/Mount Holly

Counties Middlesex County, NJ, Somerset County, NJ

The radar

The Philadelphia radar (KDIX), 65 km from the middle of the area, began a volume at 11:51 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, 11.8 hours before the alert went out and 138 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 2021-03-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 00:00Z on 2021-03-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -100 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2512 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
-100 m²/s²
0-3 km storm-relative helicity
19 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

124 
WWUS81 KPHI 061150
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
650 AM EST Sat Mar 6 2021

NJZ008>010-012-015-061230-
Morris-Hunterdon-Somerset-Middlesex-Mercer-
650 AM EST Sat Mar 6 2021

...A SNOW SQUALL WILL AFFECT SOUTHWESTERN MORRIS...NORTHEASTERN
HUNTERDON...NORTHEASTERN MERCER...SOMERSET AND MIDDLESEX COUNTIES...

At 650 AM EST, a snow squall was located over Bridgewater, or near
Somerville, moving southeast at 30 mph.

Locations impacted include...
New Brunswick, Perth Amboy, Somerville, Somerset, Edison, Old Bridge,
East Brunswick, Bridgewater, South Brunswick, Sayreville, North
Brunswick, Middlesex, Bound Brook, Manville, Jamesburg, Hightstown,
Cranbury, High Bridge, Clinton and Peapack And Gladstone.

This includes the following highways...
 New Jersey Turnpike between exits 9 and 12.
 Interstate 78 in New Jersey between mile markers 17 and 40.
 Interstate 287 in New Jersey between mile markers 0 and 28.
 Garden State Parkway between mile markers 123 and 132.

Use extra caution if you must travel into or through this dangerous
snow squall. Rapid changes in visibility and potentially slick roads 
can lead to accidents. Consider delaying travel until the squall 
passes your location.

LAT...LON 4027 7454 4067 7495 4081 7475 4063 7442
      4062 7443 4060 7446 4060 7437 4053 7425
      4050 7426 4050 7428 4047 7427 4046 7425
TIME...MOT...LOC 1150Z 324DEG 26KT 4063 7462 

$$

SFJ

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 6, 6:48 AM ESTSpecial Weather StatementPHILehigh42 min

Nearby

Special Weather Statements in New Jersey, 2021Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.