Alert archive / New Jersey / Special Weather Statements in 2012

Special Weather Statement, NWS Philadelphia/Mount Holly

August 4, 2012Middlesex County, Somerset County, New Jersey

NWS Philadelphia/Mount Holly issued this special weather statement at Aug 4, 2012, 3:42 PM EDT for Middlesex County, Somerset County, New Jersey. It was in force for 63 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 4, 2012, 3:42 PM EDT (19:42 UTC)
Expired: Aug 4, 2012, 4:45 PM EDT
In force: 63 min
Issued by: NWS Philadelphia/Mount Holly

Counties Middlesex County, NJ, Somerset County, NJ

The radar

The Philadelphia radar (KDIX), 69 km from the middle of the area, began a volume at 19:45 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, 7.7 hours before the alert went out and 146 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: 2028 J/kg
Mixed-layer CIN: -52 J/kg
Mixed-layer LCL: 802 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 9 m²/s²
0-3 km storm-relative helicity: 22 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.

398 
WWUS81 KPHI 041942
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
342 PM EDT SAT AUG 4 2012

NJZ008-010-012-042045-
MIDDLESEX NJ-MORRIS NJ-SOMERSET NJ-
342 PM EDT SAT AUG 4 2012

...A STRONG THUNDERSTORM WILL AFFECT MIDDLESEX...MORRIS AND SOMERSET
COUNTIES...

AT 340 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 9 MILES SOUTHWEST OF NEW BRUNSWICK...MOVING NORTH
AT 20 MPH. THE THUNDERSTORM WILL BE NEAR SOMERSET...NORTH BRUNSWICK
AROUND 400 PM...SOUTH BOUND BROOK...BOUND BROOK AROUND 415 PM...
MILLINGTON...BASKING RIDGE AROUND 430 PM...BERNARDSVILLE AND CHATHAM
AROUND 445 PM.

VERY HEAVY RAIN WILL FALL FROM THIS STORM...AND WILL CAUSE WATER TO
POND ON ROADS AND QUICKLY FILL POOR DRAINAGE AREAS.

WIND GUSTS TO 40 MPH AND SMALL HAIL ARE POSSIBLE WITH THIS STORM.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. DO
NOT SEEK SHELTER UNDER TREES WHEN LIGHTNING THREATENS...MOVE INDOORS
WHEN A THUNDERSTORM APPROACHES.

LAT...LON 4034 7439 4034 7463 4039 7462 4038 7469
      4061 7472 4062 7471 4067 7473 4070 7471
      4074 7474 4074 7437 4067 7445 4067 7439
      4060 7444 4061 7432

$$

FORECASTER: HEAVENER

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 4, 1:26 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden	34 min
Aug 4, 2:13 PM EDT	Severe Thunderstorm Warning	PHI	Salem	62 min
Aug 4, 2:28 PM EDT	Special Marine Warning	PHI		62 min
Aug 4, 2:53 PM EDT	Special Weather Statement	PHI	Mercer	67 min
Aug 4, 3:21 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Warren	54 min
Aug 4, 3:35 PM EDT	Special Marine Warning	PHI		38 min
Aug 4, 3:47 PM EDT	Small Craft Advisory	PHI		39 hr
Aug 4, 4:01 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex, Morris, Somerset	59 min
Aug 4, 5:30 PM EDT	Small Craft Advisory	PHI		4 hr
Aug 4, 1:12 PM EDT	Special Weather Statement	PHI	Philadelphia	63 min
Aug 4, 1:46 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery	44 min
Aug 4, 2:51 PM EDT	Special Weather Statement	PHI	Northampton	54 min
Aug 4, 3:55 PM EDT	Special Weather Statement	PHI	Lebanon	65 min
Aug 4, 4:08 PM EDT	Special Weather Statement	PHI	Carbon, Monroe	52 min
Aug 4, 4:49 PM EDT	Special Weather Statement	PHI	Carbon, Monroe	56 min
Aug 4, 1:18 PM EDT	Special Weather Statement	PHI	New Castle	57 min
Aug 4, 2:43 PM EDT	Areal Flood Advisory	PHI	New Castle	105 min
Aug 4, 3:31 PM EDT	Flash Flood Warning	PHI	New Castle	57 min
Aug 4, 3:31 PM EDT	Severe Thunderstorm Warning	PHI	Kent, New Castle	28 min
Aug 4, 5:07 PM EDT	Special Weather Statement	PHI	Kent	53 min

Nearby

Special Weather Statements in New Jersey, 2012 Every special weather statement in 2012

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.