Alert archive / New Jersey / Special Weather Statements in 2013

Special Weather Statement, NWS Philadelphia/Mount Holly

April 19, 20137 counties in New Jersey

NWS Philadelphia/Mount Holly issued this special weather statement at Apr 19, 2013, 8:23 PM EDT for 7 counties in New Jersey. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Apr 19, 2013, 8:23 PM EDT (00:23 UTC)
Expired: Apr 19, 2013, 11:15 PM EDT
In force: 3 hr
Issued by: NWS Philadelphia/Mount Holly

Counties Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Morris County, NJ, Somerset County, NJ, Sussex County, NJ, Warren County, NJ

The radar

The Philadelphia radar (KDIX), 96 km from the middle of the area, began a volume at 00:25 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, 0.4 hours before the alert went out and 155 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 529 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 388 m²/s²
0-3 km storm-relative helicity: 363 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

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

762 
WWUS81 KPHI 200023
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
823 PM EDT FRI APR 19 2013

NJZ001-007>010-012-015-200315-
HUNTERDON NJ-MERCER NJ-MIDDLESEX NJ-MORRIS NJ-SOMERSET NJ-SUSSEX NJ-
WARREN NJ-
823 PM EDT FRI APR 19 2013

...STRONG THUNDERSTORMS HEADING TOWARD NORTHERN NEW JERSEY...

AT 815 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE 
OF STRONG TO POSSIBLY SEVERE THUNDERSTORMS IN EASTERN PENNSYLVANIA.
THIS LINE WAS MOVING EAST AT APPROXIMATELY 35 MPH...AND WILL ENTER 
NORTHWESTERN NEW JERSEY BETWEEN 830 AND 930 PM. 

WIND GUSTS UP TO 50 MPH ARE POSSIBLE WITH THESE THUNDERSTORMS. BRIEF 
HEAVY DOWNPOURS AND CLOUD TO GROUND LIGHTNING CAN ALSO BE EXPECTED. 
WARNINGS MAY BE NECESSARY IF THESE THUNDERSTORMS INCREASE IN 
STRENGTH.

LAT...LON 4121 7437 4105 7449 4097 7427 4060 7444
      4058 7420 4049 7426 4045 7422 4028 7440
      4017 7473 4040 7498 4042 7506 4054 7507
      4058 7514 4079 7512 4086 7505 4101 7510
      4109 7496 4109 7499 4132 7480 4136 7469

$$

JJM

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 19, 8:20 PM EDT	Special Marine Warning	PHI		85 min
Apr 19, 8:48 PM EDT	Special Weather Statement	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 3 more	3 hr
Apr 19, 10:25 PM EDT	Special Marine Warning	PHI		110 min
Apr 20, 12:20 AM EDT	Small Craft Advisory	PHI		30 hr
Apr 20, 6:09 PM EDT	Frost Advisory	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 5 more	12 hr
Apr 19, 8:08 PM EDT	Severe Thunderstorm Warning	PHI	Cecil	52 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.