Alert archive / New Jersey / Special Weather Statements in 2011

Special Weather Statement, NWS Philadelphia/Mount Holly

June 17, 2011Mercer County, Middlesex County, Somerset County, New Jersey

NWS Philadelphia/Mount Holly issued this special weather statement at Jun 17, 2011, 4:39 AM EDT for Mercer County, Middlesex County, Somerset County, New Jersey. It was in force for 51 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: Jun 17, 2011, 4:39 AM EDT (08:39 UTC)
Expired: Jun 17, 2011, 5:30 AM EDT
In force: 51 min
Issued by: NWS Philadelphia/Mount Holly

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

The radar

The Philadelphia radar (KDIX), 64 km from the middle of the area, began a volume at 08:39 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, 8.7 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-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: 2259 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 6 m²/s²
0-3 km storm-relative helicity: 11 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.

479 
WWUS81 KPHI 170839
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
439 AM EDT FRI JUN 17 2011

NJZ009-010-012-015-170930-
HUNTERDON NJ-MERCER NJ-MIDDLESEX NJ-SOMERSET NJ-
439 AM EDT FRI JUN 17 2011

...A CLUSTER OF STRONG THUNDERSTORMS WILL AFFECT 
HUNTERDON...MERCER...MIDDLESEX AND SOMERSET COUNTIES...

AT 437 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
CLUSTER OF STRONG THUNDERSTORMS FROM LOWER BUCKS COUNTY TO MERCER 
COUNTY. THESE ARE MOVING TO THE NORTHEAST AT 30 MPH.

VERY HEAVY RAIN WILL FALL FROM THESE STORMS...AND WILL CAUSE WATER TO
POND ON ROADS AND QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS.

THESE STORMS HAVE A HISTORY OF PRODUCING FREQUENT CLOUD TO GROUND 
LIGHTNING. DO NOT SEEK SHELTER UNDER TREES WHEN LIGHTNING 
THREATENS...MOVE INDOORS WHEN A THUNDERSTORM APPROACHES.

LAT...LON 4051 7424 4050 7426 4047 7427 4046 7425
      4016 7463 4032 7485 4064 7456 4062 7442
      4061 7442 4059 7444 4060 7431 4059 7429
      4060 7425 4059 7419

$$

FORECASTER: GORSE

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 16, 9:32 PM EDT	Coastal Flood Advisory	PHI	Salem	4 hr
Jun 17, 2:00 AM EDT	Special Weather Statement	PHI	Cape May	60 min
Jun 17, 1:30 PM EDT	Special Weather Statement	PHI	Sussex, Warren	60 min
Jun 17, 1:45 PM EDT	Special Weather Statement	PHI	Morris	45 min
Jun 17, 1:48 PM EDT	Severe Thunderstorm Warning	PHI	Sussex, Warren	57 min
Jun 17, 3:31 PM EDT	Special Weather Statement	PHI	Middlesex	59 min
Jun 17, 3:45 PM EDT	Special Weather Statement	PHI	Cumberland, Gloucester, Salem	60 min
Jun 17, 4:48 PM EDT	Special Weather Statement	PHI	Monmouth	57 min
Jun 17, 7:35 PM EDT	Special Marine Warning	PHI		25 min
Jun 17, 4:05 AM EDT	Special Weather Statement	PHI	Philadelphia	55 min
Jun 17, 3:10 AM EDT	Coastal Flood Advisory	PHI	Caroline, Cecil, Kent, Queen Anne's, Talbot	9 hr
Jun 17, 2:34 PM EDT	Special Weather Statement	PHI	Cecil	56 min
Jun 17, 7:02 PM EDT	Special Weather Statement	PHI	Caroline, Talbot	58 min
Jun 17, 7:23 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Queen Anne's, Talbot	52 min
Jun 16, 11:45 PM EDT	Special Weather Statement	PHI	Sussex	60 min
Jun 17, 12:51 AM EDT	Special Weather Statement	PHI	Sussex	54 min

Nearby

Special Weather Statements in New Jersey, 2011 Every special weather statement in 2011

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.