Alert archive / New Jersey / Special Weather Statements in 2012

Special Weather Statement, NWS Philadelphia/Mount Holly

August 15, 2012Mercer County, New Jersey

NWS Philadelphia/Mount Holly issued this special weather statement at Aug 15, 2012, 5:58 PM EDT for Mercer County, New Jersey. It was in force for 62 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 15, 2012, 5:58 PM EDT (21:58 UTC)
Expired: Aug 15, 2012, 7:00 PM EDT
In force: 62 min
Issued by: NWS Philadelphia/Mount Holly

County Mercer County, NJ

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 10.0 hours before the alert went out and 148 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: 426 J/kg
Mixed-layer CIN: -96 J/kg
Mixed-layer LCL: 828 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: -3 m²/s²
0-3 km storm-relative helicity: 60 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

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

338 
WWUS81 KPHI 152158
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
558 PM EDT WED AUG 15 2012

NJZ010-012-015-PAZ069-152300-
BUCKS PA-MERCER NJ-MIDDLESEX NJ-SOMERSET NJ-
558 PM EDT WED AUG 15 2012

...A STRONG THUNDERSTORM WILL AFFECT BUCKS...MERCER...MIDDLESEX AND
SOMERSET COUNTIES...

AT 556 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 10 MILES WEST OF TRENTON...MOVING NORTHEAST AT 15
MPH. THE THUNDERSTORM WILL BE NEAR FAIRLESS HILLS AROUND 605 PM...
WOODSIDE AROUND 610 PM...YARDLEY AROUND 615 PM...MORRISVILLE AROUND
620 PM...EWING...TRENTON AROUND 625 PM AND PENNINGTON AROUND 630 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 30 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 4027 7445 4015 7496 4030 7507 4036 7495
      4034 7494 4034 7486 4037 7487 4038 7486
      4038 7482 4042 7480 4042 7475 4045 7476
      4049 7466

$$

FORECASTER: HEAVENER

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 15, 1:57 AM EDT	Special Weather Statement	PHI	Hunterdon, Somerset	63 min
Aug 15, 2:00 AM EDT	Special Weather Statement	PHI	Warren	90 min
Aug 15, 2:13 AM EDT	Special Weather Statement	PHI	Sussex	62 min
Aug 15, 3:10 AM EDT	Areal Flood Advisory	PHI	Sussex	111 min
Aug 15, 3:22 AM EDT	Special Weather Statement	PHI	Sussex	53 min
Aug 15, 2:38 PM EDT	Special Weather Statement	PHI	Monmouth	52 min
Aug 15, 2:53 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth	52 min
Aug 15, 2:58 PM EDT	Special Weather Statement	PHI	Atlantic	62 min
Aug 15, 3:17 PM EDT	Special Marine Warning	PHI		43 min
Aug 15, 3:23 PM EDT	Special Weather Statement	PHI	Sussex	52 min
Aug 15, 3:25 PM EDT	Severe Thunderstorm Warning	PHI	Morris, Sussex	65 min
Aug 15, 4:14 PM EDT	Areal Flood Warning	PHI	Monmouth	3 hr
Aug 15, 4:24 PM EDT	Special Weather Statement	PHI	Atlantic	66 min
Aug 15, 4:33 PM EDT	Special Weather Statement	PHI	Morris, Sussex, Warren	87 min
Aug 15, 4:45 PM EDT	Special Weather Statement	PHI	Ocean	90 min
Aug 15, 5:22 PM EDT	Severe Thunderstorm Warning	PHI	Mercer, Middlesex, Monmouth	38 min
Aug 15, 5:28 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Ocean	34 min
Aug 15, 5:48 PM EDT	Special Weather Statement	PHI	Middlesex	57 min
Aug 15, 6:06 PM EDT	Special Weather Statement	PHI	Monmouth	84 min
Aug 15, 6:19 PM EDT	Areal Flood Warning	PHI	Mercer, Middlesex, Monmouth, Ocean	118 min
Aug 15, 6:50 PM EDT	Areal Flood Warning	PHI	Morris	87 min
Aug 15, 6:58 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cumberland, Gloucester	62 min
Aug 14, 11:10 PM EDT	Special Weather Statement	PHI	Berks	80 min
Aug 14, 11:40 PM EDT	Special Weather Statement	PHI	Berks, Chester	95 min
Aug 15, 12:28 AM EDT	Special Weather Statement	PHI	Berks, Lehigh, Montgomery	92 min
Aug 15, 12:49 AM EDT	Areal Flood Advisory	PHI	Berks, Chester, Lehigh, Montgomery	3 hr
Aug 15, 1:26 AM EDT	Special Weather Statement	PHI	Bucks, Montgomery	94 min
Aug 15, 1:28 AM EDT	Special Weather Statement	PHI	Carbon, Monroe	62 min
Aug 15, 1:48 AM EDT	Areal Flood Advisory	PHI	Bucks, Montgomery	85 min
Aug 14, 10:37 PM EDT	Special Weather Statement	PHI	Kent	53 min
Aug 15, 6:55 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Talbot	49 min
Aug 15, 7:16 PM EDT	Severe Thunderstorm Warning	PHI	Queen Anne's, Talbot	35 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.