Alert archive / New Jersey / Special Weather Statements in 2012

Special Weather Statement, NWS Philadelphia/Mount Holly

May 29, 20124 states

NWS Philadelphia/Mount Holly issued this special weather statement at May 29, 2012, 7:34 PM EDT for 4 states. It was in force for 56 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 29, 2012, 7:34 PM EDT (23:34 UTC)
Expired: May 29, 2012, 8:30 PM EDT
In force: 56 min
Issued by: NWS Philadelphia/Mount Holly

Counties New Castle County, DE, Cecil County, MD, Burlington County, NJ, Camden County, NJ, Gloucester County, NJ, Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Morris County, NJ, Somerset County, NJ, Delaware County, PA, Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 54 km from the middle of the area, began a volume at 23:37 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.

What was reported inside it

Time	Report	Where	Remark
May 29, 8:00 PM EDT	TSTM WND DMG	Bristol, PA	SOME WIRES ARE DOWN IN THE LOWER PART OF BUCKS COUNTY
May 29, 8:20 PM EDT	TSTM WND DMG	Robbinsville, NJ	TREES REPORTED DOWN IN ROBBINSVILLE.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 11.6 hours before the alert went out and 124 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: 667 J/kg
Mixed-layer CIN: -217 J/kg
Mixed-layer LCL: 1153 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: -39 m²/s²
0-3 km storm-relative helicity: -10 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.

087 
WWUS81 KPHI 292334
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
734 PM EDT TUE MAY 29 2012

DEZ001-MDZ008-NJZ008>010-012-015>019-PAZ070-071-300030-
CAMDEN NJ-CECIL MD-DELAWARE PA-GLOUCESTER NJ-HUNTERDON NJ-MERCER NJ-
MIDDLESEX NJ-MORRIS NJ-NEW CASTLE DE-NORTHWESTERN BURLINGTON NJ-
PHILADELPHIA PA-SALEM NJ-SOMERSET NJ-
734 PM EDT TUE MAY 29 2012

...STRONG THUNDERSTORMS WILL AFFECT BURLINGTON...CAMDEN...CECIL...
DELAWARE...GLOUCESTER...HUNTERDON...MERCER...MIDDLESEX...MORRIS...NEW
CASTLE...PHILADELPHIA...SALEM AND SOMERSET COUNTIES...

AT 729 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 10 MILES NORTH OF
MORRISTOWN TO 7 MILES WEST OF MORRISTOWN TO 19 MILES WEST OF
SOMERVILLE TO 3 MILES NORTH OF NEWARK...MOVING EAST AT 50 MPH. THE
THUNDERSTORMS WILL BE NEAR PEQUANNOCK TOWNSHIP...RIVERDALE AROUND 745
PM...WISSINOMING...TACONY AROUND 800 PM...WINDSOR...VOORHEES AROUND
815 PM...PEMBERTON HEIGHTS AND MCGUIRE AFB AROUND 830 PM.

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

WIND GUSTS TO 40 MPH ARE POSSIBLE WITH THESE STORMS. THEY MAY ARRIVE
BEFORE THE RAIN.

EXPECT LIGHTNING FROM THESE STORMS. DO NOT SEEK SHELTER UNDER
TREES WHEN LIGHTNING THREATENS...MOVE INDOORS WHEN A THUNDERSTORM
APPROACHES.

LAT...LON 4045 7422 4018 7462 3998 7450 3990 7458
      3976 7479 3949 7600 3954 7606 3954 7607
      3972 7623 3972 7578 4006 7538 3998 7527
      4009 7522 4013 7474 4044 7506 4100 7444
      4101 7430 4100 7429 4067 7445 4060 7420

$$

TFG

The office that day

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

Issued	Product	Office	Counties	Lasted
May 29, 3:27 AM EDT	Small Craft Advisory	PHI		21 hr
May 29, 6:22 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	53 min
May 29, 6:32 PM EDT	Severe Thunderstorm Warning	PHI	Morris, Sussex, Warren	66 min
May 29, 6:46 PM EDT	Special Weather Statement	PHI	Hunterdon, Mercer, Somerset	89 min
May 29, 6:51 PM EDT	Areal Flood Advisory	PHI	Sussex, Warren	114 min
May 29, 6:52 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Warren	53 min
May 29, 7:21 PM EDT	Areal Flood Warning	PHI	Sussex	2 hr
May 29, 12:29 PM EDT	Flash Flood Watch	PHI	Berks, Carbon, Delaware, Lehigh, Monroe, Northampton and 1 more	8 hr
May 29, 1:36 PM EDT	Special Weather Statement	PHI	Monroe	54 min
May 29, 1:50 PM EDT	Areal Flood Advisory	PHI	Carbon, Monroe	115 min
May 29, 5:06 PM EDT	Special Weather Statement	PHI	Berks, Carbon, Lehigh, Monroe, Northampton	114 min
May 29, 5:25 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Carbon, Lehigh	95 min
May 29, 5:45 PM EDT	Severe Thunderstorm Warning	PHI	Monroe, Northampton	75 min
May 29, 6:14 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Lehigh, Northampton	91 min
May 29, 6:23 PM EDT	Flash Flood Warning	PHI	Carbon, Monroe	112 min
May 29, 6:44 PM EDT	Areal Flood Advisory	PHI	Berks, Bucks, Lehigh, Montgomery	3 hr
May 29, 7:35 PM EDT	Areal Flood Advisory	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	115 min
May 29, 7:44 PM EDT	Special Weather Statement	PHI	Bucks	61 min

Nearby

Special Weather Statements in New Jersey, 2012 Special Weather Statements in Pennsylvania, 2012 Special Weather Statements in Delaware, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.