Alert archive / New Jersey / Special Weather Statements in 2011

Special Weather Statement, NWS Philadelphia/Mount Holly

September 29, 20114 counties in New Jersey

NWS Philadelphia/Mount Holly issued this special weather statement at Sep 29, 2011, 2:39 PM EDT for 4 counties in New Jersey. It was in force for 66 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: Sep 29, 2011, 2:39 PM EDT (18:39 UTC)
Expired: Sep 29, 2011, 3:45 PM EDT
In force: 66 min
Issued by: NWS Philadelphia/Mount Holly

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

The radar

The Philadelphia radar (KDIX), 71 km from the middle of the area, began a volume at 18:39 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 12:00Z, 6.7 hours before the alert went out and 129 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: 614 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 445 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 138 m²/s²
0-3 km storm-relative helicity: 180 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 2.8

Open this sounding in Storm Lab

The text

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

856 
WWUS81 KPHI 291839
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
239 PM EDT THU SEP 29 2011

NJZ008-010-012-013-015-PAZ069-291945-
BUCKS PA-MERCER NJ-MIDDLESEX NJ-MORRIS NJ-SOMERSET NJ-
WESTERN MONMOUTH NJ-
239 PM EDT THU SEP 29 2011

...STRONG THUNDERSTORMS WILL AFFECT BUCKS...MERCER...MIDDLESEX...
MONMOUTH...MORRIS AND SOMERSET COUNTIES...

AT 235 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 6 MILES SOUTH OF
MORRISTOWN TO 12 MILES NORTH OF TRENTON TO 8 MILES NORTHEAST OF
PHILADELPHIA...MOVING NORTHEAST AT 20 MPH. THE THUNDERSTORMS WILL BE
NEAR MORRISTOWN...MILLINGTON AROUND 245 PM...HANOVER TOWNSHIP...ROCKY
HILL AROUND 300 PM...EAST HANOVER...MORRISVILLE AROUND 315 PM...
LINCOLN PARK...YARDVILLE-GROVEVILLE AROUND 330 PM...PRINCETON AND
KINGSTON AROUND 345 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 AND SMALL HAIL ARE POSSIBLE WITH THESE STORMS.

LAT...LON 4021 7411 4013 7495 4034 7476 4074 7455
      4096 7428 4089 7427 4089 7433 4086 7431
      4078 7437 4074 7436 4067 7445 4065 7445
      4066 7440 4059 7444 4059 7420 4047 7427
      4044 7420 4046 7412 4042 7406

$$

HAYES

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 28, 10:02 PM EDT	Coastal Flood Advisory	PHI	Burlington, Camden, Gloucester, Mercer, Salem	8 hr
Sep 29, 3:34 AM EDT	Coastal Flood Advisory	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 4 more	14 hr
Sep 29, 4:27 AM EDT	Special Weather Statement	PHI	Morris	63 min
Sep 29, 9:38 AM EDT	Special Marine Warning	PHI		67 min
Sep 29, 1:47 PM EDT	Special Weather Statement	PHI	Hunterdon, Morris, Sussex, Warren	58 min
Sep 29, 1:50 PM EDT	Special Weather Statement	PHI	Cape May, Cumberland	55 min
Sep 29, 1:56 PM EDT	Areal Flood Advisory	PHI	Sussex	2 hr
Sep 29, 2:25 PM EDT	Special Weather Statement	PHI	Burlington, Camden, Gloucester	65 min
Sep 29, 2:40 PM EDT	Special Marine Warning	PHI		95 min
Sep 29, 2:52 PM EDT	Special Weather Statement	PHI	Atlantic, Cape May	53 min
Sep 29, 3:27 PM EDT	Special Weather Statement	PHI	Burlington, Monmouth, Ocean	63 min
Sep 29, 4:08 PM EDT	Special Marine Warning	PHI		67 min
Sep 29, 5:37 PM EDT	Special Weather Statement	PHI	Sussex	53 min
Sep 28, 8:00 PM EDT	Special Weather Statement	PHI	Lehigh, Northampton	60 min
Sep 28, 8:32 PM EDT	Areal Flood Advisory	PHI	Carbon, Monroe	89 min
Sep 28, 8:38 PM EDT	Areal Flood Warning	PHI	Montgomery	8 hr
Sep 28, 8:53 PM EDT	Special Weather Statement	PHI	Monroe	67 min
Sep 28, 9:58 PM EDT	Areal Flood Warning	PHI	Carbon, Lehigh, Monroe, Northampton	12 hr
Sep 28, 11:07 PM EDT	Special Weather Statement	PHI	Chester	53 min
Sep 29, 12:41 AM EDT	Special Weather Statement	PHI	Carbon, Lehigh, Northampton	64 min
Sep 29, 9:54 AM EDT	Areal Flood Warning	PHI	Lehigh, Northampton	7 hr
Sep 29, 12:35 PM EDT	Special Weather Statement	PHI	Chester, Montgomery	55 min
Sep 29, 1:24 PM EDT	Special Weather Statement	PHI	Bucks, Delaware, Montgomery	66 min
Sep 29, 1:32 PM EDT	Areal Flood Advisory	PHI	Carbon, Monroe	103 min
Sep 29, 4:44 PM EDT	Areal Flood Warning	PHI	Lehigh, Northampton	3 hr
Sep 29, 3:34 AM EDT	Coastal Flood Statement	PHI	Caroline, Talbot	3 hr
Sep 29, 7:39 AM EDT	Special Weather Statement	PHI	Sussex	66 min
Sep 29, 1:16 PM EDT	Special Weather Statement	PHI	New Castle	59 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.