Alert archive / New Jersey / Special Weather Statements in 2011

Special Weather Statement, NWS Philadelphia/Mount Holly

May 28, 2011Mercer County, New Jersey

NWS Philadelphia/Mount Holly issued this special weather statement at May 28, 2011, 5:11 PM EDT for Mercer County, New Jersey. It was in force for 49 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: May 28, 2011, 5:11 PM EDT (21:11 UTC)
Expired: May 28, 2011, 6:00 PM EDT
In force: 49 min
Issued by: NWS Philadelphia/Mount Holly

County Mercer County, NJ

The radar

The Philadelphia radar (KDIX), 52 km from the middle of the area, began a volume at 21:14 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, 9.2 hours before the alert went out and 186 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: 977 J/kg
Mixed-layer CIN: -70 J/kg
Mixed-layer LCL: 696 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 60 m²/s²
0-3 km storm-relative helicity: 72 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 2.1

Open this sounding in Storm Lab

The text

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

129 
WWUS81 KPHI 282111
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
511 PM EDT SAT MAY 28 2011

NJZ009-010-015-019-PAZ068-069-071-282200-
BUCKS PA-HUNTERDON NJ-MERCER NJ-MONTGOMERY PA-
NORTHWESTERN BURLINGTON NJ-PHILADELPHIA PA-SOMERSET NJ-
511 PM EDT SAT MAY 28 2011

...STRONG THUNDERSTORMS WILL AFFECT BUCKS...BURLINGTON...HUNTERDON...
MERCER...MONTGOMERY...PHILADELPHIA AND SOMERSET COUNTIES...

AT 506 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
HEAVY SHOWERS AND A STRONG THUNDERSTORM ALONG A LINE EXTENDING FROM 
10 MILES EAST OF PHILADELPHIA TO 10 MILES SOUTH OF TRENTON...MOVING 
NORTH AT 25 MPH. THE HEAVY RAIN PRODUCING SHOWERS AND A 
THUNDERSTORM WILL BE NEAR 
BENSALEM...LEVITTOWN...TULLYTOWN...BORDENTOWN AROUND 520 
PM...PENNDEL...HULMEVILLE...FAIRLESS HILLS...WHITE HORSE AROUND 525 
PM...FEASTERVILLE AND MORRISVILLE AROUND 530 PM.

VERY HEAVY RAIN WILL FALL FROM THESE STORMS...AND WILL CAUSE WATER TO
POND ON ROADS.

WIND GUSTS TO 40 MPH ARE POSSIBLE WITH THESE STORMS.

LAT...LON 4040 7505 4051 7467 4007 7469 4000 7491
      4002 7503

$$

FORECASTER:DRAG

The office that day

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

Issued	Product	Office	Counties	Lasted
May 28, 5:51 PM EDT	Special Weather Statement	PHI	Somerset	39 min
May 28, 6:34 PM EDT	Special Weather Statement	PHI	Union	26 min
May 28, 6:58 PM EDT	Special Weather Statement	PHI	Morris	32 min
May 27, 9:58 PM EDT	Special Weather Statement	PHI	Berks	62 min
May 27, 11:06 PM EDT	Special Weather Statement	PHI	Carbon	54 min
May 27, 11:57 PM EDT	Special Weather Statement	PHI	Berks	63 min
May 28, 12:22 AM EDT	Special Weather Statement	PHI	Carbon	53 min
May 28, 12:36 AM EDT	Special Weather Statement	PHI	Carbon	54 min
May 28, 1:14 AM EDT	Special Weather Statement	PHI	Carbon, Monroe	61 min
May 27, 10:08 PM EDT	Special Weather Statement	PHI	Cecil	67 min
May 28, 2:06 PM EDT	Special Weather Statement	PHI	Sussex	54 min
May 28, 2:12 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Sussex	48 min
May 28, 2:51 PM EDT	Areal Flood Advisory	PHI	Kent, Sussex	99 min
May 28, 3:52 PM EDT	Special Weather Statement	PHI	Sussex	38 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.