Alert archive / New Jersey / Special Marine Warnings in 2012

Special Marine Warning 101, NWS Philadelphia/Mount Holly

August 9, 2012

NWS Philadelphia/Mount Holly issued this special marine warning at Aug 9, 2012, 1:46 PM EDT. It was in force for 54 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 9, 2012, 1:46 PM EDT (17:46 UTC)
Expired: Aug 9, 2012, 2:40 PM EDT
In force: 54 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

The radar

The Dover AFB radar (KDOX), 50 km from the middle of the area, began a volume at 17:48 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

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 5.8 hours before the alert went out and 80 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: 1906 J/kg
Mixed-layer CIN: -18 J/kg
Mixed-layer LCL: 754 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 46 m²/s²
0-3 km storm-relative helicity: 37 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.

239 
WHUS51 KPHI 091746
SMWPHI
ANZ430-431-091915-
/O.NEW.KPHI.MA.W.0101.120809T1746Z-120809T1915Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SPECIAL MARINE WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
146 PM EDT THU AUG 9 2012

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SPECIAL MARINE WARNING FOR...
  THE DELAWARE BAY...


  INCLUDING CROSS LEDGE LIGHT...EAST POINT...FORTESQUE BEACH...
  FOURTEEN FOOT BANK LIGHT...MIAH MAULL LIGHT AND SEA BREEZE...

* UNTIL 315 PM EDT

* AT 140 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  THUNDERSTORM...PRODUCING STRONG WINDS 34 KNOTS OR GREATER 10 NM
  SOUTHWEST OF CROSS LEDGE LIGHT...OR ABOUT OVER BOWERS BEACH...
  MOVING NORTHEAST AT 10 KNOTS.

* THIS STRONG THUNDERSTORM WILL BE NEAR
  OVER CROSS LEDGE LIGHT BY 235 PM EDT
  6 NM NORTHWEST OF MIAH MAULL LIGHT BY 240 PM EDT
  7 NM SOUTHEAST OF SEA BREEZE BY 250 PM EDT
  OVER FORTESQUE BEACH BY 305 PM EDT
  7 NM NORTHWEST OF EAST POINT BY 315 PM EDT

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MARINERS CAN EXPECT GUSTY WINDS...HIGH WAVES...DANGEROUS LIGHTNING...
AND HEAVY RAINS. BOATERS SHOULD SEEK SAFE HARBOR IMMEDIATELY...UNTIL
THIS STORM PASSES.

FREQUENT LIGHTNING IS OCCURRING WITH THIS STORM. IF CAUGHT ON THE
OPEN WATER STAY BELOW DECK IF POSSIBLE...KEEP AWAY FROM UNGROUNDED
METAL OBJECTS.

&&

LAT...LON 3933 7532 3929 7529 3935 7529 3940 7522
      3932 7528 3932 7523 3929 7523 3930 7517
      3927 7524 3924 7517 3919 7514 3923 7512
      3922 7505 3927 7501 3920 7503 3916 7488
      3898 7532 3904 7541 3919 7540 3924 7547
TIME...MOT...LOC 1741Z 238DEG 11KT 3911 7547

$$
 
TFG

1 follow-up statement

958 
FZUS71 KPHI 091840
MWSPHI

MARINE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
240 PM EDT THU AUG 9 2012

ANZ430-431-091849-
/O.CAN.KPHI.MA.W.0101.000000T0000Z-120809T1915Z/
240 PM EDT THU AUG 9 2012

...SPECIAL MARINE WARNING CANCELLED...


THE AFFECTED AREAS WERE...
DELAWARE BAY WATERS NORTH OF EAST POINT NJ TO SLAUGHTER BEACH DE OVER
ATLANTIC COASTAL WATERS...
DELAWARE BAY WATERS SOUTH OF EAST POINT NJ TO SLAUGHTER BEACH DE OVER
ATLANTIC COASTAL WATERS...
INCLUDING CROSS LEDGE LIGHT...EAST POINT...FORTESQUE BEACH...FOURTEEN
FOOT BANK LIGHT...MIAH MAULL LIGHT AND SEA BREEZE...

THE GUST FRONTS FROM THE THUNDERSTORMS OVER DELAWARE HAVE WEAKENED.
PLEASE NOTE THAT A SPECIAL MARINE WARNING REMAINS IN EFFECT FOR 
EXTREME SOUTHERN LOWER DELAWARE BAY. 

LAT...LON 3933 7532 3929 7529 3935 7529 3940 7522
      3932 7528 3932 7523 3929 7523 3930 7517
      3927 7524 3924 7517 3919 7514 3923 7512
      3922 7505 3927 7501 3920 7503 3916 7488
      3898 7532 3904 7541 3919 7540 3924 7547
TIME...MOT...LOC 1839Z 238DEG 11KT 3920 7528

$$

TFG

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 9, 1:17 PM EDT	Special Marine Warning	PHI		88 min
Aug 9, 2:01 PM EDT	Special Marine Warning	PHI		119 min
Aug 9, 2:20 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Warren	70 min
Aug 9, 2:25 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Somerset	65 min
Aug 9, 2:56 PM EDT	Special Weather Statement	PHI	Sussex	94 min
Aug 9, 3:23 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	71 min
Aug 9, 3:35 PM EDT	Special Weather Statement	PHI	Mercer, Middlesex, Morris, Somerset	55 min
Aug 9, 4:18 PM EDT	Special Weather Statement	PHI	Hunterdon	57 min
Aug 9, 4:33 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer, Somerset	57 min
Aug 9, 4:57 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Mercer, Middlesex, Monmouth	78 min
Aug 9, 5:06 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Mercer, Somerset	3 hr
Aug 9, 5:08 PM EDT	Special Weather Statement	PHI	Mercer, Middlesex, Monmouth	2 hr
Aug 9, 5:26 PM EDT	Flash Flood Warning	PHI	Hunterdon, Mercer	2 hr
Aug 9, 5:48 PM EDT	Areal Flood Advisory	PHI	Middlesex	2 hr
Aug 9, 6:17 PM EDT	Flash Flood Warning	PHI	Middlesex	88 min
Aug 9, 1:00 PM EDT	Special Weather Statement	PHI	Lehigh	60 min
Aug 9, 1:22 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery	68 min
Aug 9, 1:26 PM EDT	Areal Flood Advisory	PHI	Bucks, Montgomery	3 hr
Aug 9, 1:33 PM EDT	Special Weather Statement	PHI	Northampton	57 min
Aug 9, 1:42 PM EDT	Special Weather Statement	PHI	Monroe	63 min
Aug 9, 1:45 PM EDT	Special Weather Statement	PHI	Berks	60 min
Aug 9, 2:13 PM EDT	Severe Thunderstorm Warning	PHI	Berks	77 min
Aug 9, 3:03 PM EDT	Special Weather Statement	PHI	Monroe	87 min
Aug 9, 3:05 PM EDT	Special Weather Statement	PHI	Chester, Montgomery	85 min
Aug 9, 3:11 PM EDT	Areal Flood Advisory	PHI	Carbon, Monroe	6 hr
Aug 9, 3:20 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Montgomery	55 min
Aug 9, 3:39 PM EDT	Special Weather Statement	PHI	Bucks	66 min
Aug 9, 3:57 PM EDT	Areal Flood Advisory	PHI	Chester, Montgomery	104 min
Aug 9, 3:57 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery	63 min
Aug 9, 7:01 PM EDT	Special Weather Statement	PHI	Berks	59 min
Aug 9, 7:10 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Carbon, Lehigh	80 min
Aug 9, 7:40 PM EDT	Special Weather Statement	PHI	Carbon, Monroe	95 min
Aug 9, 7:46 PM EDT	Areal Flood Advisory	PHI	Berks	3 hr
Aug 9, 12:34 PM EDT	Special Weather Statement	PHI	Kent	56 min
Aug 9, 1:04 PM EDT	Severe Thunderstorm Warning	PHI	Kent	23 min
Aug 9, 1:17 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	43 min
Aug 9, 1:39 PM EDT	Special Weather Statement	PHI	Kent	66 min
Aug 9, 1:55 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	65 min
Aug 9, 2:04 PM EDT	Special Weather Statement	PHI	Kent	56 min
Aug 9, 2:19 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	56 min
Aug 9, 2:23 PM EDT	Special Weather Statement	PHI	Sussex	52 min
Aug 9, 3:17 PM EDT	Special Weather Statement	PHI	Sussex	88 min
Aug 9, 3:42 PM EDT	Areal Flood Advisory	PHI	Sussex	119 min

Nearby

Special Marine Warnings in New Jersey, 2012 Every special marine warning 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; radar from the NEXRAD Level II archive.