Alert archive / New Jersey / Special Marine Warnings in 2011

Special Marine Warning 21, NWS Philadelphia/Mount Holly

May 4, 2011

NWS Philadelphia/Mount Holly issued this special marine warning at May 4, 2011, 11:06 AM 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: May 4, 2011, 11:06 AM EDT (15:06 UTC)
Expired: May 4, 2011, 12:00 PM EDT
In force: 54 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

The radar

The Philadelphia radar (KDIX), 92 km from the middle of the area, began a volume at 15:08 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, 3.1 hours before the alert went out and 154 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 551 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: -92 m²/s²
0-3 km storm-relative helicity: 148 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.

920 
WHUS51 KPHI 041506
SMWPHI
ANZ451>454-470-041600-
/O.NEW.KPHI.MA.W.0021.110504T1506Z-110504T1600Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SPECIAL MARINE WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1106 AM EDT WED MAY 4 2011

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SPECIAL MARINE WARNING FOR...
  THE ATLANTIC COASTAL WATERS BETWEEN MANASQUAN INLET NJ AND CAPE
  HENLOPEN DE OUT TO 20 NM...
  THE ATLANTIC COASTAL WATERS BETWEEN SANDY HOOK NJ AND FENWICK
  ISLAND DE OUT 20 TO 40 NM...

  INCLUDING 28-MILE WRECK...ATLANTIC CITY REEF...BUOY 2FB...BUOY
  2MS...BUOY 3FB...BUOY 4FB...CAPE MAY REEF...DEEPWATER REEF...FIVE
  FATHOMS BUOY...GARDEN STATE NORTH REEF...GARDEN STATE SOUTH REEF...
  GREAT EGG REEF...LITTLE EGG REEF...OCEAN CITY REEF...THE LUMP AND
  WILDWOOD REEF...

* UNTIL NOON EDT

* AT 1103 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF THUNDERSTORMS...PRODUCING STRONG WINDS 34 KNOTS OR GREATER
  FROM LITTLE EGG REEF TO 12 NM EAST OF ATLANTIC CITY REEF...MOVING
  NORTHEAST AT 40 KNOTS.

* THESE STRONG THUNDERSTORMS WILL BE NEAR
  OVER GARDEN STATE NORTH REEF BY 1115 AM 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.

&&

LAT...LON 3840 7470 3861 7471 3870 7480 3880 7498
      3940 7438 3942 7434 3945 7433 3973 7406
      3963 7388 3954 7378 3933 7378
TIME...MOT...LOC 1506Z 217DEG 57KT 3949 7415 3945 7406
          3937 7397 3924 7399

$$

HAYES

2 follow-up statements

526 
FZUS71 KPHI 041539
MWSPHI

MARINE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1139 AM EDT WED MAY 4 2011

ANZ451>454-470-041600-
/O.CON.KPHI.MA.W.0021.000000T0000Z-110504T1600Z/
1139 AM EDT WED MAY 4 2011

...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL NOON EDT...

FOR THE FOLLOWING AREAS...
WATERS FROM SANDY HOOK NJ TO FENWICK ISLAND DE FROM 20 TO 40 NM OVER
ATLANTIC COASTAL WATERS...
COASTAL WATERS FROM CAPE MAY NJ TO CAPE HENLOPEN DE OUT 20 NM OVER
ATLANTIC COASTAL WATERS...
COASTAL WATERS FROM GREAT EGG INLET TO CAPE MAY NJ OUT 20 NM OVER
ATLANTIC COASTAL WATERS...
COASTAL WATERS FROM LITTLE EGG INLET TO GREAT EGG INLET NJ OUT 20 NM
OVER ATLANTIC COASTAL WATERS...
COASTAL WATERS FROM MANASQUAN INLET TO LITTLE EGG INLET NJ OUT 20 NM
OVER ATLANTIC COASTAL WATERS...
INCLUDING 28-MILE WRECK...ATLANTIC CITY REEF...BUOY 2FB...BUOY 2MS...
BUOY 3FB...BUOY 4FB...CAPE MAY REEF...DEEPWATER REEF...FIVE FATHOMS
BUOY...GARDEN STATE NORTH REEF...GARDEN STATE SOUTH REEF...GREAT EGG
REEF...LITTLE EGG REEF...OCEAN CITY REEF...THE LUMP AND WILDWOOD
REEF...

AT 1134 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF THUNDERSTORMS...PRODUCING STRONG WINDS 34 KNOTS OR
GREATER FROM OCEAN CITY REEF TO DEEPWATER REEF...MOVING NORTHEAST AT 
40 KNOTS.

THESE STRONG THUNDERSTORMS WILL BE NEAR
  OVER LITTLE EGG REEF BY 1155 AM EDT...
  2 NM SOUTHWEST OF GARDEN STATE SOUTH REEF AND 8 NM SOUTHWEST OF
  GARDEN STATE NORTH REEF BY NOON EDT...

ANOTHER LINE OF STRONG THUNDERSTORMS WILL AFFECT THE WATERS AHEAD OF 
THE MAIN LINE OF STORMS.

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.

&&

LAT...LON 3840 7470 3861 7471 3870 7480 3880 7498
      3940 7438 3942 7434 3945 7433 3973 7406
      3963 7388 3954 7378 3933 7378
TIME...MOT...LOC 1538Z 217DEG 57KT 3927 7445 3922 7432
          3912 7424 3905 7412

$$

HAYES

103 
FZUS71 KPHI 041603
MWSPHI

MARINE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1203 PM EDT WED MAY 4 2011

ANZ451>454-470-041613-
/O.EXP.KPHI.MA.W.0021.000000T0000Z-110504T1600Z/
1203 PM EDT WED MAY 4 2011

...SPECIAL MARINE WARNING HAS EXPIRED...

THE STORMS THAT PROMPTED THE SPECIAL MARINE WARNING HAVE WEAKENED 
AND ARE MOVING OUT OF THE AREA.

LAT...LON 3840 7470 3861 7471 3870 7480 3880 7498
      3940 7438 3942 7434 3945 7433 3973 7406
      3963 7388 3954 7378 3933 7378
TIME...MOT...LOC 1539Z 217DEG 57KT 3927 7442 3922 7429
          3912 7421 3905 7409

$$

HAYES

The office that day

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

Issued	Product	Office	Counties	Lasted
May 3, 8:47 PM EDT	Special Weather Statement	PHI	Warren	58 min
May 3, 9:43 PM EDT	Special Weather Statement	PHI	Sussex, Warren	47 min
May 4, 7:34 AM EDT	Special Weather Statement	PHI	Atlantic, Cape May	56 min
May 4, 7:58 AM EDT	Special Weather Statement	PHI	Burlington, Camden, Ocean	62 min
May 4, 8:31 AM EDT	Special Weather Statement	PHI	Atlantic, Cape May	59 min
May 4, 8:47 AM EDT	Special Weather Statement	PHI	Cape May	58 min
May 4, 9:09 AM EDT	Special Marine Warning	PHI		66 min
May 4, 10:13 AM EDT	Special Marine Warning	PHI		62 min
May 4, 11:27 AM EDT	Small Craft Advisory	PHI		4 hr
May 4, 3:29 PM EDT	Small Craft Advisory	PHI		27 hr
May 3, 8:06 PM EDT	Special Weather Statement	PHI	Carbon	39 min
May 3, 8:15 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	30 min

Nearby

Special Marine Warnings in New Jersey, 2011 Every special marine warning 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.