Alert archive / New Jersey / Special Marine Warnings in 2013

Special Marine Warning 21, NWS Philadelphia/Mount Holly

June 16, 2013

NWS Philadelphia/Mount Holly issued this special marine warning at Jun 16, 2013, 8:15 PM EDT. It was in force for 60 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
Jun 16, 2013, 8:15 PM EDT (00:15 UTC)
Expired
Jun 16, 2013, 9:15 PM EDT
In force
60 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon

The radar

The Dover AFB radar (KDOX), 74 km from the middle of the area, began a volume at 00:18 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

Wallops Is Stn, VA (KWAL), launched 00:00Z, 0.3 hours before the alert went out and 152 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-pSkew-T log-p diagram, Wallops Is Stn, VA at 00:00Z on 2013-06-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 645 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Wallops Is Stn, VA at 00:00Z on 2013-06-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 144 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
645 J/kg
Mixed-layer CIN
-32 J/kg
Mixed-layer LCL
1344 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
144 m²/s²
0-3 km storm-relative helicity
149 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.8

Open this sounding in Storm Lab

The text

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

145 
WHUS51 KPHI 170015
SMWPHI
ANZ431-452>454-170115-
/O.NEW.KPHI.MA.W.0021.130617T0015Z-130617T0115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SPECIAL MARINE WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
815 PM EDT SUN JUN 16 2013

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SPECIAL MARINE WARNING FOR...
  THE DELAWARE BAY SOUTH OF A LINE BETWEEN EAST POINT NJ AND
  SLAUGHTER BEACH DE...
  THE ATLANTIC COASTAL WATERS BETWEEN LITTLE EGG INLET NJ AND CAPE
  HENLOPEN DE OUT TO 20 NM...


  INCLUDING OVERFALLS SHOAL...28-MILE WRECK...ATLANTIC CITY REEF...
  BUOY 2FB...BUOY 2MS...BUOY 3FB...BUOY 4FB...BUOY GE...BRIGANTINE...
  BROWN SHOAL LIGHT...CAPE MAY POINT...CAPE MAY REEF...FIVE FATHOMS
  BUOY...GREAT EGG INLET...GREAT EGG REEF...OCEAN CITY REEF...THE
  LUMP AND WILDWOOD REEF...

* UNTIL 915 PM EDT

* AT 812 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  THUNDERSTORM...PRODUCING STRONG WINDS 34 KNOTS OR GREATER OVER CAPE
  MAY POINT...MOVING EAST AT 30 KNOTS.

* THIS STRONG THUNDERSTORM WILL BE NEAR
  7 NM NORTH OF BUOY 2MS BY 830 PM EDT
  OVER BUOY 3FB BY 840 PM EDT
  OVER WILDWOOD REEF AND 3 NM NORTH OF CAPE MAY REEF BY 845 PM EDT
  7 NM NORTH OF BUOY 4FB BY 850 PM EDT
  2 NM SOUTH OF BUOY 2FB BY 855 PM EDT
  5 NM SOUTH OF 28-MILE WRECK BY 910 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.

&&

LAT...LON 3915 7496 3911 7484 3894 7497 3893 7496
      3926 7463 3928 7463 3923 7473 3930 7480
      3931 7466 3945 7473 3931 7464 3937 7458
      3931 7462 3931 7461 3948 7435 3925 7405
      3862 7473 3882 7518
TIME...MOT...LOC 0015Z 275DEG 31KT 3896 7500

$$

PO

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 16, 8:51 PM EDTSpecial Marine WarningPHI84 min
Jun 16, 10:38 PM EDTSpecial Marine WarningPHI82 min
Jun 17, 2:37 PM EDTSpecial Weather StatementPHIHunterdon, Somerset53 min
Jun 17, 2:45 PM EDTSevere Thunderstorm WarningPHIHunterdon, Middlesex, Somerset60 min
Jun 17, 3:25 PM EDTSpecial Weather StatementPHIHunterdon, Somerset65 min
Jun 17, 4:06 PM EDTSevere Thunderstorm WarningPHISalem69 min
Jun 17, 5:02 PM EDTSpecial Weather StatementPHIMercer73 min
Jun 17, 5:14 PM EDTSpecial Weather StatementPHIGloucester61 min
Jun 17, 5:48 PM EDTSpecial Weather StatementPHIMonmouth57 min
Jun 17, 5:55 PM EDTSpecial Weather StatementPHISalem65 min
Jun 17, 6:05 PM EDTSpecial Weather StatementPHIAtlantic, Salem55 min
Jun 17, 6:29 PM EDTAreal Flood AdvisoryPHISalem2 hr
Jun 17, 6:38 PM EDTSevere Thunderstorm WarningPHIAtlantic, Cape May, Cumberland, Salem67 min
Jun 17, 6:58 PM EDTSpecial Weather StatementPHICumberland, Salem92 min
Jun 16, 10:02 PM EDTSpecial Weather StatementPHISussex58 min
Jun 16, 10:48 PM EDTSpecial Weather StatementPHISussex12 min
Jun 17, 7:29 PM EDTRiver Flood WarningPHINew Castle5 hr

Nearby

Special Marine Warnings in New Jersey, 2013Every special marine warning in 2013

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.