Alert archive / New Jersey / Special Marine Warnings in 2021

Special Marine Warning 33, NWS Philadelphia/Mount Holly

June 8, 2021

NWS Philadelphia/Mount Holly issued this special marine warning at Jun 8, 2021, 4:14 PM EDT. It was in force for 91 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 8, 2021, 4:14 PM EDT (20:14 UTC)
Expired
Jun 8, 2021, 5:45 PM EDT
In force
91 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Hail
0.75 in
Wind
49.0 mph

The radar

The Philadelphia radar (KDIX), 53 km from the middle of the area, began a volume at 20:14 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, 8.2 hours before the alert went out and 115 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, Brookhaven, NY at 12:00Z on 2021-06-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 740 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 12:00Z on 2021-06-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 14 square meters per square second.1939Sfc1 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
740 J/kg
Mixed-layer CIN
-106 J/kg
Mixed-layer LCL
1004 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
14 m²/s²
0-3 km storm-relative helicity
9 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

819 
WHUS51 KPHI 082014
SMWPHI
ANZ450-082145-
/O.NEW.KPHI.MA.W.0033.210608T2014Z-210608T2145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Special Marine Warning
National Weather Service Mount Holly NJ
414 PM EDT Tue Jun 8 2021

The National Weather Service in Mount Holly NJ has issued a

* Special Marine Warning for...
  
Coastal waters from Sandy Hook to Manasquan Inlet NJ out 20 nm...

* Until 545 PM EDT.

* At 413 PM EDT, severe thunderstorms were located along a line
  extending from Leonardo to near Belmar, moving east at 10 knots.

  HAZARD...Wind gusts to nearly 50 knots and large hail.

  SOURCE...Radar.

  IMPACT...Small craft could be damaged in briefly higher winds and 
           suddenly higher waves. Large hail could result in 
           structural damage.

* Locations impacted include...
  Sea Girt Reef, Leonardo, Shark River Reef, Belmar, Atlantic
  Highlands, Manasquan Inlet, Monmouth Beach, Sea Bright, Sandy Hook
  Reef, Fair Haven and Point Pleasant Beach.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Boaters should seek safe harbor immediately until these storms pass.
Wind gusts to nearly 50 knots, large hail, high waves, dangerous
lightning, and heavy rain are possible with these storms.

&&

LAT...LON 4044 7399 4026 7365 4000 7371 4013 7414
      4020 7411 4024 7405 4027 7405 4031 7412
      4034 7414 4036 7413 4042 7406 4040 7398
      4042 7398 4042 7400
TIME...MOT...LOC 2013Z 265DEG 10KT 4041 7405 4016 7410 

HAIL...>.75IN
WIND...49KTS

$$

Staarmann
2 follow-up statements
610 
FZUS71 KPHI 082052
MWSPHI

Marine Weather Statement
National Weather Service Mount Holly NJ
452 PM EDT Tue Jun 8 2021

ANZ450-082145-
/O.CON.KPHI.MA.W.0033.000000T0000Z-210608T2145Z/
452 PM EDT Tue Jun 8 2021

...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 545 PM EDT...

For the following areas...
Coastal waters from Sandy Hook to Manasquan Inlet NJ out 20 nm...

At 452 PM EDT, severe thunderstorms were located along a line
extending from near Entrance to New York Harbor to Manasquan Inlet,
moving east at 10 knots.

HAZARD...Wind gusts to nearly 50 knots and large hail.

SOURCE...Radar indicated.

IMPACT...Small craft could be damaged in briefly higher winds and 
         suddenly higher waves. Large hail could result in 
         structural damage.

Locations impacted include...
Sea Girt Reef, Shark River Reef, Belmar, Manasquan Inlet and Point
Pleasant Beach.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Protecting yourself from immediate threats to life and safety shall
take priority.  Whenever possible, as long as it does not cause
greater harm, all COVID-19 protective action guidance should be
followed.

Boaters should seek safe harbor immediately until these storms pass.
Wind gusts to nearly 50 knots, large hail, high waves, dangerous
lightning, and heavy rain are possible with these storms.

&&

LAT...LON 4026 7365 4001 7371 4010 7401 4010 7404
      4011 7405 4012 7409 4040 7392
TIME...MOT...LOC 2052Z 275DEG 11KT 4034 7382 4010 7400 

HAIL...>.75IN
WIND...49KTS

$$

Staarmann
971 
FZUS71 KPHI 082118
MWSPHI

Marine Weather Statement
National Weather Service Mount Holly NJ
518 PM EDT Tue Jun 8 2021

ANZ450-082145-
/O.CON.KPHI.MA.W.0033.000000T0000Z-210608T2145Z/
518 PM EDT Tue Jun 8 2021

...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 545 PM EDT...

For the following areas...
Coastal waters from Sandy Hook to Manasquan Inlet NJ out 20 nm...

At 517 PM EDT, strong thunderstorms were located along a line
extending from near Entrance to New York Harbor to near Sea Girt
Reef, moving east at 10 knots.

HAZARD...Wind gusts 34 knots or greater.

SOURCE...Radar indicated.

IMPACT...Small craft could be damaged in briefly higher winds and 
         suddenly higher waves.

Locations impacted include...
Sea Girt Reef and Shark River Reef. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Move to safe harbor immediately as gusty winds and high waves are
expected.

&&

LAT...LON 4026 7365 4001 7371 4011 7402 4036 7384
TIME...MOT...LOC 2117Z 265DEG 10KT 4035 7374 4011 7392 

HAIL...0.00IN
WIND...>34KTS

$$

Staarmann

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 8, 1:27 PM EDTAreal Flood AdvisoryPHIWarren3 hr
Jun 8, 1:49 PM EDTSpecial Weather StatementPHIWarren26 min
Jun 8, 1:54 PM EDTAreal Flood AdvisoryPHIMorris, Sussex95 min
Jun 8, 2:19 PM EDTAreal Flood AdvisoryPHIHunterdon, Mercer2 hr
Jun 8, 2:29 PM EDTSpecial Weather StatementPHIMorris16 min
Jun 8, 2:48 PM EDTSpecial Weather StatementPHIHunterdon, Morris, Somerset27 min
Jun 8, 3:13 PM EDTSpecial Weather StatementPHIHunterdon, Somerset32 min
Jun 8, 3:14 PM EDTAreal Flood AdvisoryPHIMiddlesex, Somerset74 min
Jun 8, 4:12 PM EDTSevere Thunderstorm WarningPHIMonmouth48 min
Jun 8, 4:44 PM EDTSpecial Weather StatementPHISalem31 min
Jun 8, 4:47 PM EDTSevere Thunderstorm WarningPHIGloucester, Salem43 min
Jun 8, 4:54 PM EDTSpecial Marine WarningPHI96 min
Jun 8, 4:56 PM EDTSevere Thunderstorm WarningPHIAtlantic, Camden, Gloucester49 min
Jun 8, 4:58 PM EDTSevere Thunderstorm WarningPHIOcean47 min
Jun 8, 5:30 PM EDTSevere Thunderstorm WarningPHIAtlantic, Burlington, Camden, Cumberland, Gloucester, Salem45 min
Jun 8, 5:43 PM EDTSpecial Weather StatementPHIOcean32 min
Jun 8, 6:01 PM EDTSevere Thunderstorm WarningPHIAtlantic, Burlington, Ocean44 min
Jun 8, 6:22 PM EDTSpecial Marine WarningPHI83 min
Jun 8, 7:39 PM EDTSpecial Marine WarningPHI66 min
Jun 8, 7:52 PM EDTSpecial Weather StatementPHICape May38 min
Jun 8, 11:54 AM EDTAreal Flood AdvisoryPHIMonroe2 hr
Jun 8, 12:34 PM EDTFlash Flood WarningPHIMonroe2 hr
Jun 8, 12:40 PM EDTSpecial Weather StatementPHIMonroe35 min
Jun 8, 1:09 PM EDTSpecial Weather StatementPHIMonroe21 min
Jun 8, 1:17 PM EDTSpecial Weather StatementPHIChester13 min
Jun 8, 1:18 PM EDTAreal Flood AdvisoryPHIChester, Delaware, Montgomery, Philadelphia3 hr
Jun 8, 1:24 PM EDTSpecial Weather StatementPHIDelaware21 min
Jun 8, 1:35 PM EDTFlash Flood WarningPHIChester, Delaware, Montgomery5 hr
Jun 8, 2:07 PM EDTSpecial Weather StatementPHIBucks23 min
Jun 8, 2:43 PM EDTSpecial Weather StatementPHIMontgomery32 min
Jun 8, 3:15 PM EDTSpecial Weather StatementPHIChester30 min
Jun 8, 3:21 PM EDTFlash Flood WarningPHIChester, Montgomery3 hr
Jun 8, 3:43 PM EDTSpecial Weather StatementPHIChester32 min
Jun 8, 4:20 PM EDTSpecial Weather StatementPHIChester25 min
Jun 8, 4:25 PM EDTRiver Flood WarningPHIChester11 hr
Jun 8, 6:21 PM EDTAreal Flood WarningPHIChester, Delaware15 hr
Jun 8, 7:14 PM EDTRiver Flood WarningPHIChester, Delaware18 hr
Jun 8, 7:43 PM EDTSpecial Weather StatementPHISussex32 min

Nearby

Special Marine Warnings in New Jersey, 2021Every special marine warning in 2021

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.