Alert archive / New Jersey / Special Marine Warnings in 2021

Special Marine Warning 34, NWS Philadelphia/Mount Holly

June 8, 2021

NWS Philadelphia/Mount Holly issued this special marine warning at Jun 8, 2021, 4:54 PM EDT. It was in force for 96 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, 4:54 PM EDT (20:54 UTC)
Expired
Jun 8, 2021, 6:30 PM EDT
In force
96 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Hail
0.75 in
Wind
40.0 mph

The radar

The Philadelphia radar (KDIX), 42 km from the middle of the area, began a volume at 20:55 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, 8.9 hours before the alert went out and 139 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.

251 
WHUS51 KPHI 082054
SMWPHI
ANZ450-451-470-471-082230-
/O.NEW.KPHI.MA.W.0034.210608T2054Z-210608T2230Z/

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

The National Weather Service in Mount Holly NJ has issued a

* Special Marine Warning for...
  
Coastal and outer waters from Sandy Hook to Little Egg Inlet NJ...

* Until 630 PM EDT.

* At 454 PM EDT, strong thunderstorms were located along a line
  extending from near Manasquan Inlet to near Pine Beach, moving east
  at 10 knots.

  HAZARD...Wind gusts to 40 knots and small hail.

  SOURCE...Radar.

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

* Locations impacted include...
  Ocean Gate, Sea Girt Reef, Barnegat Light Reef, Axel Carlson Reef,
  Silverton, Forked River, Lavallette, Shark River Reef, Point
  Pleasant Beach, Belmar, Seaside Park, Manasquan Inlet, Pine Beach
  and Barnegat Light.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Boaters should seek safe harbor immediately until these storms pass.
Wind gusts to 40 knots, small hail, high waves, dangerous lightning,
and heavy rain are possible with these storms.

&&

LAT...LON 3964 7382 3982 7426 3990 7420 3992 7423
      4019 7402 4013 7353 4007 7348
TIME...MOT...LOC 2054Z 289DEG 9KT 4013 7399 3989 7418 

HAIL...<.75IN
WIND...40KTS

$$

Staarmann
2 follow-up statements
539 
FZUS71 KPHI 082120
MWSPHI

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

ANZ450-451-470-471-082230-
/O.CON.KPHI.MA.W.0034.000000T0000Z-210608T2230Z/
520 PM EDT Tue Jun 8 2021

...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 630 PM EDT...

For the following areas...
Coastal waters from Manasquan Inlet to Little Egg Inlet NJ out 20
nm...
Coastal waters from Sandy Hook to Manasquan Inlet NJ out 20 nm...
Waters from Manasquan Inlet NJ to Little Egg Inlet NJ out 20 to 40
nm...
Waters from Sandy Hook NJ to Manasquan Inlet NJ out 20 to 40 nm...

At 519 PM EDT, severe thunderstorms producing quarter sized hail and 
capable of producing waterspouts were located along a line extending 
from near Sea Girt Reef to near Forked River, moving east at 10 
knots.

HAZARD...Waterspouts, wind gusts to 40 knots, and large hail.

SOURCE...Marine weather spotter.

IMPACT...Waterspouts can easily overturn boats and create locally 
         hazardous seas. Small craft could be damaged in briefly 
         higher winds and suddenly higher waves. Large hail could 
         result in structural damage.

Locations impacted include...
Ocean Gate, Sea Girt Reef, Shark River Reef, Seaside Park, Barnegat
Light Reef, Pine Beach, Axel Carlson Reef, Silverton, Forked River,
Lavallette, Point Pleasant Beach and Barnegat Light.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Boaters should seek safe harbor immediately until these storms pass.
Wind gusts to 40 knots, large hail, high waves, dangerous lightning,
and heavy rain are possible with these storms.

Thunderstorms can produce sudden waterspouts. Waterspouts can easily
overturn boats and create locally hazardous seas. Seek safe harbor
immediately.

&&

LAT...LON 3964 7382 3982 7426 3990 7420 3992 7423
      4017 7395 4013 7353 4007 7348
TIME...MOT...LOC 2119Z 289DEG 9KT 4011 7392 3987 7411 

WATERSPOUT...POSSIBLE
HAIL...>.75IN
WIND...40KTS

$$

Staarmann
028 
FZUS71 KPHI 082149
MWSPHI

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

ANZ450-470-082159-
/O.CAN.KPHI.MA.W.0034.000000T0000Z-210608T2230Z/
549 PM EDT Tue Jun 8 2021

...THE SPECIAL MARINE WARNING IS CANCELLED...

The affected areas were...

Coastal and outer waters from Sandy Hook to Manasquan Inlet NJ...

The thunderstorms have moved out of the warned area and no longer 
pose a significant threat to boaters.

LAT...LON 3964 7382 3965 7384 3981 7424 3995 7413
      3983 7367
TIME...MOT...LOC 2149Z 290DEG 7KT 3987 7410 3977 7417 

$$

ANZ451-471-082230-
/O.CON.KPHI.MA.W.0034.000000T0000Z-210608T2230Z/
549 PM EDT Tue Jun 8 2021

...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 630 PM EDT...

For the following areas...
Coastal waters from Manasquan Inlet to Little Egg Inlet NJ out 20
nm...
Waters from Manasquan Inlet NJ to Little Egg Inlet NJ out 20 to 40
nm...

At 549 PM EDT, severe thunderstorms capable of producing waterspouts
were located along a line extending from near Seaside Park to near
Forked River, moving east at 5 knots.

HAZARD...Waterspouts, wind gusts 34 knots or greater, and small 
         hail.

SOURCE...Radar indicated.

IMPACT...Waterspouts can easily overturn boats and create locally 
         hazardous seas. Small craft could be damaged in briefly 
         higher winds and suddenly higher waves.

Locations impacted include...
Ocean Gate, Forked River, Seaside Park, Barnegat Light Reef and
Barnegat Light.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Move to safe harbor until hazardous weather passes.

&&

LAT...LON 3964 7382 3965 7384 3981 7424 3995 7413
      3983 7367
TIME...MOT...LOC 2149Z 290DEG 7KT 3987 7410 3977 7417 

WATERSPOUT...POSSIBLE
HAIL...<.75IN
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, 4:14 PM EDTSpecial Marine WarningPHI91 min
Jun 8, 4:44 PM EDTSpecial Weather StatementPHISalem31 min
Jun 8, 4:47 PM EDTSevere Thunderstorm WarningPHIGloucester, Salem43 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.