Alert archive / New Jersey / Special Marine Warnings in 2021

Special Marine Warning 26, NWS Philadelphia/Mount Holly

May 26, 2021

NWS Philadelphia/Mount Holly issued this special marine warning at May 26, 2021, 11:21 PM EDT. It was in force for 54 min. 4 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 26, 2021, 11:21 PM EDT (03:21 UTC)
Expired: May 27, 2021, 12:15 AM EDT
In force: 54 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 34.0 mph

The radar

The Philadelphia radar (KDIX), 50 km from the middle of the area, began a volume at 03:22 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.

What was reported inside it

Time	Report	Where	Remark
May 26, 11:30 PM EDT	MARINE TSTM WIND 44	2 Nne Waretown, NJ
May 26, 11:35 PM EDT	MARINE TSTM WIND 40	1 Ese Lanoka Harbor, NJ
May 26, 11:36 PM EDT	MARINE TSTM WIND 45	1 Ne Lanoka Harbor, NJ	TRIXIES WEATHERFLOW STATION.
May 26, 11:40 PM EDT	MARINE TSTM WIND 41	1 Ssw Mantoloking, NJ

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Brookhaven, NY (KOKX), launched 00:00Z, 3.4 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-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: 357 J/kg
Mixed-layer CIN: -174 J/kg
Mixed-layer LCL: 956 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 87 m²/s²
0-3 km storm-relative helicity: 194 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

955 
WHUS51 KPHI 270321
SMWPHI
ANZ450-451-470-471-270415-
/O.NEW.KPHI.MA.W.0026.210527T0321Z-210527T0415Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Special Marine Warning
National Weather Service Mount Holly NJ
1121 PM EDT Wed May 26 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 1215 AM EDT.

* At 1121 PM EDT, a strong thunderstorm was located 7 nm west of
  Forked River, moving east at 50 knots.

  HAZARD...Wind gusts 34 knots or greater and small hail.

  SOURCE...Radar.

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

* Locations impacted include...
  Ocean Gate, Barnegat Light, Seaside Park, Barnegat Light Reef, Pine
  Beach, Silverton, Harvey Cedars, Forked River and Lavallette.

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.

Move to safe harbor until hazardous weather passes.

Report severe weather to the Coast Guard or the National Weather
Service.

&&

LAT...LON 3968 7331 3970 7426 3982 7427 3990 7420
      3993 7425 3996 7425 4001 7420 4011 7351
      3994 7337 3977 7330
TIME...MOT...LOC 0321Z 263DEG 49KT 3984 7430 

HAIL...<.75IN
WIND...>34KTS

$$

MPS

2 follow-up statements

074 
FZUS71 KPHI 270349
MWSPHI

Marine Weather Statement
National Weather Service Mount Holly NJ
1149 PM EDT Wed May 26 2021

ANZ450-451-470-471-270415-
/O.CON.KPHI.MA.W.0026.000000T0000Z-210527T0415Z/
1149 PM EDT Wed May 26 2021

...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 1215 AM 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 1147 PM EDT, a strong thunderstorm was located near Barnegat Light
Reef, moving east at 35 knots.

HAZARD...Wind gusts 34 knots or greater and small hail.

SOURCE...Radar indicated. At 11:36 pm, a 41 knot wind gust was 
         reported at Seaside Heights.

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

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

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.

Move to safe harbor until hazardous weather passes.

Report severe weather to the Coast Guard or the National Weather
Service.

&&

LAT...LON 3975 7410 4000 7413 4006 7388 4010 7358
      3982 7348
TIME...MOT...LOC 0347Z 259DEG 35KT 3989 7398 

HAIL...<.75IN
WIND...>34KTS

$$

MPS

535 
FZUS71 KPHI 270408
MWSPHI

Marine Weather Statement
National Weather Service Mount Holly NJ
1208 AM EDT Thu May 27 2021

ANZ450-451-470-471-270417-
/O.EXP.KPHI.MA.W.0026.000000T0000Z-210527T0415Z/
1208 AM EDT Thu May 27 2021

...THE SPECIAL MARINE WARNING WILL EXPIRE AT 1215 AM EDT...

The affected areas were... 

Coastal and outer waters from Sandy Hook to Little Egg Inlet NJ...

The thunderstorm has moved out of the area and no longer poses a
significant threat to boaters.

LAT...LON 3975 7410 4000 7413 4006 7388 4010 7358
      3982 7348
TIME...MOT...LOC 0407Z 263DEG 49KT 3992 7366 

$$

MPS

The office that day

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

Issued	Product	Office	Counties	Lasted
May 26, 8:36 PM EDT	Special Weather Statement	PHI	Cape May	39 min
May 26, 8:40 PM EDT	Special Marine Warning	PHI		65 min
May 26, 10:14 PM EDT	Special Weather Statement	PHI	Atlantic, Burlington, Camden, Gloucester	46 min
May 26, 10:35 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Ocean	40 min
May 26, 10:40 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Gloucester	50 min
May 26, 11:20 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Ocean	40 min
May 27, 12:07 AM EDT	Special Marine Warning	PHI		23 min
May 27, 3:30 PM EDT	Gale Watch	PHI		12 hr
May 26, 9:32 PM EDT	Special Weather Statement	PHI	Carbon	43 min

Nearby

Special Marine Warnings in New Jersey, 2021 Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.