Alert archive / New Jersey / Special Marine Warnings in 2021

Special Marine Warning 25, NWS Philadelphia/Mount Holly

May 26, 2021

NWS Philadelphia/Mount Holly issued this special marine warning at May 26, 2021, 8:40 PM EDT. It was in force for 65 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 26, 2021, 8:40 PM EDT (00:40 UTC)
Expired: May 26, 2021, 9:45 PM EDT
In force: 65 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.0 in
Wind: 34.0 mph

The radar

The Dover AFB radar (KDOX), 87 km from the middle of the area, began a volume at 00:40 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, 0.7 hours before the alert went out and 156 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: 662 J/kg
Mixed-layer CIN: -117 J/kg
Mixed-layer LCL: 1474 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 147 m²/s²
0-3 km storm-relative helicity: 206 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.7

Open this sounding in Storm Lab

The text

As transmitted.

307 
WHUS51 KPHI 270040
SMWPHI
ANZ452-453-270145-
/O.NEW.KPHI.MA.W.0025.210527T0040Z-210527T0145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Special Marine Warning
National Weather Service Mount Holly NJ
840 PM EDT Wed May 26 2021

The National Weather Service in Mount Holly NJ has issued a

* Special Marine Warning for...
  
Coastal waters from Little Egg Inlet to Cape May NJ out 20 nm...

* Until 945 PM EDT.

* At 839 PM EDT, a strong thunderstorm was located 7 nm southeast of
  East Point, moving east at 40 knots.

  HAZARD...Wind gusts 34 knots or greater.

  SOURCE...Radar.

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

* Locations impacted include...
  The Lump, 28-
  Mile Wreck, Atlantic City, Atlantic City Reef, Great Egg Inlet,
  Brigantine, Sea Isle City, Great Egg Reef, Ocean City Reef,
  Wildwood Reef and Wildwood.

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.

&&

LAT...LON 3894 7490 3915 7476 3947 7438 3944 7428
      3916 7412 3899 7439
TIME...MOT...LOC 0039Z 250DEG 40KT 3909 7493 

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

$$

Meola

1 follow-up statement

273 
FZUS71 KPHI 270139
MWSPHI

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

ANZ452-453-270145-
/O.CON.KPHI.MA.W.0025.000000T0000Z-210527T0145Z/
939 PM EDT Wed May 26 2021

...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 945 PM EDT...

For the following areas...
Coastal waters from Great Egg Inlet to Cape May NJ out 20 nm...
Coastal waters from Little Egg Inlet to Great Egg Inlet NJ out 20
nm...

At 938 PM EDT, a strong thunderstorm was located near 28-
Mile Wreck, moving east at 25 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...
28-Mile Wreck, Atlantic City, Atlantic City Reef, Great Egg Reef,
Great Egg Inlet and Brigantine.

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.

&&

LAT...LON 3916 7414 3913 7416 3899 7439 3898 7448
      3932 7455 3947 7438 3944 7428 3916 7412
TIME...MOT...LOC 0138Z 250DEG 26KT 3908 7434 

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

$$

Meola

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, 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 26, 11:21 PM EDT	Special Marine Warning	PHI		54 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.