Alert archive / New Jersey / Special Marine Warnings in 2021

Special Marine Warning 63, NWS Philadelphia/Mount Holly

July 1, 2021

NWS Philadelphia/Mount Holly issued this special marine warning at Jul 1, 2021, 5:46 PM EDT. It was in force for 119 min. 3 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
Jul 1, 2021, 5:46 PM EDT (21:46 UTC)
Expired
Jul 1, 2021, 7:45 PM EDT
In force
119 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Hail
0.0 in
Wind
50.0 mph

The radar

The Philadelphia radar (KDIX), 37 km from the middle of the area, began a volume at 21:48 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

TimeReportWhereRemark
Jul 1, 6:20 PM EDTTSTM WND DMG2 Ese Leisure Village E, NJSEVERAL REPORTS OF DOWNED WIRES IN BRICK TOWNSHIP AND THE LEISURE VILLAGE EAST AREA. TIME ESTIMATED FROM RADAR.
Jul 1, 6:25 PM EDTTSTM WND DMG2 Nnw Wanamassa, NJSEVERAL REPORTS OF DOWNED POWER LINES IN THE WANAMASSA AND DEAL AREAS. TIME ESTIMATED FROM RADAR.
Jul 1, 6:44 PM EDTTSTM WND GST 47Surf City, NJWEATHERFLOW.

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 12:00Z, 9.8 hours before the alert went out and 135 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 2021-07-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 286 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 2021-07-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 22 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
286 J/kg
Mixed-layer CIN
-126 J/kg
Mixed-layer LCL
978 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
22 m²/s²
0-3 km storm-relative helicity
84 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

As transmitted.

734 
WHUS51 KPHI 012146
SMWPHI
ANZ450>452-470>472-012345-
/O.NEW.KPHI.MA.W.0063.210701T2146Z-210701T2345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Special Marine Warning
National Weather Service Mount Holly NJ
546 PM EDT Thu Jul 1 2021

The National Weather Service in Mount Holly NJ has issued a

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

* Until 745 PM EDT.

* At 546 PM EDT, severe thunderstorms capable of producing
  waterspouts were located along a line extending from 13 nm west of
  Belmar to 15 nm northwest of Buoy Ge, moving east at 20 knots.

  HAZARD...Waterspouts and wind gusts in excess of 50 knots.

  SOURCE...Law enforcement.

  IMPACT...Waterspouts can easily overturn boats and create locally 
           hazardous seas. Boats could suffer significant structural 
           damage in high winds. Small craft could capsize in 
           suddenly higher waves.

* Locations impacted include...
  Sea Girt Reef, Atlantic City, Ship Bottom, Atlantic Highlands,
  Garden State South Reef, Axel Carlson Reef, Silverton, Harvey
  Cedars, Lavallette, Barnegat Light, North Beach Haven, Point
  Pleasant Beach, Seaside Park, Brigantine, Ocean Gate, Little Egg
  Reef, Atlantic City Reef, Barnegat Light Reef, Monmouth Beach and
  Sea Bright.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4044 7398 4024 7363 3986 7333 3966 7331
      3936 7344 3906 7367 3938 7464 3970 7426
      3982 7426 3990 7420 3992 7423 3999 7421
      4020 7411 4024 7405 4027 7405 4031 7411
      4040 7409 4042 7405 4040 7398
TIME...MOT...LOC 2146Z 289DEG 22KT 4021 7433 3947 7483 

WATERSPOUT...POSSIBLE
HAIL...0.00IN
WIND...50KTS

$$

CMS
1 follow-up statement
440 
FZUS71 KPHI 012304
MWSPHI

Marine Weather Statement
National Weather Service Mount Holly NJ
704 PM EDT Thu Jul 1 2021

ANZ450>452-470>472-012345-
/O.CON.KPHI.MA.W.0063.000000T0000Z-210701T2345Z/
704 PM EDT Thu Jul 1 2021

...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 745 PM EDT...

For the following areas...
Coastal waters from Little Egg Inlet to Great Egg Inlet NJ out 20
nm...
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 Little Egg Inlet NJ to Great Egg Inlet NJ out 20 to 40 nm
from 20 to 40 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 703 PM EDT, severe thunderstorms capable of producing waterspouts
were located along a line extending from near Entrance to New York
Harbor to 12 nm east of Barnegat Light Reef to 23 nm southeast of
Garden State North Reef to 27 nm east of Deepwater Reef, moving
northeast at 45 knots.

HAZARD...Waterspouts and wind gusts to 40 knots.

SOURCE...Law enforcement.

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...
Sea Girt Reef, Barnegat Light, Garden State North Reef, Shark River
Reef, Seaside Park, Barnegat Light Reef, Axel Carlson Reef, Harvey
Cedars, Forked River, Lavallette, Point Pleasant Beach and Ocean
Gate.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3948 7338 3936 7344 3906 7367 3926 7402
      3945 7400 3977 7421 4038 7388 4023 7362
      3985 7333 3966 7331
TIME...MOT...LOC 2303Z 244DEG 43KT 4033 7371 3976 7377 3947 7357 3913
7364

WATERSPOUT...POSSIBLE
HAIL...0.00IN
WIND...40KTS

$$

Robertson

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 30, 8:37 PM EDTSevere Thunderstorm WarningPHIHunterdon, Mercer38 min
Jun 30, 8:56 PM EDTSpecial Marine WarningPHI94 min
Jun 30, 9:05 PM EDTSpecial Weather StatementPHISomerset40 min
Jun 30, 9:21 PM EDTSpecial Weather StatementPHISalem39 min
Jun 30, 9:49 PM EDTSpecial Weather StatementPHIMonmouth26 min
Jun 30, 9:51 PM EDTSpecial Marine WarningPHI60 min
Jul 1, 2:58 AM EDTSmall Craft AdvisoryPHI17 hr
Jul 1, 1:10 PM EDTSpecial Weather StatementPHIMonmouth50 min
Jul 1, 1:16 PM EDTSpecial Weather StatementPHIAtlantic29 min
Jul 1, 1:28 PM EDTSpecial Marine WarningPHI62 min
Jul 1, 1:31 PM EDTSpecial Weather StatementPHICumberland29 min
Jul 1, 4:21 PM EDTSpecial Marine WarningPHI114 min
Jul 1, 4:27 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden, Gloucester, Hunterdon, Mercer, Salem and 1 more48 min
Jul 1, 4:55 PM EDTSevere Thunderstorm WarningPHICape May, Cumberland, Salem80 min
Jul 1, 4:59 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden, Gloucester, Mercer, Middlesex, Monmouth and 2 more46 min
Jul 1, 5:02 PM EDTTornado WarningPHIBurlington, Mercer28 min
Jul 1, 5:27 PM EDTSevere Thunderstorm WarningPHIAtlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 5 more93 min
Jul 1, 5:35 PM EDTTornado WarningPHIMercer, Monmouth, Ocean25 min
Jul 1, 5:40 PM EDTSpecial Marine WarningPHI65 min
Jul 1, 6:13 PM EDTSpecial Marine WarningPHI92 min
Jun 30, 8:16 PM EDTSpecial Weather StatementPHIBucks, Montgomery44 min
Jul 1, 2:51 PM EDTSpecial Weather StatementPHIChester, Montgomery39 min
Jul 1, 3:13 PM EDTSevere Thunderstorm WarningPHIBerks, Bucks, Chester, Lehigh, Montgomery47 min
Jul 1, 3:23 PM EDTAreal Flood AdvisoryPHIChester, Montgomery77 min
Jul 1, 3:48 PM EDTAreal Flood AdvisoryPHIBucks, Delaware, Montgomery, Philadelphia112 min
Jul 1, 3:50 PM EDTSevere Thunderstorm WarningPHIBucks, Chester, Delaware, Montgomery, Philadelphia40 min
Jul 1, 4:08 PM EDTSevere Thunderstorm WarningPHISussex52 min
Jul 1, 4:08 PM EDTSevere Thunderstorm WarningPHIKent52 min
Jul 1, 4:10 PM EDTAreal Flood AdvisoryPHIKent, New Castle94 min
Jul 1, 4:32 PM EDTSevere Thunderstorm WarningPHIKent, New Castle, Sussex43 min
Jul 1, 4:57 PM EDTTornado WarningPHIKent, Sussex22 min
Jul 1, 5:12 PM EDTSevere Thunderstorm WarningPHIKent, Sussex48 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.