Alert archive / New Jersey / Special Marine Warnings in 2021

Special Marine Warning 32, NWS Philadelphia/Mount Holly

June 4, 2021

NWS Philadelphia/Mount Holly issued this special marine warning at Jun 4, 2021, 7:13 PM EDT. It was in force for 62 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 4, 2021, 7:13 PM EDT (23:13 UTC)
Expired
Jun 4, 2021, 8:15 PM EDT
In force
62 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), 101 km from the middle of the area, began a volume at 23:14 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

Wallops Is Stn, VA (KWAL), launched 12:00Z, 11.2 hours before the alert went out and 175 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, Wallops Is Stn, VA at 12:00Z on 2021-06-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 396 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Wallops Is Stn, VA at 12:00Z on 2021-06-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 58 square meters per square second.19395878Sfc1 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
396 J/kg
Mixed-layer CIN
-12 J/kg
Mixed-layer LCL
545 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
58 m²/s²
0-3 km storm-relative helicity
44 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.4

Open this sounding in Storm Lab

The text

As transmitted.

574 
WHUS51 KPHI 042313
SMWPHI
ANZ452-453-472-473-050015-
/O.NEW.KPHI.MA.W.0032.210604T2313Z-210605T0015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Special Marine Warning
National Weather Service Mount Holly NJ
713 PM EDT Fri Jun 4 2021

The National Weather Service in Mount Holly NJ has issued a

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

* Until 815 PM EDT.

* At 713 PM EDT, a severe thunderstorm was located over Great Egg
  Inlet, moving east at 35 knots.

  HAZARD...Wind gusts to 40 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...
  Atlantic City, Atlantic City Reef, Buoy Ge, Great Egg Inlet,
  Brigantine, Great Egg Reef, Ocean City Reef, Deepwater Reef and Sea
  Isle City.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Move to safe harbor until hazardous weather passes.

&&

LAT...LON 3893 7380 3887 7387 3919 7477 3944 7441
      3917 7361
TIME...MOT...LOC 2313Z 292DEG 36KT 3931 7451 

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

$$

JEO

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 3, 8:14 PM EDTSevere Thunderstorm WarningPHIMiddlesex, Monmouth, Ocean19 min
Jun 3, 8:44 PM EDTSevere Thunderstorm WarningPHIBurlington, Mercer, Middlesex, Monmouth30 min
Jun 3, 8:55 PM EDTSevere Thunderstorm WarningPHIMiddlesex, Monmouth10 min
Jun 4, 1:07 PM EDTSpecial Weather StatementPHISussex38 min
Jun 4, 1:45 PM EDTAreal Flood AdvisoryPHIWarren97 min
Jun 4, 1:49 PM EDTSevere Thunderstorm WarningPHISussex, Warren41 min
Jun 4, 2:43 PM EDTSevere Thunderstorm WarningPHIHunterdon, Middlesex, Morris, Somerset, Sussex, Warren62 min
Jun 4, 2:49 PM EDTAreal Flood AdvisoryPHIHunterdon, Middlesex, Morris, Somerset, Sussex, Warren70 min
Jun 4, 3:16 PM EDTAreal Flood AdvisoryPHIBurlington, Camden, Hunterdon, Mercer, Middlesex, Monmouth and 1 more98 min
Jun 4, 3:18 PM EDTSevere Thunderstorm WarningPHIBurlington, Mercer42 min
Jun 4, 3:23 PM EDTSevere Thunderstorm WarningPHIHunterdon, Mercer, Middlesex, Somerset67 min
Jun 4, 3:46 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden, Mercer44 min
Jun 4, 4:12 PM EDTSevere Thunderstorm WarningPHIBurlington, Mercer, Middlesex, Monmouth, Ocean63 min
Jun 4, 4:20 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden, Gloucester40 min
Jun 4, 4:22 PM EDTSpecial Marine WarningPHI53 min
Jun 4, 4:23 PM EDTSevere Thunderstorm WarningPHIBurlington, Ocean52 min
Jun 4, 4:30 PM EDTAreal Flood AdvisoryPHIMiddlesex, Monmouth, Ocean63 min
Jun 4, 5:09 PM EDTSpecial Marine WarningPHI2 hr
Jun 4, 5:12 PM EDTSevere Thunderstorm WarningPHIOcean18 min
Jun 4, 5:32 PM EDTSpecial Marine WarningPHI58 min
Jun 4, 6:18 PM EDTSpecial Weather StatementPHIAtlantic42 min
Jun 4, 6:27 PM EDTSevere Thunderstorm WarningPHIAtlantic, Cape May, Cumberland48 min
Jun 4, 1:02 PM EDTSpecial Weather StatementPHILehigh28 min
Jun 4, 1:29 PM EDTAreal Flood AdvisoryPHIBerks, Lehigh2 hr
Jun 4, 2:21 PM EDTSevere Thunderstorm WarningPHIBerks, Bucks, Lehigh, Montgomery21 min
Jun 4, 2:24 PM EDTSevere Thunderstorm WarningPHIBucks, Montgomery51 min
Jun 4, 2:27 PM EDTSevere Thunderstorm WarningPHIBerks48 min
Jun 4, 3:14 PM EDTSevere Thunderstorm WarningPHIBucks, Montgomery, Philadelphia46 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.