Alert archive / New Jersey / Special Marine Warnings in 2021

Special Marine Warning 29, NWS Philadelphia/Mount Holly

June 4, 2021

NWS Philadelphia/Mount Holly issued this special marine warning at Jun 4, 2021, 4:22 PM EDT. It was in force for 53 min. 1 report 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
Jun 4, 2021, 4:22 PM EDT (20:22 UTC)
Expired
Jun 4, 2021, 5:15 PM EDT
In force
53 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Hail
0.75 in
Wind
49.0 mph

The radar

The Philadelphia radar (KDIX), 52 km from the middle of the area, began a volume at 20:22 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

TimeReportWhereRemark
Jun 4, 5:08 PM EDTHAIL 0.75Brick, NJSOCIAL MEDIA VIDEO OF HAIL UP TO PENNY SIZE. ENOUGH HAIL WAS FALLING TO COVER THE GROUND.

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, 8.4 hours before the alert went out and 117 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 2021-06-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 233 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, Brookhaven, NY at 12:00Z on 2021-06-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 30 square meters per square second.1939587897Sfc1 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
233 J/kg
Mixed-layer CIN
-50 J/kg
Mixed-layer LCL
526 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
30 m²/s²
0-3 km storm-relative helicity
95 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

292 
WHUS51 KPHI 042022
SMWPHI
ANZ450-451-470-471-042115-
/O.NEW.KPHI.MA.W.0029.210604T2022Z-210604T2115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Special Marine Warning
National Weather Service Mount Holly NJ
422 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 Sandy Hook to Little Egg Inlet NJ...

* Until 515 PM EDT.

* At 421 PM EDT, a severe thunderstorm capable of producing
  waterspouts was located over Monmouth Beach, moving southeast at 25
  knots.

  HAZARD...Waterspouts, wind gusts to nearly 50 knots, and small 
           hail.

  SOURCE...Radar.

  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, Sea Girt Reef, Atlantic Highlands, Monmouth Beach, Sea
  Bright, Axel Carlson Reef, Silverton, Fair Haven, Lavallette, Shark
  River Reef, Point Pleasant Beach, Belmar, Seaside Park, Manasquan
  Inlet, Pine Beach, Sandy Hook Reef and Leonardo.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Move to safe harbor until hazardous weather passes.

&&

LAT...LON 4044 7398 4026 7365 3994 7337 3977 7330
      3966 7331 3954 7335 3996 7425 4000 7420
      4020 7411 4024 7405 4027 7405 4031 7412
      4042 7406 4040 7398
TIME...MOT...LOC 2021Z 293DEG 26KT 4033 7399 

WATERSPOUT...POSSIBLE
HAIL...<.75IN
WIND...49KTS

$$

Davis

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, 4:23 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, 7:13 PM EDTSpecial Marine WarningPHI62 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.