Alert archive / New Jersey / Special Marine Warnings in 2021
Special Marine Warning 87, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this special marine warning at Jul 14, 2021, 7:03 PM EDT. It was in force for 61 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
- Jul 14, 2021, 7:03 PM EDT (23:03 UTC)
- Expired
- Jul 14, 2021, 8:04 PM EDT
- In force
- 61 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.0 in
- Wind
- 34.0 mph
The radar
The Philadelphia radar (KDIX), 49 km from the middle of the area, began a volume at 23:03 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
Brookhaven, NY (KOKX), launched 12:00Z, 11.1 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.
- Mixed-layer CAPE
- 1588 J/kg
- Mixed-layer CIN
- -86 J/kg
- Mixed-layer LCL
- 506 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 39 m²/s²
- 0-3 km storm-relative helicity
- 86 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.4
The text
As transmitted.
863
WHUS51 KPHI 142303
SMWPHI
ANZ450-150030-
/O.NEW.KPHI.MA.W.0087.210714T2303Z-210715T0030Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Special Marine Warning
National Weather Service Mount Holly NJ
703 PM EDT Wed Jul 14 2021
The National Weather Service in Mount Holly NJ has issued a
* Special Marine Warning for...
Coastal waters from Sandy Hook to Manasquan Inlet NJ out 20 nm...
* Until 830 PM EDT.
* At 702 PM EDT, strong thunderstorms were located along a line
extending from Sandy Hook Bay to 7 nm west of Belmar, moving east
at 15 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...
Sea Girt Reef, Leonardo, Shark River Reef, Belmar, Atlantic
Highlands, Monmouth Beach, Sea Bright, Sandy Hook Reef, Fair Haven,
Manasquan Inlet and Point Pleasant Beach.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Frequent lightning is occurring with these storms. If caught on the
open water, stay below deck if possible and keep away from ungrounded
metal objects.
&&
LAT...LON 4025 7364 4014 7367 4001 7374 4010 7402
4011 7409 4012 7410 4012 7411 4020 7411
4024 7405 4027 7405 4032 7413 4035 7414
4042 7406 4040 7398 4044 7398
TIME...MOT...LOC 2302Z 290DEG 16KT 4044 7405 4023 7418
HAIL...0.00IN
WIND...>34KTS
$$
CMS1 follow-up statement
843
FZUS71 KPHI 150004
MWSPHI
Marine Weather Statement
National Weather Service Mount Holly NJ
804 PM EDT Wed Jul 14 2021
ANZ450-150014-
/O.CAN.KPHI.MA.W.0087.000000T0000Z-210715T0030Z/
804 PM EDT Wed Jul 14 2021
...THE SPECIAL MARINE WARNING IS CANCELLED...
The affected areas were...
Coastal waters from Sandy Hook to Manasquan Inlet NJ out 20 nm...
The thunderstorms have weakened and no longer pose a significant
threat to boaters.
LAT...LON 4025 7364 4014 7367 4001 7374 4010 7402
4011 7409 4012 7410 4012 7411 4020 7411
4024 7405 4027 7405 4032 7413 4035 7414
4042 7406 4040 7398 4044 7398
TIME...MOT...LOC 0002Z 290DEG 16KT 4035 7372 4014 7385
$$
CMSThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 14, 3:42 PM EDT | Special Weather Statement | PHI | Morris | 18 min |
| Jul 14, 5:47 PM EDT | Special Marine Warning | PHI | 43 min | |
| Jul 14, 5:54 PM EDT | Special Weather Statement | PHI | Ocean | 51 min |
| Jul 14, 6:41 PM EDT | Special Weather Statement | PHI | Monmouth | 34 min |
| Jul 14, 7:03 PM EDT | Severe Thunderstorm Warning | PHI | Monmouth | 42 min |
| Jul 14, 7:24 PM EDT | Severe Thunderstorm Warning | PHI | Middlesex, Monmouth | 36 min |
| Jul 14, 7:26 PM EDT | Areal Flood Advisory | PHI | Middlesex, Monmouth | 2 hr |
| Jul 14, 7:37 PM EDT | Flash Flood Warning | PHI | Monmouth | 3 hr |
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.