Alert archive / New Jersey / Special Marine Warnings in 2021
Special Marine Warning 34, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this special marine warning at Jun 8, 2021, 4:54 PM EDT. It was in force for 96 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 8, 2021, 4:54 PM EDT (20:54 UTC)
- Expired
- Jun 8, 2021, 6:30 PM EDT
- In force
- 96 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), 42 km from the middle of the area, began a volume at 20:55 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, 8.9 hours before the alert went out and 139 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
- 740 J/kg
- Mixed-layer CIN
- -106 J/kg
- Mixed-layer LCL
- 1004 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- 14 m²/s²
- 0-3 km storm-relative helicity
- 9 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
251
WHUS51 KPHI 082054
SMWPHI
ANZ450-451-470-471-082230-
/O.NEW.KPHI.MA.W.0034.210608T2054Z-210608T2230Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Special Marine Warning
National Weather Service Mount Holly NJ
454 PM EDT Tue Jun 8 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 630 PM EDT.
* At 454 PM EDT, strong thunderstorms were located along a line
extending from near Manasquan Inlet to near Pine Beach, moving east
at 10 knots.
HAZARD...Wind gusts to 40 knots and small hail.
SOURCE...Radar.
IMPACT...Small craft could be damaged in briefly higher winds and
suddenly higher waves.
* Locations impacted include...
Ocean Gate, Sea Girt Reef, Barnegat Light Reef, Axel Carlson Reef,
Silverton, Forked River, Lavallette, Shark River Reef, Point
Pleasant Beach, Belmar, Seaside Park, Manasquan Inlet, Pine Beach
and Barnegat Light.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Boaters should seek safe harbor immediately until these storms pass.
Wind gusts to 40 knots, small hail, high waves, dangerous lightning,
and heavy rain are possible with these storms.
&&
LAT...LON 3964 7382 3982 7426 3990 7420 3992 7423
4019 7402 4013 7353 4007 7348
TIME...MOT...LOC 2054Z 289DEG 9KT 4013 7399 3989 7418
HAIL...<.75IN
WIND...40KTS
$$
Staarmann2 follow-up statements
539
FZUS71 KPHI 082120
MWSPHI
Marine Weather Statement
National Weather Service Mount Holly NJ
520 PM EDT Tue Jun 8 2021
ANZ450-451-470-471-082230-
/O.CON.KPHI.MA.W.0034.000000T0000Z-210608T2230Z/
520 PM EDT Tue Jun 8 2021
...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 630 PM EDT...
For the following areas...
Coastal waters from Manasquan Inlet to Little Egg Inlet NJ out 20
nm...
Coastal waters from Sandy Hook to Manasquan Inlet NJ out 20 nm...
Waters from Manasquan Inlet NJ to Little Egg Inlet NJ out 20 to 40
nm...
Waters from Sandy Hook NJ to Manasquan Inlet NJ out 20 to 40 nm...
At 519 PM EDT, severe thunderstorms producing quarter sized hail and
capable of producing waterspouts were located along a line extending
from near Sea Girt Reef to near Forked River, moving east at 10
knots.
HAZARD...Waterspouts, wind gusts to 40 knots, and large hail.
SOURCE...Marine weather spotter.
IMPACT...Waterspouts can easily overturn boats and create locally
hazardous seas. Small craft could be damaged in briefly
higher winds and suddenly higher waves. Large hail could
result in structural damage.
Locations impacted include...
Ocean Gate, Sea Girt Reef, Shark River Reef, Seaside Park, Barnegat
Light Reef, Pine Beach, Axel Carlson Reef, Silverton, Forked River,
Lavallette, Point Pleasant Beach and Barnegat Light.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Boaters should seek safe harbor immediately until these storms pass.
Wind gusts to 40 knots, large hail, high waves, dangerous lightning,
and heavy rain are possible with these storms.
Thunderstorms can produce sudden waterspouts. Waterspouts can easily
overturn boats and create locally hazardous seas. Seek safe harbor
immediately.
&&
LAT...LON 3964 7382 3982 7426 3990 7420 3992 7423
4017 7395 4013 7353 4007 7348
TIME...MOT...LOC 2119Z 289DEG 9KT 4011 7392 3987 7411
WATERSPOUT...POSSIBLE
HAIL...>.75IN
WIND...40KTS
$$
Staarmann028
FZUS71 KPHI 082149
MWSPHI
Marine Weather Statement
National Weather Service Mount Holly NJ
549 PM EDT Tue Jun 8 2021
ANZ450-470-082159-
/O.CAN.KPHI.MA.W.0034.000000T0000Z-210608T2230Z/
549 PM EDT Tue Jun 8 2021
...THE SPECIAL MARINE WARNING IS CANCELLED...
The affected areas were...
Coastal and outer waters from Sandy Hook to Manasquan Inlet NJ...
The thunderstorms have moved out of the warned area and no longer
pose a significant threat to boaters.
LAT...LON 3964 7382 3965 7384 3981 7424 3995 7413
3983 7367
TIME...MOT...LOC 2149Z 290DEG 7KT 3987 7410 3977 7417
$$
ANZ451-471-082230-
/O.CON.KPHI.MA.W.0034.000000T0000Z-210608T2230Z/
549 PM EDT Tue Jun 8 2021
...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 630 PM EDT...
For the following areas...
Coastal waters from Manasquan Inlet to Little Egg Inlet NJ out 20
nm...
Waters from Manasquan Inlet NJ to Little Egg Inlet NJ out 20 to 40
nm...
At 549 PM EDT, severe thunderstorms capable of producing waterspouts
were located along a line extending from near Seaside Park to near
Forked River, moving east at 5 knots.
HAZARD...Waterspouts, wind gusts 34 knots or greater, and small
hail.
SOURCE...Radar indicated.
IMPACT...Waterspouts can easily overturn boats and create locally
hazardous seas. Small craft could be damaged in briefly
higher winds and suddenly higher waves.
Locations impacted include...
Ocean Gate, Forked River, Seaside Park, Barnegat Light Reef and
Barnegat Light.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Move to safe harbor until hazardous weather passes.
&&
LAT...LON 3964 7382 3965 7384 3981 7424 3995 7413
3983 7367
TIME...MOT...LOC 2149Z 290DEG 7KT 3987 7410 3977 7417
WATERSPOUT...POSSIBLE
HAIL...<.75IN
WIND...>34KTS
$$
StaarmannThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 8, 1:27 PM EDT | Areal Flood Advisory | PHI | Warren | 3 hr |
| Jun 8, 1:49 PM EDT | Special Weather Statement | PHI | Warren | 26 min |
| Jun 8, 1:54 PM EDT | Areal Flood Advisory | PHI | Morris, Sussex | 95 min |
| Jun 8, 2:19 PM EDT | Areal Flood Advisory | PHI | Hunterdon, Mercer | 2 hr |
| Jun 8, 2:29 PM EDT | Special Weather Statement | PHI | Morris | 16 min |
| Jun 8, 2:48 PM EDT | Special Weather Statement | PHI | Hunterdon, Morris, Somerset | 27 min |
| Jun 8, 3:13 PM EDT | Special Weather Statement | PHI | Hunterdon, Somerset | 32 min |
| Jun 8, 3:14 PM EDT | Areal Flood Advisory | PHI | Middlesex, Somerset | 74 min |
| Jun 8, 4:12 PM EDT | Severe Thunderstorm Warning | PHI | Monmouth | 48 min |
| Jun 8, 4:14 PM EDT | Special Marine Warning | PHI | 91 min | |
| Jun 8, 4:44 PM EDT | Special Weather Statement | PHI | Salem | 31 min |
| Jun 8, 4:47 PM EDT | Severe Thunderstorm Warning | PHI | Gloucester, Salem | 43 min |
| Jun 8, 4:56 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Camden, Gloucester | 49 min |
| Jun 8, 4:58 PM EDT | Severe Thunderstorm Warning | PHI | Ocean | 47 min |
| Jun 8, 5:30 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Camden, Cumberland, Gloucester, Salem | 45 min |
| Jun 8, 5:43 PM EDT | Special Weather Statement | PHI | Ocean | 32 min |
| Jun 8, 6:01 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Ocean | 44 min |
| Jun 8, 6:22 PM EDT | Special Marine Warning | PHI | 83 min | |
| Jun 8, 7:39 PM EDT | Special Marine Warning | PHI | 66 min | |
| Jun 8, 7:52 PM EDT | Special Weather Statement | PHI | Cape May | 38 min |
| Jun 8, 11:54 AM EDT | Areal Flood Advisory | PHI | Monroe | 2 hr |
| Jun 8, 12:34 PM EDT | Flash Flood Warning | PHI | Monroe | 2 hr |
| Jun 8, 12:40 PM EDT | Special Weather Statement | PHI | Monroe | 35 min |
| Jun 8, 1:09 PM EDT | Special Weather Statement | PHI | Monroe | 21 min |
| Jun 8, 1:17 PM EDT | Special Weather Statement | PHI | Chester | 13 min |
| Jun 8, 1:18 PM EDT | Areal Flood Advisory | PHI | Chester, Delaware, Montgomery, Philadelphia | 3 hr |
| Jun 8, 1:24 PM EDT | Special Weather Statement | PHI | Delaware | 21 min |
| Jun 8, 1:35 PM EDT | Flash Flood Warning | PHI | Chester, Delaware, Montgomery | 5 hr |
| Jun 8, 2:07 PM EDT | Special Weather Statement | PHI | Bucks | 23 min |
| Jun 8, 2:43 PM EDT | Special Weather Statement | PHI | Montgomery | 32 min |
| Jun 8, 3:15 PM EDT | Special Weather Statement | PHI | Chester | 30 min |
| Jun 8, 3:21 PM EDT | Flash Flood Warning | PHI | Chester, Montgomery | 3 hr |
| Jun 8, 3:43 PM EDT | Special Weather Statement | PHI | Chester | 32 min |
| Jun 8, 4:20 PM EDT | Special Weather Statement | PHI | Chester | 25 min |
| Jun 8, 4:25 PM EDT | River Flood Warning | PHI | Chester | 11 hr |
| Jun 8, 6:21 PM EDT | Areal Flood Warning | PHI | Chester, Delaware | 15 hr |
| Jun 8, 7:14 PM EDT | River Flood Warning | PHI | Chester, Delaware | 18 hr |
| Jun 8, 7:43 PM EDT | Special Weather Statement | PHI | Sussex | 32 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.