Alert archive / New Jersey / Special Marine Warnings in 2021
Special Marine Warning 83, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this special marine warning at Jul 9, 2021, 8:28 PM EDT. It was in force for 2 hr. 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
- Jul 9, 2021, 8:28 PM EDT (00:28 UTC)
- Expired
- Jul 9, 2021, 10:30 PM EDT
- In force
- 2 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 49.0 mph
The radar
The Philadelphia radar (KDIX), 62 km from the middle of the area, began a volume at 00:30 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
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 9, 9:25 PM EDT | MARINE TSTM WIND 39 | 3 Sw Beach Haven, NJ | MEASURED NEAR MCKINLEY AVENUE, IN SOUTH BEACH HAVEN. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 00:00Z, 0.5 hours before the alert went out and 185 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
- 661 J/kg
- Mixed-layer CIN
- -57 J/kg
- Mixed-layer LCL
- 1158 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 74 m²/s²
- 0-3 km storm-relative helicity
- 103 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.9
The text
As transmitted.
597
WHUS51 KPHI 100028
SMWPHI
ANZ451>453-471>473-100230-
/O.NEW.KPHI.MA.W.0083.210710T0028Z-210710T0230Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Special Marine Warning
National Weather Service Mount Holly NJ
828 PM EDT Fri Jul 9 2021
The National Weather Service in Mount Holly NJ has issued a
* Special Marine Warning for...
Coastal and outer waters from Manasquan Inlet to Cape May NJ...
* Until 1030 PM EDT.
* At 828 PM EDT, strong thunderstorms were located along a line
extending from 19 nm northwest of Brigantine to 11 nm northwest of
Atlantic City to 7 nm northwest of Buoy Ge, moving east at 25
knots.
HAZARD...Wind gusts to nearly 50 knots and small hail.
SOURCE...Radar.
IMPACT...Small craft could be damaged in briefly higher winds and
suddenly higher waves.
* Locations impacted include...
Atlantic City, Little Egg Reef, Atlantic City Reef, Ship Bottom,
Great Egg Inlet, Garden State South Reef, Great Egg Reef, Ocean
City Reef, Beach Haven, North Beach Haven, Garden State North Reef,
Little Egg Inlet, Buoy Ge, Brigantine and Sea Isle City.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Move to safe harbor until hazardous weather passes.
&&
LAT...LON 3930 7348 3900 7372 3889 7385 3921 7477
3925 7478 3931 7485 3935 7478 3941 7478
3949 7473 3944 7465 3938 7466 3938 7464
3947 7450 3956 7459 3960 7459 3962 7455
3960 7439 3966 7431 3962 7332
TIME...MOT...LOC 0028Z 282DEG 25KT 3961 7472 3949 7465 3937 7472
HAIL...<.75IN
WIND...49KTS
$$
Staarmann3 follow-up statements
903
FZUS71 KPHI 100102
MWSPHI
Marine Weather Statement
National Weather Service Mount Holly NJ
902 PM EDT Fri Jul 9 2021
ANZ451>453-471>473-100230-
/O.CON.KPHI.MA.W.0083.000000T0000Z-210710T0230Z/
902 PM EDT Fri Jul 9 2021
...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 1030 PM EDT...
For the following areas...
Coastal waters from Great Egg Inlet to Cape May NJ out 20 nm...
Coastal waters from Little Egg Inlet to Great Egg Inlet NJ out 20
nm...
Coastal waters from Manasquan Inlet to Little Egg Inlet NJ out 20
nm...
Waters from Great Egg Inlet NJ to Cape May NJ out 20 to 40 nm...
Waters from Little Egg Inlet NJ to Great Egg Inlet NJ out 20 to 40 nm
from 20 to 40 NM...
Waters from Manasquan Inlet NJ to Little Egg Inlet NJ out 20 to 40
nm...
At 902 PM EDT, strong thunderstorms were located along a line
extending from Little Egg Inlet to near Atlantic City to near Buoy
Ge, moving east at 20 knots.
HAZARD...Wind gusts to 40 knots and small hail.
SOURCE...Radar indicated.
IMPACT...Small craft could be damaged in briefly higher winds and
suddenly higher waves.
Locations impacted include...
Atlantic City, Little Egg Reef, Atlantic City Reef, Ship Bottom,
Great Egg Inlet, Garden State South Reef, Great Egg Reef, Ocean City
Reef, Beach Haven, North Beach Haven, Garden State North Reef, Little
Egg Inlet, Buoy Ge, Brigantine and Sea Isle City.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Move to safe harbor until hazardous weather passes.
&&
LAT...LON 3930 7348 3900 7372 3889 7385 3921 7477
3925 7478 3931 7485 3935 7478 3941 7478
3949 7473 3944 7465 3938 7466 3938 7464
3947 7450 3956 7459 3960 7459 3962 7455
3960 7439 3966 7431 3962 7332
TIME...MOT...LOC 0102Z 276DEG 21KT 3950 7436 3936 7441 3927 7458
HAIL...<.75IN
WIND...40KTS
$$
Staarmann187
FZUS71 KPHI 100123
MWSPHI
Marine Weather Statement
National Weather Service Mount Holly NJ
923 PM EDT Fri Jul 9 2021
ANZ451>453-471>473-100230-
/O.CON.KPHI.MA.W.0083.000000T0000Z-210710T0230Z/
923 PM EDT Fri Jul 9 2021
...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 1030 PM EDT...
For the following areas...
Coastal waters from Great Egg Inlet to Cape May NJ out 20 nm...
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...
Waters from Great Egg Inlet NJ to Cape May NJ out 20 to 40 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...
At 923 PM EDT, strong thunderstorms were located along a line
extending from near Little Egg Reef to near Atlantic City Reef to
near Great Egg Inlet, moving east at 15 knots.
HAZARD...Wind gusts 34 knots or greater and small hail.
SOURCE...Radar indicated.
IMPACT...Small craft could be damaged in briefly higher winds and
suddenly higher waves.
Locations impacted include...
Atlantic City, Little Egg Reef, Atlantic City Reef, Great Egg Inlet,
Garden State South Reef, Great Egg Reef, Ocean City Reef, Beach
Haven, North Beach Haven, Little Egg Inlet, Buoy Ge, Brigantine and
Sea Isle City.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Move to safe harbor until hazardous weather passes.
&&
LAT...LON 3927 7351 3900 7372 3889 7385 3921 7477
3925 7478 3931 7485 3935 7478 3937 7462
3952 7437 3960 7429 3962 7332
TIME...MOT...LOC 0123Z 275DEG 16KT 3947 7425 3933 7430 3926 7456
HAIL...<.75IN
WIND...>34KTS
$$
Staarmann323
FZUS71 KPHI 100201
MWSPHI
Marine Weather Statement
National Weather Service Mount Holly NJ
1001 PM EDT Fri Jul 9 2021
ANZ451-100211-
/O.CAN.KPHI.MA.W.0083.000000T0000Z-210710T0230Z/
1001 PM EDT Fri Jul 9 2021
...THE SPECIAL MARINE WARNING IS CANCELLED...
The affected areas were...
Coastal waters from Manasquan Inlet to Little Egg Inlet NJ out 20
nm...
The thunderstorms have moved out of the warned area and no longer
pose a significant threat to boaters.
LAT...LON 3915 7459 3926 7441 3939 7420 3935 7346
3927 7351 3900 7372 3889 7385
TIME...MOT...LOC 0201Z 273DEG 22KT 3930 7414 3918 7423 3915 7444
$$
ANZ452-453-471>473-100230-
/O.CON.KPHI.MA.W.0083.000000T0000Z-210710T0230Z/
1001 PM EDT Fri Jul 9 2021
...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 1030 PM EDT...
For the following areas...
Coastal waters from Great Egg Inlet to Cape May NJ out 20 nm...
Coastal waters from Little Egg Inlet to Great Egg Inlet NJ out 20
nm...
Waters from Great Egg Inlet NJ to Cape May NJ out 20 to 40 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...
At 1001 PM EDT, strong thunderstorms were located along a line
extending from 10 nm east of Great Egg Reef to near Atlantic City
Reef to near Ocean City Reef, moving east at 20 knots.
HAZARD...Wind gusts 34 knots or greater and small hail.
SOURCE...Radar indicated.
IMPACT...Small craft could be damaged in briefly higher winds and
suddenly higher waves.
Locations impacted include...
Great Egg Reef and Atlantic City Reef.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Move to safe harbor until hazardous weather passes.
&&
LAT...LON 3915 7459 3926 7441 3939 7420 3935 7346
3927 7351 3900 7372 3889 7385
TIME...MOT...LOC 0201Z 273DEG 22KT 3930 7414 3918 7423 3915 7444
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 |
|---|---|---|---|---|
| Jul 9, 8:09 PM EDT | Special Weather Statement | PHI | Morris, Warren | 66 min |
| Jul 9, 8:25 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Ocean | 65 min |
| Jul 9, 9:12 PM EDT | Areal Flood Advisory | PHI | Morris, Sussex | 2 hr |
| Jul 9, 8:34 PM EDT | Special Weather Statement | PHI | Sussex | 26 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.