Alert archive / New Jersey / Special Marine Warnings in 2021
Special Marine Warning 79, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this special marine warning at Jul 9, 2021, 2:53 AM EDT. It was in force for 68 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
- Jul 9, 2021, 2:53 AM EDT (06:53 UTC)
- Expired
- Jul 9, 2021, 4:01 AM EDT
- In force
- 68 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.0 in
- Wind
- 49.0 mph
The radar
The Philadelphia radar (KDIX), 62 km from the middle of the area, began a volume at 06:55 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 9, 3:33 AM EDT | TORNADO | Little Egg Harbor Twp, NJ | AN EF-0 TORNADO TOUCHED DOWN IN A RESIDENTIAL AREA ALONG SYCAMORE DRIVE IN LITTLE EGG HARBOR TOWNSHIP. THE TORNADO SNAPPED NUMEROUS LARGE TREE LIMBS AND SNAPPED A FEW TREES ALONG SYCAMORE DRIVE AND HARBOURTOWN BOULEVARD. ONE SMALL TREE WAS UPROOTED ON SYCAMORE |
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, 6.9 hours before the alert went out and 202 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
- 440 J/kg
- Mixed-layer CIN
- -10 J/kg
- Mixed-layer LCL
- 675 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 151 m²/s²
- 0-3 km storm-relative helicity
- 336 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 3.3
The text
As transmitted.
250
WHUS51 KPHI 090653
SMWPHI
ANZ451-452-471-472-090830-
/O.NEW.KPHI.MA.W.0079.210709T0653Z-210709T0830Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Special Marine Warning
National Weather Service Mount Holly NJ
253 AM 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 Great Egg Inlet
NJ...
* Until 430 AM EDT.
* At 253 AM EDT, severe thunderstorms capable of producing
waterspouts were located along a line extending from Atlantic City
to 27 nm east of Deepwater Reef, moving northeast at 30 knots.
HAZARD...Waterspouts and wind gusts to nearly 50 knots.
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...
Atlantic City, Little Egg Reef, Atlantic City Reef, Ship Bottom,
Great Egg Inlet, Garden State South Reef, Great Egg Reef, Beach
Haven, North Beach Haven, Garden State North Reef, Little Egg
Inlet, Brigantine and Harvey Cedars.
LAT...LON 3930 7348 3902 7370 3932 7466 3944 7455
3947 7450 3949 7451 3960 7440 3970 7426
3972 7425 3946 7339
TIME...MOT...LOC 0653Z 224DEG 32KT 3936 7446 3908 7361
WATERSPOUT...POSSIBLE
HAIL...0.00IN
WIND...49KTS
$$
BAH2 follow-up statements
315
FZUS71 KPHI 090731
MWSPHI
Marine Weather Statement
National Weather Service Mount Holly NJ
331 AM EDT Fri Jul 9 2021
ANZ451-452-471-472-090830-
/O.CON.KPHI.MA.W.0079.000000T0000Z-210709T0830Z/
331 AM EDT Fri Jul 9 2021
...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 430 AM EDT...
For the following areas...
Coastal waters from Little Egg Inlet to Great Egg Inlet NJ out 20
nm...
Coastal waters from Manasquan Inlet to Little Egg Inlet NJ out 20
nm...
Waters from Little Egg Inlet NJ to Great Egg Inlet NJ out 20 to 40 nm
from 20 to 40 NM...
Waters from Manasquan Inlet NJ to Little Egg Inlet NJ out 20 to 40
nm...
At 330 AM EDT, severe thunderstorms capable of producing waterspouts
were located along a line extending from North Beach Haven to 38 nm
southeast of Garden State North Reef, moving northeast at 30 knots.
HAZARD...Waterspouts and wind gusts to nearly 50 knots.
SOURCE...Radar indicated.
IMPACT...Waterspouts can easily overturn boats and create locally
hazardous seas. Small craft could be damaged in briefly
higher winds and suddenly higher waves.
Locations impacted include...
Beach Haven, North Beach Haven, Garden State North Reef, Little Egg
Reef, Little Egg Inlet, Ship Bottom, Garden State South Reef, Harvey
Cedars and Brigantine.
LAT...LON 3936 7344 3922 7355 3949 7451 3960 7440
3970 7426 3972 7425 3946 7339
TIME...MOT...LOC 0730Z 224DEG 32KT 3959 7418 3931 7333
WATERSPOUT...POSSIBLE
HAIL...0.00IN
WIND...49KTS
$$
BAH339
FZUS71 KPHI 090801
MWSPHI
Marine Weather Statement
National Weather Service Mount Holly NJ
401 AM EDT Fri Jul 9 2021
ANZ451-452-471-472-090810-
/O.CAN.KPHI.MA.W.0079.000000T0000Z-210709T0830Z/
401 AM EDT Fri Jul 9 2021
...THE SPECIAL MARINE WARNING IS CANCELLED...
The affected areas were...
Coastal and outer waters from Manasquan Inlet to Great Egg Inlet
NJ...
The thunderstorms have moved out of the area and no longer pose a
significant threat to boaters.
LAT...LON 3936 7344 3922 7355 3949 7451 3960 7440
3970 7426 3972 7425 3946 7339
TIME...MOT...LOC 0800Z 224DEG 32KT 3978 7394 3950 7309
$$
BAHThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 8, 10:25 PM EDT | Areal Flood Advisory | PHI | Cape May, Cumberland | 7 hr |
| Jul 8, 11:02 PM EDT | Special Marine Warning | PHI | 88 min | |
| Jul 8, 11:59 PM EDT | Areal Flood Advisory | PHI | Salem | 5 hr |
| Jul 9, 12:07 AM EDT | Special Marine Warning | PHI | 53 min | |
| Jul 9, 12:08 AM EDT | Areal Flood Advisory | PHI | Atlantic, Camden, Gloucester | 6 hr |
| Jul 9, 12:25 AM EDT | Special Marine Warning | PHI | 95 min | |
| Jul 9, 1:34 AM EDT | Special Marine Warning | PHI | 86 min | |
| Jul 9, 1:49 AM EDT | Special Marine Warning | PHI | 26 min | |
| Jul 9, 2:05 AM EDT | Areal Flood Advisory | PHI | Burlington, Monmouth, Ocean | 8 hr |
| Jul 9, 2:50 AM EDT | Tornado Warning | PHI | Atlantic, Cape May, Cumberland | 25 min |
| Jul 9, 3:38 AM EDT | Tornado Warning | PHI | Atlantic, Burlington, Ocean | 18 min |
| Jul 9, 3:51 AM EDT | Special Marine Warning | PHI | 84 min | |
| Jul 9, 4:08 AM EDT | Gale Warning | PHI | 3 hr | |
| Jul 9, 4:41 AM EDT | Tornado Warning | PHI | Monmouth, Ocean | 34 min |
| Jul 9, 4:44 AM EDT | Areal Flood Advisory | PHI | Mercer, Middlesex | 5 hr |
| Jul 9, 4:54 AM EDT | Areal Flood Advisory | PHI | Morris, Somerset | 5 hr |
| Jul 9, 4:58 AM EDT | Special Marine Warning | PHI | 39 min | |
| Jul 9, 5:34 PM EDT | Areal Flood Advisory | PHI | Sussex, Warren | 2 hr |
| Jul 9, 6:19 PM EDT | Severe Thunderstorm Warning | PHI | Salem | 41 min |
| Jul 9, 6:24 PM EDT | Special Marine Warning | PHI | 66 min | |
| Jul 9, 6:50 PM EDT | Areal Flood Advisory | PHI | Gloucester, Salem | 2 hr |
| Jul 9, 6:57 PM EDT | Severe Thunderstorm Warning | PHI | Cumberland, Gloucester, Salem | 63 min |
| Jul 9, 7:17 PM EDT | Severe Thunderstorm Warning | PHI | Camden, Gloucester | 23 min |
| Jul 9, 7:39 PM EDT | Areal Flood Advisory | PHI | Hunterdon, Morris, Sussex, Warren | 2 hr |
| Jul 9, 7:43 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Camden, Cape May, Cumberland, Gloucester, Salem | 62 min |
| Jul 9, 7:46 PM EDT | Areal Flood Advisory | PHI | Atlantic, Camden, Cumberland, Gloucester, Salem | 108 min |
| Jul 9, 5:17 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 43 min |
| Jul 9, 6:55 PM EDT | Special Weather Statement | PHI | Carbon | 35 min |
| Jul 9, 7:07 PM EDT | Areal Flood Advisory | PHI | Carbon, Lehigh, Monroe, Northampton | 3 hr |
| Jul 9, 7:31 PM EDT | Special Weather Statement | PHI | Northampton | 29 min |
| Jul 8, 10:19 PM EDT | Areal Flood Advisory | PHI | Kent, Sussex | 5 hr |
| Jul 8, 11:37 PM EDT | Tornado Warning | PHI | Sussex | 23 min |
| Jul 8, 11:59 PM EDT | Tornado Warning | PHI | Sussex | 12 min |
| Jul 9, 12:04 AM EDT | Tornado Warning | PHI | Sussex | 26 min |
| Jul 9, 12:11 AM EDT | Tornado Warning | PHI | Sussex | 35 min |
| Jul 9, 12:28 AM EDT | Tornado Warning | PHI | Sussex | 17 min |
| Jul 9, 4:54 PM EDT | Special Weather Statement | PHI | New Castle | 66 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.