Alert archive / New Jersey / Special Marine Warnings in 2021
Special Marine Warning 135, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this special marine warning at Sep 9, 2021, 12:41 AM EDT. It was in force for 52 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
- Sep 9, 2021, 12:41 AM EDT (04:41 UTC)
- Expired
- Sep 9, 2021, 1:33 AM EDT
- In force
- 52 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), 66 km from the middle of the area, began a volume at 04:40 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 00:00Z, 4.7 hours before the alert went out and 125 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
- 619 J/kg
- Mixed-layer CIN
- -36 J/kg
- Mixed-layer LCL
- 807 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 211 m²/s²
- 0-3 km storm-relative helicity
- 225 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 3.4
The text
As transmitted.
470
WHUS51 KPHI 090441
SMWPHI
ANZ450-451-470-471-090545-
/O.NEW.KPHI.MA.W.0135.210909T0441Z-210909T0545Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Special Marine Warning
National Weather Service Mount Holly NJ
1241 AM EDT Thu Sep 9 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 145 AM EDT.
* At 1241 AM EDT, a strong thunderstorm was located over Barnegat
Light Reef, moving east at 20 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...
Barnegat Light Reef.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Move to safe harbor until hazardous weather passes.
&&
LAT...LON 3987 7336 3972 7403 3988 7412 4011 7352
4002 7344
TIME...MOT...LOC 0441Z 248DEG 22KT 3983 7399
HAIL...<.75IN
WIND...40KTS
$$
SFJ3 follow-up statements
011
FZUS71 KPHI 090454
MWSPHI
Marine Weather Statement
National Weather Service Mount Holly NJ
1254 AM EDT Thu Sep 9 2021
ANZ450-451-470-471-090545-
/O.CON.KPHI.MA.W.0135.000000T0000Z-210909T0545Z/
1254 AM EDT Thu Sep 9 2021
...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 145 AM EDT...
For the following areas...
Coastal waters from Manasquan Inlet to Little Egg Inlet NJ out 20
nm...
Coastal waters from Sandy Hook to Manasquan Inlet NJ out 20 nm...
Waters from Manasquan Inlet NJ to Little Egg Inlet NJ out 20 to 40
nm...
Waters from Sandy Hook NJ to Manasquan Inlet NJ out 20 to 40 nm...
At 1254 AM EDT, a strong thunderstorm was located 10 nm northeast of
Barnegat Light Reef, moving northeast at 30 knots.
HAZARD...Wind gusts to 40 knots and small hail.
SOURCE...Radar indicated.
IMPACT...Small craft could be damaged in briefly higher winds and
suddenly higher waves.
The strong thunderstorm will remain over mainly open waters.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Move to safe harbor until hazardous weather passes.
&&
LAT...LON 3987 7336 3980 7388 3993 7399 4011 7352
4002 7344
TIME...MOT...LOC 0454Z 245DEG 32KT 3989 7383
HAIL...<.75IN
WIND...40KTS
$$
SFJ175
FZUS71 KPHI 090514
MWSPHI
Marine Weather Statement
National Weather Service Mount Holly NJ
114 AM EDT Thu Sep 9 2021
ANZ451-090524-
/O.CAN.KPHI.MA.W.0135.000000T0000Z-210909T0545Z/
114 AM EDT Thu Sep 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 thunderstorm has moved out of the warned area and no longer
poses a significant threat to boaters.
LAT...LON 3987 7336 3984 7359 3997 7372 3998 7370
4001 7371 4002 7376 4011 7352 4002 7344
TIME...MOT...LOC 0514Z 247DEG 35KT 3997 7359
$$
ANZ450-470-471-090545-
/O.CON.KPHI.MA.W.0135.000000T0000Z-210909T0545Z/
114 AM EDT Thu Sep 9 2021
...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 145 AM EDT...
For the following areas...
Coastal waters from Sandy Hook to Manasquan Inlet NJ out 20 nm...
Waters from Manasquan Inlet NJ to Little Egg Inlet NJ out 20 to 40
nm...
Waters from Sandy Hook NJ to Manasquan Inlet NJ out 20 to 40 nm...
At 114 AM EDT, a strong thunderstorm was located 10 nm southeast of
Shark River Reef, moving northeast at 35 knots.
HAZARD...Wind gusts 34 knots or greater and small hail.
SOURCE...Radar indicated.
IMPACT...Small craft could be damaged in briefly higher winds and
suddenly higher waves.
The strong thunderstorm will remain over mainly open waters.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Move to safe harbor until hazardous weather passes.
&&
LAT...LON 3987 7336 3984 7359 3997 7372 3998 7370
4001 7371 4002 7376 4011 7352 4002 7344
TIME...MOT...LOC 0514Z 247DEG 35KT 3997 7359
HAIL...<.75IN
WIND...>34KTS
$$
SFJ850
FZUS71 KPHI 090533
MWSPHI
Marine Weather Statement
National Weather Service Mount Holly NJ
133 AM EDT Thu Sep 9 2021
ANZ450-470-471-090543-
/O.CAN.KPHI.MA.W.0135.000000T0000Z-210909T0545Z/
133 AM EDT Thu Sep 9 2021
...THE SPECIAL MARINE WARNING IS CANCELLED...
The affected areas were...
Coastal waters from Sandy Hook to Manasquan Inlet NJ out 20 nm...
Outer waters from Sandy Hook to Little Egg Inlet NJ out 20 to 40
nm...
The thunderstorm has moved out of the area.
LAT...LON 3987 7336 3984 7359 3997 7372 3998 7370
4001 7371 4002 7376 4011 7352 4002 7344
TIME...MOT...LOC 0532Z 248DEG 22KT 4001 7345
$$
SFJThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 8, 9:16 PM EDT | Areal Flood Advisory | PHI | Warren | 3 hr |
| Sep 8, 9:16 PM EDT | Special Weather Statement | PHI | Sussex, Warren | 29 min |
| Sep 8, 9:43 PM EDT | Special Weather Statement | PHI | Sussex, Warren | 47 min |
| Sep 8, 10:42 PM EDT | Flash Flood Warning | PHI | Warren | 6 hr |
| Sep 8, 10:56 PM EDT | Special Weather Statement | PHI | Warren | 34 min |
| Sep 8, 11:27 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Warren | 48 min |
| Sep 8, 11:30 PM EDT | Areal Flood Advisory | PHI | Morris, Sussex | 4 hr |
| Sep 9, 12:07 AM EDT | Special Weather Statement | PHI | Hunterdon, Somerset, Warren | 23 min |
| Sep 9, 12:18 AM EDT | Special Marine Warning | PHI | 57 min | |
| Sep 9, 12:30 AM EDT | Special Weather Statement | PHI | Morris | 30 min |
| Sep 9, 2:17 AM EDT | Special Weather Statement | PHI | Ocean | 28 min |
| Sep 9, 2:46 AM EDT | Special Weather Statement | PHI | Atlantic | 29 min |
| Sep 9, 3:14 AM EDT | Special Weather Statement | PHI | Atlantic | 31 min |
| Sep 9, 3:30 AM EDT | Areal Flood Advisory | PHI | Atlantic, Burlington, Cape May, Cumberland | 112 min |
| Sep 9, 4:28 AM EDT | Areal Flood Warning | PHI | Warren | 4 hr |
| Sep 8, 8:47 PM EDT | Special Weather Statement | PHI | Northampton | 28 min |
| Sep 8, 9:12 PM EDT | Special Weather Statement | PHI | Lehigh | 48 min |
| Sep 8, 9:38 PM EDT | Special Weather Statement | PHI | Berks | 52 min |
| Sep 8, 9:46 PM EDT | Special Weather Statement | PHI | Lehigh, Northampton | 44 min |
| Sep 8, 9:48 PM EDT | Flash Flood Warning | PHI | Lehigh, Northampton | 7 hr |
| Sep 8, 9:59 PM EDT | Areal Flood Advisory | PHI | Berks | 3 hr |
| Sep 8, 10:11 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 49 min |
| Sep 8, 10:23 PM EDT | Tornado Warning | PHI | Berks | 22 min |
| Sep 8, 10:27 PM EDT | Special Weather Statement | PHI | Northampton | 33 min |
| Sep 8, 10:47 PM EDT | Areal Flood Advisory | PHI | Carbon, Monroe | 3 hr |
| Sep 8, 10:47 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Lehigh, Montgomery, Northampton | 58 min |
| Sep 8, 11:35 PM EDT | Special Weather Statement | PHI | Chester, Delaware, Montgomery | 40 min |
| Sep 9, 12:08 AM EDT | Special Weather Statement | PHI | Bucks, Delaware, Montgomery, Philadelphia | 37 min |
| Sep 9, 4:26 AM EDT | Areal Flood Warning | PHI | Lehigh, Northampton | 3 hr |
| Sep 9, 12:58 AM EDT | Special Weather Statement | PHI | New Castle | 32 min |
| Sep 9, 1:12 AM EDT | Areal Flood Advisory | PHI | New Castle | 62 min |
| Sep 9, 5:37 AM EDT | Areal Flood Advisory | PHI | Kent, New Castle, Sussex | 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.