Alert archive / New Jersey / Special Marine Warnings in 2021
Special Marine Warning 121, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this special marine warning at Aug 23, 2021, 4:50 PM EDT. It was in force for 55 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
- Aug 23, 2021, 4:50 PM EDT (20:50 UTC)
- Expired
- Aug 23, 2021, 5:45 PM EDT
- In force
- 55 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), 60 km from the middle of the area, began a volume at 20:54 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, 8.8 hours before the alert went out and 189 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
- 150 J/kg
- Mixed-layer CIN
- -15 J/kg
- Mixed-layer LCL
- 711 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 98 m²/s²
- 0-3 km storm-relative helicity
- 108 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.7
The text
As transmitted.
554
WHUS51 KPHI 232050
SMWPHI
ANZ451-452-232145-
/O.NEW.KPHI.MA.W.0121.210823T2050Z-210823T2145Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Special Marine Warning
National Weather Service Mount Holly NJ
450 PM EDT Mon Aug 23 2021
The National Weather Service in Mount Holly NJ has issued a
* Special Marine Warning for...
Coastal waters from Manasquan Inlet to Great Egg Inlet NJ out 20
nm...
* Until 545 PM EDT.
* At 450 PM EDT, strong thunderstorms were located along a line
extending from Garden State South Reef to near Little Egg Inlet to
13 nm west of Beach Haven, moving southeast at 20 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...
Beach Haven, North Beach Haven, Little Egg Reef, Atlantic City
Reef, Little Egg Inlet, Brigantine, Garden State South Reef and
Atlantic City.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Move to safe harbor until hazardous weather passes.
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 3943 7390 3919 7410 3934 7443 3957 7452
3963 7410 3960 7382
TIME...MOT...LOC 2050Z 309DEG 19KT 3956 7415 3955 7435 3961 7453
HAIL...0.00IN
WIND...>34KTS
$$
Gorse2 follow-up statements
134
FZUS71 KPHI 232108
MWSPHI
Marine Weather Statement
National Weather Service Mount Holly NJ
508 PM EDT Mon Aug 23 2021
ANZ451-452-232145-
/O.CON.KPHI.MA.W.0121.000000T0000Z-210823T2145Z/
508 PM EDT Mon Aug 23 2021
...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 545 PM EDT...
For the following areas...
Coastal waters from Little Egg Inlet to Great Egg Inlet NJ out 20
nm...
Coastal waters from Manasquan Inlet to Little Egg Inlet NJ out 20
nm...
At 507 PM EDT, strong thunderstorms were located along a line
extending from near Garden State South Reef to near Little Egg Reef
to 6 nm west of Little Egg Inlet, moving southeast at 25 knots.
HAZARD...Wind gusts 34 knots or greater.
SOURCE...Radar indicated.
IMPACT...Small craft could be damaged in briefly higher winds and
suddenly higher waves.
Locations impacted include...
Beach Haven, Little Egg Reef, Atlantic City Reef, Little Egg Inlet,
Brigantine, Garden State South Reef, Atlantic City and North Beach
Haven.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Move to safe harbor until hazardous weather passes.
Frequent lightning is occurring with these storms. If caught on the
open water, stay below deck if possible and keep away from ungrounded
metal objects.
&&
LAT...LON 3945 7389 3919 7410 3934 7443 3957 7452
3960 7382
TIME...MOT...LOC 2107Z 311DEG 23KT 3949 7406 3948 7426 3954 7444
HAIL...0.00IN
WIND...>34KTS
$$
Gorse124
FZUS71 KPHI 232124
MWSPHI
Marine Weather Statement
National Weather Service Mount Holly NJ
524 PM EDT Mon Aug 23 2021
ANZ451-452-232145-
/O.CON.KPHI.MA.W.0121.000000T0000Z-210823T2145Z/
524 PM EDT Mon Aug 23 2021
...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 545 PM 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...
At 523 PM EDT, strong thunderstorms were located along a line
extending from 10 nm southeast of Garden State South Reef to near
Little Egg Reef to near Little Egg Inlet, moving southeast at 20
knots.
HAZARD...Wind gusts to 40 knots.
SOURCE...Radar indicated.
IMPACT...Small craft could be damaged in briefly higher winds and
suddenly higher waves.
Locations impacted include...
Little Egg Reef, Atlantic City Reef, Little Egg Inlet, Brigantine and
Atlantic City.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Move to safe harbor until hazardous weather passes.
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 3946 7388 3919 7410 3934 7443 3951 7437
3954 7385
TIME...MOT...LOC 2123Z 311DEG 19KT 3942 7399 3941 7419 3947 7437
HAIL...0.00IN
WIND...40KTS
$$
GorseThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 22, 8:11 PM EDT | Areal Flood Advisory | PHI | Warren | 6 hr |
| Aug 22, 8:47 PM EDT | Flash Flood Warning | PHI | Sussex, Warren | 6 hr |
| Aug 22, 11:27 PM EDT | Areal Flood Warning | PHI | Middlesex | 29 hr |
| Aug 23, 2:09 AM EDT | River Flood Warning | PHI | Morris, Passaic | 17 hr |
| Aug 23, 3:25 AM EDT | Areal Flood Warning | PHI | Morris | 8 hr |
| Aug 23, 4:10 AM EDT | River Flood Warning | PHI | Morris | 41 hr |
| Aug 23, 5:07 AM EDT | Areal Flood Warning | PHI | Warren | 21 hr |
| Aug 23, 5:22 AM EDT | Areal Flood Warning | PHI | Somerset | 9 hr |
| Aug 23, 5:44 AM EDT | Areal Flood Warning | PHI | Hunterdon | 7 hr |
| Aug 23, 7:20 AM EDT | River Flood Warning | PHI | Hunterdon, Somerset | 7 hr |
| Aug 23, 7:47 AM EDT | River Flood Warning | PHI | Morris, Passaic | 13 hr |
| Aug 23, 8:36 AM EDT | Areal Flood Warning | PHI | Somerset | 9 hr |
| Aug 23, 8:42 AM EDT | River Flood Warning | PHI | Middlesex, Somerset | 21 hr |
| Aug 23, 11:22 AM EDT | River Flood Warning | PHI | Middlesex, Somerset | 16 hr |
| Aug 23, 11:32 AM EDT | River Flood Warning | PHI | Essex, Morris, Passaic | 5 days |
| Aug 23, 11:58 AM EDT | River Flood Warning | PHI | Somerset | 15 hr |
| Aug 23, 12:19 PM EDT | River Flood Warning | PHI | Burlington | 33 hr |
| Aug 23, 12:51 PM EDT | Coastal Flood Statement | PHI | Ocean | 3 hr |
| Aug 23, 2:26 PM EDT | Areal Flood Warning | PHI | Sussex | 14 hr |
| Aug 23, 2:26 PM EDT | Special Weather Statement | PHI | Ocean | 49 min |
| Aug 23, 3:12 PM EDT | Special Weather Statement | PHI | Ocean | 33 min |
| Aug 23, 3:15 PM EDT | Severe Thunderstorm Warning | PHI | Ocean | 45 min |
| Aug 23, 3:18 PM EDT | Special Marine Warning | PHI | 57 min | |
| Aug 23, 3:38 PM EDT | River Flood Warning | PHI | Essex, Morris, Passaic | 48 hr |
| Aug 23, 4:47 PM EDT | Special Weather Statement | PHI | Atlantic | 28 min |
| Aug 23, 5:13 PM EDT | Special Weather Statement | PHI | Camden | 32 min |
| Aug 23, 5:39 PM EDT | Special Marine Warning | PHI | 33 min | |
| Aug 23, 6:46 PM EDT | Special Marine Warning | PHI | 64 min | |
| Aug 22, 10:34 PM EDT | Areal Flood Advisory | PHI | Carbon, Lehigh, Northampton | 3 hr |
| Aug 22, 10:53 PM EDT | Flash Flood Warning | PHI | Carbon, Lehigh, Monroe, Montgomery, Northampton | 4 hr |
| Aug 22, 11:42 PM EDT | Areal Flood Advisory | PHI | Berks | 3 hr |
| Aug 23, 12:32 AM EDT | River Flood Warning | PHI | Monroe | 10 hr |
| Aug 23, 12:55 AM EDT | River Flood Warning | PHI | Monroe | 10 hr |
| Aug 23, 2:36 AM EDT | Areal Flood Warning | PHI | Carbon, Monroe | 21 hr |
| Aug 23, 3:50 AM EDT | River Flood Warning | PHI | Carbon | 3 hr |
| Aug 23, 3:50 AM EDT | River Flood Warning | PHI | Lehigh, Northampton | 11 hr |
| Aug 23, 8:28 AM EDT | Areal Flood Warning | PHI | Lehigh | 7 hr |
| Aug 23, 4:41 PM EDT | Special Weather Statement | PHI | Montgomery | 34 min |
| Aug 23, 7:14 PM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle | 31 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.