Alert archive / New Jersey / Special Marine Warnings in 2021
Special Marine Warning 57, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this special marine warning at Jun 22, 2021, 3:26 PM EDT. It was in force for 68 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 22, 2021, 3:26 PM EDT (19:26 UTC)
- Expired
- Jun 22, 2021, 4:34 PM EDT
- In force
- 68 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.0 in
- Wind
- 40.0 mph
The radar
The Dover AFB radar (KDOX), 111 km from the middle of the area, began a volume at 19:27 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
Wallops Is Stn, VA (KWAL), launched 12:00Z, 7.4 hours before the alert went out and 140 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
- 1075 J/kg
- Mixed-layer CIN
- -97 J/kg
- Mixed-layer LCL
- 1069 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 39 m²/s²
- 0-3 km storm-relative helicity
- 115 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.4
The text
As transmitted.
728
WHUS51 KPHI 221926
SMWPHI
ANZ452-453-472-473-475-222100-
/O.NEW.KPHI.MA.W.0057.210622T1926Z-210622T2100Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Special Marine Warning
National Weather Service Mount Holly NJ
326 PM EDT Tue Jun 22 2021
The National Weather Service in Mount Holly NJ has issued a
* Special Marine Warning for...
Coastal waters from Little Egg Inlet to Cape May NJ out 20 nm...
Outer waters from Little Egg Inlet NJ to Fenwick Island DE out 20 to
40 nm...
* Until 500 PM EDT.
* At 326 PM EDT, strong thunderstorms were located along a line
extending from near Atlantic City Reef to 7 nm northwest of Chicken
Bone, moving northeast at 20 knots.
HAZARD...Wind gusts to 40 knots.
SOURCE...Radar.
IMPACT...Small craft could be damaged in briefly higher winds and
suddenly higher waves.
* Locations impacted include...
28-Mile Wreck, Deepwater Reef and Atlantic City Reef.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Move to safe harbor immediately as gusty winds and high waves are
expected.
&&
LAT...LON 3831 7459 3945 7428 3943 7413 3925 7352
3895 7377 3876 7400 3870 7415 3861 7417
3851 7426 3834 7427 3822 7431
TIME...MOT...LOC 1926Z 246DEG 22KT 3921 7427 3833 7453
HAIL...0.00IN
WIND...40KTS
$$
CMS2 follow-up statements
191
FZUS71 KPHI 222015
MWSPHI
Marine Weather Statement
National Weather Service Mount Holly NJ
415 PM EDT Tue Jun 22 2021
ANZ453-222024-
/O.CAN.KPHI.MA.W.0057.000000T0000Z-210622T2100Z/
415 PM EDT Tue Jun 22 2021
...THE SPECIAL MARINE WARNING IS CANCELLED...
The affected areas were...
Coastal waters from Great Egg Inlet to Cape May NJ out 20 nm...
The thunderstorms have moved out of the warned area and no longer
pose a significant threat to boaters.
LAT...LON 3822 7432 3826 7443 3857 7442 3940 7404
3925 7352 3895 7377 3876 7400 3870 7415
3861 7417 3851 7426 3834 7427
TIME...MOT...LOC 2014Z 246DEG 22KT 3932 7394 3844 7420
$$
ANZ452-472-473-475-222100-
/O.CON.KPHI.MA.W.0057.000000T0000Z-210622T2100Z/
415 PM EDT Tue Jun 22 2021
...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 500 PM EDT...
For the following areas...
Coastal waters from Little Egg Inlet to Great Egg Inlet NJ out 20
nm...
Waters from Cape May NJ to Fenwick Island DE out 20 to 40 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...
At 414 PM EDT, strong thunderstorms were located along a line
extending from 15 nm southeast of Little Egg Reef to 17 nm northeast
of Chicken Bone, moving northeast at 20 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...
Deepwater Reef.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Move to safe harbor immediately as gusty winds and high waves are
expected.
&&
LAT...LON 3822 7432 3826 7443 3857 7442 3940 7404
3925 7352 3895 7377 3876 7400 3870 7415
3861 7417 3851 7426 3834 7427
TIME...MOT...LOC 2014Z 246DEG 22KT 3932 7394 3844 7420
HAIL...0.00IN
WIND...>34KTS
$$
CMS540
FZUS71 KPHI 222034
MWSPHI
Marine Weather Statement
National Weather Service Mount Holly NJ
434 PM EDT Tue Jun 22 2021
ANZ452-472-473-475-222043-
/O.CAN.KPHI.MA.W.0057.000000T0000Z-210622T2100Z/
434 PM EDT Tue Jun 22 2021
...THE SPECIAL MARINE WARNING IS CANCELLED...
The affected areas were...
Coastal waters from Little Egg Inlet to Great Egg Inlet NJ out 20
nm...
Outer waters from Little Egg Inlet NJ to Fenwick Island DE out 20 to
40 nm...
The thunderstorms have moved out of the area and no longer pose a
significant threat to boaters.
LAT...LON 3822 7432 3826 7443 3857 7442 3940 7404
3925 7352 3895 7377 3876 7400 3870 7415
3861 7417 3851 7426 3834 7427
TIME...MOT...LOC 2032Z 246DEG 22KT 3937 7381 3849 7407
$$
CMSThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 21, 8:13 PM EDT | Severe Thunderstorm Warning | PHI | Morris, Sussex, Warren | 62 min |
| Jun 21, 8:31 PM EDT | Special Marine Warning | PHI | 59 min | |
| Jun 21, 10:01 PM EDT | Special Marine Warning | PHI | 29 min | |
| Jun 22, 11:46 AM EDT | Special Marine Warning | PHI | 44 min | |
| Jun 22, 12:51 PM EDT | Special Marine Warning | PHI | 114 min | |
| Jun 22, 1:25 PM EDT | Special Marine Warning | PHI | 65 min | |
| Jun 22, 1:47 PM EDT | Special Marine Warning | PHI | 118 min | |
| Jun 22, 2:27 PM EDT | Special Marine Warning | PHI | 93 min | |
| Jun 22, 3:05 PM EDT | Small Craft Advisory | PHI | 15 hr | |
| Jun 21, 9:28 PM EDT | Special Weather Statement | PHI | Kent | 47 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.