Alert archive / New Jersey / Special Marine Warnings in 2021
Special Marine Warning 24, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this special marine warning at May 26, 2021, 7:56 PM EDT. It was in force for 71 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
- May 26, 2021, 7:56 PM EDT (23:56 UTC)
- Expired
- May 26, 2021, 9:07 PM EDT
- In force
- 71 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.0 in
- Wind
- 34.0 mph
The radar
The Dover AFB radar (KDOX), 46 km from the middle of the area, began a volume at 23:58 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, 11.9 hours before the alert went out and 139 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
- 74 J/kg
- Mixed-layer CIN
- -176 J/kg
- Mixed-layer LCL
- 822 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 96 m²/s²
- 0-3 km storm-relative helicity
- 83 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
280
WHUS51 KPHI 262356
SMWPHI
ANZ430-431-270130-
/O.NEW.KPHI.MA.W.0024.210526T2356Z-210527T0130Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Special Marine Warning
National Weather Service Mount Holly NJ
756 PM EDT Wed May 26 2021
The National Weather Service in Mount Holly NJ has issued a
* Special Marine Warning for...
Delaware Bay...
* Until 930 PM EDT.
* At 756 PM EDT, a strong thunderstorm was located 9 nm southwest of
Bowers Beach, moving northeast at 25 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...
Fortesque Beach, Brown Shoal Light, Fourteen Foot Bank Light,
Slaughter Beach, East Point, Bowers Beach, Miah Maull Light,
Brandywine Shoal Light, Cross Ledge Light and Cape May Point.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Protecting yourself from immediate threats to life and safety shall
take priority. Whenever possible, as long as it does not cause
greater harm, all COVID-19 protective action guidance should be
followed.
&&
LAT...LON 3928 7513 3926 7507 3929 7506 3932 7507
3937 7496 3931 7491 3923 7495 3921 7489
3898 7484 3883 7529 3894 7541 3899 7539
3903 7546 3909 7547
TIME...MOT...LOC 2356Z 242DEG 25KT 3894 7554
HAIL...0.00IN
WIND...>34KTS
$$
Meola2 follow-up statements
654
FZUS71 KPHI 270047
MWSPHI
Marine Weather Statement
National Weather Service Mount Holly NJ
847 PM EDT Wed May 26 2021
ANZ430-270057-
/O.CAN.KPHI.MA.W.0024.000000T0000Z-210527T0130Z/
847 PM EDT Wed May 26 2021
...THE SPECIAL MARINE WARNING IS CANCELLED...
The affected areas were...
Upper Delaware Bay...
The thunderstorm has moved out of the warned area and no longer
poses a significant threat to boaters.
A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
southern New Jersey...and the adjacent coastal waters.
LAT...LON 3917 7508 3923 7495 3921 7489 3898 7484
3891 7504 3905 7514
TIME...MOT...LOC 0047Z 242DEG 25KT 3911 7514
$$
ANZ431-270130-
/O.CON.KPHI.MA.W.0024.000000T0000Z-210527T0130Z/
847 PM EDT Wed May 26 2021
...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 930 PM EDT...
For the following areas...
Delaware Bay waters south of East Point NJ to Slaughter Beach DE...
At 847 PM EDT, a strong thunderstorm was located near Miah Maull
Light, moving northeast 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...
Cape May Point.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Protecting yourself from immediate threats to life and safety shall
take priority. Whenever possible, as long as it does not cause
greater harm, all COVID-19 protective action guidance should be
followed.
&&
LAT...LON 3917 7508 3923 7495 3921 7489 3898 7484
3891 7504 3905 7514
TIME...MOT...LOC 0047Z 242DEG 25KT 3911 7514
HAIL...0.00IN
WIND...>34KTS
$$
Meola599
FZUS71 KPHI 270107
MWSPHI
Marine Weather Statement
National Weather Service Mount Holly NJ
907 PM EDT Wed May 26 2021
ANZ431-270117-
/O.CAN.KPHI.MA.W.0024.000000T0000Z-210527T0130Z/
907 PM EDT Wed May 26 2021
...THE SPECIAL MARINE WARNING IS CANCELLED...
The affected areas were...
Lower Delaware Bay...
The thunderstorm has moved out of the area and no longer poses a
significant threat to boaters.
A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
southern New Jersey...and the adjacent coastal waters.
LAT...LON 3917 7508 3923 7495 3921 7489 3898 7484
3891 7504 3905 7514
TIME...MOT...LOC 0102Z 242DEG 25KT 3918 7498
$$
MeolaThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 26, 5:27 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Mercer | 48 min |
| May 26, 5:34 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Morris, Warren | 41 min |
| May 26, 5:53 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Camden, Hunterdon, Mercer, Middlesex, Monmouth and 2 more | 67 min |
| May 26, 6:08 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Middlesex, Morris, Somerset | 31 min |
| May 26, 6:49 PM EDT | Special Marine Warning | PHI | 56 min | |
| May 26, 7:04 PM EDT | Special Marine Warning | PHI | 26 min | |
| May 26, 7:23 PM EDT | Special Marine Warning | PHI | 97 min | |
| May 26, 3:39 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 56 min |
| May 26, 4:10 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Lehigh | 65 min |
| May 26, 4:46 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Chester, Lehigh, Montgomery, Northampton | 44 min |
| May 26, 4:52 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery | 38 min |
| May 26, 5:37 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 53 min |
| May 26, 6:52 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 38 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.