Alert archive / New Jersey / Special Marine Warnings in 2021
Special Marine Warning 22, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this special marine warning at May 26, 2021, 7:04 PM EDT. It was in force for 26 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, 7:04 PM EDT (23:04 UTC)
- Expired
- May 26, 2021, 7:30 PM EDT
- In force
- 26 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), 78 km from the middle of the area, began a volume at 23:04 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
Washington/Dulle, VA (KIAD), launched 12:00Z, 11.1 hours before the alert went out and 173 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
- 478 J/kg
- Mixed-layer CIN
- -132 J/kg
- Mixed-layer LCL
- 922 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 35 m²/s²
- 0-3 km storm-relative helicity
- 50 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted.
859
WHUS51 KPHI 262304
SMWPHI
ANZ430-262330-
/O.NEW.KPHI.MA.W.0022.210526T2304Z-210526T2330Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Special Marine Warning
National Weather Service Mount Holly NJ
704 PM EDT Wed May 26 2021
The National Weather Service in Mount Holly NJ has issued a
* Special Marine Warning for...
Upper Delaware Bay...
* Until 730 PM EDT.
* At 704 PM EDT, a strong thunderstorm was located 8 nm west of Stony
Point, moving east at 35 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...
Woodland Beach, Stony Point, Sea Breeze, Pea Patch Island and Reedy
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 3967 7562 3976 7551 3932 7529 3931 7556
3940 7562
TIME...MOT...LOC 2304Z 252DEG 35KT 3944 7570
HAIL...0.00IN
WIND...>34KTS
$$
Meola1 follow-up statement
406
FZUS71 KPHI 262328
MWSPHI
Marine Weather Statement
National Weather Service Mount Holly NJ
728 PM EDT Wed May 26 2021
ANZ430-262338-
/O.EXP.KPHI.MA.W.0022.000000T0000Z-210526T2330Z/
728 PM EDT Wed May 26 2021
...THE SPECIAL MARINE WARNING WILL EXPIRE AT 730 PM EDT...
The affected areas were...
Upper Delaware Bay...
The thunderstorm has weakened and no longer poses a significant
threat to boaters.
A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
central and northern Delaware...southern New Jersey...and the
adjacent coastal waters.
LAT...LON 3967 7562 3976 7551 3932 7529 3931 7556
3940 7562
TIME...MOT...LOC 2328Z 252DEG 35KT 3951 7543
$$
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, 7:23 PM EDT | Special Marine Warning | PHI | 97 min | |
| May 26, 7:56 PM EDT | Special Marine Warning | PHI | 71 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.