Alert archive / New Jersey / Coastal Flood Advisories in 2021
Coastal Flood Advisory 4, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this coastal flood advisory at Feb 2, 2021, 3:05 PM EST for 6 counties in New Jersey; Sussex County, Delaware. It was in force for 13 hr.
The area
The counties it named.
The facts
- Issued
- Feb 2, 2021, 3:05 PM EST (20:05 UTC)
- Expired
- Feb 3, 2021, 4:00 AM EST
- In force
- 13 hr
- Issued by
- NWS Philadelphia/Mount Holly
Counties Sussex County, DE, Atlantic County, NJ, Burlington County, NJ, Cape May County, NJ, Middlesex County, NJ, Monmouth County, NJ, Ocean County, NJ
The radar
The Philadelphia radar (KDIX), 35 km from the middle of the area, began a volume at 20:04 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
Brookhaven, NY (KOKX), launched 12:00Z, 8.1 hours before the alert went out and 199 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 437 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 480 m²/s²
- 0-3 km storm-relative helicity
- 513 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
513
WHUS41 KPHI 022005
CFWPHI
Coastal Hazard Message
National Weather Service Mount Holly NJ
305 PM EST Tue Feb 2 2021
NJZ012>014-020-026-027-030900-
/O.CAN.KPHI.CF.W.0001.000000T0000Z-210202T2200Z/
/O.NEW.KPHI.CF.Y.0004.210202T2005Z-210203T0900Z/
Middlesex-Western Monmouth-Eastern Monmouth-Ocean-Coastal Ocean-
Southeastern Burlington-
305 PM EST Tue Feb 2 2021
...COASTAL FLOOD ADVISORY IN EFFECT UNTIL 4 AM EST WEDNESDAY...
...COASTAL FLOOD WARNING IS CANCELLED...
* WHAT...Up to one half foot of inundation above ground level in
low-lying areas near shorelines and tidal waterways.
* WHERE...Tidal areas in the counties of Middlesex, Monmouth,
Ocean and southeastern Burlington.
* WHEN...Until 4:00 AM Wednesday.
* IMPACTS...At this level, flooding begins on the most vulnerable
roads in coastal and bayside communities, and along inland
tidal waterways. Some partial or full road closures are
possible.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Coastal Flood Advisory means that minor tidal flooding is
expected. Minor tidal flooding often results in some road
closures. Usually, the most vulnerable roadways will flood.
Do not leave your vehicle at a location that is prone to tidal
flooding. Do not drive your vehicle through flood waters. The
water may be deeper than you think it is. You will be putting
yourself in danger and your vehicle may be damaged, leading to
costly repairs.
Visit the Advanced Hydrologic Prediction Service at
water.weather.gov/ahps for additional water level and flood impact
information for your local tide gauge.
&&
Time of high total tides are approximate to the nearest hour.
Arthur Kill at Perth Amboy
MLLW Categories - Minor 7.2 ft, Moderate 8.2 ft, Major 9.2 ft
MHHW Categories - Minor 1.5 ft, Moderate 2.5 ft, Major 3.5 ft
Total Total Departure
Day/Time Tide Tide from Norm Flood
ft MLLW ft MHHW ft Impact
-------- --------- --------- --------- --------
03/12 AM 7.4 1.7 2.1 Minor
03/12 PM 6.5 0.8 1.5 None
04/01 AM 6.4 0.7 1.1 None
04/01 PM 5.6 -0.1 0.9 None
05/02 AM 6.4 0.7 1.1 None
Watson Creek at Manasquan
MLLW Categories - Minor 5.7 ft, Moderate 6.7 ft, Major 7.7 ft
MHHW Categories - Minor 1.3 ft, Moderate 2.3 ft, Major 3.3 ft
Total Total Departure
Day/Time Tide Tide from Norm Flood
ft MLLW ft MHHW ft Impact
-------- --------- --------- --------- --------
03/12 AM 6.0 1.6 1.6 Minor
03/12 PM 5.5 1.1 1.3 None
04/12 AM 5.2 0.8 0.8 None
04/01 PM 4.5 0.1 0.6 None
05/01 AM 5.2 0.8 0.7 None
05/01 PM 4.3 -0.1 0.7 None
Sandy Hook Bay at Sandy Hook
MLLW Categories - Minor 6.7 ft, Moderate 7.7 ft, Major 8.7 ft
MHHW Categories - Minor 1.5 ft, Moderate 2.5 ft, Major 3.5 ft
Total Total Departure
Day/Time Tide Tide from Norm Flood
ft MLLW ft MHHW ft Impact
-------- --------- --------- --------- --------
03/12 AM 7.0 1.8 2.2 Minor
03/12 PM 6.3 1.1 1.7 None
04/01 AM 6.1 0.9 1.2 None
04/01 PM 5.4 0.2 1.0 None
05/02 AM 6.1 0.9 1.2 None
Barnegat Bay at Barnegat Light
MLLW Categories - Minor 3.5 ft, Moderate 4.5 ft, Major 5.5 ft
MHHW Categories - Minor 1.0 ft, Moderate 2.0 ft, Major 3.0 ft
Total Total Departure
Day/Time Tide Tide from Norm Flood
ft MLLW ft MHHW ft Impact
-------- --------- --------- --------- --------
02/11 PM 3.7 1.2 1.6 Minor
03/12 PM 3.0 0.5 1.0 None
04/12 AM 2.7 0.2 0.5 None
04/01 PM 2.1 -0.4 0.3 None
05/01 AM 2.5 -0.0 0.3 None
&&
$$
DEZ003-004-NJZ022>025-030900-
/O.CAN.KPHI.CF.W.0001.000000T0000Z-210202T2200Z/
/O.NEW.KPHI.CF.Y.0004.210202T2005Z-210203T0900Z/
Inland Sussex-Delaware Beaches-Atlantic-Cape May-
Atlantic Coastal Cape May-Coastal Atlantic-
305 PM EST Tue Feb 2 2021
...COASTAL FLOOD ADVISORY IN EFFECT UNTIL 4 AM EST WEDNESDAY...
...COASTAL FLOOD WARNING IS CANCELLED...
* WHAT...Up to one half foot of inundation above ground level in
low-lying areas near shorelines and tidal waterways.
* WHERE...Tidal areas in the New Jersey counties of Atlantic and
Cape May. Tidal areas in Sussex County, Delaware.
* WHEN...Until 4:00 AM Wednesday.
* IMPACTS...At this level, flooding begins on the most vulnerable
roads in coastal and bayside communities, and along inland
tidal waterways. Some partial or full road closures are
possible.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Coastal Flood Advisory means that minor tidal flooding is
expected. Minor tidal flooding often results in some road
closures. Usually, the most vulnerable roadways will flood.
Do not leave your vehicle at a location that is prone to tidal
flooding. Do not drive your vehicle through flood waters. The
water may be deeper than you think it is. You will be putting
yourself in danger and your vehicle may be damaged, leading to
costly repairs.
Visit the Advanced Hydrologic Prediction Service at
water.weather.gov/ahps for additional water level and flood impact
information for your local tide gauge.
&&
Time of high total tides are approximate to the nearest hour.
Delaware Bay at Lewes
MLLW Categories - Minor 6.0 ft, Moderate 7.0 ft, Major 8.0 ft
MHHW Categories - Minor 1.3 ft, Moderate 2.3 ft, Major 3.3 ft
Total Total Departure
Day/Time Tide Tide from Norm Flood
ft MLLW ft MHHW ft Impact
-------- --------- --------- --------- --------
03/12 AM 6.3 1.7 2.1 Minor
03/01 PM 5.6 1.0 1.5 None
04/01 AM 5.2 0.5 1.0 None
04/02 PM 4.5 -0.2 0.8 None
05/02 AM 5.3 0.7 1.0 None
Atlantic Ocean at Atlantic City
MLLW Categories - Minor 6.0 ft, Moderate 7.0 ft, Major 8.0 ft
MHHW Categories - Minor 1.4 ft, Moderate 2.4 ft, Major 3.4 ft
Total Total Departure
Day/Time Tide Tide from Norm Flood
ft MLLW ft MHHW ft Impact
-------- --------- --------- --------- --------
02/11 PM 6.3 1.7 2.4 Minor
03/11 AM 5.5 0.9 1.7 None
04/12 AM 5.2 0.6 1.2 None
04/01 PM 4.6 0.0 1.1 None
05/01 AM 5.2 0.6 1.2 None
Great Egg Harbor Bay at Ocean City
MLLW Categories - Minor 5.3 ft, Moderate 6.3 ft, Major 7.3 ft
MHHW Categories - Minor 1.3 ft, Moderate 2.3 ft, Major 3.3 ft
Total Total Departure
Day/Time Tide Tide from Norm Flood
ft MLLW ft MHHW ft Impact
-------- --------- --------- --------- --------
03/12 AM 5.6 1.6 1.8 Minor
03/12 PM 5.0 1.0 1.3 None
04/01 AM 4.9 0.9 1.0 None
04/01 PM 4.2 0.2 0.8 None
05/02 AM 4.9 0.9 1.0 None
Cape May Harbor at Cape May
MLLW Categories - Minor 6.2 ft, Moderate 7.2 ft, Major 8.2 ft
MHHW Categories - Minor 1.1 ft, Moderate 2.1 ft, Major 3.1 ft
Total Total Departure
Day/Time Tide Tide from Norm Flood
ft MLLW ft MHHW ft Impact
-------- --------- --------- --------- --------
02/11 PM 6.4 1.3 2.1 Minor
03/12 PM 5.6 0.5 1.3 None
04/01 AM 5.4 0.3 0.9 None
04/01 PM 4.7 -0.4 0.8 None
05/02 AM 5.5 0.4 1.0 None
&&
$$
Iovino1 follow-up statement
346 WHUS41 KPHI 030906 CFWPHI Coastal Hazard Message National Weather Service Mount Holly NJ 406 AM EST Wed Feb 3 2021 NJZ020-026-040000- /O.EXP.KPHI.CF.Y.0004.000000T0000Z-210203T0900Z/ /O.NEW.KPHI.CF.S.0003.210203T0906Z-210204T0000Z/ Ocean-Coastal Ocean- 406 AM EST Wed Feb 3 2021 ...MINOR FLOODING CONTINUES ALONG BARNEGAT BAY... * WHAT...Up to 1 foot of inundation above ground level in low- lying areas near shorelines and tidal waterways. * WHERE...Barnegat Bay and the tidal waterways that flow into it. * WHEN...Through this evening. * IMPACTS...Minor roadway flooding is possible. PRECAUTIONARY/PREPAREDNESS ACTIONS... Do not drive through flooded roadways. && $$ DEZ003-004-040000- /O.EXP.KPHI.CF.Y.0004.000000T0000Z-210203T0900Z/ /O.NEW.KPHI.CF.S.0003.210203T0906Z-210204T0000Z/ Inland Sussex-Delaware Beaches- 406 AM EST Wed Feb 3 2021 ...MINOR FLOODING CONTINUES ALONG LITTLE ASSAWOMAN BAY... * WHAT...Up to 1 foot of inundation above ground level in low- lying areas near shorelines and tidal waterways. * WHERE...Little Assawoman Bay and the tidal waterways that flow into it. * WHEN...Through this evening. * IMPACTS...Minor roadway flooding is possible. PRECAUTIONARY/PREPAREDNESS ACTIONS... Do not drive through flooded roadways. && $$ NJZ012>014-022>025-027-031015- /O.EXP.KPHI.CF.Y.0004.000000T0000Z-210203T0900Z/ Middlesex-Western Monmouth-Eastern Monmouth-Atlantic-Cape May- Atlantic Coastal Cape May-Coastal Atlantic- Southeastern Burlington- 406 AM EST Wed Feb 3 2021 ...COASTAL FLOOD ADVISORY HAS EXPIRED... Northwesterly winds and a departing low pressure system have caused flood waters to recede with no additional coastal flooding anticipated. $$
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 1, 9:54 PM EST | Small Craft Advisory | PHI | 63 hr | |
| Feb 2, 6:04 AM EST | Coastal Flood Advisory | PHI | Cumberland | 8 hr |
Nearby
Coastal Flood Advisories in New Jersey, 2021Coastal Flood Advisories in Delaware, 2021Every coastal flood advisory 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.