Alert archive / New Jersey / Coastal Flood Statements in 2021
Coastal Flood Statement 12, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this coastal flood statement at Oct 31, 2021, 9:06 PM EDT for Ocean County, New Jersey. It was in force for 8 hr.
The area
The counties it named.
The facts
- Issued
- Oct 31, 2021, 9:06 PM EDT (01:06 UTC)
- Expired
- Nov 1, 2021, 5:05 AM EDT
- In force
- 8 hr
- Issued by
- NWS Philadelphia/Mount Holly
County Ocean County, NJ
The radar
The Philadelphia radar (KDIX), 16 km from the middle of the area, began a volume at 01:06 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 00:00Z, 1.1 hours before the alert went out and 162 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
- 31 J/kg
- Mixed-layer CIN
- -14 J/kg
- Mixed-layer LCL
- 1000 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 159 m²/s²
- 0-3 km storm-relative helicity
- 150 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
436
WHUS41 KPHI 010106
CFWPHI
Coastal Hazard Message
National Weather Service Mount Holly NJ
906 PM EDT Sun Oct 31 2021
NJZ020-026-011300-
/O.EXP.KPHI.CF.Y.0017.000000T0000Z-211101T0100Z/
/O.NEW.KPHI.CF.S.0012.211101T0106Z-211101T1300Z/
Ocean-Coastal Ocean-
906 PM EDT Sun Oct 31 2021
...COASTAL FLOOD ADVISORY HAS EXPIRED...
* WHAT...Up to one half 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...Until 9 AM EDT Monday.
* IMPACTS...Minor roadway flooding is possible.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Do not drive through flooded roadways.
&&
Time of high total tides are approximate to the nearest hour.
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
-------- --------- --------- --------- --------
01/05 AM 3.1 0.6 0.7 None
01/05 PM 3.0 0.5 0.5 None
02/06 AM 3.1 0.6 0.5 None
02/06 PM 3.0 0.5 0.4 None
03/07 AM 3.4 0.9 0.5 None
&&
$$
DEZ003-004-010215-
/O.EXP.KPHI.CF.S.0011.000000T0000Z-211101T0100Z/
Inland Sussex-Delaware Beaches-
906 PM EDT Sun Oct 31 2021
Water levels are dropping and tidal flooding is no longer
expected.
$$
NJZ015-017>019-PAZ070-071-106-010500-
/O.CON.KPHI.CF.Y.0018.000000T0000Z-211101T0500Z/
Mercer-Gloucester-Camden-Northwestern Burlington-Delaware-
Philadelphia-Lower Bucks-
906 PM EDT Sun Oct 31 2021
...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 1 AM EDT
MONDAY...
* WHAT...Up to one half foot of inundation above ground level in
low-lying areas near shorelines and tidal waterways.
* WHERE...In New Jersey, Gloucester, Mercer, Camden and
Northwestern Burlington. In Pennsylvania, Delaware, Lower
Bucks and Philadelphia.
* WHEN...Until 1 AM EDT Monday.
* IMPACTS...At this level, flooding begins on the most
vulnerable roads along tidal waterways. Some partial or full
road closures are possible.
* ADDITIONAL DETAILS...Water levels will be on the decrease on
Monday, with no additional flooding anticipated.
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 River at Burlington
MLLW Categories - Minor 9.3 ft, Moderate 10.3 ft, Major 11.3 ft
MHHW Categories - Minor 1.6 ft, Moderate 2.6 ft, Major 3.6 ft
Total Total Departure
Day/Time Tide Tide from Norm Flood
ft MLLW ft MHHW ft Impact
-------- --------- --------- --------- --------
31/11 PM 9.3 1.6 1.7 Minor
01/12 PM 8.8 1.1 1.2 None
02/12 AM 8.9 1.2 1.0 None
02/01 PM 9.1 1.4 1.0 None
03/01 AM 9.1 1.4 1.0 None
03/02 PM 9.4 1.7 0.9 Minor
Delaware River at Philadelphia
MLLW Categories - Minor 8.2 ft, Moderate 9.2 ft, Major 10.2 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
-------- --------- --------- --------- --------
31/11 PM 8.2 1.5 1.5 Minor
01/11 AM 7.5 0.8 1.1 None
02/12 AM 7.8 1.1 1.0 None
02/12 PM 7.7 1.0 1.0 None
03/01 AM 7.8 1.1 1.0 None
03/01 PM 8.1 1.4 1.1 None
&&
$$2 follow-up statements
188 WHUS41 KPHI 010400 CFWPHI Coastal Hazard Message National Weather Service Mount Holly NJ 1200 AM EDT Mon Nov 1 2021 NJZ015-017>019-PAZ070-071-106-010500- /O.CAN.KPHI.CF.Y.0018.000000T0000Z-211101T0500Z/ Mercer-Gloucester-Camden-Northwestern Burlington-Delaware- Philadelphia-Lower Bucks- 1200 AM EDT Mon Nov 1 2021 ...COASTAL FLOOD ADVISORY IS CANCELLED... Water levels will continue to decrease on the tidal Delaware River and its tidal tributaries. As a result, the Coastal Flood Advisory has been cancelled. $$ NJZ020-026-011600- /O.EXT.KPHI.CF.S.0012.000000T0000Z-211101T1600Z/ Ocean-Coastal Ocean- 1200 AM EDT Mon Nov 1 2021 ...MINOR TIDAL FLOODING ALONG BARNEGAT BAY INTO MONDAY MORNING... * WHAT...Up to one half 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 Monday morning. * IMPACTS...Minor roadway flooding is possible. PRECAUTIONARY/PREPAREDNESS ACTIONS... Do not drive on flooded roadways. $$ Iovino
538 WHUS41 KPHI 010905 CFWPHI Coastal Hazard Message National Weather Service Mount Holly NJ 505 AM EDT Mon Nov 1 2021 NJZ020-026-011015- /O.CAN.KPHI.CF.S.0012.000000T0000Z-211101T1600Z/ Ocean-Coastal Ocean- 505 AM EDT Mon Nov 1 2021 ...MINOR TIDAL FLOODING HAS ENDED ALONG BARNEGAT BAY... Enough water had drained out of Barnegat Bay by early this morning to bring the potential for minor tidal flooding to an end. $$ Iovino
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 1, 2:25 PM EDT | Freeze Watch | PHI | Hunterdon, Morris, Somerset, Sussex, Warren | 13 hr |
Nearby
Coastal Flood Statements in New Jersey, 2021Every coastal flood statement 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.