Alert archive / New Jersey / Coastal Flood Advisories in 2021
Coastal Flood Advisory 21, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this coastal flood advisory at Nov 6, 2021, 3:59 PM EDT for Sussex County, Delaware; Atlantic County, Cape May County, New Jersey. It took effect at Nov 7, 2021, 7:00 AM EST. It was in force for 7 hr.
The area
The counties it named.
The facts
- Issued
- Nov 6, 2021, 3:59 PM EDT (19:59 UTC)
- In effect from
- Nov 7, 2021, 7:00 AM EST
- Expired
- Nov 7, 2021, 2:00 PM EST
- In force
- 7 hr
- Issued by
- NWS Philadelphia/Mount Holly
Counties Sussex County, DE, Atlantic County, NJ, Cape May County, NJ
The radar
The Dover AFB radar (KDOX), 52 km from the middle of the area, began a volume at 20:01 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, 8.0 hours before the alert went out and 134 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
- 1194 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 23 m²/s²
- 0-3 km storm-relative helicity
- 238 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
488
WHUS41 KPHI 061959
CFWPHI
Coastal Hazard Message
National Weather Service Mount Holly NJ
359 PM EDT Sat Nov 6 2021
DEZ003-004-NJZ022>025-070900-
/O.NEW.KPHI.CF.Y.0021.211107T1200Z-211107T1900Z/
Inland Sussex-Delaware Beaches-Atlantic-Cape May-
Atlantic Coastal Cape May-Coastal Atlantic-
359 PM EDT Sat Nov 6 2021
...COASTAL FLOOD ADVISORY IN EFFECT FROM 7 AM TO 2 PM EST
SUNDAY...
* WHAT...Up to one foot of inundation above ground level
expected in low-lying areas near shorelines and tidal
waterways.
* WHERE...Tidal areas of Atlantic and Cape May Counties in New
Jersey and Sussex County in Delaware.
* WHEN...From 7 AM to 2 PM EST Sunday.
* 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
-------- --------- --------- --------- --------
06/11 PM 5.0 0.3 0.7 None
07/10 AM 6.4 1.8 0.7 Minor
07/11 PM 4.8 0.2 0.7 None
08/11 AM 6.3 1.7 0.8 Minor
09/12 AM 4.4 -0.2 0.5 None
09/12 PM 5.6 1.0 0.4 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
-------- --------- --------- --------- --------
06/09 PM 4.9 0.3 0.7 None
07/09 AM 6.3 1.7 0.7 Minor
07/09 PM 4.7 0.1 0.7 None
08/10 AM 6.2 1.6 0.8 Minor
08/10 PM 4.3 -0.3 0.6 None
09/11 AM 5.5 0.9 0.4 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
-------- --------- --------- --------- --------
06/10 PM 4.4 0.4 0.4 None
07/09 AM 5.5 1.5 0.3 Minor
07/09 PM 3.9 -0.1 0.3 None
08/10 AM 5.6 1.6 0.5 Minor
08/11 PM 3.8 -0.2 0.2 None
09/11 AM 4.9 0.9 0.1 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
-------- --------- --------- --------- --------
06/10 PM 5.3 0.2 0.5 None
07/09 AM 6.7 1.6 0.5 Minor
07/09 PM 4.8 -0.3 0.5 None
08/10 AM 6.6 1.5 0.6 Minor
08/10 PM 4.5 -0.6 0.4 None
09/11 AM 5.9 0.8 0.3 None
&&
$$
CMS3 follow-up statements
064
WHUS41 KPHI 070858
CFWPHI
Coastal Hazard Message
National Weather Service Mount Holly NJ
358 AM EST Sun Nov 7 2021
DEZ003-004-NJZ022>025-071900-
/O.CON.KPHI.CF.Y.0021.211107T1200Z-211107T1900Z/
Inland Sussex-Delaware Beaches-Atlantic-Cape May-
Atlantic Coastal Cape May-Coastal Atlantic-
358 AM EST Sun Nov 7 2021
...COASTAL FLOOD ADVISORY REMAINS IN EFFECT FROM 7 AM THIS
MORNING TO 2 PM EST THIS AFTERNOON...
* WHAT...Up to one foot of inundation above ground level
expected in low-lying areas near shorelines and tidal
waterways.
* WHERE...Tidal areas of Atlantic and Cape May Counties in New
Jersey and Sussex County in Delaware.
* WHEN...From 7 AM this morning to 2 PM EST this afternoon.
* 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
-------- --------- --------- --------- --------
06/11 PM 5.0 0.3 0.7 None
07/10 AM 6.4 1.8 0.7 Minor
07/11 PM 4.8 0.2 0.7 None
08/11 AM 6.3 1.7 0.8 Minor
09/12 AM 4.4 -0.2 0.5 None
09/12 PM 5.6 1.0 0.4 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
-------- --------- --------- --------- --------
06/09 PM 4.9 0.3 0.7 None
07/09 AM 6.3 1.7 0.7 Minor
07/09 PM 4.7 0.1 0.7 None
08/10 AM 6.2 1.6 0.8 Minor
08/10 PM 4.3 -0.3 0.6 None
09/11 AM 5.5 0.9 0.4 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
-------- --------- --------- --------- --------
06/10 PM 4.4 0.4 0.4 None
07/09 AM 5.5 1.5 0.3 Minor
07/09 PM 3.9 -0.1 0.3 None
08/10 AM 5.6 1.6 0.5 Minor
08/11 PM 3.8 -0.2 0.2 None
09/11 AM 4.9 0.9 0.1 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
-------- --------- --------- --------- --------
06/10 PM 5.3 0.2 0.5 None
07/09 AM 6.7 1.6 0.5 Minor
07/09 PM 4.8 -0.3 0.5 None
08/10 AM 6.6 1.5 0.6 Minor
08/10 PM 4.5 -0.6 0.4 None
09/11 AM 5.9 0.8 0.3 None
&&
$$
Meola460
WHUS41 KPHI 071258
CFWPHI
Coastal Hazard Message
National Weather Service Mount Holly NJ
758 AM EST Sun Nov 7 2021
DEZ003-004-NJZ022>025-071900-
/O.CON.KPHI.CF.Y.0021.000000T0000Z-211107T1900Z/
Inland Sussex-Delaware Beaches-Atlantic-Cape May-
Atlantic Coastal Cape May-Coastal Atlantic-
758 AM EST Sun Nov 7 2021
...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 2 PM EST THIS
AFTERNOON...
* WHAT...Up to one foot of inundation above ground level
expected in low-lying areas near shorelines and tidal
waterways.
* WHERE...Tidal areas of Atlantic and Cape May Counties in New
Jersey and Sussex County in Delaware.
* WHEN...From 7 AM this morning to 2 PM EST this afternoon.
* 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
-------- --------- --------- --------- --------
07/10 AM 6.5 1.8 0.8 Minor
07/11 PM 4.9 0.2 0.8 None
08/11 AM 6.5 1.8 1.0 Minor
08/11 PM 4.6 -0.0 0.8 None
09/12 PM 5.7 1.0 0.5 None
10/01 AM 4.1 -0.5 0.4 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
-------- --------- --------- --------- --------
07/09 AM 6.5 1.9 0.9 Minor
07/09 PM 4.8 0.2 0.8 None
08/10 AM 6.4 1.8 1.0 Minor
08/10 PM 4.5 -0.1 0.8 None
09/11 AM 5.7 1.1 0.6 None
09/11 PM 4.0 -0.6 0.5 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
-------- --------- --------- --------- --------
07/09 AM 5.6 1.6 0.4 Minor
07/09 PM 4.0 0.0 0.4 None
08/10 AM 5.7 1.7 0.6 Minor
08/11 PM 4.0 0.0 0.4 None
09/11 AM 5.0 1.0 0.2 None
10/12 AM 3.5 -0.5 0.1 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
-------- --------- --------- --------- --------
07/09 AM 6.4 1.3 0.2 Minor
07/09 PM 4.7 -0.4 0.4 None
08/10 AM 6.7 1.6 0.7 Minor
08/10 PM 4.8 -0.3 0.7 None
09/11 AM 6.0 0.9 0.4 None
10/12 AM 4.3 -0.8 0.3 None
&&
$$568 WHUS41 KPHI 071848 CFWPHI Coastal Hazard Message National Weather Service Mount Holly NJ 148 PM EST Sun Nov 7 2021 DEZ003-004-NJZ022>025-072000- /O.EXP.KPHI.CF.Y.0021.000000T0000Z-211107T1900Z/ Inland Sussex-Delaware Beaches-Atlantic-Cape May- Atlantic Coastal Cape May-Coastal Atlantic- 148 PM EST Sun Nov 7 2021 ...COASTAL FLOOD ADVISORY WILL EXPIRE AT 2 PM EST THIS AFTERNOON... Tidal flooding from today's high tide is ending. Therefore, the coastal flood advisory will be allowed to expire. Another round of minor tidal flooding is expected on Monday, with additional advisories likely. Stay tuned to the latest forecasts. $$ CMS
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 6, 4:14 AM EDT | Coastal Flood Advisory | PHI | Kent, Sussex | 10 hr |
| Nov 5, 9:50 PM EDT | Small Craft Advisory | PHI | 4 days | |
| Nov 6, 3:27 AM EDT | Gale Watch | PHI | 11 hr | |
| Nov 6, 3:27 AM EDT | Small Craft Advisory | PHI | 4 days |
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.