Alert archive / Delaware / Coastal Flood Advisories in 2021
Coastal Flood Advisory 3, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this coastal flood advisory at Feb 2, 2021, 6:04 AM EST for Kent County, Delaware; Cumberland County, New Jersey. It took effect at Feb 2, 2021, 9:00 AM EST. It was in force for 5 hr.
The area
The counties it named.
The facts
- Issued
- Feb 2, 2021, 6:04 AM EST (11:04 UTC)
- In effect from
- Feb 2, 2021, 9:00 AM EST
- Expired
- Feb 2, 2021, 2:00 PM EST
- In force
- 5 hr
- Issued by
- NWS Philadelphia/Mount Holly
Counties Kent County, DE, Cumberland County, NJ
The radar
The Dover AFB radar (KDOX), 44 km from the middle of the area, began a volume at 11:06 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
Wallops Is Stn, VA (KWAL), launched 00:00Z, 11.1 hours before the alert went out and 143 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
- 1 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 562 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 84 m²/s²
- 0-3 km storm-relative helicity
- 122 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
848
WHUS41 KPHI 021104
CFWPHI
Coastal Hazard Message
National Weather Service Mount Holly NJ
604 AM EST Tue Feb 2 2021
NJZ012>014-020-026-027-022200-
/O.CON.KPHI.CF.W.0001.000000T0000Z-210202T2200Z/
Middlesex-Western Monmouth-Eastern Monmouth-Ocean-Coastal Ocean-
Southeastern Burlington-
604 AM EST Tue Feb 2 2021
...COASTAL FLOOD WARNING REMAINS IN EFFECT UNTIL 5 PM EST THIS
AFTERNOON...
* WHAT...One to two feet of inundation above ground level
expected in low-lying areas near shorelines and tidal
waterways.
* WHERE...Tidal areas in the counties of Middlesex, Monmouth,
Ocean and southeastern Burlington.
* WHEN...Until 5:00 PM Tuesday.
* IMPACTS...At this level, widespread roadway flooding occurs in
coastal and bayside communities and along inland tidal
waterways. Many roads become impassable. Some damage to
vulnerable structures may begin to occur.
* ADDITIONAL DETAILS...The potential for minor flooding is
expected to linger into Wednesday.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Coastal Flood Warning means that moderate or major tidal
flooding is occurring or imminent. Be prepared for rising water
levels and take appropriate action to protect life and property.
Follow the recommendations of local emergency management
officials.
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
-------- --------- --------- --------- --------
02/11 AM 7.5 1.8 2.2 Minor
03/12 AM 7.4 1.7 2.1 Minor
03/12 PM 6.4 0.7 1.4 None
04/01 AM 6.3 0.6 1.0 None
04/01 PM 5.4 -0.3 0.7 None
05/02 AM 6.3 0.6 1.0 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
-------- --------- --------- --------- --------
02/10 AM 6.7 2.3 2.4 Moderate
03/12 AM 6.3 1.9 1.9 Minor
03/12 PM 5.5 1.1 1.3 None
04/12 AM 5.2 0.8 0.8 None
04/01 PM 4.4 -0.0 0.5 None
05/01 AM 5.1 0.7 0.6 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
-------- --------- --------- --------- --------
02/11 AM 7.2 2.0 2.3 Minor
03/12 AM 7.0 1.8 2.2 Minor
03/12 PM 6.2 1.0 1.6 None
04/01 AM 6.0 0.8 1.1 None
04/01 PM 5.2 -0.0 0.8 None
05/02 AM 5.9 0.7 1.0 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
-------- --------- --------- --------- --------
02/10 AM 4.5 2.0 2.4 Moderate
02/11 PM 3.7 1.2 1.6 Minor
03/12 PM 3.1 0.6 1.1 None
04/12 AM 2.7 0.2 0.5 None
04/01 PM 2.1 -0.4 0.3 None
05/01 AM 2.4 -0.1 0.2 None
&&
$$
DEZ003-004-NJZ022>025-022200-
/O.CON.KPHI.CF.W.0001.000000T0000Z-210202T2200Z/
Inland Sussex-Delaware Beaches-Atlantic-Cape May-
Atlantic Coastal Cape May-Coastal Atlantic-
604 AM EST Tue Feb 2 2021
...COASTAL FLOOD WARNING REMAINS IN EFFECT UNTIL 5 PM EST THIS
AFTERNOON...
* WHAT...One to two feet of inundation above ground level
expected 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 5:00 PM Tuesday.
* IMPACTS...At this level, widespread roadway flooding occurs in
coastal and bayside communities and along inland tidal
waterways. Many roads become impassable. Some damage to
vulnerable structures may begin to occur.
* ADDITIONAL DETAILS...The potential for minor flooding is
expected to linger into Wednesday.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Coastal Flood Warning means that moderate or major tidal
flooding is occurring or imminent. Be prepared for rising water
levels and take appropriate action to protect life and property.
Follow the recommendations of local emergency management
officials.
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
-------- --------- --------- --------- --------
02/11 AM 6.6 2.0 2.4 Minor
03/12 AM 6.1 1.5 1.9 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 5.2 0.5 0.9 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
-------- --------- --------- --------- --------
02/10 AM 6.6 2.0 2.5 Minor
03/12 AM 6.2 1.6 2.3 Minor
03/11 AM 5.5 0.9 1.7 None
04/12 AM 5.1 0.5 1.1 None
04/12 PM 4.4 -0.2 0.9 None
05/01 AM 5.0 0.4 1.0 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
-------- --------- --------- --------- --------
02/11 AM 6.4 2.4 2.4 Moderate
03/12 AM 5.9 1.9 2.1 Minor
03/12 PM 5.2 1.2 1.5 None
04/01 AM 4.9 0.9 1.0 None
04/01 PM 4.2 0.2 0.8 None
05/02 AM 4.8 0.8 0.9 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 AM 6.9 1.8 2.2 Minor
03/12 AM 6.3 1.2 1.9 Minor
03/12 PM 5.7 0.6 1.4 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
&&
$$
DEZ002-NJZ021-021900-
/O.NEW.KPHI.CF.Y.0003.210202T1400Z-210202T1900Z/
Kent-Cumberland-
604 AM EST Tue Feb 2 2021
...COASTAL FLOOD ADVISORY IN EFFECT UNTIL 2 PM EST THIS
AFTERNOON...
* WHAT...Up to one half foot of inundation above ground level
expected in low-lying areas near shorelines and tidal
waterways.
* WHERE...In New Jersey, Cumberland. In Delaware, Kent.
* WHEN...Until 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.
Murderkill River at Bowers Beach
MLLW Categories - Minor 6.1 ft, Moderate 7.1 ft, Major 8.1 ft
MHHW Categories - Minor 0.9 ft, Moderate 1.9 ft, Major 2.9 ft
Total Total Departure
Day/Time Tide Tide from Norm Flood
ft MLLW ft MHHW ft Impact
-------- --------- --------- --------- --------
02/12 PM 6.4 1.2 1.3 Minor
03/01 AM 5.8 0.6 0.9 None
03/01 PM 5.3 0.1 0.5 None
04/02 AM 5.0 -0.2 0.0 None
04/02 PM 4.5 -0.7 0.1 None
05/03 AM 5.6 0.4 0.5 None
Maurice River at Bivalve
MLLW Categories - Minor 7.6 ft, Moderate 8.6 ft, Major 9.6 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
-------- --------- --------- --------- --------
02/12 PM 7.9 1.6 1.9 Minor
03/01 AM 7.1 0.8 1.4 None
03/01 PM 6.8 0.5 1.1 None
04/02 AM 6.3 0.0 0.6 None
04/02 PM 5.9 -0.4 0.6 None
05/03 AM 6.8 0.5 1.0 None
&&
$$1 follow-up statement
718
WHUS41 KPHI 021858
CFWPHI
Coastal Hazard Message
National Weather Service Mount Holly NJ
158 PM EST Tue Feb 2 2021
DEZ002-NJZ021-022000-
/O.EXP.KPHI.CF.Y.0003.000000T0000Z-210202T1900Z/
Kent-Cumberland-
158 PM EST Tue Feb 2 2021
...COASTAL FLOOD ADVISORY WILL EXPIRE AT 2 PM EST THIS
AFTERNOON...
Water levels will continue to decrease in the tidal areas of Kent
County, Delaware and Cumberland County, New Jersey. As a result,
the Coastal Flood Advisory will expire at 200 PM.
$$
NJZ012>014-020-026-027-022200-
/O.CON.KPHI.CF.W.0001.000000T0000Z-210202T2200Z/
Middlesex-Western Monmouth-Eastern Monmouth-Ocean-Coastal Ocean-
Southeastern Burlington-
158 PM EST Tue Feb 2 2021
...COASTAL FLOOD WARNING REMAINS IN EFFECT UNTIL 5 PM EST THIS
AFTERNOON...
* WHAT...One to two feet of inundation above ground level
expected in low-lying areas near shorelines and tidal waterways.
* WHERE...Tidal areas in the counties of Middlesex, Monmouth,
Ocean and southeastern Burlington.
* WHEN...Until 5:00 PM this afternoon.
* IMPACTS...At this level, widespread roadway flooding occurs in
coastal and bayside communities and along inland tidal
waterways. Many roads become impassable. Some damage to
vulnerable structures may begin to occur.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Coastal Flood Warning means that moderate or major tidal
flooding is occurring or imminent. Be prepared for rising water
levels and take appropriate action to protect life and property.
Follow the recommendations of local emergency management
officials.
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 6.4 0.7 1.4 None
04/01 AM 6.3 0.6 1.0 None
04/01 PM 5.4 -0.3 0.7 None
05/02 AM 6.3 0.6 1.0 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 6.3 1.9 1.9 Minor
03/12 PM 5.5 1.1 1.3 None
04/12 AM 5.2 0.8 0.8 None
04/01 PM 4.4 -0.0 0.5 None
05/01 AM 5.1 0.7 0.6 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 6.2 1.0 1.6 None
04/01 AM 6.0 0.8 1.1 None
04/01 PM 5.2 -0.0 0.8 None
05/02 AM 5.9 0.7 1.0 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 3.1 0.6 1.1 None
04/12 AM 2.7 0.2 0.5 None
04/01 PM 2.1 -0.4 0.3 None
05/01 AM 2.4 -0.1 0.2 None
&&
$$
DEZ003-004-NJZ022>025-022200-
/O.CON.KPHI.CF.W.0001.000000T0000Z-210202T2200Z/
Inland Sussex-Delaware Beaches-Atlantic-Cape May-
Atlantic Coastal Cape May-Coastal Atlantic-
158 PM EST Tue Feb 2 2021
...COASTAL FLOOD WARNING REMAINS IN EFFECT UNTIL 5 PM EST THIS
AFTERNOON...
* WHAT...One to two feet of inundation above ground level
expected 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 5:00 PM this afternoon.
* IMPACTS...At this level, widespread roadway flooding occurs in
coastal and bayside communities and along inland tidal
waterways. Many roads become impassable. Some damage to
vulnerable structures may begin to occur.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Coastal Flood Warning means that moderate or major tidal
flooding is occurring or imminent. Be prepared for rising water
levels and take appropriate action to protect life and property.
Follow the recommendations of local emergency management
officials.
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 6.1 1.5 1.9 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 5.2 0.5 0.9 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
-------- --------- --------- --------- --------
03/12 AM 6.2 1.6 2.3 Minor
03/11 AM 5.5 0.9 1.7 None
04/12 AM 5.1 0.5 1.1 None
04/12 PM 4.4 -0.2 0.9 None
05/01 AM 5.0 0.4 1.0 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 5.9 1.9 2.1 Minor
03/12 PM 5.2 1.2 1.5 None
04/01 AM 4.9 0.9 1.0 None
04/01 PM 4.2 0.2 0.8 None
05/02 AM 4.8 0.8 0.9 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
-------- --------- --------- --------- --------
03/12 AM 6.3 1.2 1.9 Minor
03/12 PM 5.7 0.6 1.4 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
&&
$$The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 2, 3:05 PM EST | Coastal Flood Advisory | PHI | Sussex | 13 hr |
| Feb 1, 9:54 PM EST | Small Craft Advisory | PHI | 63 hr |
Nearby
Coastal Flood Advisories in Delaware, 2021Coastal Flood Advisories in New Jersey, 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.