Alert archive / Delaware / Coastal Flood Statements in 2020
Coastal Flood Statement 15, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this coastal flood statement at Aug 16, 2020, 10:52 PM EDT for Sussex County, Delaware; Ocean County, New Jersey. It took effect at Aug 16, 2020, 11:00 PM EDT. It was in force for 4 hr.
The area
The counties it named.
The facts
- Issued
- Aug 16, 2020, 10:52 PM EDT (02:52 UTC)
- In effect from
- Aug 16, 2020, 11:00 PM EDT
- Expired
- Aug 17, 2020, 3:00 AM EDT
- In force
- 4 hr
- Issued by
- NWS Philadelphia/Mount Holly
Counties Sussex County, DE, Ocean County, NJ
The radar
The Dover AFB radar (KDOX), 75 km from the middle of the area, began a volume at 02:59 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, 2.9 hours before the alert went out and 158 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
- 592 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- -56 m²/s²
- 0-3 km storm-relative helicity
- 23 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
649
WHUS41 KPHI 170252
CFWPHI
Coastal Hazard Message
National Weather Service Mount Holly NJ
1052 PM EDT Sun Aug 16 2020
NJZ020-026-170700-
/O.EXP.KPHI.CF.Y.0020.000000T0000Z-200817T0300Z/
/O.NEW.KPHI.CF.S.0015.200817T0300Z-200817T0700Z/
Ocean-Coastal Ocean-
1052 PM EDT Sun Aug 16 2020
...COASTAL FLOOD ADVISORY WILL EXPIRE AT 11 PM EDT THIS EVENING...
...LINGERING MINOR FLOODING ALONG BARNEGAT BAY OVERNIGHT...
* WHAT...Up to a half foot of inundation above ground level is
expected in low-lying areas near shorelines and tidal waterways.
* WHERE...Barnegat Bay and the tidal waterways that flow into it.
* WHEN...Until 3:00 AM Monday.
* IMPACTS...Minor roadway flooding is possible.
$$
DEZ003-004-170700-
/O.EXP.KPHI.CF.Y.0020.000000T0000Z-200817T0300Z/
/O.NEW.KPHI.CF.S.0015.200817T0300Z-200817T0700Z/
Inland Sussex-Delaware Beaches-
1052 PM EDT Sun Aug 16 2020
...COASTAL FLOOD ADVISORY WILL EXPIRE AT 11 PM EDT THIS EVENING...
...LINGERING MINOR FLOODING ALONG LITTLE ASSAWOMAN BAY
OVERNIGHT...
* WHAT...Up to a half foot of inundation above ground level is
expected in low-lying areas near shorelines and tidal waterways.
* WHERE...Little Assawoman Bay and the tidal waterways that flow
into it.
* WHEN...Until 3:00 AM Monday.
* IMPACTS...Minor roadway flooding is possible.
&&
$$
NJZ014-027-170400-
/O.EXP.KPHI.CF.Y.0020.000000T0000Z-200817T0300Z/
Eastern Monmouth-Southeastern Burlington-
1052 PM EDT Sun Aug 16 2020
...COASTAL FLOOD ADVISORY WILL EXPIRE AT 11 PM EDT THIS EVENING...
Water levels will continue to decrease overnight. The Coastal
Flood Advisory will expire at 11:00 PM.
$$
NJZ021>025-170400-
/O.EXP.KPHI.CF.Y.0020.000000T0000Z-200817T0300Z/
Cumberland-Atlantic-Cape May-Atlantic Coastal Cape May-
Coastal Atlantic-
1052 PM EDT Sun Aug 16 2020
...COASTAL FLOOD ADVISORY WILL EXPIRE AT 11 PM EDT THIS EVENING...
Water levels will continue to decrease overnight. The Coastal
Flood Advisory will expire at 11:00 PM.
$$
DEZ002-170400-
/O.EXP.KPHI.CF.Y.0020.000000T0000Z-200817T0300Z/
Kent-
1052 PM EDT Sun Aug 16 2020
...COASTAL FLOOD ADVISORY WILL EXPIRE AT 11 PM EDT THIS EVENING...
Water levels will continue to decrease overnight. The Coastal
Flood Advisory will expire at 11:00 PM.
$$
DEZ001-NJZ016-170400-
/O.CON.KPHI.CF.Y.0020.000000T0000Z-200817T0400Z/
New Castle-Salem-
1052 PM EDT Sun Aug 16 2020
...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT EDT
TONIGHT...
* WHAT...Up to one foot of inundation above ground level is is
expected in low-lying areas near shorelines and tidal waterways.
* WHERE...Tidal areas in New Castle County, Delaware and Salem
County, New Jersey.
* WHEN...Until midnight.
* IMPACTS...At this level, flooding begins on the most vulnerable
roads along tidal waterways. Some partial or full road closures
are possible.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Coastal Flood Advisory means that minor tidal flooding is
expected. Minor tidal flooding often results in some road
closures. Usually, the most vulnerable roadways will flood.
Do not leave your vehicle at a location that is prone to tidal
flooding. Do not drive your vehicle through flood waters. The
water may be deeper than you think it is. You will be putting
yourself in danger and your vehicle may be damaged, leading to
costly repairs.
Visit the Advanced Hydrologic Prediction Service at
water.weather.gov/ahps for additional water level and flood impact
information for your local tide gauge.
&&
Time of high total tides are approximate to the nearest hour.
Delaware River at Reedy Point
MLLW Categories - Minor 7.2 ft, Moderate 8.2 ft, Major 9.2 ft
MHHW Categories - Minor 1.4 ft, Moderate 2.4 ft, Major 3.4 ft
Total Total Departure
Day/Time Tide Tide from Norm Flood
ft MLLW ft MHHW ft Impact
-------- --------- --------- --------- --------
17/11 AM 6.9 1.1 1.5 None
17/11 PM 7.6 1.8 1.0 Minor
18/11 AM 6.1 0.3 0.5 None
19/12 AM 7.1 1.3 0.4 None
19/12 PM 6.0 0.2 0.2 None
&&
$$
NJZ017>019-PAZ070-071-106-170700-
/O.CON.KPHI.CF.Y.0020.000000T0000Z-200817T0700Z/
Gloucester-Camden-Northwestern Burlington-Delaware-Philadelphia-
Lower Bucks-
1052 PM EDT Sun Aug 16 2020
...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 3 AM EDT
MONDAY...
* WHAT...Up to one foot of inundation above ground level is
expected in low-lying areas near shorelines and tidal waterways.
* WHERE...The tidal Delaware River and its tidal tributaries.
* WHEN...Until 3:00 AM Monday.
* IMPACTS...At this level, flooding begins on the most vulnerable
roads along 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 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
-------- --------- --------- --------- --------
17/01 AM 8.4 1.7 1.3 Minor
17/01 PM 7.3 0.6 1.3 None
18/01 AM 8.4 1.7 1.1 Minor
18/02 PM 7.1 0.4 0.9 None
19/02 AM 8.3 1.6 0.9 Minor
19/03 PM 7.1 0.4 0.7 None
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
-------- --------- --------- --------- --------
17/01 AM 9.5 1.8 1.5 Minor
17/02 PM 8.4 0.7 1.5 None
18/02 AM 9.4 1.7 1.2 Minor
18/03 PM 8.4 0.7 1.2 None
19/03 AM 9.5 1.8 1.1 Minor
19/04 PM 8.5 0.8 1.0 None
&&
$$
Iovino2 follow-up statements
538
WHUS41 KPHI 170356
CFWPHI
Coastal Hazard Message
National Weather Service Mount Holly NJ
1156 PM EDT Sun Aug 16 2020
DEZ001-NJZ016-170500-
/O.EXP.KPHI.CF.Y.0020.000000T0000Z-200817T0400Z/
New Castle-Salem-
1156 PM EDT Sun Aug 16 2020
...COASTAL FLOOD ADVISORY WILL EXPIRE AT MIDNIGHT EDT TONIGHT...
Water levels will continue to decrease overnight. The Coastal
Flood Advisory will expire at midnight.
$$
NJZ017>019-PAZ070-071-106-170700-
/O.CON.KPHI.CF.Y.0020.000000T0000Z-200817T0700Z/
Gloucester-Camden-Northwestern Burlington-Delaware-Philadelphia-
Lower Bucks-
1156 PM EDT Sun Aug 16 2020
...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 3 AM EDT
MONDAY...
* WHAT...Up to one foot of inundation above ground level is
expected in low-lying areas near shorelines and tidal waterways.
* WHERE...The tidal Delaware River and its tidal tributaries.
* WHEN...Until 3:00 AM Monday.
* IMPACTS...At this level, flooding begins on the most vulnerable
roads along 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 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
-------- --------- --------- --------- --------
17/01 AM 8.4 1.7 1.3 Minor
17/01 PM 7.3 0.6 1.3 None
18/01 AM 8.4 1.7 1.1 Minor
18/02 PM 7.1 0.4 0.9 None
19/02 AM 8.3 1.6 0.9 Minor
19/03 PM 7.1 0.4 0.7 None
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
-------- --------- --------- --------- --------
17/01 AM 9.5 1.8 1.5 Minor
17/02 PM 8.4 0.7 1.5 None
18/02 AM 9.4 1.7 1.2 Minor
18/03 PM 8.4 0.7 1.2 None
19/03 AM 9.5 1.8 1.1 Minor
19/04 PM 8.5 0.8 1.0 None
&&
$$
NJZ020-026-170700-
/O.CON.KPHI.CF.S.0015.000000T0000Z-200817T0700Z/
Ocean-Coastal Ocean-
1156 PM EDT Sun Aug 16 2020
...LINGERING MINOR FLOODING ALONG BARNEGAT BAY OVERNIGHT...
* WHAT...Up to a half foot of inundation above ground level is
expected in low-lying areas near shorelines and tidal waterways.
* WHERE...Barnegat Bay and the tidal waterways that flow into it.
* WHEN...Until 3:00 AM Monday.
* IMPACTS...Minor roadway flooding is possible.
$$
DEZ003-004-170700-
/O.CON.KPHI.CF.S.0015.000000T0000Z-200817T0700Z/
Inland Sussex-Delaware Beaches-
1156 PM EDT Sun Aug 16 2020
...LINGERING MINOR FLOODING ALONG LITTLE ASSAWOMAN BAY
OVERNIGHT...
* WHAT...Up to a half foot of inundation above ground level is
expected in low-lying areas near shorelines and tidal waterways.
* WHERE...Little Assawoman Bay and the tidal waterways that flow
into it.
* WHEN...Until 3:00 AM Monday.
* IMPACTS...Minor roadway flooding is possible.
$$
Iovino657 WHUS41 KPHI 170654 CFWPHI Coastal Hazard Message National Weather Service Mount Holly NJ 254 AM EDT Mon Aug 17 2020 NJZ017>019-PAZ070-071-106-170800- /O.EXP.KPHI.CF.Y.0020.000000T0000Z-200817T0700Z/ Gloucester-Camden-Northwestern Burlington-Delaware-Philadelphia- Lower Bucks- 254 AM EDT Mon Aug 17 2020 ...COASTAL FLOOD ADVISORY WILL EXPIRE AT 3 AM EDT EARLY THIS MORNING... Water levels will continue to decrease early this morning. The Coastal Flood Advisory will expire at 3:00 AM. $$ NJZ020-026-170800- /O.EXP.KPHI.CF.S.0015.000000T0000Z-200817T0700Z/ Ocean-Coastal Ocean- 254 AM EDT Mon Aug 17 2020 ...LINGERING MINOR FLOODING ALONG BARNEGAT BAY HAS ENDED... Water levels will continue to decrease early this morning. The lingering minor flooding along Barnegat Bay and the tidal waterways that flow into it has ended. $$ DEZ003-004-170800- /O.EXP.KPHI.CF.S.0015.000000T0000Z-200817T0700Z/ Inland Sussex-Delaware Beaches- 254 AM EDT Mon Aug 17 2020 ...LINGERING MINOR FLOODING ALONG LITTLE ASSAWOMAN BAY HAS ENDED... Water levels will continue to decrease early this morning. The lingering minor flooding along Little Assawoman Bay and the tidal waterways that flow into it has ended. $$ Iovino
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 17, 5:08 AM EDT | Coastal Flood Advisory | PHI | Kent, New Castle, Sussex | 23 hr |
| Aug 17, 10:44 AM EDT | Rip Current Statement | PHI | Sussex | 11 hr |
| Aug 17, 5:38 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 37 min |
| Aug 17, 6:16 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 16 min |
| Aug 17, 6:06 PM EDT | Special Weather Statement | PHI | Hunterdon | 39 min |
Nearby
Coastal Flood Statements in Delaware, 2020Coastal Flood Statements in New Jersey, 2020Every coastal flood statement in 2020
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.