Alert archive / Delaware / Coastal Flood Statements in 2020
Coastal Flood Statement 24, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this coastal flood statement at Nov 30, 2020, 2:01 PM EST for Sussex County, Delaware; Ocean County, New Jersey. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- Nov 30, 2020, 2:01 PM EST (19:01 UTC)
- Expired
- Nov 30, 2020, 4:44 PM EST
- In force
- 3 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 19:05 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, 7.0 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
- 2 J/kg
- Mixed-layer CIN
- -59 J/kg
- Mixed-layer LCL
- 524 m above ground
- 0-6 km bulk shear
- 68 kt
- 0-1 km storm-relative helicity
- 326 m²/s²
- 0-3 km storm-relative helicity
- 630 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
467 WHUS41 KPHI 301901 CFWPHI Coastal Hazard Message National Weather Service Mount Holly NJ 201 PM EST Mon Nov 30 2020 NJZ020-026-010100- /O.NEW.KPHI.CF.S.0024.201130T1901Z-201201T0100Z/ Ocean-Coastal Ocean- 201 PM EST Mon Nov 30 2020 ...MINOR FLOODING ALONG BARNEGAT BAY THROUGH THIS EVENING... * 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 8 PM EST this evening. * 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... Do not drive through flooded roadways. && $$ DEZ003-004-010100- /O.NEW.KPHI.CF.S.0024.201130T1901Z-201201T0100Z/ Inland Sussex-Delaware Beaches- 201 PM EST Mon Nov 30 2020 ...MINOR FLOODING ALONG LITTLE ASSAWOMAN BAY THROUGH THIS EVENING... * WHAT...Up to one half foot of inundation above ground level in low- lying areas near shorelines and tidal waterways. * WHERE...Little Assawoman Bay and the tidal waterways that flow into them. * WHEN...Until 8 PM EST this evening. * IMPACTS...Minor roadway flooding is possible. PRECAUTIONARY/PREPAREDNESS ACTIONS... Do not drive through flooded roadways. && $$ Meola
2 follow-up statements
326
WHUS41 KPHI 301918
CFWPHI
Coastal Hazard Message
National Weather Service Mount Holly NJ
218 PM EST Mon Nov 30 2020
NJZ017>019-PAZ070-071-106-302200-
/O.NEW.KPHI.CF.Y.0035.201130T1918Z-201130T2200Z/
Gloucester-Camden-Northwestern Burlington-Delaware-Philadelphia-
Lower Bucks-
218 PM EST Mon Nov 30 2020
...COASTAL FLOOD ADVISORY IN EFFECT UNTIL 5 PM EST THIS
AFTERNOON...
* WHAT...Up to one foot of inundation above ground level in low-
lying areas near shorelines and tidal waterways.
* WHERE...The tidal Delaware River upstream from the Commodore
Barry Bridge, and its tidal tributaries.
* WHEN...Until 5:00 PM this afternoon.
* 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
-------- --------- --------- --------- --------
30/02 PM 8.8 2.1 2.4 Minor
01/02 AM 6.5 -0.2 1.0 None
01/02 PM 7.3 0.6 1.0 None
02/03 AM 5.7 -1.0 0.4 None
02/03 PM 6.6 -0.1 0.3 None
03/03 AM 5.2 -1.5 0.0 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
-------- --------- --------- --------- --------
30/02 PM 9.8 2.1 2.1 Minor
01/03 AM 7.6 -0.1 0.7 None
01/03 PM 8.8 1.1 1.0 None
02/03 AM 6.9 -0.8 0.2 None
02/03 PM 8.2 0.5 0.3 None
03/04 AM 6.5 -1.2 -0.1 None
&&
$$
NJZ020-026-010100-
/O.CON.KPHI.CF.S.0024.000000T0000Z-201201T0100Z/
Ocean-Coastal Ocean-
218 PM EST Mon Nov 30 2020
...MINOR FLOODING ALONG BARNEGAT BAY THROUGH THIS EVENING...
* WHAT...Up to one half foot of inundation above ground level in
low- lying areas near shorelines and tidal waterways.
* WHERE...Barnegat Bay and the tidal waterways that flow into it.
* WHEN...Until 8 PM EST this evening.
* IMPACTS...At this level, flooding begins on the most vulnerable
roads in coastal and bayside communities, and along inland
tidal waterways. Some partial or full road closures are
possible.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Do not drive through flooded roadways.
$$
DEZ003-004-010100-
/O.CON.KPHI.CF.S.0024.000000T0000Z-201201T0100Z/
Inland Sussex-Delaware Beaches-
218 PM EST Mon Nov 30 2020
...MINOR FLOODING ALONG THE BACK BAYS THROUGH THIS EVENING...
* WHAT...Up to one half foot of inundation above ground level in
low- lying areas near shorelines and tidal waterways.
* WHERE...Little Assawoman Bay, Rehoboth Bay, Indian River Inlet
Bay and the tidal waterways that flow into them.
* WHEN...Until 8 PM EST this evening.
* IMPACTS...Minor roadway flooding is possible.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Do not drive through flooded roadways.
$$687 WHUS41 KPHI 302144 CFWPHI Coastal Hazard Message National Weather Service Mount Holly NJ 444 PM EST Mon Nov 30 2020 NJZ017>019-PAZ070-071-106-302245- /O.CAN.KPHI.CF.Y.0035.000000T0000Z-201130T2200Z/ Gloucester-Camden-Northwestern Burlington-Delaware-Philadelphia- Lower Bucks- 444 PM EST Mon Nov 30 2020 ...COASTAL FLOOD ADVISORY IS CANCELLED... Tide levels continue to decrease. As a result, the Coastal Flood Advisory has been cancelled for the tidal Delaware River and its tributaries. $$ DEZ003-004-NJZ020-026-302245- /O.CAN.KPHI.CF.S.0024.000000T0000Z-201201T0100Z/ Inland Sussex-Delaware Beaches-Ocean-Coastal Ocean- 444 PM EST Mon Nov 30 2020 ...LINGERING MINOR TIDAL FLOODING IS ENDING... Tide levels continue to decrease on the back bays of New Jersey and Delaware. The lingering minor flooding is coming 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 30, 11:35 AM EST | River Flood Warning | PHI | New Castle | 11 hr |
| Nov 30, 12:15 PM EST | Areal Flood Advisory | PHI | New Castle | 3 hr |
| Nov 30, 2:41 PM EST | Severe Thunderstorm Warning | PHI | New Castle | 49 min |
| Nov 30, 2:48 PM EST | Areal Flood Warning | PHI | New Castle | 8 hr |
| Nov 30, 3:01 PM EST | Severe Thunderstorm Warning | PHI | New Castle | 44 min |
| Nov 30, 3:04 PM EST | Severe Thunderstorm Warning | PHI | Kent, New Castle | 56 min |
| Nov 30, 3:21 PM EST | Tornado Warning | PHI | Kent | 24 min |
| Nov 30, 3:47 PM EST | Tornado Warning | PHI | Kent | 28 min |
| Nov 30, 5:24 PM EST | River Flood Warning | PHI | New Castle | 5 hr |
| Nov 30, 5:39 PM EST | River Flood Warning | PHI | New Castle | 4 hr |
| Nov 30, 12:52 PM EST | Areal Flood Advisory | PHI | Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 5 more | 92 min |
| Nov 30, 1:28 PM EST | Areal Flood Advisory | PHI | Hunterdon, Warren | 2 hr |
| Nov 30, 2:01 PM EST | Areal Flood Warning | PHI | Hunterdon, Mercer, Middlesex, Somerset | 9 hr |
| Nov 30, 2:18 PM EST | Coastal Flood Advisory | PHI | Burlington, Camden, Gloucester | 2 hr |
| Nov 30, 2:34 PM EST | Special Weather Statement | PHI | Morris, Sussex | 56 min |
| Nov 30, 3:26 PM EST | Areal Flood Warning | PHI | Hunterdon, Warren | 4 hr |
| Nov 30, 3:37 PM EST | Special Marine Warning | PHI | 38 min | |
| Nov 30, 3:43 PM EST | Severe Thunderstorm Warning | PHI | Hunterdon, Warren | 47 min |
| Nov 30, 3:53 PM EST | Areal Flood Warning | PHI | Hunterdon, Morris, Somerset, Sussex, Warren | 16 hr |
| Nov 30, 3:53 PM EST | Tornado Warning | PHI | Hunterdon | 13 min |
| Nov 30, 3:58 PM EST | Small Craft Advisory | PHI | 56 hr | |
| Nov 30, 4:17 PM EST | Areal Flood Warning | PHI | Camden, Hunterdon, Mercer, Middlesex | 10 hr |
| Nov 30, 4:49 PM EST | Severe Thunderstorm Warning | PHI | Camden, Cumberland, Gloucester, Salem | 41 min |
| Nov 30, 5:05 PM EST | Special Marine Warning | PHI | 40 min | |
| Nov 30, 5:29 PM EST | Severe Thunderstorm Warning | PHI | Mercer, Middlesex, Somerset | 46 min |
| Nov 30, 5:36 PM EST | River Flood Warning | PHI | Hunterdon, Somerset | 7 hr |
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.