Alert archive / Delaware / Coastal Flood Statements in 2021
Coastal Flood Statement 6, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this coastal flood statement at Sep 1, 2021, 10:23 PM EDT for Sussex County, Delaware; Ocean County, New Jersey. It was in force for 13 hr.
The area
The counties it named.
The facts
- Issued
- Sep 1, 2021, 10:23 PM EDT (02:23 UTC)
- Expired
- Sep 2, 2021, 11:43 AM EDT
- In force
- 13 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 02:27 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, 2.4 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
- 939 J/kg
- Mixed-layer CIN
- -14 J/kg
- Mixed-layer LCL
- 879 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 83 m²/s²
- 0-3 km storm-relative helicity
- 105 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.5
The text
As transmitted.
957 WHUS41 KPHI 020223 CFWPHI Coastal Hazard Message National Weather Service Mount Holly NJ 1023 PM EDT Wed Sep 1 2021 NJZ026-021530- /O.NEW.KPHI.CF.S.0006.210902T0223Z-210902T2200Z/ /O.CON.KPHI.RP.S.0006.000000T0000Z-210903T0000Z/ Coastal Ocean- 1023 PM EDT Wed Sep 1 2021 ...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH THURSDAY EVENING... * WHAT...For the High Rip Current Risk, dangerous rip currents. For the coastal flood statement, 1 to 2 feet of inundation above ground level in low- lying areas near shorelines and tidal waterways. * WHERE...Coastal Ocean. * WHEN...For the High Rip Current Risk, through Thursday evening. For the coastal flood statement, through Thursday afternoon. * IMPACTS...Minor roadway flooding is possible. Rip currents can sweep even the best swimmers away from shore into deeper water. PRECAUTIONARY/PREPAREDNESS ACTIONS... Do not drive through flooded roadways. Entering the surf is discouraged. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help. && && $$ NJZ020-021530- /O.NEW.KPHI.CF.S.0006.210902T0223Z-210902T2200Z/ Ocean- 1023 PM EDT Wed Sep 1 2021 * WHAT...1 to 2 feet of inundation above ground level in low- lying areas near shorelines and tidal waterways of the northern Barnegat Bay. * WHERE...Ocean. * WHEN...Through Thursday afternoon. * IMPACTS...Minor roadway flooding is possible. PRECAUTIONARY/PREPAREDNESS ACTIONS... Do not drive through flooded roadways. && $$ DEZ003-004-021530- /O.NEW.KPHI.CF.S.0006.210902T0223Z-210902T2200Z/ Inland Sussex-Delaware Beaches- 1023 PM EDT Wed Sep 1 2021 * WHAT...1 to 2 feet 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 it. * WHEN...Through Thursday afternoon. * IMPACTS...Minor roadway flooding is possible. PRECAUTIONARY/PREPAREDNESS ACTIONS... Do not drive through flooded roadways. && && $$ NJZ014-024-025-021530- /O.CON.KPHI.RP.S.0006.000000T0000Z-210903T0000Z/ Eastern Monmouth-Atlantic Coastal Cape May-Coastal Atlantic- 1023 PM EDT Wed Sep 1 2021 ...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH THURSDAY EVENING... * WHAT...Dangerous rip currents. * WHERE...Atlantic Coastal Cape May, Coastal Atlantic and Eastern Monmouth. * WHEN...Through Thursday evening. * IMPACTS...Rip currents can sweep even the best swimmers away from shore into deeper water. PRECAUTIONARY/PREPAREDNESS ACTIONS... Entering the surf is discouraged. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help. && $$
2 follow-up statements
142
WHUS41 KPHI 021005
CFWPHI
URGENT - IMMEDIATE BROADCAST REQUESTED
Coastal Hazard Message
National Weather Service Mount Holly NJ
605 AM EDT Thu Sep 2 2021
NJZ015-019-PAZ106-021800-
/O.NEW.KPHI.CF.W.0003.210902T1100Z-210902T1800Z/
Mercer-Northwestern Burlington-Lower Bucks-
605 AM EDT Thu Sep 2 2021
...COASTAL FLOOD WARNING IN EFFECT UNTIL 2 PM EDT THIS
AFTERNOON...
* WHAT...One to two feet of inundation above ground level
expected in low-lying areas near shorelines and tidal
waterways.
* WHERE...In New Jersey, Mercer and Northwestern Burlington. In
Pennsylvania, Lower Bucks.
* WHEN...Until 2 PM EDT this afternoon.
* IMPACTS...At this level, flooding may become severe enough to
cause some structural damage along with widespread roadway
flooding near tidal waterways. Some locations may become
isolated by the flood waters.
* ADDITIONAL DETAILS...The unusually high water levels are the
result of the combination of high tide and excessive rainfall
runoff.
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 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
-------- --------- --------- --------- --------
02/12 PM 11.3 3.6 4.7 Major
03/12 AM 9.8 2.1 2.3 Minor
03/12 PM 7.4 -0.3 0.9 None
04/01 AM 8.4 0.7 0.7 None
04/01 PM 7.6 -0.1 0.7 None
05/02 AM 8.8 1.1 0.9 None
&&
$$
NJZ017-018-PAZ070-071-104-021800-
/O.NEW.KPHI.CF.W.0003.210902T1100Z-210902T1800Z/
Gloucester-Camden-Delaware-Philadelphia-Eastern Montgomery-
605 AM EDT Thu Sep 2 2021
...COASTAL FLOOD WARNING IN EFFECT UNTIL 2 PM EDT THIS
AFTERNOON...
* WHAT...One to two feet of inundation above ground level
expected in low-lying areas near shorelines and tidal
waterways.
* WHERE...In New Jersey, Gloucester and Camden. In Pennsylvania,
Delaware, Philadelphia and Eastern Montgomery.
* WHEN...Until 2 PM EDT this afternoon.
* IMPACTS...At this level, widespread roadway flooding occurs
along tidal waterways. Some roads become impassable. Minor
damage to vulnerable structures may begin to occur.
* ADDITIONAL DETAILS...The unusually high water levels are the
result of the combination of high tide and excessive rainfall
runoff.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Coastal Flood Warning means that moderate or major tidal
flooding is occurring or imminent. Be prepared for rising water
levels and take appropriate action to protect life and property.
Follow the recommendations of local emergency management
officials.
Do not drive your vehicle through flood waters. The water may be
deeper than you think it is. You will be putting yourself in
danger and your vehicle may be damaged, leading to costly
repairs.
Visit the Advanced Hydrologic Prediction Service at
water.weather.gov/ahps for additional water level and flood
impact information for your local tide gauge.
&&
Time of high total tides are approximate to the nearest hour.
Delaware River at Philadelphia
MLLW Categories - Minor 8.2 ft, Moderate 9.2 ft, Major 10.2 ft
MHHW Categories - Minor 1.5 ft, Moderate 2.5 ft, Major 3.5 ft
Total Total Departure
Day/Time Tide Tide from Norm Flood
ft MLLW ft MHHW ft Impact
-------- --------- --------- --------- --------
02/11 AM 9.3 2.6 3.5 Moderate
02/11 PM 7.6 0.9 0.8 None
03/12 PM 6.6 -0.1 0.7 None
04/12 AM 7.6 0.9 0.6 None
04/01 PM 6.9 0.2 0.8 None
05/01 AM 8.0 1.3 0.9 None
&&
$$
NJZ026-022315-
/O.CON.KPHI.CF.S.0006.000000T0000Z-210902T2200Z/
/O.CON.KPHI.RP.S.0006.000000T0000Z-210903T0000Z/
Coastal Ocean-
605 AM EDT Thu Sep 2 2021
...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH THIS EVENING...
* WHAT...For the High Rip Current Risk, dangerous rip currents.
For the Coastal Flood Statement, up to one foot of inundation
above ground level in low- lying areas near shorelines and tidal
waterways.
* WHERE...Coastal Ocean.
* WHEN...For the High Rip Current Risk, through this evening.
For the, until 6 PM EDT this evening.
* IMPACTS...Minor roadway flooding is possible. Rip currents can
sweep even the best swimmers away from shore into deeper water.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Do not drive through flooded roadways.
Entering the surf is discouraged. If caught in a rip current,
relax and float. Don't swim against the current. If able, swim in
a direction following the shoreline. If unable to escape, face
the shore and call or wave for help.
&&
$$
NJZ020-022200-
/O.CON.KPHI.CF.S.0006.000000T0000Z-210902T2200Z/
Ocean-
605 AM EDT Thu Sep 2 2021
* WHAT...Up to one foot of inundation above ground level in low-
lying areas near shorelines and tidal waterways for the northern
portions of Barnegat Bay.
* WHERE...Ocean.
* WHEN...Until 6 PM EDT this evening.
* IMPACTS...Minor roadway flooding is possible.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Do not drive through flooded roadways.
&&
$$
DEZ003-004-022200-
/O.CON.KPHI.CF.S.0006.000000T0000Z-210902T2200Z/
Inland Sussex-Delaware Beaches-
605 AM EDT Thu Sep 2 2021
* WHAT...Up to one foot of inundation above ground level in low-
lying areas near shorelines and tidal waterways. 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 it.
* WHEN...Until 6 PM EDT this evening.
* IMPACTS...Minor roadway flooding is possible.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Do not drive through flooded roadways.
&&
$$
NJZ014-024-025-022315-
/O.CON.KPHI.RP.S.0006.000000T0000Z-210903T0000Z/
Eastern Monmouth-Atlantic Coastal Cape May-Coastal Atlantic-
605 AM EDT Thu Sep 2 2021
...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH THIS EVENING...
* WHAT...Dangerous rip currents.
* WHERE...Atlantic Coastal Cape May, Coastal Atlantic and
Eastern Monmouth.
* WHEN...Through this evening.
* IMPACTS...Rip currents can sweep even the best swimmers away
from shore into deeper water.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Entering the surf is discouraged. If caught in a rip current,
relax and float. Don't swim against the current. If able, swim in
a direction following the shoreline. If unable to escape, face
the shore and call or wave for help.
&&
$$
Staarmann263 WHUS41 KPHI 021543 CFWPHI Coastal Hazard Message National Weather Service Mount Holly NJ 1143 AM EDT Thu Sep 2 2021 NJZ015-017>019-PAZ070-071-104-106-021645- /O.CAN.KPHI.CF.W.0003.000000T0000Z-210902T1800Z/ Mercer-Gloucester-Camden-Northwestern Burlington-Delaware- Philadelphia-Eastern Montgomery-Lower Bucks- 1143 AM EDT Thu Sep 2 2021 ...COASTAL FLOOD WARNING IS CANCELLED... Water levels are not expected to reach flood criteria therefore the coastal flood warning has been cancelled. However, freshwater flooding will continue to occur along portions of the Delaware River through the day so be sure to heed any road closures. $$ NJZ026-030000- /O.CAN.KPHI.CF.S.0006.000000T0000Z-210902T2200Z/ /O.CON.KPHI.RP.S.0006.000000T0000Z-210903T0000Z/ Coastal Ocean- 1143 AM EDT Thu Sep 2 2021 ...HIGH RIP CURRENT RISK REMAINS IN EFFECT UNTIL 8 PM EDT THIS EVENING... * WHAT...Dangerous rip currents. * WHERE...Coastal Ocean. * WHEN...Until 8 PM EDT this evening. * IMPACTS...Rip currents can sweep even the best swimmers away from shore into deeper water. PRECAUTIONARY/PREPAREDNESS ACTIONS... Entering the surf is discouraged. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help. && $$ DEZ003-004-NJZ020-021645- /O.CAN.KPHI.CF.S.0006.000000T0000Z-210902T2200Z/ Inland Sussex-Delaware Beaches-Ocean- 1143 AM EDT Thu Sep 2 2021 ...COASTAL FLOOD STATEMENT IS CANCELLED... The Coastal Flood Statement has been cancelled as stronger offshore flow has allowed water lvls to evacuate the backbays. $$ NJZ014-024-025-030000- /O.CON.KPHI.RP.S.0006.000000T0000Z-210903T0000Z/ Eastern Monmouth-Atlantic Coastal Cape May-Coastal Atlantic- 1143 AM EDT Thu Sep 2 2021 ...HIGH RIP CURRENT RISK REMAINS IN EFFECT UNTIL 8 PM EDT THIS EVENING... * WHAT...Dangerous rip currents. * WHERE...Atlantic Coastal Cape May, Coastal Atlantic and Eastern Monmouth. * WHEN...Until 8 PM EDT this evening. * IMPACTS...Rip currents can sweep even the best swimmers away from shore into deeper water. PRECAUTIONARY/PREPAREDNESS ACTIONS... Entering the surf is discouraged. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help. && $$
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 1, 11:38 PM EDT | Areal Flood Warning | PHI | New Castle | 10 hr |
| Sep 2, 2:23 AM EDT | Areal Flood Warning | PHI | New Castle | 9 hr |
| Sep 1, 8:02 PM EDT | Flash Flood Warning | PHI | Middlesex, Morris, Somerset | 5 hr |
| Sep 1, 9:01 PM EDT | Flash Flood Warning | PHI | Burlington, Mercer, Middlesex, Monmouth, Ocean | 5 hr |
| Sep 1, 9:43 PM EDT | River Flood Warning | PHI | Mercer | 33 hr |
| Sep 1, 10:05 PM EDT | Flash Flood Warning | PHI | Morris, Somerset | 4 hr |
| Sep 1, 10:24 PM EDT | Flash Flood Warning | PHI | Burlington, Camden, Gloucester | 4 hr |
| Sep 1, 10:29 PM EDT | River Flood Warning | PHI | Hunterdon, Mercer | 49 hr |
| Sep 1, 10:32 PM EDT | River Flood Warning | PHI | Mercer | 31 hr |
| Sep 1, 10:35 PM EDT | River Flood Warning | PHI | Bergen, Morris, Passaic | 30 hr |
| Sep 1, 10:37 PM EDT | River Flood Warning | PHI | Morris, Passaic | 41 hr |
| Sep 1, 10:38 PM EDT | River Flood Warning | PHI | Morris, Somerset | 21 days |
| Sep 1, 10:47 PM EDT | Areal Flood Warning | PHI | Warren | 23 hr |
| Sep 1, 10:52 PM EDT | Areal Flood Warning | PHI | Hunterdon, Warren | 12 hr |
| Sep 2, 12:01 AM EDT | Areal Flood Warning | PHI | Hunterdon, Morris, Sussex, Warren | 40 hr |
| Sep 2, 12:28 AM EDT | Areal Flood Advisory | PHI | Atlantic, Burlington, Camden, Gloucester | 3 hr |
| Sep 2, 12:31 AM EDT | Areal Flood Advisory | PHI | Monmouth, Ocean | 2 hr |
| Sep 2, 1:38 AM EDT | Areal Flood Warning | PHI | Burlington, Mercer, Middlesex, Monmouth, Ocean | 4 hr |
| Sep 2, 1:52 AM EDT | Areal Flood Warning | PHI | Morris, Somerset | 13 hr |
| Sep 2, 2:29 AM EDT | Areal Flood Warning | PHI | Burlington, Camden, Gloucester | 5 hr |
| Sep 2, 3:52 AM EDT | Areal Flood Warning | PHI | Hunterdon, Mercer, Morris, Somerset, Warren | 8 hr |
| Sep 2, 3:53 AM EDT | Areal Flood Warning | PHI | Hunterdon, Mercer, Middlesex, Morris, Somerset | 8 hr |
| Sep 2, 4:00 AM EDT | River Flood Warning | PHI | Morris | 48 hr |
| Sep 2, 4:45 AM EDT | River Flood Warning | PHI | Hunterdon, Mercer | 37 hr |
| Sep 2, 4:45 AM EDT | River Flood Warning | PHI | Hunterdon, Warren | 37 hr |
| Sep 2, 4:45 AM EDT | River Flood Warning | PHI | Hunterdon | 37 hr |
| Sep 2, 4:45 AM EDT | River Flood Warning | PHI | Hunterdon | 33 hr |
| Sep 2, 4:45 AM EDT | River Flood Warning | PHI | Hunterdon, Mercer | 34 hr |
| Sep 2, 4:45 AM EDT | River Flood Warning | PHI | Sussex, Warren | 5 hr |
| Sep 2, 6:05 AM EDT | Coastal Flood Warning | PHI | Burlington, Camden, Gloucester, Mercer | 6 hr |
| Sep 2, 1:20 PM EDT | Areal Flood Warning | PHI | Middlesex | 21 hr |
| Sep 2, 6:44 PM EDT | Coastal Flood Advisory | PHI | Burlington, Camden, Gloucester | 7 hr |
Nearby
Coastal Flood Statements in Delaware, 2021Coastal 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.