Alert archive / New Jersey / Coastal Flood Warnings in 2018
Coastal Flood Warning 6, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this coastal flood warning at Apr 16, 2018, 2:45 PM EDT for 4 counties in New Jersey; Bucks County, Delaware County, Philadelphia County, Pennsylvania. It was in force for 3 hr. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Apr 16, 2018, 2:45 PM EDT (18:45 UTC)
- Expired
- Apr 16, 2018, 6:00 PM EDT
- In force
- 3 hr
- Issued by
- NWS Philadelphia/Mount Holly
Counties Burlington County, NJ, Camden County, NJ, Gloucester County, NJ, Mercer County, NJ, Bucks County, PA, Delaware County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 52 km from the middle of the area, began a volume at 18:45 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 16, 4:15 PM EDT | FLOOD | Burlington, NJ | THE DELAWARE RIVER CRESTED ITS BANKS ALONG THE RIVERFRONT PROMENADE. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 6.8 hours before the alert went out and 206 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
- 7 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 391 m above ground
- 0-6 km bulk shear
- 59 kt
- 0-1 km storm-relative helicity
- 902 m²/s²
- 0-3 km storm-relative helicity
- 990 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.9
The text
As transmitted.
525
WHUS41 KPHI 161845
CFWPHI
URGENT - IMMEDIATE BROADCAST REQUESTED
Coastal Hazard Message
National Weather Service Mount Holly NJ
245 PM EDT Mon Apr 16 2018
NJZ015-017>019-PAZ070-071-106-162200-
/O.UPG.KPHI.CF.Y.0011.000000T0000Z-180416T2100Z/
/O.NEW.KPHI.CF.W.0006.180416T1845Z-180416T2200Z/
Mercer-Gloucester-Camden-Northwestern Burlington-Delaware-
Philadelphia-Lower Bucks-
245 PM EDT Mon Apr 16 2018
...COASTAL FLOOD WARNING IN EFFECT UNTIL 6 PM EDT THIS EVENING...
The National Weather Service in Mount Holly has issued a Coastal
Flood Warning, which is in effect until 6 PM EDT this evening.
The Coastal Flood Advisory is no longer in effect.
* LOCATIONS...The tidal Delaware River from Commodore Barry
Bridge to Trenton.
* COASTAL FLOODING...Moderate flooding around the time of high
tide this afternoon.
* TIMING...High tide at Philadelphia occurs just before 3 PM this
afternoon. High tide at Trenton occurs around 4 PM.
* SURGE...Around 3 feet above the astronomical tide.
* IMPACTS...Roadway closures due to high water will occur. Minor
property damage is possible in areas along the river that are
prone to tidal flooding.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Coastal Flood Warning means that flooding is occurring or
imminent. Coastal residents in the warned area should be alert
for rising water...and take appropriate action to protect life
and property.
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.
Burlington NJ
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
-------- --------- --------- --------- --------
16/04 PM 10.5 2.7 2.7 Moderate
17/04 AM 9.5 1.8 1.2 Minor
17/04 PM 8.5 0.8 0.7 None
18/05 AM 8.5 0.8 0.0 None
18/05 PM 7.6 -0.1 -0.1 None
19/05 AM 8.7 1.0 0.1 None
Philadelphia PA
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
-------- --------- --------- --------- --------
16/03 PM 9.5 2.8 3.0 Moderate
17/03 AM 8.3 1.6 1.2 Minor
17/04 PM 6.7 0.0 0.2 None
18/04 AM 6.9 0.2 -0.3 None
18/04 PM 5.8 -0.9 -0.6 None
19/05 AM 7.0 0.3 -0.2 None
&&
$$
MDZ015-019-020-170100-
/O.CON.KPHI.CF.Y.0011.000000T0000Z-180417T0100Z/
Queen Annes-Talbot-Caroline-
245 PM EDT Mon Apr 16 2018
...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 9 PM EDT THIS
EVENING...
* LOCATIONS...Eastern shore of the Maryland Chesapeake Bay in
Queen Annes, Talbot and Caroline Counties.
* COASTAL FLOODING...Minor coastal flooding around the time of
high tide through this evening.
* TIMING...High tide at Cambridge occurs just before 530 PM this
afternoon. High tide occurs several hours later farther north
along the eastern shore of the Chesapeake Bay and the upstream
tidal tributaries.
* SURGE...Around 2 feet above the astronomical tide.
* IMPACTS...Localized roadway flooding is expected and some
roads may be closed due to high water.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Coastal Flood Advisory means that minor tidal flooding is
expected. Minor Tidal flooding often results in some road
closures. Usually...the most vulnerable roadways will flood.
Do not leave your vehicle at a location that is prone to tidal
flooding. Do not drive your vehicle through flood waters. The
water may be deeper than you think it is. You will be putting
yourself in danger and your vehicle may be damaged...leading to
costly repairs.
Visit the Advanced Hydrologic Prediction Service at
water.weather.gov/ahps for additional water level and flood
impact information for your local tide gauge.
&&
Time of high total tides are approximate to the nearest hour.
Cambridge MD
MLLW Categories - Minor 3.5 FT, Moderate 4.5 FT, Major 5.5 FT
MHHW Categories - Minor 1.5 FT, Moderate 2.5 FT, Major 3.5 FT
Total Total Departure
Day/Time Tide Tide from Norm Flood
ft MLLW ft MHHW ft Impact
-------- --------- --------- --------- --------
16/05 PM 3.8 1.8 2.6 Minor
17/06 AM 2.7 0.7 1.3 None
17/06 PM 2.0 -0.0 0.7 None
18/06 AM 2.1 0.1 0.2 None
18/07 PM 1.5 -0.5 -0.1 None
19/07 AM 2.0 -0.0 -0.1 None
&&
$$
MDZ008-012-170300-
/O.CON.KPHI.CF.Y.0012.180416T2000Z-180417T0300Z/
Cecil-Kent MD-
245 PM EDT Mon Apr 16 2018
...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 11 PM EDT THIS
EVENING...
* LOCATIONS...Northeastern shore of the Maryland Chesapeake Bay.
* COASTAL FLOODING...Minor coastal flooding around the time of
high tide this evening.
* TIMING...High tide at Tolchester Beach occurs just before 830
PM this evening. High tide occurs several hours later along
the northern shore of the Chesapeake Bay and the upstream
tidal tributaries.
* SURGE...2 to 2.5 feet above the astronomical tide.
* IMPACTS...Localized roadway flooding is expected and some
roads may be closed due to high water.
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.
Chesapeake City MD
MLLW Categories - Minor 5.5 FT, Moderate 6.5 FT, Major 7.5 FT
MHHW Categories - Minor 2.2 FT, Moderate 3.2 FT, Major 4.2 FT
Total Total Departure
Day/Time Tide Tide from Norm Flood
ft MLLW ft MHHW ft Impact
-------- --------- --------- --------- --------
16/12 PM 5.6 2.3 2.3 Minor
17/12 AM 5.1 1.8 2.0 None
17/12 PM 4.6 1.3 1.2 None
18/01 AM 3.4 0.1 0.3 None
18/01 PM 3.3 -0.0 -0.1 None
19/01 AM 2.8 -0.5 -0.3 None
Tolchester Beach MD
MLLW Categories - Minor 3.5 FT, Moderate 4.5 FT, Major 5.5 FT
MHHW Categories - Minor 1.8 FT, Moderate 2.8 FT, Major 3.8 FT
Total Total Departure
Day/Time Tide Tide from Norm Flood
ft MLLW ft MHHW ft Impact
-------- --------- --------- --------- --------
16/08 PM 4.0 2.3 2.7 Minor
17/08 AM 3.4 1.7 1.6 None
17/09 PM 1.9 0.2 0.6 None
18/09 AM 1.9 0.2 0.1 None
18/09 PM 1.1 -0.6 -0.1 None
19/10 AM 1.7 -0.0 -0.1 None
&&
$$1 follow-up statement
816
WHUS41 KPHI 162200
CFWPHI
Coastal Hazard Message
National Weather Service Mount Holly NJ
600 PM EDT Mon Apr 16 2018
NJZ015-017>019-PAZ070-071-106-162300-
/O.EXP.KPHI.CF.W.0006.000000T0000Z-180416T2200Z/
Mercer-Gloucester-Camden-Northwestern Burlington-Delaware-
Philadelphia-Lower Bucks-
600 PM EDT Mon Apr 16 2018
...COASTAL FLOOD WARNING WILL EXPIRE AT 6 PM EDT THIS EVENING...
Waters are beginning to recede. Please continue to heed any road
closures in place. There is a chance a coastal flood advisory may
be needed for tomorrow morning's high tide. Stay tuned to the
latest forecasts.
&&
Time of high total tides are approximate to the nearest hour.
Burlington NJ
MLLW Categories - Minor 9.3 FT, Moderate 10.3 FT, Major 11.3 FT
MHHW Categories - Minor 1.6 FT, Moderate 2.6 FT, Major 3.6 FT
Total Total Departure
Day/Time Tide Tide from Norm Flood
ft MLLW ft MHHW ft Impact
-------- --------- --------- --------- --------
17/04 AM 9.6 1.9 1.3 Minor
17/04 PM 8.5 0.8 0.7 None
18/05 AM 8.6 0.9 0.1 None
18/05 PM 7.7 -0.0 0.0 None
19/05 AM 8.7 1.0 0.1 None
Philadelphia PA
MLLW Categories - Minor 8.2 FT, Moderate 9.2 FT, Major 10.2 FT
MHHW Categories - Minor 1.5 FT, Moderate 2.5 FT, Major 3.5 FT
Total Total Departure
Day/Time Tide Tide from Norm Flood
ft MLLW ft MHHW ft Impact
-------- --------- --------- --------- --------
17/03 AM 8.1 1.4 1.0 None
17/04 PM 6.8 0.1 0.3 None
18/04 AM 6.8 0.1 -0.4 None
18/04 PM 5.8 -0.9 -0.6 None
19/05 AM 7.0 0.3 -0.2 None
&&
$$
NJZ012>014-020-026-170600-
/O.EXB.KPHI.CF.Y.0012.180417T0000Z-180417T0600Z/
Middlesex-Western Monmouth-Eastern Monmouth-Ocean-Coastal Ocean-
600 PM EDT Mon Apr 16 2018
...COASTAL FLOOD ADVISORY IN EFFECT UNTIL 2 AM EDT TUESDAY...
The National Weather Service in Mount Holly has issued a Coastal
Flood Advisory, which is in effect until 2 AM EDT Tuesday.
* LOCATIONS...Northeastern shore of the Maryland Chesapeake Bay.
* COASTAL FLOODING...Minor coastal flooding around the time of
high tide this evening.
* TIMING...High tide at Tolchester Beach occurs just before 830
PM this evening. High tide occurs several hours later along
the northern shore of the Chesapeake Bay and the upstream
tidal tributaries.
* SURGE...1.5 to 2 feet above the astronomical tide.
* WAVES...6 to 10 feet.
* IMPACTS...Localized roadway flooding is expected and some
roads may be closed due to high water.
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.
Perth Amboy NJ
MLLW Categories - Minor 7.1 FT, Moderate 8.1 FT, Major 9.1 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
-------- --------- --------- --------- --------
16/09 PM 7.9 2.2 1.6 Minor
17/09 AM 6.0 0.3 0.4 None
17/10 PM 5.9 0.2 -0.4 None
18/10 AM 4.9 -0.8 -0.6 None
18/10 PM 5.9 0.2 -0.3 None
19/11 AM 5.6 -0.0 0.3 None
Sandy Hook NJ
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
-------- --------- --------- --------- --------
16/09 PM 7.5 2.3 1.7 Minor
17/10 AM 5.8 0.6 0.6 None
17/10 PM 5.7 0.5 -0.1 None
18/10 AM 4.7 -0.5 -0.4 None
18/11 PM 5.6 0.4 -0.2 None
19/11 AM 5.3 0.1 0.4 None
Manasquan NJ
MLLW Categories - Minor 5.7 FT, Moderate 6.7 FT, Major 7.7 FT
MHHW Categories - Minor 1.2 FT, Moderate 2.2 FT, Major 3.2 FT
Total Total Departure
Day/Time Tide Tide from Norm Flood
ft MLLW ft MHHW ft Impact
-------- --------- --------- --------- --------
16/09 PM 6.6 2.1 1.4 Minor
17/09 AM 5.1 0.6 0.4 None
17/10 PM 5.1 0.6 -0.2 None
18/10 AM 4.1 -0.4 -0.5 None
18/10 PM 4.8 0.3 -0.4 None
19/11 AM 4.4 -0.1 0.0 None
Barnegat Light NJ
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
-------- --------- --------- --------- --------
16/09 PM 4.3 1.8 1.5 Minor
17/09 AM 3.2 0.7 0.8 None
17/10 PM 3.1 0.6 0.2 None
18/10 AM 2.0 -0.5 -0.3 None
18/10 PM 2.6 0.1 -0.3 None
19/11 AM 2.2 -0.3 0.0 None
&&
$$
MDZ015-019-020-170100-
/O.CON.KPHI.CF.Y.0011.000000T0000Z-180417T0100Z/
Queen Annes-Talbot-Caroline-
600 PM EDT Mon Apr 16 2018
...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 9 PM EDT THIS
EVENING...
* LOCATIONS...Eastern shore of the Maryland Chesapeake Bay in
Queen Annes, Talbot, and Caroline Counties.
* COASTAL FLOODING...Minor coastal flooding around the time of
high tide through this evening.
* TIMING...High tide at Cambridge is occurring now. High tide
occurs several hours later farther north along the eastern
shore of the Chesapeake Bay and the upstream tidal
tributaries.
* SURGE...Around 2 feet above the astronomical tide.
* IMPACTS...Localized roadway flooding is expected and some
roads may be closed due to high water.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Coastal Flood Advisory means that minor tidal flooding is
expected. Minor Tidal flooding often results in some road
closures. Usually...the most vulnerable roadways will flood.
Do not leave your vehicle at a location that is prone to tidal
flooding. Do not drive your vehicle through flood waters. The
water may be deeper than you think it is. You will be putting
yourself in danger and your vehicle may be damaged...leading to
costly repairs.
Visit the Advanced Hydrologic Prediction Service at
water.weather.gov/ahps for additional water level and flood
impact information for your local tide gauge.
&&
Time of high total tides are approximate to the nearest hour.
Cambridge MD
MLLW Categories - Minor 3.5 FT, Moderate 4.5 FT, Major 5.5 FT
MHHW Categories - Minor 1.5 FT, Moderate 2.5 FT, Major 3.5 FT
Total Total Departure
Day/Time Tide Tide from Norm Flood
ft MLLW ft MHHW ft Impact
-------- --------- --------- --------- --------
16/05 PM 4.0 2.0 1.4 Minor
17/06 AM 3.9 1.9 1.3 Minor
17/06 PM 2.8 0.8 0.8 None
18/06 AM 2.4 0.4 0.2 None
18/07 PM 1.8 -0.2 -0.1 None
19/07 AM 2.2 0.2 -0.1 None
&&
$$
MDZ008-012-170300-
/O.CON.KPHI.CF.Y.0012.000000T0000Z-180417T0300Z/
Cecil-Kent MD-
600 PM EDT Mon Apr 16 2018
...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 11 PM EDT THIS
EVENING...
* LOCATIONS...Northeastern shore of the Maryland Chesapeake Bay.
* COASTAL FLOODING...Minor coastal flooding around the time of
high tide this evening.
* TIMING...High tide at Tolchester Beach occurs just before 830
PM this evening. High tide occurs several hours later along
the northern shore of the Chesapeake Bay and the upstream
tidal tributaries.
* SURGE...2 to 2.5 feet above the astronomical tide.
* IMPACTS...Localized roadway flooding is expected and some
roads may be closed due to high water.
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.
Chesapeake City MD
MLLW Categories - Minor 5.5 FT, Moderate 6.5 FT, Major 7.5 FT
MHHW Categories - Minor 2.2 FT, Moderate 3.2 FT, Major 4.2 FT
Total Total Departure
Day/Time Tide Tide from Norm Flood
ft MLLW ft MHHW ft Impact
-------- --------- --------- --------- --------
17/12 AM 4.4 1.1 1.3 None
17/12 PM 4.5 1.2 1.1 None
18/01 AM 3.4 0.1 0.3 None
18/01 PM 3.3 -0.0 -0.1 None
19/01 AM 2.9 -0.4 -0.2 None
19/02 PM 3.4 0.1 0.0 None
Tolchester Beach MD
MLLW Categories - Minor 3.5 FT, Moderate 4.5 FT, Major 5.5 FT
MHHW Categories - Minor 1.8 FT, Moderate 2.8 FT, Major 3.8 FT
Total Total Departure
Day/Time Tide Tide from Norm Flood
ft MLLW ft MHHW ft Impact
-------- --------- --------- --------- --------
16/08 PM 3.5 1.6 2.0 Minor
17/08 AM 3.1 1.4 1.3 None
17/09 PM 1.9 0.2 0.6 None
18/09 AM 1.9 0.2 0.1 None
18/09 PM 1.1 -0.6 -0.1 None
19/10 AM 1.8 0.1 0.0 None
&&
$$
CMSWhat forecasters said that day
The local office's own words before this coastal flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Philadelphia/Mount Holly wrote its last area forecast discussion before this coastal flood warning went out at Apr 16, 1:29 PM EDT, 1 hour 16 minutes earlier.
Area forecast discussion, Apr 16, 1:29 PM EDT, 1 hour 16 minutes before
Area Forecast Discussion
National Weather Service Mount Holly NJ
129 PM EDT Mon Apr 16 2018
.SYNOPSIS...
The low pressure system that brought storms and a cold front to the
Mid Atlantic this morning, will slowly propagate northeast away from
the region on Tuesday. Another area of low pressure organizing over
the Midwest will propagate towards New England on Thursday. As it
does so, our region will first see a warm front, followed quickly by
a cold front. Canadian high pressure will move into the area for
the weekend.
&&
.NEAR TERM /UNTIL 6 PM THIS EVENING/...
The steady moderate to heavy rainfall has moved out of the area
this morning, therefore the Flash Flood Watch was cancelled.
There will remain some residual flooding into this afternoon and
evening. Several Flood Warnings and Flood Advisories remain in
effect, so please see these statements for the latest updates.
A warm front remains in place across basically the I-95
corridor early this afternoon. Its parent low pressure system
has now moved to Chester and Lancaster counties in
Pennsylvanian. This low will continue to lift across eastern
Pennsylvania through the remainder of today, before lifting into
New York state through the late afternoon and into this evening.
As it does so, it will continue to lift the warm front across
the area, as well as pull the cold front across the area as
well.
As the low lifts north of the area and the fronts move across
the area, there will remain a chance for scattered showers and
thunderstorms through the afternoon as additional short
wave/vorticity impulses move across the area. However, most
places this afternoon will remain dry.
Winds will remain gusty 20 to 30 mph, with higher gusts reaching
30-40 mph at times into this afternoon. Directions will remain
northeast-easterly ahead of the warm front, then become more
south-southwesterly behind the warm front, before swinging to
west-southwest behind the cold front this afternoon.
&&
.SHORT TERM /6 PM THIS EVENING THROUGH 6 AM TUESDAY/...
By early this evening, low will be departing to the NE into NY
State into New England dragging a final surface trough through
the area. In addition, systems' upper low will still be centered
near western PA with the broad circulation continuing to spin
shortwaves through the area. The upshot of this is that mainly
cloudy skies with some continuing scattered showers are likely
to affect parts of the area at least into this evening and
likely through the overnight across the southern Poconos. In
fact as temperatures drop off into the low to mid 30s tonight
across the far north, any rain showers will change over to snow
showers with continuing cool, gusty, west winds. Temps will be a
bit warmer farther south with lows mainly in the upper 30s to
low 40s over SE PA through central, S NJ, and the Delmarva.
&&
.LONG TERM /TUESDAY THROUGH SUNDAY/...
Made few changes to the long term forecast in order to focus on the
ongoing weather tonight.
Fair weather is expected from Tuesday night into Wednesday as high
pressure arrives across the area. It will be a bit warmer than
Monday/Tuesday, but still slightly below normal for mid-April. Highs
will generally be in the mid/upper 50s north/west and low/mid 60s
south/east. These values will be 2 o 4 degrees below normal.
Another low pressure system will approach the area later Wednesday
and last into Thursday evening. The system will be progressive, so
even though the low is depicted by the models as being rather
strong, it will not have large window of opportunity when our area
will be in the warm sector, and thus have more moisture for
precipitation. We therefore have mostly chc pops in the fcst for Wed
night/Thu and slgt chc pops into Thu night. Temperatures will remain
mostly at or a little below normal this period. The warmest day will
be Thursday (near normal) with mid/upper 50s for highs across the
north and low/mid 60s over Delmarva and srn NJ.
High pressure from Canada builds in for late this week and into the
weekend. Mostly fair weather is expected with a continuation of
below normal temperatures.
&&
.AVIATION /17Z MONDAY THROUGH FRIDAY/...
The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG, KILG,
KMIV, KACY and surrounding areas.
Today...Conditions remain between MVFR and IFR early this
afternoon, and will remain so through much of the remainder of
the afternoon. However, by late this afternoon and into this
evening, we expect an improving trend to VFR. There will remain
a chance for scattered showers during the afternoon hours, with
an occasional thunderstorm possible. However, we will not
include thunderstorms at this time unless we see them on radar.
E/SE winds north of the warm front will shift to SW/W this
afternoon as the warm front and low pressure lift north of the
area. Winds speeds will be around 10 to 15 knots, with gusts to
around 20 to 30 knots for many locations. Potential for some
erratic winds/gusts around showers. Moderate confidence.
Tonight...mainly VFR. Moderate confidence.
Outlook...
Tuesday and Wednesday...Mostly VFR conditions are expected. A few
showers are possible, primarily for KABE and KRDG, which could lead
to brief reductions in the flight category. Moderate confidence.
Wednesday night and Thursday...Starting VFR, we may see conditions
lower as a warm front lifts through the area and precipitation moves
in. However, confidence is low at this time.
Thursday night and Friday...Mostly VFR expected behind a cold front
that will bring a shift to northwesterly winds and drier conditions.
High confidence.
&&
.MARINE...
We have extended the Gale Warning for the Delaware Bay and the
southern waters adjacent to Delaware, and also keep the Gale
Warning in place across the waters adjacent to New Jersey. While
many locations are not reaching gale force right now, as the low
pressure lifts to the north of the area and the cold front
slides through this afternoon, winds will likely increase again
to gale force for a period this afternoon.
The heaviest and steady rainfall is lifting through the northern
half of the New Jersey coastal waters, and behind this rainfall,
we expect scattered showers and possibly an occasional
thunderstorm through the remainder of the afternoon.
Tonight...A relative respite as winds should actually drop
below SCA levels this evening before starting to ramp back up
again overnight...likely to near or just below SCA levels by
early Tuesday.
Outlook...
Tuesday and Tuesday night...lingering elevated seas are possible on
the ocean waters through this time. Otherwise, winds should stay
below SCA criteria.
Wednesday and Thursday...Winds and seas are expected to be below SCA
criteria.
Thursday night and Friday...Winds and seas should increase once
again and may approach SCA criteria.
&&
.HYDROLOGY...
Flash Flood Watch will continue for now as heavy rain moves
through the area. Several Flood Advisories and Flood/Flash
Flood Warnings are being issued as well. Please see the latest
warnings and advisories for the latest information.
&&
.TIDES/COASTAL FLOODING...
130 PM Update: Coastal Flood Warnings have been allowed to
expire for coastal NJ and DE. Most tidal gauges captured minor
tidal flooding. However, the severity of flooding was
exacerbated by freshwater runoff from the heavy rain that
occurred with the morning high tide.
The Coastal Flood Warning for the upper Delaware Bay (New
Castle, DE and Salem, NJ counties) continues through 2 PM. Reedy
Point peaked at only one-tenth inch below moderate threshold
with the midday high tide.
The Coastal Flood Advisory for the tidal portion of the Delaware
River (including Philadelphia and Trenton) was originally only
valid through 3 PM but was extended through 5 PM since high tide
occurs at Philadelphia just before 3 PM and just after 4 PM at
Trenton.
A Coastal Flood Advisory was issued for the eastern and
northeastern shore of the Maryland Chesapeake Bay for this
afternoon and evening. Positive tidal anomalies about both
Tolchester and Cambridge tidal gauges have been increasing
steadily over the past few hours and has not been particularly
well forecast by models. Expect these surge values to remain
steady or even start to decrease heading toward the next high
tide (just after 5 PM at Cambridge and just after 8 PM at
Tolchester Beach) in conjunction with a wind shift from Sly to
Wly.
&&
.PHI WATCHES/WARNINGS/ADVISORIES...
PA...Coastal Flood Advisory until 5 PM EDT this afternoon for
PAZ070-071-106.
NJ...Coastal Flood Warning until 2 PM EDT this afternoon for NJZ016.
Coastal Flood Advisory until 5 PM EDT this afternoon for
NJZ015-017>019.
DE...Coastal Flood Warning until 2 PM EDT this afternoon for DEZ001.
MD...Coastal Flood Advisory until 11 PM EDT this evening for MDZ008-
012.
Coastal Flood Advisory until 9 PM EDT this evening for MDZ015-
019-020.
MARINE...Gale Warning until 5 PM EDT this afternoon for ANZ430-431-
450>455.
&&
Synopsis...Johnson
Near Term...Fitzsimmons/Robertson
Short Term...Fitzsimmons
Long Term...Johnson
Aviation...Fitzsimmons/Johnson/Robertson
Marine...Fitzsimmons/Johnson/Robertson
Hydrology...
Tides/Coastal Flooding...KleinHazardous weather outlook, Apr 16, 2:01 PM EDT, 44 minutes before
Hazardous Weather Outlook National Weather Service Mount Holly NJ 201 PM EDT Mon Apr 16 2018 NJZ008>010-012-013-016-PAZ102>105-171815- Morris-Hunterdon-Somerset-Middlesex-Western Monmouth-Salem- Eastern Chester-Western Montgomery-Eastern Montgomery-Upper Bucks- 201 PM EDT Mon Apr 16 2018 This Hazardous Weather Outlook is for central New Jersey, northern New Jersey, northwest New Jersey, southern New Jersey and southeast Pennsylvania. .DAY ONE...This Afternoon and Tonight. Excessive runoff from this morning's heavy rain will continue to cause flooding along creeks, streams, smaller river basins and in poor drainage areas this afternoon. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. NJZ015-017>019-PAZ070-071-106-171815- Mercer-Gloucester-Camden-Northwestern Burlington-Delaware- Philadelphia-Lower Bucks- 201 PM EDT Mon Apr 16 2018 ...COASTAL FLOOD ADVISORY IN EFFECT UNTIL 5 PM EDT THIS AFTERNOON... This Hazardous Weather Outlook is for central New Jersey, southern New Jersey and southeast Pennsylvania. .DAY ONE...This Afternoon and Tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Coastal Flood Advisory. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. DEZ001>004-NJZ001-007-014-020>027-PAZ054-055-060>062-101-171815- New Castle-Kent-Inland Sussex-Delaware Beaches-Sussex-Warren- Eastern Monmouth-Ocean-Cumberland-Atlantic-Cape May- Atlantic Coastal Cape May-Coastal Atlantic-Coastal Ocean- Southeastern Burlington-Carbon-Monroe-Berks-Lehigh-Northampton- Western Chester- 201 PM EDT Mon Apr 16 2018 This Hazardous Weather Outlook is for central Delaware, northern Delaware, southern Delaware, central New Jersey, northern New Jersey, southern New Jersey, east central Pennsylvania, northeast Pennsylvania and southeast Pennsylvania. .DAY ONE...This Afternoon and Tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. MDZ008-012-171815- Cecil-Kent MD- 201 PM EDT Mon Apr 16 2018 ...COASTAL FLOOD ADVISORY IN EFFECT UNTIL 11 PM EDT THIS EVENING... This Hazardous Weather Outlook is for northeast Maryland. .DAY ONE...This Afternoon and Tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Coastal Flood Advisory. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. MDZ015-019-020-171815- Queen Annes-Talbot-Caroline- 201 PM EDT Mon Apr 16 2018 ...COASTAL FLOOD ADVISORY IN EFFECT UNTIL 9 PM EDT THIS EVENING... This Hazardous Weather Outlook is for northeast Maryland. .DAY ONE...This Afternoon and Tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Coastal Flood Advisory. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. ANZ430-431-450>455-171815- Delaware Bay waters north of East Point NJ to Slaughter Beach DE- Delaware Bay waters south of East Point NJ to Slaughter Beach DE- Coastal waters from Sandy Hook to Manasquan Inlet NJ out 20 nm- Coastal waters from Manasquan Inlet to Little Egg Inlet NJ out 20 nm- Coastal waters from Little Egg Inlet to Great Egg Inlet NJ out 20 nm- Coastal waters from Great Egg Inlet to Cape May NJ out 20 nm- Coastal waters from Cape May NJ to Cape Henlopen DE out 20 nm- Coastal waters from Cape Henlopen to Fenwick Island DE out 20 nm- 201 PM EDT Mon Apr 16 2018 ...GALE WARNING IN EFFECT UNTIL 5 PM EDT THIS AFTERNOON... This Hazardous Weather Outlook is for Atlantic coastal waters and Delaware Bay Waters. .DAY ONE...This Afternoon and Tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Gale Warning. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
In the hours before
Local storm report, Apr 16, 9:43 AM EDT, 5 hours 2 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
943 AM EDT MON APR 16 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0730 AM FLASH FLOOD PHILADELPHIA 39.96N 75.14W
04/16/2018 PHILADELPHIA PA EMERGENCY MNGR
RESCUES AND STUCK VEHICLES REPORTED IN THE AREA OF
COBBS CREEK. COBBS CREEK EXCEEDED ITS FLOOD STAGE OF 7
FEET AT 730 AM AND CRESTED AT 7.09 FEET BEFORE QUICKLY
FALLING BACK BELOW FLOOD STAGE BY 8 AM.
&&
EVENT NUMBER PHI1800613
MEOLALocal storm report, Apr 16, 10:06 AM EDT, 4 hours 39 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1006 AM EDT MON APR 16 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0920 AM FLOOD PHILADELPHIA 39.96N 75.14W
04/16/2018 PHILADELPHIA PA EMERGENCY MNGR
FLOODING REPORTED ON INTERSTATE 95 AT THE ON RAMP NEAR
FRONT AND MARKET STREETS.
&&
EVENT NUMBER PHI1800614
JRKLocal storm report, Apr 16, 10:10 AM EDT, 4 hours 35 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1010 AM EDT MON APR 16 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0945 AM FLOOD SOUTH BRUNSWICK 40.40N 74.54W
04/16/2018 MIDDLESEX NJ LAW ENFORCEMENT
ROUTE 1 SOUTHBOUND CLOSED DUE TO FLOODING ON THE
ROADWAY.
&&
EVENT NUMBER PHI1800616
MEOLALocal storm report, Apr 16, 10:39 AM EDT, 4 hours 6 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1039 AM EDT MON APR 16 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1015 AM COASTAL FLOOD ATLANTIC CITY 39.36N 74.45W
04/16/2018 ATLANTIC NJ NEWSPAPER
WESTBOUND FAIRMONT AVENUE CLOSED AT TEXAS AVENUE DUE TO
FLOODING.
&&
EVENT NUMBER PHI1800617
MEOLALocal storm report, Apr 16, 11:20 AM EDT, 3 hours 25 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1120 AM EDT MON APR 16 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0951 AM FLOOD PLAINSBORO 40.33N 74.60W
04/16/2018 MIDDLESEX NJ LAW ENFORCEMENT
MAPLETON ROAD BETWEEN SEMINARY DRIVE/BARCLAY BLVD AND
LAKEVIEW TERRACE CLOSED DUE TO FLOODING.
&&
EVENT NUMBER PHI1800618
MEOLASpecial weather statement, Apr 16, 12:04 PM EDT, 2 hours 41 minutes before
Special Weather Statement
National Weather Service Mount Holly NJ
1204 PM EDT MON APR 16 2018
DEZ001-MDZ008-PAZ101-102-161630-
New Castle-Cecil-Western Chester-Eastern Chester-
1204 PM EDT MON APR 16 2018
...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN NEW CASTLE...
NORTHEASTERN CECIL AND SOUTHWESTERN CHESTER COUNTIES...
At 1201 PM EDT, a strong thunderstorm was located over Elkton,
moving north at 40 mph.
Winds up to 40 mph, brief heavy downpours and pea size hail are
possible with this storm.
This storm will be near...
Andora and Fair Hill around 1205 PM EDT.
Newark, Glen Westover, Appleton, Blake and Lombard around 1210 PM
EDT.
Kemblesville, Ladenberg and Pike Creek around 1215 PM EDT.
West Grove, North Star, Hockessin and Ashland around 1220 PM EDT.
Kennett Square and Cochranville around 1225 PM EDT.
Coatesville and Marshallton around 1230 PM EDT.
Although cloud to ground lightning has not yet been detected,
lightning strikes may develop shortly with this storm showing signs
of strengthening. Lightning can strike 10 miles away from a
thunderstorm. Seek a safe shelter inside a building or vehicle.
LAT...LON 4001 7595 4005 7593 4001 7555 3949 7578
3954 7594 3982 7597 3993 7599 3994 7598
3995 7600
TIME...MOT...LOC 1601Z 188DEG 36KT 3964 7583
JRKThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 16, 12:32 AM EDT | Winter Weather Advisory | PHI | Sussex | 8 hr |
| Apr 16, 5:20 AM EDT | Special Marine Warning | PHI | 55 min | |
| Apr 16, 5:34 AM EDT | Areal Flood Advisory | PHI | Gloucester, Salem | 4 hr |
| Apr 16, 5:52 AM EDT | Areal Flood Advisory | PHI | Burlington, Camden, Gloucester, Mercer | 7 hr |
| Apr 16, 6:07 AM EDT | Special Marine Warning | PHI | 53 min | |
| Apr 16, 6:30 AM EDT | Areal Flood Advisory | PHI | Hunterdon | 4 hr |
| Apr 16, 6:45 AM EDT | Special Weather Statement | PHI | Cape May, Cumberland | 45 min |
| Apr 16, 6:49 AM EDT | Special Marine Warning | PHI | 86 min | |
| Apr 16, 7:04 AM EDT | Flash Flood Warning | PHI | Gloucester, Salem | 4 hr |
| Apr 16, 7:26 AM EDT | Special Weather Statement | PHI | Camden, Gloucester, Mercer | 34 min |
| Apr 16, 7:49 AM EDT | Special Marine Warning | PHI | 116 min | |
| Apr 16, 8:13 AM EDT | Special Marine Warning | PHI | 62 min | |
| Apr 16, 8:28 AM EDT | Special Weather Statement | PHI | Middlesex, Monmouth, Morris, Somerset, Sussex, Warren | 47 min |
| Apr 16, 9:08 AM EDT | Areal Flood Advisory | PHI | Hunterdon, Mercer, Middlesex, Monmouth, Morris, Ocean and 1 more | 4 hr |
| Apr 16, 9:26 AM EDT | Areal Flood Warning | PHI | Burlington, Hunterdon, Mercer, Middlesex, Monmouth, Morris and 3 more | 4 hr |
| Apr 16, 1:18 PM EDT | Coastal Flood Advisory | PHI | Middlesex, Monmouth, Ocean | 13 hr |
| Apr 16, 1:31 PM EDT | Areal Flood Warning | PHI | Burlington, Hunterdon, Mercer, Middlesex, Monmouth, Morris and 2 more | 4 hr |
| Apr 16, 3:52 PM EDT | Small Craft Advisory | PHI | 44 hr | |
| Apr 16, 4:46 PM EDT | River Flood Warning | PHI | Somerset | 28 hr |
| Apr 16, 5:27 PM EDT | Areal Flood Warning | PHI | Somerset | 8 hr |
| Apr 16, 7:45 AM EDT | River Flood Warning | PHI | Delaware | 4 hr |
| Apr 16, 8:44 AM EDT | Areal Flood Warning | PHI | Philadelphia | 2 hr |
| Apr 16, 10:45 AM EDT | Areal Flood Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 4 hr |
| Apr 16, 11:41 AM EDT | River Flood Warning | PHI | Bucks | 12 hr |
| Apr 16, 12:04 PM EDT | Special Weather Statement | PHI | Chester | 26 min |
| Apr 16, 2:27 PM EDT | Areal Flood Warning | PHI | Montgomery, Philadelphia | 5 hr |
Nearby
Coastal Flood Warnings in New Jersey, 2018Coastal Flood Warnings in Pennsylvania, 2018Every coastal flood warning in 2018
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.