Marine Weather and Tides
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.
|Sunrise 6:47AM||Sunset 4:44PM||Saturday November 18, 2017 6:53 AM EST (11:53 UTC)||Moonrise 6:39AM||Moonset 5:16PM||Illumination 0%|
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|ANZ431 Delaware Bay Waters South Of East Point Nj To Slaughter Beach De- 626 Am Est Sat Nov 18 2017 |
.gale warning in effect from late tonight through late Sunday night...
Today..S winds 10 to 15 kt, increasing to 15 to 20 kt late. Gusts up to 25 kt. Waves 3 to 4 ft. A slight chance of showers late.
Tonight..SW winds 20 to 25 kt. Gusts up to 30 kt, increasing to 35 kt late. Waves 3 to 5 ft. Showers after midnight.
Sun..W winds 25 to 30 kt, diminishing to 20 to 25 kt late. Gusts up to 40 kt. Waves 3 to 5 ft. Showers likely early in the morning.
Sun night..W winds 20 to 25 kt, diminishing to 15 to 20 kt after midnight. Gusts up to 30 kt. Waves 3 to 5 ft.
Mon..W winds 15 to 20 kt with gusts up to 25 kt. Waves around 3 ft.
Mon night..SW winds 10 to 15 kt. Gusts up to 20 kt in the evening. Waves 2 ft or less.
Tue..SW winds 10 to 15 kt. Waves 2 ft or less, then around 3 ft in the afternoon.
Tue night..SW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Waves around 3 ft. A chance of rain after midnight.
Wed..NW winds 10 to 15 kt. Waves 2 ft or less, then around 3 ft in the afternoon. A chance of rain in the morning.
Wed night..NW winds around 15 kt. Waves around 3 ft.
|ANZ400 626 Am Est Sat Nov 18 2017 |
Synopsis for the coastal waters from sandy hook nj to fenwick island de and for delaware bay.. High pressure will move off the east coast this morning while an area of low pressure tracks across the midwest. The low will move northeastward and strengthen across the great lakes region later today and tonight. A strong cold front is expected to move through the mid-atlantic region early Sunday morning while the low progresses through the saint lawrence valley on Sunday. High pressure will build to our south Monday into Tuesday, before a cold front moves across the area Tuesday night or Wednesday morning. High pressure builds into the area Wednesday night and Thursday. The high weakens to our south by Friday while another area of low pressure approaches.
7 Day Forecast for Marine Location Near Port Norris, NJHourly EDIT Help
Area Discussion for - Philadelphia/Mount Holly, PA  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus61 kphi 181135|
area forecast discussion
national weather service mount holly nj
635 am est Sat nov 18 2017
High pressure will move off the east coast this morning while
an area of low pressure tracks across the midwest. The low will
move northeastward and strengthen across the great lakes region
later today and tonight. A strong cold front is expected to move
through the mid-atlantic region early Sunday morning while the
low progresses through the saint lawrence valley on Sunday. High
pressure will build to our south Monday into Tuesday, before a
cold front moves across the area Tuesday night or Wednesday
morning. High pressure builds into the area Wednesday night and
Thursday. The high weakens to our south by Friday while another
area of low pressure approaches.
Near term until 6 pm this evening
630 am update: made some minor edits to temperatures and dew
points this morning (guidance was a little low on dew points and
too warm in the rural spots). Also made some changes to
pops wx QPF grids late this morning and this afternoon, making
a tighter gradient from northwest to southeast based on subtly
improved agreement among the high-resolution guidance (last few
hrrr runs consistently drier south of the mason-dixon line, and
the 06z NAM nest provides corroboration). As mentioned in the
previous discussion (below), a few rounds of showers may occur,
especially in pa.
transient midlevel ridge moving over the region at this time will be
followed by a series of midlevel perturbations downstream of a
potent shortwave trough presently moving out of the rockies into the
central plains. A surface low in eastern kansas this morning will
deepen and move rapidly northeastward into the great lakes region by
late this afternoon, as the shortwave trough pivots into a more
neutral tilt via a strong 500-mb jet streak impinging upon the low-
level warm sector in the ohio tennessee valleys. Downstream
difluent divergent flow will aid in deep large-scale ascent.
Widespread precipitation will occur downstream of the surface low
and poleward of a developing baroclinic zone stretching from
northern illinois to the northern mid-atlantic region. Though the
strongest ascent should stay to our west during this period, in
closer proximity to the main vort MAX and associated surface low,
the predecessor midlevel perturbations, in conjunction with strong
low-level isentropic ascent, will permit widespread showers to
progress eastward through pennsylvania and adjacent states today.
High-resolution models vary on the southward extent of the
precipitation, with the hrrr sometimes indicating coverage extending
through much of DELMARVA and sometimes keeping the showers confined
north of the mason-dixon line. The drier simulations are
corroborated by the 00z NAM nam nest and the 00z gfs, whereas the
wetter simulations have support from the SREF and the hi-res wrf-
nmm. Given the discrepancies, used a blend of the guidance, which
naturally weighs the drier solutions a little higher (i.E., there
are more of them). General timing looks to begin 14z-17z, with
potential for several rounds through the course of the day,
especially in southeast pa. Instability is minimal this far east,
with model soundings showing a deep near-surface stable layer and
moist-adiabatic profiles above - in other words, no thunder mention
in the forecast. QPF through the day may be minimal in the far
southern CWA up to a half inch or so in the southern poconos lehigh
valley, with confidence in totals around average.
As the surface low to the west deepens and approaches, expect the
south southwest winds to start increasing late in the day, though
they should be far from out-of-hand given the fairly stable near-
surface layer and the still-modest surface pressure gradient through
Forecast temps are a blend of ecs met mav MOS as well as input from
hrrr for potential modification from rain. Though agreement is
generally excellent among the guidance, expect some unexpected
deviations from the hourly MAX temperatures owing to impacts from
Short term 6 pm this evening through 6 am Sunday
The surface low in the great lakes region early this evening will
continue deepening and moving northeastward through the st. Lawrence
valley as a strong cold front approaches the eastern seaboard late
tonight. A synoptically-induced low-level jet will be screaming
along and just downstream of the cold front. With substantial low-
level isentropic lift combined with differential cyclonic vorticity
advection downstream of the main vort max, deep large-scale ascent
will accompany the front, allowing for a band of widespread showers
to develop. General quarter to half inch QPF is expected in the
northern part of the area (where lift will be stronger), but most
everyone should see at least some precip as the front
approaches moves through the area. Water loading will likely aid in
downward transport of the stronger winds aloft, so strong wind gusts
may occur in proximity to showers. There are some indications of
shallow thin instability in close proximity to the front, so a
rumble of thunder is not impossible. However, the more likely threat
is contributions to surface wind gust potential via convectively
The timing of the frontal band(s) of showers looks to be after
midnight, with potential for a relatively dry period earlier in the
As the front races eastward, winds will become westerly and
northwesterly and rapidly increase as cold air advection commences
and strong mixing occurs. The wind threat may be enhanced with the
showers but will continue well after the front has passed (see
forecast discussion for Sunday below).
Temperatures are likely to stay elevated tonight in advance of the
front, with little or no decrease in temperatures through the
evening early overnight hours. After frontal passage, the
temperature plunge begins. Notably, precipitation should be all rain
for the southern poconos through 6 am Sunday, as temperatures should
be just starting to make the drop by this point.
Long term Sunday through Friday
The period starts out with a strong cold frontal passage early
Sunday morning. A brisk westerly wind behind the front can be
expected on Sunday. The combination of CAA and daytime heating will
lead to steepening boundary-layer lapse rate and favorable mixing
profiles shortly after sunrise. Bufkit momentum transfer from
nam GFS profiles favor frequent wind gusts of at least 40 mph thru
about mid afternoon. It appears that gusts across the area will be
on the cusp of a wind advisory (greater than 45 mph), especially
from about mid morning thru midday, if the strongest CAA arrives in
concert with the greatest pressure rises (cold conveyor belt) low-
level jet. The models have trended 1-2 mb weaker with the surface
low (982-984 mb) as it passes to our north during the morning, yield
a wind advisory setup that is marginal enough to hold off at this
time. Temperatures are forecast to fall during the morning, then
struggle to rise much during the afternoon as CAA offsets surface
There is a potential for lake-effect snow streamers to reach the
higher elevations of northeastern pa (poconos). It now appears that
the bulk of these snow showers should hold off until after sunrise
Sunday evening. Although snowfall accumulations are expected to be
minor, a brief snow squall could potentially lead to locally|
hazardous travel in the poconos if convection can be sustained this
far downstream (low confidence at this point).
W-nw winds will remain breezy Sunday night with low pressure
continuing to strengthen over southeastern canada and high pressure
building to our southwest. A cold night is in store with continued
caa over the mid atlantic but the winds should keep the boundary
layer well mixed, preventing temperatures from dropping too much
overnight. Lows range from the mid 20s in the poconos to mid 30s in
the cities and along the coast.
High pressure builds across the southeast u.S. Monday. Cool
temperatures (10 degrees below normal) and dry weather can be
expected to start the work week. High pressure moves offshore on
Tuesday. Southerly return flow around the high will yield a
moderating trend with temperatures returning to near normal by
A cold front will likely move thru the area late Tuesday night or
Wednesday morning. The previous forecast was blended with wpc
guidance and low chances for rain was introduced to the forecast as
a result. Models generally show an area of low pressure developing
along the front which would enhance rainfall. However, with large
spread in the models regarding the location and timing of secondary
low development, confidence in the forecast is lower than normal for
the Tuesday night-Wednesday morning period.
Cool and dry weather is anticipated for Thursday and Friday with
high pressure build in. Forecast high generally range between 40-45
degrees on Thursday and 45-50 degrees Friday.
Aviation 12z Saturday through Wednesday
The following discussion is for kphl, kpne, kttn, kabe, krdg,
kilg, kmiv, kacy and surrounding areas.
Today... Conditions should remainVFR this morning with showers
moving in from the west around or after 16z. CIGS may stayVFR
through much of the day, despite the occasional rounds of
showers. However, brief sub-vfr conditions may occur in
proximity to any rainfall. It is possible kacy kmiv see little
or no rainfall today. Winds should be generally southerly around
10 kts, with potential for gusts up to 20 kts, especially at
kmiv kacy. Confidence in CIGS vsbys is average with winds well
Tonight... Conditions should gradually deteriorate at all sites to
sub-vfr (primarily cigs), with a band of showers likely to move
through between 06z and 12z. Gusty erratic winds and convective
turbulence may occur in proximity to showers. Outside of
showers, southwest winds 10 to 15 kts with gusts to 25 kts are
possible, with a quick switch to west or northwest after cold
frontal passage late tonight or early Sunday morning. Winds
will likely become stronger quickly after the front passes, with
gusts 30 to 40 kts likely. Confidence in overall evolution is
above average, but in timing of CIGS wind switch is below
Sunday... CIGS quickly rise toVFR in most areas Sunday morning
although stratocu behind a cold front could keep high-end MVFR
cigs lingering into the late morning in a few spots. Breezy w
winds 15-20 kt will gust to around 35 kt (possibly higher gusts
to near 40 kt). Moderate confidence on CIGS in the morning; high
Sunday night through Tuesday...VFR. W-nw winds gusting 15 to 25
kt. High confidence.
Monday night...VFR and light winds. High confidence.
Tuesday...VFR. W-sw winds gust 15-20 kt during the afternoon.
Tuesday night and Wednesday... Potential for rain to move in late
Tuesday night-Wednesday morning (greatest chance is along the
coast). Sub-vfr CIGS possible. Low confidence.
Gale warning has been issued for delaware bay starting at 1 am
Sunday (with small craft advisory conditions likely beginning
today), and a gale warning remains in effect for the atlantic waters
beginning at 1 pm today. Strong south to southwest winds will begin
rapidly this afternoon, with occasional gusts to gale force likely
over the atlantic waters. As a cold front approaches late tonight,
strong gusts may occur in proximity to showers before a switch to
west northwest winds late tonight (or early Sunday), with frequent
gale-force gusts likely thereafter for the entire marine area. Seas
in the atlantic should rapidly build to 5-8 feet by this evening and
potentially higher overnight.
Showers are also possible today, especially for delaware bay and the
new jersey coastal waters.
Sunday night... Gale warning was extended into Sunday night for
the waters. There may be a brief lull in the winds early Sunday
evening before restrengthening a bit late in the evening and or
overnight as the low deepens well to our north and the pressure
gradient tightens overhead.
Monday through Tuesday night... SCA will be needed, initially for
winds and seas on Monday, just for seas Monday night, then for
winds and seas on Tuesday.
Wednesday... Winds and seas likely to drop below SCA criteria.
Tides coastal flooding
There is a potential for blow out tides on Sunday, especially
in the delaware bay and the tidal portion of the delaware river,
where strong w-nw winds will effectively drain water out of the
bay. The low tide Sunday afternoon evening seems to be the most
susceptible for low water concerns that could impact navigation
in the area.
Phi watches warnings advisories
Marine... Gale warning from 1 pm this afternoon to 5 am est Monday for
Gale warning from 1 am Sunday to 5 am est Monday for anz430-
near term... Cms
short term... Cms
long term... Klein
aviation... Cms klein
marine... Cms klein
tides coastal flooding... Klein
Weather Reporting StationsEDIT (on/off)  Help NOTE: Click on distance to see the station location on a map
|Stations||Dist||Age||Wind||Air Temp||Water Temp||Waves||Pressure||DewPt|
|DRSD1 - Delaware Reserve, DE||23 mi||84 min||Calm||32°F||1016 hPa||30°F|
|JCRN4 - Jacques Cousteau Reserve, NJ||37 mi||84 min||SW 1.9||28°F||1017 hPa||26°F|
Wind History for Brandywine Shoal Light, DE(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|Millville, Millville Municipal Airport, NJ||10 mi||60 min||N 0||10.00 mi||Fair||28°F||26°F||92%||1016.5 hPa|
|Dover Air Force Base, DE||24 mi||58 min||S 7||10.00 mi||Fair||34°F||33°F||100%||1016.6 hPa|
Wind History from MIV (wind in knots)
|1 day ago||W||W||W||W||W||W|
|2 days ago||NE||NE||NE||NE||NE||E||SE||E||E||E||E||E||E||E||N||Calm||Calm||Calm||Calm||Calm||Calm||W||Calm||W |
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
Click for Map
Sat -- 03:01 AM EST 0.04 feet Low Tide
Sat -- 06:39 AM EST Moonrise
Sat -- 06:42 AM EST New Moon
Sat -- 06:47 AM EST Sunrise
Sat -- 08:54 AM EST 6.69 feet High Tide
Sat -- 03:43 PM EST 0.05 feet Low Tide
Sat -- 04:43 PM EST Sunset
Sat -- 05:16 PM EST Moonset
Sat -- 09:13 PM EST 5.41 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
EDIT (on/off)  Help One Week of Data
|Port Elizabeth |
Click for Map
Sat -- 04:45 AM EST 0.03 feet Low Tide
Sat -- 06:39 AM EST Moonrise
Sat -- 06:42 AM EST New Moon
Sat -- 06:47 AM EST Sunrise
Sat -- 11:07 AM EST 5.20 feet High Tide
Sat -- 04:42 PM EST Sunset
Sat -- 05:15 PM EST Moonset
Sat -- 05:27 PM EST 0.04 feet Low Tide
Sat -- 11:26 PM EST 4.21 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Weather Map and Satellite Images(on/off)  Help
|Weather Map ||IR Satellite Image from GEOS|
GOES Local Image of Mid-Atlantic EDIT
Wind Forecast for Philadelphia/Mount Holly, PA (6,6,7,8)(on/off)  Help
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