Marine Weather and Tides
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
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|Sunrise 6:48AM||Sunset 7:25PM||Wednesday March 29, 2017 11:10 AM EDT (15:10 UTC)||Moonrise 7:01AM||Moonset 8:22PM||Illumination 5%|
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|ANZ430 Delaware Bay Waters North Of East Point Nj To Slaughter Beach De- 911 Am Edt Wed Mar 29 2017 |
Today..NW winds 10 to 15 kt. Seas 1 to 2 ft.
Tonight..N winds 5 to 10 kt. Seas 1 foot or less.
Thu..NE winds around 5 kt...becoming se in the afternoon. Seas 1 to 2 ft in the morning...then 1 foot or less...then 1 to 2 ft early in the afternoon.
Thu night..SE winds 5 to 10 kt. Seas 1 to 2 ft. A chance of showers after midnight.
Fri..SE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Showers.
Fri night..SE winds 10 to 15 kt with gusts up to 20 kt... Becoming S 5 to 10 kt after midnight. Seas 2 to 3 ft. Showers in the evening.
Sat..N winds 10 to 15 kt. Seas 1 to 2 ft.
Sat night..N winds 10 to 15 kt...diminishing to 5 to 10 kt after midnight. Seas 1 to 2 ft.
Sun..NW winds 5 to 10 kt. Seas 1 to 2 ft.
Sun night..NW winds around 5 kt. Seas 1 foot or less.
|ANZ400 911 Am Edt Wed Mar 29 2017 |
Synopsis for the coastal waters from sandy hook nj to fenwick island de and for delaware bay.. High pressure near hudson's bay will build into our region through tonight. Low pressure moving through the ohio valley on Friday will redevelop near the new jersey coast Friday night and move offshore on Saturday. High pressure will move into the area for Sunday and Monday. Low pressure over the ohio valley and its associated fronts will approach our region on Tuesday.
7 Day Forecast for Marine Location Near Delaware City, DEHourly EDIT Help
Area Discussion for - Philadelphia/Mount Holly, PA  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus61 kphi 291323|
area forecast discussion
national weather service mount holly nj
923 am edt Wed mar 29 2017
High pressure near hudson's bay will build into our region
through Wednesday night. Low pressure moving through the ohio
valley on Friday will redevelop near the new jersey coast
Friday night and move offshore on Saturday. High pressure
will move into the area for Sunday and Monday. Low pressure
over the ohio valley and its associated fronts will approach
our region on Tuesday.
Near term /until 6 pm this evening/
Low pressure south and east of montauk point will continue to
drift out to sea today as high pressure over hudson's bay builds
east. The pressure gradient tightens up a bit this morning, and
with slight caa, can expect NW winds 15-20 mph with gusts up to
25 mph this morning. Winds abate by late morning/early
afternoon as gradient relaxes.
Clouds over eastern and southern nj, and down into de will
continue to scatter out, and mostly sunny skies will develop
across the whole CWA by late morning/early afternoon.
Max temps in the mid 40s in the poconos, and in the low 50s
across northern nj. Otherwise, highs in the upper 50s to low 60s
across central/southern nj, SE pa, and in the low to mid 60s in
Short term /6 pm this evening through 6 am Thursday/
Clear or mostly clear skies, a few fragments of sc in the early
eve and possibly a little cirrus. Some radiational cooling
expected. Light north wind. Normal or slightly below normal
Forecast basis: 50 50 blended 00z/29 gfs/nam MOS guidance. Applied
minor 1-2f cooler than guidance adjustments in our 330 am fcst
Long term /Thursday through Tuesday/
The primary players during the long term will be two southern
stream systems that are expected to impact our region in the
Friday-Saturday and Tuesday time frames.
The first system may produce 1 to 1.5 inches of rain across
portions of the region, especially in the delaware valley. While
there could be some urban and poor drainage flooding, we do not
expect any major impacts on rivers and streams. There is also a
consistent signal in the models for mixed precip north of i-80,
with sleet and freezing rain the primary concerns, during the
Friday night and Saturday morning period. We have mentioned this
in the hwo.
Looking ahead to early next week, the next system is expected to
bring more precip to our region Monday night into Tuesday. This
setup looks warmer, given the absence of high latitude blocking,
and would favor predominantly rain.
Aviation /13z Wednesday through Sunday/
The following discussion is for kphl, kpne, kttn, kabe, krdg,
kilg, kmiv, kacy and surrounding areas.
Today... MVFR CIGS across eastern/southern nj, mainly at
kmiv/kacy, will becomeVFR by 14-15z. Otherwise,VFR. Sct clouds
at 3500 ft possible this afternoon.
Nw winds around 15 kt with 20-25 kt gusts this morning,
diminishing to 10-15 kt by late afternoon.
Tonight...VFR with fragments of sc in the evening and maybe some
thin cirrus at times. Light north wind.
predominantlyVFR, except MVFR possible Friday into Saturday.
Ocnl 25 kt gusts possible until 11 am or so on the ocean waters
this morning, but 25 kt gusts should not be frequent enough or
widespread enough to warrant a sca.
Sca may be needed for anz450-51 (nnj tonight).
Elsewhere... Gusty north wind through the night to around 20-22
sca likely Friday into Saturday, with the potential for gale
force southeasterly wind gusts Friday night, mainly across the
northern nj waters. Otherwise, sub-sca.
Though astronomical tides will be gradually diminishing through
the week now that we are past the new moon, the threat of minor
tidal flooding along the nj and de atlantic coasts increases
late in the week. This is a result of a low pressure system
bringing a prolonged period of onshore flow. The tide of most
concern at this point is the high tide on Friday evening/late
Friday night. By this tide cycle, it will take a surge of 0.8 to
1.0 feet to reach minor flooding thresholds, which is possible
but still uncertain (it will be dependent on how quickly the on
shore flow develops and how strong it will be by then). At least
one source of guidance shows water levels reaching minor tidal
flooding thresholds with the Thursday evening/night high tide,
but that seems unlikely as the latest forecast depicts onshore
flow either developing right around or just after the time of
that high tide.
We have mentioned the potential of minor flooding along the
northern nj coast in the hwo, where the threat is greatest
during the Friday evening/late Friday night high tide cycle.
Mo avg temps
march dep feb dep
abe 38.0 -1.1 39.2 +8.5
acy 41.6 -0.6 43.0 +7.7
ilg 41.7 -1.3 43.1 +8.0
phl 42.2 -1.3 44.2 +8.5
this march will be a below normal month for temps... . One of
the very few the last two years.
We appreciate that this is possibly old news, but march temperatures
will average colder than the feb average at all 4 long term climate
locations. The last time this occurred, 1984.
near term... Mps
short term... Drag
long term... Franck
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|
|RDYD1 - 8551910 - Reedy Point, DE||1 mi||40 min||49°F||46°F||1019.6 hPa|
|DELD1 - 8551762 - Delaware City, DE||1 mi||40 min||N 12 G 13||48°F||45°F||1020 hPa|
|CHCM2 - 8573927 - Chesapeake City, MD||12 mi||40 min||NW 8 G 13||51°F||1019.8 hPa|
|MRCP1 - 8540433 - Marcus Hook, PA||19 mi||40 min||50°F||1019.5 hPa|
|SJSN4 - 8537121 - Ship John Shoal, NJ||22 mi||40 min||47°F||45°F||1019.1 hPa|
|DRSD1 - Delaware Reserve, DE||34 mi||55 min||NNW 4.1||50°F||1020 hPa||42°F|
|PHBP1 - 8545240 - Philadelphia, PA||35 mi||40 min||50°F||44°F||1019.4 hPa|
|BDSP1||39 mi||40 min||48°F||1019.8 hPa|
|TCBM2 - 8573364 - Tolchester Beach, MD||43 mi||40 min||N 8.9 G 11||49°F||48°F||1020.9 hPa|
Wind History for Delaware City, DE(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|Wilmington, New Castle County Airport, DE||8 mi||19 min||NNE 13||10.00 mi||Fair||53°F||36°F||52%||1020.3 hPa|
Wind History from ILG (wind in knots)
|1 day ago||Calm||W||SW||SW||SW||SW||Calm||Calm||E||E||NE||E||NE||NE||NE||NE||NE||NE||NE||NE||N||NE||E||NE|
|2 days ago||E||E||E||NE||E||E||E||E||E||E||E||NE||NE||E||E||E||E||E||E||NE||Calm||SE||N||Calm|
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
|Delaware City Branch Channel bridge |
Click for Map
Wed -- 12:32 AM EDT 6.09 feet High Tide
Wed -- 06:51 AM EDT Sunrise
Wed -- 07:39 AM EDT -0.36 feet Low Tide
Wed -- 08:01 AM EDT Moonrise
Wed -- 12:59 PM EDT 5.91 feet High Tide
Wed -- 07:23 PM EDT Sunset
Wed -- 07:56 PM EDT -0.16 feet Low Tide
Wed -- 09:21 PM EDT Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
EDIT (on/off)  Help One Week of Data
|Chesapeake and Delaware Canal |
Click for Map
Wed -- 02:19 AM EDT -2.21 knots Max Ebb
Wed -- 05:36 AM EDT 0.08 knots Slack
Wed -- 06:51 AM EDT Sunrise
Wed -- 08:02 AM EDT Moonrise
Wed -- 09:01 AM EDT 2.31 knots Max Flood
Wed -- 11:56 AM EDT -0.04 knots Slack
Wed -- 02:51 PM EDT -1.98 knots Max Ebb
Wed -- 05:55 PM EDT 0.07 knots Slack
Wed -- 07:24 PM EDT Sunset
Wed -- 09:16 PM EDT 2.07 knots Max Flood
Wed -- 09:22 PM EDT Moonset
Wed -- 11:42 PM EDT -0.01 knots Slack
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 (11,2,3,4)(on/off)  Help
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The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.