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 6:51AM||Sunset 7:20PM||Sunday March 26, 2017 7:07 AM EDT (11:07 UTC)||Moonrise 5:11AM||Moonset 4:51PM||Illumination 1%|
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|ANZ430 Delaware Bay Waters North Of East Point Nj To Slaughter Beach De- 627 Am Edt Sun Mar 26 2017 |
Today..E winds 10 to 15 kt. Seas 1 to 2 ft. A chance of drizzle this morning. A chance of showers.
Tonight..SE winds 5 to 10 kt. Seas 1 to 2 ft. A chance of showers. Patchy fog. Vsby 1 nm or less.
Mon..S winds 5 to 10 kt. Seas 1 to 2 ft. Patchy fog early in the morning. A chance of showers in the morning. Vsby 1 nm or less early in the morning.
Mon night..S winds 5 to 10 kt. Seas 1 to 2 ft until early morning...then 1 foot or less. A chance of showers. Patchy fog after midnight with vsby 1 nm or less.
Tue..S winds 5 to 10 kt. Seas 1 to 2 ft. Patchy fog in the morning. A chance of showers. Vsby 1 nm or less in the morning.
Tue night..SW winds around 5 kt...becoming nw 10 to 15 kt with gusts up to 20 kt after midnight. Seas 1 to 2 ft. A chance of showers.
Wed..NW winds 10 to 15 kt. Seas 2 to 3 ft.
Wed night..NW winds 10 to 15 kt. Seas 2 to 3 ft.
Thu..NW winds 10 to 15 kt...becoming ne 5 to 10 kt in the afternoon. Seas 2 to 3 ft.
Thu night..E winds around 5 kt. Seas 1 to 2 ft.
|ANZ400 627 Am Edt Sun Mar 26 2017 |
Synopsis for the coastal waters from sandy hook nj to fenwick island de and for delaware bay.. Canadian high pressure influences our weather today. Low pressure moving from the mississippi valley into the great lakes will draw a warm front northward through our region on Monday. The low will move into southern new england Tuesday night pulling the frontal system off the coast. Canadian high pressure will edge into our area Wednesday and Thursday.
7 Day Forecast for Marine Location Near Colwyn , PAHourly EDIT Help
Area Discussion for - Philadelphia/Mount Holly, PA  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus61 kphi 260804|
area forecast discussion
national weather service mount holly nj
404 am edt Sun mar 26 2017
Canadian high pressure is our primary weather influence today.
Low pressure from the mississippi valley into the great lakes
on Monday will draw a warm front northward through most of our
region. The low will move into southern new england Tuesday
night pulling the frontal system off the coast. Canadian high
pressure will edge into our area Wednesday and Thursday.
Thereafter, low pressure in the ohio valley on Friday should
exit seaward from the mid altantic coast next Saturday.
Near term /until 6 pm this evening/
High pressure across quebec/maine will move offshore today while
weak low pressure slowly moves to near chicago by evening. A
steady onshore flow will continue across our area thru the day.
This will promote an abundance of low clouds and fog along with
some light rain and drizzle at times. Pops will be greatest
across the northern areas where we have hi chc pops and the pops
taper off s/e to slgt chc across SRN de. Unlike Saturday,
temperatures will be below normal, with highs only in the 40s in
most areas, and a few low 50s over delmarva.
Short term /6 pm this evening through 6 am Monday/
The overall pattern will not change much tonight with high
pressure north/east and weak low pressure moving closer across
the great lakes. The onshore flow will continue and the chances
for more measurable rains will increase tonight. The best
chances will again be across the southern poconos, lehigh valley
and north nj where we will have categorical pops. The pops
decrease back to likely over the del valley and cntrl nj and the
chc pops over south nj and SRN de. Patchy fog and drizzle will
occur between the bouts of rain. Overall QPF will not be that
great, a few hundredths across the south and up to 1/4 inch up
Long term /Monday through Saturday/
500 mb: a southern stream weakening short short wave crosses our
area Monday followed by a strengthening northern stream short wave
Tuesday, that closes off off east of new england Wednesday. The
next southern stream short wave probably passes to our south at
the end of the week. Westerly flow should follow for the weekend
before a trough tries to form in the mississippi valley early next
Temperatures: calendar day averages Tuesday 10 to 15 degrees above
normal, near 5 above normal Wednesday, nearly normal Thursday
Forecast basis: 50 50 blended 00z/26 gfs/nam MOS Monday-Tuesday,
then 00z/26 mexmos Tuesday night and thereafter wpc guidance
Monday... Despite winds turning south or southeast, the question
becomes how much warming can occur with a lack of mixing and
considerable cloud cover. Showers possible with the short wave
passage and waa, especially early in the day. Dense fog may
form along the warm front and along the water where the
dewpoints exceed the ssts in the 40s.
Tuesday... Dense fog potential early in the day. Now that we've had
almost a day of southerly flow, it may be easier to warm to the
guidance values. There should be a batch of showers associated
with a developing negative tilt northern stream short wave that
will shove all the moisture out to sea at night with a wind
shift to westerly. (ec and to an extent the ggem are 6-12 hrs
slower but sided with the previous fcst for continuity as well
as the 00z/26 GEFS which emphasizes low pressure tracking ewd
from northern pa to near pou by 23z/27.
Wednesday... Partly sunny and nice. Northwest wind gusty 20 to
Thursday... Fair. Northwest gusty 15 mph.
Friday... Mostly cloudy with a chance of precipitation, mostly rain
if it occurs. Lots of uncertainty on track of the event with a
wide ranging set of model solutions , inclusive of a little wet|
snow potential near and N of i80. Low confidence and have
followed wpc guidance. GEFS confluence of the NRN and SRN stream
is across northern pa.
Saturday... Clearing after any pcpn ends in the morning. Below
average confidence on pcpn occurrence.
Aviation /08z Sunday through Thursday/
The following discussion is for kphl, kpne, kttn, kabe, krdg, kilg,
kmiv, kacy and surrounding areas.
Not a particularly great day for flying across the delaware
valley and surrounding areas with a prolonged onshore flow and
low clouds expected today and tonight. CIGS are lowering across
the area early this morning from N to S over the region behind
the cold front which crossed the area earlier. Ocnl drizzle and
fog will occur as the lower level moisture thickens up. Overall
confid in tafs as to when precip will occur is limited. NE to e
winds mostly 10 to 15 kts today and tonight.
Monday thru Monday night... Periods of MVFR/ifr in low clouds
and fog, with showers especially to start the day.VFR CIGS may
still develop Monday afternoon from around i-95 and points
southeast. South to southwest wind. Confidence: average
Tuesday... Ifr/lifr st/fog possible in the morning but would probably
becomeVFR CIGS in the afternoon, with a period of MVFR/ifr
conds possible in shower, some during the afternoon or evening.
There is some cape, some instability and a neg tilt short wave
so a TSTM is possible. Confidence: average
Wednesday...VFR. Northwest gusty 25 kt. Confidence: average
Thursday...VFR. Northwest gusty 15 kt. Confidence: average
We will keep the SCA flags as they are on the waters and just
raise the next segment with the 330 am issuance, instead of
waiting until 6 a.M. The onshore flow will continue today and a
gradual building of seas will continue. Scattered showers and
patchy fog expected.
Monday thru Wednesday... Seas may remain elevated Monday into
Tuesday, and the SCA may need to extended into this period.
Quite a bit of uncertainty with regards to winds and seas on
Wednesday, which may be near SCA thresholds. Confidence: average
Thursday... Sub-sca. Confidence: above average
Onshore flow is expected through Monday morning, with easterly
wind gusts up to 25 mph at times today. Astronomical tides are
also increasing, coincident with the new moon this Monday, march
27. The estofs remains most aggressive of the guidance suite,
with near minor flooding for the sunrise Monday high tide along
the de and nj oceanfront, and it has has outperformed the other
guidance recently. Both the sit multi model review and GFS etss
are more conservative. Estofs trends for positive departures
(surge) appear to be lessening. The wind will also be trending
more parallel (southerly) to the shore by sunrise Monday, so any
minor tidal inundation flood risk remains a low confidence forecast
with no action at this time.
Marine... Small craft advisory until 8 am edt Monday for anz452-453.
Small craft advisory until 8 am edt Monday for anz450-451.
Synopsis... Drag 404
near term... O'hara
short term... O'hara
long term... Drag 404
aviation... Drag/o'hara 404
marine... Drag/o'hara 404
tides/coastal flooding... 404
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|
|PHBP1 - 8545240 - Philadelphia, PA||4 mi||50 min||43°F||41°F||1028 hPa|
|BDSP1||9 mi||50 min||43°F||1028.6 hPa|
|MRCP1 - 8540433 - Marcus Hook, PA||13 mi||50 min||44°F||1027.5 hPa|
|BDRN4 - 8539094 - Burlington, Delaware River, NJ||22 mi||92 min||42°F||44°F||1028.3 hPa|
|NBLP1 - 8548989 - Newbold, PA||29 mi||50 min||E 6 G 11||42°F||43°F||1029.3 hPa|
|RDYD1 - 8551910 - Reedy Point, DE||30 mi||50 min||44°F||44°F||1027.4 hPa|
|DELD1 - 8551762 - Delaware City, DE||30 mi||50 min||E 13 G 15||44°F||46°F||1027.9 hPa|
|CHCM2 - 8573927 - Chesapeake City, MD||41 mi||50 min||ENE 15 G 17||44°F||46°F||1027.2 hPa|
|SJSN4 - 8537121 - Ship John Shoal, NJ||42 mi||50 min||ENE 9.9 G 11||44°F||43°F||1027 hPa|
|JCRN4 - Jacques Cousteau Reserve, NJ||47 mi||98 min||NE 12||1028 hPa|
Wind History for Philadelphia, PA(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|Philadelphia, Philadelphia International Airport, PA||2 mi||74 min||E 10||10.00 mi||Overcast||43°F||37°F||80%||1028.3 hPa|
|Philadelphia - Wings Field Airport, PA||17 mi||73 min||E 9||10.00 mi||Overcast||41°F||35°F||81%||1027.8 hPa|
|Philadelphia, Northeast Philadelphia Airport, PA||17 mi||74 min||E 10||10.00 mi||Overcast||44°F||37°F||79%||1028.9 hPa|
|Mount Holly, South Jersey Regional Airport, NJ||20 mi||74 min||ENE 7||10.00 mi||Overcast||42°F||37°F||82%||1028.4 hPa|
Wind History from PHL (wind in knots)
|1 day ago||SW||S||S||SW|
|2 days ago||N||N|
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
|Penrose Avenue Bridge |
Click for Map
Sun -- 12:33 AM EDT 6.02 feet High Tide
Sun -- 06:11 AM EDT Moonrise
Sun -- 06:54 AM EDT Sunrise
Sun -- 07:26 AM EDT 0.05 feet Low Tide
Sun -- 12:52 PM EDT 6.35 feet High Tide
Sun -- 05:51 PM EDT Moonset
Sun -- 07:19 PM EDT Sunset
Sun -- 07:57 PM EDT 0.13 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
EDIT (on/off)  Help One Week of Data
Click for Map
Sun -- 01:47 AM EDT -0.00 knots Slack
Sun -- 05:17 AM EDT -1.95 knots Max Ebb
Sun -- 06:10 AM EDT Moonrise
Sun -- 06:53 AM EDT Sunrise
Sun -- 08:44 AM EDT 0.00 knots Slack
Sun -- 10:36 AM EDT 1.78 knots Max Flood
Sun -- 02:03 PM EDT -0.00 knots Slack
Sun -- 05:49 PM EDT -1.96 knots Max Ebb
Sun -- 05:51 PM EDT Moonset
Sun -- 07:19 PM EDT Sunset
Sun -- 09:18 PM EDT 0.00 knots Slack
Sun -- 11:16 PM EDT 1.72 knots Max Flood
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 (7,2,3,4)(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.