Sunday, May31, 2020
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Marine Weather and Tides
Williams, NJ

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 5:32AMSunset 8:22PM Sunday May 31, 2020 11:49 AM EDT (15:49 UTC) Moonrise 1:26PMMoonset 1:36AM Illumination 71% Phase: Waxing Gibbous; Moon at 9 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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ANZ430 Delaware Bay Waters North Of East Point Nj To Slaughter Beach De- 1003 Am Edt Sun May 31 2020
Rest of today..NW winds 10 to 15 kt with gusts up to 20 kt. Waves 2 ft or less.
Tonight..N winds 10 to 15 kt with gusts up to 20 kt. Waves 2 ft or less.
Mon..NW winds 5 to 10 kt. Waves 2 ft or less.
Mon night..SW winds 5 to 10 kt. Waves 2 ft or less.
Tue..SW winds 5 to 10 kt. Waves 2 ft or less. A chance of showers in the afternoon.
Tue night..SW winds 5 to 10 kt. Waves 2 ft or less. A chance of showers.
Wed..W winds 5 to 10 kt. Waves 2 ft or less. A chance of showers in the morning.
Wed night..W winds 5 to 10 kt. Waves 2 ft or less. A chance of showers.
Thu..W winds 5 to 10 kt. Waves 2 ft or less. A chance of showers.
Thu night..SW winds around 5 kt, becoming nw after midnight. Waves 2 ft or less. A chance of showers in the evening.
ANZ400 1003 Am Edt Sun May 31 2020
Synopsis for the coastal waters from sandy hook nj to fenwick island de and for delaware bay.. High pressure will build into the area through Monday before sliding to the south and offshore on Tuesday. A weak trough may approach the region late in the day on Tuesday. A cold front will drop down into the region Wednesday and then stall over the mid-atlantic through the end of the week.


7 Day Forecast for Marine Location Near Williams, NJ
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location: 39.73, -75     debug


Area Discussion for - Philadelphia/Mount Holly, PA
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FXUS61 KPHI 310748 AFDPHI

Area Forecast Discussion National Weather Service Mount Holly NJ 348 AM EDT Sun May 31 2020

SYNOPSIS. High pressure will build into the area through Monday before sliding to the south and offshore on Tuesday. A weak trough may approach the region late in the day on Tuesday. A cold front will drop down into the region Wednesday and then stall over the Mid-Atlantic through the end of the week.

NEAR TERM /UNTIL 6 PM THIS EVENING/.

High pressure will move from Michigan this morning towards the upper Ohio Valley by tonight. This will keep fair weather across the region today. After some seasonably chilly morning lows, temperatures will rise into the mid/upper 60s N/W and low 70s elsewhere. These temps will be about 5 degree below normal. Winds will be north to northwest around 10 mph with some gusts near 20 mph.

SHORT TERM /6 PM THIS EVENING THROUGH 6 AM MONDAY/.

High pressure will continue to move slowly across the upper Ohio Valley into the Middle Atlantic region. A continuation of fair weather with mostly clear skies is expected across our region. Lows tonight will be about 5 degrees cooler than Sat night, so mercury readings will fall into the upper 30s/low 40s N/W and close to 50 for Delmarva and srn NJ. Winds will be mostly N at 5 mph or less.

LONG TERM /MONDAY THROUGH SATURDAY/. Overview: The long term will start cool and dry as a large area of high pressure builds over our region before shifting off shore. However, by Tuesday, we'll see a big shift in the overall pattern as the mid and upper level ridge which has been over the central U.S. will start building east before weakening and flattening. That will leave the Mid Atlantic with a mostly zonal pattern until next weekend, when a trough may try to dig south over the northeastern U.S. once again. At the surface, a front is expected to approach the region mid week, then stall over the Mid Atlantic through the remainder of the week.

Details:

Monday . Monday will be the most comfortable day of the week to be outside. We will still have the low humidity like what we will see today, and temperatures should be 5 to 10 degrees below normal, with highs mostly in the lower 70s. Some models do show a weak low level trough impending on the large area of high pressure which could lead to showers especially over northern NJ and E Central PA. However, I kept the forecast dry as dewpoints should still be in the 30s and 40s, and we should generally see northwesterly low and mid level flow, which means there will be very limited moisture even if the trough does develop.

Tuesday . As the surface high shifts off shore, low level southwesterly return flow develops leading to moisture advection, and setting the stage for rain chances later in the week. The southwesterly flow will also help start a warming trend, although the mid and upper level trough which will be stubbornly sticking around for one more day, will keep temperatures near normal. A shortwave trough digging on the back side of the main mid/upper level trough could be enough to result in showers, though it remains to be seen if this shortwave trough will track close enough to our region to result in rain for us. Therefore, kept the rain chances limited to 20 to 40 percent with this period.

Wednesday . At this point, Wednesday looks like the most uncomfortable day of the week. The cold front is not expected to arrive until Wednesday night, keeping our region in the prime location for moisture advection (with dew points possibly getting in to the 60s) and warm air advection for one more day. In fact, a lot of guidance has the coastal plains in the upper 80s to near 90 (significant as we have yet to have any 90 degree days at any of the climate sites in our area this year). We may not see much in the way of rain during the day on Wednesday as we likely won't have much in the way of lift until the front gets closer to our area.

Thursday through Saturday . The front that approaches our region Wedensday night is expected to stall as the mid and upper level pattern transitions to a zonal flow pattern. The extent and timing of showers and thunderstorms through this period will depend on exactly where the front stalls. For now, I have stayed close to the previous forecast, with a broad brush of slight chance to chances of showers and storms through out the period. However, it is very unlikely that this will be a washout, and if the front stalls far enough south, northern portions of our region, may not see much rain at all (with the exception of when the front initially arrives).

AVIATION /08Z SUNDAY THROUGH THURSDAY/. The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG, KILG, KMIV, KACY and surrounding areas.

Today . VFR expected with a minimal amount of diurnal Cu. The winds will be mostly NW around 10 knots with some gusts closer to 20 knots from late morning into the afternoon.

Tonight . VFR. SKC. Light N to NW winds, locally calm.

Outlook .

Monday . VFR conditions expected. Northwest winds around 5 to 10 knots with gusts to 20 knots possible. High confidence.

Monday night and Tuesday . Mostly VFR conditions expected. However, there is a chance for brief reductions in ceiling or visibility with showers and thunderstorms during Tuesday and Tuesday night. Light winds Monday night will become southwesterly around 5 to 10 knots. Moderate confidence on most aspects of the forecast, but low confidence on the potential for showers and thunderstorms.

Wednesday through Thursday . Predominantly VFR conditions are likely. However, there is a chance for showers and thunderstorms through out the period. Westerly winds around 5 to 10 knots. Low confidence, especially with the timing of showers and thunderstorms.

MARINE. Fair weather is expected today and tonight with high pressure across the waters. A few SCA gusts are possible this morning, but overall conditions will be sub-SCA both today and tonight. Winds will be from the north/northwest today and north/northeast tonight. Seas on the ocean mostly 3 to 4 ft while across Del Bay seas will be 1-2 ft north and 2 to 3 ft south.

Outlook .

Monday through Thursday . Winds and seas should stay below SCA criteria.

Rip Currents .

A northwest wind is expected for Sunday with breaking waves around 2 feet. As a result, there is a low risk for the development of dangerous rip currents.

The wind is forecast to back toward the southwest on Monday. Breaking waves should again be around 2 feet. The low risk is expected to continue into Monday.

FIRE WEATHER. Relative humidity values could drop to 30 percent by this afternoon (especially across the coastal plains of NJ and DE), and wind gusts up to and in excess of 20 MPH are expected today. This could lead to elevated fire weather concerns.

PHI WATCHES/WARNINGS/ADVISORIES. PA . None. NJ . None. DE . None. MD . None. MARINE . None.

Synopsis . Johnson/Meola Near Term . O'Hara Short Term . O'Hara Long Term . Johnson Aviation . Johnson/O'Hara Marine . Johnson/O'Hara Fire Weather .


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PHBP1 - 8545240 - Philadelphia, PA 16 mi49 min 67°F 68°F1019.6 hPa (+0.0)
BDSP1 18 mi49 min 64°F 1020.1 hPa (+0.0)
MRCP1 - 8540433 - Marcus Hook, PA 23 mi49 min 64°F 68°F1019.8 hPa (+0.0)
BDRN4 - 8539094 - Burlington, Delaware River, NJ 25 mi73 min NNE 8 G 13 62°F 72°F1019.5 hPa
JCRN4 - Jacques Cousteau Reserve, NJ 31 mi79 min NW 7 66°F 1020 hPa37°F
NBLP1 - 8548989 - Newbold, PA 31 mi55 min N 13 G 19 64°F 74°F1020.1 hPa
DELD1 - 8551762 - Delaware City, DE 33 mi49 min NNW 6 G 9.9 64°F 70°F1020.1 hPa (+0.0)
RDYD1 - 8551910 - Reedy Point, DE 33 mi49 min 64°F 69°F1019.7 hPa (+0.0)
SJSN4 - 8537121 - Ship John Shoal, NJ 36 mi49 min NNW 8.9 G 11 62°F 1020.5 hPa (+0.6)
ACYN4 - 8534720 - Atlantic City, NJ 40 mi49 min 67°F 58°F1019.6 hPa (+0.3)
CHCM2 - 8573927 - Chesapeake City, MD 45 mi49 min NW 9.9 G 13 64°F 73°F1020.5 hPa (+0.0)

Wind History for Philadelphia, PA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Philadelphia, Philadelphia International Airport, PA17 mi55 minNNW 1110.00 miA Few Clouds66°F37°F34%1020 hPa
Mount Holly, South Jersey Regional Airport, NJ17 mi55 minNW 10 G 1510.00 miFair65°F37°F37%1019.6 hPa

Link to 5 minute data for KPHL

Wind History from PHL (wind in knots)
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Tide / Current Tables for Mantua, Mantua Creek, New Jersey
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Mantua
Click for Map
Sun -- 02:36 AM EDT     Moonset
Sun -- 05:03 AM EDT     0.59 feet Low Tide
Sun -- 05:34 AM EDT     Sunrise
Sun -- 10:59 AM EDT     4.38 feet High Tide
Sun -- 02:26 PM EDT     Moonrise
Sun -- 05:36 PM EDT     0.37 feet Low Tide
Sun -- 08:22 PM EDT     Sunset
Sun -- 11:43 PM EDT     4.44 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.62.92.21.510.60.91.933.84.24.443.22.41.71.10.50.41.12.23.23.94.3

Tide / Current Tables for Philadelphia, Pennsylvania Current
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Philadelphia
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Sun -- 12:54 AM EDT     -2.08 knots Max Ebb
Sun -- 02:36 AM EDT     Moonset
Sun -- 04:44 AM EDT     0.01 knots Slack
Sun -- 05:34 AM EDT     Sunrise
Sun -- 06:42 AM EDT     1.94 knots Max Flood
Sun -- 10:02 AM EDT     -0.01 knots Slack
Sun -- 01:22 PM EDT     -2.13 knots Max Ebb
Sun -- 02:26 PM EDT     Moonrise
Sun -- 05:20 PM EDT     0.00 knots Slack
Sun -- 07:23 PM EDT     1.95 knots Max Flood
Sun -- 08:22 PM EDT     Sunset
Sun -- 10:40 PM EDT     -0.01 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-1.9-2.1-1.9-1.5-0.90.41.71.91.61.10-1.2-1.9-2.1-2.1-1.8-1.5-0.511.91.91.60.9-0.4

Weather Map
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wmap_A
GEOS Local Image of    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Philadelphia/Mount Holly, PA (11,2,3,4)
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Ground Weather Radar Station Philadelphia, PA
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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 numerous 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.