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Marine Weather and Tides
Version 3.4 |
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 6:15AM | Sunset 7:54PM | Thursday August 17, 2017 9:03 PM EDT (01:03 UTC) | Moonrise 12:47AM | Moonset 3:32PM | Illumination 19% |  |
Marine Forecasts
EDIT (on/off) Help| ANZ430 Delaware Bay Waters North Of East Point Nj To Slaughter Beach De- 633 Pm Edt Thu Aug 17 2017 Tonight..S winds 5 to 10 kt with gusts up to 15 kt. Waves 2 ft or less. A slight chance of showers and tstms until early morning, then a chance of showers and tstms late. Fri..S winds 5 to 10 kt, increasing to 10 to 15 kt late. Waves 2 ft or less, then around 3 ft early in the afternoon. A chance of showers and tstms until late afternoon, then showers and tstms likely late. Fri night..SW winds 5 to 10 kt, becoming W late. Waves 2 ft or less. Showers and tstms likely, mainly in the evening. Sat..W winds 5 to 10 kt. Waves 2 ft or less. Sat night..W winds 5 to 10 kt. Waves 2 ft or less. Sun..NW winds around 5 kt. Waves 2 ft or less. Sun night..W winds around 5 kt. Waves 2 ft or less. Mon..NE winds around 5 kt, becoming S around 5 kt in the afternoon. Waves 2 ft or less. Mon night..S winds 5 to 10 kt. Waves 2 ft or less. Tue..S winds 5 to 10 kt. Waves 2 ft or less. Tue night..SW winds 10 to 15 kt. Waves 2 ft or less. Winds and waves higher in and near tstms. | ANZ400 633 Pm Edt Thu Aug 17 2017 Synopsis for the coastal waters from sandy hook nj to fenwick island de and for delaware bay.. A warm front will lift north of our region later tonight. As low pressure tracks well to our north Friday, a cold front moves through Friday night into early Saturday. High pressure then builds in later Saturday and remains in place into Monday before shifting offshore. The next cold front is scheduled to arrive during Wednesday. |
7 Day Forecast for Marine Location Near Fairton, NJ
Hourly EDIT Helplocation: 39.38, -75.24 debug
Area Discussion for - Philadelphia/Mount Holly, PA
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus61 kphi 171932 afdphi area forecast discussion national weather service mount holly nj 332 pm edt Thu aug 17 2017 Synopsis A warm front will lift north of our region later tonight. As low pressure tracks well to our north Friday, a cold front moves through Friday night into early Saturday. High pressure then builds in later Saturday and remains in place into Monday before shifting offshore. The next cold front is scheduled to arrive during Wednesday. Near term until 6 am Friday morning High pressure centered over new england continues to drift north and east tonight. Meanwhile, low pressure over the western great lakes will also continue to lift to the north and east tonight, and this will drag a warm front into the region tonight. This front should make it through the DELMARVA and delaware valley late tonight, but then gets hung up. Warm fronts are notorious for having a hard time lifting too far north during the overnight hours, so do not think it will make it too much past a line from around kabe to kttn to kmjx. There are several aspects to watch for this evening and tonight. For the delmarva, low level moisture continues to pool around a weak stationary boundary that runs through northeast md and de. Some weak shortwave energy is sliding along that boundary, and touching off isolated to scattered showers and perhaps a few thunderstorms during the early evening hours. The second aspect to watch is the approaching warm front. Scattered showers and thunderstorms will develop out ahead of this front, and look to make it into far western zones this evening. However, looks as if more widespread showers and thunderstorms will develop in the pre-dawn hours on Friday as a strong h5 shortwave moves into the lehigh valley and northwest nj at that time. Will carry the highest pops (likely) in association with that shortwave to the north, and not until well after midnight. A warm and muggy night on tap. Lows will be in the low to mid 70s, and surface dewpoints will creep up into the lower 70s. Given the widespread cloud cover that will spread into the region associated with that warm front, not expecting much fog to develop, but patchy fog is possible in some areas. Short term 6 am Friday morning through 6 pm Friday Friday looks to be an active weather day. Warm front continue to lift to the northeast Friday morning, and showers and thunderstorms will continue to be associated with it. Most activity will taper off from south to north in the morning, and it looks as if there should be a period of dry weather from late morning through early afternoon. With the warm front north of the region, southerly flow users an unusually warm and humid airmass into the region. Surface dewpoints will soar into the mid and upper 70s, along with highs in the upper 80s to around 90 in the delmarva, and in the mid to upper 80s for most of nj and southeast pa, and in the low 80s along the coasts and in the mountains. Going through the afternoon and into the evening, surface low pressure over the western great lakes lifts north and east towards ontario. This drags a surface cold front and h5 trough with several strong shortwaves east. 12z NAM indicating low pressure forming over the DELMARVA early in the evening. For the forecast area, 12z NAM showing sb CAPE of over 3500 j kg and mu CAPE almost 5000 j kg. This is in addition to a lifted index as low as -8c, and 0-6 km bulk shear of 30-40 kt. Pwats also range from 2-2.5 inches. All of this lines up for a period of strong to severe thunderstorms. Sps has the area in a marginal risk for severe weather, and wpc has the area in a slight risk for excessive rain. There is a threat for hail and damaging winds, but with all of this moisture, and based on model guidance, looks as if heavy rain and flooding will be of primary concern. NAM showing a bullseye right over the DELMARVA and southern nj, while the GFS is a bit farther north with that bullseye. It all depends on how training of thunderstorms develops, but it is looking as if somebody will pick up a significant amount of rain Friday afternoon evening. Long term Friday night through Thursday Summary... Convection ends Friday night followed by some lowering of the dew points Saturday and Sunday. Some convection returns next week especially Wednesday with the next cold front, then more noticeable cooling should take place in the wake of that front. Synoptic overview... An upper-level trough swings across the great lakes Friday into Saturday, then into the northeast later Saturday. The flow aloft should then turn more zonal as we start next week, however another trough is forecast to amplify across eastern canada and eventually into the great lakes to the northeast. We used a blend of continuity guidance for Friday night through Saturday night, then blended in the 12z wpc guidance. For Friday night... A convectively active evening should be in store as a cold front arrives along with an attendant short wave. The guidance indicates either mixed modes or a line of convection moving offshore toward later in the evening, with perhaps some leftover convection lingering into the overnight as the cold front arrives. There is the potential for some severe thunderstorms in the evening prior to the boundary layer cooling and or the airmass becoming worked over. Given the potential for at least some convective organization within a rather moist airmass, any robust convection could be capable of producing locally strong winds (wet microbursts). This is especially if cold pool development becomes efficient. Otherwise, an axis of precipitable water in the 2.0-2.5 inch range will lead to torrential downpours. While the convection should be moving, efficient rainfall rates could lead to a localized flash flood risk especially in urban areas. The convection should be weakening as it reaches the coast and beyond overnight. If some thinning occurs in the clouds with light winds, some fog may develop. For Saturday and Sunday... Low pressure is forecast to lift well north of our area with an associated cold front shifting off our coast early in the morning. The main upper-level trough however lags behind, with it arriving across the northeast and mid atlantic late in the day Saturday. Given the passage of the cold front, the precipitable water decreases through the day. As a result the dew points should lower at least some during the course of Saturday into Sunday, although the dry air push looks to be most robust to our |
north through Sunday despite high pressure building in. As the main trough axis aloft arrives later Saturday, some guidance indicates enough lift and instability to develop some convection to our west. This may weaken by the time it reaches our area, plus the column should be drying some. As a result, we kept Saturday post-frontal dry for now. Sunday is looking warm with some humidity along with plenty of sunshine anticipated. For Monday and Tuesday... The flow looks to be more zonal aloft during this timeframe. This drives high pressure eventually offshore as it weakens some later Monday. The next upper-level trough amplifies eastward from the midwest and upper great lakes Tuesday. This will start to back the flow more southwesterly, and there may be a lee-side trough present on Tuesday. As the moisture begins to increase once again combined with the possibility for some convergence and enough instability, some convective development is possible Tuesday afternoon. We will continue with slight chance to low chance pops as a result for Tuesday. Any convection should tend to diminish during the night. For Wednesday and Thursday... The prospects for convection will depend on the timing of an incoming cold front. This will be due to an upper-level trough arriving from the west, however a pre-frontal trough may serve as the primary focus for showers and thunderstorms. We will continue with chance pops with the idea for at least scattered convection possible Wednesday. As of now, the cold front should be offshore to start Thursday and high pressure centered just north of the upper great lakes starts to build southeastward. This should result in a cooler and drier airmass overspreading our region for Thursday. Aviation 19z Thursday through Tuesday The following discussion is for kphl, kpne, kttn, kabe, krdg, kilg, kmiv, kacy and surrounding areas. Vfr this evening, and then CIGS will gradually lower to MVFR late tonight and towards Friday morning. Showers and scattered thunderstorms will develop late tonight as a warm front slowly lifts north through the terminals. Best chances will be at kabe krdg, but then chances spread east early Friday morning. MVFR ifr conditions look to persist after rain ends for a period late Friday morning, and then conditions lift toVFR by early afternoon. A cold front moves into the region from the west Friday afternoon. Showers and thunderstorms with heavy rain will impact the terminals with ifr conditions, as well as the potential for small hail and gusty winds. S winds 5-10 kt through this evening will become lgt vrb, then S 5- 10 kt Friday afternoon. Outlook... Friday night... Some showers and thunderstorms move through mostly in the evening with areas of MVFR ifr conditions for a time, then if clouds thin enough some local fog may develop. Southwest winds 5 knots or less, becoming west-northwest late. Saturday... Some local fog possible very early, otherwiseVFR. Northwest to west winds around 10 knots, diminishing at night. Sunday and Monday...VFR overall with light winds. Tuesday... MainlyVFR. Winds becoming south-southwest 5-10 knots. Marine Winds and seas below SCA criteria tonight through Friday morning. Friday afternoon, a southerly pressure gradient tightens, resulting in 15-20 kt winds. With an inversion over the waters, not expecting 25 kt wind gusts. However, it does appear as if seas could build close to 5 feet for a few hours in the afternoon. Will hold off on a sca for Friday afternoon and evening given low confidence in widespread SCA conditions developing. Scattered showers and thunderstorms will impact the waters tonight, but then widespread showers and thunderstorms with heavy rain, small hail, and gusty winds will impact the waters Friday afternoon and evening. Outlook... Friday night... A southwesterly flow increases some ahead of a cold front, however forecast soundings overall indicate gusts should be below 25 knots. If the increase in winds remain long enough, seas on the ocean zones could build to 5 feet through the evening. Since it looks marginal, held off on a small craft advisory. Some thunderstorms in the evening could produce locally strong wind gusts. Saturday and Sunday... The conditions are anticipated to be below small craft advisory criteria as high pressure gradually builds in. Monday and Tuesday... Light winds to start Monday should become southerly, then increase some on Tuesday. While some gusts to about 20 knots are possible Tuesday, the conditions during this timeframe are anticipated to be below small craft advisory criteria. Rip currents... there remains a moderate risk for the development of dangerous rip currents at ocean beaches through this evening. With increasing southerly winds on Friday, there is also the potential for a moderate risk for the development of dangerous rip currents once again on Friday. Phi watches warnings advisories Pa... None. Nj... None. De... None. Md... None. Marine... None. Synopsis... Gorse near term... Mps short term... Mps long term... Gorse aviation... Gorse mps marine... Gorse mps |
Weather Reporting Stations
EDIT (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 |
| SJSN4 - 8537121 - Ship John Shoal, NJ | 9 mi | 45 min | S 13 G 15 | 79°F | 79°F | 1014 hPa | ||
| RDYD1 - 8551910 - Reedy Point, DE | 21 mi | 45 min | 76°F | 81°F | 1013.8 hPa | |||
| DRSD1 - Delaware Reserve, DE | 23 mi | 93 min | 2.9 | 78°F | 1015 hPa | 75°F | ||
| DELD1 - 8551762 - Delaware City, DE | 23 mi | 45 min | SSE 6 G 11 | 77°F | 78°F | 1014.1 hPa | ||
| BRND1 - 8555889 - Brandywine Shoal Light, DE | 28 mi | 45 min | S 16 G 17 | |||||
| MRCP1 - 8540433 - Marcus Hook, PA | 31 mi | 51 min | 79°F | 1014 hPa | ||||
| CHCM2 - 8573927 - Chesapeake City, MD | 32 mi | 45 min | ESE 1 G 1.9 | |||||
| CMAN4 - 8536110 - Cape May, NJ | 32 mi | 45 min | S 8.9 G 14 | 76°F | 79°F | 1014.2 hPa | ||
| PHBP1 - 8545240 - Philadelphia, PA | 39 mi | 45 min | 81°F | 78°F | 1013.9 hPa | |||
| BDSP1 | 42 mi | 45 min | 81°F | 1014.6 hPa | ||||
| JCRN4 - Jacques Cousteau Reserve, NJ | 42 mi | 93 min | ESE 2.9 | 78°F | 1015 hPa | 72°F | ||
| LWSD1 - 8557380 - Lewes, DE | 42 mi | 45 min | S 4.1 G 5.1 | 78°F | 78°F | 1014.4 hPa | ||
| ACYN4 - 8534720 - Atlantic City, NJ | 44 mi | 45 min | 78°F | 79°F | 1015.4 hPa | |||
| 44057 - Susquehanna, MD | 46 mi | 33 min | S 5.8 G 7.8 | 80°F | 1013.7 hPa |
Wind History for Ship John Shoal, NJ
(wind in knots) EDIT (on/off) Help| 9 PM | 10 PM | 11 PM | -12 PM | -12 PM | -12 PM | -12 PM | -12 PM | 5 AM | 6 AM | 7 AM | 8 AM | 9 AM | 10 AM | 11 AM | 12 PM | 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | 8 PM | |
| Last 24hr | NW | NW | NW | NW | N | NE | NE | E G9 | SE | SE | SE | SE | SE | SE | SE | SE | SE | S | S | |||||
| 1 day ago | N | NE | -- | S G5 | N | N | N | N | NW | NW | NW | NW | NW | W | NW | N | NW | |||||||
| 2 days ago | SE | SE | SE | SE | SE | SE G12 | SE | N | NE | NE | E | E | NE | NW | S | SE | SE | SE | E | NE | NE | N | NE | NE |
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
| Millville, Millville Municipal Airport, NJ | 9 mi | 69 min | SSE 6 | 10.00 mi | Overcast | 78°F | 73°F | 87% | 1014.6 hPa |
| Dover Air Force Base, DE | 21 mi | 65 min | SE 6 | 10.00 mi | Mostly Cloudy | 79°F | 73°F | 84% | 1014.2 hPa |
Wind History from MIV (wind in knots)
| 10 PM | 11 PM | 12 AM | 1 AM | 2 AM | 3 AM | 4 AM | 5 AM | 6 AM | 7 AM | 8 AM | 9 AM | 10 AM | 11 AM | 12 PM | 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | 8 PM | 9 PM | |
| Last 24hr | SW | S | W | Calm | W | W | Calm | Calm | Calm | Calm | NE | E | E | SE | S | SE | SE | |||||||
| 1 day ago | S | Calm | Calm | N | Calm | N | Calm | Calm | Calm | W | NW | NW | W | N | NW | W | W | W | NW | Calm | Calm | |||
| 2 days ago | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | E | E | Calm | E | Calm | SE | Calm | SE | E | NE | NE | NE | NE | Calm | N |
Tide / Current Tables for Tindalls Wharf, Cohansey River, Delaware Bay, New Jersey
EDIT RT Ports Option Weekend mode (on/off) (on/off) Help One Week of Data| Tindalls Wharf Click for Map Thu -- 01:47 AM EDT Moonrise Thu -- 02:11 AM EDT 0.69 feet Low Tide Thu -- 06:15 AM EDT Sunrise Thu -- 08:38 AM EDT 5.90 feet High Tide Thu -- 02:14 PM EDT 0.39 feet Low Tide Thu -- 04:32 PM EDT Moonset Thu -- 07:53 PM EDT Sunset Thu -- 09:06 PM EDT 6.84 feet High Tide Tide / Current data from XTide NOT FOR NAVIGATION |
| 12am | 1am | 2am | 3am | 4am | 5am | 6am | 7am | 8am | 9am | 10am | 11am | 12pm | 1pm | 2pm | 3pm | 4pm | 5pm | 6pm | 7pm | 8pm | 9pm | 10pm | 11pm |
| 2.3 | 1.4 | 0.7 | 1 | 1.9 | 3.2 | 4.4 | 5.2 | 5.8 | 5.8 | 4.8 | 3.3 | 1.9 | 1 | 0.4 | 0.6 | 1.6 | 3.1 | 4.6 | 5.7 | 6.5 | 6.8 | 6.4 | 5.1 |
Tide / Current Tables for Newport Landing, Nantuxent Creek, Delaware Bay, New Jersey
EDIT (on/off) Help One Week of Data| Newport Landing Click for Map Thu -- 01:45 AM EDT 0.47 feet Low Tide Thu -- 01:47 AM EDT Moonrise Thu -- 06:15 AM EDT Sunrise Thu -- 07:34 AM EDT 4.01 feet High Tide Thu -- 01:48 PM EDT 0.27 feet Low Tide Thu -- 04:31 PM EDT Moonset Thu -- 07:53 PM EDT Sunset Thu -- 08:02 PM EDT 4.64 feet High Tide Tide / Current data from XTide NOT FOR NAVIGATION |
| 12am | 1am | 2am | 3am | 4am | 5am | 6am | 7am | 8am | 9am | 10am | 11am | 12pm | 1pm | 2pm | 3pm | 4pm | 5pm | 6pm | 7pm | 8pm | 9pm | 10pm | 11pm |
| 1.2 | 0.7 | 0.5 | 1 | 1.9 | 2.8 | 3.5 | 3.9 | 3.9 | 3.4 | 2.4 | 1.5 | 0.9 | 0.4 | 0.3 | 0.7 | 1.7 | 2.9 | 3.8 | 4.4 | 4.6 | 4.4 | 3.6 | 2.7 |
Weather Map and Satellite Images
(on/off) HelpWeather Map | IR Satellite Image from GEOS GOES Local Image of Mid-Atlantic EDIT  |
Wind Forecast for Philadelphia/Mount Holly, PA (21,6,7,8)
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Ground Weather Radar Station Dover AFB, DE
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Disclaimer: 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. |