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Marine Weather and Tides
Version 3.4 |
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome. 10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name. |
| Sunrise 6:17AM | Sunset 7:42PM | Thursday April 18, 2019 8:47 AM EDT (12:47 UTC) | Moonrise 5:55PM | Moonset 5:12AM | Illumination 99% |  |
ANZ430 Delaware Bay Waters North Of East Point Nj To Slaughter Beach De- 705 Am Edt Thu Apr 18 2019
.small craft advisory in effect from 2 pm edt this afternoon through Friday afternoon...
Today..S winds 10 to 15 kt with gusts up to 20 kt. Waves 2 ft or less, then around 3 ft late.
Tonight..S winds 10 to 15 kt with gusts up to 25 kt. Waves around 3 ft.
Fri..S winds 15 to 20 kt. Gusts up to 30 kt. Waves around 3 ft. A chance of showers. A chance of tstms late.
Fri night..S winds 15 to 20 kt with gusts up to 30 kt. Waves around 3 ft. Showers with a chance of tstms. Vsby 1 to 3 nm in the late evening and overnight.
Sat..S winds 15 to 20 kt with gusts up to 25 kt. Waves around 3 ft. Showers with a chance of tstms in the morning, then a chance of showers in the afternoon.
Sat night..S winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Waves around 3 ft in the evening, then 2 ft or less.
Sun..SW winds 10 to 15 kt with gusts up to 20 kt. Waves around 3 ft.
Sun night..W winds 5 to 10 kt. Waves 2 ft or less.
Mon..SW winds 5 to 10 kt. Waves 2 ft or less.
Mon night..SW winds 5 to 10 kt, becoming W after midnight. Waves 2 ft or less. Winds and waves higher in and near tstms.
.small craft advisory in effect from 2 pm edt this afternoon through Friday afternoon...
Today..S winds 10 to 15 kt with gusts up to 20 kt. Waves 2 ft or less, then around 3 ft late.
Tonight..S winds 10 to 15 kt with gusts up to 25 kt. Waves around 3 ft.
Fri..S winds 15 to 20 kt. Gusts up to 30 kt. Waves around 3 ft. A chance of showers. A chance of tstms late.
Fri night..S winds 15 to 20 kt with gusts up to 30 kt. Waves around 3 ft. Showers with a chance of tstms. Vsby 1 to 3 nm in the late evening and overnight.
Sat..S winds 15 to 20 kt with gusts up to 25 kt. Waves around 3 ft. Showers with a chance of tstms in the morning, then a chance of showers in the afternoon.
Sat night..S winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Waves around 3 ft in the evening, then 2 ft or less.
Sun..SW winds 10 to 15 kt with gusts up to 20 kt. Waves around 3 ft.
Sun night..W winds 5 to 10 kt. Waves 2 ft or less.
Mon..SW winds 5 to 10 kt. Waves 2 ft or less.
Mon night..SW winds 5 to 10 kt, becoming W after midnight. Waves 2 ft or less. Winds and waves higher in and near tstms.
ANZ400 705 Am Edt Thu Apr 18 2019
Synopsis for the coastal waters from sandy hook nj to fenwick island de and for delaware bay.. A warm front will slide northward across our area today into tonight. Low pressure tracking up the ohio valley Friday will slowly push a strong cold front toward our area. As the strong energy aloft arrives later Saturday into Sunday, the strong cold front will move through. High pressure will then build into the region from the south Sunday night into Monday, followed by a cold front moving through late Monday into Tuesday. High pressure then builds to our north Tuesday into Wednesday.
Synopsis for the coastal waters from sandy hook nj to fenwick island de and for delaware bay.. A warm front will slide northward across our area today into tonight. Low pressure tracking up the ohio valley Friday will slowly push a strong cold front toward our area. As the strong energy aloft arrives later Saturday into Sunday, the strong cold front will move through. High pressure will then build into the region from the south Sunday night into Monday, followed by a cold front moving through late Monday into Tuesday. High pressure then builds to our north Tuesday into 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 181021 afdphi area forecast discussion national weather service mount holly nj 621 am edt Thu apr 18 2019 Synopsis A warm front will slide northward across our area today into tonight. Low pressure tracking up the ohio valley Friday will slowly push a strong cold front toward our area. As the strong energy aloft arrives later Saturday into Sunday, the strong cold front will move through. High pressure will then build into the region from the south Sunday night into Monday, followed by a cold front moving through late Monday into Tuesday. High pressure then builds to our north Tuesday into Wednesday. Near term until 6 pm this evening A few sprinkles or light showers will be possible through this morning, especially across the lehigh valley, southern poconos, and nw nj as weak upslope flow continues ahead of the warm frontal passage. Warm air is already advecting across the area at the 850 mb level, however, it will be slow to work its way northward at the surface across the northern half of the cwa. There will likely be a fairly stark temperature gradient as the warm air works its way northward by this afternoon with surface temperatures warming into the low 70s from roughly i-195 and southward where the front passes north. On the other hand, kept temperatures on the cool side in the low 60s for highs in the higher terrain of the poconos and far NW nj as cooler upslope flow will be stubborn to break. Winds will turn southerly through the afternoon as the front works its way northward. Short term 6 pm this evening through 6 am Friday The warm front will finally work its way through the rest of the region tonight. Will be a quiet night with only a few scattered light showers or sprinkles across the northern third of the forecast area as the front lifts across the rest of the region. Southerly flow will continue through the night, advecting warmer and moister air northward. Lows will be on the milder side ranging from the low 60s from the philadelphia metro southward to the mid 50s across the poconos and northern nj. Long term Friday through Wednesday Summary... Warm air ahead of a strong system Friday and Saturday then some cooling Sunday. Heavy rain and potentially some gusty thunderstorms move through later Friday into Saturday. Another surge of warm air Monday before some cooling takes place again Tuesday and Wednesday. Synoptic overview... A ridge in the western atlantic ocean Friday while a highly amplified trough from the great lakes to the lower mississippi valley closes off during Friday. This feature will roll east-northeastward and drive surface low pressure up the ohio valley. A strong short wave rolls northward just ahead of the closed low Friday night and Saturday morning, and a secondary surface low moves northward into the vicinity of western pennsylvania. The amplified and slow motion of this storm will delay the arrival of the strong cold front into our area, with the actual frontal passage becoming more of an occlusion with time. This closed low will cross our area Sunday before opening up as it lifts to our northeast Sunday night into Monday. The flow aloft then becomes more zonal for a time early next week. For Friday and Saturday... A rather active time as an upper-level trough closes off as it slowly arrives into the east. The amplification of this system results in deep southerly flow increasing substantially well ahead of the cold front, and this will result in ample warm air advection and eventually ascent. Southerly surface winds should gust to 30-40 mph Friday afternoon and evening especially in the coastal plain with an increase in the low-level jet. Where the boundary layer warmth is maximized, then the vertical mixing will be more efficient. Friday however may start with areas of low clouds especially across the northern areas. Large scale ascent ahead of the closed low and strong short wave will team up with a strong low-level jet and potentially drive an embedded squall line eastward Friday night. The system overall continues to look slower given that is closes off. The initial surface low is forecast to track up the ohio valley, however a new surface low should develop near the triple point ahead of strong short wave energy associated with the closed low. This low should generally track west of our area, and this all may tend to delay the bulk of the forcing and therefore showers thunder until late Friday afternoon and especially overnight Friday. Overall the daytime hours of Friday may have more scattered showers and perhaps some thunder within the warm sector, then the more organized convection arrives Friday night. The severe weather potential depends on the amount of instability as lapse rates aloft do not look as steep along with perhaps some lower clouds beneath an inversion. The timing looks later and therefore not as favorable regarding peak instability, however deep southerly flow may compensate somewhat even at night and the shear looks impressive. The strength of the shear alone can certainly compensate for the lower instability especially as convection encounters the low-level jet, therefore a squall line or a broken band of lower topped convection may roll through Friday night with locally strong to damaging wind gusts. The greatest severe threat continues to be delmarva southward, however further north the strong shear may still result in some robust convective winds reaching the surface. As such, SPC has expanded the marginal risk northward. The guidance indicates a narrow but intense plume of moisture ahead of this closed low resulting in pw values increasing to 1.5-2.0 inches. The freezing level is forecast to be rather high, therefore warm rain processes will result in more efficient rainfall rates. The flow increasingly more meridional will result in heavy rain and potentially some flash flooding especially if cells tend to train in a south to north fashion. Given uncertainty on the more focused area of heaviest rain, held off on any watches for now. A mention continues in hazardous weather outlook. The surface system is forecast to lift east and north of our area Saturday, however the closed low aloft will be arriving therefore after a wet start to Saturday there may still be some instability showers during the afternoon and at night. For Sunday and Monday... The upper low moves across our area Sunday, then it should gradually be weakening and lifting to our northeast Sunday night. There should still be some instability showers around especially on Sunday. High pressure then starts to build in from the south, however a weak cold front moves through later Monday into Tuesday. The timing of this front will depend on how fast the closed low opens up and lifts out. It will turn much warmer again Monday ahead of the front assuming the closed low has already exited the region. For Tuesday and Wednesday... High pressure is forecast to build to |
our north during this time frame resulting in more of an onshore flow. There is some timing details that need to be worked out regarding the cold front mentioned above, as some guidance is slower with it and brings it through on Tuesday. We leaned closer to the wpc timing. A short wave trough may start to arrive by later Wednesday, therefore kept some low pops for possible showers in for both days. Aviation 10z Thursday through Monday The following discussion is for kphl, kpne, kttn, kabe, krdg, kilg, kmiv, kacy and surrounding areas. Today... MVFR CIGS this morning. A brief light shower or sprinkle is possible at rdg, abe, or ttn. Improvement toVFR conditions by early afternoon as the warm front lifts across the region from south to north. Southeasterly winds from 5 to 10 knots turning southerly to even southwesterly around 10 knots this afternoon. Some higher gusts up to 15 knots possible, especially at acy. Tonight... GenerallyVFR with strengthening southerly winds expected. Marginal MVFR CIGS possible toward Friday morning. Low level wind shear is expected to develop overnight for the delaware valley and coastal TAF sites. Outlook... Friday and Saturday... Areas of MVFR ceilings Friday becoming widespread MVFR to ifr Friday night into Saturday morning, then improving toVFR by later Saturday. A southerly low-level jet should result in low-level wind shear Friday night especially for the i-95 terminals on eastward. Showers and some thunderstorms especially later Friday afternoon into Saturday morning will result in ifr visibilities at times. Southerly winds 10-20 knots with gusts of 25-35 knots. Sunday...VFR ceilings may transition to MVFR ceilings at times with some showers around. South to southwest winds 10-15 knots, becoming west-southwest at night. Monday...VFR. West-southwest winds 5-10 knots. Marine Today... SCA conditions with easterly winds 15 to 20 knots. Winds turning to a southerly direction through the afternoon. Gusts up to 25 knots possible over the ocean waters and over the bay. Seas between 4 to 6 feet. Tonight... Southerly winds increasing to 20 to 25 knots, with gusts up to 30 knots possible. Seas building to 5 to 7 feet. Outlook... Friday... Small craft advisory conditions expected as seas build well above 5 feet and winds gust to around 30 knots. Southerly gale force gusts are possible, however this will be within a warm air advection regime limiting mixing over the colder waters. For now, extended the advisory through 22z 6pm for now and also added delaware bay. Despite the winds, areas of marine fog may develop for a time as warm moist air moves over the cooler waters. Saturday... Small craft advisory conditions with gusts of up to 25 knots, however winds diminish at night. Seas 6-10 feet on the ocean waters. Sunday... Winds below advisory criteria, however seas remaining elevated on the ocean zones although due slowly subside at night. Monday... Conditions (seas) dropping below advisory criteria. Tides coastal flooding East to southeast surface flow turns more southerly and increases by later today and continues through Friday night. This will increase the surge above astronomical tide. Minor tidal flooding is anticipated, and localized moderate tidal flooding is possible with the high tide tonight and especially Friday night. With the full moon on Friday, the astronomical tide both tonight and Friday night is less than one foot below minor flooding thresholds. The surge is expected to be at least one foot on the ocean front despite more of a southerly wind component. Spotty minor tidal flooding is possible with the daytime high tide today. However, water levels with this tide cycle are expected to remain below advisory level. There are a few factors that could further increase tidal flooding concerns. First, heavy rain is possible Friday night. While the heaviest rain should be west of the coastal plain, any higher rainfall rates near the time of the Friday night high tide could enhance tidal flooding above the current forecast. Secondly, though the Friday morning high tide is a lower astronomical tide and there won't be much flooding on the oceanfront, there could be impacts on the back bays as there will be limited opportunity for water to evacuate after the Thursday night high tide given strong southerly winds. For the northeastern shore of the chesapeake bay, this area will be slower to see any tidal flooding with this system. However, if the current model trends continue then minor tidal flooding will be possible with the Saturday morning high tide. Phi watches warnings advisories Pa... None. Nj... None. De... None. Md... None. Marine... Small craft advisory until 6 pm edt Friday for anz450>455. Small craft advisory from 2 pm this afternoon to 6 pm edt Friday for anz430-431. Synopsis... Gorse near term... Davis short term... Davis long term... Gorse aviation... Davis gorse marine... Davis gorse tides coastal flooding... |
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 | 48 min | ESE 20 G 22 | 57°F | 57°F | 1017 hPa (-0.7) | ||
| RDYD1 - 8551910 - Reedy Point, DE | 21 mi | 48 min | 1016.9 hPa (-1.0) | |||||
| DELD1 - 8551762 - Delaware City, DE | 23 mi | 48 min | ESE 7 G 8 | 57°F | 54°F | 1017.5 hPa (-0.9) | ||
| BRND1 - 8555889 - Brandywine Shoal Light, DE | 28 mi | 54 min | 1017.8 hPa | |||||
| MRCP1 - 8540433 - Marcus Hook, PA | 31 mi | 48 min | 57°F | 57°F | 1017.7 hPa (-0.7) | |||
| CHCM2 - 8573927 - Chesapeake City, MD | 32 mi | 48 min | SE 9.9 G 16 | 58°F | 57°F | 1017.7 hPa (-0.7) | ||
| CMAN4 - 8536110 - Cape May, NJ | 32 mi | 48 min | SE 13 G 15 | 57°F | 53°F | 1017.2 hPa (-0.5) | ||
| PHBP1 - 8545240 - Philadelphia, PA | 39 mi | 48 min | 57°F | 56°F | 1018.2 hPa (-0.6) | |||
| BDSP1 | 42 mi | 48 min | 56°F | 57°F | 1018.9 hPa (-0.5) | |||
| LWSD1 - 8557380 - Lewes, DE | 42 mi | 48 min | SSE 8.9 G 14 | 58°F | 53°F | 1017.4 hPa (-0.3) | ||
| ACYN4 - 8534720 - Atlantic City, NJ | 44 mi | 48 min | 53°F | 52°F | 1019 hPa (-1.2) |
Wind History for Ship John Shoal, NJ
(wind in knots) EDIT (on/off) Help| 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 | 10 PM | 11 PM | 12 AM | 1 AM | 2 AM | 3 AM | 4 AM | 5 AM | 6 AM | 7 AM | 8 AM | |
| Last 24hr | E | E G11 | E | E | SE | E G14 | SE | SE G16 | SE | E | E | E G16 | E | E G16 | E G15 | E G10 | E G9 | E | E | E G28 | E | E | E | SE |
| 1 day ago | NW | NW | NW | NW | W | W | W | W | W G19 | W | SW | SW | SW | S | S | S G12 | S | NE | NE | NE | NE | NE | E | E |
| 2 days ago | W G17 | W | W | W | W | W | W | NW G40 | W G40 | W G41 | NW | NW G39 | NW | NW G34 | NW | NW | W | W | W | W | W G16 | W | W G17 | W G17 |
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 | 54 min | SE 10 | 10.00 mi | Mostly Cloudy | 60°F | 55°F | 84% | 1017.7 hPa |
| Dover Air Force Base, DE | 21 mi | 1.9 hrs | E 10 | 10.00 mi | Overcast | 55°F | 53°F | 93% | 1017.6 hPa |
Wind History from MIV (wind in knots)
| 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 | 10 PM | 11 PM | 12 AM | 1 AM | 2 AM | 3 AM | 4 AM | 5 AM | 6 AM | 7 AM | 8 AM | |
| Last 24hr | NE | E | E | E | E | E | E | SE | SE | E | E | E | E | E | E | E | E | E | SE | SE | SE | E | SE | SE |
| 1 day ago | NW G24 | NW G24 | NW G21 | NW G19 | W G20 | W G23 | W | W G20 | W G20 | W G16 | W | SW | Calm | Calm | E | NE | NE | NE | E | E | E | |||
| 2 days ago | W | W G26 | W G35 | W G37 | W G38 | W G37 | W G36 | NW G42 | W G38 | NW G36 | NW G37 | NW G29 | NW G23 | NW G21 | NW | W | W | W | W | W | W | W | W |
Tide / Current Tables for Tindalls Wharf, Cohansey River, Delaware Bay, New Jersey
EDIT Weekend mode (on/off) (on/off) Help One Week of DataTindalls Wharf
Click for Map
Thu -- 05:36 AM EDT -0.29 feet Low Tide
Thu -- 06:11 AM EDT Moonset
Thu -- 06:19 AM EDT Sunrise
Thu -- 12:12 PM EDT 6.84 feet High Tide
Thu -- 06:00 PM EDT -0.30 feet Low Tide
Thu -- 06:55 PM EDT Moonrise
Thu -- 07:41 PM EDT Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Thu -- 05:36 AM EDT -0.29 feet Low Tide
Thu -- 06:11 AM EDT Moonset
Thu -- 06:19 AM EDT Sunrise
Thu -- 12:12 PM EDT 6.84 feet High Tide
Thu -- 06:00 PM EDT -0.30 feet Low Tide
Thu -- 06:55 PM EDT Moonrise
Thu -- 07:41 PM EDT Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
| 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 | 10 pm | 11 pm |
| 7 | 6.1 | 4.4 | 2.7 | 1.3 | 0 | -0.2 | 0.7 | 2.2 | 3.8 | 5.2 | 6.3 | 6.8 | 6.4 | 4.9 | 3.2 | 1.8 | 0.4 | -0.3 | 0.2 | 1.5 | 3.2 | 4.8 | 6.2 |
Tide / Current Tables for Newport Landing, Nantuxent Creek, Delaware Bay, New Jersey
EDIT (on/off) Help One Week of DataNewport Landing
Click for Map
Thu -- 05:10 AM EDT -0.20 feet Low Tide
Thu -- 06:10 AM EDT Moonset
Thu -- 06:19 AM EDT Sunrise
Thu -- 11:08 AM EDT 4.64 feet High Tide
Thu -- 05:34 PM EDT -0.21 feet Low Tide
Thu -- 06:55 PM EDT Moonrise
Thu -- 07:41 PM EDT Sunset
Thu -- 11:35 PM EDT 4.90 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Thu -- 05:10 AM EDT -0.20 feet Low Tide
Thu -- 06:10 AM EDT Moonset
Thu -- 06:19 AM EDT Sunrise
Thu -- 11:08 AM EDT 4.64 feet High Tide
Thu -- 05:34 PM EDT -0.21 feet Low Tide
Thu -- 06:55 PM EDT Moonrise
Thu -- 07:41 PM EDT Sunset
Thu -- 11:35 PM EDT 4.90 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
| 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 | 10 pm | 11 pm |
| 4.2 | 3.2 | 2.1 | 1.2 | 0.4 | -0.2 | 0.1 | 1.1 | 2.3 | 3.4 | 4.2 | 4.6 | 4.3 | 3.5 | 2.4 | 1.5 | 0.7 | -0.1 | -0.1 | 0.6 | 1.8 | 3.1 | 4.1 | 4.8 |
Weather Map and Satellite Images
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GOES Local Image of Mid-Atlantic 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.
Link to Loop
Other links: Northern Pacific Contential US Full GOES-East
Wind Forecast for Philadelphia/Mount Holly, PA (8,2,3,4)
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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. |