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Marine Weather and Tides
Version 3.4 |
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues. 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. |
| Sunrise 6:10AM | Sunset 7:51PM | Tuesday April 24, 2018 8:32 PM EDT (00:32 UTC) | Moonrise 1:12PM | Moonset 2:23AM | Illumination 72% |  |
Marine Forecasts
EDIT (on/off) Help| ANZ430 Delaware Bay Waters North Of East Point Nj To Slaughter Beach De- 634 Pm Edt Tue Apr 24 2018 .small craft advisory in effect until 5 am edt Wednesday... Tonight..E winds 10 to 15 kt with gusts up to 25 kt. Waves around 3 ft. Rain. Wed..E winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt late in the morning, then diminishing to around 5 kt early in the afternoon, becoming nw late. Waves around 3 ft early in the morning, then 2 ft or less. Patchy fog in the morning. Rain likely early in the morning. A chance of rain late in the morning, then a chance of rain late. Wed night..NW winds 5 to 10 kt. Waves 2 ft or less. A chance of showers until early morning. Thu..NW winds 10 to 15 kt with gusts up to 20 kt, becoming W 5 to 10 kt late. Waves 2 ft or less. Thu night..SW winds 5 to 10 kt, becoming S after midnight. Waves 2 ft or less. A chance of showers after midnight. Fri..SE winds 5 to 10 kt. Waves 2 ft or less. A chance of showers. Fri night..W winds around 5 kt. Waves 2 ft or less. A chance of showers. Sat..W winds 5 to 10 kt. Waves 2 ft or less. A chance of showers. Sat night..W winds 5 to 10 kt, becoming nw 10 to 15 kt after midnight. Waves 2 ft or less. A chance of showers in the evening. Sun..NW winds 10 to 15 kt. Waves around 3 ft. Sun night..NW winds 10 to 15 kt. Waves around 3 ft in the evening, then 2 ft or less. | ANZ400 634 Pm Edt Tue Apr 24 2018 Synopsis for the coastal waters from sandy hook nj to fenwick island de and for delaware bay.. An area of low pressure over the carolinas this evening will move slowly north overnight, across our area Wednesday into Wednesday night, and then into new england by Thursday. Very weak high pressure will build into the region Thursday, before another low pressure system moves northward across the east coast on Friday. A cold frontal passage is expected Saturday. High pressure will build across the mid atlantic region into early next week. |
7 Day Forecast for Marine Location Near Hancocks Bridge, NJ
Hourly EDIT Helplocation: 39.49, -75.55 debug
Area Discussion for - Philadelphia/Mount Holly, PA
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus61 kphi 242240 afdphi area forecast discussion national weather service mount holly nj 640 pm edt Tue apr 24 2018 Synopsis An area of low pressure over the carolinas this evening will move slowly north overnight, across our area Wednesday into Wednesday night, and then into new england by Thursday. Very weak high pressure will build into the region Thursday, before another low pressure system moves northward across the east coast on Friday. A cold frontal passage is expected Saturday. High pressure will build across the mid atlantic region into early next week. Near term until 6 am Wednesday morning Latest radar imagery shows edge of rain on the doorstep of forecast area. Expect leading edge to overspread the region within the next few hours. Model guidance has backed off a little on how much moisture advection we may see. Latest runs show precipitable water values by late tonight between 1 and 1.2 inches, which remains quite high for this time of year, but less than what the models were depicting with earlier runs. None the less, there remains a potential for locally heavy rain. For the most part, it looks like the rain amounts will not be enough to cause flooding in our area. However, in the urban corridor from philadelphia up to morris county, if the forecasted rain amounts fall in just a few hours, some flooding is possible in poor drainage areas, so will continue mention of this in the hwo. Still see only very limited elevated instability. Thus will not mention any thunderstorms in the forecast for now. Overnight, temperatures will stay up higher than what we have seen the last several nights, thanks to the moisture advection and persistent cloud cover. Minimum temperatures are forecast to be in the 40s and 50s. Short term 6 am Wednesday morning through 6 pm Wednesday Dry slot should develop in our region tomorrow morning, bringing a quick end to the widespread rain. Depending on how much standing water there is by daybreak, we could have some patchy fog across the region, though it looks like more of a low stratus set up than fog. The lull in rain may not last very long as the trailing mid and upper level trough could result in additional periods of light rain, generally through the second half of the day tomorrow. However, thanks to dry air advection moving in, the threat for heavy rain is very limited tomorrow. Cloud cover may limit heating somewhat, resulting in highs generally in the 50s and 60s across the region. Long term Wednesday night through Tuesday After a brief period of possible unsettled weather at the beginning of the period, dry weather takes hold of the forecast for the rest of the long term forecast. Although the low pressure system that affects our area during the day Wednesday lifts to our north Wednesday night, there will remain a chance of showers on the backside of the low into Wednesday evening as there remains a couple of vorticity impulses that will move across the area. By Thursday, very weak high pressure may briefly affect the area, leading to dry conditions. However, on Thursday night, an area of low pressure will be approaching the area from the southwest. The low itself is not expected to make it across, or near the area, until during the day Friday, or as late as Friday evening. There are timing and locations differences with the low between the guidance. Still, they all indicate an increase in moisture while several short wave vorticity impulses slide across the area as well. This will lead to a chance of showers from late Thursday night through early Friday night, although it will likely not rain everywhere, nor the whole time. Once this low lifts to our northeast, it will combine with another low pressure as it moves out of the great lakes region and across eastern canada and northern new england. This will pull a cold front across the area during the day Saturday. This could bring another chance of showers during the day as the front moves across the area. Behind this front, drier conditions return to the forecast. The low pressure across eastern canada will near the canadian maritimes through Monday, while high pressure across the great lakes and ohio valley Sunday will build to our south Monday into Tuesday. A couple of surface troughs will cross the area during this time period, but are expected to remain dry. For Sunday and Monday, there will be a pressure gradient in place between the high to the south and low to the north, so a steady breeze |
with gusts likely in the 20s is expected, with Sunday having the strongest winds. Aviation 00z Wednesday through Sunday The following discussion is for kphl, kpne, kttn, kabe, krdg, kilg, kmiv, kacy and surrounding areas. Rest of today... MostlyVFR conditions are expected through the remainder of the day time today. Lower ceilings and light rain will start to approach the TAF sites from the south late today. Winds will stay southeasterly, gradually shifting to easterly, with gusts near 20 kt likely. High confidence. Tonight... Ceilings are expected to lower to ifr through the evening and early morning hours. Localized lifr conditions are possible. Additionally, visibility in rain, heavy at times, could be reduced (mostly to MVFR, but occasional ifr visibilities are possible). Easterly winds around 10 kt are expected through the overnight hours. Moderate confidence on the flight category, but low confidence on the timing of changes. Tomorrow... Though the rain may end at many TAF sites during the morning, low clouds are expected to linger through the morning. Improvement to MVFR or evenVFR is possible in the afternoon, but confidence in improving conditions is low. Winds are expected to start easterly, but should shift to northwesterly during the afternoon. Outlook... Wednesday night... MVFR conditions possible early with a chance of showers, before improving overnight. Thursday...VFR conditions expected. Thursday night... GenerallyVFR, although MVFR conditions may begin late in the night across the southern areas as rain approaches. Friday... MVFR, possible ifr, with a chance of scattered showers. Friday night... MVFR conditions possible early with scattered showers, becomingVFR during the evening and overnight. Saturday... MostlyVFR. A chance of showers which may temporarily lower conditions. Saturday night-Sunday...VFR. Winds becoming gusty out of the northwest Sunday morning and may gust 20-25 knots. Marine Southeasterly and easterly winds gusting above 25 kt are expected to continue through tonight. By tomorrow morning, winds may diminish, though seas above 5 feet are expected to continue on the coastal waters. The small craft advisory remains in effect until 6 am on the delaware bay, and through the day tomorrow (and into Thursday) on the coastal waters. Rain and patchy fog could reduce visibility especially early Wednesday morning. Outlook... Wednesday night-Thursday... Small craft advisory remains as seas expected to remain over 5-7 feet. Thursday night-Saturday night... Conditions expected to remain below advisory levels. Sunday... Winds may approach small craft advisory levels on Sunday. Phi watches warnings advisories Pa... None. Nj... None. De... None. Md... None. Marine... Small craft advisory until 6 pm edt Thursday for anz450>455. Small craft advisory until 5 am edt Wednesday for anz430-431. Synopsis... Robertson 99 near term... Johnson 99 short term... Johnson long term... Robertson aviation... Johnson robertson marine... Johnson robertson |
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 |
| RDYD1 - 8551910 - Reedy Point, DE | 5 mi | 45 min | 58°F | 53°F | 1019.4 hPa | |||
| DELD1 - 8551762 - Delaware City, DE | 7 mi | 45 min | E 11 G 16 | 58°F | 51°F | 1019.9 hPa | ||
| CHCM2 - 8573927 - Chesapeake City, MD | 14 mi | 51 min | ENE 4.1 G 8.9 | 57°F | 55°F | 1020.1 hPa | ||
| MRCP1 - 8540433 - Marcus Hook, PA | 23 mi | 51 min | 58°F | 53°F | 1020.5 hPa | |||
| DRSD1 - Delaware Reserve, DE | 28 mi | 123 min | E 5.1 | 55°F | 1020 hPa | 52°F | ||
| PHBP1 - 8545240 - Philadelphia, PA | 37 mi | 45 min | 58°F | 50°F | 1020.9 hPa | |||
| TCBM2 - 8573364 - Tolchester Beach, MD | 41 mi | 45 min | E 7 G 14 | 54°F | 55°F | 1019.1 hPa | ||
| BRND1 - 8555889 - Brandywine Shoal Light, DE | 42 mi | 51 min | E 21 G 23 | 54°F | 1019.6 hPa | |||
| BDSP1 | 42 mi | 45 min | 58°F | 53°F | 1021.2 hPa | |||
| CMAN4 - 8536110 - Cape May, NJ | 48 mi | 45 min | E 12 G 16 | 53°F | 52°F | 1019.2 hPa |
Wind History for Delaware City, DE
(wind in knots) EDIT (on/off) Help| 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 | 9 AM | 10 AM | 11 AM | 12 PM | 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | |
| Last 24hr | S G12 | S G11 | S G8 | SE G8 | S | S | SE | E | SE | E | E | E | SE G9 | SE G9 | SE G17 | SE G18 | SE G17 | SE G17 | SE G20 | SE G20 | SE G20 | SE | E G16 | SE G15 |
| 1 day ago | S | SE | SE | -- | W | S | W | -- | -- | -- | -- | E | SE | SE | SE | SE | S G10 | SE G13 | SE G14 | S G17 | S G16 | S G18 | S G17 | S G13 |
| 2 days ago | W | W G7 | SW | SW G7 | W G8 | W | N G8 | W | NW | NW | N | NE | N | E | E | SE | SE | SE | NE | SE | SE | SE G9 | S | S G11 |
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
| Wilmington, New Castle County Airport, DE | 13 mi | 42 min | E 12 | 10.00 mi | Light Rain | 58°F | 48°F | 70% | 1020.1 hPa |
Wind History from ILG (wind in knots)
| 9 PM | 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 | |
| Last 24hr | SE | SE | SE | SE | SE | SE | E | E | E | E | E | E | SE | SE | SE G21 | SE G22 | SE | SE | SE | SE G21 | SE | E | E | E |
| 1 day ago | S | SE | Calm | SW | Calm | W | Calm | Calm | NE | N | Calm | S | E | SE | SE | S G16 | S | S | S G21 | S | S | S | S | |
| 2 days ago | SW | W | W | W | NW | NW | NW | Calm | Calm | NW | N | N | E | E | E | Calm | S | S | SE | SE | S | S | S | SE |
Tide / Current Tables for Artificial Island, Salem Nuclear Plant, New Jersey
EDIT RT Ports Option Weekend mode (on/off) (on/off) Help One Week of Data| Artificial Island Click for Map Tue -- 12:53 AM EDT 0.68 feet Low Tide Tue -- 03:23 AM EDT Moonset Tue -- 06:12 AM EDT Sunrise Tue -- 06:33 AM EDT 6.34 feet High Tide Tue -- 01:40 PM EDT 0.27 feet Low Tide Tue -- 02:11 PM EDT Moonrise Tue -- 07:17 PM EDT 6.11 feet High Tide Tue -- 07:48 PM EDT Sunset 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 | 0.7 | 1.4 | 2.9 | 4.4 | 5.5 | 6.2 | 6.3 | 5.6 | 4.5 | 3.4 | 2.4 | 1.4 | 0.5 | 0.3 | 1.3 | 2.8 | 4.2 | 5.4 | 6.1 | 5.9 | 5 | 3.8 | 2.7 |
Tide / Current Tables for Chesapeake and Delaware Canal, Maryland/Delaware Current
EDIT (on/off) Help One Week of Data| Chesapeake and Delaware Canal Click for Map Tue -- 02:46 AM EDT 1.81 knots Max Flood Tue -- 03:24 AM EDT Moonset Tue -- 05:15 AM EDT -0.08 knots Slack Tue -- 06:13 AM EDT Sunrise Tue -- 08:42 AM EDT -2.01 knots Max Ebb Tue -- 12:30 PM EDT 0.02 knots Slack Tue -- 02:12 PM EDT Moonrise Tue -- 03:27 PM EDT 2.14 knots Max Flood Tue -- 06:50 PM EDT -0.08 knots Slack Tue -- 07:50 PM EDT Sunset Tue -- 09:31 PM EDT -1.72 knots Max Ebb 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 |
| 0.2 | 1.2 | 1.7 | 1.8 | 1.5 | 0.7 | -1.1 | -1.6 | -1.9 | -2 | -1.8 | -1.4 | -0.9 | 0.9 | 1.7 | 2.1 | 2.1 | 1.7 | 1.2 | -0.5 | -1.3 | -1.7 | -1.7 | -1.5 |
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.
target = "new">Link to Loop
Other links: Northern Pacific Contential US Full GOES-East
Wind Forecast for Philadelphia/Mount Holly, PA (20,4,5,8)
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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. |