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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 6:08AM | Sunset 7:52PM | Wednesday April 25, 2018 2:03 PM EDT (18:03 UTC) | Moonrise 2:18PM | Moonset 3:02AM | Illumination 79% |  |
Marine Forecasts
EDIT (on/off) Help| ANZ430 Delaware Bay Waters North Of East Point Nj To Slaughter Beach De- 1240 Pm Edt Wed Apr 25 2018 This afternoon..SE winds around 5 kt. Waves 2 ft or less. A chance of showers with isolated tstms. Patchy fog. Vsby 1 to 3 nm. Tonight..E winds around 5 kt, becoming nw with gusts up to 20 kt in the late evening and overnight. Waves 2 ft or less. Patchy fog in the evening. A chance of showers in the evening with vsby 1 to 3 nm. 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..S winds around 5 kt. Waves 2 ft or less. Fri..SE winds 5 to 10 kt, becoming S in the afternoon. Waves 2 ft or less. Showers likely. Fri night..W winds 5 to 10 kt. Waves 2 ft or less. A chance of showers in the evening. Sat..W winds around 5 kt. Waves 2 ft or less. Sat night..NW winds 5 to 10 kt. Waves 2 ft or less. 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. Winds and waves higher in and near tstms. | ANZ400 1240 Pm Edt Wed Apr 25 2018 Synopsis for the coastal waters from sandy hook nj to fenwick island de and for delaware bay.. Low pressure will move across our area today then into new england tonight and Thursday. The next low pressure system moves across the east coast during Friday, then a cold front moves through on Saturday. High pressure builds into our region Monday before gradually shifting just off the mid-atlantic coast Tuesday. |
7 Day Forecast for Marine Location Near New Castle, DE
Hourly EDIT Helplocation: 39.66, -75.56 debug
Area Discussion for - Philadelphia/Mount Holly, PA
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus61 kphi 251650 afdphi area forecast discussion national weather service mount holly nj 1250 pm edt Wed apr 25 2018 Synopsis Low pressure will move across our area today then into new england tonight and Thursday. The next low pressure system moves across the east coast during Friday, then a cold front moves through on Saturday. High pressure builds into our region Monday before gradually shifting just off the mid-atlantic coast Tuesday. Near term until 6 pm this evening Low pressure is now centered over southeastern virginia, and continues to lift to the north and east. It should be over delmarva this afternoon, and will continue its northern track towards nyc by this evening. Meanwhile, an upper trough over the great lakes tracks east through the day and moves into western ny pa by this evening as well. Rain continues to move northward through northern new jersey and northeastern pennsylvania this afternoon. Some light rain drizzle and fog continues through central portions of the area. Additionally, dense fog has developed along the coastal areas of new jersey and delaware. With visibilities starting to drop between 1 2 and 1 4 mile as seen on local beach cams, we have issued a dense fog advisory for the immediate coastal sections through 7 pm tonight. Dry slot continues to work its way up through DELMARVA and into southern new jersey and southeastern pennsylvania. As it continues to lift north through the region during this afternoon, the upper trough begins to dig into the northeast us. This results in scattered showers for the afternoon and early evening. There may be enough elevated instability for some isolated thunderstorms, mainly across southeast nj and into the delmarva. Will go ahead and add isolated thunderstorms for those areas, but not expecting much convection. The rain and clouds will keep northern portions of the forecast area relatively colder than the rest of the region, and highs will top off in the 50s to low 60s north and west of the fall line. For southern nj, southeast pa, and parts of delmarva, there should be a break in the precip and possibly a break in the clouds that result in warmer temps, and highs will get into the mid and upper 60s. Clouds have broken up more than anticipated in southern delaware, resulting in a quick jump in temperatures. Highs will reach into the low to mid 70s in areas that see good break and plenty of sunshine through the cloud cover this afternoon. Short term 6 pm this evening through 6 am Thursday Upper trough passes north of the region tonight, and several strong shortwaves will lift through the mid-atlantic and northeast. This will keep some showers in the region, with the best chances in northern nj and the southern poconos. Showers taper off after midnight as this system departs. Winds shift to the northwest, and conditions will dry out towards daybreak Thursday. Lows range from the 40s to low 50s. Long term Thursday through Tuesday Summary... Some showers at times into the weekend, then a significant warm-up probable starting early next week. Synoptic overview... An upper-level trough from the plains to the east coast initially has several strong short wave troughs embedded within, however with time this consolidates into one main trough in the east. This is forecast to take place through the weekend, then strong energy rolling through the western u.S. Allows for a ridge to build in the plains during the weekend which then shifts eastward early next week. Due to the initial multiple short wave troughs within the larger trough, timing can be less certain as well as the strength of the surface features which impacts the details. The overall pattern favors milder air overall (Sunday the coolest day), then as we transition to an incoming ridge early next week the development of significant warmth is probable. For Thursday... A strong short wave trough lifts up across the northeast with northwesterly flow in its wake across our area. The main synoptic ascent is forecast to be to our northeast, therefore a dry forecast is carried for during the daytime. There will be a northwest breeze and with this downsloping especially into the coastal plain results in mild temperatures. A period of dry air advection should help to erode the clouds, however additional clouds will be on the increase at night as a short wave trough rotating around the main trough aloft approaches from the southwest. Some showers with this may arrive into our southwestern areas late at night. For Friday... As the main upper-level trough becomes more consolidated, a short wave trough tracks up its east side and across the mid-atlantic and northeast. This feature looks to open up and start to shear out as it tracks northeastward, however plenty of lift with it as it takes on some initial negative tilt should produce showers especially through early afternoon. A weak surface low may accompany it and this may help maintain some showers into early Friday evening. It is not out of the question that enough instability develops Friday afternoon for some thunder, however opted to leave it out for now. Widespread low clouds accompanying the showers may limit the overall heating potential, therefore |
leaned toward the cooler guidance for high temperatures. There should be some improving conditions at night. For Saturday and Sunday... The upper-level trough sharpens some across the northeast and northern mid-atlantic region Saturday as a ridge shifts eastward from the plains. There may be enough instability Saturday (especially the afternoon) with strong short wave energy glancing the area and a cold front moving through to produce some showers, especially across the northern half of the area. Despite the incoming upper-level trough, mild air should hang on during Saturday then cooling arrives at night and Sunday as the trough axis crosses our area. Sunday is expected to be dry with a northwest breeze as high pressure starts to build in from the west. For Monday and Tuesday... As the pattern shifts to a trough out west, a ridge shifts eastward and this drives surface high pressure over the mid-atlantic region Monday then just offshore on Tuesday. The presence of the building ridge will result in warm air advection and therefore a probable significant warm-up starting during this time frame. Given the presence of surface high pressure with a ridge aloft, dry conditions are forecast. Aviation 18z Wednesday through Monday The following discussion is for kphl, kpne, kttn, kabe, krdg, kilg, kmiv, kacy and surrounding areas. Today... Light to moderate rain across the terminals with ifr conditions prevailing. Some local lifr conditions possible as well. Rain tapers off from south to north by early afternoon, and then additional showers are possible this afternoon. Generally ifr cigs, lifting to MVFR late this afternoon. Cannot rule out a thunderstorm this afternoon, mainly at kacy. East winds 10-15 kt, becoming lgt vrb late this afternoon. Tonight... Scattered showers through midnight or so. Ifr CIGS lift to vfr after midnight. Lgt vrb winds in the evening become NW 10 kt or less by daybreak Thursday. Outlook... Thursday...VFR during the day, then MVFR (locally ifr) ceilings may develop as showers arrive by late night. West-northwest winds 10-15 knots, then diminishing in the evening. Low confidence with onset of sub-vfr conditions. Friday... MVFR (locally ifr) with showers, then conditions should improve toVFR especially at night. Saturday... MostlyVFR, with a few daytime showers possible. Sunday...VFR. Northwest winds may gust up to 25 knots, then diminish toward late day and in the evening. Marine Lowered the SCA on the de bay as winds have finally dropped below 25 knots at brandywine light shoal. For the ocean, wind gusts of 25-30 kt through this afternoon, but seas remain elevated through tonight. We have expanded the dense fog advisory to include all of the nj and de coastal waters through 7pm tonight. Web cams show a strong layer of fog along the coast and it is expected to continue through tonight. Some erosion of the fog bank near delaware can be seen on visible satellite images but confidence is not high that the fog will erode enough to drop the advisory. Otherwise, scattered showers expected through this afternoon. A few thunderstorms are possible on the waters late this afternoon and early this evening. Outlook... Thursday... Small craft advisory for the atlantic coastal waters due to elevated seas. The seas however should subside some at night. Friday and Saturday... A small craft advisory may be needed for a time for the atlantic coastal waters. The winds should be below advisory criteria, however southeasterly flow ahead of a system may be enough to build the seas to around 5 feet. Sunday... The conditions are anticipated to be below small craft advisory criteria, although wind gusts to around 20 knots may occur nearshore during the day. Phi watches warnings advisories Pa... None. Nj... Dense fog advisory until 7 pm edt this evening for njz014- 024>026. De... Dense fog advisory until 7 pm edt this evening for dez004. Md... None. Marine... Dense fog advisory until 7 pm edt this evening for anz450>455. Small craft advisory until 6 pm edt Thursday for anz450>455. Synopsis... Gorse near term... Meola mps short term... Mps long term... Gorse aviation... Gorse meola mps marine... Gorse meola 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 |
| DELD1 - 8551762 - Delaware City, DE | 6 mi | 46 min | NNE 6 G 6 | 58°F | 53°F | 1006.1 hPa | ||
| RDYD1 - 8551910 - Reedy Point, DE | 7 mi | 46 min | 60°F | 53°F | 1005.7 hPa | |||
| MRCP1 - 8540433 - Marcus Hook, PA | 13 mi | 52 min | 61°F | 53°F | 1005.9 hPa | |||
| CHCM2 - 8573927 - Chesapeake City, MD | 16 mi | 52 min | NE 2.9 G 4.1 | 62°F | 55°F | 1006.4 hPa | ||
| PHBP1 - 8545240 - Philadelphia, PA | 29 mi | 46 min | 60°F | 50°F | 1005.7 hPa | |||
| BDSP1 | 34 mi | 46 min | 60°F | 55°F | 1006.1 hPa | |||
| DRSD1 - Delaware Reserve, DE | 40 mi | 154 min | E 2.9 | 57°F | 1007 hPa | 57°F | ||
| BDRN4 - 8539094 - Burlington, Delaware River, NJ | 47 mi | 88 min | E 5.1 G 6 | 60°F | 52°F | 1006.4 hPa | ||
| TCBM2 - 8573364 - Tolchester Beach, MD | 48 mi | 46 min | NNE 8.9 G 9.9 | 57°F | 54°F | 1006.2 hPa |
Wind History for Delaware City, DE
(wind in knots) EDIT (on/off) Help| 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 | 9 AM | 10 AM | 11 AM | 12 PM | 1 PM | |
| Last 24hr | SE G20 | SE G20 | SE G20 | SE | E G16 | SE G15 | E | E | E G12 | E | E G15 | E G15 | E G16 | SE G14 | SE G8 | E | E | E | E | E | E | E | N | NE |
| 1 day ago | SE G14 | S G17 | S G16 | S G18 | S G17 | S G13 | 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 |
| 2 days ago | NE | SE | SE | SE G9 | S | S G11 | S | SE | SE | -- | W | S | W | -- | -- | -- | -- | E | SE | SE | SE | SE | S G10 | SE G13 |
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 | 3 mi | 73 min | E 5 | 9.00 mi | Overcast | 63°F | 61°F | 93% | 1006.5 hPa |
| Philadelphia, Philadelphia International Airport, PA | 23 mi | 70 min | ENE 7 | 2.50 mi | Fog/Mist | 61°F | 59°F | 93% | 1006.4 hPa |
Wind History from ILG (wind in knots)
| 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 | 9 AM | 10 AM | 11 AM | 12 PM | 1 PM | 2 PM | |
| Last 24hr | SE | SE G21 | SE | E | E | E | E | E | E | E | E | E | SE | E | E | E | E | E | NE | NE | NE | NE | E | NE |
| 1 day ago | S | S G21 | S | S | S | S | SE | SE | SE | SE | SE | SE | E | E | E | E | E | E | SE | SE | SE G21 | SE G22 | SE | SE |
| 2 days ago | SE | SE | S | S | S | SE | S | SE | Calm | SW | Calm | W | Calm | Calm | NE | N | Calm | S | E | SE | SE | S G16 | S |
Tide / Current Tables for New Castle, Delaware River, Delaware
EDIT RT Ports Option Weekend mode (on/off) (on/off) Help One Week of Data| New Castle Click for Map Wed -- 03:03 AM EDT 0.34 feet Low Tide Wed -- 04:02 AM EDT Moonset Wed -- 06:10 AM EDT Sunrise Wed -- 08:37 AM EDT 5.53 feet High Tide Wed -- 03:18 PM EDT Moonrise Wed -- 03:44 PM EDT 0.06 feet Low Tide Wed -- 07:50 PM EDT Sunset Wed -- 09:14 PM EDT 5.52 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 | 1.5 | 0.8 | 0.3 | 0.8 | 2.1 | 3.5 | 4.6 | 5.4 | 5.5 | 4.9 | 4 | 3 | 2.1 | 1.2 | 0.3 | 0.1 | 0.9 | 2.3 | 3.7 | 4.8 | 5.5 | 5.3 | 4.5 |
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 Wed -- 01:11 AM EDT 0.04 knots Slack Wed -- 03:49 AM EDT 1.91 knots Max Flood Wed -- 04:03 AM EDT Moonset Wed -- 06:11 AM EDT Sunrise Wed -- 06:37 AM EDT -0.07 knots Slack Wed -- 09:49 AM EDT -1.96 knots Max Ebb Wed -- 01:34 PM EDT 0.03 knots Slack Wed -- 03:19 PM EDT Moonrise Wed -- 04:22 PM EDT 2.14 knots Max Flood Wed -- 07:41 PM EDT -0.05 knots Slack Wed -- 07:51 PM EDT Sunset Wed -- 10:31 PM EDT -1.88 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 |
| -1.2 | -0.5 | 1.2 | 1.8 | 1.9 | 1.6 | 1 | -0.8 | -1.5 | -1.9 | -2 | -1.8 | -1.5 | -1 | 0.9 | 1.7 | 2.1 | 2.1 | 1.7 | 1.1 | -0.8 | -1.5 | -1.8 | -1.8 |
Weather Map and Satellite Images
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GOES 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 (14,3,4,5)
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Ground Weather Radar Station Philadelphia, PA
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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. |