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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 5:41AM | Sunset 8:17PM | Wednesday May 22, 2019 6:38 PM EDT (22:38 UTC) | Moonrise 10:58PM | Moonset 7:49AM | Illumination 84% |  |
ANZ430 Delaware Bay Waters North Of East Point Nj To Slaughter Beach De- 608 Pm Edt Wed May 22 2019
Tonight..S winds 5 to 10 kt. Waves 2 ft or less.
Thu..S winds 10 to 15 kt. Gusts up to 20 kt late. Waves 2 ft or less. A chance of showers. A chance of tstms in the afternoon.
Thu night..SW winds 10 to 15 kt, becoming W late. Waves 2 ft or less. A chance of showers and tstms in the evening, then a chance of showers after midnight.
Fri..NW winds 10 to 15 kt with gusts up to 20 kt. Waves 2 ft or less, then around 3 ft early in the afternoon, then 2 ft or less late.
Fri night..N winds 5 to 10 kt, becoming ne after midnight. Waves 2 ft or less.
Sat..SE winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Waves 2 ft or less.
Sat night..S winds 10 to 15 kt with gusts up to 20 kt. Waves around 3 ft in the evening, then 2 ft or less. A chance of showers.
Sun..W winds around 10 kt. Waves 2 ft or less.
Sun night..W winds 5 to 10 kt, becoming N after midnight. Waves 2 ft or less. A chance of showers.
Mon..NW winds around 5 kt. Waves 2 ft or less. A chance of showers.
Mon night..W winds around 5 kt, becoming nw after midnight. Waves 2 ft or less. A chance of showers in the evening. Winds and waves higher in and near tstms.
Tonight..S winds 5 to 10 kt. Waves 2 ft or less.
Thu..S winds 10 to 15 kt. Gusts up to 20 kt late. Waves 2 ft or less. A chance of showers. A chance of tstms in the afternoon.
Thu night..SW winds 10 to 15 kt, becoming W late. Waves 2 ft or less. A chance of showers and tstms in the evening, then a chance of showers after midnight.
Fri..NW winds 10 to 15 kt with gusts up to 20 kt. Waves 2 ft or less, then around 3 ft early in the afternoon, then 2 ft or less late.
Fri night..N winds 5 to 10 kt, becoming ne after midnight. Waves 2 ft or less.
Sat..SE winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Waves 2 ft or less.
Sat night..S winds 10 to 15 kt with gusts up to 20 kt. Waves around 3 ft in the evening, then 2 ft or less. A chance of showers.
Sun..W winds around 10 kt. Waves 2 ft or less.
Sun night..W winds 5 to 10 kt, becoming N after midnight. Waves 2 ft or less. A chance of showers.
Mon..NW winds around 5 kt. Waves 2 ft or less. A chance of showers.
Mon night..W winds around 5 kt, becoming nw after midnight. Waves 2 ft or less. A chance of showers in the evening. Winds and waves higher in and near tstms.
ANZ400 608 Pm Edt Wed May 22 2019
Synopsis for the coastal waters from sandy hook nj to fenwick island de and for delaware bay.. High pressure will slide offshore this evening. A warm front will cross the region tonight followed by a strong cold front on Thursday night. High pressure will return for Friday into Saturday. Another cold front will drop down into the area late Saturday into Sunday, stalling nearby through early next week.
Synopsis for the coastal waters from sandy hook nj to fenwick island de and for delaware bay.. High pressure will slide offshore this evening. A warm front will cross the region tonight followed by a strong cold front on Thursday night. High pressure will return for Friday into Saturday. Another cold front will drop down into the area late Saturday into Sunday, stalling nearby through 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 222210 afdphi area forecast discussion national weather service mount holly nj 610 pm edt Wed may 22 2019 Synopsis High pressure will slide offshore this evening. A warm front will cross the region tonight followed by a strong cold front on Thursday night. High pressure will return for Friday into Saturday. Another cold front will drop down into the area late Saturday into Sunday, stalling nearby through early next week. Near term until 6 am Thursday morning Forecast mainly on track. Will make minor adjustments to hourly grids based on the latest surface obs. Otherwise, the main story tonight will be showers behind the warm front lifting north over the region. Even though this will be a late night (mostly after midnight) event, a few rumbles of thunder are possible once the warmer air mass arrives. The boundary layer will be relatively dry, so may preclude any heavy downpours through the overnight period despite increasing precipitable water values. Short term 6 am Thursday morning through Thursday night As the low pressure system over the great lakes slides east, our region will see first a pre-frontal trough in the late afternoon evening, followed by a cold front late Thursday night. Although showers, and possibly a thunderstorm or two, will continue to be possible in the warm sector through the morning, the main round of storms we are concerned about are storms that are expected to develop along and ahead of the pre-frontal trough late Thursday afternoon into Thursday evening. Some of these storms could be severe. Most models depict ml CAPE values near or above 1000 j kg in the 21 to 00z time frame along with 0-6km bulk shear values of 40 to 50 kt. Not only is this a significant amount of shear, but model soundings depict plenty of veering with height (especially within the first 3 km). This further enhances the risk that updrafts could be persistent. There are a few potential caveats. First, low mid level clouds may not erode through the morning. This will limit diurnal heating (in anticipation that this may be the case, have gone with the cooler guidance for highs on Thursday), which would limit instability CAPE values. Secondly, related to the first caveat, the NAM depicts a low level inversion (around 900 mb) which never fully erodes through the day (unlike the GFS which depicts this eroding between 21 and 00z). Even if we are cooler and the inversion stays in place, I think we will continue to have at least some severe threat as lift along the trough could be enough to lift elevated parcels above the inversion. The final caveat is that remarkably, model soundings are depicting several dry (and one very dry) layers through the afternoon and evening. This means the lcl will be higher than normal, and will have an impact on the risk for wind, tornado, and heavy rain. Speaking of hazards: damaging wind: this looks to be the primary hazard thanks to a low and mid level jet, and plenty of shear. The low level inversion mentioned above may limit how efficient the mixing is down to the surface, but the dry levels will help to increase the risk of downbursts thanks to an increased risk of dry air entrainment. Hail: severe hail (1" in diameter or greater) is certainly possible, especially if we warm up as much as what the GFS is depicting and are able to realize the higher CAPE values. The highest threat for hail looks to be over DELMARVA and far SE pa where the highest cape values are possible. Tornado: the veering wind profiles increase the risk for rotating updrafts. However, as mentioned above the LCL will be higher than normal which could limit the threat for tornadoes. Heavy rain: although localized downpours will be possible, storms should be moving fast enough to preclude a widespread flooding threat. Storms should move off shore by late Thursday evening. A cold front is then expected to arrive in the region during the pre dawn hours on Friday. Long term Friday through Wednesday High pressure slides across the great lakes region and into the mid- atlantic for Friday, sliding offshore on Saturday. This will allow us to remain dry across the region and have a couple of nice days before the next system arrives. Temperatures on Friday and Saturday should generally be in the 70s to lower 80s across the forecast area. With dry air in place and dew points in the 50s, it should feel quite nice outside during the day, although the dew points may start to creep up a bit on Saturday. With the increasing moisture combined with surface heating, we may see some scattered showers and thunderstorms on Saturday afternoon evening. A cold front will start to drop down from the northwest later on Saturday as the parent low tracks across ontario. The front sags southward through the region through the day Sunday and pushing just offshore Sunday night. The front appears to stall though and it looks like it has plans to hang around through the beginning of the week, which would keep our unsettled so we continue to mention some showers through at least Monday, when it looks like the front might start moving northward as a warm front. The models appear to be coming closer together for the Tuesday Wednesday timeframe but still have enough differences to |
lower forecast confidence. Once the warm front lifts north of the area on Tuesday, it looks to be fairly nice across the region with some warming taking place on Tuesday in the southwesterly flow and increased warming expected for Wednesday. There is the possibility for showers through this period but will keep any mention pretty low for now. Aviation 22z Wednesday through Monday The following discussion is for kphl, kpne, kttn, kabe, krdg, kilg, kmiv, kacy and surrounding areas. Tonight... MostlyVFR conditions are expected. Showers and even a thunderstorm or two are possible, primarily after 06z. Along the coast, winds will start southeasterly, but winds should shift to southerly by late evening with speeds 5 to 10 kt. Thursday... Conditions should startVFR, although ceilings through the morning hours could drop as low as 3000 ft agl. After 18z, thunderstorms are possible across the region. Gusty and variable winds will be possible in the vicinity of any storms. Southwesterly winds of 5 to 15 kt are expected through the day (excluding in the vicinity of storms) outlook... Thursday night... Storms should move east of the TAF sites no later than 06z. Conditions should return toVFR through the later half of the night. Winds should start southwesterly 5 to 10 kt, before shifting to westerly by 03z at 5 to 10 kt. Finally, an abrupt shift to northwesterly at 10 to 15 kt is expected after 06z. Friday... MainlyVFR conditions expected. Northwest winds around around 10 to 15 knots with gusts around 20 to 25 knots through the afternoon. Gusting up to 20 kt, becoming northeasterly and decreasing Friday night. Friday night... MainlyVFR conditions expected. North to northeast winds around 5 to 10 knots early then dropping off to light and variable overnight. Saturday through Saturday night... MainlyVFR conditions expected. Showers and thunderstorms possible from late Saturday afternoon through the overnight period with MVFR or lower conditions possible. Southeast to south winds around 10 knots through the day becoming southwest to west overnight. Sunday... MainlyVFR conditions expected. MVFR or lower conditions possible in showers and thunderstorms, mainly in the afternoon and evening. West to northwest winds around 5 to 10 knots, becoming more northerly overnight. Monday... MainlyVFR conditions expected. MVFR or lower conditions possible in showers and thunderstorms. Northwest winds around 5 knots. Marine Winds and seas are expected to remain below small craft advisory conditions tonight and into mid day on Thursday. Wind gusts near 25 kt and wave heights at 5 feet are possible Thursday afternoon and evening, but will hold off on issuing an SCA at this time as conditions look marginal and brief. Thunderstorms on Thursday evening will be capable of producing wind gusts above 34 kt. Outlook... Friday through Monday... Relatively quiet conditions on the area waters. Winds may gust near 25 knots on Friday. Seas generally around 2 to 4 feet on the ocean and 1 to 2 feet on the delaware bay. Rip currents... a low risk of rip currents is forecast for today, though a sea breeze is expected to develop this afternoon. Equipment The kdix radar is back online and repairs have been completed. However, it will be in a test phase through Thursday to ensure it is stable. Phi watches warnings advisories Pa... None. Nj... None. De... None. Md... None. Marine... None. Synopsis... Meola near term... Johnson mps short term... Johnson long term... Meola aviation... Johnson meola marine... Johnson meola equipment... |
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 | 38 min | 1022.9 hPa (-0.8) | |||||
| DELD1 - 8551762 - Delaware City, DE | 7 mi | 44 min | SE 2.9 G 6 | 70°F | 63°F | 1023.4 hPa | ||
| CHCM2 - 8573927 - Chesapeake City, MD | 14 mi | 44 min | WSW 5.1 G 7 | 70°F | 70°F | 1023.9 hPa | ||
| SJSN4 - 8537121 - Ship John Shoal, NJ | 16 mi | 38 min | SSE 12 G 14 | 67°F | 69°F | 1023.6 hPa (-0.8) | ||
| MRCP1 - 8540433 - Marcus Hook, PA | 23 mi | 62 min | 70°F | 63°F | 1023.1 hPa | |||
| PHBP1 - 8545240 - Philadelphia, PA | 37 mi | 38 min | 77°F | 64°F | 1022.5 hPa (-0.6) | |||
| BDSP1 | 42 mi | 38 min | 73°F | 68°F | 1023.1 hPa (-0.6) | |||
| BRND1 - 8555889 - Brandywine Shoal Light, DE | 42 mi | 38 min | 1024.7 hPa (-0.6) | |||||
| CMAN4 - 8536110 - Cape May, NJ | 48 mi | 38 min | S 8 G 11 | 65°F | 67°F | 1024.3 hPa (-0.0) |
Wind History for Delaware City, DE
(wind in knots) EDIT (on/off) Help| 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 | 3 PM | 4 PM | 5 PM | 6 PM | |
| Last 24hr | NW G12 | NW | NW G10 | NW G10 | N | NE | NE G17 | NE G15 | N | N G11 | NW | N | N | N G7 | N | N | N | NE | E | SE | SE G9 | SE | SE | SE |
| 1 day ago | SW G7 | SW G7 | W | W | NW G11 | NW G10 | NW G17 | NW G20 | NW G17 | NW G17 | NW G16 | NW G16 | NW G13 | NW G17 | N G19 | NW G20 | N G19 | N G15 | NW G13 | NW G14 | N | N G14 | NW G15 | NW G15 |
| 2 days ago | S G10 | S G10 | S G10 | S G7 | S G8 | S | S G8 | S G10 | S G8 | S G9 | SW G11 | SW G15 | SW G10 | SW G7 | SW G11 | SW G11 | SW G9 | W G13 | W G15 | SW G14 | W G11 | SW G11 | W G13 | W G10 |
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 | 47 min | SSE 6 | 10.00 mi | Fair | 72°F | 43°F | 35% | 1023.6 hPa |
Wind History from ILG (wind in knots)
| 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 | 3 PM | 4 PM | 5 PM | 6 PM | |
| Last 24hr | NW | W | W | NW | N | N | N | N | N | N | NW | NW | NW | N | N | N | SE | Calm | Calm | S | S | S | SE | |
| 1 day ago | W G16 | W | W | W | W | NW | NW | NW | NW | NW G17 | NW G18 | NW | NW | NW | NW G21 | NW G21 | N G23 | NW G19 | N | N G18 | NW G18 | NW | NW G20 | N |
| 2 days ago | S | S | S | S | S | S | SE | S | S | S | SW | SW | SW | SW | W | SW | SW | SW G20 | SW | SW G22 | SW G24 | SW G18 | W | W |
Tide / Current Tables for Artificial Island, Salem Nuclear Plant, New Jersey
EDIT Weekend mode (on/off) (on/off) Help One Week of DataArtificial Island
Click for Map
Wed -- 01:39 AM EDT 6.87 feet High Tide
Wed -- 05:42 AM EDT Sunrise
Wed -- 08:47 AM EDT 0.35 feet Low Tide
Wed -- 08:48 AM EDT Moonset
Wed -- 02:16 PM EDT 5.83 feet High Tide
Wed -- 08:15 PM EDT Sunset
Wed -- 08:43 PM EDT 0.89 feet Low Tide
Wed -- 11:57 PM EDT Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Wed -- 01:39 AM EDT 6.87 feet High Tide
Wed -- 05:42 AM EDT Sunrise
Wed -- 08:47 AM EDT 0.35 feet Low Tide
Wed -- 08:48 AM EDT Moonset
Wed -- 02:16 PM EDT 5.83 feet High Tide
Wed -- 08:15 PM EDT Sunset
Wed -- 08:43 PM EDT 0.89 feet Low Tide
Wed -- 11:57 PM EDT Moonrise
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 |
| 5.8 | 6.7 | 6.8 | 6.1 | 4.9 | 3.6 | 2.5 | 1.5 | 0.7 | 0.4 | 1.2 | 2.7 | 4.1 | 5.2 | 5.8 | 5.6 | 4.7 | 3.4 | 2.4 | 1.6 | 1.1 | 0.9 | 1.7 | 3.3 |
Tide / Current Tables for Chesapeake and Delaware Canal, Maryland/Delaware Current
EDIT (on/off) Help One Week of DataChesapeake and Delaware Canal
Click for Map
Wed -- 12:10 AM EDT -0.01 knots Slack
Wed -- 03:50 AM EDT -2.25 knots Max Ebb
Wed -- 05:43 AM EDT Sunrise
Wed -- 07:37 AM EDT 0.01 knots Slack
Wed -- 08:49 AM EDT Moonset
Wed -- 10:41 AM EDT 2.29 knots Max Flood
Wed -- 02:23 PM EDT -0.08 knots Slack
Wed -- 04:37 PM EDT -1.49 knots Max Ebb
Wed -- 07:53 PM EDT 0.01 knots Slack
Wed -- 08:16 PM EDT Sunset
Wed -- 10:42 PM EDT 1.72 knots Max Flood
Wed -- 11:58 PM EDT Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Wed -- 12:10 AM EDT -0.01 knots Slack
Wed -- 03:50 AM EDT -2.25 knots Max Ebb
Wed -- 05:43 AM EDT Sunrise
Wed -- 07:37 AM EDT 0.01 knots Slack
Wed -- 08:49 AM EDT Moonset
Wed -- 10:41 AM EDT 2.29 knots Max Flood
Wed -- 02:23 PM EDT -0.08 knots Slack
Wed -- 04:37 PM EDT -1.49 knots Max Ebb
Wed -- 07:53 PM EDT 0.01 knots Slack
Wed -- 08:16 PM EDT Sunset
Wed -- 10:42 PM EDT 1.72 knots Max Flood
Wed -- 11:58 PM EDT Moonrise
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 |
| 0.6 | -1.3 | -1.8 | -2.2 | -2.2 | -2.1 | -1.7 | -1.1 | 0.9 | 1.7 | 2.2 | 2.3 | 2 | 1.5 | 0.8 | -1 | -1.4 | -1.5 | -1.2 | -0.8 | 0.3 | 1.1 | 1.6 | 1.7 |
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 (18,4,5,8)
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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. |