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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 8:16PM | Tuesday May 21, 2019 6:31 PM EDT (22:31 UTC) | Moonrise 10:08PM | Moonset 6:58AM | Illumination 91% |  |
ANZ430 Delaware Bay Waters North Of East Point Nj To Slaughter Beach De- 615 Pm Edt Tue May 21 2019
Tonight..NW winds 10 to 15 kt, becoming N 5 to 10 kt after midnight. Waves 2 ft or less.
Wed..N winds 5 to 10 kt, becoming se in the afternoon. Waves 2 ft or less.
Wed night..S winds 5 to 10 kt. Waves 2 ft or less.
Thu..S winds 10 to 15 kt. Gusts up to 20 kt in the late morning and afternoon. Waves 2 ft or less. A chance of showers and tstms in the afternoon.
Thu night..SW winds 10 to 15 kt with gusts up to 20 kt, becoming W after midnight. Waves 2 ft or less. A chance of showers and tstms.
Fri..NW winds 10 to 15 kt with gusts up to 20 kt. Waves 2 ft or less.
Fri night..N winds 10 to 15 kt, becoming ne 5 to 10 kt after midnight. Waves 2 ft or less.
Sat..SE winds 5 to 10 kt. Waves 2 ft or less.
Sat night..S winds 10 to 15 kt, becoming sw after midnight. Waves 2 ft or less. A chance of showers.
Sun..W winds 5 to 10 kt. Waves 2 ft or less.
Sun night..W winds around 5 kt. Waves 2 ft or less. A chance of showers. Winds and waves higher in and near tstms.
Tonight..NW winds 10 to 15 kt, becoming N 5 to 10 kt after midnight. Waves 2 ft or less.
Wed..N winds 5 to 10 kt, becoming se in the afternoon. Waves 2 ft or less.
Wed night..S winds 5 to 10 kt. Waves 2 ft or less.
Thu..S winds 10 to 15 kt. Gusts up to 20 kt in the late morning and afternoon. Waves 2 ft or less. A chance of showers and tstms in the afternoon.
Thu night..SW winds 10 to 15 kt with gusts up to 20 kt, becoming W after midnight. Waves 2 ft or less. A chance of showers and tstms.
Fri..NW winds 10 to 15 kt with gusts up to 20 kt. Waves 2 ft or less.
Fri night..N winds 10 to 15 kt, becoming ne 5 to 10 kt after midnight. Waves 2 ft or less.
Sat..SE winds 5 to 10 kt. Waves 2 ft or less.
Sat night..S winds 10 to 15 kt, becoming sw after midnight. Waves 2 ft or less. A chance of showers.
Sun..W winds 5 to 10 kt. Waves 2 ft or less.
Sun night..W winds around 5 kt. Waves 2 ft or less. A chance of showers. Winds and waves higher in and near tstms.
ANZ400 615 Pm Edt Tue May 21 2019
Synopsis for the coastal waters from sandy hook nj to fenwick island de and for delaware bay.. High pressure will build into the area tonight and Wednesday bringing dry and pleasant weather. A warm front will pass through the area Wednesday night with a cold front arriving Thursday night into Friday morning. High pressure will again be nearby the area Friday and into Saturday. A cold front will likely cross the region late Saturday into early Sunday potentially stalling just our south towards the start of next week.
Synopsis for the coastal waters from sandy hook nj to fenwick island de and for delaware bay.. High pressure will build into the area tonight and Wednesday bringing dry and pleasant weather. A warm front will pass through the area Wednesday night with a cold front arriving Thursday night into Friday morning. High pressure will again be nearby the area Friday and into Saturday. A cold front will likely cross the region late Saturday into early Sunday potentially stalling just our south towards the start of next week.
7 Day Forecast for Marine Location Near Delaware City, DE
Hourly EDIT Helplocation: 39.57, -75.59 debug
Area Discussion for - Philadelphia/Mount Holly, PA
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus61 kphi 211945 afdphi area forecast discussion national weather service mount holly nj 345 pm edt Tue may 21 2019 Synopsis High pressure will build into the area tonight and Wednesday bringing dry and pleasant weather. A warm front will pass through the area Wednesday night with a cold front arriving Thursday night into Friday morning. High pressure will again be nearby the area Friday and into Saturday. A cold front will likely cross the region late Saturday into early Sunday potentially stalling just our south towards the start of next week. Near term until 6 am Wednesday morning We have measured at least a trace of rain 16 out of 21 days this month here at the office. For today... Plenty of blue sky. The wind today is probably the most noticeable when it comes to sensible weather. We're not as warm or as humid as yesterday, but the northwest winds behind last night's cold front have been gusting to 25 mph all day. All stat guidance and the NAM shut the winds down after sunset. The GFS is the outlier and keeps the gusts going into the evening hours. Surface high pressure will build into the region tonight as the mid- level ridge builds above it. We will see some cirrus track through the area, but clouds won't be thick. So with just a thin veil of cirrus at times and decreasing winds, lows tonight will bottom out in the 40s and lower 50s most places. Highly urbanized locales could stay in the mid 50s. No 30s expected, so not concerns with frost. Short term 6 am Wednesday morning through 6 pm Wednesday For tomorrow, the surface high will be centered across the region. The mid-level ridge axis will still be to our west. So at worst we are expecting an increase in mid-level clouds during the afternoon. The northwest winds will be much lighter tomorrow and turn more southerly southwesterly in the afternoon. Temperatures will be warmer tomorrow... About 3 to 7 degrees above today's highs. The normal high for philadelphia is 75... And that's what we're forecasting. Only a slight increase in dewpoints are expected tomorrow, so it will be comfortable. Long term Wednesday night through Tuesday Overview... the forecast philosophy for the long term remains mostly unchanged. A persistent combination of a western trough and a southeast ridge continue to dictate the CONUS pattern, with the mid-atlantic sitting on the northern periphery of the ridge. While there are some indications this may start to break towards next week, it appears this general configuration will likely carry us right through the long weekend and into early next week. The strength of the ridge will continue to favor near to above normal temperatures, though a couple of frontal passages and occasional onshore wind components will provide cooler air at times. As weather systems continue to regularly track northeast out of the plains (fueling continued severe weather there), we continue to see opportunities for air mass changes and associated showers and storms every two or three days. For the long term, the two potential areas of interest that stick out for impactful weather are Thursday evening and overnight, as well as late in the day on Saturday. In both of these cases, a cold front will be approaching the area, and both times we may have a threat of strong to severe storms. More details below. Dailies... Wednesday night-Thursday... A warm front should push through Wednesday night. Some showers are likely, and an elevated thunderstorm is also possible especially in the western half of the region. These could linger into Thursday morning. Otherwise, most of the daytime Thursday looks dry with temperatures warming above average and dew points also increasing significantly in the afternoon compared to much lower values in the morning. Thursday evening-night... Currently this looks to be the most active portion of the forecast period. On the synoptic level, everything looks about the same as it did yesterday. Low pressure currently moving northeastward out of the plains will make a hard turn to east as it nears the western great lakes. It then turns southeast as it rounds the top of the southeast ridge. Guidance is in good agreement on the surface low re-strengthening as it makes this turn, which will be accompanied by strengthening wind fields. All in all, what appears to develop over the mid-atlantic Thursday evening is a rather favorable environment for severe weather. The parameters not in question are wind shear and moisture. 0-6km shear rises near to above 50 kt during the evening and early overnight hours. SRH also looks quite impressive including in the lowest levels. For moisture, pwats look to surge towards 1.6-1.8 inches during the evening hours, with surface dew points well into the 60s. The main question mark is instability. To our west, strong instability in excess of 1500j kg of surface based CAPE is likely to build during the day. As night falls, a nocturnal inversion will probably start to develop, cutting off the surface based instability. However, elevated instability is likely to remain given steep mid-level lapse rates, so thunderstorms will probably be able to sustain themselves, though the damaging wind threat could decrease if a strong enough inversion forms. Spc has placed most of the area in a slight risk for severe weather on their day 3 outlook. While it's still a little early for specifics, |
this period bears close watching. Friday-Friday night... Behind the front, high pressure will be firmly in control for what looks like a warm and pleasant day Friday. Dry weather continues for the overnight. Saturday-Saturday night... High pressure should allow dry weather to continue for most of the day Saturday. A warm frontal passage, which currently looks like a dry front, is likely early on Saturday, which should set up a warm afternoon away from the coast where a lingering onshore wind will keep things cooler. By Saturday evening and overnight, the next cold front will be approaching as the parent low tracks through ontario. This will bring a renewed threat of showers and thunderstorms. The threat for strong storms appears lower here compared to Thursday night, but there could be some threat especially well away from the cooler coastal areas. SPC day 5 outlook is highlighting our far northwest zones for severe potential. Sunday-Sunday night... Sunday still looks to have a good chance to remain mostly dry, as the front should get just far enough south to put us in a true post-frontal air mass. It continues to look warm as well with winds turning offshore out of the west. Mid to upper 80s are likely in most areas. Still cannot completely rule out the front stalling a little closer, which would mean an afternoon shower or storm risk especially in southwestern portions of the region. Monday-Tuesday... Very low confidence as model timings are drastically different with the approach of the next frontal system. Best thinking at the moment is another fairly warm day on Monday with a late day shower or storm risk as a front approaches. This would yield drier weather for Tuesday. However, much fine tuning will need to be done here. Aviation 20z Tuesday through Sunday The following discussion is for kphl, kpne, kttn, kabe, krdg, kilg, kmiv, kacy and surrounding areas. Tonight... VFR. Northwest winds diminishing to 5 to 10 knots. Wednesday... VFR. Northwest winds 5 to 10 knots, becoming south or southwest in the afternoon. Outlook... Wednesday night-Thursday night... VFR or MVFR Wednesday night with a few showers possible. Most of the daytime Thursday should beVFR. Thunderstorms possible Thursday evening and overnight. Southwesterly winds shifting to northwesterly Thursday night. Gusts to 20 kt possible during the day Thursday. Friday-Friday night... VFR. Northwest wind gusting up to 20 kt, becoming northeasterly and decreasing Friday night. Saturday-Saturday night... VFR expected most of the day Saturday. Showers and thunderstorms possible Saturday evening and overnight. Winds gradually shifting from east to south on Saturday then south to west on Saturday night. Sunday... VFR. Light west-northwest wind. Marine Tonight... Sub-sca conditions with northwesterly winds 10 to 15 knots. Seas 2 to 3 feet. Wednesday... Sub-sca conditions with northwesterly winds 10 to 15 knots, subsiding to 5 to 10 knots and becoming southeast in the afternoon. Seas 1 to 2 feet. Outlook... Wednesday night-Sunday... A period of SCA conditions due to southwesterly winds gusting near to above 25 kt is possible Thursday afternoon and into the first part of the overnight. Otherwise, winds and seas are expected to remain below SCA criteria. Rip currents... a northwest wind with little to no sea breeze expected should result in a low risk. Equipment The kdix radar is back online. However, it will be in a test phase through this afternoon. Intermittent outages are possible. Phi watches warnings advisories Pa... None. Nj... None. De... None. Md... None. Marine... None. Synopsis... Kruzdlo near term... Kruzdlo short term... Kruzdlo long term... O'brien aviation... Kruzdlo o'brien marine... Kruzdlo o'brien equipment... Staff |
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 | 1 mi | 38 min | 1015.9 hPa | |||||
| DELD1 - 8551762 - Delaware City, DE | 1 mi | 44 min | NNW 8 G 14 | 69°F | 65°F | 1016.4 hPa | ||
| CHCM2 - 8573927 - Chesapeake City, MD | 12 mi | 38 min | NW 8 G 12 | 70°F | 71°F | 1016.8 hPa | ||
| MRCP1 - 8540433 - Marcus Hook, PA | 19 mi | 38 min | 71°F | 62°F | 1015.6 hPa | |||
| SJSN4 - 8537121 - Ship John Shoal, NJ | 22 mi | 38 min | NW 15 G 17 | 68°F | 68°F | 1016.2 hPa | ||
| PHBP1 - 8545240 - Philadelphia, PA | 35 mi | 38 min | 71°F | 62°F | 1015.2 hPa | |||
| BDSP1 | 39 mi | 38 min | 71°F | 65°F | 1015.6 hPa | |||
| TCBM2 - 8573364 - Tolchester Beach, MD | 43 mi | 38 min | NNW 12 G 13 | 68°F | 71°F | 1017.6 hPa | ||
| BRND1 - 8555889 - Brandywine Shoal Light, DE | 48 mi | 44 min | 1016.8 hPa |
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 | 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 |
| 1 day 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 |
| 2 days ago | S G14 | S G10 | SE G8 | SE | S G9 | S G7 | SE | SE | SW | SE | S | E | SE | E | E | SE G11 | S G12 | S G14 | S G14 | SE G13 | S G13 | SE G15 | S G13 | S 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 | 8 mi | 41 min | NNW 11 | 10.00 mi | Fair | 71°F | 42°F | 35% | 1016.7 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 | 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 |
| 1 day 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 |
| 2 days ago | S | S | S | S | SE | SE | SE | SE | S | SE | E | E | E | SE | S | SE | S | S | S | S | S | S | S | S |
Tide / Current Tables for Pea Patch Island, Bulkhead Shoal Channel, Chesapeake and Delaware Canal, Delaware
EDIT Weekend mode (on/off) (on/off) Help One Week of DataPea Patch Island
Click for Map
Tue -- 01:36 AM EDT 6.67 feet High Tide
Tue -- 05:43 AM EDT Sunrise
Tue -- 07:57 AM EDT Moonset
Tue -- 08:39 AM EDT 0.14 feet Low Tide
Tue -- 02:10 PM EDT 5.66 feet High Tide
Tue -- 08:14 PM EDT Sunset
Tue -- 08:37 PM EDT 0.65 feet Low Tide
Tue -- 11:08 PM EDT Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Tue -- 01:36 AM EDT 6.67 feet High Tide
Tue -- 05:43 AM EDT Sunrise
Tue -- 07:57 AM EDT Moonset
Tue -- 08:39 AM EDT 0.14 feet Low Tide
Tue -- 02:10 PM EDT 5.66 feet High Tide
Tue -- 08:14 PM EDT Sunset
Tue -- 08:37 PM EDT 0.65 feet Low Tide
Tue -- 11:08 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 |
| 5.6 | 6.5 | 6.6 | 5.8 | 4.6 | 3.3 | 2.3 | 1.3 | 0.4 | 0.2 | 1.1 | 2.6 | 4 | 5.1 | 5.6 | 5.4 | 4.4 | 3.2 | 2.2 | 1.4 | 0.8 | 0.7 | 1.6 | 3.2 |
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
Tue -- 03:07 AM EDT -2.33 knots Max Ebb
Tue -- 05:44 AM EDT Sunrise
Tue -- 06:56 AM EDT 0.02 knots Slack
Tue -- 07:58 AM EDT Moonset
Tue -- 09:56 AM EDT 2.36 knots Max Flood
Tue -- 01:41 PM EDT -0.08 knots Slack
Tue -- 03:55 PM EDT -1.54 knots Max Ebb
Tue -- 07:11 PM EDT 0.07 knots Slack
Tue -- 08:15 PM EDT Sunset
Tue -- 09:55 PM EDT 1.80 knots Max Flood
Tue -- 11:09 PM EDT Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Tue -- 03:07 AM EDT -2.33 knots Max Ebb
Tue -- 05:44 AM EDT Sunrise
Tue -- 06:56 AM EDT 0.02 knots Slack
Tue -- 07:58 AM EDT Moonset
Tue -- 09:56 AM EDT 2.36 knots Max Flood
Tue -- 01:41 PM EDT -0.08 knots Slack
Tue -- 03:55 PM EDT -1.54 knots Max Ebb
Tue -- 07:11 PM EDT 0.07 knots Slack
Tue -- 08:15 PM EDT Sunset
Tue -- 09:55 PM EDT 1.80 knots Max Flood
Tue -- 11:09 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 |
| -1 | -1.7 | -2.2 | -2.3 | -2.2 | -1.9 | -1.4 | 0.4 | 1.6 | 2.2 | 2.4 | 2.2 | 1.7 | 1.1 | -0.7 | -1.4 | -1.5 | -1.4 | -1 | -0.4 | 1 | 1.6 | 1.8 | 1.5 |
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.
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. |