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Marine Weather and Tides
Version 3.4 |
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. 5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds. |
| Sunrise 5:56AM | Sunset 7:02PM | Friday July 21, 2017 6:45 PM AST (22:45 UTC) | Moonrise 3:59AM | Moonset 5:23PM | Illumination 3% |  |
Marine Forecasts
EDIT (on/off) Help| AMZ725 Coastal Waters Of Southern Usvi Vieques And Eastern Puerto Rico Out 10 Nm- 336 Pm Ast Fri Jul 21 2017 Tonight..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 8 seconds. Scattered showers. Saturday..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 8 seconds. Numerous showers through the day. Isolated Thunderstorms in the afternoon. Saturday night..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 8 seconds. Scattered showers and isolated Thunderstorms. Sunday..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 8 seconds. Isolated Thunderstorms in the morning. Scattered showers through the day. Sunday night..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Isolated showers. Monday..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Isolated showers. Tuesday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Scattered showers. Wednesday..East winds 10 to 15 knots. Seas 1 to 3 feet. Dominant period 7 seconds. Scattered showers. | AMZ700 336 Pm Ast Fri Jul 21 2017 Synopsis for puerto rico and the uS. Virgin islands waters... A broad surface high pressure across the central atlantic will continue to promote moderate to locally fresh easterly trade winds through at least Tuesday. Small craft operators should continue to exercise caution due to choppy marine conditions until winds and seas subside on Saturday. A tropical wave is forecast to enter the eastern caribbean on Saturday, increasing shower and Thunderstorm activity across the regional waters. |
7 Day Forecast for Marine Location Near Esperanza, PR
Hourly EDIT Helplocation: 18.12, -65.46 debug
Area Discussion for - San Juan, PR
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxca62 tjsj 212016 afdsju area forecast discussion national weather service san juan pr 416 pm ast Fri jul 21 2017 Synopsis Moisture will ramp up during the day Saturday ahead of a tropical wave expected to cross through the u.S. Virgin islands Saturday evening and puerto rico overnight Saturday into Sunday. Then somewhat drier air and some saharan dust will move over the area early next week. Moisture will increase on Wednesday and again Thursday afternoon and evening with the passage of the next tropical wave. Short term Tonight through Monday at upper levels, winds remain light as low pressure over the bahama islands gives way to a high pressure north northeast of the area on Sunday. The main features in the met picture today are the high pressure that continues driving moderate to fresh easterly trade winds across the area and the approaching tropical wave now just east of 60 west as evidenced by an area of convection at its apex near 22 north 58 west. Moisture will increase ahead of the wave on Saturday increasing showers and thunderstorms, and then cross through the area on Saturday night. The best divergence aloft will also occur over puerto rico between midnight Sunday and Sunday morning before 10 am ast. Therefore we may have some atypical (at least for this season so far) thunderstorms in the early morning hours across eastern puerto rico and possibly the u.S. Virgin islands. Although drier air follows on Sunday, enough residual moisture is expected to keep good shower activity going in western puerto rico until Sunday evening. Showers will begin to taper off in the morning for the u.S. Virgin islands and in the afternoon in eastern puerto rico. Although moisture reaches a minimum for the next several days on Monday evening, showers will continue since that minimum columnar moisture is still around 1.65 inches. Long term Tuesday through Friday moisture will wrap around a 700 mb high north of us on Sunday and |
return to the area from the northeast early Tuesday morning. Then a brief dry slot on Wednesday night will herald the arrival of another tropical wave from the east southeast Thursday and Thursday afternoon. Moisture associated with this wave will continue into the following weekend. Although the tutt low forming to our northeast next week will move west, it will generally be too far away to be of much effect. However a very weak low will move in early next weekend and could increase the frequency of thunderstorms Friday and Saturday of next week as it interacts with the increased moisture from the tropical wave. Aviation Mount obscurations expected to cont across the interior and western sections of pr til 21 23z. Shra expected at tjmz and in the vcty of tjbq til 21 23z. Dry air expected to move in over the usvi, with vcsh elsewhere. Northerly winds at 15 to 20 knots with gusty winds in near shra, then decreasing at 10 kts or less btwn 21 23z-22 12z, but increasing once again at 15kt aft 22 13z. Winds alf less than 20 knots aft 21 21z and E to ese blo fl280. Marine After tonight maritime conditions are expected to remain at 5 feet or less through the last weekend of july. And during that time no small craft advisories are expected. However, vigorous thunderstorms will be capable of generating, in their immediate vicinity, local seas of 7 feet or better during the passage of the tropical waves. Preliminary point temps pops Sju 80 88 78 90 40 60 50 40 stt 80 90 80 87 40 70 40 30 Sju watches warnings advisories Pr... None. Vi... None. Am... None. Short term... Cam long term... .Ws |
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 |
| VQSP4 - 9752619 - Isabel Segunda, Vieques, PR | 2 mi | 45 min | ESE 6 G 8.9 | 86°F | ||||
| ESPP4 - 9752695 - Esperanza, PR | 2 mi | 45 min | ESE 8.9 G 13 | 84°F | 85°F | 1015.9 hPa (+0.4) | ||
| 41056 | 10 mi | 45 min | E 12 G 14 | 84°F | 3 ft | 1015.9 hPa (+0.4) | ||
| CLBP4 - 9752235 - Culebra, PR | 15 mi | 45 min | 87°F | 85°F | 1016.1 hPa (+0.4) | |||
| FRDP4 - 9753216 - Fajardo, PR | 17 mi | 45 min | ENE 11 G 14 | 84°F | 75°F | |||
| YABP4 - 9754228 - Yabucoa Harbor, PR | 20 mi | 45 min | ENE 8 G 11 | 86°F | ||||
| CHAV3 - 9751639 - Charlotte Amalie, VI | 32 mi | 45 min | ENE 5.1 G 9.9 | 85°F | 85°F | |||
| 41052 - South of St. John, Virgin Islands | 38 mi | 45 min | E 14 G 18 | 85°F | 84°F | 5 ft | 1014.5 hPa (-0.0) | |
| LAMV3 | 41 mi | 45 min | 84°F | 85°F | ||||
| JOXP4 - Jobos Bay Reserve, Puerto Rico | 42 mi | 60 min | E 5.1 | 86°F | 1016 hPa | 75°F | ||
| 41053 - San Juan, PR | 42 mi | 45 min | E 16 G 19 | 84°F | 84°F | 5 ft | 1015.5 hPa (+0.5) | |
| SJNP4 - 9755371 - San Juan, PR | 42 mi | 45 min | E 15 G 21 | 84°F | 85°F | 1016.2 hPa (+0.5) | ||
| LTBV3 - 9751401 - Lime Tree Bay, VI | 48 mi | 45 min | ESE 5.1 G 11 | 85°F | 85°F | 1016.6 hPa (-0.0) | ||
| CHSV3 - 9751364 - Christiansted Harbor, Virgin Islands | 48 mi | 45 min | ENE 5.1 G 8.9 | 85°F | 85°F | 1015.8 hPa (-0.0) |
Wind History for Isabel Segunda, Vieques Island, PR
(wind in knots) EDIT (on/off) Help| 8 PM | -12 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 | E G10 | E G11 | E G9 | E G15 | E G9 | E G10 | E G11 | E | SE G6 | SE G9 | E | SE | SE | E G9 | E G14 | E G13 | E G14 | E G11 | E G16 | E G12 | E G11 | E G13 | E G9 | |
| 1 day ago | E G12 | E G7 | E G11 | E G8 | E G8 | E G10 | E G9 | E G13 | E G8 | E G7 | E G10 | E G7 | E G9 | E G12 | E G12 | E G11 | NE G14 | NE G12 | E G8 | NE G16 | E G15 | E G11 | E G16 | E G11 |
| 2 days ago | SE G10 | SE G8 | SE G11 | E G11 | SE G6 | SE G9 | SE G8 | E G16 | SE G7 | E | E | E G11 | E G11 | E G15 | E G12 | E G15 | E G13 | E G17 | E G11 | E G11 | NE G17 | E G18 | E G12 | E G9 |
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airportsClick EDIT to select an airport
Tide / Current Tables for Vieques Island, Puerto Rico
EDIT RT Ports Option Weekend mode (on/off) (on/off) Help One Week of Data| Vieques Island Click for Map Fri -- 03:58 AM AST Moonrise Fri -- 05:56 AM AST Sunrise Fri -- 11:12 AM AST -0.22 feet Low Tide Fri -- 05:23 PM AST Moonset Fri -- 06:59 PM AST Sunset Fri -- 09:00 PM AST 0.91 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 |
| 0.7 | 0.6 | 0.6 | 0.5 | 0.4 | 0.4 | 0.2 | 0.1 | -0 | -0.1 | -0.2 | -0.2 | -0.2 | -0.1 | 0 | 0.2 | 0.4 | 0.6 | 0.7 | 0.8 | 0.9 | 0.9 | 0.9 | 0.8 |
Tide / Current Tables for Vieques Passage, Puerto Rico Current
EDIT (on/off) Help One Week of Data| Vieques Passage Click for Map Fri -- 03:03 AM AST -0.98 knots Max Ebb Fri -- 03:59 AM AST Moonrise Fri -- 05:57 AM AST Sunrise Fri -- 06:53 AM AST 0.00 knots Slack Fri -- 09:20 AM AST 0.46 knots Max Flood Fri -- 11:58 AM AST -0.00 knots Slack Fri -- 02:52 PM AST -0.53 knots Max Ebb Fri -- 05:23 PM AST Moonset Fri -- 05:31 PM AST 0.00 knots Slack Fri -- 07:00 PM AST Sunset Fri -- 09:09 PM AST 0.94 knots Max Flood 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 | -0.6 | -0.9 | -1 | -0.9 | -0.7 | -0.3 | 0 | 0.3 | 0.5 | 0.4 | 0.3 | -0 | -0.3 | -0.5 | -0.5 | -0.4 | -0.2 | 0.2 | 0.5 | 0.8 | 0.9 | 0.9 | 0.6 |
Weather Map and Satellite Images
(on/off) HelpWeather Map | IR Satellite Image from GEOS GOES Local Image of Puerto Rico EDIT  |
Wind Forecast for (18,4,5,8)
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Ground Weather Radar Station Puerto Rico,Virgin Islands
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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. |