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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 6:01AM | Sunset 6:41PM | Thursday April 19, 2018 5:26 AM AST (09:26 UTC) | Moonrise 9:03AM | Moonset 10:25PM | Illumination 16% |  |
Marine Forecasts
EDIT (on/off) Help| AMZ725 Coastal Waters Of Southern Usvi Vieques And Eastern Puerto Rico Out 10 Nm- 353 Am Ast Thu Apr 19 2018 .small craft should exercise caution... Today..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 14 seconds. Northeast swell 4 to 5 feet. Scattered showers. Tonight..East winds 10 to 15 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 13 seconds. East swell 4 to 5 feet. Isolated showers. Friday..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 12 seconds. East swell 4 to 5 feet. Scattered showers. Friday night..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 11 seconds. East swell around 4 feet. Scattered showers. Saturday..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 11 seconds. East swell around 4 feet. Scattered showers. Sunday..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 11 seconds. Southeast swell around 4 feet. Scattered showers. Monday..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 10 seconds. East swell around 4 feet. Isolated showers. | AMZ700 353 Am Ast Thu Apr 19 2018 Synopsis for puerto rico and the uS. Virgin islands waters... A moderate east to southeast wind flow will prevail today across the regional waters...becoming more easterly and locally fresh into the weekend. A long period northeast swell will move across the local waters on Thursday and slowly subside through Friday. Isolated Thunderstorms are expected on Thursday across portions of the local 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 190259 cca afdsju area forecast discussion... Corrected national weather service san juan pr 1059 pm ast Wed apr 18 2018 Update Showers and thunderstorms moved across portions of the interior, northeast, northern and western puerto rico this afternoon. These showers and thunderstorms produced one to two inches of rain across the area mentioned above. As a result urban and small stream flood advisories were issued. At this time the showers have dissipated over land and only remain across the local waters. This is expected to continue through the overnight period. Showers and isolated thunderstorms are expected to increase over the u.S. Virgin islands during the morning, and then start across puerto rico during the afternoon. Once again these showers and thunderstorms could produce brief heavy rain with lightning which could cause urban and small stream flooding. Some noticeable changes with the GFS model are in the recent cross-section for san juan which shows drier air from 850 mb to 700 mb. This area is drier than the last couple of runs of the gfs. This drier air could limit shower development across the region tomorrow and make shower activity less widespread. Aviation Vrf conditions are expected to prevail for all terminals through 19 15z. Shra tsra are possible by 19 15z across terminals tjsj, tjbq, and tjmz. Some shra tsra could cause vsby to fall to MVFR conditions. Sfc winds east southeast ranging 5 to 10 kts. Marine Seas across the outer atlantic and caribbean waters will reach 7 feet on Thursday due to a northerly swell moving across the waters. Other waterways will see seas ranging from 3 to 5 feet with east southeast winds 10 to 16 kts. A high risk of rip currents is in effect at 6 am Thursday for the northern, eastern and southern beaches of puerto rico as well as the beaches of culebra, vieques, and st. Croix. Prev discussion issued 440 pm ast Wed apr 18 2018 synopsis... A surface trough will continue to move across the region tonight. Showers and thunderstorms are expected to diminish this evening, but periods of heavy rainfall and thunderstorms are expected again on Thursday afternoon. Drier mid levels are expected Friday through early next week. However, diurnally induced afternoon showers with possible isolated thunderstorms are expected each day across western pr. Elsewhere, passing showers and light rainfall amounts are expected. Short term... Tonight through Friday... showers and thunderstorms developed early this afternoon just to the north of cordillera central and along the northern sections of puerto rico. This activity was associated with the combination of daytime heating, local effects and the nearness of an induced surface trough. This activity is expected to decrease over land areas late this afternoon. For the overnight and Thursday morning hours, scattered showers will move occasionally across the u.S. Virgin islands, vieques, culebra as well as across the eastern sections of puerto rico. Moisture is expected to increase again across puerto rico Thursday afternoon as the remnants moisture of the trough remains close to the region with showers and thunderstorm activity expected across interior, western and part of the metropolitan. Urban and small stream flooding is possible with |
this activity. Latest satellites images as well as model guidance indicated that dry air will move across the u.S. Virgin islands Thursday afternoon. This drier air will move across puerto rico by Friday. However, the combination of daytime heating and local effects will continue to bring scattered showers, isolated thunderstorms and localized urban and small stream flooding across western and interior puerto rico as well as scattered showers to areas southeast of the main islands, including saint croix Friday and during the upcoming weekend. Long term... Saturday through Wednesday... From previous discussion... a broad surface high pressure will continue across the eastern atlantic promoting moderate trades. Drier mid level air is expected to prevail during the long term period. However, a typical weather pattern will prevail each day with afternoon convection developing over the western interior sections of puerto rico and streamers forming off the smaller islands. A short wave trough will move close on Sunday, enhancing shower and thunderstorm development during the afternoon and some showers will linger through the evening hours across portions of western coastal waters. Aviation... Periods of MVFR conds likely in and around jmz jbq in shra tsra and possibly jsj through 18 22z. Easterly winds around 12 knots with some sea breeze variations becoming light and variable overnight. Passing showers and isolated tstorms in and around usvi terminals overnight. Across leeward terminals,VFR to continue. Marine... A long period northeasterly swell will move across the local waters on Thursday. This will cause seas to increase around 7 feet mainly across the offshore atlantic and caribbean waters as well across the anegada and mona passage. Therefore, small craft advisories will be in effect. Also, life threatening rip currents are expected along the atlantic beaches of puerto rico and portions of the southern coast of the island as well across st thomas, vieques and st. Croix. Meanwhile seas will continue to range between 3-6 feet tonight and winds will prevail from the east to southeast at 10-15 knots. Preliminary point temps pops Sju 74 86 75 87 50 40 20 40 stt 76 85 75 86 70 20 10 30 Sju watches warnings advisories Pr... High rip current risk from 6 am ast Thursday through late Thursday night for central interior-culebra-north central- northeast-northwest-ponce and vicinity-san juan and vicinity-southeast-vieques-western interior. Vi... High rip current risk from 6 am ast Thursday through late Thursday night for st croix. Am... High rip current risk from 6 am ast Thursday through late Thursday night for coastal waters of southern puerto rico out 10 nm. Small craft advisory from 8 pm Thursday to 6 pm ast Friday for caribbean waters of puerto rico from 10 nm to 17n-mona passage southward to 17n. Small craft advisory from 8 am Thursday to 6 pm ast Friday for anegada passage southward to 17n-atlantic waters of puerto rico and usvi from 10 nm to 19.5n. Short term... 99 long term... .99 |
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 |
| 41056 | 10 mi | 57 min | ESE 16 G 21 | 80°F | 1017.3 hPa | |||
| CLBP4 - 9752235 - Culebra, PR | 15 mi | 45 min | 79°F | 81°F | 1017.5 hPa | |||
| YABP4 - 9754228 - Yabucoa Harbor, PR | 20 mi | 39 min | 81°F | |||||
| 41052 - South of St. John, Virgin Islands | 38 mi | 57 min | E 16 G 19 | 80°F | 1016.5 hPa | |||
| LAMV3 | 41 mi | 39 min | 79°F | 80°F | ||||
| SJNP4 - 9755371 - San Juan, PR | 42 mi | 45 min | 78°F | 80°F | 1017.6 hPa | |||
| JOXP4 - Jobos Bay Reserve, Puerto Rico | 42 mi | 102 min | NE 2.9 | 77°F | 1017 hPa | 71°F | ||
| 41053 - San Juan, PR | 42 mi | 57 min | ESE 12 G 16 | 79°F | 1016.6 hPa | |||
| CHSV3 - 9751364 - Christiansted Harbor, Virgin Islands | 48 mi | 45 min | E 2.9 G 8 | 78°F | 81°F | 1019 hPa | ||
| LTBV3 - 9751401 - Lime Tree Bay, VI | 48 mi | 39 min | SE 7 G 14 | 80°F | 82°F | 1018.7 hPa |
Wind History for Isabel Segunda, Vieques Island, PR
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Airport Reports
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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 Thu -- 06:02 AM AST Sunrise Thu -- 09:03 AM AST Moonrise Thu -- 02:51 PM AST -0.12 feet Low Tide Thu -- 06:39 PM AST Sunset Thu -- 10:24 PM AST Moonset Thu -- 11:55 PM AST 0.79 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 |
| 0.8 | 0.7 | 0.7 | 0.6 | 0.6 | 0.5 | 0.5 | 0.5 | 0.4 | 0.4 | 0.3 | 0.2 | 0.1 | -0 | -0.1 | -0.1 | -0.1 | -0 | 0.1 | 0.3 | 0.4 | 0.6 | 0.7 | 0.8 |
Tide / Current Tables for Vieques Passage, Puerto Rico Current
EDIT (on/off) Help One Week of Data| Vieques Passage Click for Map Thu -- 01:03 AM AST 0.85 knots Max Flood Thu -- 04:15 AM AST -0.00 knots Slack Thu -- 06:02 AM AST Sunrise Thu -- 07:44 AM AST -0.97 knots Max Ebb Thu -- 09:04 AM AST Moonrise Thu -- 11:25 AM AST 0.00 knots Slack Thu -- 02:04 PM AST 0.55 knots Max Flood Thu -- 04:56 PM AST -0.00 knots Slack Thu -- 06:40 PM AST Sunset Thu -- 07:44 PM AST -0.53 knots Max Ebb Thu -- 10:24 PM AST 0.00 knots Slack Thu -- 10:25 PM AST Moonset 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 | 0.8 | 0.8 | 0.5 | 0.1 | -0.3 | -0.7 | -0.9 | -1 | -0.8 | -0.5 | -0.2 | 0.2 | 0.5 | 0.5 | 0.5 | 0.3 | -0 | -0.3 | -0.5 | -0.5 | -0.4 | -0.1 | 0.2 |
Weather Map and Satellite Images
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GOES Local Image of Puerto Rico 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 (5,6,7,8)
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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. |