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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 6:24AM | Sunset 6:34PM | Thursday March 21, 2019 6:19 PM AST (22:19 UTC) | Moonrise 7:25PM | Moonset 6:59AM | Illumination 99% |  |
AMZ725 Coastal Waters Of Southern Usvi Vieques And Eastern Puerto Rico Out 10 Nm- 346 Pm Ast Thu Mar 21 2019
Tonight..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Scattered showers.
Friday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Scattered showers.
Friday night..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 8 seconds. Isolated showers.
Saturday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 8 seconds. Isolated showers.
Saturday night..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 11 seconds. Scattered showers.
Sunday..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 10 seconds. Scattered showers.
Monday..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 10 seconds. East swell around 4 feet. Scattered showers.
Tuesday..Southeast winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 10 seconds. Isolated showers.
Tonight..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Scattered showers.
Friday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Scattered showers.
Friday night..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 8 seconds. Isolated showers.
Saturday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 8 seconds. Isolated showers.
Saturday night..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 11 seconds. Scattered showers.
Sunday..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 10 seconds. Scattered showers.
Monday..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 10 seconds. East swell around 4 feet. Scattered showers.
Tuesday..Southeast winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 10 seconds. Isolated showers.
AMZ700 346 Pm Ast Thu Mar 21 2019
Synopsis for puerto rico and the uS. Virgin islands waters... A surface high pressure across the northeast atlantic and a weak surface low pressure over the western atlantic will continue to promote a gentle to moderate east to southeast wind flow through Friday. Seas are forecast to build early next week as a new surface high pressure develops over the north central atlantic increasing the trade winds across the northeast caribbean.
Synopsis for puerto rico and the uS. Virgin islands waters... A surface high pressure across the northeast atlantic and a weak surface low pressure over the western atlantic will continue to promote a gentle to moderate east to southeast wind flow through Friday. Seas are forecast to build early next week as a new surface high pressure develops over the north central atlantic increasing the trade winds across the northeast caribbean.
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 212046 afdsju area forecast discussion national weather service san juan pr 446 pm ast Thu mar 21 2019 Synopsis A low-level trade wind perturbation is expected to affect the area tonight into the day on Friday, increasing the shower activity. A drier air mass is expected for Saturday, resulting in mostly fair weather conditions. Surface high pressure across the northeast atlantic will continue to maintain an east to southeast wind flow into the upcoming weekend. Short term Tonight through Saturday... a tranquil weather day was observed across the forecast area as a drier than normal air mass moved overhead and limited the shower activity significantly. Conditions, however, are about to change somewhat tonight into the day on Friday as a low-level trade wind perturbation will move overhead. This will increase the precipitable water values to between 1.3 and 1.4 inches, which is around the normal for this time of the year. Therefore, an increase in scattered shower activity is expected across portions of the usvi later this evening and then across portions of eastern and southeastern pr during the overnight into the morning hours of Friday. Then during the afternoon hours of Friday, showers are expected to develop across the northwest quadrant of pr, where activity could be somewhat enhanced due to daytime heating and sea breeze convergence. Showers in the form of streamers are also possible across the san juan metro area during the afternoon hours given that the low-level flow is expected to be unidirectional from the southeast. At this moment, the main hazard with the shower activity is expected to be ponding of water on roadways and in low-lying and poor drainage areas. Conditions will then improve significantly by Friday night into the day on Saturday as once again a drier than normal air mass moves overhead with precipitable water values to drop below 1 inch. This promises to promote mostly fair weather conditions across the area. A few showers, however, cannot be ruled out across eastern areas during the overnight and early morning hours followed by a few showers across western pr during the afternoon hours. Overall, a pleasant weather day is expected for Saturday. Long term Sunday through Friday... issued 448 am ast Thu mar 21 2019 an induced trough is forecast to move across the local caribbean waters on Sunday. As a result, the moisture will surge across the islands supporting scattered showers at times. At that time, the |
upper level support is weak therefore no significant rainfall accumulations are anticipated late in the weekend. GFS ensemble mean show a front stalling north of the islands and a surface high pressure moving over the north central atlantic on Monday. The induced southeasterly flow will promote additional moisture transport across the u.S. Virgin islands and puerto rico. Under this pattern, wet trades winds will bring patches of moisture from time to time resulting in a few rounds of scattered showers across the local islands early next week. Then, a potent low pressure system moves over the western atlantic by midweek pushing its associated front closer to the region the second part of the week. All in all, next week looks wetter and it is coinciding with favorable mjo conditions across the basin. Aviation MainlyVFR conditions will persist across all terminals. Shra and increased cloud cover will bring sct occasional bkn between fl020-040 and vcsh resulting in brief MVFR conditions at tncm tkpk through at least 22 00z. A few vcsh possible across tjbq and tjmz through 21 23z. Sct occasional bkn between fl025-040 during this period. E-se winds between 10-15 knots with sea breeze variations through 21 22z, becoming light and variable afterwards. Marine Marine conditions will continue to remain in fairly good shape with seas expected to range between 2 and 5 feet with east to southeast winds up to 15 knots during the next few days. An increase in seas is expected by late Sunday into early next week as an increase in the easterly trade winds is expected due to a surface high pressure moving over the western atlantic. For beachgoers, a moderate risk of rip currents is expected for the north-facing beaches of puerto rico, culebra, saint thomas, and cramer park in saint croix and across portions of the north and south-facing beaches of vieques through Friday. Elsewhere, the rip current risk will be low. Preliminary point temps pops Sju 89 74 86 74 20 40 40 10 stt 85 75 84 73 30 40 20 20 Sju watches warnings advisories Pr... None. Vi... None. Am... None. Short term... Gl long term... .From previous discussion |
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 |
| ESPP4 - 9752695 - Esperanza, PR | 2 mi | 38 min | ESE 7 G 11 | 80°F | 81°F | 1013.8 hPa | ||
| 41056 | 10 mi | 50 min | ESE 9.7 G 12 | 79°F | 1013.2 hPa | |||
| CLBP4 - 9752235 - Culebra, PR | 15 mi | 38 min | 86°F | 82°F | 1014.4 hPa | |||
| YABP4 - 9754228 - Yabucoa Harbor, PR | 20 mi | 32 min | 83°F | 70°F | ||||
| CHAV3 - 9751639 - Charlotte Amalie, VI | 32 mi | 38 min | 80°F | 1014.1 hPa | ||||
| 41052 - South of St. John, Virgin Islands | 38 mi | 50 min | ESE 12 G 14 | 80°F | 1013.2 hPa | |||
| LAMV3 | 41 mi | 32 min | 79°F | 83°F | ||||
| 41053 - San Juan, PR | 42 mi | 50 min | E 16 G 18 | 81°F | 1012.5 hPa | |||
| JOXP4 - Jobos Bay Reserve, Puerto Rico | 42 mi | 95 min | ESE 8 | 82°F | 1015 hPa | 66°F | ||
| SJNP4 - 9755371 - San Juan, PR | 42 mi | 38 min | E 13 G 18 | 81°F | 80°F | 1013.5 hPa | ||
| CHSV3 - 9751364 - Christiansted Harbor, Virgin Islands | 48 mi | 38 min | NE 5.1 G 12 | 80°F | 80°F | |||
| LTBV3 - 9751401 - Lime Tree Bay, VI | 48 mi | 32 min | SSE 2.9 G 8.9 | 80°F | 82°F | 1015.2 hPa |
Wind History for Isabel Segunda, Vieques Island, PR
(wind in knots) EDIT (on/off) Help| Last 24hr | ||||||||||||||||||||||||
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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 DataTide / Current data from XTide NOT FOR NAVIGATION
Tide / Current Tables for Vieques Passage, Puerto Rico Current
EDIT (on/off) Help One Week of DataVieques Passage
Click for Map
Thu -- 02:02 AM AST -0.00 knots Slack
Thu -- 05:13 AM AST -0.84 knots Max Ebb
Thu -- 06:25 AM AST Sunrise
Thu -- 06:59 AM AST Moonset
Thu -- 08:25 AM AST 0.00 knots Slack
Thu -- 11:24 AM AST 0.76 knots Max Flood
Thu -- 02:24 PM AST -0.00 knots Slack
Thu -- 05:34 PM AST -0.82 knots Max Ebb
Thu -- 06:33 PM AST Sunset
Thu -- 07:25 PM AST Moonrise
Thu -- 08:41 PM AST 0.00 knots Slack
Thu -- 11:48 PM AST 0.83 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Thu -- 02:02 AM AST -0.00 knots Slack
Thu -- 05:13 AM AST -0.84 knots Max Ebb
Thu -- 06:25 AM AST Sunrise
Thu -- 06:59 AM AST Moonset
Thu -- 08:25 AM AST 0.00 knots Slack
Thu -- 11:24 AM AST 0.76 knots Max Flood
Thu -- 02:24 PM AST -0.00 knots Slack
Thu -- 05:34 PM AST -0.82 knots Max Ebb
Thu -- 06:33 PM AST Sunset
Thu -- 07:25 PM AST Moonrise
Thu -- 08:41 PM AST 0.00 knots Slack
Thu -- 11:48 PM AST 0.83 knots Max Flood
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 |
| 0.7 | 0.4 | 0 | -0.4 | -0.7 | -0.8 | -0.8 | -0.5 | -0.2 | 0.2 | 0.6 | 0.7 | 0.7 | 0.5 | 0.2 | -0.2 | -0.6 | -0.8 | -0.8 | -0.6 | -0.3 | 0.1 | 0.5 | 0.8 |
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.
Link to Loop
Other links: Northern Pacific Contential US Full GOES-East
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. |