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Marine Weather and Tides
Version 3.4 |
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports. 6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen |
| Sunrise 6:05AM | Sunset 6:43PM | Monday August 26, 2019 5:03 AM AST (09:03 UTC) | Moonrise 1:57AM | Moonset 3:30PM | Illumination 18% |  |
AMZ725 Coastal Waters Of Southern Usvi Vieques And Eastern Puerto Rico Out 10 Nm- 431 Am Ast Mon Aug 26 2019
Today..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated showers.
Tonight..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 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.
Tuesday night.. Tropical storm conditions possible. East winds 15 to 20 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Scattered showers through the night. Isolated Thunderstorms after midnight.
Wednesday.. Tropical storm conditions possible. Southeast winds 15 to 20 knots. Seas 5 to 7 feet with occasional seas up to 9 feet. Dominant period 8 seconds. Showers and isolated Thunderstorms.
Wednesday night.. Tropical storm conditions possible. Southeast winds 10 to 15 knots. Seas 5 to 7 feet with occasional seas up to 9 feet. Dominant period 7 seconds. Showers and isolated Thunderstorms.
Thursday..Southeast winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Scattered showers and isolated Thunderstorms.
Thursday night..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Numerous showers and isolated Thunderstorms.
Friday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 8 seconds. Isolated Thunderstorms in the morning. Scattered showers through the day.
Today..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated showers.
Tonight..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 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.
Tuesday night.. Tropical storm conditions possible. East winds 15 to 20 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Scattered showers through the night. Isolated Thunderstorms after midnight.
Wednesday.. Tropical storm conditions possible. Southeast winds 15 to 20 knots. Seas 5 to 7 feet with occasional seas up to 9 feet. Dominant period 8 seconds. Showers and isolated Thunderstorms.
Wednesday night.. Tropical storm conditions possible. Southeast winds 10 to 15 knots. Seas 5 to 7 feet with occasional seas up to 9 feet. Dominant period 7 seconds. Showers and isolated Thunderstorms.
Thursday..Southeast winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Scattered showers and isolated Thunderstorms.
Thursday night..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Numerous showers and isolated Thunderstorms.
Friday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 8 seconds. Isolated Thunderstorms in the morning. Scattered showers through the day.
AMZ700 431 Am Ast Mon Aug 26 2019
Synopsis for puerto rico and the uS. Virgin islands waters... A surface high pressure over the north central atlantic will continue to promote a moderate east to southeast wind flow through today. Drier dusty air will continue through tomorrow associated with somewhat stronger winds. Weather and marine conditions are forecast to deteriorate by midweek as tropical storm dorian moves west across the caribbean sea.
Synopsis for puerto rico and the uS. Virgin islands waters... A surface high pressure over the north central atlantic will continue to promote a moderate east to southeast wind flow through today. Drier dusty air will continue through tomorrow associated with somewhat stronger winds. Weather and marine conditions are forecast to deteriorate by midweek as tropical storm dorian moves west across the caribbean sea.
7 Day Forecast for Marine Location Near Vieques, PR
Hourly EDIT Helplocation: 18.15, -65.43 debug
Area Discussion for - San Juan, PR
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxca62 tjsj 260113 afdsju area forecast discussion national weather service san juan pr 913 pm ast Sun aug 25 2019 Update Only minor changes were made to the weather forecast to include haze on Monday morning and afternoon. Saharan dust will continue across the area resulting in hazy skies. The 26 00z tjsj sounding shows precipitable waters of only 1.30 inches and a strong inversion at 850 mb and another one around 500 mb. In addition, goes precipitable water satellite derived product shows a large air mass of drier air east of the islands. Therefore, mainly fair weather is expected to continue for the beginning of the workweek. However, a few patches of moisture embedded in the trade winds could carry passing showers across the eastern half of the forecast area during the nighttime and early morning hours with afternoon convection developing across western puerto rico due to strong diurnal heating. After that, our attention is shifted toward tropical storm dorian, currently located about 900 miles east-southeast of the region. The latest forecast from the national hurricane center shows this system moving south of puerto rico and the u.S. Virgin islands on Wednesday and Thursday. The confidence in the forecast is low at this time and any changes in the track and intensity of the system will result in adjustments to the local impacts. Regardless, expect periods of showers and thunderstorms, along with gusty winds and hazardous marine conditions on Wednesday and Thursday. Aviation Vfr conditions are expected to continue for most of the forecast period. Hz due to saharan dust is expected on the area through Monday, but visibilities are expected to remain at p6sm. Vcsh are expected for tjmz tjbq after 26 17z. The tjsj 26 00z sounding shows fl050 winds out of the east at 10 to 17 knots. Marine Seas up to 5 feet and winds up to 20 knots are expected to continue across the local waters. Therefore, small craft operators are urged to exercise caution. There is a moderate risk of rip currents for most of the beaches along the northern coast of puerto rico and the eastern tip of st. Croix in the u.S. Virgin islands. Seas will become hazardous by the middle of the workweek as tropical storm dorian approaches the local islands. Prev discussion issued 129 pm ast Sun aug 25 2019 synopsis... fairly calm weather is expected for the next several days due to a saharan air layer that will be with us through Tuesday. Minimal shower activity is likely during this period. Thereafter, ample rainfall will occur with the coming of what is now tropical storm dorian. Though there is substantial uncertainty in the track and intensity of this storm, the vast majority of forecast models put the storm to the south of puerto rico, with the intensity at or less than tropical storm strength. However, its plume of moisture will still impact the region, with rain beginning Wednesday and lasting into Friday. Short term... Today through Tuesday... only a few light passing showers were noted mainly over the coastal waters during the late morning hours, with limited or no shower activity observed or reported over land areas. A drier airmass accompanying the saharan air layer with widespread suspended saharan dust particulates is expected to spread across the region through early Tuesday. This will promote increasingly hazy conditions and overall fair weather skies. However pockets of residual moisture across the islands along with local effects and daytime heating may still lead to afternoon shower development across portions of puerto rico and just down stream of the adjacent islands under the dominant easterly wind flow. |
Recent tjsj 245 12z upper air sounding showed diminishing layered precipitable water value now down to 1.57 inches with a continued decline expected through Monday based on latest GFS model guidance and the tjsj forecast sounding. Overall model guidance continued to suggest limited shower activity at least through Tuesday, as a result of, a dry stable air mass. Therefore expect overall fair weather with hazy skies to prevail through Tuesday with limited shower activity across the adjacent islands and puerto rico. However, development of a few showers can't be ruled out, as a result of, diurnal heating and local effects each afternoon mainly over the interior and western areas of puerto rico and on the west end and downstream of the u.S. Virgin islands. Long term... Wednesday through Sunday... our weather will become much more active for the rest of the workweek as tropical storm dorian enters the caribbean. At this point, confidence is increasing that this storm will pass to the south of puerto rico beginning Wednesday morning. Given its trajectory of moving west northwest, this storm is expected to impact the dominican republic by Thursday. The intensity forecast is more difficult, as there are many factors at play. Sea surface temperatures are very ideal for further development and organization. However, ample dry air and wind shear over the caribbean will create a hostile environment for strengthening. Thus, this system is expected to pass by to our south, likely as a tropical storm or weaker. Regardless of uncertainties to the forecasted track and intensity, our region will still be impacted by this storm. The moisture plume is expected to move into the uvsi and pr by Wednesday morning and into the afternoon. Plenty of rainfall is likely with this system, though it is too soon to estimate rainfall amounts. The likely impacts of this system will be: heavy rain, urban and small stream flooding, and thunderstorms with gusty winds and frequent lightning. The moisture looks to impact us especially Wednesday, but possibly through Friday. Saturday and Sunday looks drier, but with an upper tropospheric trough forecasted to be to our north, it remains to be seen how that might work to enhance shower activity over the region for the end of the week. Aviation... vfr cond will continue thru fcst prd. Isold-sct shra may develop in and around tjbq and tjmz fm 25 18z-25 22z. Incr hz alqds across usvi and pr with arrival of suspended saharan dust particulates across the local flying area... But so far no restrictions to flight vsby fcst. Sfc wind from e-se 10 to 15 kts with higher gusts bcmg 10 kts or less aft 25 22z. Marine... with the drier air and saharan dust settling over the region for the next several days, tranquil yet hazy conditions are expected through Tuesday. Moderate to locally fresh winds are expected from the east, with seas up to 5 feet. There is a moderate risk for rip currents for most local beaches for puerto rico and the usvi for the next few days. Thereafter into Wednesday, tropical storm dorian is expected to pass to our south, and will likely deteriorate marine cointon's through Thursday. Preliminary point temps pops Sju 81 90 79 88 20 20 20 30 stt 81 90 79 91 20 20 20 30 Sju watches warnings advisories Pr... None. Vi... None. Am... None. Short term... Erg long term... .Ds |
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 | 4 mi | 45 min | E 7 G 11 | 85°F | 85°F | 1016 hPa | ||
| 41056 | 8 mi | 63 min | E 12 G 14 | 84°F | 85°F | 2 ft | 1015.5 hPa (-0.7) | |
| CLBP4 - 9752235 - Culebra, PR | 12 mi | 51 min | 83°F | 86°F | 1015.9 hPa | |||
| YABP4 - 9754228 - Yabucoa Harbor, PR | 22 mi | 45 min | 85°F | 76°F | ||||
| CHAV3 - 9751639 - Charlotte Amalie, VI | 30 mi | 51 min | 82°F | 1015.8 hPa | ||||
| 41052 - South of St. John, Virgin Islands | 36 mi | 63 min | E 14 G 18 | 85°F | 85°F | 3 ft | 1014.5 hPa (-0.5) | |
| LAMV3 | 39 mi | 45 min | 83°F | 85°F | ||||
| 41053 - San Juan, PR | 42 mi | 63 min | ESE 5.8 G 9.7 | 83°F | 84°F | 3 ft | 1015 hPa (-0.5) | |
| SJNP4 - 9755371 - San Juan, PR | 42 mi | 45 min | ESE 5.1 G 6 | 82°F | 85°F | 1016.1 hPa | ||
| JOXP4 - Jobos Bay Reserve, Puerto Rico | 44 mi | 78 min | E 1.9 | 81°F | 1017 hPa | 74°F | ||
| CHSV3 - 9751364 - Christiansted Harbor, Virgin Islands | 48 mi | 51 min | E 2.9 G 7 | 82°F | 86°F | 1015.4 hPa | ||
| LTBV3 - 9751401 - Lime Tree Bay, VI | 48 mi | 45 min | ESE 6 G 13 | 83°F | 87°F | 1016 hPa |
Wind History for Isabel Segunda, Vieques Island, PR
(wind in knots) EDIT (on/off) Help| Last 24hr | ||||||||||||||||||||||||
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| 2 days ago |
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports. Follow links for more data.| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
Link to 5 minute data for TJSJ
Wind History from JSJ (wind in knots)
| 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 | |
| Last 24hr | SE | SE | E | E | E | E | E | E G19 | E | E | E | E | E | E | E | E | E | E | E | SE | ||||
| 1 day ago | S | S | Calm | Calm | SE | SE | E | E | E | E | NE | E | E | NE G23 | E G22 | E | E | E | E | E | ||||
| 2 days ago | E | SE | E | E | SE | SE | E | E | E | E | E | E G24 | E | E G22 | E G24 | E | E | E | E | E | E |
Tide / Current Tables for Punta Mulas, Isla de Vieques, Puerto Rico
EDIT Weekend mode (on/off) (on/off) Help One Week of DataPunta Mulas
Click for Map
Mon -- 01:56 AM AST Moonrise
Mon -- 03:40 AM AST 0.77 feet High Tide
Mon -- 06:06 AM AST Sunrise
Mon -- 10:11 AM AST -0.00 feet Low Tide
Mon -- 03:29 PM AST Moonset
Mon -- 05:44 PM AST 1.35 feet High Tide
Mon -- 06:40 PM AST Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Mon -- 01:56 AM AST Moonrise
Mon -- 03:40 AM AST 0.77 feet High Tide
Mon -- 06:06 AM AST Sunrise
Mon -- 10:11 AM AST -0.00 feet Low Tide
Mon -- 03:29 PM AST Moonset
Mon -- 05:44 PM AST 1.35 feet High Tide
Mon -- 06:40 PM AST Sunset
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 | 0.6 | 0.7 | 0.8 | 0.8 | 0.7 | 0.6 | 0.4 | 0.2 | 0.1 | 0 | 0 | 0.2 | 0.4 | 0.7 | 1 | 1.2 | 1.3 | 1.3 | 1.3 | 1.1 | 0.9 | 0.7 | 0.6 |
Tide / Current Tables for Vieques Passage, Puerto Rico Current (2)
EDIT (on/off) Help One Week of DataVieques Passage
Click for Map
Mon -- 01:10 AM AST -0.78 knots Max Ebb
Mon -- 01:57 AM AST Moonrise
Mon -- 05:07 AM AST 0.00 knots Slack
Mon -- 06:06 AM AST Sunrise
Mon -- 07:26 AM AST 0.32 knots Max Flood
Mon -- 09:56 AM AST -0.00 knots Slack
Mon -- 12:52 PM AST -0.41 knots Max Ebb
Mon -- 03:28 PM AST 0.00 knots Slack
Mon -- 03:30 PM AST Moonset
Mon -- 06:41 PM AST Sunset
Mon -- 07:12 PM AST 0.77 knots Max Flood
Mon -- 10:34 PM AST -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Mon -- 01:10 AM AST -0.78 knots Max Ebb
Mon -- 01:57 AM AST Moonrise
Mon -- 05:07 AM AST 0.00 knots Slack
Mon -- 06:06 AM AST Sunrise
Mon -- 07:26 AM AST 0.32 knots Max Flood
Mon -- 09:56 AM AST -0.00 knots Slack
Mon -- 12:52 PM AST -0.41 knots Max Ebb
Mon -- 03:28 PM AST 0.00 knots Slack
Mon -- 03:30 PM AST Moonset
Mon -- 06:41 PM AST Sunset
Mon -- 07:12 PM AST 0.77 knots Max Flood
Mon -- 10:34 PM AST -0.00 knots Slack
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 | -0.8 | -0.7 | -0.6 | -0.3 | -0 | 0.2 | 0.3 | 0.3 | 0.2 | -0 | -0.2 | -0.4 | -0.4 | -0.3 | -0.1 | 0.1 | 0.4 | 0.7 | 0.8 | 0.7 | 0.5 | 0.2 | -0.2 |
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 (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. |