Sunday, December8, 2019
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Marine Weather and Tides
Luis M. Cintr�n, PR

Version 3.4
NOTICE
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
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 6:41AMSunset 5:47PM Sunday December 8, 2019 8:36 AM AST (12:36 UTC) Moonrise 3:23PMMoonset 3:23AM Illumination 88% Phase: Waxing Gibbous; Moon at 11 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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AMZ725 Coastal Waters Of Southern Usvi Vieques And Eastern Puerto Rico Out 10 Nm- 401 Am Ast Sun Dec 8 2019
Today..East winds 5 to 10 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Isolated showers.
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.
Monday..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 8 seconds. Scattered showers in the morning. Isolated Thunderstorms through the day.
Monday night..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 7 seconds. Scattered showers.
Tuesday..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 7 seconds. Isolated showers.
Wednesday..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 10 seconds. Northeast swell around 4 feet. Scattered showers.
Thursday..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 11 seconds. Northeast swell 4 to 6 feet. Scattered showers.
AMZ700 401 Am Ast Sun Dec 8 2019
Synopsis for puerto rico and the uS. Virgin islands waters... Moderate easterly winds will continue across the local waters, resulting in choppy seas today. Higher seas are expected beginning late tonight and into Monday due to stronger than normal trade winds from a strong atlantic high pressure. Hazardous marine conditions are forecast for portions of the local waters starting Monday night and lasting all the way into the next weekend. Isolated to scattered showers can be expected across the region for the next few days.


7 Day Forecast for Marine Location Near Luis M. Cintrn, PR
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location: 18.32, -65.64     debug


Area Discussion for - San Juan, PR
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FXCA62 TJSJ 080903 AFDSJU

Area Forecast Discussion National Weather Service San Juan PR 503 AM AST Sun Dec 8 2019

SYNOPSIS.

Isolated to scattered showers are possible for the next few days across the region, though conditions will generally be drier. In fact, no frontal passages or tropical waves are expected for the foreseeable future. However, stronger than average trade winds will be with us for most of this week, so breezy winds are expected. These winds will drive hazardous seas heading into the next workweek, and a Small Craft Advisory is likely at some point.

SHORT TERM. Today through Tuesday .

An approaching upper level trough will usher in a westerly jet up to 55 knots Monday through early Tuesday morning. At mid levels, a cold pool accompanying the upper level trough will approach the area and pass to our northeast, but not without bringing 500 mb temperatures of minus 8 degrees to the area on Tuesday. This will also be the time when the driest mid level air will be encountered. At the surface, high pressure over New York early Sunday morning will move into the western Atlantic tonight and strengthen to as much as 1043 mb in the central Atlantic near 40 north by Monday evening. This will increase the local pressure gradient and also the east northeast winds in the lower levels. Surface winds over the local waters will increase to around 20 knots. Bands of moisture are interspersed in this flow over the western tropical Atlantic with areas of drier air between. One of those drier areas is moving over Puerto Rico this morning and will reduce the shower activity from levels seen yesterday. Other bands of moisture will bring windward showers during the overnight and early morning periods, and some activity in southwest and western Puerto Rico during the mid afternoons. Weak mid level moisture along with rapidly moving showers will considerably limit amounts of rain received during the period.

LONG TERM. Wednesday through Monday

The long term forecast continues to look fairly uneventful for the foreseeable future, as no major tropical waves or fronts are forecasted. The threat for urban and small stream flooding will still exist, though that threat is expected to be minor. We will see a minor increase in low to mid-level moisture content for Wednesday. This moisture increase will not be associated with any organized system, but simply patches of moisture riding in with the easterly trade winds. Fairly vigorous easterly trade winds at around 20 knots from 850 to 700 mb will help to keep these showers moving along, and keeping rain amounts to a minimum. However, persistent showers over a given area could drive some localized flooding.

Similar conditions are expected to prevail for Thursday and Friday as well. The steering flow stays above average, and precipitable water values stay around average. Upper level atmospheric conditions will be rather unfavorable for thunderstorm development for the middle to end of the week as well. Slightly drier conditions are forecasted for next weekend, though uncertainty is high in that regard. However, even very long range models expect uneventful weather for the beginning of next week as well.

AVIATION.

VFR conditions are expected to prevail across all terminals. Sct SHRA will develop in SW PR aft 08/17Z with highest trrn obscured. Brief MVFR may be seen in TJMZ. Sfc winds ENE 5-15 kt with sea breeze influences. Max winds W-WNW 40 kt at FL410 increasing to 55 knots at FL540.

MARINE.

The easterly trade winds are expected to increase over the next few days as a strong area of high pressure is forecasted to develop over the central Atlantic, thus enhancing pressure gradients. With winds of at least 15-20 knots beginning Monday, seas will become choppy and hazardous, with small craft advisory conditions likely. Though the buoy just offshore of San Juan is showing seas around 3-4 feet, buoy 41043 in the outer Atlantic waters is showing wave heights of around 6 to 7 feet and is definitely higher than model forecasts. At this point, a Small Craft Advisory is not expected till Monday night, but the situation will be monitored closely in case the advisory needs to come out sooner.

PRELIMINARY POINT TEMPS/POPS. SJU 86 75 84 74 / 40 40 40 40 STT 86 75 86 74 / 30 50 50 40

SJU WATCHES/WARNINGS/ADVISORIES. PR . None. VI . None. AM . None.

SHORT TERM . WS LONG TERM . mb


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
41056 10 mi97 min E 7.8 G 12 81°F 83°F3 ft1014.3 hPa (+1.0)
CLBP4 - 9752235 - Culebra, PR 18 mi55 min 79°F 84°F1015.9 hPa
ESPP4 - 9752695 - Esperanza, PR 18 mi49 min NE 1 G 2.9 82°F 82°F1016.2 hPa
YABP4 - 9754228 - Yabucoa Harbor, PR 21 mi49 min 75°F 71°F
41053 - San Juan, PR 27 mi97 min S 5.8 G 5.8 78°F 84°F4 ft1014.6 hPa (+0.9)
SJNP4 - 9755371 - San Juan, PR 27 mi49 min SE 1.9 G 2.9 79°F 84°F1016.2 hPa
CHAV3 - 9751639 - Charlotte Amalie, VI 38 mi55 min 80°F 1015.8 hPa
JOXP4 - Jobos Bay Reserve, Puerto Rico 40 mi52 min Calm 76°F 1017 hPa69°F
41052 - South of St. John, Virgin Islands 47 mi97 min E 12 G 14 82°F 83°F3 ft1014 hPa (+0.7)
LAMV3 49 mi49 min 82°F 83°F

Wind History for Fajardo, PR
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Airport Reports
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Tide / Current Tables for Playa de Fajardo, Puerto Rico
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Playa de Fajardo
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Sun -- 03:22 AM AST     Moonset
Sun -- 06:20 AM AST     1.44 feet High Tide
Sun -- 06:42 AM AST     Sunrise
Sun -- 12:26 PM AST     0.59 feet Low Tide
Sun -- 03:22 PM AST     Moonrise
Sun -- 05:33 PM AST     1.08 feet High Tide
Sun -- 05:46 PM AST     Sunset
Sun -- 11:56 PM AST     0.06 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.20.30.60.81.11.31.41.41.31.10.90.70.60.60.70.811.11.110.80.50.30.1

Tide / Current Tables for Vieques Passage, Puerto Rico Current
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Vieques Passage
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Sun -- 01:32 AM AST     -0.46 knots Max Ebb
Sun -- 03:22 AM AST     Moonset
Sun -- 04:23 AM AST     0.00 knots Slack
Sun -- 06:41 AM AST     Sunrise
Sun -- 07:58 AM AST     0.70 knots Max Flood
Sun -- 11:20 AM AST     -0.00 knots Slack
Sun -- 02:44 PM AST     -0.71 knots Max Ebb
Sun -- 03:23 PM AST     Moonrise
Sun -- 05:46 PM AST     Sunset
Sun -- 06:33 PM AST     0.00 knots Slack
Sun -- 08:52 PM AST     0.30 knots Max Flood
Sun -- 11:19 PM AST     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.3-0.4-0.4-0.3-0.10.20.40.60.70.60.40.1-0.2-0.5-0.7-0.7-0.6-0.4-0.10.10.30.30.20.1

Weather Map
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wmap_A
GEOS 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 (7,2,3,4)
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Ground Weather Radar Station Puerto Rico,Virgin Islands
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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.