Monday, January20, 2020
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Marine Weather and Tides
Luis M. Cintr�n, PR

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
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.

Sunrise 6:56AMSunset 6:10PM Monday January 20, 2020 7:17 AM AST (11:17 UTC) Moonrise 3:05AMMoonset 2:36PM Illumination 23% Phase: Waning Crescent; Moon at 25 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- 657 Am Ast Mon Jan 20 2020
.small craft advisory in effect through Tuesday evening...
Today..East winds 15 to 20 knots. Seas 8 to 10 feet with occasional seas up to 13 feet. Dominant period 12 seconds. Northeast swell 4 to 9 feet. Scattered showers through the day.
Tonight..East winds 10 to 15 knots. Seas 6 to 8 feet with occasional seas up to 10 feet. Dominant period 12 seconds. Northeast swell 4 to 8 feet. Scattered showers.
Tuesday..Southeast winds 15 to 20 knots. Seas 5 to 7 feet with occasional seas up to 9 feet. Dominant period 11 seconds. Northeast swell 4 to 6 feet. Scattered showers.
Tuesday night..Southeast winds 10 to 15 knots. Seas 4 to 7 feet with occasional seas up to 8 feet. Dominant period 11 seconds. Northeast swell 4 to 5 feet. Scattered showers.
Wednesday..South winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Isolated showers.
Thursday..West winds 10 to 15 knots. Seas 1 to 3 feet. Dominant period 10 seconds. Scattered showers.
Friday..Northeast winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 11 seconds. Northeast swell around 4 feet. Scattered showers.
AMZ700 657 Am Ast Mon Jan 20 2020
Synopsis for puerto rico and the uS. Virgin islands waters... A northerly swell and moderate to fresh trade winds generated from high pressure in the central atlantic will continue across the regional waters and local passages over the next few days, resulting in rough and hazardous seas. The swell and winds will continue to gradually subside and decrease today and seas are expected to slowly return to below small craft advisory criteria by late Tuesday into Wednesday. Quick passing isolated to scattered showers along a lingering frontal boundary will continue across the local waters today.


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 200931 AFDSJU

Area Forecast Discussion National Weather Service San Juan PR 531 AM AST Mon Jan 20 2020

SYNOPSIS. Shallow moisture along a frontal boundary will linger across the region today while slowly decaying. This feature will continue to bring low to mid level cloud fragments and mostly stratified rains across the region today through at least early Tuesday. Passing trade wind showers will continue across the region from time to time. Surface high pressure north of the region will continue to shift eastwards farther into the central Atlantic resulting in a loosening of the local pressure gradient and slowly diminishing east to southeast trade winds. Cool early morning low temperatures can be expected with daytime high temperatures expected to be slightly above normal today and on Tuesday.

SHORT TERM. Monday through Wednesday . A stationary front positioned to the south of Puerto Rico is producing stratiform clouds and precipitation over the region; these showers will continue to move across Puerto Rico and adjacent Islands today, and produce light rainfall amounts. TJSJ Skew-T and cross-section shows moisture trapped between the 1000 to 850 mb level and the trade inversion through the short-term period. Therefore, expect occasional showers with partly cloudy skies now through Wednesday.

A Polar trough across the western Atlantic will continue to move east today through Tuesday; the trough will weaken the mid-level ridge currently over the area, and cause the surface high pressure to continue to slide northeast of Puerto Rico. Also, later today, as the Atlantic high shifts east, surface winds will become east to southeast across the area. The east to southeast winds will advect patches of drier air currently in the southern Caribbean and eastern Atlantic over Puerto Rico and adjacent Islands later today through Wednesday. The GFS shows precipitable water values falling throughout the short-term period with the highest total of 1.62 inches today and the lowest total of 1.00 inches during the morning on Wednesday. The strong inversion in the mid-level of the atmosphere and limit low-level moisture will cause relatively calm weather conditions across the region. Nevertheless, showers are possible across the eastern areas of Puerto Rico and northern coastal areas during the morning, then over most of the area during the afternoon due to local and diurnal effects. Also, the southeast wind flow should slightly increase the daytime high temperatures over Puerto Rico and adjacent Islands.

LONG TERM. Thursday through Sunday .

By Thursday, the surface ridge across the Atlantic is forecast to shift farther northeast into the central Atlantic, as a cold front will move into the western and southwest Atlantic and approach the region. An associated amplifying mid to upper- level polar trough will also cross the west Atlantic and weaken the ridge now in place overhead. This will result in a weakening of the trade wind inversion and promote instability aloft through at least early Friday. The shift in the surface to the mid- level high pressure ridge pattern should also result in better low level moisture pooling and convergence as the frontal boundary is expected to arrive and sink southwards across the region by the latter part of the work week. Model guidance also continued to suggest a vigorous mid to upper level jet max crossing the region Thursday through Friday. The combination of the instability aloft and good low level moisture convergence accompanying the frontal boundary will therefore favor the development of scattered to numerous to showers with periods of locally heavy rains across the islands and coastal waters at least through early Friday.

By late Friday and into the weekend, model guidance still suggest lingering low level moisture but gradually improving and stable conditions aloft. Therefore expect less frequent early morning shower activity across the islands and coastal waters. This will be followed by isolated to scattered showers of short duration during the afternoon hours. Improving conditions are forecast by Saturday and through Monday, as the surface high pressure will once again build and spread across the west Atlantic, resulting in a more northeasterly wind flow and a stable near normal weather pattern.

AVIATION. MVFR are conds are occurring across terminal sites TJSJ, TISX and TNCM due to SHRA/VCSH which are briefly reducing SFC VSBY. SHRA/VCSH will continue through 20/15Z for the above areas. Brief Mtn top obscr ovr E PR due to SHRA/Low CIG. VRF conds elsewhere. VCSH are possible across terminals TJBQ and TJMZ by 20/16Z with conds improving by 20/20Z. ESE winds of 15-20 kts with hir gusts up to 30kt with SHRA. Max winds WNW 50-90 kts btwn FL300-FL450.

MARINE. Mariners can expect choppy and hazardous seas through at least Tuesday night. Therefore, small craft advisories are in effect for the local waters. The combination of a northerly swell and wind- driven seas will maintain seas up to 12 feet occasionally higher through at least early Tuesday. Breaking waves between 10 and 14 feet can be expected with this swell action until later today. Refer to local Surf zone forecast (SRFSJU), Coastal waters Forecast (CWFSJU), Coastal hazard message (CFWSJU) and Marine weather message (MWWSJU) for additional information.

PRELIMINARY POINT TEMPS/POPS. SJU 84 72 88 73 / 60 30 30 30 STT 82 73 81 73 / 50 40 30 30

SJU WATCHES/WARNINGS/ADVISORIES. PR . High Rip Current Risk through Tuesday afternoon for Culebra- Mayaguez and Vicinity-North Central-Northeast-Northwest-San Juan and Vicinity-Vieques.

High Surf Advisory until 6 PM AST this evening for Culebra- Mayaguez and Vicinity-North Central-Northeast-Northwest-San Juan and Vicinity-Southeast-Vieques.

Coastal Flood Advisory until noon AST today for North Central- Northeast-Northwest-San Juan and Vicinity-Southeast.

High Rip Current Risk through this afternoon for Central Interior-Southeast.

Small Craft Advisory until 2 PM AST this afternoon for Southeast.

High Rip Current Risk through late tonight for Southwest.

Small Craft Advisory until 8 PM AST this evening for Southwest.

VI . High Rip Current Risk through Tuesday afternoon for St Croix- St Thomas. St John. and Adjacent Islands.

High Surf Advisory until 6 PM AST this evening for St Thomas. St John. and Adjacent Islands.

AM . Small Craft Advisory until 2 PM AST this afternoon for Coastal Waters of Southern Puerto Rico out 10 NM.

Small Craft Advisory until 8 PM AST Tuesday for Anegada Passage Southward to 17N-Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N-Caribbean Waters of Puerto Rico from 10 NM to 17N-Coastal Waters of Northern USVI and Culebra out 10 NM-Coastal Waters of Southern USVI Vieques and Eastern Puerto Rico out 10 NM.

Small Craft Advisory until 2 PM AST Tuesday for Coastal Waters of Northern Puerto Rico out 10 NM-Mona Passage Southward to 17N.

Small Craft Advisory until 8 PM AST this evening for Coastal Waters OF Southwestern Puerto Rico out 10 NM.

Small Craft Advisory until 8 AM AST Tuesday for Coastal Waters OF Northwestern Puerto Rico out 10 NM.



SHORT TERM . TW LONG TERM . RAM PUBLIC DESK . RAM


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
41056 10 mi78 min E 14 G 18 76°F 80°F8 ft1015.6 hPa (+0.3)
CLBP4 - 9752235 - Culebra, PR 18 mi54 min 74°F 80°F1017 hPa
ESPP4 - 9752695 - Esperanza, PR 18 mi54 min 76°F 79°F1017.2 hPa
YABP4 - 9754228 - Yabucoa Harbor, PR 21 mi48 min 75°F 72°F
41053 - San Juan, PR 27 mi78 min SE 7.8 G 14 74°F 81°F11 ft1015.5 hPa (-0.0)
SJNP4 - 9755371 - San Juan, PR 27 mi48 min 73°F 79°F1017 hPa
CHAV3 - 9751639 - Charlotte Amalie, VI 38 mi48 min 74°F 1016.6 hPa
JOXP4 - Jobos Bay Reserve, Puerto Rico 40 mi93 min NNE 4.1 73°F 1017 hPa71°F
41052 - South of St. John, Virgin Islands 47 mi78 min E 18 G 21 78°F 80°F6 ft1014.9 hPa (+0.0)
LAMV3 49 mi48 min 75°F 79°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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Mon -- 03:04 AM AST     Moonrise
Mon -- 05:42 AM AST     1.53 feet High Tide
Mon -- 06:57 AM AST     Sunrise
Mon -- 12:08 PM AST     0.41 feet Low Tide
Mon -- 02:35 PM AST     Moonset
Mon -- 04:46 PM AST     0.83 feet High Tide
Mon -- 06:09 PM AST     Sunset
Mon -- 11:13 PM AST     -0.32 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.10.20.611.31.51.51.41.20.90.70.50.40.40.60.70.80.80.70.50.30-0.2-0.3

Tide / Current Tables for Vieques Passage, Puerto Rico Current
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Vieques Passage
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Mon -- 12:34 AM AST     -0.50 knots Max Ebb
Mon -- 03:04 AM AST     Moonrise
Mon -- 03:18 AM AST     0.00 knots Slack
Mon -- 06:57 AM AST     Sunrise
Mon -- 07:01 AM AST     0.87 knots Max Flood
Mon -- 10:28 AM AST     -0.00 knots Slack
Mon -- 01:56 PM AST     -0.87 knots Max Ebb
Mon -- 02:36 PM AST     Moonset
Mon -- 05:54 PM AST     0.00 knots Slack
Mon -- 06:09 PM AST     Sunset
Mon -- 08:10 PM AST     0.34 knots Max Flood
Mon -- 10:38 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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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 (6,6,7,8)
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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 numerous 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.