Thursday, April2, 2020
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Marine Weather and Tides
Culebra, 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 6:11AMSunset 6:34PM Thursday April 2, 2020 3:05 AM AST (07:05 UTC) Moonrise 1:10PMMoonset 1:46AM Illumination 68% Phase: Waxing Gibbous; Moon at 9 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- 900 Pm Ast Wed Apr 1 2020
Rest of tonight..Southeast winds 5 to 10 knots. Seas 1 to 3 feet. Dominant period 11 seconds. Isolated showers through the night.
Thursday..Southeast winds 5 to 10 knots. Seas 1 to 3 feet. Dominant period 11 seconds. Isolated showers.
Thursday night..Southeast winds 5 to 10 knots. Seas 1 to 3 feet. Dominant period 10 seconds. Isolated showers.
Friday..South winds 5 to 10 knots. Seas 1 to 3 feet. Dominant period 11 seconds. Isolated showers.
Friday night..South winds 5 to 10 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 12 seconds. Southeast swell around 4 feet after midnight. Scattered showers.
Saturday..Northwest winds 5 to 10 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..North winds 5 to 10 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 11 seconds. North swell up to 5 feet. Scattered showers.
Monday..North winds 5 to 10 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 11 seconds. Northeast swell 4 to 5 feet. Scattered showers.
AMZ700 900 Pm Ast Wed Apr 1 2020
Synopsis for puerto rico and the uS. Virgin islands waters... Tranquil marine conditions will continue across the local waters with seas at 4 feet or below. Shower activity is not expected, and a light to gentle southeasterly wind flow will prevail tonight. Marine conditions are expected to deteriorate as a northerly swell invades the atlantic waters and local waters by Friday evening into the weekend.


7 Day Forecast for Marine Location Near Culebra, PR
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location: 18.02, -64.67     debug


Area Discussion for - San Juan, PR
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FXCA62 TJSJ 020011 AFDSJU

Area Forecast Discussion National Weather Service San Juan PR 811 PM AST Wed Apr 1 2020

UPDATE. Fair and dry weather conditions have prevailed through the afternoon and evening hours. These conditions are expected to continue during the overnight and early morning hours under mostly clear skies, as well as a light and variable surface wind flow. Significant shower activity nor accumulations are expected on Thursday, since drier air and unfavorable conditions aloft will not support widespread showers. If any, overnight and early morning showers streaming across the local waters may move over windward areas during the overnight and early morning hours. Then, diurnal heating and local effects may support the development of afternoon convection across the interior and northern sections of Puerto Rico. However, any showers that develop will be limited and short-lived. Overnight low temperatures will drop into the low to mid 70s across coastal areas, and low to mid 60s across higher elevations. Above-normal daytime high temperatures are expected on Thursday afternoon under a generally light southeasterly flow. These temperatures are expected to peak into the low 90s across coastal areas.

AVIATION. Mainly VFR conditions expected across the local terminals during the next 24 hours. SHRA may bring VCSH to TJMZ and TJBQ between 02/15-23Z. Winds will be light and variable through 02/14Z, increasing up to 10 knots and favoring a southeasterly flow with sea breeze variation thereafter.

MARINE. Fairly tranquil marine conditions with seas between 1 and 4 feet will prevail across the regional waters through at least Friday afternoon. A moderate risk of rip currents will continue for beaches along the north coast of Puerto Rico, Culebra and Saint Thomas. Marine conditions are expected to deteriorate as a northerly swell invades the Atlantic waters and local waters by Friday evening into the weekend. Therefore, Small Craft Advisories and High Risk of Rip Currents may be required.

PREV DISCUSSION. /issued 422 PM AST Wed Apr 1 2020/

SYNOPSIS . Mostly fair weather conditions continue to dominate the local weather conditions in the morning hours. A high pressure located in the north-east of the region is resulting in a southeasterly wind flow across the region. This flow generate a warmer temperatures across the region with a 91 in the San Juan airport. For Friday, a cold front will arrive and stall out over the region for the weekend.

SHORT TERM . Today through Friday .

Overall dry and fair weather conditions are expected to prevail through at least Thursday. Weakening surface high east of the Leeward Islands and an approaching front from the western Atlantic will promote a weak deep layered southerly wind flow through at least Friday afternoon. Small pulses of low level moisture will move at times across the region, aiding in the development of afternoon showers over sections of the interior and northwestern Puerto Rico each day. Across the USVI, mostly fair weather conditions should continue through the end of workweek.

Normal to above normal daytime temperatures will continue on Thursday and Friday due to the southerly wind flow. Today's max temperatures ranged from the mid 80s to low 90s across the islands. Minimum temperatures will range from the low 60s across the higher elevations to the high 70s across coastal areas.

LONG TERM . Saturday through Thursday .

/issued 504 AM AST Wed Apr 1 2020/

Low level convergence and pooling of moisture will return by Saturday and continue through the weekend as the frontal boundary and associated shearline is forecast to stall and drift southwards across the area. This along with the proximity of the upper level trough will increase the potential for shower development across the islands and coastal waters each day. Some of the shower activity may be enhanced as a subtropical jet segment is to cross the region thereby destabilizing the upper levels. Urban and small stream flooding will be possible in isolated areas over the weekend and possibly into early next week especially during the afternoon hours. Under this expected moist and unstable airmass, the best potential for convective development still looks like it will be on Saturday and Sunday. Conditions will gradually improve by Monday as the upper trough is forecast weaken, and the low level wind flow becomes more east to northeast. This is in response to a surface high pressure ridge which will build and spread across the west Atlantic.

By Tuesday and for the remainder of the period, expect some moisture fragments from the depleted shearline to return with the easterly trades. This will favor periods of passing early morning showers over the coastal waters,and isolated to scattered showers each afternoon over portions of the islands.

AVIATION . VFR conditions are expected to prevail across all terminals during the next 24 hours. Enhanced cloudiness is occurring at TJMZ/TJBQ this afternoon, and there is only a small chance for showers at these terminals. Winds primarily out of the SE across the region at 5-15 knots with sea breeze modifications.

MARINE .

Tranquil marine conditions with seas less than 4 feet across the local and regional waters. The marine conditions are expected to deteriorate for Friday and into the upcoming weekend, as a northerly swell will invade the Atlantic waters and local passages. Small Craft Advisories and precautionary statements will also be likely by then, for portions of the local waters.

PRELIMINARY POINT TEMPS/POPS. SJU 74 89 75 89 / 10 20 10 30 STT 74 83 74 83 / 10 20 10 30

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

SHORT TERM . ICP LONG TERM . 99 PUBLIC DESK . LIS


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CHSV3 - 9751364 - Christiansted Harbor, Virgin Islands 19 mi54 min Calm G 1.9 75°F 81°F1012.6 hPa
LAMV3 21 mi48 min 72°F 81°F
LTBV3 - 9751401 - Lime Tree Bay, VI 23 mi54 min SSE 4.1 G 7 78°F 82°F1014.1 hPa
CHAV3 - 9751639 - Charlotte Amalie, VI 25 mi54 min 77°F 1013.4 hPa
CLBP4 - 9752235 - Culebra, PR 39 mi54 min 77°F 82°F1013.1 hPa
ESPP4 - 9752695 - Esperanza, PR 43 mi48 min SE 8 G 9.9 81°F 81°F1013.4 hPa
41056 45 mi66 min SE 7.8 G 9.7 78°F 80°F3 ft1012.5 hPa (-1.2)

Wind History for Christiansted Harbor, St Croix, VI
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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Click EDIT to select an airport
Tide / Current Tables for Christiansted Harbor, St Croix, Virgin Islands
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Benner Bay, St. Thomas, Virgin Islands
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Benner Bay
Click for Map
Thu -- 01:47 AM AST     Moonset
Thu -- 04:58 AM AST     0.91 feet High Tide
Thu -- 06:12 AM AST     Sunrise
Thu -- 01:10 PM AST     Moonrise
Thu -- 06:33 PM AST     Sunset
Thu -- 08:51 PM AST     0.04 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40.50.70.80.90.90.90.80.70.60.50.40.30.30.30.20.20.20.10.10.100.10.1

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 (3,6,7,8)
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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.