Friday, December13, 2019
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Marine Weather and Tides
Carolina, 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 6:45AMSunset 5:50PM Friday December 13, 2019 9:39 PM AST (01:39 UTC) Moonrise 7:22PMMoonset 8:00AM Illumination 95% Phase: Waning Gibbous; Moon at 17 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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AMZ712 Coastal Waters Of Northern Puerto Rico Out 10 Nm- 901 Pm Ast Fri Dec 13 2019
.small craft advisory in effect through late Sunday night...
Rest of tonight..East winds 15 to 20 knots. Seas 5 to 7 feet with occasional seas up to 9 feet. Dominant period 10 seconds. Northeast swell around 4 feet. Scattered showers.
Saturday..East winds 15 to 20 knots. Seas 5 to 7 feet with occasional seas up to 9 feet. Dominant period 10 seconds. Northeast swell around 4 feet. Isolated showers.
Saturday night..East winds 15 to 20 knots. Seas 5 to 7 feet with occasional seas up to 9 feet. Dominant period 10 seconds. Northeast swell around 4 feet. Isolated showers through the night.
Sunday..East winds 15 to 20 knots. Seas 5 to 7 feet with occasional seas up to 9 feet. Dominant period 10 seconds. Scattered showers.
Sunday night..East winds 15 to 20 knots. Seas 5 to 7 feet with occasional seas up to 9 feet. Dominant period 10 seconds. Isolated showers.
Monday..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 8 seconds. Isolated showers.
Tuesday..East winds 15 to 20 knots. Seas 5 to 7 feet with occasional seas up to 9 feet. Dominant period 8 seconds. Scattered showers.
Wednesday..Southeast winds 10 to 15 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 9 seconds. Scattered showers.
AMZ700 901 Pm Ast Fri Dec 13 2019
Synopsis for puerto rico and the uS. Virgin islands waters... Moderate to fresh easterly winds will continue across the local waters, due to a strong ridge of high pressure anchored over the north central atlantic. These brisk trade winds will persist through the weekend and continue to cause hazardous seas over much of the local waters. Also, isolated to scattered trade wind showers with gusty winds are expected through Sunday.


7 Day Forecast for Marine Location Near Carolina, PR
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location: 18.46, -65.99     debug


Area Discussion for - San Juan, PR
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FXCA62 TJSJ 140113 AFDSJU

Area Forecast Discussion National Weather Service San Juan PR 913 PM AST Fri Dec 13 2019

UPDATE. Partly cloudy to variable cloudy skies continued as occasional patches of low to mid level clouds moved across the islands and coastal waters accompanied by brief passing showers. Some showers continued to produce periods of moderate to locally heavy rains with gusty winds in excess of 25 mph as they quickly passed by. Expect periods of showers to continue across the area during the rest of the overnight hours while affecting parts of the coastal waters as well as the north and east to southeast sections of the islands from time to time. Surface winds are still expected to become more east southeast overnight, then southeast by Saturday afternoon with a gradual diminishing of trade wind moisture transport. The prevailing winds are also expected to slightly decrease in intensity over the area during the weekend as the Atlantic high lift slightly northward. No significant changes made to the inherited short term forecast package and reasoning at this time.

AVIATION UPDATE. No chg to previous AVN fcst discussion. VFR at all terminals durg prd. Wdly sct SHRA en route btw islands and ovr regional waters SCT-BKN lyrs nr FL025. FL050 . FL080. Few tops nr FL180 w/SHRA. Wnd fm E 20-25 kts BLO FL200. Sfc wnd fm E-SE 5-15kt with ocnl hir gust btw 25-30 kts w/passing SHRA.

MARINE UPDATE. No change to previous marine discussion. SCA continue due to choppy wind driven seas for most of the regional waters except protected waters of west and southern PR. Recent data from surrounding buoys suggests seas between 5-6 feet over the near shore waters and between 7-9 feet over the offshore Atlantic and Caribbean waters and all local passages.

PREV DISCUSSION. /issued 152 PM AST Fri Dec 13 2019/

SYNOPSIS . Surface high pressure in the Atlantic continues to promote breezy conditions and will continue to do so into the weekend. The upper trough is moving east and an upper ridge will be over the local area this weekend. Seas will remain hazardous through the weekend. Shower activity is expected across the local area with moderate to locally heavy rain and gusty.

SHORT TERM . This afternoon through Sunday .

The shower activity has been moderate to strong today and the winds have been gusty. For the rest of the afternoon, we can expect scattered shower activity with gusty winds. The shower activity is expected to become more isolated overnight, but the showers will have gusty winds as well.

The available moisture will remain rather constant for the next few days and will contribute to the development of showers across the local area. Isolated to scattered shower activity is forecast, however, the showers will likely come with strong gusty winds. This is because the shower activity is moving quickly as the prevailing wind flow from the east is at about 15 to 20 mph.

LONG TERM . Monday through Saturday .

From previous discussion .

A surface ridge stretched across the central Atlantic will continue to be the dominant feature on Monday. As it weakens and pulls away to the northeast, a ridge stretching from James Bay in Canada to the southeastern United States will build into the Atlantic - a process that is expected to repeat near the end of the week next week. Because of this, a zonal ridge is expected to be the major feature to our north through the forecast period. This will aid in the persistence of moderate, generally easterly trade winds, which are forecast to weaken somewhat later in the week as the ridge weakens its hold over the Atlantic somewhat. At the mid-levels, a ridge is expected to dominate over the area through the week next week; a trough to our north will weaken this ridge slightly later in the week. Aloft, the TUTT will be located to the east of the local islands on Monday. These conditions will likely act to inhibit upward motion over the area. Even so, passing showers are still expected, as well as afternoon showers due to local effects and diurnal heating, especially in western Puerto Rico.

A weak disturbance is forecast to push westward into the area on Tuesday, associated with deep, enhanced moisture. An upper level trough will make its way eastward at the same time, stretching over Hispaniola by Tuesday afternoon. Because of this, increased shower activity is likely. As the upper level trough passes over and past us on Wednesday, a dry slot is expected to push over the area. Though the typical pattern of passing showers during the overnight and morning hours, and afternoon showers due to local effects and diurnal heating will still persist over the area, activity will be lessened. As we move into the latter half of the week, patches of moisture will push into the area, carried in on the trade winds. Associated with this moisture is the potential for increased shower activity over the area.

AVIATION . Mainly VFR conditions are expected. Trade wind showers will continue to affect the local area through the forecast period. These showers are bringing strong winds, out of the east at 15 to 25 mph, with stronger gusts at times. Brief MVFR conditions are possible with this activity.

MARINE . Small craft advisories continue in effect for most of the local waters, and the advisories are in effect until late Sunday or early Monday. The latest buoy observations indicate seas of 6-7 feet and winds near or just over 22 knots. These conditions could improve slightly overnight but winds and seas will increase quickly during the day.

PRELIMINARY POINT TEMPS/POPS. SJU 73 87 76 86 / 40 10 40 40 STT 76 85 76 86 / 20 30 40 40

SJU WATCHES/WARNINGS/ADVISORIES. PR . High Rip Current Risk through late Sunday night for Culebra- North Central-Northeast-Northwest-San Juan and Vicinity- Southeast.

VI . High Rip Current Risk through late Sunday night for St Croix.

AM . Small Craft Advisory until 6 AM AST Monday 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 Northwestern Puerto Rico out 10 NM-Coastal Waters of Northern Puerto Rico out 10 NM-Coastal Waters of Northern USVI and Culebra out 10 NM-Coastal Waters of Southern USVI Vieques and Eastern Puerto Rico out 10 NM-Mona Passage Southward to 17N.



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


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
41053 - San Juan, PR 6 mi40 min SE 14 G 18 78°F 84°F7 ft1013.4 hPa (+1.6)
SJNP4 - 9755371 - San Juan, PR 7 mi52 min E 11 G 16 78°F 82°F1014.5 hPa
YABP4 - 9754228 - Yabucoa Harbor, PR 29 mi52 min 77°F 73°F
41056 31 mi40 min E 23 G 31 78°F 82°F5 ft1013.2 hPa (+1.4)
ESPP4 - 9752695 - Esperanza, PR 37 mi52 min ESE 11 G 16 80°F 81°F1014.3 hPa
JOXP4 - Jobos Bay Reserve, Puerto Rico 37 mi55 min ENE 2.9 76°F 1015 hPa72°F
AROP4 - 9757809 - Arecibo, PR 38 mi52 min Calm G 0
CLBP4 - 9752235 - Culebra, PR 38 mi58 min 76°F 83°F1014.4 hPa

Wind History for San Juan, PR
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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Tide / Current Tables for Boca De Cangrejos, Isla Verde, San Juan, Puerto Rico
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Boca De Cangrejos
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Fri -- 03:11 AM AST     -0.19 feet Low Tide
Fri -- 06:46 AM AST     Sunrise
Fri -- 07:59 AM AST     Moonset
Fri -- 10:40 AM AST     1.66 feet High Tide
Fri -- 05:25 PM AST     0.45 feet Low Tide
Fri -- 05:49 PM AST     Sunset
Fri -- 07:21 PM AST     Moonrise
Fri -- 09:38 PM AST     0.76 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.30.1-0.1-0.2-0.10.10.40.71.11.41.61.71.51.310.80.60.50.50.50.70.70.80.7

Tide / Current Tables for San Juan, La Puntilla, San Juan Bay, Puerto Rico
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


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 (20,4,5,8)
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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.