Sunday, March29, 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 6:17AMSunset 6:36PM Sunday March 29, 2020 1:26 AM AST (05:26 UTC) Moonrise 9:46AMMoonset 11:06PM Illumination 26% Phase: Waxing Crescent; Moon at 5 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- 944 Pm Ast Sat Mar 28 2020
.small craft should exercise caution...
Rest of tonight..Northeast winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 11 seconds. Northeast swell around 4 feet. Isolated showers through the night.
Sunday..East 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. Isolated showers through the day.
Sunday night..Northeast winds 15 to 20 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. East swell around 4 feet in the evening.
Monday..Northeast winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Isolated showers.
Monday night..Northeast winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Isolated showers.
Tuesday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Isolated showers.
Wednesday..Southeast winds 5 to 10 knots. Seas 1 to 3 feet. Dominant period 11 seconds. Isolated showers.
Thursday..Southeast winds 5 to 10 knots. Seas 1 to 3 feet. Dominant period 10 seconds. Isolated showers.
AMZ700 944 Pm Ast Sat Mar 28 2020
Synopsis for puerto rico and the uS. Virgin islands waters... A northerly swell and moderate to fresh winds will result in choppy seas mainly across the atlantic waters and caribbean passages the rest of the weekend. Shower activity as well as the winds and seas will gradually diminish early next week.


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 290157 AFDSJU

Area Forecast Discussion National Weather Service San Juan PR 957 PM AST Sat Mar 28 2020

UPDATE.

The available moisture and local effects result in shower activity downwind from the U.S. Virgin Islands into the surrounding waters and the eastern sections of Puerto Rico. More activity developed across the interior and western sections of PR through the afternoon hours. This activity left between one and two inches of rain across portions of PR, while the Virgin Islands observed less than half an inch. The northeasterly winds will push patches of moisture with clouds and isolated showers over the islands overnight. Therefore, passing showers should not be ruled out over the windward sections. However, a drying trend is expected to begin tomorrow Sunday afternoon and through the first part of next week. Low temperatures will be in the low to mid 70s along coastal areas and in the low 60s across mountain locations.

AVIATION.

VFR conditions expected to prevail across the local terminals. Winds will continue from the northeast at 10 kt or less, returning from the NE at 15-20 knots after 29/13z and gusty. Afternoon convection is expected between 29/17-23z mainly over the interior and western sections of PR and downwind from the USVI.

MARINE.

Across the regional waters, small craft operators are urge to exercise caution across the Atlantic waters and Caribbean Passages as a northerly swell and locally induce seas are creating wave heights between 4 and 6 feet. Seas will increase between 5 and 7 feet across the Atlantic Offshore waters between 2 am Sunday into Sunday evening. Therefore, a small craft advisory is in effects.

PREV DISCUSSION. /issued 445 PM AST Sat Mar 28 2020/

SYNOPSIS .

Lingering low-level moisture will continue to promote a showery evening across the northern half of Puerto Rico. Patches of moisture will continue to enter the region, but drier air will filter in to limit shower activity by Monday. Less available moisture at the surface and a high pressure system will promote fairly stable conditions through most of the workweek. Choppy marine conditions due to a northerly swell and increasing winds will continue for the rest of the weekend.

SHORT TERM . Rest of today through Monday .

Lingering activity from the afternoon showers could persist into the early evening hours across western Puerto Rico. However, due to the lack of dynamic at the lower or upper levels, this activity is expected to be limited. On the other hand, as a surface high pressure over the western Atlantic maintains a moderate to relatively strong northeast wind flow, expect an advective pattern of passing showers over portions of northern and eastern PR and USVI. By Sunday, moisture will gradually decrease across the area, but precipitable water values will remain near 1.3 to 1.4 inches. Therefore, once again, expect night and early morning showers over eastern/northern PR & USVI, followed by afternoon convection due to local effects. At the upper levels, a trough will remain near the area, but the area of better divergence is expected to remain east of the islands, and it should not support the afternoon activity. A similar weather pattern is anticipated for Monday, but with less available moisture at the surface, which should result in limited shower activity for the islands. Regardless, the potential for ponding of water on roadways and small minor urban flooding remains for the interior and southwestern Puerto Rico through the short- term forecast period.

LONG TERM . Tuesday through Sunday . From Prev. Discussion

A high pressure at 700mb located north of Hispanola on Tuesday morning will produce a very stable environment over Puerto Rico and the U.S. Virgin Islands. With the subsidence side of the high pressure over the local islands, precipitable water values are forecast to drop near an inch. Further drying is expected on Wednesday when the inversion cap strengthen. By that time, moisture levels are forecast to reach two standard below normal. Therefore, shower activity between Tuesday and Thursday will be minimal . with only isolated showers, if any, developing over western Puerto Rico during the afternoon hours. Surface winds will shift to the southeast by midweek in response to the surface high pressure moving eastward just north of Puerto Rico. This will likely bring warmer than normal temperatures across the local islands the second part of the week. Also on Friday, the probability of precipitation remains low as moisture and stability remains unfavorable for organized shower activity. It is not until the weekend, when the surface high pressure relocates east northeast of the Lesser Antilles that moisture increases somewhat across the local islands. Then, scattered showers could be a possibility at times.

AVIATION .

Mainly VFR conditions expected during the period. However, afternoon convection may bring VCSH to TJMZ and TJPS with SCT to BKN at FL020-050 through 28/23Z. VCSH also expected at northern PR, USVI and Leeward terminals between 28/23Z and 29/14Z. This may result in brief MVFR conditions. Surface winds from E-NE at 10-20 knots with sea breeze variations, decreasing 10-15 knots after

MARINE .

Seas at 6 feet or below and east winds up to 15 knots are expected across the local waters tonight. By late Saturday night into the overnight hours of Sunday, a northerly swell with increasing winds will invade the offshore Atlantic waters generating choppy to hazardous seas. Therefore, a small craft advisory will go into effect at 2 AM AST Sunday. There is a high risk of rip currents across beaches along northwestern to northeastern PR, including Culebra and eastern beaches of St. Croix.

PRELIMINARY POINT TEMPS/POPS. SJU 74 85 74 84 / 10 10 30 30 STT 75 85 74 84 / 20 10 20 20

SJU WATCHES/WARNINGS/ADVISORIES. PR . High Rip Current Risk through Sunday afternoon for Culebra- Northeast-Southeast.

High Rip Current Risk through late Sunday night for North Central-Northwest-San Juan and Vicinity.

High Rip Current Risk from 6 AM AST Sunday through late Sunday night for Mayaguez and Vicinity.

VI . High Rip Current Risk until 6 AM AST Sunday for St Croix.

AM . Small Craft Advisory from 2 AM to 8 PM AST Sunday for Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N.



SHORT TERM . CAM LONG TERM . FRG


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
41056 10 mi86 min ENE 12 G 14 79°F 80°F3 ft1016.6 hPa (+0.4)
CLBP4 - 9752235 - Culebra, PR 18 mi56 min 81°F1017.1 hPa
ESPP4 - 9752695 - Esperanza, PR 18 mi62 min NE 4.1 G 7 78°F 81°F1017.6 hPa
41053 - San Juan, PR 27 mi86 min E 16 G 18 80°F 80°F5 ft1016.6 hPa (+0.5)
SJNP4 - 9755371 - San Juan, PR 27 mi56 min ENE 8.9 G 12 79°F 81°F1017.8 hPa
CHAV3 - 9751639 - Charlotte Amalie, VI 38 mi56 min 77°F 1017.4 hPa
JOXP4 - Jobos Bay Reserve, Puerto Rico 40 mi101 min NNE 4.1 77°F 1018 hPa69°F
LAMV3 49 mi56 min 78°F 80°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 -- 12:10 AM AST     1.36 feet High Tide
Sun -- 06:18 AM AST     Sunrise
Sun -- 06:41 AM AST     0.36 feet Low Tide
Sun -- 09:45 AM AST     Moonrise
Sun -- 11:34 AM AST     0.76 feet High Tide
Sun -- 05:39 PM AST     -0.03 feet Low Tide
Sun -- 06:35 PM AST     Sunset
Sun -- 11:06 PM AST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.41.31.20.90.70.50.40.40.40.50.70.70.80.70.50.30.1-0-00.10.30.60.91.1

Tide / Current Tables for Vieques Passage, Puerto Rico Current
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Vieques Passage
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Sun -- 02:04 AM AST     0.67 knots Max Flood
Sun -- 05:18 AM AST     -0.00 knots Slack
Sun -- 06:18 AM AST     Sunrise
Sun -- 08:46 AM AST     -0.75 knots Max Ebb
Sun -- 09:45 AM AST     Moonrise
Sun -- 12:32 PM AST     0.00 knots Slack
Sun -- 03:01 PM AST     0.37 knots Max Flood
Sun -- 05:42 PM AST     -0.00 knots Slack
Sun -- 06:35 PM AST     Sunset
Sun -- 08:33 PM AST     -0.40 knots Max Ebb
Sun -- 11:05 PM AST     Moonset
Sun -- 11:11 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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0.40.60.70.60.40.1-0.2-0.5-0.7-0.7-0.6-0.4-0.10.10.30.40.30.1-0.1-0.3-0.4-0.4-0.3-0

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 (1,6,7,8)
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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.