Saturday, July11, 2020
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Marine Weather and Tides
Carolina, 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 5:53AMSunset 7:05PM Saturday July 11, 2020 11:55 PM AST (03:55 UTC) Moonrise 11:53PMMoonset 11:27AM Illumination 58% Phase: Waning Gibbous; Moon at 21 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- 927 Pm Ast Sat Jul 11 2020
Rest of tonight..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 8 seconds. Isolated Thunderstorms through the night. Scattered showers after midnight.
Sunday..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 8 seconds. Scattered showers and isolated Thunderstorms.
Sunday night..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 8 seconds. Isolated showers.
Monday..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 8 seconds. Isolated showers.
Monday night..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 8 seconds. Isolated showers.
Tuesday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 8 seconds. Scattered showers.
Wednesday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Scattered showers.
Thursday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Scattered showers.
AMZ700 927 Pm Ast Sat Jul 11 2020
Synopsis for puerto rico and the uS. Virgin islands waters... A surface high pressure will maintain moderate to fresh easterly winds across the local waters at least through Sunday. Marine and weather conditions are expected to deteriorate somewhat this evening as a tropical wave moves across the region. Showers and Thunderstorms are expected over the local waters tonight. Conditions will begin to improve on 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 120152 AAA AFDSJU

Area Forecast Discussion . UPDATED National Weather Service San Juan PR 952 PM AST Sat Jul 11 2020

UPDATE. Sounding balloon went through local dry slot ahead of tropical wave giving only 1.4 inches precipitable water. However TPW product shows 2.0-2.1 inches of precipitable water from arnd Vieques to as much as 350 miles east of San Juan. Currently lightning detection shows only sporadic activity of isolated strikes in and east of the forecast area. Satellite pictures and GFS model appears to show the axis of the wave accompanied by slightly less activity entering the Anegada Passage. Linear extrapolation suggest the axis and drier air will pass through around sunrise, followed by the second leg of the moisture in an inverted V patter that will enhance convection in western/northwestern Puerto Rico.

AVIATION. Sct SHRA ahead of rapidly advancing trop wave movg thru/arnd USVI and will reach ern PR arnd 12/03Z to result in VCSH for TNCM/TKPK/TISX/TIST/TJSJ/TJPS thru 12/09Z. SHRA redevelop ovr interior PR and wrn PR aft 12/12Z with isold TSRA and mtn obscurations. Sfc winds ESE 10-20 kt. Max winds SSW 25-32 KT btwn FL310-450.

MARINE. No changes to the marine discussion.

PREV DISCUSSION. /issued 424 PM AST Sat Jul 11 2020/

SYNOPSIS . Mostly fair weather condition are expected for the rest of the afternoon hours with some showers over western sections of Puerto Rico. Then, a tropical wave is expected to arrive the region and isolated to scattered showers and thunderstorms are expected over eastern sections of Puerto Rico and the U.S. Virgin Islands. On Monday, a more stable weather pattern is expected with mostly sunny skies. Marine conditions will continue choppy for at least Sunday Morning. Therefore a small craft advisories are in effect.

SHORT TERM . Rest of today through Monday .

Mostly fair weather conditions are expected through tonight due to a drier airmass over the region currently. As a tropical wave will approach the islands and surrounding waters starting tonight, scattered to numerous showers and a few thunderstorms are expected across the forecast area. The cloudiness, shower and thunderstorm potential will be intermittent tonight into Sunday. Rainfall accumulations are expected to cause urban and stream flooding over sections of the islands that will experience the most persistent and heaviest rains, particularly for portions of the San Juan metro and the eastern coastal municipalities late tonight into Sunday morning. Showers and thunderstorms may affect the USVI, but significant flooding is not expected, though ponding of water in poor drainage areas is expected.

For Sunday afternoon, the moisture of the tropical wave will combine with diurnal and local effects to promote showers and isolated thunderstorms over the interior and northwestern portions of Puerto Rico. It is also worth noting that showers and thunderstorms are also expected across the local waters. Showers will diminish by sunset, and only isolated to scattered showers are possible across the islands and regional waters from time to time.

By Monday, drier conditions are expected once again. Thus, limited shower activity is expected over the islands. Another round of Saharan dust will invade our area which will cause hazy skies.

LONG TERM . Tuesday through Saturday . From Prev Discussion.

Drier air with suspended Saharan dust will return next early next week and linger through Wednesday. A northeast wind flow will prevail as a broad surface high pressure holds across the central Atlantic. However, shallow moisture will move at times with the trade winds to cause passing light showers across the USVI and eastern sections of PR during the overnight and early morning hours. Followed by diurnal afternoon convection over west/southwest PR. Moisture increases during the second half of the week as a retrogressing TUTT and an induced low-level perturbation enters the eastern Caribbean and moves across the region. Therefore, shower and thunderstorm activity is expected to increase, mainly in diurnal activity over central and western PR.

AVIATION . Aviation . VFR conds expected through the daytime hours across the local terminals, except perhaps TJBQ since SHRA/TSRA is expected near TJBQ after 11/19Z. East winds at around 15KT with occasional gusts and sea breeze variations today. An approaching tropical wave will cause an increase in cloudiness and shower activity, then VCSH/VCTS can be expected overnight across the local terminals. Winds will slightly decrease tonight, but could be gusty near the showers.

MARINE . Choppy marine conditions will continue across most of the local waters due to seas up to 7 feet and winds up to 20 kts. Therefore, a small craft advisory is in effect over the Atlantic offshore waters of the region. Elsewhere, small craft operators are urged to exercise caution. A moderate risk of rip current for most of the local beaches, with a high risk of rip current over Cramer Park in Saint Croix. In the night hours today, a tropical wave is expected to reach the region causing showers and thunderstorms over the local waters. On Monday, marine conditions are expected to improve.

PRELIMINARY POINT TEMPS/POPS. SJU 78 90 79 91 / 50 50 30 30 STT 80 89 82 90 / 50 30 30 30

SJU WATCHES/WARNINGS/ADVISORIES. PR . None. VI . High Rip Current Risk through Sunday afternoon for St Croix.

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



SHORT TERM . WS LONG TERM . LIS PUBLIC DESK . LIS


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
41053 - San Juan, PR 6 mi116 min E 16 G 18 84°F 84°F1015.8 hPa (+1.5)
SJNP4 - 9755371 - San Juan, PR 7 mi56 min E 14 G 17 84°F 86°F1017.2 hPa
41056 31 mi116 min ENE 16 G 19 84°F 85°F4 ft1015.5 hPa (+1.3)
ESPP4 - 9752695 - Esperanza, PR 37 mi56 min E 5.1 G 15 84°F1017 hPa
JOXP4 - Jobos Bay Reserve, Puerto Rico 37 mi71 min NE 4.1 83°F 1018 hPa72°F
CLBP4 - 9752235 - Culebra, PR 38 mi56 min 83°F 86°F1016.2 hPa (+0.8)

Wind History for San Juan, PR
(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 Boca De Cangrejos, Isla Verde, San Juan, Puerto Rico
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Boca De Cangrejos
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Sat -- 01:41 AM AST     1.22 feet High Tide
Sat -- 05:54 AM AST     Sunrise
Sat -- 08:16 AM AST     0.28 feet Low Tide
Sat -- 11:27 AM AST     Moonset
Sat -- 02:15 PM AST     0.94 feet High Tide
Sat -- 07:04 PM AST     Sunset
Sat -- 08:01 PM AST     0.37 feet Low Tide
Sat -- 11:52 PM AST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.11.21.21.110.70.50.40.30.30.40.60.70.90.90.90.80.70.50.40.40.40.50.7

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 (23,6,7,8)
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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.