Wednesday, December11, 2019
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Marine Weather and Tides
Guayama, 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 6:44AMSunset 5:51PM Wednesday December 11, 2019 4:41 PM AST (20:41 UTC) Moonrise 5:35PMMoonset 6:03AM Illumination 100% Phase: Full Moon; Moon at 15 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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AMZ735 Coastal Waters Of Southern Puerto Rico Out 10 Nm- 946 Am Ast Wed Dec 11 2019
.small craft should exercise caution...
Rest of today..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 7 seconds. Scattered showers through the day. Isolated Thunderstorms in the afternoon.
Tonight..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 7 seconds. Isolated showers through the night.
Thursday..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 7 seconds. Scattered showers.
Thursday night..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 7 seconds. Scattered showers.
Friday..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 7 seconds. Scattered showers.
Saturday..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 7 seconds. Isolated showers.
Sunday..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 946 Am Ast Wed Dec 11 2019
Synopsis for puerto rico and the uS. Virgin islands waters... Moderate to fresh easterly winds continue across the local waters, with the stronger than normal trade winds induced by a strong high pressure ridge anchored over the north central atlantic. These winds will create choppy and hazardous seas which will persist through the remainder of the week. Isolated to scattered trade wind showers can also be expected across much of the regional waters for the next several days.


7 Day Forecast for Marine Location Near Guayama, PR
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location: 17.93, -66.1     debug


Area Discussion for - San Juan, PR
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FXCA62 TJSJ 111740 AFDSJU

Area Forecast Discussion National Weather Service San Juan PR 140 PM AST Wed Dec 11 2019

SYNOPSIS. Showery conditions will continue to prevail across the forecast area through at least the end of the week under trofiness and enough low level moisture. As the trough aloft weakens, a mid level ridge pattern is then expected to establish across the local islands.

SHORT TERM. Tonight through Friday .

Variably cloudy skies prevailed across the local islands throughout the day with passing showers noted over north and east Puerto Rico as well as the US Virgin Islands. Winds were from the east northeast at 15-20 knots with coastal temperatures in the mid 80s at the lower elevations. Rainfall totals associated with these passing showers, however, were minimal.

The short term forecast remains on track. Continue to expect showery conditions with frequent passing showers mainly across north and east Puerto Rico as well as the US Virgin islands through at least Friday. These wet conditions are the result of trofiness at mid and upper levels as well as precipitable water values near 1.60-1.70 inches. Although wet conditions are expected, rainfall totals will range between 1 and 3 inches over northeast Puerto Rico. Isolated thunderstorms cant be ruled out as well.

LONG TERM. Sat thru Thu . /issued 543 AM AST Wed Dec 11 2019/

A fairly wet weather pattern continues into the weekend as moisture gets pulled up from the southeast into our region. For the weekend, Sunday looks to be the wetter of the two days. Under the direction of the forecasted wind flow, southern and eastern Puerto Rico will see the bulk of the shower activity, with a second maximum in rainfall for northwestern Puerto Rico in the afternoon under the convergent windflow around the island. The atmosphere looks to be more stable for the weekend compared to the short term period, so the thunderstorm threat will be minimal. Low level winds are expected to slow down a little bit, but still have decent speed to keep showers moving along. Thus the threat for local flooding should be rather low.

As has been discussed over the past few days, a strong area of high pressure in the Atlantic has been driving stronger than normal easterly trade winds across the region. These winds are expected to subside a bit as this high moves off to the east over the weekend. However, another area of high pressure will move out over the Atlantic for Monday, and this will once again enhance the low level wind flow. This will impact marine conditions once again, and will keep fairly breezy winds in the forecast. Along with that area of high pressure, drier and more stable air is expected to move in for next week. Long range models are even hinting at some Saharan dust that could work in for the middle of next week. Shower activity is of course possible, but these showers will be less prevalent than what we have seen over the past few days.

AVIATION. VFR conds are expected through the forecast period. However, passing SHRA may produce brief MVFR conds at TIST, TISX and TJSJ at times, but VFR conds should prevail most of the time. Some mountain obscuration are also possible in the interior portions of Puerto Rico and near El Yunque. ENE winds of 15-25 kts below FL100. Wind gusts of 30 kts are possible with SHRA as they pass by.

MARINE. Hazardous marine conditions will continue to prevail across the local waters during the next several days with wind- waves between 6 and 8 feet. Dangerous rip currents are expected as well across the north facing beaches of Puerto Rico, Culebra, Saint Croix and the northwest tip of Saint Thomas.

PRELIMINARY POINT TEMPS/POPS. SJU 76 84 74 84 / 70 70 80 60 STT 76 85 74 85 / 70 70 70 40

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

High Rip Current Risk through late Thursday night for Mayaguez and Vicinity.

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

AM . Small Craft Advisory until 8 AM AST Saturday 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 . OM AVIATION . EM PUBLIC DESK . ERG


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
JOXP4 - Jobos Bay Reserve, Puerto Rico 7 mi56 min NE 6 87°F 1016 hPa67°F
YABP4 - 9754228 - Yabucoa Harbor, PR 17 mi53 min 82°F 72°F
42085 - Southeast of Ponce, PR 23 mi41 min ENE 14 G 18 84°F 83°F4 ft1013.2 hPa (-1.4)
ESPP4 - 9752695 - Esperanza, PR 35 mi53 min ENE 4.1 G 9.9 83°F 82°F1015.1 hPa
SJNP4 - 9755371 - San Juan, PR 37 mi53 min E 16 G 20 80°F 84°F1015.4 hPa
41053 - San Juan, PR 38 mi41 min E 16 G 19 80°F 84°F6 ft1014.4 hPa (-1.8)
41056 41 mi41 min ENE 12 G 18 80°F 83°F5 ft1014.1 hPa (-1.3)
CLBP4 - 9752235 - Culebra, PR 49 mi53 min 82°F 84°F1015.1 hPa

Wind History for Yabucoa Harbor, PR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure

Link to 5 minute data for TJPS

Wind History from JPS (wind in knots)
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Tide / Current Tables for Arroyo, Puerto Rico
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Arroyo
Click for Map
Wed -- 06:02 AM AST     Moonset
Wed -- 06:45 AM AST     Sunrise
Wed -- 11:34 AM AST     0.67 feet Low Tide
Wed -- 11:36 AM AST     0.80 feet High Tide
Wed -- 05:34 PM AST     Moonrise
Wed -- 05:49 PM AST     Sunset
Wed -- 07:22 PM AST     0.70 feet High Tide
Wed -- 11:21 PM AST     -0.26 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.1-00.20.30.50.70.80.80.80.70.70.70.80.80.70.70.70.70.70.70.70.50.1-0.2

Tide / Current Tables for Punta Tuna, Puerto Rico
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Punta Tuna
Click for Map
Wed -- 06:02 AM AST     Moonset
Wed -- 06:44 AM AST     Sunrise
Wed -- 09:58 AM AST     0.91 feet High Tide
Wed -- 05:33 PM AST     Moonrise
Wed -- 05:48 PM AST     Sunset
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    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 (15,3,4,5)
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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 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.