Tuesday, December10, 2019
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Marine Weather and Tides
Ponce, 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 5:52PM Tuesday December 10, 2019 9:06 AM AST (13:06 UTC) Moonrise 4:49PMMoonset 5:10AM Illumination 98% Phase: Waxing Gibbous; Moon at 13 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- 445 Am Ast Tue Dec 10 2019
.small craft should exercise caution till 2 pm ast...
.small craft advisory in effect from 2 pm ast this afternoon through Wednesday evening...
Today..East winds 15 to 20 knots. Seas 4 to 7 feet with occasional seas up to 8 feet. Dominant period 7 seconds. Isolated showers.
Tonight..East winds 15 to 20 knots. Seas 5 to 7 feet with occasional seas up to 9 feet. Dominant period 7 seconds. Isolated showers.
Wednesday..East winds 15 to 20 knots. Seas 5 to 7 feet with occasional seas up to 9 feet. Dominant period 7 seconds. Scattered showers.
Wednesday night..Northeast winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 7 seconds. Isolated showers.
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.
Friday..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 7 seconds. Isolated showers.
Saturday..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 10 seconds. Isolated showers.
AMZ700 445 Am Ast Tue Dec 10 2019
Synopsis for puerto rico and the uS. Virgin islands waters... Moderate easterly winds continue across the local waters, with the stronger than normal trade winds caused by a strong ridge of high pressure over the atlantic. These winds are resulting in hazardous seas and increasing wave heights, and are forecast to persist through the week. Isolated to scattered showers can be expected across the region for the next several days as well.


7 Day Forecast for Marine Location Near Ponce, PR
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location: 17.97, -66.62     debug


Area Discussion for - San Juan, PR
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FXCA62 TJSJ 100929 AFDSJU

Area Forecast Discussion National Weather Service San Juan PR 529 AM AST Tue Dec 10 2019

SYNOPSIS.

Somewhat calmer weather is expected today and tomorrow as some drier air works in from the east. Wetter conditions are projected for Thursday and Friday however, as a decent batch of moisture moves in. Stronger than normal easterly trade winds will continue for the next several days, helping the showers to move along quickly. However, these winds will drive hazardous seas at least into Friday. Drier weather is possible for next week.

SHORT TERM. Today through Thursday .

An approaching upper level trough has just crossed through the area with a westerly jet up to 65 knots. Flow will be turning more northwesterly later today and tomorrow. At mid levels, a cold pool accompanying the upper level trough is passing to our northeast, and will cause 500 mb temperatures to drop to around minus 9 degrees today. Precipitable water is expected to fall to 1.1 inches this afternoon however, and this will limit strong convection over land. Nevertheless, a few thunderstorms are possible over the local waters.

At the surface, high pressure has developed in the north central Atlantic with as much as 1044 mb. It will continue to drift east with central pressures of 1042-1044 mb fueling surface winds over the local waters of 15 to 20 knots that will last beyond Thursday. Bands of moisture are interspersed in the flow over the western tropical Atlantic with areas of drier air between. One of those bands moved across the local area overnight and was enhanced by the upper level trough. It is being followed by the driest air of the week. Better moisture is immediately on its heels. Moisture is also expected to increase Wednesday and Thursday and models show better shower activity driven across the local islands Thursday and Friday although timing of the best showers is uncertain.

Moisture is rich below 850 mb throughout the period and well beyond, but little is seen above 500 mb. Moisture between 850 mb and 500 mb will increase Thursday and will generate better showers. Winds will keep these moving quickly so excessive rainfall amounts are not expected.

LONG TERM. Friday through Wednesday .

Coming off what appears will be a wet Thursday, Friday will still provide scattered showers across the region. These showers will not be due to any organized weather system, but rather just a decent batch of moisture being advected in by the trade winds. The wettest period for Friday appears to be in the early morning hours, and trending drier for the rest of the day. The usual afternoon shower activity is likely in western Puerto Rico, though atmospheric conditions do not look favorable for thunderstorms at this point. A high chance for showers also exists for the east coast of Puerto Rico. Low level wind flow is still forecast to be fairly strong, so these showers will likely be moving fairly fast.

Conditions do not change much heading into the weekend. Though the chance for showers remains, slightly less moisture is forecast to move in, so a drier few days are expected. In fact, this drier trend continues into the next workweek. Forecast models still hint at the chance for some Saharan dust to move in by the middle of next week, though dust concentrations look unimpressive at this point.

AVIATION.

VFR conditions are expected to prevail across all terminals. SHRA will spread across the USVI aft 10/16Z and over ern PR aft 10/17Z with highest trrn obscured and brief MVFR at TJNR/TJMZ/TJBQ. Isold TSRA psbl mainly ovr the lcl waters aft 10/18Z. Sfc winds ENE 10-20 kt with sea breeze influences and gusts to 25 kt. Max winds WNW 50-65 kt btwn FL350-520--highest near FL400.

MARINE.

Windy conditions as a result of a strong area of high pressure in the central Atlantic has caused rough and hazardous seas across the region. Thus, Small Craft Advisories are in effect for several zones across the region, with two more going into effect later today for the offshore waters of southern Puerto Rico, and the Rincon area. This looks to be a fairly long lasting event, as seas will be impacted at least through Friday, with another swell event possibly occurring for next weekend.

PRELIMINARY POINT TEMPS/POPS. SJU 84 76 84 74 / 70 70 50 80 STT 87 75 85 75 / 70 40 40 60

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

Small Craft Advisory from 2 PM this afternoon to 8 PM AST Wednesday for Southeast.

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

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

High Rip Current Risk from this evening through late Thursday night for St Thomas. St John. and Adjacent Islands.

AM . Small Craft Advisory from 2 PM this afternoon to 8 PM AST Wednesday for Coastal Waters of Southern Puerto Rico out 10 NM.

Small Craft Advisory until 2 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 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.

Small Craft Advisory from 2 PM this afternoon to 2 AM AST Saturday for Coastal Waters OF Northwestern Puerto Rico out 10 NM.



SHORT TERM . WS LONG TERM . mb


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
42085 - Southeast of Ponce, PR 8 mi67 min NE 9.7 G 14 81°F 83°F5 ft1016.1 hPa (+1.8)
JOXP4 - Jobos Bay Reserve, Puerto Rico 21 mi82 min NE 4.1 78°F 1018 hPa71°F
MGIP4 - 9759110 - Magueyes Islands, PR 23 mi61 min ENE 2.9 G 7 81°F 81°F1018.1 hPa
MGZP4 - 9759394 - Mayaguez, PR 33 mi61 min 84°F1018.3 hPa
AROP4 - 9757809 - Arecibo, PR 36 mi55 min Calm G 0
YABP4 - 9754228 - Yabucoa Harbor, PR 42 mi55 min 85°F 73°F
PTRP4 43 mi22 min E 6 G 8.9 80°F
SJNP4 - 9755371 - San Juan, PR 43 mi55 min S 1.9 G 4.1 78°F 83°F1018 hPa
41053 - San Juan, PR 44 mi67 min ESE 7.8 G 9.7 81°F 84°F5 ft1016.7 hPa (+1.8)
41115 - Rincon, Puerto Rico (181) 45 mi37 min 84°F6 ft

Wind History for Penuelas (Punta Guayanilla), 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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Last 24hr--------------------------------------E5NE5NE5--Calm
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Tide / Current Tables for Playa de Ponce, Puerto Rico
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Playa de Ponce
Click for Map
Tue -- 05:09 AM AST     Moonset
Tue -- 06:46 AM AST     Sunrise
Tue -- 09:18 AM AST     0.76 feet High Tide
Tue -- 10:23 AM AST     0.63 feet Low Tide
Tue -- 04:49 PM AST     Moonrise
Tue -- 05:44 PM AST     0.68 feet High Tide
Tue -- 05:51 PM AST     Sunset
Tue -- 10:18 PM AST     -0.19 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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Tide / Current Tables for Playa Cortada, Puerto Rico
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Playa Cortada
Click for Map
Tue -- 05:08 AM AST     Moonset
Tue -- 06:46 AM AST     Sunrise
Tue -- 09:35 AM AST     0.76 feet High Tide
Tue -- 09:59 AM AST     0.63 feet Low Tide
Tue -- 04:48 PM AST     Moonrise
Tue -- 05:50 PM AST     Sunset
Tue -- 06:01 PM AST     0.68 feet High Tide
Tue -- 09:54 PM AST     -0.19 feet Low Tide
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 (8,2,3,4)
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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.