Friday, January24, 2020
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Marine Weather and Tides
Salinas, 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 6:57AMSunset 6:15PM Friday January 24, 2020 1:09 AM AST (05:09 UTC) Moonrise 6:48AMMoonset 6:11PM Illumination 1% Phase: Waning Crescent; Moon at 29 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- 901 Pm Ast Thu Jan 23 2020
Rest of tonight..West winds 5 to 10 knots veering north after midnight. Seas 1 to 3 feet. Dominant period 8 seconds. Scattered showers.
Friday..East winds 5 to 10 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Scattered showers.
Friday night..Northeast winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 11 seconds. Scattered showers.
Saturday..Northeast winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 11 seconds. Scattered showers.
Saturday night..Northeast winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 11 seconds. Scattered showers.
Sunday..Northeast winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 11 seconds. Scattered showers.
Monday..Southeast winds 10 to 15 knots. Seas 1 to 3 feet. Dominant period 10 seconds. Scattered showers.
Tuesday..East winds 5 to 10 knots. Seas 2 feet or less. Dominant period 11 seconds. Scattered showers.
AMZ700 901 Pm Ast Thu Jan 23 2020
Synopsis for puerto rico and the uS. Virgin islands waters... A cold front is currently moving over the region. This is causing winds from the north over the atlantic waters and Mona passage, and from the west to southwest across the rest of the waters. Light to moderate variable winds will continue on Friday. A northerly swell is expected to cause hazardous seas Friday morning into Sunday. Showers will continue during the weekend as the aforementioned front lingers over the region.


7 Day Forecast for Marine Location Near Salinas, PR
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location: 17.94, -66.3     debug


Area Discussion for - San Juan, PR
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FXCA62 TJSJ 240145 AFDSJU

Area Forecast Discussion National Weather Service San Juan PR 945 PM AST Thu Jan 23 2020

UPDATE. The cold front has moved through Puerto Rico and recently reached the USVI. The wind direction is now shifting to more of a NNE direction across western PR and this change is expected to gradually be observed across eastern PR and then the USVI. The only exception is St Croix which may have more variable winds due to how light the winds are and the position of the cold front through Friday. So St croix may observe the NE winds late Friday night or Saturday.

There will be some light to moderate rain overnight for the USVI, while the rain is expected to gradually subside over PR. It would not be surprising to have several hours of persistent light to moderate rain across the northern VI tonight, with some rain at St Croix later tonight.

The area of deeper moisture will persist over the local area on Friday, and the latest guidance insists that shower development will occur on Friday across the interior and NE sections of PR as well as the local waters, a few showers in and around the USVI.

AVIATION. Winds will be variable overnight across some of the local terminals tonight, otherwise winds are expected to be from direction 340 to 020, except ISX which will have winds becoming WNW late tonight then NE after 24/15Z. Rain tonight will affect IST and ISX, causing tempo MVFR conds, VCSH elsewhere. SHRA is expected once again across PR and USVI after 24/16Z, which will cause at least VCSH at the local terminals. The winds will be light so confidence on exact location of rain and timing is low.

MARINE. Seas will become relatively choppy overnight, then hazardous on Friday morning as a northerly swell affect the local waters. The hazardous seas will continue through Sunday early afternoon and will affect mainly the Atlantic waters and local passages. There is a risk of rip currents for the north central portions of PR tonight, but then there will be a high risk from the NW to NE beaches of PR, beaches of NW Culebra and Saint Thomas on Friday.


PREV DISCUSSION. /issued 157 PM AST Thu Jan 23 2020/

SYNOPSIS . A cold front will continue to move over the region through Friday. Lingering moisture associated to the remnants of the front will continue through the weekend. A long period northerly swell will cause hazardous seas and life threatening rip currents from Friday through at least Sunday.

SHORT TERM . Today through Saturday . Scattered to numerous showers with isolated thunderstorms will continue this afternoon over sections of the interior and eastern half of Puerto Rico. Gusty winds and urban and small stream flooding will be the main threats. This activity is associated with a frontal passage that is currently moving over Puerto Rico and regional waters. Expect showers to continue tonight and through Friday across PR and the U.S. Virgin Islands. Under steering southwesterly winds, showers will move from time to time across the southwestern and southern sections of PR. On Saturday, winds turn once again from the east to northeast and this will push the remnants of the front across the USVI and the eastern half of PR. Therefore, the potential for urban and small stream flooding will continue across the USVI and PR.

LONG TERM . Sunday through Friday . from Prev Discussion . The aforementioned front as described in the short term discussion will still be with us for Sunday, driving additional shower activity. Upper level atmospheric conditions don't appear to be favorable for thunderstorms, with a ridge forecasted to build to our west in the 250mb GFS model, and a 500mb temperature of only -5 to -6 for Sunday afternoon. However, this does not mean the showers won't be impactful. With the tail of this front expected to be right over the top of us for the weekend and even lingering into Monday, areas that receive the more persistent showers could have periods of urban and small stream flooding. Low level winds during Sunday and into the workweek are mostly are forecasted to stay at or below 10 knots, causing slow-moving showers and a higher chance for flooding.

Models somewhat diverge after the weekend. The European model has us continuing to be under the front into Wednesday, while the GFS puts the front a bit to our north, with only bits of moisture moving in. Regardless, the situation appears a bit drier than this weekend, and that trend is expected to continue for the remainder of the workweek.

AVIATION . Mainly VFR conds are expected across all terminals. However, SHRA over PR may cause tempo MVFR conds at TJPS/TJMZ/TJSJ til 23/22Z and VCSH ovr TJBQ until 23/23Z. Sfc winds will be vrb as a cold front continues moving thru the area. Winds are forecast should switch to northerly in PR from west to east btwn 23/21-24/04Z but may not switch in the USVI, thus remaining more SW.

MARINE . Long period northerly swell will cause seas to build between 6-8 feet from Friday through Sunday across the Atlantic waters and passages. Light to moderate and variable winds will prevail through Friday due to a frontal passage. There is a high risk of rip currents for the north facing beaches of PR, Culebra and St. Thomas through Sunday.

PRELIMINARY POINT TEMPS/POPS. SJU 73 82 73 83 / 60 50 60 60 STT 73 83 71 82 / 50 40 50 70

SJU WATCHES/WARNINGS/ADVISORIES. PR . High Rip Current Risk from 6 AM AST Friday through Sunday afternoon for Culebra-Mayaguez and Vicinity-Northeast- Northwest-San Juan and Vicinity-Southeast.

High Rip Current Risk through Sunday afternoon for North Central.

Small Craft Advisory from 8 PM Friday to 2 AM AST Sunday for Southwest.

VI . High Rip Current Risk from 6 AM AST Friday through Sunday afternoon for St Thomas. St John. and Adjacent Islands.

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

Small Craft Advisory from 8 PM Friday to 2 AM AST Sunday for Anegada Passage Southward to 17N-Coastal Waters OF Northwestern Puerto Rico out 10 NM-Coastal Waters OF Southwestern Puerto Rico out 10 NM-Coastal Waters of Northern USVI and Culebra out 10 NM-Mona Passage Southward to 17N.



SHORT TERM . JA LONG TERM . CS PUBLIC DESK . ERG


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
JOXP4 - Jobos Bay Reserve, Puerto Rico 4 mi84 min Calm 74°F 1014 hPa72°F
42085 - Southeast of Ponce, PR 13 mi69 min NNE 3.9 G 5.8 78°F 81°F2 ft1012.2 hPa (+0.6)
YABP4 - 9754228 - Yabucoa Harbor, PR 26 mi51 min 75°F 72°F
SJNP4 - 9755371 - San Juan, PR 37 mi51 min 76°F 81°F1013.4 hPa
41053 - San Juan, PR 38 mi69 min SW 1.9 G 1.9 76°F 80°F5 ft1012.4 hPa (+0.5)
MGIP4 - 9759110 - Magueyes Islands, PR 40 mi57 min 74°F 80°F1013.9 hPa
AROP4 - 9757809 - Arecibo, PR 43 mi81 min Calm G 0
ESPP4 - 9752695 - Esperanza, PR 45 mi57 min 76°F 80°F1013.5 hPa
MGZP4 - 9759394 - Mayaguez, PR 49 mi57 min 81°F1014.1 hPa

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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Tide / Current Tables for Playa Cortada, Puerto Rico
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Playa Cortada
Click for Map
Fri -- 06:48 AM AST     Moonrise
Fri -- 07:00 AM AST     Sunrise
Fri -- 11:20 AM AST     0.57 feet High Tide
Fri -- 11:40 AM AST     0.49 feet Low Tide
Fri -- 05:44 PM AST     New Moon
Fri -- 06:11 PM AST     Moonset
Fri -- 06:15 PM AST     Sunset
Fri -- 07:10 PM AST     0.52 feet High Tide
Fri -- 11:22 PM AST     -0.43 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 Arroyo, Puerto Rico
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Arroyo
Click for Map
Fri -- 06:46 AM AST     Moonrise
Fri -- 06:58 AM AST     Sunrise
Fri -- 12:30 PM AST     0.49 feet Low Tide
Fri -- 12:34 PM AST     0.57 feet High Tide
Fri -- 05:44 PM AST     New Moon
Fri -- 06:10 PM AST     Moonset
Fri -- 06:14 PM AST     Sunset
Fri -- 08:24 PM AST     0.52 feet High 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 (0,6,7,8)
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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.