Monday, December9, 2019
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Marine Weather and Tides
Cataño, 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 6:43AMSunset 5:49PM Monday December 9, 2019 8:40 PM AST (00:40 UTC) Moonrise 4:04PMMoonset 4:15AM Illumination 96% 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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AMZ712 Coastal Waters Of Northern Puerto Rico Out 10 Nm- 405 Pm Ast Mon Dec 9 2019
.small craft should exercise caution through tomorrow...
.small craft advisory in effect from Tuesday evening through Friday evening...
Tonight..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 7 seconds. Scattered showers.
Tuesday..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 8 seconds. Scattered showers.
Tuesday night..East winds 15 to 20 knots. Seas 5 to 7 feet with occasional seas up to 9 feet. Dominant period 8 seconds. Scattered showers.
Wednesday..East winds 15 to 20 knots. Seas 5 to 7 feet with occasional seas up to 9 feet. Dominant period 8 seconds. Northeast swell around 4 feet. Scattered showers.
Wednesday night..East winds 15 to 20 knots. Seas 5 to 7 feet with occasional seas up to 9 feet. Dominant period 8 seconds. Northeast swell around 4 feet. Scattered showers.
Thursday..East winds 15 to 20 knots. Seas 6 to 8 feet with occasional seas up to 10 feet. Dominant period 10 seconds. Northeast swell around 4 feet. Isolated showers.
Friday..East winds 15 to 20 knots. Seas 5 to 7 feet with occasional seas up to 9 feet. Dominant period 10 seconds. Northeast swell around 4 feet. Isolated showers.
Saturday..East winds 10 to 15 knots. Seas 5 to 7 feet with occasional seas up to 9 feet. Dominant period 10 seconds. Northeast swell around 4 feet. Isolated showers.
AMZ700 405 Pm Ast Mon Dec 9 2019
Synopsis for puerto rico and the uS. Virgin islands waters... Moderate easterly winds continue across the local waters, resulting in choppy seas. Higher seas due to the stronger than normal trade winds caused by a strong atlantic high pressure will persist tonight and going forward through the week. Hazardous marine conditions are forecast for portions of the local waters starting tonight and lasting through the week and into next weekend. Isolated to scattered showers can be expected across the region for the next few days.


7 Day Forecast for Marine Location Near Cata�o, PR
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location: 18.46, -66.12     debug


Area Discussion for - San Juan, PR
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FXCA62 TJSJ 091733 AFDSJU

Area Forecast Discussion National Weather Service San Juan PR 133 PM AST Mon Dec 9 2019

SYNOPSIS. Brisk east-northeast winds will continue across the islands due to a strong high pressure system over the Atlantic Ocean. Under this flow, passing showers are favored across eastern and northern Puerto Rico and over the U.S. Virgin Islands. Marine conditions will deteriorate beginning tonight and will continue hazardous for much of the workweek.

SHORT TERM. Tonight through Wednesday . A high pressure system located over the Atlantic Ocean will continue to strengthen, tightening the pressure gradient across the area. This will result in brisk east-northeast winds for the next couple of days. As a result, passing showers are favored across portions of northern and eastern Puerto Rico as well as over and around the U.S. Virgin Islands. For tonight, this activity could be a bit enhanced by the presence of a trough at the mid and upper levels located just to the north of the islands. On Tuesday, although this trough will linger north of the area, drier air is anticipated to move in, limiting the amount of moisture. Nonetheless, a few showers could still be advected over the islands. Finally, on Wednesday, the same pattern holds, but with a bit more moisture available, the frequency of showers should increase once again.

LONG TERM. Thursday through Tuesday .

Uneventful weather conditions are expected to prevail in the long-term forecast. Near average moisture will be with us, with precipitable water values mostly between 1.5 and 1.7 inches. Also, trade winds stay fairly brisk as well, helping to keep showers moving along and reducing the amount of rainfall accumulations. No major fronts or tropical waves are forecasted for the next week. Furthermore, the upper levels of the atmosphere remain less conducive to thunderstorm activity with plenty of ridging aloft.

Despite the generally average conditions in the long-term, there will still be plenty of opportunity for passing showers. Advective showers will develop in the nighttime and morning hours, threatening the east coast of Puerto Rico and the USVI, particularly Thursday and Friday when the highest moisture content will occur. Furthermore, the usual afternoon shower activity is possible, particularly for western Puerto Rico. However, for reasons mentioned in the last paragraph, these showers will likely have minimal impact. Long range models suggest drier conditions heading into the next week, with the chance for some Saharan dust working into the region. However, there is minimal confidence in that forecast this far out.

Aviation. Mostly VFR conds are expected through the forecast period. VCSH and/or -SHRA may affect the TAF sites at times, but overall VFR conds will prevail. ENE winds of 15-25 kts likely below FL250. Brief winds gusts are possible with SHRA as they pass by.

MARINE. Hazardous marine conditions are expected to begin tonight, with seas increasing between 5 to 7 feet due to an increase in winds. Winds will be out of the east-northeast at 15 to 20 knots. Small craft advisories will be in effect beginning tonight through much of the workweek. For the beachgoers, there is a moderate risk of rip currents for most of the local beaches.

PRELIMINARY POINT TEMPS/POPS. SJU 75 84 76 84 / 50 70 70 40 STT 75 86 75 85 / 40 40 40 30

SJU WATCHES/WARNINGS/ADVISORIES. PR . None. VI . None. AM . Small Craft Advisory from 8 PM this evening to 8 AM AST Friday 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-Mona Passage Southward to 17N.



SHORT TERM . ER LONG TERM . ERG PUBLIC DESK . GL


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SJNP4 - 9755371 - San Juan, PR 0 mi172 min ESE 12 G 16 84°F1016.1 hPa
41053 - San Juan, PR 1 mi100 min SE 9.7 G 14 79°F 83°F5 ft1015.6 hPa (+1.2)
AROP4 - 9757809 - Arecibo, PR 31 mi172 min NE 6 G 8
YABP4 - 9754228 - Yabucoa Harbor, PR 32 mi178 min 82°F 74°F
JOXP4 - Jobos Bay Reserve, Puerto Rico 35 mi55 min NNE 4.1 77°F 1018 hPa72°F
41056 37 mi100 min E 14 G 16 82°F 83°F4 ft1015.4 hPa (+1.4)
ESPP4 - 9752695 - Esperanza, PR 43 mi142 min 84°F
CLBP4 - 9752235 - Culebra, PR 45 mi178 min 82°F 85°F1015.7 hPa
42085 - Southeast of Ponce, PR 46 mi100 min ENE 16 G 21 82°F 84°F4 ft1014.7 hPa (+1.4)

Wind History for San Juan, PR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Juan, Luis Munoz Marin International Airport, PR7 mi1.7 hrsESE 810.00 miMostly Cloudy78°F73°F87%1016.8 hPa

Link to 5 minute data for TJSJ

Wind History from JSJ (wind in knots)
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Last 24hrCalmE6SE3CalmSE8SE3SE5S3CalmCalmCalmE19E12E18E12E11
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1 day agoE7SE3SE3SE3SE3CalmCalmCalmCalmCalmCalmCalmCalmE5E8NE8E6
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2 days agoSE4SE3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmE7E10E12E11NE13E13E13E9E10E6E5

Tide / Current Tables for San Juan, Puerto Rico (3)
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San Juan
Click for Map
Mon -- 12:12 AM AST     0.12 feet Low Tide
Mon -- 04:15 AM AST     Moonset
Mon -- 06:44 AM AST     Sunrise
Mon -- 07:20 AM AST     1.64 feet High Tide
Mon -- 01:45 PM AST     0.61 feet Low Tide
Mon -- 04:03 PM AST     Moonrise
Mon -- 05:48 PM AST     Sunset
Mon -- 06:28 PM AST     1.03 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.10.20.30.611.31.51.61.61.51.210.80.60.60.70.80.9110.90.70.50.2

Tide / Current Tables for Boca De Cangrejos, Isla Verde, San Juan, Puerto Rico
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Boca De Cangrejos
Click for Map
Mon -- 12:46 AM AST     0.05 feet Low Tide
Mon -- 04:14 AM AST     Moonset
Mon -- 06:44 AM AST     Sunrise
Mon -- 07:52 AM AST     1.36 feet High Tide
Mon -- 02:17 PM AST     0.45 feet Low Tide
Mon -- 04:03 PM AST     Moonrise
Mon -- 05:47 PM AST     Sunset
Mon -- 07:06 PM AST     0.85 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.10.10.10.30.60.91.21.31.41.31.10.90.70.50.50.50.60.70.80.80.80.70.50.3

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 (19,4,5,8)
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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.