Saturday, December7, 2019
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Marine Weather and Tides
Aguas Claras, 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 6:40AMSunset 5:47PM Saturday December 7, 2019 1:58 AM AST (05:58 UTC) Moonrise 2:47PMMoonset 2:33AM Illumination 78% Phase: Waxing Gibbous; Moon at 10 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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AMZ725 Coastal Waters Of Southern Usvi Vieques And Eastern Puerto Rico Out 10 Nm- 924 Pm Ast Fri Dec 6 2019
Rest of tonight..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Scattered showers.
Saturday..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 8 seconds. Isolated showers.
Saturday night..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 8 seconds. Scattered showers.
Sunday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Isolated showers.
Sunday night..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 10 seconds. Scattered showers.
Monday..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 8 seconds. Isolated Thunderstorms. Scattered showers.
Tuesday..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. Isolated showers.
Wednesday..East winds 15 to 20 knots. Seas 5 to 7 feet with occasional seas up to 9 feet. Dominant period 8 seconds. East swell around 4 feet. Scattered showers.
AMZ700 924 Pm Ast Fri Dec 6 2019
Synopsis for puerto rico and the uS. Virgin islands waters... Easterly winds will persist through the weekend. This will create a light to moderate chop across portions of the local waters and passages. A north to northeasterly swell is forecast to move into the local waters starting late Sunday into Monday. This, along with increasing east to northeast winds, will create choppy and likely hazardous seas.


7 Day Forecast for Marine Location Near Aguas Claras, PR
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location: 18.23, -65.62     debug


Area Discussion for - San Juan, PR
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FXCA62 TJSJ 070144 AFDSJU

Area Forecast Discussion National Weather Service San Juan PR 944 PM AST Fri Dec 6 2019

UPDATE. After the showers that affected western PR dissipated only isolated showers remained, and by the time of this writing almost all of the shower activity across the local area had dissipated. For this reason the short term forecast was adjusted slightly to account for the latest observations. Fair weather is expected tonight with only brief isolated showers are expected across the local area. Easterly winds will prevail, which will cause some shower development across western PR on Saturday afternoon.

AVIATION. VFR conds expected through the forecast period with a slight chance of SHRA across the area tonight and through 07/16Z. Light easterly winds overnight, but will be around 10-15kt after 07/13Z with sea breeze variations developing thereafter. SHRA across western PR after 07/16Z could cause VCSH at TJBQ and TJMZ, and maybe even briefly affect the TJMZ terminal.

MARINE. The local seas will be up to 5 feet for the next few days with an easterly wind up to 15 knots. There is a low or moderate risk of rip currents across the local beaches. Seas will increase to 6 feet on Sunday and Monday, perhaps increasing a bit more by Tuesday.

PREV DISCUSSION. /issued 1230 PM AST Fri Dec 6 2019/

SYNOPSIS .

Stable weather conditions are expected through the weekend due to a mid to upper-level ridging. Nevertheless, locally and diurnally induce convection is expected to develop during the afternoons, but due to shallow moisture showers are expected to be short- lived. Early next week moisture is expected to increase as a mid- level trough impinges on the mid-level ridge.

SHORT TERM . Tonight through Sunday .

A mid-level ridge will hold across the area through the weekend and promote an easterly wind flow as well as relatively stable weather conditions. Additionally, the ridge will pull drier air into the region and increase the trade wind cap. The combination of sinking air in the mid-levels of the atmosphere, limit moisture, and instability will restrict the development of thunderstorms.

However, showers are expected to develop due to sea breeze convergence, and local effect. The strongest activity will develop over the interior and western areas of Puerto Rico during the afternoons. Current model guidance shows patches of moisture transversing the region from time to time during the short-term period. The added moisture will aid in the development of showers across the area. Otherwise, stable weather conditions with scattered to isolated showers possible mainly during the afternoons.

LONG TERM . Monday through Saturday . 415 AM AST Fri Dec 6 2019 .

Recent model guidance continued to suggest a better chance for showers and isolated thunderstorms by Monday and possibly on Tuesday, as the east to northeast trade winds will increase low level moisture convergence across the forecast area. In addition, the mid to upper level ridge is forecast to slightly erode as a polar trough moves across the west Atlantic and north of the region. The breaking down of the upper ridge will weaken the trade wind cap inversion and support better chance for afternoon shower development across the islands. Most of the moisture however will be advective and brought in from old frontal remnants north of the region. Therefore no significant or widespread rainfall accumulations are anticipated over land areas at this time.

During the latter part of the period through Friday, an upper level ridge is again forecast to build over the region. At the same time the local pressure gradient will tighten and consequently winds will increase and become more northeasterly due strong surface high pressure ridge north of the region, and a weak induced surface trough forecast to develop northeast of the area over the tropical Atlantic. This will also promote more frequent morning passing showers which should affect the northern and eastern half of Puerto Rico, as well as the U.S. Virgin Islands. In addition late Friday through Saturday, weak perturbation in the prevailing trades will bring an increase in low level moisture and therefore increase the chance for shower development during the early morning and afternoon hours.

AVIATION .

Mainly VFR conditions are expected to prevail across all terminals for the next 24 hours. However, SHRA developing from 16z- 22z could cause tempo MVFR at TJMZ. Winds will continue from the East at 10 to 15 knots with higher gusts at times.

MARINE .

Moderate easterly winds are expected to persist through the weekend. This will create a light to moderate chop across portions of the local waters and passages through today.Another northerly swell is forecast to move across the Atlantic and Caribbean Passages late Sunday into Monday. There is a moderate risk of rip currents for the northern beaches of Puerto Rico.

PRELIMINARY POINT TEMPS/POPS. SJU 76 85 75 85 / 30 20 30 30 STT 76 85 74 85 / 30 30 40 30

SJU WATCHES/WARNINGS/ADVISORIES. PR . None. VI . None. AM . None.

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


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
41056 9 mi58 min ENE 9.7 G 12 81°F 83°F3 ft1015.7 hPa (+0.0)
ESPP4 - 9752695 - Esperanza, PR 12 mi58 min NE 1.9 G 2.9 78°F 83°F1016.9 hPa (-0.4)
YABP4 - 9754228 - Yabucoa Harbor, PR 17 mi58 min 76°F 73°F
CLBP4 - 9752235 - Culebra, PR 18 mi58 min 79°F 85°F1016.8 hPa (+0.0)
41053 - San Juan, PR 30 mi58 min S 3.9 G 5.8 81°F 84°F4 ft1016.1 hPa (+0.0)
SJNP4 - 9755371 - San Juan, PR 31 mi58 min SW 5.1 G 5.1 78°F 84°F1017.1 hPa (+0.0)
JOXP4 - Jobos Bay Reserve, Puerto Rico 37 mi73 min Calm 76°F 1018 hPa70°F
CHAV3 - 9751639 - Charlotte Amalie, VI 38 mi58 min 80°F 1016.5 hPa (-0.4)
41052 - South of St. John, Virgin Islands 45 mi58 min ENE 14 G 16 83°F 83°F4 ft1015.3 hPa (-0.6)
LAMV3 48 mi58 min 80°F 83°F

Wind History for Fajardo, PR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Juan, Luis Munoz Marin International Airport, PR24 mi2 hrsN 010.00 miPartly Cloudy81°F71°F74%1017.3 hPa

Link to 5 minute data for TJSJ

Wind History from JSJ (wind in knots)
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Last 24hrCalmCalmCalmCalmSE3CalmSE4SE5E8E9E11E13E13E14E14E14E10E6E4SE4SE3CalmCalmCalm
1 day agoCalmCalmCalmCalmCalmCalmCalmCalmE33CalmE9SE7
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S8S76E7E5E4CalmCalmCalmCalmCalm
2 days agoCalmCalmCalmCalmCalmCalmCalmSE3NE4N6CalmNE8N7S7S9S7SE4S5CalmCalmCalmCalmSE3SE3

Tide / Current Tables for Roosevelt Roads, Puerto Rico
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Roosevelt Roads
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Sat -- 02:33 AM AST     Moonset
Sat -- 05:42 AM AST     0.84 feet High Tide
Sat -- 06:41 AM AST     Sunrise
Sat -- 11:57 AM AST     0.38 feet Low Tide
Sat -- 02:46 PM AST     Moonrise
Sat -- 05:05 PM AST     0.74 feet High Tide
Sat -- 05:46 PM AST     Sunset
Sat -- 11:53 PM AST     0.10 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.20.30.40.60.70.80.80.80.70.60.50.40.40.40.50.60.70.70.70.60.50.40.20.1

Tide / Current Tables for Vieques Passage, Puerto Rico Current (2)
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Vieques Passage
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Sat -- 12:45 AM AST     -0.49 knots Max Ebb
Sat -- 02:33 AM AST     Moonset
Sat -- 03:46 AM AST     0.00 knots Slack
Sat -- 06:41 AM AST     Sunrise
Sat -- 07:14 AM AST     0.65 knots Max Flood
Sat -- 10:36 AM AST     -0.00 knots Slack
Sat -- 01:54 PM AST     -0.61 knots Max Ebb
Sat -- 02:46 PM AST     Moonrise
Sat -- 05:34 PM AST     0.00 knots Slack
Sat -- 05:46 PM AST     Sunset
Sat -- 07:55 PM AST     0.29 knots Max Flood
Sat -- 10:21 PM AST     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.5-0.5-0.4-0.20.10.30.50.60.60.40.2-0.1-0.4-0.6-0.6-0.5-0.4-0.10.10.20.30.20.1-0.1

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 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.