Friday, January19, 2018 L-36.com


Marine Weather and Tides
La Parguera, PR

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 7:00AMSunset 6:15PM Friday January 19, 2018 1:10 PM AST (17:10 UTC) Moonrise 8:46AMMoonset 8:32PM Illumination 9% Phase: Waxing Crescent; Moon at 3 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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AMZ745 Coastal Waters Of Southwestern Puerto Rico Out 10 Nm- 1000 Am Ast Fri Jan 19 2018
Rest of today..Southeast winds 5 to 10 knots. Seas 1 to 3 feet. Dominant period 8 seconds. Isolated showers.
Tonight..East winds 5 to 10 knots. Seas 1 to 3 feet. Dominant period 10 seconds.
Saturday..East winds 5 to 10 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 11 seconds. Northwest swell around 4 feet in the afternoon. Scattered showers.
Saturday night..East winds 5 to 10 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 11 seconds. Northwest swell around 4 feet. Scattered showers.
Sunday..East winds 5 to 10 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 10 seconds. Northwest swell around 4 feet. Isolated showers.
Monday..East winds 5 to 10 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Scattered showers.
Tuesday..East winds 5 to 10 knots. Seas 1 to 3 feet. Dominant period 8 seconds. Scattered showers.
AMZ700 1000 Am Ast Fri Jan 19 2018
Synopsis for puerto rico and the uS. Virgin islands waters... A frontal boundary will remain stalled north of the region through at least Monday. As a result moderate easterly trade winds will continue across the region. Moderate to fresh trades are forecast to return later next week as another surface high pressure is forecast to build north of the region and increase the local pressure gradient. A long period northwest to north swell will reach the atlantic waters and local passages by Saturday.

7 Day Forecast for Marine Location Near La Parguera, PR
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location: 17.97, -67.05     debug


Area Discussion for - San Juan, PR
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Fxca62 tjsj 191613 aaa
afdsju
area forecast discussion... Updated
national weather service san juan pr
1213 pm ast Fri jan 19 2018

Update Precipitable water has been nearly flat during the last
36 hours as precipitable waters hover near 1.5 inches. Clouds and
showers have persisted in the atlantic waters--some with moderate
rain, but all of these were moving toward the west northwest at
about 16 kt. According to the mimic product the bulk of the
moisture has already moved out of the forecast area and drier air
is poised to move in later tonight. Although moisture increases
somewhat Saturday, Sunday morning is expected to be much drier in
the gfs. May adjust the grids for tomorrow if afternoon
precipitation for western puerto rico does not manifest.

Aviation Areas of mtn obscurations may be seen across western
pr, but otherwiseVFR conds are expected to prevail. Any MVFR
conds in the leeward islands should disappear before 19 18z. Sct shra
will dvlp across WRN pr but end by 20 00z. Sfc winds east 10-15
kt. Maximum winds genly 30-40kt btwn fl380-500, but 19 12z
sounding showed 50 kt at fl450.

Marine Seas in latest model run are not as close to 8 feet in
the atlantic waters as in prior runs. Buoys to our north are
running low enough so as to give good confidence in at least post-
poning the arrival of 7 foot seas in all but the outer atlantic
waters and the northwest portion of the inner atlantic waters.

Some areas not already under and SCA are likely to have scas by
Saturday night.

Prev discussion issued 447 am ast Fri jan 19 2018
synopsis... At the surface, high pressure system located across
the southeastern u.S. Will move across the western atlantic
through the weekend. Patches of low level moisture embedded in
the trades will affect the local area from time to time. A frontal
boundary will stall north of the region through at least Saturday
and will become a weak shearline.

Short term... Today through Sunday... This might sound familiar but
a mid to upper level ridge is anchored across the forecast region
through Sunday. At the surface north of puerto rico there is light
to northeast flow. Recent skew-t sounding shows drier air in the mid
to upper level of the atmosphere but advancing further in time it
shows the drier air decreasing slightly today. This is a result of
the low to mid level moisture which moved in yesterday, another
round of moisture will move across puerto rico and the u.S. Virgin
islands later today. The increase in low to mid level moisture along
with strong easterly trades will spark convection across the
atlantic waters, portions of northeast pr and interior today.

A low level ridge will build north of the forecast area thus
creating a strong pressure gradient that will bring breezy
conditions, and possible trade wind showers and streamers early
Saturday across portion of northern puerto and the eastern u.S.

Virgin islands. The increase trade winds will cause the cap
inversion to also increase across the region this weekend.

Precipitable water values will decrease to 1.0 to 1.5 inches on
Saturday this combined with the strong cap inversion should hinder
convection from organizing this weekend.

Long term... Monday through Saturday... Upper level ridge will
hold through the forecast period. Patches of low level moisture
embedded in the trade winds are forecast to affect the local
region as fresh trade winds dominates the northeast caribbean.

Aviation...VFR conditions are expected to prevail across all
terminals. -shra are possible for terminals tist, tisx and tjsj by
19 12z while other terminals could see light trade wind showers are
periodically through the day. Sfc wind out of east to northeast at
10 to 20 kt.

Marine... Seas up to 6 feet and winds up to 15 knots are expected
to prevail across the local waters today. A long dominant period
northwest to north swell will reach the atlantic waters and local
passages by Saturday. As a result, small craft advisories has been
issued for the atlantic waters and local passages from Saturday
morning through at least Monday morning. Please, refer to coastal
waters products for the latest information.

Preliminary point temps pops
Sju 84 73 85 74 30 30 30 20
stt 83 74 84 74 20 30 40 20

Sju watches warnings advisories
Pr... Vi... None.

Am... Small craft advisory from 8 am Saturday to 2 pm ast Sunday for
coastal waters of northern puerto rico out 10 nm.

Small craft advisory from 8 am Saturday to 8 am ast Monday for
atlantic waters of puerto rico and usvi from 10 nm to 19.5n.

Short term... Ws
long term... .Ws


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
42085 - Southeast of Ponce, PR 29 mi71 min E 12 G 14 82°F 81°F1017 hPa (+0.0)
AROP4 - 9757809 - Arecibo, PR 40 mi41 min NE 8.9 G 13
JOXP4 - Jobos Bay Reserve, Puerto Rico 44 mi86 min E 8.9 84°F 1019 hPa73°F
MISP4 - 9759938 - Mona Island, PR 48 mi41 min 81°F 81°F1018 hPa

Wind History for Magueyes Island, PR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure

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Tide / Current Tables for Magueyes Island, Caribbean Sea, Puerto Rico
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Magueyes Island
Click for Map
Fri -- 01:30 AM AST     -0.16 feet Low Tide
Fri -- 07:02 AM AST     Sunrise
Fri -- 08:46 AM AST     Moonrise
Fri -- 11:36 AM AST     0.54 feet High Tide
Fri -- 06:15 PM AST     Sunset
Fri -- 08:32 PM AST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.1-0.2-0.2-0.1-0.100.10.20.30.40.50.50.50.50.50.40.40.30.20.20.10.10-0

Tide / Current Tables for Guanica, Puerto Rico
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Guanica
Click for Map
Fri -- 01:48 AM AST     -0.16 feet Low Tide
Fri -- 07:02 AM AST     Sunrise
Fri -- 08:45 AM AST     Moonrise
Fri -- 10:14 AM AST     0.54 feet High Tide
Fri -- 06:14 PM AST     Sunset
Fri -- 08:32 PM AST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.1-0.2-0.2-0.1-0.10.10.20.30.40.50.50.50.50.50.40.40.30.30.20.20.10.10-0

Weather Map and Satellite Images
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Weather Map
wmap_A
IR Satellite Image from GEOS
carb_satellite

GOES Local Image of Puerto Rico    EDIT
Geos

Wind Forecast for (12,3,4,5)
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Ground Weather Radar Station Puerto Rico,Virgin Islands
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weather_mapweather_map weather_map

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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.