Thursday, May25, 2017 L-36.com


Marine Weather and Tides
Gu�nica, PR

Version 3.4
What's New / NOTES
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 5:50AMSunset 6:58PM Thursday May 25, 2017 4:10 PM AST (20:10 UTC) Moonrise 5:45AMMoonset 6:58PM Illumination 0% Phase: New Moon; Moon at 0 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- 1032 Am Ast Thu May 25 2017
Rest of today..Southeast winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 11 seconds.
Tonight..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds.
Friday..Southeast winds 5 to 10 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds.
Friday night..East winds 5 to 10 knots. Seas 1 to 3 feet. Dominant period 10 seconds. Isolated showers.
Saturday..Northeast winds 10 to 15 knots. Seas 1 to 3 feet. Dominant period 10 seconds. Isolated showers.
Sunday..Northeast winds 10 to 15 knots. Seas 1 to 3 feet. Dominant period 8 seconds. Isolated Thunderstorms, then isolated showers.
Monday..East winds 10 to 15 knots. Seas 2 feet or less. Dominant period 7 seconds. Isolated showers.
AMZ700 1032 Am Ast Thu May 25 2017
Synopsis for puerto rico and the uS. Virgin islands waters... A broad surface high pressure will hold over the central atlantic through the weekend. Moderate trade winds will continue through early next week. A 4 to 5 feet long dominant period northeasterly swell will continue across the atlantic waters and passages through late tonight. A tropical wave is expected to increase winds by next Tuesday across the caribbean waters.

7 Day Forecast for Marine Location Near Gunica, PR
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location: 17.97, -66.92     debug


Area Discussion for - San Juan, PR
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Fxca62 tjsj 251644
afdsju
area forecast discussion
national weather service san juan pr
1244 pm ast Thu may 25 2017

Update
Another hazy day with warm temperatures across the islands
prevailed today. Suspended dust particles will continue to move
across the islands through at least Friday. However, shower
formation is expected across the interior and west puerto rico
during the afternoon hours, elsewhere hazy skies with no shower
activity.

Aviation
Hazy skies with visibilities between 6 and 9 nm are expected to
continue through the fcst period. Shra -shra are possible in the
vcty of tjmz, elsewhere easterly winds between 10 and 20 knots
with higher gusts. Aft 25 233z expect easterly winds at 10 knots
or less.

Marine
A northerly swell at 3 to 5 feet was observed moving across the
nearshore waters. This swell is expected to affect the region
through the evening. Also, the nearshore buoys observed easterly
winds at 15 to 20 knots. Then, mariners can expect seas between 3
and 5 feet and winds at 15 knots or less.

Prev discussion issued 409 am ast Thu may 25 2017
synopsis... Broad surface high pressure will continue across the
central atlantic. Sal will linger through the end of the week.

Overall fair weather expected to continue through the weekend. An
upper level trough is forecast to move over the area by early
next week. A tropical wave is expected to enter the eastern
caribbean by Tuesday.

Short term... Today through Saturday...

partly cloudy skies prevailed across puerto rico and the u.S. Virgin
islands overnight. Doppler radar detected some light showers mainly
across the coastal waters. A very dry airmass will continue to
dominate the local region for the next few days as an upper level
ridge continues dominating the region. Saharan dust will continue
across the region today. As a result, hazy skies can be expected.

Once again, a southeast wind flow will promote higher than normal
temperatures along the northern slopes of puerto rico this
afternoon. As a result, near record maximum temperatures can be
expected.

Upper level ridge will weaken by Friday. As a result, an increase in
moisture is expected for Friday and Saturday with a return to normal
weather conditions with shower and thunderstorm development expected
to occur across the interior and west sections of puerto rico
during the afternoons.

Long term... Sunday through Friday...

an upper level low and an associated trough to the east northeast
of the region is expected to drift northeastward while weakening
Sunday through early in the upcoming week. Another upper level
low and an associated trough is expected to develop over the
southwestern atlantic early in the week, amplifying across the
northeast caribbean Tuesday and Wednesday. Surface high pressure
across the central atlantic is expected to maintain moderate
easterly trade winds across the region until early next week.

Winds are expected to become from the east to east northeast by
mid week and the from the east southeast for the rest of the
period. Optical thickness model guidance suggests a relaxation in
the saharan air layer across the region during the weekend and
for the upcoming week with only some particulates of dust
suspended in the air. Expect the continuation of a relatively dry
weather pattern across the local islands during the weekend with
only the typical diurnal induce afternoon shower activity over
western and interior pr. Latest surface analysis depicted a
tropical wave across the tropical atlantic. This wave will
continue to move westward and approach to the lesser antilles
Sunday and Monday. It is then forecast to move over the eastern
caribbean and over the local islands Tuesday through Wednesday.

This feature in combination with an upper trough should bring an
increase in tropical moisture transport and consequently increase
the chance for showers and thunderstorms over the local islands
and surrounding waters next week.

Aviation...VFR conditions will prevail across all TAF sites through
at least 25 16z. Vcsh can be expected across tjmz and tjbq with
mountain obscurations. Low level winds will be mainly southeast at
10 to 15 kts with higher gusts.

Marine...

long period northeasterly swell of 4 to 5 feet will continue to
affect the atlantic waters and passages through late tonight.

There is a high risk of rip current for northwest through
north central and san juan and vicinity beaches.

Preliminary point temps pops
Sju 78 89 77 89 10 40 40 40
stt 78 87 77 88 10 40 40 40

Sju watches warnings advisories
Pr... High rip current risk until 6 pm ast this evening for north
central-northwest-san juan and vicinity-western interior.

Vi... None.

Am... None.

Short term... Cam
long term... .Cam
aviation... Cam


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MGIP4 - 9759110 - Magueyes Islands, PR 7 mi41 min SSE 7 G 11 85°F 84°F1015.5 hPa
IMGP4 7 mi16 min ESE 9.9 G 17 85°F
MGZP4 - 9759394 - Mayaguez, PR 21 mi41 min WNW 7 G 11 85°F 88°F1015.3 hPa
42085 - Southeast of Ponce, PR 22 mi41 min E 18 G 21 84°F 1014.6 hPa
PTRP4 33 mi16 min NE 7 G 13 86°F
41115 - Rincon, Puerto Rico (181) 34 mi18 min 84°F3 ft
JOXP4 - Jobos Bay Reserve, Puerto Rico 37 mi86 min E 8.9 86°F 1017 hPa73°F
AROP4 - 9757809 - Arecibo, PR 37 mi41 min ENE 8.9 G 15 85°F

Wind History for Magueyes Island, PR
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure

Wind History from JPS (wind in knots)
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Last 24hr----------------------SE10E10--------NE5NE5NE5--NE5--NE5
1 day ago----------------------------------CalmCalm--CalmCalmCalm--
2 days ago------------------------------------CalmCalmCalmNE5--NE6

Tide / Current Tables for Guanica, Puerto Rico
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Guanica
Click for Map
Thu -- 05:45 AM AST     Moonrise
Thu -- 05:52 AM AST     Sunrise
Thu -- 12:36 PM AST     -0.21 feet Low Tide
Thu -- 03:46 PM AST     New Moon
Thu -- 06:57 PM AST     Sunset
Thu -- 06:57 PM AST     Moonset
Thu -- 09:25 PM AST     0.71 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.60.50.40.40.30.20.10.10-0.1-0.1-0.2-0.2-0.2-0.2-0.10.10.30.40.60.70.70.70.7

Tide / Current Tables for Magueyes Island, Caribbean Sea, Puerto Rico
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Magueyes Island
Click for Map
Thu -- 05:45 AM AST     Moonrise
Thu -- 05:52 AM AST     Sunrise
Thu -- 12:18 PM AST     -0.21 feet Low Tide
Thu -- 03:46 PM AST     New Moon
Thu -- 06:57 PM AST     Sunset
Thu -- 06:58 PM AST     Moonset
Thu -- 10:47 PM AST     0.71 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.60.60.50.40.30.30.20.10-0.1-0.1-0.2-0.2-0.2-0.2-0.100.20.30.50.60.70.70.7

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 (16,3,4,5)
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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.