Sunday, May20, 2018 L-36.com


Marine Weather and Tides
Gu�nica, PR

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.

Sunrise 5:51AMSunset 6:56PM Sunday May 20, 2018 5:55 PM AST (21:55 UTC) Moonrise 10:59AMMoonset 12:00AM Illumination 35% Phase: Waxing Crescent; Moon at 6 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- 446 Pm Ast Sun May 20 2018
Tonight..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated showers.
Monday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated Thunderstorms in the afternoon.
Monday night..Northeast winds 5 to 10 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds.
Tuesday..East winds 10 to 15 knots. Seas 1 to 3 feet. Dominant period 7 seconds.
Tuesday night..East winds 10 to 15 knots. Seas 1 to 3 feet. Dominant period 7 seconds. Isolated showers.
Wednesday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated showers.
Thursday..East winds 10 to 15 knots. Seas 1 to 3 feet. Dominant period 7 seconds. Isolated showers.
Friday..East winds 5 to 10 knots. Seas 1 to 3 feet. Dominant period 7 seconds. Isolated showers.
AMZ700 446 Pm Ast Sun May 20 2018
Synopsis for puerto rico and the uS. Virgin islands waters... A strong surface high pressure system across the central atlantic will continue to cause moderate to fresh easterly winds across the region through the middle of the upcoming week. Some areas will continue to have fresh to locally strong winds through tonight. As a result, rough and hazardous seas will continue across the local waters through early Monday.

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 202110
afdsju
area forecast discussion
national weather service san juan pr
510 pm ast Sun may 20 2018

Synopsis Strong surface high pressure located across the
north-central atlantic will continue to influence our local
weather pattern through at least mid-week. A tutt low located
northeast of the leeward islands will move away from the area by
Wednesday and will be replaced by a ridge aloft. This ridge aloft
will remain in place across the forecast area through next
weekend.

Short term Tonight through Tuesday... The shower activity that
has been affecting western pr as well as the northern half of pr
should dissipate by early this evening. During the evening and
overnight period, mostly clear to partly cloudy skies should
prevail across the forecast area with only a few isolated showers
possible across the usvi and eastern pr. Monday and Tuesday
should feature less shower activity than what has been observed
during this past weekend as a decrease in low-level moisture is
anticipated. The mornings should feature mainly fair weather
conditions with only a few brief passing showers embedded in the
trades affecting the eastern half of pr and the usvi while
locally and diurnally induced showers are expected to develop
across western pr during the afternoon. The thunderstorm coverage
during the next few days should remain very isolated, given that
the mid-levels remain dry.

In terms of the winds, a slight decrease is expected Monday and
Tuesday with easterly winds between 10 and 20 mph with some higher
gusts.

Long term Wednesday through Monday... The aformentioned tutt low
will begin to move away beginning on Wednesday and this will allow
for a mid to upper-level ridge to establish itself over the
forecast area through next weekend. Under this ridging pattern, a
seasonable and stable weather pattern is expected across the area
with some passing showers affecting eastern pr and the usvi
during the morning hours and convection developing over the
western half of puerto rico during the afternoon. Winds will
continue to decrease during the second half of the work week as
the surface high pressure that has been the dominant weather
feature for quite some time shifts eastward and weakens. By late
next weekend into memorial day, both the GFS and ECMWF models show
another tutt low sinking southward from the northeast into the
forecast area. As a result, an increase in moisture content as
well as an increase in rain chances is possible.

Aviation MainlyVFR conditions are expected to prevail during the
next 24 hours across all the terminals. Shra over west pr should end
by 22z. Light passing trade wind showers are possible overnight
across the leeward usvi eastern pr terminals. Surface winds will
continue from the east between 15-20 kts... Decreasing 10-15
overnight.

Marine Hazardous seas up to 8 feet will continue across the
regional waters through tonight. Even though an improvement in
marine conditions is expected across all regional waters by
Monday, seas will remain choppy through at least mid-week due to
easterly winds between 10 and 20 knots continuing. A high rip
current risk continues for the north facing beaches of pr from
northwest to northeast and st. Croix through 6 am ast Monday while
for the northwest beaches of pr it will continue through Monday
afternoon.

Preliminary point temps pops
Sju 75 86 76 87 20 40 40 40
stt 78 79 78 79 20 40 40 40

Sju watches warnings advisories
Pr... High rip current risk through 6 am ast Monday for north central-
northeast-san juan and vicinity.

High rip current risk through Monday afternoon for northwest-
vi... High rip current risk through 6 am ast Monday for st croix.

Am... Small craft advisory until 8 pm ast this evening for anegada
passage southward to 17n-coastal waters of northwestern
puerto rico out 10 nm-coastal waters of northern usvi and
culebra out 10 nm-coastal waters of southern puerto rico
out 10 nm-coastal waters of southern usvi vieques and
eastern puerto rico out 10 nm.

Small craft advisory until 8 am ast Monday for 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.

Small craft advisory until 2 am ast Monday for coastal waters of
northern puerto rico out 10 nm.

Short term... Gl
long term... .Gl


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MGIP4 - 9759110 - Magueyes Islands, PR 7 mi55 min SSE 5.1 G 12 82°F 81°F1015.1 hPa (-0.3)
42085 - Southeast of Ponce, PR 22 mi115 min E 19 G 25 84°F 81°F1014.3 hPa (-1.5)
PTRP4 33 mi40 min SSE 2.9 G 5.1 79°F
41115 - Rincon, Puerto Rico (181) 34 mi55 min 82°F4 ft
AROP4 - 9757809 - Arecibo, PR 37 mi55 min E 13 G 25
JOXP4 - Jobos Bay Reserve, Puerto Rico 37 mi70 min E 12 83°F 1016 hPa71°F

Wind History for Magueyes Island, PR
(wind in knots)    EDIT      (on/off)   Help
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G18
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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------------------------------------E6CalmCalmCalmCalmCalm
1 day agoE6----------------------------------NE6CalmCalmCalm----
2 days agoE7----------------------------------E7E5E7E6E7NE5

Tide / Current Tables for Guanica, Puerto Rico
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Guanica
Click for Map
Sun -- 01:06 AM AST     0.66 feet High Tide
Sun -- 05:53 AM AST     Sunrise
Sun -- 10:58 AM AST     Moonrise
Sun -- 03:07 PM AST     -0.20 feet Low Tide
Sun -- 06:55 PM AST     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.60.70.70.60.60.50.40.40.30.20.1-0-0.1-0.1-0.2-0.2-0.2-0.1-00.10.20.30.40.5

Tide / Current Tables for Magueyes Island, Caribbean Sea, Puerto Rico
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Magueyes Island
Click for Map
Sun -- 02:27 AM AST     0.66 feet High Tide
Sun -- 05:53 AM AST     Sunrise
Sun -- 10:59 AM AST     Moonrise
Sun -- 02:49 PM AST     -0.20 feet Low Tide
Sun -- 06:55 PM AST     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.60.60.70.70.60.60.50.40.30.20.10-0.1-0.2-0.2-0.2-0.2-0.1-0.100.10.20.30.4

Weather Map and Satellite Images
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wmap_A
GOES Local Image of Puerto Rico    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.
target = "new">Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for (17,4,5,8)
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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.