Saturday, April20, 2019 L-36.com


Marine Weather and Tides
La Parguera comunidad, PR

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 6:06AMSunset 6:46PM Saturday April 20, 2019 4:41 AM AST (08:41 UTC) Moonrise 8:11PMMoonset 7:09AM Illumination 99% Phase: Full Moon; Moon at 16 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- 431 Am Ast Sat Apr 20 2019
.small craft should exercise caution...
Today..Southeast winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds.
Tonight..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Isolated showers through the night.
Sunday..Southeast winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Scattered showers.
Sunday night..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Isolated showers through the night.
Monday..East winds 5 to 10 knots. Seas 1 to 3 feet. Dominant period 10 seconds. Isolated showers.
Tuesday..East winds 5 to 10 knots. Seas 2 feet or less. Dominant period 10 seconds. Isolated showers.
Wednesday..Northeast winds 5 to 10 knots. Seas 2 feet or less. Dominant period 10 seconds. Isolated showers.
AMZ700 431 Am Ast Sat Apr 20 2019
Synopsis for puerto rico and the uS. Virgin islands waters... As a surface high pressure builds across the north-central atlantic, winds will increase slightly. Winds will be moderate to fresh from the east and continue through the weekend. This will result in choppy seas across the regional waters into the weekend with hazardous seas in the northeast outer atlantic waters and around the northwest corner of puerto rico.


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


Area Discussion for - San Juan, PR
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Fxca62 tjsj 200133
afdsju
area forecast discussion
national weather service san juan pr
933 pm ast Fri apr 19 2019

Update Predominantly fair weather is expected tonight across
the local islands. There are a few showers around but these are
moving quickly and leaving minimal accumulations of rain. These
isolated showers are expected through the night, but otherwise
mainly fair weather is expected. The wind will diminish slightly
later tonight. As of now we are observing winds of 10-15 mph,
which will decrease to 5-10 mph or so later, but then increase in
the morning hours to 15-20 mph with higher gusts. The overall
moisture and weather pattern is expected to be largely unchanged
for tomorrow, so fair weather is expected across the local islands
with a chance of rain across western pr in the afternoon. The rain
for the afternoon was very minimal today and tomorrow may be a bit
more but at this time it doesn't look like it will be too
significant. The winds are just too strong and it should make the
rain move offshore fairly quickly.

Aviation PrevailingVFR conds expected for the next 24 hours
across the local terminals. There is a chance for brief shra near
and around tjbq and tjmz between 20 18z and 20 21z. Easterly winds
at around 10kt expected overnight, a bit lighter at tjmz, tjps
and tjsj after 20 06z. Winds will increase once again at 15-20kt
and gusty after 20 13z, generally from the east but sea breeze
variations will be a factor.

Marine Choppy seas expected this weekend as seas will be up to
6 feet and the local winds will be up to 20 knots. There is a
moderate risk of rip currents across most of the local beaches in
pr and saint croix, as well as northwestern and western saint
thomas.

Prev discussion issued 325 pm ast Fri apr 19 2019
synopsis... An upper level omega blocking pattern continues over
the western atlantic with a large amplitude upper level trough low
over the central atlantic, another upper level trough low across
the eastern third of u.S. And an upper ridge of high pressure
sandwiched in between them. This upper level ridge is expected to
continue to build across the central and eastern caribbean. At the
surface... A frontal boundary extending from the closed low over
the central atlantic southwestward to north of the islands will
slowly drift southward and may have an impact on the local weather
conditions by the start of next week.

Short term... Tonight through Sunday night... Upper ridge mentioned
before, and associated strong mid upper level subsidence will
tend to limit shower activity across the local area. Still, local
effects, combined with any available moisture, will definitely
play a role in the resultant weather conditions. Therefore,
isolated to widely scattered nighttime and early morning showers
could still be possible over the usvi and eastern pr during this
period. Scattered afternoon showers could also occur over the
west-central portions and west coast of the big island of puerto
rico. The upper low over the central atlantic, and associated
frontal boundary, will continue to drift southward through this
period. Strong wind flow associated with a surface high pressure
ridge north of the front will help advect patches of moisture over
the local area. This, coupled with enhanced low level convergence,
could result in an increased in the shower activity over the usvi
and eastern pr especially Saturday through Sunday night.

Long term... Sunday through Friday... Models still indicate that
the low and associated frontal boundary north of the area will
continue to move south with the front moving across the local
islands as a "backdoor front" i.E. From the northeast Monday and
Monday night. Decided to keep scattered to numerous
showers... Especially over the eastern half of the forecast area
(eastern pr usvi) to account for this. Too early to have a clear
idea as to the amount of precip we could expect with this system,
but uncertainty should diminish as the time progresses. Models
also now show that there will be a frontal passage with the
boundary moving to our south before dissipating Monday night. By
Tuesday... The low begins to lift northward away from the northeast
caribbean. A return to a mostly easterly flow is expected which
will continue to advect small patches of low level moisture from
time to time.

Aviation...VFR conditions will prevailed across the local
flying area through the fcst prd. Shra development are expected
in the vicinity of mayaguez between 19 18z-23z, possibly affecting
tjmz tjbq. Brief passing shra cannot be ruled out across e-pr usvi
and leeward islands terminals at times. Winds will be from the e
at 15 to 20 knots with higher gusts and sea breeze variations
dropping at 10 knots or less aft 19 23z.

Marine... A tight pressure gradient will continue across the
northeast caribbean at least through Sunday. This will keep
marine conditions on the rough side with seas up to 6 feet and
winds in the 15 to 20 knots range. Although there is no a small
craft advisory in effect at this time... Small craft operators are
advised to exercise caution while navigating over the coastal
waters. The risk of rip currents remains up to moderate for many
beaches in pr and usvi. Nevertheless, even if the risk is low... Beachgoers
are also urged to exercise caution when entering the water as rip
currents could develop unexpectedly.

Preliminary point temps pops
Sju 75 87 75 85 20 30 40 40
stt 75 87 75 86 20 30 40 30

Sju watches warnings advisories
Pr... None.

Vi... None.

Am... None.

Short term... Ja
long term... .99


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MGIP4 - 9759110 - Magueyes Islands, PR 0 mi53 min E 4.1 G 8 77°F 80°F1016.3 hPa
MGZP4 - 9759394 - Mayaguez, PR 18 mi59 min 72°F 82°F1016.1 hPa
42085 - Southeast of Ponce, PR 29 mi101 min ENE 18 G 21 80°F5 ft1015.1 hPa (-1.0)
PTRP4 29 mi36 min E 7 G 9.9 73°F
41115 - Rincon, Puerto Rico (181) 31 mi41 min 81°F3 ft
AROP4 - 9757809 - Arecibo, PR 40 mi53 min ESE 2.9 G 4.1
JOXP4 - Jobos Bay Reserve, Puerto Rico 44 mi116 min NE 4.1 76°F 1018 hPa67°F
MISP4 - 9759938 - Mona Island, PR 48 mi53 min 76°F 80°F1016.4 hPa

Wind History for Magueyes Island, PR
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Airport Reports
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Tide / Current Tables for Magueyes Island, Caribbean Sea, Puerto Rico
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Magueyes Island
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Sat -- 06:08 AM AST     Sunrise
Sat -- 07:08 AM AST     Moonset
Sat -- 01:25 PM AST     -0.10 feet Low Tide
Sat -- 06:46 PM AST     Sunset
Sat -- 08:10 PM AST     Moonrise
Sat -- 10:59 PM AST     0.53 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.50.40.40.30.30.30.20.20.20.10-0-0.1-0.1-0.1-0.100.10.20.30.40.50.50.5

Tide / Current Tables for Guanica, Puerto Rico
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Guánica
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Sat -- 12:58 AM AST     0.48 feet Low Tide
Sat -- 06:07 AM AST     Sunrise
Sat -- 07:08 AM AST     Moonset
Sat -- 07:51 AM AST     0.62 feet High Tide
Sat -- 12:32 PM AST     -0.06 feet Low Tide
Sat -- 06:45 PM AST     Sunset
Sat -- 08:10 PM AST     Moonrise
Sat -- 10:36 PM AST     0.80 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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Weather Map and Satellite Images
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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.
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Wind Forecast for (4,6,7,8)
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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.