Thursday, April27, 2017 L-36.com


Marine Weather and Tides
Mayag�ez, PR

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:02AMSunset 6:50PM Thursday April 27, 2017 10:36 PM AST (02:36 UTC) Moonrise 7:08AMMoonset 8:15PM Illumination 4% Phase: Waxing Crescent; Moon at 2 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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AMZ742 Coastal Waters Of Northwestern Puerto Rico Out 10 Nm- 911 Pm Ast Thu Apr 27 2017
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. Northeast swell around 4 feet.
Friday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Northeast swell around 4 feet. Scattered Thunderstorms in the afternoon.
Friday night..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds.
Saturday..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Isolated Thunderstorms in the afternoon.
Saturday night..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Isolated showers.
Sunday..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Isolated Thunderstorms. Scattered showers.
Monday..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 10 seconds. Isolated showers.
Tuesday..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 10 seconds. Isolated showers.
AMZ700 911 Pm Ast Thu Apr 27 2017
Synopsis for puerto rico and the uS. Virgin islands waters... Strong surface high pressure across the north central atlantic will move slowly south and extend into the western atlantic through the weekend, then persist north of the area through the middle of next week. This will promote moderate to locally fresh trade winds through the forecast period. Seas will gradually increase during the weekend in response to the tightening of the pressure gradient across the atlantic waters.

7 Day Forecast for Marine Location Near Mayag�ez, PR
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location: 18.22, -67.15     debug


Area Discussion for - San Juan, PR
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Fxca62 tjsj 280025
afdsju
area forecast discussion
national weather service san juan pr
825 pm ast Thu apr 27 2017

Update The afternoon showers and thunderstorms across western
puerto rico dissipates shortly after sunset leaving partly cloudy
skies across the region. Doppler radar detected isolated to
scattered passing showers across eastern sections of puerto rico
this evening. Some passing showers will continue to affect the
eastern half of puerto rico as well as vieques and culebra
overnight. For Friday and Saturday a similar weather pattern is
expected with showers in the morning across windward areas
followed by afternoon showers and thunderstorms across west puerto
rico, however intensity and coverage will increase as a trough
establishes north of the area.

Aviation MostlyVFR conditions are expected across the local
flying area through 28/06z. After that, vcsh are expected across
the leeward and usvi TAF sites, with mountain obscurations in
luquillo range. Afternoon shra/tsra expected again after 29/16z in
western pr. Latest tjsj sounding indicated an easterly wind flow
up to 20 knots from the surface to around 12k feet, becoming
westerly and stronger aloft.

Marine Moderate to locally fresh trade winds will continue for
the next several days, as strong surface high pressure across the
central atlantic will maintain a fairly tight local pressure
gradient. Short periods wind driven seas are still expected to
increase across the offshore waters and passages during the
weekend. Overall, winds should remain between 15-20 knots and
highest seas around 6 feet during the weekend across these waters.

Moderate risk of rip currents expected across much of the
northern and southern beaches of the islands.

Prev discussion /issued 312 pm ast Thu apr 27 2017/
short term... Rest of today through Sunday... Precipitable water
values are expected to increase to around 2 inches by Friday pwat
values will remain nearly 2 inches thru Saturday due to subtle low
level convergence along an old boundary now lingering across the local
caribbean waters. A gradually deepening trough in the upper levels... Now
approaching the windward passage is expected to reach the local region
and enhance upper level dynamics across the area beginning Friday.

After the trough passes late Saturday, weak short waves and the approach
of a jet from the northwest will continue to provide ventilation across
the area despite slowly diminishing moisture. Showers and thunderstorms
will be a daily development,mainly over the western and interior portion
of the island with some showers on the windward side during the late
night and early morning hours Friday through Sunday. Expect areas of
afternoon urban and small stream flooding in these areas-- especially
Friday and Saturday. A tutt low is expected to develop north of the
area late Sunday.

High pressure at the surface in the north central atlantic will diminish,
but move south and then westward, effectively increasing the local pressure
gradient and winds across the area Friday night through Saturday. By
Sunday this will result in a return of the high risk of rip currents
to the north coast and possibly the eastern tip of saint croix.

Long term... Monday through Friday...

tutt pattern will develop and linger north to northeast of the
region late Sunday through Monday to provide instability across
the northeastern caribbean. This will aid the development and
enhancement of showers and possible isolated thunderstorms at
least through Tuesday. Thereafter, an upper ridge is forecast to
build from the west and surface high is to relocate just north of
the islands. This pattern will increase the trade winds inversion
and limit moisture availability to below 850 mb from Wednesday
through rest of the the forecast period. By then trade wind
showers and streamers are expected mainly across the usvi's,
culebra and vieques. Across the interior and western portions of
puerto rico, mainly locally and diurnally induced showers are
expected.

Aviation... Shra/tsra in progress over pr will continue thru 27/21z
then dissipate by 28/01z. LCL MVFR/ifr in shra and mtn obscurations,
butVFR expected to prevail elsewhere. Shra will incrs aft 28/06z
mainly alg E coast pr, with mtn obscurations in luquillo range.

Afternoon shra/tsra expected again aft 28/16z in WRN pr. Winds 5 to
15 kt with sea/land breeze variations. Maximum winds wnw 50 kt at
fl410 by 28/18z.

Marine... Moderate to locally fresh trade winds will continue for the
next several days, as strong surface high pressure across the central
atlantic will maintain a fairly tight local pressure gradient.

Short periods wind driven seas are still expected to increase across
the offshore waters and passages during the weekend. Overall, winds
should remain between 15-20 knots and highest seas around 6 feet
during the weekend across these waters. Moderate risk of rip currents
expected across much of the northern and southern beaches of the
islands.

Preliminary point temps/pops
Sju 76 86 75 86 / 50 50 30 40
stt 76 86 74 86 / 40 40 40 40

Sju watches/warnings/advisories
Pr... None.

Vi... None.

Am... None.

Short term... Jf
long term... .99


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MGZP4 - 9759394 - Mayaguez, PR 0 mi49 min E 1.9 G 6 1015.4 hPa
PTRP4 11 mi32 min E 2.9 G 6 76°F
41115 - Rincon, Puerto Rico (181) 13 mi44 min 82°F3 ft
MGIP4 - 9759110 - Magueyes Islands, PR 18 mi49 min ENE 1.9 G 4.1 80°F 82°F1015.6 hPa
IMGP4 18 mi32 min E 6 G 8.9 79°F
AROP4 - 9757809 - Arecibo, PR 30 mi49 min ESE 6 G 8 79°F
MISP4 - 9759938 - Mona Island, PR 43 mi49 min 78°F 82°F1015.4 hPa

Wind History for Mayaguez, PR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Aquadilla, Rafael Hernandez Airport, PR19 mi1.8 hrsESE 810.00 miMostly Cloudy77°F73°F89%1016.3 hPa

Wind History from JMZ (wind in knots)
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Last 24hr----------------------------------------------NW6
1 day ago------------------------------------------------
2 days ago------------------------------------------------

Tide / Current Tables for Mayaguez, Puerto Rico
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Mayaguez
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Thu -- 03:35 AM AST     0.13 feet Low Tide
Thu -- 06:03 AM AST     Sunrise
Thu -- 07:08 AM AST     Moonrise
Thu -- 08:49 AM AST     1.06 feet High Tide
Thu -- 03:01 PM AST     -0.28 feet Low Tide
Thu -- 06:48 PM AST     Sunset
Thu -- 08:15 PM AST     Moonset
Thu -- 09:50 PM AST     1.84 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
10.60.30.20.10.30.50.811.110.70.40.1-0.2-0.3-0.20.10.611.51.81.81.7

Tide / Current Tables for Puerto Real, Puerto Rico
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Puerto Real
Click for Map
Thu -- 03:30 AM AST     0.09 feet Low Tide
Thu -- 06:03 AM AST     Sunrise
Thu -- 07:08 AM AST     Moonrise
Thu -- 08:46 AM AST     0.77 feet High Tide
Thu -- 02:56 PM AST     -0.20 feet Low Tide
Thu -- 06:48 PM AST     Sunset
Thu -- 08:15 PM AST     Moonset
Thu -- 09:47 PM AST     1.34 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.70.50.20.10.10.20.40.60.70.80.70.50.30-0.1-0.2-0.10.10.40.81.11.31.31.2

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 (22,6,7,8)
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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.