Wednesday, February20, 2019 L-36.com


Marine Weather and Tides
Mayagüez, 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 6:51AMSunset 6:32PM Wednesday February 20, 2019 2:08 PM AST (18:08 UTC) Moonrise 7:50PMMoonset 7:46AM Illumination 98% Phase: Waning Gibbous; 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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AMZ742 Coastal Waters Of Northwestern Puerto Rico Out 10 Nm- 1026 Am Ast Wed Feb 20 2019
.small craft should exercise caution...
Rest of today..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 7 seconds.
Tonight..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 7 seconds. Isolated showers through the night.
Thursday..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 8 seconds. Isolated showers.
Thursday night..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 10 seconds. Isolated showers through the night.
Friday..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 10 seconds. Northeast swell around 4 feet. Isolated showers.
Saturday..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 11 seconds. Northeast swell 4 to 5 feet. Isolated showers.
Sunday..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 10 seconds. Isolated showers.
AMZ700 1026 Am Ast Wed Feb 20 2019
Synopsis for puerto rico and the uS. Virgin islands waters... A surface high pressure moving across the western atlantic, north of the region, will result in fresh to locally strong easterly wind through at least Friday. Under this wind flow, hazardous marine conditions are expected through the end of the week.


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 201513
afdsju
area forecast discussion
national weather service san juan pr
1113 am ast Wed feb 20 2019

Update An area of low level clouds and showers embedded on the
trade winds will continue to move across the u.S. Virgin islands
and puerto rico through the afternoon hours. This rainfall
activity should result in mostly minor rainfall amounts across the
islands. Breezy conditions will continue through Thursday under a
15-25 kt east-northeast wind flow. Day time temperatures should
range in the low to mid 70s across the higher elevations and under
the mid 80s across coastal areas. Otherwise, no change from
previous forecast.

Aviation MainlyVFR conditions expected to prevail. However,
trade wind showers and sct-bkn CIGS btw fl030-fl060 will continue
across tist and the pr terminals through at least 22z. Latest 12z
tjsj upper air sounding indicated east-northeast winds around 20
kt blo fl030.

Marine Coastal buoys were indicating seas between 3-5 feet and
east winds between 15-20 knots. Winds will gradually continue to
increase through Thursday and this will create hazardous seas
across most of the regional waters, seas are expected to increase
between 6-8 feet and small craft advisories are in effect. Please
refer to latest mariner weather message (mwwsju) for more
information.

Prev discussion issued 657 am ast Wed feb 20 2019

Synopsis
Cloudy conditions with passing showers will affect portions of the
islands throughout the day. However, a mid to upper level ridge
will promote stable weather conditions across the region. A
surface high pressure moving north of the region across the
atlantic waters will result in breezy trade winds through at least
Friday.

Short term... Today through Friday...

mid to upper-level ridge will continue to yield stable weather
conditions aloft and a robust inversion between the 700 and 775 mb
layer. This will prevent the development of deep convection and
therefore heavy rainfall activity through the period. However, just
enough low-level moisture will be present to result some light to
moderate trade wind showers across the area through the end of the
week. For today, a patch of low-level moisture will move across the
area. This will result in periods of brief showers affecting the
usvi and eastern portions of pr during the morning hours followed by
additional activity during the afternoon hours, mainly over eastern
pr. Less shower activity is expected on Thursday as drier air in the
low-levels moves overhead. Another round of trade wind showers is
expected on Friday as a band of higher low-level moisture, in
association with the remnants of a frontal boundary, moves over
the area. Once again, most of the shower activity is expected to
be concentrated across the eastern half of pr and the usvi.

Rainfall accumulations for the most part should remain light with
some minor ponding of water on roadways possible.

Windy conditions are also expected through the period. Strong
surface high pressure moving off the east coast of the united states
and across the western atlantic will result in a tightening of the
local pressure gradient. This will result in winds ranging between
15 and 25 mph with higher gusts, especially near showers. Highest
winds are expected from the mid morning through early evening hours
each day.

Long term... Saturday through Thursday...

forecast soundings continues to suggest dry air at mid levels,
but enough low level moisture to result in trade wind showers from
time to time. Although a stable weather pattern will persist
during the long term, model guidance suggested an increase of low
level moisture and wind surface convergence late in the forecast
period. If this pattern holds, frequent patches of clouds and
quick passing showers could be expected Tuesday through Thursday.

However, confidence is low due to the amount of uncertainty
associated with the end of the forecast cycle.

Aviation...

mainlyVFR conditions are expected across the terminals throughout
the period. Vcsh -shra are possible across tist tisx tjsj
terminals through 20 21z, which may result in brief MVFR
conditions. A few -shra are also possible across tjmz between 20
16z-22z. Winds will continue from the e-ene around 10 kts
through 20 13z, increasing to 15-20 kts with higher gusts,
especially near shra, afterwards through 20 22z.

Marine...

fresh to locally strong trade winds will create rough seas across
most of the local waters. Seas will range between 5 and 7 feet
across the local waters increasing at 6 to 8 feet by Thursday.

Small craft advisories are in effect for the caribbean and
atlantic offshore waters as well as across the local passages.

Hazardous conditions will diminish over the weekend but some areas
will persist with seas of 7 feet through early next week.

Preliminary point temps pops
Sju 83 73 86 75 40 20 20 40
stt 84 73 85 74 40 20 20 40

Sju watches warnings advisories
Pr... Small craft advisory from noon to 6 pm ast Thursday for
southwest.

Vi... None.

Am... Small craft advisory from noon to 6 pm ast Thursday for coastal
waters of southwestern puerto rico out 10 nm.

Small craft advisory until 8 pm ast Friday for anegada passage
southward to 17n-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 8 am ast Friday for coastal waters of
southern puerto rico out 10 nm.

Small craft advisory until 2 pm ast Friday for coastal waters of
southern usvi vieques and eastern puerto rico out 10 nm.

Small craft advisory from 6 am Thursday to 2 pm ast Friday for
coastal waters of northern puerto rico out 10 nm-coastal
waters of northern usvi and culebra out 10 nm.

Short term... Ds
long term... .99


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MGZP4 - 9759394 - Mayaguez, PR 0 mi39 min 79°F 81°F1018 hPa
PTRP4 11 mi24 min NE 11 G 17 80°F
41115 - Rincon, Puerto Rico (181) 13 mi39 min 80°F3 ft
MGIP4 - 9759110 - Magueyes Islands, PR 18 mi39 min SSE 8.9 G 14 81°F 79°F1018.3 hPa
AROP4 - 9757809 - Arecibo, PR 30 mi39 min NE 12 G 18
42085 - Southeast of Ponce, PR 41 mi69 min E 16 G 19 80°F1017.6 hPa (-1.7)
MISP4 - 9759938 - Mona Island, PR 43 mi39 min 74°F 80°F1019 hPa

Wind History for Mayaguez, PR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Aquadilla, Rafael Hernandez Airport, PR19 mi79 minE 14 G 2010.00 miOvercast75°F0°F%1020.3 hPa

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Tide / Current Tables for Mayaguez, Puerto Rico
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Mayaguez
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Wed -- 02:42 AM AST     -0.39 feet Low Tide
Wed -- 06:53 AM AST     Sunrise
Wed -- 07:45 AM AST     Moonset
Wed -- 09:25 AM AST     1.69 feet High Tide
Wed -- 03:51 PM AST     0.13 feet Low Tide
Wed -- 06:31 PM AST     Sunset
Wed -- 07:50 PM AST     Moonrise
Wed -- 09:18 PM AST     1.24 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.2-0.1-0.3-0.4-0.20.10.61.11.51.71.71.51.10.80.40.20.10.20.50.81.11.21.21

Tide / Current Tables for Puerto Real, Puerto Rico
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Puerto Real
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Wed -- 02:37 AM AST     -0.28 feet Low Tide
Wed -- 06:53 AM AST     Sunrise
Wed -- 07:45 AM AST     Moonset
Wed -- 09:22 AM AST     1.23 feet High Tide
Wed -- 03:46 PM AST     0.09 feet Low Tide
Wed -- 06:31 PM AST     Sunset
Wed -- 07:50 PM AST     Moonrise
Wed -- 09:15 PM AST     0.90 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.1-0.1-0.3-0.3-0.10.10.50.81.11.21.21.10.80.50.30.10.10.20.40.60.80.90.90.7

Weather Map and Satellite Images
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GOES Local Image of    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 (13,3,4,5)
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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.