Monday, August19, 2019 L-36.com


Marine Weather and Tides
El Combate, PR

Version 3.4
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7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:15AMSunset 6:59PM Monday August 19, 2019 10:51 PM AST (02:51 UTC) Moonrise 9:47PMMoonset 9:26AM Illumination 80% Phase: Waning Gibbous; Moon at 19 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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AMZ741 Mona Passage Southward To 17n- 859 Pm Ast Mon Aug 19 2019
Rest of tonight..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Scattered showers.
Tuesday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated showers.
Tuesday night..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 evening. Numerous showers through the night.
Wednesday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Scattered showers.
Wednesday 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.
Thursday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated showers.
Friday..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 10 seconds. Scattered showers.
Saturday..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 859 Pm Ast Mon Aug 19 2019
Synopsis for puerto rico and the uS. Virgin islands waters... A surface high pressure centered across the north central atlantic will maintain moderate to fresh east winds across the local waters. Moisture associated with a tropical wave will continue to move across the area, with scattered showers and Thunderstorms through at least Tuesday. Thereafter, isolated showers across our regional waters are expected for the rest of the week. Seas will be up to 5 feet for the the next several days.


7 Day Forecast for Marine Location Near El Combate, PR
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location: 18.09, -67.94     debug


Area Discussion for - San Juan, PR
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Fxca62 tjsj 200117
afdsju
area forecast discussion
national weather service san juan pr
917 pm ast Mon aug 19 2019

Update
Skies remain variably cloudy across the region during the evening
hours as deep layered moisture associated with convective debris
from a departing tropical wave, lingered across the region. Most
of the cloud cover however was mid to high level clouds with a
few low level clouds and passing showers affecting regional waters
and north and east coastal sections of the islands. Rainfall
accumulations at this time were however minimal. Expect another
surge of moisture now crossing the northern leeward islands to
enter and cross the forecast area later tonight and during the
early morning hours. This will bring another round of showers
activity with possibly a few isolated thunderstorms to the
coastal waters and parts of the islands. Rainfall may again
moderate to locally heavy at times.

Recent tjsj 20 00z upper air sounding was still very moist with
precipitable near 2.00 inches. So expect this moist airmass to
linger at least through Tuesday. No significant changes made to
the inherited short term package at this time.

Aviation update PrevailingVFR at all terminals. Brief MVFR due
to shra isold tsra en route btw islands and ovr regional waters.

Sct-bkn lyrs nr fl025... Fl050... Bkn-ovc nr fl140... Fl200. Isold
tops abv fl250 nr tsra. Sfc wnds lgt vrb bcmg fm E 10-15 kt aft
20 14z. No other chgs attm.

Marine update No change to previous marine discussion. Outside
of passing showers and isolated thunderstorms activity expected
over portions of the local waters during the overnight and early
morning hours, winds and seas will be 10 to 15 knots and 5 feet or
less during the period.

Prev discussion issued 148 pm ast Mon aug 19 2019
synopsis...

deep tropical moisture will pool over the islands through at
least Tuesday. Weather conditions will improve somewhat by
Wednesday and through the end of the work-week, but patches of
moisture will bring advective showers at times. A weak tropical
wave is forecast by the upcoming weekend.

Short term... Tonight through Wednesday...

latest goes-16 and tjsj sounding observed deep tropical moisture
with values above 2 inches of tpw. Thunderstorms developed north
of the cordillera central including the sj metro area. Most of
this activity is expected to last through this evening.

A tropical wave lifting northward will promote moist and unstable
weather conditions keeping a high potential for showers and
thunderstorms across the archipelago. The local waters of the
u.S. Virgin islands and puerto rico could expect shower and
thunderstorm formation overnight, some of them could move inland
at time.

Winds are forecast to return from the east to northeast by
Tuesday shifting afternoon convection over the west and southwest
portions of puerto rico. Passing showers will continue to affect
the u.S. Virgin islands at time.

Weather conditions will improve somewhat by Wednesday. However,
patches of low-level moisture will bring overnight and morning
passing showers at times. Induced afternoon convection should not
be ruled out over the interior and western sections.

Long term... Thursday through Monday...

a migrating surface high pressure moving westward across the
north central atlantic will maintain a moderate to locally fresh
east to southeast wind flow across the region. Relatively tranquil
weather conditions are forecast on Thursday and continuing through
Friday evening. However, patches of low-level moisture will bring showers
to the us virgin islands and puerto rico during the overnight and
early morning hours. Then, lingering moisture supported by
diurnal heating and local effects will trigger locally induced
showers and thunderstorms along the interior and over portions of
northwestern puerto rico each afternoon. By late Friday night
through Sunday morning, a wind surge ahead of a tropical wave and
south of a developing surface high will transport an elongated
area of low-level moisture across the region, increasing the
potential for shower and thunderstorm activity. Weather conditions
are to briefly improve Sunday through Monday, but moisture
advection from a passing tropical wave will once again increase
the potential for shower and thunderstorm activity by Monday
afternoon.

Aviation...

vcts are expected to continue until 19 22z for tjsj tjmz tjbq tist.

Tempo conditions due to thunderstorms over tjbq are anticipated
until 19 21z. Vcsh are expected for tisx tncm tkpk until 19 22z.

It will be breezy within thunderstorms, but winds are expected to
diminish tonight, coming generally out of the east at 5 to 10
knots.

Marine...

mariners can expect seas up to 5 feet and winds around 15 knots
and should exercise caution due to thunderstorms, where marine
conditions could turn hazardous quickly. Favorable environmental
conditions for thunderstorm formation will continue through at
least Tuesday. Brief gusty winds and torrential rainfall is
possible with this activity.

Small craft advisories are not expected through much of the
forecast cycle.

Preliminary point temps pops
Sju 79 87 78 89 50 40 30 30
stt 79 88 78 88 60 60 30 30

Sju watches warnings advisories
Pr... None.

Vi... None.

Am... None.

Short term... Ram
long term... .Mb


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MISP4 - 9759938 - Mona Island, PR 0 mi52 min 80°F 83°F1017.4 hPa (+1.5)
41115 - Rincon, Puerto Rico (181) 40 mi52 min 85°F1 ft
PTRP4 41 mi27 min E 5.1 G 6 78°F
MGZP4 - 9759394 - Mayaguez, PR 42 mi58 min 80°F 85°F1017.4 hPa
MGIP4 - 9759110 - Magueyes Islands, PR 48 mi58 min ESE 2.9 G 6 84°F 1017.3 hPa

Wind History for Mayaguez, PR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure

Link to 5 minute data for TJMZ

Wind History from JMZ (wind in knots)
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Last 24hr----------------------------------------E6E5E8E9
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Tide / Current Tables for Puerto Real, Puerto Rico
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Puerto Real
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Mon -- 05:07 AM AST     0.34 feet Low Tide
Mon -- 06:11 AM AST     Sunrise
Mon -- 09:23 AM AST     Moonset
Mon -- 10:58 AM AST     0.95 feet High Tide
Mon -- 05:03 PM AST     0.36 feet Low Tide
Mon -- 06:52 PM AST     Sunset
Mon -- 09:43 PM AST     Moonrise
Mon -- 11:08 PM AST     1.02 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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10.90.70.50.40.30.40.50.60.80.90.90.90.80.70.50.40.40.40.50.70.811

Tide / Current Tables for Mayaguez, Puerto Rico
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Mayaguez
Click for Map
Mon -- 05:12 AM AST     0.47 feet Low Tide
Mon -- 06:11 AM AST     Sunrise
Mon -- 09:23 AM AST     Moonset
Mon -- 11:01 AM AST     1.31 feet High Tide
Mon -- 05:08 PM AST     0.50 feet Low Tide
Mon -- 06:52 PM AST     Sunset
Mon -- 09:42 PM AST     Moonrise
Mon -- 11:11 PM AST     1.41 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.41.210.70.60.50.50.70.91.11.21.31.31.10.90.70.60.50.50.70.91.11.31.4

Weather Map and Satellite Images
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wmap_A
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 (22,6,7,8)
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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.