Monday, August21, 2017

Marine Weather and Tides
Aguadilla, PR

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
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.

Sunrise 6:23AMSunset 7:10PM Monday August 21, 2017 12:36 AM AST (04:36 UTC) Moonrise 6:11AMMoonset 7:19PM Illumination 1% Phase: Waning Crescent; Moon at 29 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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7 Day Forecast for Marine Location Near Aguadilla, PR
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location: 21.66, -71.76     debug

Area Discussion for - San Juan, PR
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Fxca62 tjsj 210054
area forecast discussion
national weather service san juan pr
854 pm ast Sun aug 20 2017

Update Moisture provided by a surface low to the northwest of
puerto rico, invest 92l, in combination combination with daytime
heating and local effects induce the development of numerous
showers and scattered thunderstorms across puerto rico, the usvi
as well as across the surrounding waters during the afternoon and
this evening. Several flood advisories, flash flood warnings,
river flood warnings and special weather statement were issued
for numerous municipalities and river across puerto rico.

Several marine weather statements were also issued due to frequent
lightnings across the surrounding waters. Flood waters are expected
to slowly subside as no additional heavy rainfall is expected
overnight. However, some of the rivers and streams across parts
of northwest and southeast puerto rico will continue to be
affected by excessive runoff into the overnight hours.

Latest model guidance indicated that a relatively drier air mass
will move across the forecast area early Monday morning. However,
the lingering moisture in combination with daytime heating and
local effects will be sufficient to produce a round of showers and
thunderstorms across interior and western puerto rico Monday

Aviation -ra will continue to affect some of the leewards,
usvi and tjsj TAF sites late this evening but are expected to
diminish overnight. After 21 16z, some convection is expected to
develop again across interior and western pr to produce shra tsra
that will affect tjbq, tjmz and possible tjsj. E to ese winds at
10 to 15 knots with higher gusts expected to diminish at 10 knots
or less overnight, increasing again by 21 13z.

Marine Hazardous marine conditions will continue across the
offshore atlantic waters, where mariners can expect seas up to 7
feet. Elsewhere winds of 15 to 20 knots and seas at 6 feet or less
can be expected.

Prev discussion issued 634 pm ast Sun aug 20 2017
synopsis... Copious amounts of tropical moisture associated with
an elongated area of low pressure lifting north and west across
the area today, along with instability aloft supported the
development of showers and strong thunderstorms across the region.

Urban and flash flooding with dangerous lightning and gusty winds
of 30 mph or greater was observed across much of the forecast
area. This activity is expected to continue at least until evening
hours, then gradually diminish over land areas by late evening
and overnight. Flood waters are expected to slowly subside as no
additional heavy rainfall is expected. However,some of the rivers
and streams across parts of northwest and southeast puerto rico
will continue to be affected by excessive runoff into the late
evening hours.

Short term... Late tonight through Monday, expect a gradual
drying trend as the elongated trough tropical wave lifts north and
west of the region. However still expect trailing moisture and
instability aloft to support late night and early morning showers
with isolated thunderstorms over the coastal waters and parts of
the north and east coastal sections of the islands. This will be
followed by local and diurnally induced convection over parts of
the interior and west sections of puerto rico, as well as over
parts of the san juan metro area where isolated showers will
remain possible. Mostly isolated showers is forecast mainly on the
west end of the usvi. On Tuesday another surge of moisture in the
moderate easterly trade winds is forecast to move across the
region to again support early morning showers and afternoon
convection over part of the islands.

Long term... Wednesday through Sunday... The next tropical wave
is forecast to move across the region Wednesday with a gradual
improvement on Thursday and Friday followed by another tropical
wave forecast to enter the eastern caribbean Saturday through
Sunday. In the upper levels... A north-south oriented tutt and
associated low will shift westward across the region and north
of the area by Thursday to maintain fairly light wind aloft and
only marginally unstable conditions aloft. Therefore local and
diurnal effect will should be the main driving force for daily
convection during the latter part of the work week. Current model
guidance still does not suggest any tropical cyclones east of the
forecast area through Sunday.

Aviation... Shra tsra expected to affect tjsj tjbq tjmz at least
until 20 23z as well as the vcty of tist tisx tjps. This activity is
associated with a surface low pressure a couple of hundred miles to
the north of puerto rico. Shra expected to slowly diminish
overnight. E to ese winds at 10 to 15 knots with higher gusts
in near shra tsra dropping at 10 knots or less after 20 23z.

Marine... Hazardous marine conditions are expected to continue
mainly across the offshore atlantic waters where mariners can
expect seas up to 7 feet. Elsewhere winds of 15 to 20 knots and
seas at 6 feet or less can be expected. Small craft operators should
exercise caution due to thunderstorms with areas of heavy rainfall
during the over night hours.Sudden waterspouts will also possible
across the atlantic and local passages.

Preliminary point temps pops
Sju 79 89 79 88 40 40 40 30
stt 81 90 81 90 50 50 50 30

Sju watches warnings advisories
Pr... None.

Vi... None.

Am... Small craft advisory until 2 pm ast Monday for atlantic waters
of puerto rico and usvi from 10 nm to 19.5n.

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

Weather Reporting Stations
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Airport Reports
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Tide / Current Tables for Abrahams Bay, Mayaguana Island, Bahamas
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Abrahams Bay
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Mon -- 02:16 AM EDT     0.65 feet Low Tide
Mon -- 06:15 AM EDT     Moonrise
Mon -- 06:31 AM EDT     Sunrise
Mon -- 08:21 AM EDT     3.25 feet High Tide
Mon -- 02:22 PM EDT     0.66 feet Low Tide
Mon -- 02:31 PM EDT     New Moon
Mon -- 07:18 PM EDT     Sunset
Mon -- 07:24 PM EDT     Moonset
Mon -- 08:44 PM EDT     3.56 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Tide / Current Tables for
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Weather Map and Satellite Images
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Weather Map
IR Satellite Image from GEOS

GOES Local Image of Puerto Rico    EDIT

Wind Forecast for (0,6,7,8)
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Ground Weather Radar Station Puerto Rico,Virgin Islands
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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 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 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.