Thursday, October18, 2018 L-36.com


Marine Weather and Tides
Isabela, 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 6:22AMSunset 6:04PM Thursday October 18, 2018 2:31 PM AST (18:31 UTC) Moonrise 2:23PMMoonset 1:08AM Illumination 68% Phase: Waxing Gibbous; Moon at 9 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- 1042 Am Ast Thu Oct 18 2018
.small craft should exercise caution...
Rest of today..Northeast winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 7 seconds. Isolated showers.
Tonight..Northeast 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.
Friday..Northeast winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Isolated showers.
Friday night..Northeast winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Isolated showers through the night.
Saturday..Northeast winds 15 to 20 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 11 seconds. North swell around 4 feet. Isolated showers.
Sunday..Northeast winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. North swell around 4 feet. Isolated showers.
Monday..Northeast winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 10 seconds. Isolated showers.
AMZ700 1042 Am Ast Thu Oct 18 2018
Synopsis for puerto rico and the uS. Virgin islands waters... A surface high pressure ridge is forecast to build into the northeast caribbean from the central atlantic through early next week. This will promote a moderate to locally fresh east to northeast wind flow across the regional waters. Passing showers and breezy conditions will prevail today.


7 Day Forecast for Marine Location Near Isabela zona urbana, PR
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location: 18.5, -67.01     debug


Area Discussion for - San Juan, PR
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Fxca62 tjsj 181557
afdsju
area forecast discussion
national weather service san juan pr
1157 am ast Thu oct 18 2018

Update A much welcomed break from the clouds and the persistent
rain that has affected us for the past few weeks is expected today
and for the next couple of days. A few brief showers affected the
north and eastern sections of pr, as well as the usvi in the
morning hours. These showers have moved inland under a northeast
wind flow, but accumulations have been minimal, if any. Mostly
fair weather is expected today with the exception of scattered
but brief showers across the interior into southwestern sections
of pr. Some sea breeze convergence may occur across sw-pr,
increasing the chances of rain, but thunderstorms are not
expected. The usvi should observe fair weather with brief moments
of light showers, if that.

Aviation Vfr conds expected through the forecast period with
vcsh as brief showers move through. Winds will be from the ene-ne
with sea breeze variations at around 15kt with higher gusts.

Winds will decrease slightly after 19 00z, but still from the ene-
ne.

Marine Small craft advisory continues through 2pm ast today for
the offshore waters. Moderate risk of rip currents for most of the
local beaches. High risk of rip currents for nw-pr.

Prev discussion issued 440 am ast Thu oct 18 2018
synopsis... Mid to upper level ridge will dominate the weather
conditions through next week. Moderate to fresh northeast winds
will prevail for the next several days. Trade wind showers will
continue to move at times over the regional waters and into
portions of the usvi and north east pr. Diurnally induced
afternoon showers are expected mainly to develop over
southwestern pr.

Short term Today through Saturday...

partly cloudy skies prevailed across the forecast area overnight and
early this morning with frequent passing showers observed across the
northern usvi, eastern puerto rico as well as the surrounding waters.

However, rainfall accumulations associated with these showers were
minimal. Winds were from the east at 10 mph or less with coastal
temperatures in the mid to upper 70s.

Mid level ridge across the western atlantic is expected to extent
across the northern caribbean isles and hold through at least the
upcoming weekend. This feature will erode available moisture as soon
as today with pw values near or below the normal range. At lower
levels, a moderate to fresh east northeast wind flow will continue
to prevail through the forecast period. A tropical wave in the
vicinity of the mona passage, will continue to move west and away
from the local region throughout the day.

Under ridge pattern and eroding moisture, expect fair weather
conditions across most of the local islands. However, locally
induced showers are still possible across western areas of puerto
rico each afternoon. East northeast winds will continue to promote
maximum temperatures in the mid to upper 80s along coastal areas.

The chance for isolated thunderstorms will return on Saturday
afternoon.

Long term... Sunday through Friday...

a mid to upper level ridge across the western and central
caribbean will continue to promote drier air aloft through the
long term period. Upper level trough and induced perturbations are
expected to remain to the east northeast of the region. Under a
northeasterly wind flow, passing trade wind showers are expected
to continue across the usvi and across the northeastern sections
of pr through next week. Followed by limited afternoon convection
over the southwestern quadrant of pr. A short wave trough is
forecast to move over the area on Thursday, this should enhance
afternoon shower and thunderstorm activity over the cordillera
central. Normal to below normal temperatures are forecast to
continue during the long term period. Moderate to fresh northeast
trades are expected to prevail through midweek, becoming light to
gentle during the second part of the workweek.

Aviation...VFR conds are expected to prevail at all TAF sites
with a few -shra in and around the leeward and usvi terminals as
well as jsj in the morning. Aft 18 16z vcsh likely at jmz. Ene
winds at around 15 knots with some sea breeze variations.

Marine... A small craft advisory is in effect for the offshore
atlantic and caribbean waters, as well across the mona passage
through this afternoon due to seas up to 7 feet. Elsewhere, small
crafts should exercise caution due to seas up to 6 feet and east
to northeast winds up to 20 knots. There is a high rip current
risk for the northwest coast of puerto rico. Especially across the
beaches of isabela.

Preliminary point temps pops
Sju 87 77 86 77 40 20 40 40
stt 88 78 88 78 20 20 40 40

Sju watches warnings advisories
Pr... High rip current risk through late tonight for northwest-western
interior.

Vi... None.

Am... Small craft advisory until 2 pm ast this afternoon for 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.

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


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PTRP4 16 mi22 min NE 12 G 18 88°F
AROP4 - 9757809 - Arecibo, PR 16 mi32 min NE 11 G 16
41115 - Rincon, Puerto Rico (181) 17 mi32 min 84°F4 ft
MGZP4 - 9759394 - Mayaguez, PR 21 mi32 min 89°F 84°F1013 hPa (-2.1)
MGIP4 - 9759110 - Magueyes Islands, PR 37 mi32 min SE 1.9 G 8 84°F 83°F1013.1 hPa (-2.2)
SJNP4 - 9755371 - San Juan, PR 47 mi32 min NE 9.9 G 15 84°F 84°F1014.2 hPa (-1.9)
41053 - San Juan, PR 48 mi32 min ENE 14 G 16 83°F 84°F5 ft1013.2 hPa (-2.0)

Wind History for Arecibo, PR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Aquadilla, Rafael Hernandez Airport, PR6 mi42 minE 18 G 2310.00 miFair and Breezy84°F0°F%1014.6 hPa

Wind History from JBQ (wind in knots)
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Last 24hrE18
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E8----------------CalmE5E9E15
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1 day agoE9
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2 days agoE17
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E12E6------------------E6E7E11E12E13
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G26
E15
G18

Tide / Current Tables for Aguadilla, Crashboat Beach, Puerto Rico
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Mayaguez, Puerto Rico
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Mayaguez
Click for Map
Thu -- 01:09 AM AST     Moonset
Thu -- 03:03 AM AST     1.09 feet High Tide
Thu -- 06:23 AM AST     Sunrise
Thu -- 09:11 AM AST     0.45 feet Low Tide
Thu -- 02:23 PM AST     Moonrise
Thu -- 04:08 PM AST     1.60 feet High Tide
Thu -- 06:04 PM AST     Sunset
Thu -- 10:53 PM AST     0.68 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.80.911.11.110.80.60.50.50.50.60.81.11.31.51.61.61.41.210.80.70.7

Weather Map and Satellite Images
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wmap_A
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 (14,3,4,5)
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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.