Wednesday, October16, 2019 L-36.com


Marine Weather and Tides
Cata�o, PR

Version 3.4
NOTICE
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
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 6:17AMSunset 6:02PM Wednesday October 16, 2019 8:23 AM AST (12:23 UTC) Moonrise 8:11PMMoonset 8:30AM Illumination 92% Phase: Waning Gibbous; Moon at 18 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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AMZ712 Coastal Waters Of Northern Puerto Rico Out 10 Nm- 456 Am Ast Wed Oct 16 2019
Today..East winds 5 to 10 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 8 seconds. Scattered showers and isolated Thunderstorms.
Tonight..Southeast winds 5 to 10 knots. Seas 1 to 3 feet. Dominant period 8 seconds. Isolated Thunderstorms in the evening. Numerous showers through the night.
Thursday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 8 seconds. Isolated showers.
Thursday night..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 8 seconds. Isolated showers through the night.
Friday..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 8 seconds. Isolated Thunderstorms. Numerous showers.
Saturday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 11 seconds. Isolated Thunderstorms. Scattered showers.
Sunday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Isolated Thunderstorms. Scattered showers.
AMZ700 456 Am Ast Wed Oct 16 2019
Synopsis for puerto rico and the uS. Virgin islands waters... There remains enhanced moisture over the local waters behind a tropical wave now located to our west. This moisture will continue to aid in the development of showers and isolated Thunderstorms in the area. Seas will remain relatively tranquil, with wave heights up to around 4 feet anticipated. Winds will pick up out of the east on Thursday to around 10 to 15 knots under the influence of a surface high pressure system to the north. Friday will see the arrival of renewed moisture from a tropical wave pushing into the area.


7 Day Forecast for Marine Location Near Cata?o, PR
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location: 18.46, -66.12     debug


Area Discussion for - San Juan, PR
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Fxca62 tjsj 160908
afdsju
area forecast discussion
national weather service san juan pr
508 am ast Wed oct 16 2019

Synopsis
Similar conditions to yesterday are expected again today; showers
and isolated thunderstorms are likely, especially during the
afternoon, and especially in western and interior puerto rico, as
well as the san juan metro area. Potential impacts include a risk
of urban and small stream flooding, as well as mudslides in steep
terrain, with rains falling on already saturated soils. A
slightly drier airmass is expected to push through the area
tonight into tomorrow, but then to be followed quickly by a
tropical wave on Friday bringing renewed moisture, which is
forecast to last through the weekend.

Short term Today through Friday...

light winds and near normal moisture will continue across the region
today. The tutt over the local area has strengthened and will be
over the local area today, maintaining good instability for the next
few days. However, forecast soundings are suggesting that the
overall instability for today will be similar to that recently
observed over the local area, which means that good convection could
occur over the local area, especially over puerto rico this
afternoon. For Thursday, the instability decreases, and so does the
moisture, possibly due to some saharan dust moving in, but then
instability and moisture increases significantly on Friday,
particularly for the afternoon hours, as a tropical wave approaches
the local area.

The forecast for today is for mostly scattered showers with isolated
thunderstorms across the local waters, usvi, and eastern pr during
the rest of the morning. Afternoon thunderstorm activity over land
is expected across most of pr, including the san juan metro, but the
south coastal sections have the lowest chance of significant
rainfall. The pattern today is still not too different to that
observed yesterday, in which we observed plenty of rain, for that
reason, at least some urban and small stream flooding as well as
rapid river rises are expected this afternoon. Given the saturated
soils across many areas, mud slides in areas of steep terrain and
localized flash flooding will not be ruled out.

For Thursday, the shower activity overnight should be isolated to
scattered as drier air moves in over the area, then some afternoon
convection is possible across central and western pr, but the
coverage and duration is expected to be more limited compared to
what we expect today. Then on Friday, the shower activity will
increase once again, especially for the afternoon hours as the
tropical wave approaches.

Long term Saturday through Friday...

the tropical wave and its enhanced moisture will push through the
area into the weekend, with another small surge of moisture Sunday
afternoon anticipated. This will aid in the development of showers
due to orographic forcings and daytime heating Saturday and Sunday,
especially during the afternoons in western and interior puerto
rico.

Monday through Thursday, pockets of enhanced moisture will make
their way over the area from time to time. This increased moisture
is anticipated to aid in the development of showers and isolated
thunderstorms, especially over western and interior puerto rico
during the afternoons. Other portions of the local islands as well
as the surrounding waters will likely also see some of the
afternoon shower activity as well. During this time, a cutoff
upper- level low is expected to develop to the north northwest of
puerto rico early in the week, then move generally to the south by
midweek, passing over or near the local islands. The current
expected trajectory of this feature takes it over or near western
portions of the region. In this scenario, there is the potential
for divergence aloft associated with this low to aid in convective
development over our forecast area Tuesday and or Wednesday.

As we look towards the end of next week, increased moisture is
likely to be seen again, with another tropical wave forecast to make
its way into the area on Friday.

Aviation
Shra activity expected today through the forecast period across the
local flying area. This will cause at least vcsh across most of the
local terminals for the next 24 hours. Tsra is expected over many
sectors of pr today, for that reason vcts across all of the
terminals in pr is likely after 16 16z. Tempo MVFR conds at tjmz and
tjbq are possible. Local winds will be easterly at 10kt or less,
with sea breeze variations.

Marine
Relatively tranquil marine conditions will persist today,
with wave heights up to around 4 feet expected. Winds today will be
up to 10 knots, increasing tomorrow to around 10-15 knots out of the
east. Northern beaches of culebra and mainland puerto rico have a
continuing low to moderate risk of rip current today.

Preliminary point temps pops
Sju 89 77 89 78 60 60 30 60
stt 88 77 88 80 50 50 20 60

Sju watches warnings advisories
Pr... None.

Vi... None.

Am... None.

Short term... Ja
long term... .Crs


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SJNP4 - 9755371 - San Juan, PR 0 mi53 min S 2.9 G 5.1 79°F 87°F1014.9 hPa
41053 - San Juan, PR 1 mi83 min S 1.9 G 3.9 81°F 86°F3 ft1013.7 hPa (+0.8)
AROP4 - 9757809 - Arecibo, PR 31 mi59 min SE 7 G 8.9
YABP4 - 9754228 - Yabucoa Harbor, PR 32 mi53 min 77°F 74°F
JOXP4 - Jobos Bay Reserve, Puerto Rico 35 mi98 min Calm 76°F 1015 hPa72°F
41056 37 mi83 min SSW 1.9 G 1.9 83°F 86°F2 ft1013.5 hPa (+0.9)
ESPP4 - 9752695 - Esperanza, PR 43 mi53 min E 5.1 G 11 79°F 85°F1015.1 hPa
CLBP4 - 9752235 - Culebra, PR 45 mi53 min 81°F 87°F1014.8 hPa
42085 - Southeast of Ponce, PR 46 mi83 min N 7.8 G 9.7 81°F 86°F2 ft1013.5 hPa (+0.9)

Wind History for San Juan, PR
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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Tide / Current Tables for San Juan, La Puntilla, San Juan Bay, 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 Boca De Cangrejos, Isla Verde, San Juan, Puerto Rico
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Boca De Cangrejos
Click for Map
Wed -- 04:14 AM AST     0.06 feet Low Tide
Wed -- 06:17 AM AST     Sunrise
Wed -- 08:29 AM AST     Moonset
Wed -- 11:10 AM AST     1.42 feet High Tide
Wed -- 05:40 PM AST     0.36 feet Low Tide
Wed -- 06:00 PM AST     Sunset
Wed -- 08:10 PM AST     Moonrise
Wed -- 10:43 PM AST     0.85 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.80.60.30.20.10.10.30.50.81.11.31.41.41.210.70.50.40.40.40.60.70.80.8

Weather Map
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wmap_A
GEOS 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 (8,2,3,4)
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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.