Wednesday, July17, 2019 L-36.com


Marine Weather and Tides
Mayag�ez, PR

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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 6:00AMSunset 7:08PM Wednesday July 17, 2019 4:20 AM AST (08:20 UTC) Moonrise 7:56PMMoonset 6:31AM Illumination 100% Phase: Full Moon; Moon at 15 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- 404 Am Ast Wed Jul 17 2019
Today..East winds 10 to 15 knots. Seas 1 to 3 feet. Dominant period 7 seconds. Showers through the day. Isolated Thunderstorms in the afternoon.
Tonight..East winds 5 to 10 knots. Seas 1 to 3 feet. Dominant period 7 seconds. Scattered 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 Thunderstorms in the afternoon.
Thursday night..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Scattered showers.
Friday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 8 seconds. Isolated Thunderstorms. Scattered showers.
Saturday..East winds 5 to 10 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Isolated Thunderstorms. Scattered showers.
Sunday..East winds 10 to 15 knots. Seas 2 feet or less. Dominant period 7 seconds. Isolated showers.
AMZ700 404 Am Ast Wed Jul 17 2019
Synopsis for puerto rico and the uS. Virgin islands waters... Winds will remain moderate to fresh through the rest of the week. A tropical wave is expected on Thursday into Friday, causing an increase in shower and Thunderstorm activity across the local waters. The next tropical wave is forecast to reach our local caribbean waters between Monday and Tuesday.


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 170803
afdsju
area forecast discussion
national weather service san juan pr
403 am ast Wed jul 17 2019

Synopsis A strong surface high pressure extending across the
north central atlantic will continue to dominate the local region
today and early Thursday. A tropical wave is forecast to move
across the local forecast area between Thursday and Friday.

Another tropical is expected to move across the caribbean waters
between Monday and Tuesday.

Short term Today through Friday...

a strong surface high pressure extending across the north central
atlantic will maintain a moderate to locally fresh easterly wind
flow across the region. Under this flow, patches of low level
moisture will enhance shower activity across the region. This
activity will focus over the waters and coastal areas during the
overnight and morning hours. Although a slight erosion of the
available moisture is expected by late morning into the early
afternoon hours, diurnal heating and local effects will still
support the development of showers and isolated thunderstorms during
the afternoon hours, particularly along the interior and over
portions of western puerto rico. Streamer-like showers affecting
eastern puerto rico and the san juan metropolitan area from el
yunque and the local islands cannot be ruled out. However, lack of
upper level support, limited moisture content,and a strong steering
flow will limit the effects this activity may have over these areas.

A slight increase in shower and thunderstorm activity is expected on
Thursday into Friday as the next tropical wave move across the
caribbean and supports moisture advection into the forecast area.

Model-estimated pw values are expected to hold around 1.60 to 2.00
inches by Thursday afternoon and continuing on Friday. Given the
somewhat expected favorable upper level conditions and high moisture
content, there is a better chance for more widespread convection to
develop over the forecast area. As a result, there will be a higher
potential for urban and small stream flooding.

Long term Saturday through Thursday...

lingering moisture will combine with diurnal heating and local
effects to cause more shower or thunderstorm development across
interior and western portions portions of puerto rico on
Saturday. A dryer airmass and saharan dust will prevail over the
local region from Saturday night through Monday. On Monday another
tropical wave would reach the local area but the increase in
moisture with this wave appears to be modest, as much of the
moisture appears to remain south of the local area.

Aviation Shra affecting usvi and northern pr terminals will
result in brief MVFR conditions through 17 08z. Thereafter, mainly
vfr conditions expected. Vcsh expected at leeward and usvi terminals
throughout the day. Afternoon convection will bring vcts vcsh to
tjmz tjps between 17 15-23z. This could result in brief MVFR
conditions. Light and variable winds through 17 14z, increasing to
15-20 knots with gusts up to 28 knots and turning from the east with
sea breeze variations.

Marine Passing showers will continue to move across the local
waters through mid morning. These showers could generate wind gust
of between 20 to 25 knots. Mariners should expect winds in the
range of between 10 to 15 knots. Stronger winds could be
experience near the coast due to sea breeze enhancement,
therefore small craft operators should exercise caution along the
northern and southern coast of puerto rico.

Preliminary point temps pops
Sju 89 78 89 79 40 20 20 40
stt 89 79 89 79 20 20 20 40

Sju watches warnings advisories
Pr... None.

Vi... None.

Am... None.

Short term... Icp
long term... .Em


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MGZP4 - 9759394 - Mayaguez, PR 0 mi56 min 76°F 85°F1017.4 hPa
PTRP4 11 mi25 min ESE 2.9 G 4.1 78°F
41115 - Rincon, Puerto Rico (181) 13 mi50 min 84°F2 ft
MGIP4 - 9759110 - Magueyes Islands, PR 18 mi56 min NE 1 G 1 78°F 84°F1017.2 hPa
AROP4 - 9757809 - Arecibo, PR 30 mi50 min E 11 G 14
42085 - Southeast of Ponce, PR 41 mi80 min E 19 G 25 83°F1015.7 hPa (-1.3)
MISP4 - 9759938 - Mona Island, PR 43 mi50 min 78°F 84°F1017.2 hPa

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

Wind History from JMZ (wind in knots)
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Last 24hr----------------------------------------E6E5E8E9
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Tide / Current Tables for Mayaguez, Puerto Rico
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Mayaguez
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Wed -- 03:49 AM AST     0.43 feet Low Tide
Wed -- 06:01 AM AST     Sunrise
Wed -- 06:31 AM AST     Moonset
Wed -- 08:12 AM AST     0.83 feet High Tide
Wed -- 02:30 PM AST     -0.13 feet Low Tide
Wed -- 07:07 PM AST     Sunset
Wed -- 07:55 PM AST     Moonrise
Wed -- 09:40 PM AST     1.65 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.10.80.60.50.40.50.60.80.80.80.70.50.20-0.1-0.100.30.71.11.41.61.61.5

Tide / Current Tables for Puerto Real, Puerto Rico
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Puerto Real
Click for Map
Wed -- 03:44 AM AST     0.31 feet Low Tide
Wed -- 06:01 AM AST     Sunrise
Wed -- 06:31 AM AST     Moonset
Wed -- 08:09 AM AST     0.60 feet High Tide
Wed -- 02:25 PM AST     -0.09 feet Low Tide
Wed -- 07:07 PM AST     Sunset
Wed -- 07:55 PM AST     Moonrise
Wed -- 09:37 PM AST     1.20 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.80.60.40.30.30.40.50.60.60.60.50.30.20-0.1-0.100.30.50.811.21.21.1

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 (4,6,7,8)
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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.