Thursday, March21, 2019 L-36.com


Marine Weather and Tides
Mayag�ez, 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 6:30AMSunset 6:40PM Thursday March 21, 2019 5:39 PM AST (21:39 UTC) Moonrise 7:32PMMoonset 7:06AM Illumination 99% Phase: Waning Gibbous; Moon at 16 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- 346 Pm Ast Thu Mar 21 2019
Tonight..East winds 5 to 10 knots. Seas 1 to 3 feet. Dominant period 10 seconds. Isolated showers.
Friday..Northeast winds 5 to 10 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds.
Friday night..East winds 5 to 10 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Scattered showers.
Saturday..East winds 5 to 10 knots backing north in the afternoon. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 8 seconds.
Saturday night..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 11 seconds. Northeast swell around 4 feet after midnight.
Sunday..Northeast winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Northwest swell around 4 feet. Scattered showers.
Monday..Southeast winds 5 to 10 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Scattered showers.
Tuesday..Southeast winds 5 to 10 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Isolated showers.
AMZ700 346 Pm Ast Thu Mar 21 2019
Synopsis for puerto rico and the uS. Virgin islands waters... A surface high pressure across the northeast atlantic and a weak surface low pressure over the western atlantic will continue to promote a gentle to moderate east to southeast wind flow through Friday. Seas are forecast to build early next week as a new surface high pressure develops over the north central atlantic increasing the trade winds across the northeast caribbean.


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 212046
afdsju
area forecast discussion
national weather service san juan pr
446 pm ast Thu mar 21 2019

Synopsis A low-level trade wind perturbation is expected to
affect the area tonight into the day on Friday, increasing the
shower activity. A drier air mass is expected for Saturday,
resulting in mostly fair weather conditions. Surface high pressure
across the northeast atlantic will continue to maintain an east
to southeast wind flow into the upcoming weekend.

Short term Tonight through Saturday...

a tranquil weather day was observed across the forecast area as a
drier than normal air mass moved overhead and limited the shower
activity significantly. Conditions, however, are about to change
somewhat tonight into the day on Friday as a low-level trade wind
perturbation will move overhead. This will increase the
precipitable water values to between 1.3 and 1.4 inches, which is
around the normal for this time of the year. Therefore, an
increase in scattered shower activity is expected across portions
of the usvi later this evening and then across portions of
eastern and southeastern pr during the overnight into the morning
hours of Friday. Then during the afternoon hours of Friday,
showers are expected to develop across the northwest quadrant of
pr, where activity could be somewhat enhanced due to daytime
heating and sea breeze convergence. Showers in the form of
streamers are also possible across the san juan metro area during
the afternoon hours given that the low-level flow is expected to
be unidirectional from the southeast. At this moment, the main
hazard with the shower activity is expected to be ponding of water
on roadways and in low-lying and poor drainage areas.

Conditions will then improve significantly by Friday night into
the day on Saturday as once again a drier than normal air mass
moves overhead with precipitable water values to drop below 1
inch. This promises to promote mostly fair weather conditions
across the area. A few showers, however, cannot be ruled out
across eastern areas during the overnight and early morning hours
followed by a few showers across western pr during the afternoon
hours. Overall, a pleasant weather day is expected for Saturday.

Long term Sunday through Friday...

issued 448 am ast Thu mar 21 2019
an induced trough is forecast to move across the local caribbean
waters on Sunday. As a result, the moisture will surge across the
islands supporting scattered showers at times. At that time, the
upper level support is weak therefore no significant rainfall
accumulations are anticipated late in the weekend. GFS ensemble
mean show a front stalling north of the islands and a surface high
pressure moving over the north central atlantic on Monday. The
induced southeasterly flow will promote additional moisture
transport across the u.S. Virgin islands and puerto rico. Under
this pattern, wet trades winds will bring patches of moisture
from time to time resulting in a few rounds of scattered showers
across the local islands early next week. Then, a potent low
pressure system moves over the western atlantic by midweek pushing
its associated front closer to the region the second part of the
week. All in all, next week looks wetter and it is coinciding
with favorable mjo conditions across the basin.

Aviation MainlyVFR conditions will persist across all terminals.

Shra and increased cloud cover will bring sct occasional bkn
between fl020-040 and vcsh resulting in brief MVFR conditions at
tncm tkpk through at least 22 00z. A few vcsh possible across
tjbq and tjmz through 21 23z. Sct occasional bkn between fl025-040
during this period. E-se winds between 10-15 knots with sea
breeze variations through 21 22z, becoming light and variable
afterwards.

Marine Marine conditions will continue to remain in fairly good
shape with seas expected to range between 2 and 5 feet with east
to southeast winds up to 15 knots during the next few days. An
increase in seas is expected by late Sunday into early next week
as an increase in the easterly trade winds is expected due to a
surface high pressure moving over the western atlantic.

For beachgoers, a moderate risk of rip currents is expected for
the north-facing beaches of puerto rico, culebra, saint thomas,
and cramer park in saint croix and across portions of the north
and south-facing beaches of vieques through Friday. Elsewhere,
the rip current risk will be low.

Preliminary point temps pops
Sju 89 74 86 74 20 40 40 10
stt 85 75 84 73 30 40 20 20

Sju watches warnings advisories
Pr... None.

Vi... None.

Am... None.

Short term... Gl
long term... .From previous discussion


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MGZP4 - 9759394 - Mayaguez, PR 0 mi46 min 82°F 82°F1013.3 hPa
PTRP4 11 mi30 min N 2.9 G 6 81°F
41115 - Rincon, Puerto Rico (181) 13 mi40 min 81°F3 ft
MGIP4 - 9759110 - Magueyes Islands, PR 18 mi46 min SSE 7 G 11 81°F 81°F1013.8 hPa
AROP4 - 9757809 - Arecibo, PR 30 mi46 min NE 7 G 12
42085 - Southeast of Ponce, PR 41 mi100 min ESE 9.7 G 12 80°F1012.7 hPa (-2.1)
MISP4 - 9759938 - Mona Island, PR 43 mi46 min 82°F 83°F1013.6 hPa

Wind History for Mayaguez, PR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Aquadilla, Rafael Hernandez Airport, PR19 mi1.8 hrsNNE 610.00 miFair82°F66°F58%1014.6 hPa

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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Thu -- 02:40 AM AST     -0.17 feet Low Tide
Thu -- 06:32 AM AST     Sunrise
Thu -- 07:05 AM AST     Moonset
Thu -- 08:53 AM AST     1.47 feet High Tide
Thu -- 03:09 PM AST     0.01 feet Low Tide
Thu -- 06:39 PM AST     Sunset
Thu -- 07:31 PM AST     Moonrise
Thu -- 09:10 PM AST     1.51 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40.1-0.1-0.200.30.71.11.41.51.41.10.70.40.100.10.30.71.11.41.51.41.2

Tide / Current Tables for Puerto Real, Puerto Rico
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Puerto Real
Click for Map
Thu -- 02:35 AM AST     -0.12 feet Low Tide
Thu -- 06:32 AM AST     Sunrise
Thu -- 07:05 AM AST     Moonset
Thu -- 08:50 AM AST     1.07 feet High Tide
Thu -- 03:04 PM AST     0.01 feet Low Tide
Thu -- 06:39 PM AST     Sunset
Thu -- 07:32 PM AST     Moonrise
Thu -- 09:07 PM AST     1.10 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.30-0.1-0.100.30.60.811.110.80.50.30.100.10.30.50.811.110.9

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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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for (17,4,5,8)
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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.