Sunday, April23, 2017 L-36.com


Marine Weather and Tides
Dorado, PR

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:01AMSunset 6:46PM Sunday April 23, 2017 3:44 PM AST (19:44 UTC) Moonrise 3:54AMMoonset 4:06PM Illumination 6% Phase: Waning Crescent; Moon at 27 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- 1102 Am Ast Sun Apr 23 2017
.small craft advisory in effect through Monday evening...
Rest of today..East winds 15 to 20 knots. Seas 6 to 8 feet with occasional seas up to 10 feet. Dominant period 12 seconds. Northeast swell 6 to 8 feet. Scattered showers.
Tonight..East winds 15 to 20 knots. Seas 6 to 8 feet with occasional seas up to 10 feet. Dominant period 11 seconds. Northeast swell 5 to 8 feet. Isolated showers.
Monday..East winds 15 to 20 knots. Seas 5 to 7 feet with occasional seas up to 9 feet. Dominant period 11 seconds. Northeast swell 5 to 7 feet. Numerous showers and isolated Thunderstorms.
Monday night..Southeast winds 10 to 15 knots. Seas 5 to 7 feet with occasional seas up to 9 feet. Dominant period 11 seconds. Northeast swell 4 to 6 feet. Isolated Thunderstorms in the evening. Scattered showers through the night.
Tuesday..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 10 seconds. Northeast swell 4 to 5 feet. Scattered showers and isolated Thunderstorms.
Wednesday..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 11 seconds. Scattered showers.
Thursday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 11 seconds. Isolated showers.
AMZ700 1102 Am Ast Sun Apr 23 2017
Synopsis for puerto rico and the uS. Virgin islands waters... A surface high pressure over the atlantic ocean well north of puerto rico will continue to drift eastward as surface low pressure enters the western atlantic late today through Monday. A north to northeast swell will continue to spread across the atlantic and local passages through Monday.

7 Day Forecast for Marine Location Near Dorado, PR
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location: 18.47, -66.29     debug


Area Discussion for - San Juan, PR
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Fxca62 tjsj 231435
afdsju
area forecast discussion
national weather service san juan pr
1035 am ast Sun apr 23 2017

Update No change to inherited forecast package at this time. Expect
mid to high level cloud cover to break out during the rest of the morning
hours. This will provide sufficient daytime heating and low level convergence
to support afternoon convection across portions of the islands,particularly
over the interior and northern half of pr. The prevailing wind flow
will continue to shift and become more southeasterly across the region
today but expect and even more southerly flow by Monday and Tuesday.

This will increase moisture advection/convergence as well as instability
aloft, as a mid to upper trough will approach the region and erode
the high pressure ridge.

Aviation update prevailingVFR at all TAF sites... Sct-bkn cld
lyrs fl025... Fl050..Fl080 ovr and en route btw islands with isold
-shra/shra mainly ovr coastal water durg the morning. Incr shra
with isold tsra psbl mainly ovr interior and w-nw pr fm 18z- 22z.

Brief MVFR conds psbl due to shra and low cig vcty tjbq,tjmz,
tjnr,tjsj. Sfc wnd fm SE 10 to 15 kts ocnl hir gusts. L/lvl wnds
fm SE veering w/hr and bcmg fm W abv fl200.

Marine Recent rincon and san juan buoy both suggest seas of 5-6
feet at 12-13 secs and winds 15-20 knots. Meanwhile offshore atl
buoy suggest seas continued near 7 feet at 13 secs. No change at
this time to previous marine discussion,as hazardous seas are expected
to continue during the rest of the day. High surf advisory will remain
in effect for the exposed atlantic coastline of puerto rico as isolated
breaking waves of up to 10 feet will remain possible along the north
coastal beaches. Small craft advisories will remain in effect for most
of the coastal waters.

A high risk of rip currents will continue for the northwest to
northeast beaches of puerto rico, culebra and vieques and for the
u.S. Virgin islands.

Prev discussion /issued 431 am ast Sun apr 23 2017/
synopsis... A ridge aloft will erode rapidly today as a short
wave trough swing across the region. A subtropical jet will hold
aloft through at least Monday. A polar trough is forecast to move
over the western atlantic ocean today, then will reach the
islands into mid-week. This trough will increase the instability
across the region today through at least Wednesday. The low level
southeast wind flow, will pull tropical moisture from the
caribbean waters over the region increasing the chance of showers
and thunderstorms today through at least mid week.

Short term... Today through Tuesday...

surface high pressure northeast of the area moves further into
the central atlantic today, winds will shift from the east-
southeast and trof pattern establishes across the western atlantic
into the central caribbean. Pwat values are forecast to increase
above 2 inches across much of the forecast area and trof pattern
will provide good divergence aloft to enhance the development of
thunderstorm with periods of heavy rainfall, mainly over northwest
pr today and spreading across the rest of the forecast area
through at least late Tuesday night.

Currently global models indicate high moisture content and favorable
conditions for scattered to numerous showers and thunderstorms
across the atlantic waters and over the northern usvi on Monday.

High res WRF model indicates best rainfall amounts this afternoon
across the northwestern coastal areas of pr. Other high res models
are indicating more widespread shower activity across the rest of
the interior and southeastern sections of pr later this evening and
increasing through Monday morning. Residents in pr and in the usvi
should monitor the progress of the weather conditions as periods of
frequent rainfall can result in urban and small stream flooding as
well as localized flash flooding with the heaviest showers.

Long term... Wednesday through Tuesday...

an upper level trough is expected to race over the northeast
caribbean as an associated surface low moves northeastward across
the canadian maritime provinces. As this happens weather
conditions will remain unstable across the local islands Wednesday
but pwat values are expected to decrease below 2.0 inches by that
time. Weather conditions will improve rapidly by Thursday and
thereafter as an upper level ridge build across the region. A
surface high pressure across the central will shift the local
winds more from the east late Wednesday and Thursday. Although the
instability is expected to decrease by the middle of the week,
this change in wind direction is expected to induce the
development of some showers and possible a couple of thunderstorms
each afternoon across interior and western sections of puerto
rico due to the combination of daytime heating and local effects.

A weak surface trough will increase slightly the chances of
showers across the region by the upcoming weekend.

Aviation... MainlyVFR conditions are expected to prevail
early in the forecast period across all terminals. Bkn-ovc CIGS abv
fl050 spreading from the west through the day. Afternoon shra/tsra
across the northwestern quadrant of pr can result in MVFR conds at
tjbq/tjmz. -ra/shra possible near tjsj due to shra streaming from
the eastern mountains. Ese winds below fl050 at 12-18 knots.

Cloudiness and shra increasing late in the forecast period into
Monday morning across the forecast area.

Marine... Seas will continue to deteriorate for the next couple
of days as a northerly swell continue to invade the local waters.

Seas will increase up to 8 feet with breaking waves reaching 10
feet of more across the atlantic waters. For this reason a high
surf advisory is in effect for the exposed atlantic coastline of
puerto rico. Small craft advisories will remain in effect for most
of the coastal waters. A high risk of rip currents potential
continues for the northwest to northeast beaches of puerto rico,
culebra and vieques and for the u.S. Virgin islands beaches.

Preliminary point temps/pops
Sju 86 75 87 76 / 30 40 50 40
stt 84 75 83 76 / 20 60 60 50

Sju watches/warnings/advisories
Pr... High rip current risk through Monday afternoon for culebra-north
central-northeast-northwest-san juan and vicinity-southeast-
western interior.

High surf advisory until 6 am ast Monday for culebra-north
central-northeast-northwest-san juan and vicinity-southeast-
western interior.

High rip current risk until 6 pm ast this evening for vieques.

High rip current risk through late tonight for mayaguez and
vicinity.

Vi... High rip current risk through Monday afternoon for
st.Thomas... St. John... And adjacent islands.

High rip current risk through late tonight for st croix.

Am... High rip current risk through Monday afternoon for coastal
waters of northern usvi and culebra out 10 nm-coastal
waters of southern usvi vieques and eastern puerto rico out
10 nm.

High surf advisory until 6 am ast Monday for coastal waters of
southern usvi vieques and eastern puerto rico out 10 nm.

Small craft advisory until 8 pm ast Monday for anegada passage
southward to 17n-atlantic waters of puerto rico and usvi
from 10 nm to 19.5n-caribbean waters of puerto rico from 10
nm to 17n-coastal waters of northern puerto rico out 10 nm-
coastal waters of northern usvi and culebra out 10 nm-mona
passage southward to 17n.

Small craft advisory until 8 am ast Monday for coastal waters of
northwestern puerto rico out 10 nm-coastal waters of
southern usvi vieques and eastern puerto rico out 10 nm.

Short term... Ram
long term... .Ram


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SJNP4 - 9755371 - San Juan, PR 9 mi44 min E 17 G 22 80°F 81°F1012.9 hPa (-1.9)
41053 - San Juan, PR 10 mi44 min E 18 G 23 80°F 80°F7 ft1012.3 hPa (-1.8)
AROP4 - 9757809 - Arecibo, PR 22 mi44 min E 14 G 24 82°F
JOXP4 - Jobos Bay Reserve, Puerto Rico 36 mi59 min E 9.9 82°F 1014 hPa72°F
FRDP4 - 9753216 - Fajardo, PR 36 mi44 min ESE 9.9 G 15 81°F 73°F
YABP4 - 9754228 - Yabucoa Harbor, PR 38 mi44 min E 13 G 19
MGZP4 - 9759394 - Mayaguez, PR 49 mi44 min NNW 2.9 G 5.1 83°F 83°F1011.9 hPa (-1.8)

Wind History for San Juan, PR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Juan, Luis Munoz Marin International Airport, PR16 mi48 minE 1710.00 miPartly Cloudy84°F73°F72%1013 hPa

Wind History from JSJ (wind in knots)
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Last 24hrE16
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E13E10E8E6E7CalmSE4SE3E3SE3CalmS3SE3E5E12E13
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1 day agoNE14E13E12E10E11E11E10E8E7E6E7E4SE3SE3SE3SE4E8E15E13E14NE13NE16
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2 days agoNE11E14
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E12NE10E8E8E9E9E7SE3CalmCalmCalmCalmS3CalmE5E8E15E13
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E16E15E17

Tide / Current Tables for San Juan, Puerto Rico
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San Juan
Click for Map
Sun -- 03:52 AM AST     Moonrise
Sun -- 06:01 AM AST     Sunrise
Sun -- 06:09 AM AST     1.33 feet High Tide
Sun -- 12:27 PM AST     0.14 feet Low Tide
Sun -- 04:05 PM AST     Moonset
Sun -- 06:43 PM AST     1.34 feet High Tide
Sun -- 06:43 PM AST     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.20.30.50.711.21.31.31.10.80.50.30.20.20.30.60.91.11.31.31.210.70.4

Tide / Current Tables for San Juan, La Puntilla, San Juan Bay, Puerto Rico
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San Juan
Click for Map
Sun -- 03:52 AM AST     Moonrise
Sun -- 06:01 AM AST     Sunrise
Sun -- 06:11 AM AST     1.32 feet High Tide
Sun -- 12:27 PM AST     0.12 feet Low Tide
Sun -- 04:05 PM AST     Moonset
Sun -- 06:43 PM AST     Sunset
Sun -- 06:43 PM AST     1.33 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.20.20.50.711.21.31.31.10.80.50.30.10.10.30.50.81.11.31.31.210.70.4

Weather Map and Satellite Images
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Weather Map
wmap_A
IR Satellite Image from GEOS
carb_satellite

GOES Local Image of Puerto Rico    EDIT
Geos

Wind Forecast for (15,3,4,5)
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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.