Saturday, April21, 2018 L-36.com


Marine Weather and Tides
Dorado, PR

Version 3.4
What's New / NOTES
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.

Sunrise 6:02AMSunset 6:45PM Saturday April 21, 2018 5:49 AM AST (09:49 UTC) Moonrise 11:01AMMoonset 12:00AM Illumination 35% Phase: Waxing Crescent; Moon at 6 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- 459 Am Ast Sat Apr 21 2018
.small craft should exercise caution..|
Today..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 11 seconds. Northeast swell around 4 feet. Scattered showers.
Tonight..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 11 seconds. Northeast swell around 4 feet. Isolated showers.
Sunday..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 11 seconds. Northeast swell around 4 feet. Isolated showers.
Sunday night..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 11 seconds. Northeast swell around 4 feet. Isolated showers.
Monday..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 8 seconds. Isolated showers.
Tuesday..East winds 15 to 20 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated showers.
Wednesday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated showers.
AMZ700 459 Am Ast Sat Apr 21 2018
Synopsis for puerto rico and the uS. Virgin islands waters... A surface high pressure system will continue to produce a moderate to locally fresh wind flow across the regional waters through early next week. Seas will gradually subside through the weekend.

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 210900
afdsju
area forecast discussion
national weather service san juan pr
500 am ast Sat apr 21 2018

Synopsis At the surface, high pressure system will continue to
dominate the local region through the weekend. A patch of low
level moisture will move across the region today. A sharp increase
in low level moisture is expected early next week. Upper level trough
will dominates the western atlantic Monday through Wednesday next
week.

Short term Short term... Today through Sunday...

a patch of moisture is expected to move in today, the rainfall has
already made an impact with numerous showers affecting eastern pr
during the overnight hours. This moisture will combine with the
local effects this afternoon and help develop scattered to locally
numerous showers with isolated thunderstorms over the interior into
nw-pr, with showers and thunderstorms possibly streaming off of the
luquillo mountain range into the san juan metro area. On Sunday,
drier air is expected in and wind flow may shift a bit to the ene,
which may cause afternoon convection across W and sw-pr with
isolated showers elsewhere. Both Saturday and Sunday, we may observe
isolated to scattered brief showers across the local waters,
usvi, and eastern pr in the nighttime and early morning hours.

Monday may be a bit more active if the guidance were to verify. We
have additional moisture moving in again and the wind flow becomes
easterly. There is also an upper trough that may be digging just
west of the local islands, increasing instability and also
increasing the chances for thunderstorms over the local islands,
especially over several sectors in puerto rico when the moisture,
diurnal heating and instability all combine on Monday afternoon.

Isolated to scattered showers can be expected for the usvi during
the day with showers possibly streaming off the islands.

Long term Monday through Saturday...

for Monday into Tuesday, a sharp increase in low level moisture
is forecast to occur, with best moisture and favorable upper level
atmospheric conditions expected on Tuesday. As a result, an
increase in showers and thunderstorms are expected by early next
week. By late in the forecast period, drier air mass is expected
to encompass the region from the east.

Aviation Vfr conds in the morning hours across the local
terminals. Shra shra expected this afternoon may cause moments of
MVFR across tjsj, tjmz, and tjbq after 21 16z. Tempo groups were
left out due to exact location uncertainty since guidance suggests
that the activity will be mostly in the vicinity. Winds will be from
the east at around 15kt and gusty.

Marine Seas will slowly diminish and most areas will come below
7 feet this morning. However, seas at 7 feet are expected to
continue across the offshore atlantic waters through this evening.

Elsewhere, small craft should exercise caution.

Preliminary point temps pops
Sju 87 75 85 75 40 20 10 40
stt 86 75 87 75 20 20 20 40

Sju watches warnings advisories
Pr... High rip current risk until 6 am ast early this morning for
culebra-southeast-vieques.

Vi... High rip current risk through late tonight for st croix.

Am... High rip current risk until 6 am ast early this morning for
coastal waters of southern puerto rico out 10 nm.

Small craft advisory until 6 pm ast this evening for atlantic
waters of puerto rico and usvi from 10 nm to 19.5n.

Short term... Ja
long term... .Fc


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SJNP4 - 9755371 - San Juan, PR 9 mi49 min 74°F 80°F1016.9 hPa (-0.4)
41053 - San Juan, PR 10 mi49 min ESE 3.9 G 16 77°F 79°F5 ft1016 hPa (-0.4)
AROP4 - 9757809 - Arecibo, PR 22 mi49 min SE 7 G 8.9
JOXP4 - Jobos Bay Reserve, Puerto Rico 36 mi64 min N 2.9 72°F 1017 hPa70°F
YABP4 - 9754228 - Yabucoa Harbor, PR 38 mi49 min 78°F
41056 46 mi49 min E 14 G 16 79°F 4 ft1016.4 hPa (-0.4)

Wind History for San Juan, PR
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Juan, Luis Munoz Marin International Airport, PR16 mi1.9 hrsN 010.00 miMostly Cloudy75°F75°F100%1016.7 hPa

Wind History from JSJ (wind in knots)
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Last 24hrE6E7E16E13E17
G22
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G20
E19NE22E19
G27
E16E15E14E12E8E6E6E12E4S5SE3CalmCalmSW3
1 day agoSE5S3E8E12
G17
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G22
E19SE10E13
G21
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E18E17E14E7E10E10E7E8E7E10E9E6E5SE3
2 days agoCalmCalmCalmE7E8E9E13NE15E19
G23
E12E13E10E8E5E4E3SE3SE4SE3E7E4CalmE5SE3

Tide / Current Tables for San Juan, Puerto Rico
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San Juan
Click for Map
Sat -- 01:21 AM AST     1.69 feet High Tide
Sat -- 06:03 AM AST     Sunrise
Sat -- 08:05 AM AST     0.29 feet Low Tide
Sat -- 11:00 AM AST     Moonrise
Sat -- 12:58 PM AST     0.82 feet High Tide
Sat -- 06:43 PM AST     Sunset
Sat -- 07:04 PM AST     -0.17 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.51.71.71.51.20.90.60.40.30.30.50.60.80.80.80.60.40.1-0.1-0.2-0.10.10.50.8

Tide / Current Tables for San Juan, La Puntilla, San Juan Bay, Puerto Rico
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San Juan
Click for Map
Sat -- 01:21 AM AST     1.68 feet High Tide
Sat -- 06:03 AM AST     Sunrise
Sat -- 08:06 AM AST     0.28 feet Low Tide
Sat -- 11:00 AM AST     Moonrise
Sat -- 12:58 PM AST     0.80 feet High Tide
Sat -- 06:43 PM AST     Sunset
Sat -- 07:03 PM AST     -0.18 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.51.71.61.51.20.90.60.40.30.30.50.60.80.80.70.60.30.1-0.1-0.2-0.10.10.40.8

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.
target = "new">Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for (5,6,7,8)
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Ground Weather Radar Station Puerto Rico,Virgin Islands
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weather_mapweather_map weather_map

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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.