Friday, January19, 2018 L-36.com


Marine Weather and Tides
Las Croabas, PR

Version 3.4
What's New / NOTES
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.
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.

Sunrise 6:56AMSunset 6:10PM Friday January 19, 2018 7:28 PM AST (23:28 UTC) Moonrise 8:41AMMoonset 8:26PM Illumination 10% Phase: Waxing Crescent; Moon at 3 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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AMZ725 Coastal Waters Of Southern Usvi Vieques And Eastern Puerto Rico Out 10 Nm- 457 Pm Ast Fri Jan 19 2018
Tonight..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 10 seconds. East swell around 4 feet. Isolated showers.
Saturday..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 10 seconds. East swell around 4 feet. Scattered showers.
Saturday night..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 11 seconds. East swell 4 to 5 feet. Isolated showers.
Sunday..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. Isolated showers.
Sunday night..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. Isolated showers.
Monday..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 10 seconds. Scattered showers.
Tuesday..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 8 seconds. Scattered showers.
Wednesday..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 8 seconds. Scattered showers.
AMZ700 457 Pm Ast Fri Jan 19 2018
Synopsis for puerto rico and the uS. Virgin islands waters... A frontal boundary will remain stalled north of the region through at least Monday. As a result moderate easterly trade winds will continue across the region. Moderate to fresh trades are forecast to return Sunday as another surface high pressure is forecast to build north of the region and increase the local pressure gradient. A long dominant period northwest to north swell will reach the atlantic waters and local passages by Saturday.

7 Day Forecast for Marine Location Near Las Croabas, PR
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location: 18.34, -65.57     debug


Area Discussion for - San Juan, PR
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Fxca62 tjsj 192037
afdsju
area forecast discussion
national weather service san juan pr
437 pm ast Fri jan 19 2018

Synopsis
A surface high pressure will drift into the western atlantic
through the weekend, tightening the local pressure gradient. As a
result breezy trade winds will continue to bring clouds and
showers across the islands from time to time.

Short term Tonight through Monday...

showers continue over eastern puerto rico from gurabo to bayamon
and within 5 miles of the airport tjsj. Radar shows some amounts
have exceeded one half inch over san juan and guaynabo. Flash
flooding along roads and urban areas were reported across these
municipalities. Other cells developed from orocovis to rincon and
the area of convection is expected to diminish around sunset.

Trade winds dominate the synoptic picture at this time. High
pressure from the alabama coast eastward into the western atlantic
will continue north of the area through the period and trade
winds will increase somewhat during the period. At 700 mb a high
pressure just north of the area will drag some of the moisture
associated with the front about 200 miles north into the area, but
it will move west and out of the area by Saturday morning. This
will lead to decreasing showers late Saturday and Sunday.

Moisture begins to return on Monday and eastern slopes of puerto
rico will be most affected most with scattered showers in the u.S.

Virgin islands. Upper levels will continue to be dominated by the
ridge that continues to be reinforced in the westerly flow. This
will keep it nearby first to the east then to the west and back
again.

Long term Monday through Saturday...

model guidance suggest a seasonal weather pattern for puerto rico
and the u.S. Virgin islands, as a mid to upper level ridge holds
through at least Monday. Then, as a short wave trough moves north
of the islands the upper level ridge is forecast to erodes.

Although no significant upper level dynamic will be in place, low
level moisture will induce shower development across the windward
sections each night and morning. Also, the available moisture will
combine with daytime heating, orographic effects and sea breeze
variations to produce showers over some locations of the interior
and western pr each afternoon.

Aviation
Areas of mtn obscurations may be seen across western pr,
but otherwiseVFR conds are expected to prevail. Any MVFR conds in
the leeward islands should disappear before 19 18z. Mtn obscurations
in the luquillo range should end by 20 04z. Sct shra have developed
across WRN pr but end by 20 00z. Sfc winds east 10-15 kt. Maximum
winds genly 30-40kt btwn fl380-500, but 19 12z sounding showed 50 kt
at fl450.

Marine
Mariner can expect seas between 4 and 6 feet across the atlantic
and mona passage overnight. Elsewhere, seas at 5 feet or less are
expected. The winds will be from the east at 10 to 15 knots,
except across the caribbean and mona passage where are expected
between 15 and 20 knots.

A long dominant period northwest to north swell will reach the
atlantic waters and local passages by Saturday. As a result, small
craft advisories will be in effect across most of the local
waters.

Preliminary point temps pops
Sju 84 73 85 74 30 30 30 20
stt 83 74 84 74 20 30 40 20

Sju watches warnings advisories
Pr... Vi... None.

Am... Small craft advisory from 8 am Saturday to 2 pm ast Sunday for
coastal waters of northern puerto rico out 10 nm.

Small craft advisory from 8 am Saturday to 8 am ast Monday for
atlantic waters of puerto rico and usvi from 10 nm to 19.5n.

Short term... Ws
long term... .Cam
aviation... Ws


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
41056 8 mi59 min E 12 G 14 80°F 1016.2 hPa
CLBP4 - 9752235 - Culebra, PR 14 mi41 min 82°F1016.7 hPa
YABP4 - 9754228 - Yabucoa Harbor, PR 24 mi59 min 80°F
41053 - San Juan, PR 30 mi59 min E 14 G 16 80°F 1015.4 hPa
SJNP4 - 9755371 - San Juan, PR 30 mi47 min 82°F1016.6 hPa
41052 - South of St. John, Virgin Islands 43 mi59 min E 12 G 12 80°F 1014.9 hPa
JOXP4 - Jobos Bay Reserve, Puerto Rico 44 mi164 min E 8.9 81°F 1016 hPa73°F
LAMV3 45 mi41 min 82°F

Wind History for Fajardo, PR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Juan, Luis Munoz Marin International Airport, PR24 mi33 minE 1110.00 miPartly Cloudy79°F75°F88%1016.5 hPa

Wind History from JSJ (wind in knots)
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Last 24hrE3E5E3E3CalmCalmCalmCalmCalmCalmS3CalmCalm4E7E11E13
G18
NE11NE11E11SW5E8E12E11
1 day agoE5E4SE8SE3CalmE3CalmCalmCalmCalmCalmCalmCalmSE3E6NE11NE10NE11E11E13E14NE13E11E9
2 days agoSE5SE5E8S4SW3SW3SE5CalmCalmCalmCalmCalmS4E5SE6E9E13NE11NE13E13E16E13E10E6

Tide / Current Tables for Playa de Fajardo, Puerto Rico
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Playa de Fajardo
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Fri -- 03:34 AM AST     -0.10 feet Low Tide
Fri -- 06:57 AM AST     Sunrise
Fri -- 08:40 AM AST     Moonrise
Fri -- 10:48 AM AST     1.47 feet High Tide
Fri -- 05:18 PM AST     0.35 feet Low Tide
Fri -- 06:09 PM AST     Sunset
Fri -- 08:26 PM AST     Moonset
Fri -- 10:17 PM AST     0.83 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.50.30.1-0.1-0.100.30.611.21.41.51.41.20.90.60.40.40.40.50.60.80.80.8

Tide / Current Tables for Vieques Passage, Puerto Rico Current
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Vieques Passage
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Fri -- 12:57 AM AST     0.49 knots Max Flood
Fri -- 03:59 AM AST     -0.00 knots Slack
Fri -- 06:34 AM AST     -0.37 knots Max Ebb
Fri -- 06:57 AM AST     Sunrise
Fri -- 08:40 AM AST     Moonrise
Fri -- 09:06 AM AST     0.00 knots Slack
Fri -- 12:27 PM AST     0.60 knots Max Flood
Fri -- 03:28 PM AST     -0.00 knots Slack
Fri -- 06:09 PM AST     Sunset
Fri -- 07:03 PM AST     -0.82 knots Max Ebb
Fri -- 08:26 PM AST     Moonset
Fri -- 10:42 PM AST     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.40.50.40.2-0-0.2-0.3-0.4-0.2-00.20.50.60.60.40.2-0.2-0.5-0.7-0.8-0.8-0.5-0.20.1

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 (18,4,5,8)
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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.