Thursday, April19, 2018 L-36.com


Marine Weather and Tides
Aguas Claras, 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 6:01AMSunset 6:41PM Thursday April 19, 2018 5:45 AM AST (09:45 UTC) Moonrise 9:04AMMoonset 10:26PM Illumination 17% Phase: Waxing Crescent; Moon at 4 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- 353 Am Ast Thu Apr 19 2018
.small craft should exercise caution...
Today..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 14 seconds. Northeast swell 4 to 5 feet. Scattered showers.
Tonight..East winds 10 to 15 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 13 seconds. East swell 4 to 5 feet. Isolated showers.
Friday..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 12 seconds. East swell 4 to 5 feet. Scattered showers.
Friday night..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 11 seconds. East swell around 4 feet. Scattered showers.
Saturday..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 11 seconds. East swell around 4 feet. Scattered showers.
Sunday..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 11 seconds. Southeast swell around 4 feet. Scattered showers.
Monday..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.
AMZ700 353 Am Ast Thu Apr 19 2018
Synopsis for puerto rico and the uS. Virgin islands waters... A moderate east to southeast wind flow will prevail today across the regional waters...becoming more easterly and locally fresh into the weekend. A long period northeast swell will move across the local waters on Thursday and slowly subside through Friday. Isolated Thunderstorms are expected on Thursday across portions of the local waters.

7 Day Forecast for Marine Location Near Aguas Claras, PR
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location: 18.23, -65.62     debug


Area Discussion for - San Juan, PR
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Fxca62 tjsj 190931
afdsju
area forecast discussion
national weather service san juan pr
531 am ast Thu apr 19 2018

Synopsis Short wave trough will enhance shower and thunderstorm
development today over portions of puerto rico. Drier air will
move quickly later this evening but a surge in moisture returns
once again on Friday and Saturday. Broad surface high pressure
will continue across the eastern atlantic through early next week
and another surface high will build north of the region by then.

A wind surge will keep moderate to fresh trades through Friday.

Short term Today through Saturday...

the weak trough tropical wave that brought showers and thunderstorms
to the local area Wednesday has moved to south of haiti. Drier air
is now moving into the leeward islands and will pass into the u.S.

Virgin islands by midday and onto puerto rico by mid afternoon.

Surface winds will also increase somewhat today as a wind surge
moves through. An approaching trough at upper levels will bring
divergence to puerto rico today and the u.S. Virgin islands later
this afternoon and evening. This will enhance the convection and
instability in puerto rico and another round of thunderstorms with
urban and small stream flooding will be likely. However, the
divergence aloft will be too late to help the u.S. Virgin islands,
since moisture will already have eroded considerably from the east
there. Drier air will move into the area tonight but will be quickly
followed by another area of moisture--especially at 850 mb, that
will spawn more showers on Friday and Saturday. Upper level support
for these showers will not be found, however, and an area of
convergence will fight convection over the caribbean sea on
Saturday. Winds at the surface will become more easterly later
tonight and Friday and gain a little northerly component on
Saturday. This will make high temperatures on the north coast likely
the warmest of the last few days today with sea breezes on the north
coast more effective Friday and Saturday. Temperatures on the south
coast will likely warm several degrees on Friday and Saturday.

Long term Sunday through Thursday...

dry mid levels are expected on Sunday and this will limit shower
activity to the west and southwestern portions of pr due to a
northeasterly component on the steering winds. But, mostly sunny
to partly cloudy skies are expected to prevail. From Monday
through Thursday low level moisture will increase to 700mb and
favor the development of afternoon showers and thunderstorms
along the cordillera central and western puerto rico. Passing
trade wind showers will also increase across the usvi and eastern
portions of pr during the overnight and early morning hours.

Aviation Isold tsra shra will increase later today.VFR conds to
cont til arnd 18 16z xcp arnd tncm tkpk where ocnl MVFR CIGS are
psbl. Aft 16z areas of +shra iso-sct tsra will dvlp mainly across
wrn and interior pr with mtn obscurations. Sfc winds ese 10-15 kt
with sea land breeze variations. MAX winds W 50-60 kt btwn fl350-430
thru 20 06z.

Marine A long period northeast swell will result in life
threatening rip currents across the north, east and southeast
facing beaches of puerto rico, culebra, vieques and st. Croix
through at least Friday. High surf conditions due to breaking
waves up to 10 feet are expected across the eastern beaches of
st. Croix. Small craft advisories are in effect for the offshore
waters and passages due to seas up to 7 feet. East winds will
continue at 15 to 20 knots across the region.

Preliminary point temps pops
Sju 87 75 88 75 40 20 30 50
stt 86 75 86 76 20 10 30 30

Sju watches warnings advisories
Pr... High rip current risk through Friday afternoon for northeast.

High rip current risk through late tonight for central interior-
ponce and vicinity-southeast.

High rip current risk through late Friday night for culebra-
north central-northwest-san juan and vicinity-vieques-
western interior.

Vi... High rip current risk through late Friday night for st croix.

High surf advisory until 6 am ast Friday for st croix.

Am... Small craft advisory from 8 pm this evening to 6 pm ast
Friday for caribbean waters of puerto rico from 10 nm to 17n-
mona passage southward to 17n.

Small craft advisory until 6 pm ast Friday for anegada passage
southward to 17n-atlantic waters of puerto rico and usvi
from 10 nm to 19.5n.

Short term... Ws
long term... .Ds


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
41056 9 mi46 min ESE 18 G 21 80°F 4 ft1017.7 hPa (-0.0)
YABP4 - 9754228 - Yabucoa Harbor, PR 17 mi46 min 80°F
CLBP4 - 9752235 - Culebra, PR 18 mi46 min 78°F 81°F1017.7 hPa (-0.0)
41053 - San Juan, PR 30 mi46 min SE 7.8 G 12 78°F 80°F4 ft1016.9 hPa (-0.0)
SJNP4 - 9755371 - San Juan, PR 31 mi46 min 78°F 80°F1017.8 hPa (-0.0)
JOXP4 - Jobos Bay Reserve, Puerto Rico 37 mi61 min NE 4.1 78°F 1017 hPa71°F
41052 - South of St. John, Virgin Islands 45 mi46 min ESE 18 G 21 80°F 1016.6 hPa (-0.0)
LAMV3 48 mi46 min 79°F 80°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 mi50 minSSE 310.00 miA Few Clouds76°F73°F91%1017.7 hPa

Wind History from JSJ (wind in knots)
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Last 24hrCalmCalmCalmE7E8E9E13NE15E19
G23
E12E13E10E8E5E4E3SE3SE4SE3E7E4CalmE5SE3
1 day agoE3S3E6E6E10SW5NE13NE4E7E11E14E4E10E5CalmE4E4CalmCalmCalmCalmCalmCalmCalm
2 days agoSE34E8E9E14E13NE16E16E19
G22
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G27
NE18
G25
NE19
G23
E16E12E11E9E9E12SE4SE5CalmS3CalmCalm

Tide / Current Tables for Roosevelt Roads, Puerto Rico
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Roosevelt Roads
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Thu -- 06:02 AM AST     Sunrise
Thu -- 06:27 AM AST     0.15 feet Low Tide
Thu -- 09:04 AM AST     Moonrise
Thu -- 11:11 AM AST     0.56 feet High Tide
Thu -- 05:32 PM AST     -0.13 feet Low Tide
Thu -- 06:40 PM AST     Sunset
Thu -- 10:25 PM AST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.110.80.60.40.20.20.20.30.40.50.60.50.40.30.1-0-0.1-0.1-00.20.50.71

Tide / Current Tables for Vieques Passage, Puerto Rico Current
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Vieques Passage
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Thu -- 01:03 AM AST     0.85 knots Max Flood
Thu -- 04:15 AM AST     -0.00 knots Slack
Thu -- 06:02 AM AST     Sunrise
Thu -- 07:44 AM AST     -0.97 knots Max Ebb
Thu -- 09:04 AM AST     Moonrise
Thu -- 11:25 AM AST     0.00 knots Slack
Thu -- 02:04 PM AST     0.55 knots Max Flood
Thu -- 04:56 PM AST     -0.00 knots Slack
Thu -- 06:40 PM AST     Sunset
Thu -- 07:44 PM AST     -0.53 knots Max Ebb
Thu -- 10:24 PM AST     0.00 knots Slack
Thu -- 10:25 PM AST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.70.80.80.50.1-0.3-0.7-0.9-1-0.8-0.5-0.20.20.50.50.50.3-0-0.3-0.5-0.5-0.4-0.10.2

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 (5,6,7,8)
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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.