Wednesday, March22, 2017 L-36.com


Marine Weather and Tides
Emajagua, 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 6:23AMSunset 6:36PM Wednesday March 22, 2017 8:25 PM AST (00:25 UTC) Moonrise 2:11AMMoonset 1:45PM Illumination 22% Phase: Waning Crescent; Moon at 25 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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AMZ735 Coastal Waters Of Southern Puerto Rico Out 10 Nm- 346 Pm Ast Wed Mar 22 2017
Tonight..East winds 5 to 10 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Southeast swell around 4 feet. Scattered showers.
Thursday..Southeast winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Southeast swell around 4 feet. Scattered showers.
Thursday night..East winds 5 to 10 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated showers.
Friday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Scattered showers.
Friday night..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Scattered showers.
Saturday..Southeast winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 10 seconds. Southeast swell around 4 feet. Scattered showers.
Sunday..Southeast winds 5 to 10 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 8 seconds. Scattered showers.
Monday..Southeast winds 5 to 10 knots. Seas 1 to 3 feet. Dominant period 7 seconds. Scattered showers.
AMZ700 346 Pm Ast Wed Mar 22 2017
Synopsis for puerto rico and the uS. Virgin islands waters... A light to moderate east southeast wind flow will continue across the local waters. Winds will become more southeast later tonight. A northerly swell will continue to affect the offshore atlantic waters through tonight. A larger northerly swell expected to impact the atlantic waters and local passage by late Friday and this will maintain hazardous seas through the weekend.

7 Day Forecast for Marine Location Near Emajagua, PR
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location: 18, -65.88     debug


Area Discussion for - San Juan, PR
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Fxca62 tjsj 221845
afdsju
area forecast discussion
national weather service san juan pr
245 pm ast Wed mar 22 2017

Synopsis A nearly stationary frontal boundary extending from
the north-central atlantic southwest to the windward passage
between hispaniola and cuba. An atlantic high pressure ridge
slowly moving east.

Short term Tonight through Friday morning... Widely scattered
showers currently affecting the local area should diminish once
diurnal heating diminishes. Surface flow will continue from
southeast tonight and Thursday but will become more southerly and
lighter Thursday night and Friday as a strong low pressure system well
north over the northern atlantic pulls a trough north from the
eastern caribbean and over the area. This southeast to south flow
will bring increased moisture through the end of the work week. A
weak frontal boundary will hover to the north to enhance this
situation. A deepening upper level trough over cuba and jet north
of us will hold favorable divergence aloft. This will maintain
partly to mostly cloudy conditions with scattered showers.

Although heavy rains may occur in northwest puerto rico during the
afternoons, rains in general will be more probable on Friday with
isolated urban and small stream flooding possible.

Long term Friday night through day 8/issued 455 am ast Wed mar
22 2017...

expect frequent periods of late evening and overnight passing
showers along portions of the north and east coastal sections of
the islands,followed by afternoon convection with enhanced shower
activity particularly across the interior and northern half of
puerto rico each day. The potential for periods of locally heavy
rainfall with minor urban and small stream flooding in isolated
areas will remain high across portions of the islands especially
for the northern and eastern half of puerto rico.

Long wave trough across the western atlantic is still forecast to
deepen and extend southwards into the west and central caribbean
thru the end of the week . This will increase instability over the
northeastern caribbean leading to enhanced upper level divergence
across the region. The subtropical jet and associated maxima will
continue to strengthen and to round the base of the upper trough which
will lift northeastward to just north of the region. The inverted
surface trough is to continue to amplify and lift northwards across
the region with a weak surface low now forecast to develop just north
hispaniola by Monday. As a result, a moist south to southeasterly
flow should persist through Friday and into the weekend. All model
guidance support a very moist and unstable pattern across the region
for the next several days with good tropical moisture advection. Moisture
convergence along a frontal shear line, along with the lingering surface
trough and instability aloft will all favor high potential for enhanced
convection across the region at least through Tuesday of next week.

Winds are forecast to become more easterly by Wednesday as the surface
trough weakens and the upper trough fills and lifts north of the
region. This should then support a gradual decrease in moisture
transport. However, moisture along the old frontal shearline
should return across the region to allow for nocturnal shower
activity, and diurnally induced afternoon convection which should
be focused over the interior and west sections of pr.

Aviation Mountains obscurations with isolated areas of MVFR conds
with CIGS 020-030 are expected in central and northern pr affecting
mainly tjbq/tjmz. ElsewhereVFR conds will prevail. Winds sfc to
fl050 SE 10 to 15 kts. Maximum winds wsw 75 knots at fl400.

Marine Seas up to 7 feet are expected across the offshore
atlantic waters tonight. Seas will diminish by Thursday morning
however a larger northerly swell is expected to impact the
atlantic waters and local passages by late Friday with
deteriorating conditions though the weekend.

Preliminary point temps/pops
Sju 75 87 77 85 / 20 40 50 50
stt 75 85 74 84 / 30 30 50 50

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

Vi... High rip current risk through late tonight for st.Thomas... St.

John... And adjacent islands.

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

Small craft advisory until 2 am ast Thursday for atlantic waters
of puerto rico and usvi from 10 nm to 19.5n.

Short term... Rgh
long term... .99


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
YABP4 - 9754228 - Yabucoa Harbor, PR 5 mi38 min E 8.9 G 11
JOXP4 - Jobos Bay Reserve, Puerto Rico 18 mi101 min E 5.1 80°F 1015 hPa72°F
ESPP4 - 9752695 - Esperanza, PR 23 mi38 min SE 9.9 G 11 80°F 82°F1015 hPa
VQSP4 - 9752619 - Isabel Segunda, Vieques, PR 25 mi38 min Calm G 2.9 79°F
FRDP4 - 9753216 - Fajardo, PR 27 mi38 min SE 5.1 G 9.9 80°F 73°F
41056 29 mi56 min ESE 12 G 16 80°F 1014 hPa
SJNP4 - 9755371 - San Juan, PR 34 mi38 min SE 8 G 11
42085 - Southeast of Ponce, PR 35 mi86 min SE 14 G 18 79°F 80°F1013.6 hPa (+1.1)
41053 - San Juan, PR 35 mi56 min ESE 9.7 G 12 81°F 1013.9 hPa
CLBP4 - 9752235 - Culebra, PR 37 mi38 min 80°F 81°F1015.1 hPa

Wind History for Yabucoa Harbor, PR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Juan, Luis Munoz Marin International Airport, PR30 mi30 minE 710.00 miPartly Cloudy79°F73°F85%1014.6 hPa

Wind History from JSJ (wind in knots)
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Last 24hrE3S3CalmCalmCalmCalmCalmCalmSE3SE3SE5E6SE5E6SE56
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1 day ago3SW3CalmCalmCalmSW3CalmCalmCalm3CalmCalmSW4N65SE7NE7E7NE12NE10E15E13E7E5
2 days agoE3E3CalmCalmCalmCalmE4CalmCalmCalmCalmCalmCalm3N9NE8E8SW6SW44N6N6NE6SW6

Tide / Current Tables for Puerto Maunabo, Puerto Rico
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Puerto Maunabo
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Wed -- 02:11 AM AST     Moonrise
Wed -- 06:04 AM AST     0.45 feet High Tide
Wed -- 06:25 AM AST     Sunrise
Wed -- 01:44 PM AST     Moonset
Wed -- 06:34 PM AST     Sunset
Wed -- 07:06 PM AST     -0.08 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.10.10.20.30.40.40.40.40.40.40.30.20.20.10-0-0-0.1-0.1-0.1-0.1-0.1-0-0

Tide / Current Tables for Vieques Passage, Puerto Rico Current
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Vieques Passage
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Wed -- 02:10 AM AST     Moonrise
Wed -- 02:37 AM AST     0.00 knots Slack
Wed -- 06:04 AM AST     0.57 knots Max Flood
Wed -- 06:24 AM AST     Sunrise
Wed -- 09:14 AM AST     -0.00 knots Slack
Wed -- 12:46 PM AST     -0.68 knots Max Ebb
Wed -- 01:43 PM AST     Moonset
Wed -- 04:29 PM AST     0.00 knots Slack
Wed -- 06:33 PM AST     Sunset
Wed -- 07:08 PM AST     0.39 knots Max Flood
Wed -- 09:59 PM AST     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.4-0.3-0.10.10.30.50.60.50.30.1-0.2-0.5-0.6-0.7-0.6-0.4-0.10.10.30.40.30.2-0-0.2

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 (20,4,5,8)
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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.