Saturday, April29, 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 5:55AMSunset 6:45PM Saturday April 29, 2017 11:13 PM AST (03:13 UTC) Moonrise 8:55AMMoonset 10:17PM 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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AMZ735 Coastal Waters Of Southern Puerto Rico Out 10 Nm- 854 Pm Ast Sat Apr 29 2017
.small craft should exercise caution...
Rest of tonight..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 7 seconds. Scattered showers.
Sunday..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 7 seconds. Isolated Thunderstorms through the day. Scattered showers in the afternoon.
Sunday night..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 7 seconds. Scattered showers and isolated Thunderstorms.
Monday..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 7 seconds. Scattered showers in the morning. Isolated Thunderstorms through the day.
Monday night..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Isolated Thunderstorms.
Tuesday..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Isolated Thunderstorms, then isolated showers.
Wednesday..East winds 15 to 20 knots. Seas 1 to 3 feet. Dominant period 7 seconds. Isolated showers.
Thursday..East winds 10 to 15 knots. Seas 1 to 3 feet. Dominant period 7 seconds. Isolated showers.
AMZ700 854 Pm Ast Sat Apr 29 2017
Synopsis for puerto rico and the uS. Virgin islands waters... Surface high pressure across the north central atlantic will continue to extend into the west and southwest atlantic through Sunday. The high pressure ridge will persist north of the region through the middle of next week to maintain moderate to locally fresh trade winds. By the latter part of the week, winds are to become light to moderate as the high will lift farther north across the atlantic. Hazardous wind driven seas and isolated Thunderstorms with areas of heavy rainfall will be likely across the local waters during the rest of 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 300032
afdsju
area forecast discussion
national weather service san juan pr
832 pm ast Sat apr 29 2017

Update Numerous showers and thunderstorms developed during the
afternoon hours mostly along and north of cordillera central as
well as across the eastern sections of puerto rico. Radar
estimated between 2 to 3 inches of rain in several spots across
southeast and western sections of puerto rico during the afternoon
hours. Several urban and small stream advisories were issued for
numerous municipalities along eastern and western puerto rico.

Showers and thunderstorms diminished after sunset, however light
to moderate activity persisted during the evening across the
northern half of the islands as well as across the surrounding
waters. Some showers will continue to affect the region overnight.

For Sunday, a similar weather pattern is expected with showers in
the morning across windward areas followed by numerous afternoon
showers and isolated thunderstorms across western and interior
sections of puerto rico. Weather conditions are expected to
improve slowly by Monday.

Aviation An upper level trough will continue to produce
periods of shra across the leewards and usvi TAF sites overnight
and Sunday morning. Shra/tsra development expected after 30/16z.

As a result periods of MVFR or even ifr conditions and mountain
obscurations expected at most of pr and usvi TAF sites. Low level
winds will continue mainly east at around 10 knots overnight,
increasing to 10-20 kts with higher gusts Sunday morning.

Marine Mariners should exercise caution across most of the
local waters due to seas between 4 and 6 feet and winds between 15
and 20 knots. Thunderstorm formation is likely across the local
waters through at least Sunday.

Prev discussion /issued 446 pm ast Sat apr 29 2017/
synopsis... The proximity of the tutt and abundant amounts of low
level moisture transport across the forecast area will maintain
moist and unstable weather conditions through the weekend and into
early next week. Conditions will gradually improve by the middle of
next week, with a more seasonable weather pattern expected to prevail
by the end of the next week and into the following weekend.

Short term... Tonight through Tuesday...

mostly cloudy and showery conditions prevailed across the entire
region today with showers and thunderstorms with areas of heavy rains
affecting several areas across puerto rico as well as the coastal waters
and u.S. Virgin islands.

For the rest of evening hours expect variably cloudy conditions
to continue but shower activity should diminish over most land
areas. However by late night and early morning expect another
round of showers and thunderstorms to develop across the regional
waters. This activity should then stream west and northwest and
affect the east and south coastal sections of puerto rico and the
rest of the islands including the u.S. Virgin islands. The very
moist and unstable environment, will aid in further development of
showers and thunderstorms across the cordillera central of puerto
rico early in the afternoon, with the activity expected to spread
across the western interior and northwest sections of puerto rico.

Periods of heavy rainfall will lead to urban and small stream flooding.

The upper level trough/tutt is expected to linger just north and west
of the region enhancing the development of showers and thunderstorms
across the local area until at least Tuesday. Low level moisture transport
is also expected to remain high through this period with very unstable
conditions aloft. As a result, periods of enhanced showers and thunderstorms
can be expected to develop each afternoon across the cordillera central
of puerto rico and portions of the u.S. Virgin islands.

Long term... Wednesday through Sunday...

tutt is expected to continue to linger north of the forecast area at
least until Wednesday. However as this feature continues to weaken
during, a mid to upper level ridge is forecast to build across the
forecast area from the west. The ridge aloft is then expected to hold
through the upcoming weekend allowing for less favorable conditions
for convective development. The surface high pressure across the central
atlantic will also lift farther northeast by Wednesday therefore weakening
the local pressure gradient. This in turn will support a light to moderate
east to southeast trade wind flow through Sunday.

Expect periods of showers and isolated thunderstorms across the coastal
waters E puerto rico and the u.S. Virgin islands during the late evening
and early morning hours followed by shower and thunderstorm development
mainly across the west and interior sections of puerto rico by late
morning and during the afternoon hours. As the ridge builds aloft and
moisture erodes during the latter part of next week a more seasonable
weather pattern is expected with near normal or slightly warmer temperatures
under the expected east to southeast wind flow.

Aviation... A lingering trough will produce periods of +shra/tsra at
times. Shra/tsra development expected til 29/23z, with bkn-ovc
ceiling at fl025-fl100 are expected across the islands. As a result
periods of MVFR or even ifr conds and mountain obscurations at most
of pr and usvi TAF sites are expected the rest of this afternoon.

Shra/tsra formation expected across the regional waters and into the
usvi/e-pr aft 30/02z. Low level winds will continue mainly east at
10-20 kts with higher gusts til 29/23, dropping at 10 knots or less
overnight.

Marine... Mariners should exercise caution across the local waters
due to seas between 4 and 6 feet and winds between 15 and 20 knots.

Thunderstorm formation is likely across the local waters through at
least Sunday.

Preliminary point temps/pops
Sju 72 83 72 86 / 60 60 50 50
stt 72 81 72 87 / 50 50 50 50

Sju watches/warnings/advisories
Pr... None.

Vi... None.

Am... None.

Short term... Jf
long term... .99


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
YABP4 - 9754228 - Yabucoa Harbor, PR 5 mi44 min NE 1 G 7
JOXP4 - Jobos Bay Reserve, Puerto Rico 18 mi89 min NE 1 76°F 1018 hPa71°F
ESPP4 - 9752695 - Esperanza, PR 23 mi44 min E 5.1 G 16 77°F 81°F1018.1 hPa
VQSP4 - 9752619 - Isabel Segunda, Vieques, PR 25 mi44 min E 7 G 12 78°F
FRDP4 - 9753216 - Fajardo, PR 27 mi44 min E 13 G 15 79°F 72°F
41056 29 mi44 min E 16 G 19 78°F 1018.2 hPa
SJNP4 - 9755371 - San Juan, PR 34 mi44 min ESE 12 G 16 80°F 81°F1018.4 hPa
CLBP4 - 9752235 - Culebra, PR 37 mi44 min 77°F 81°F1018.2 hPa

Wind History for Yabucoa Harbor, PR
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Last
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NE4
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NE5
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NE4
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Juan, Luis Munoz Marin International Airport, PR30 mi18 minE 810.00 miPartly Cloudy78°F73°F87%1018.4 hPa

Wind History from JSJ (wind in knots)
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Last 24hrE13E10E11E11E13E12E7NE9S3E9SE10SE13
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NE7E12E15E14E9E12E11E10E10E8
1 day agoE8E11E13E9E9E9E7E11E10E11E12E16
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G25
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E20E13E12E14E12E3SE3E13E11
2 days agoSE4E3CalmE4CalmSE4E5E7E8E12E10E14E14E17
G21
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G22
E16E14E18E14E12E9E10E8E10

Tide / Current Tables for Puerto Maunabo, Puerto Rico
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Puerto Maunabo
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Sat -- 05:57 AM AST     Sunrise
Sat -- 08:55 AM AST     Moonrise
Sat -- 03:18 PM AST     -0.26 feet Low Tide
Sat -- 06:43 PM AST     Sunset
Sat -- 10:16 PM AST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.60.60.60.50.50.40.30.30.20.10-0.1-0.1-0.2-0.2-0.3-0.3-0.2-0.10.10.20.40.50.6

Tide / Current Tables for Vieques Passage, Puerto Rico Current
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Vieques Passage
Click for Map
Sat -- 12:46 AM AST     0.94 knots Max Flood
Sat -- 03:58 AM AST     -0.00 knots Slack
Sat -- 05:56 AM AST     Sunrise
Sat -- 07:26 AM AST     -1.08 knots Max Ebb
Sat -- 08:53 AM AST     Moonrise
Sat -- 11:05 AM AST     0.00 knots Slack
Sat -- 01:48 PM AST     0.64 knots Max Flood
Sat -- 04:44 PM AST     -0.00 knots Slack
Sat -- 06:43 PM AST     Sunset
Sat -- 07:32 PM AST     -0.59 knots Max Ebb
Sat -- 10:14 PM AST     0.00 knots Slack
Sat -- 10:16 PM AST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.90.90.80.4-0-0.5-0.9-1.1-1-0.8-0.5-00.30.60.60.50.2-0.1-0.4-0.6-0.6-0.4-0.10.3

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 (23,6,7,8)
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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.