Sunday, March26, 2017 L-36.com


Marine Weather and Tides
Vieques, 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 6:19AMSunset 6:36PM Sunday March 26, 2017 1:01 PM AST (17:01 UTC) Moonrise 5:15AMMoonset 5:22PM Illumination 1% Phase: Waning Crescent; Moon at 29 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- 1003 Am Ast Sun Mar 26 2017
Rest of today..South winds 5 to 10 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 10 seconds. Northeast swell around 4 feet. Scattered showers through the day. Isolated Thunderstorms in the afternoon.
Tonight..South winds 5 to 10 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 10 seconds. East swell around 4 feet in the evening. Isolated Thunderstorms in the evening. Scattered showers through the night.
Monday..South winds 5 to 10 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 8 seconds. Scattered showers.
Monday night..South winds 5 to 10 knots veering northwest after midnight. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 8 seconds. Scattered showers.
Tuesday..North winds 5 to 10 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 10 seconds. East swell around 4 feet. Scattered showers.
Wednesday..North winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Northeast swell around 4 feet. Isolated showers.
Thursday..Northeast winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Isolated showers.
AMZ700 1003 Am Ast Sun Mar 26 2017
Synopsis for puerto rico and the uS. Virgin islands waters... Light south to southwest winds expected today as a surface low north of hispaniola moves north. A large northerly swell is relaxing in the local atlantic waters and passages, and will continue causing hazardous seas only into this afternoon. Another northerly swell generated by the surface low is forecast to reach the atlantic waters and passages by the middle of next week.

7 Day Forecast for Marine Location Near Vieques, PR
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location: 18.15, -65.43     debug


Area Discussion for - San Juan, PR
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Fxca62 tjsj 261453
afdsju
area forecast discussion... Updated
national weather service san juan pr
1053 am ast Sun mar 26 2017

Update Two northeast-southwest bands of showers persisted
overnight, but the one over the northwest corner of puerto rico
has now completely dissipated. Although light rain has persisted
along the southeast coast of puerto rico, the other band has
remained mainly offshore over the near shore waters, across
vieques and the waters between it and the puerto rico mainland and
across culebra. The band has moved little since dawn this
morning. Models suggest that convection there could continue to be
favored even into the afternoon. Also most models favor
convection to develop over interior puerto rico as the afternoon
begins.

The precipitable water in morning sounding came in almost one
third inch drier than yesterday at 1.61 inches and several layers
at 16 kft and 20 kft came in with 15 percent or less of relative
humidity. Minor thin layers of clouds were indicated in the
sounding at 18 kft and 27 kft. Some convective energy potential
for afternoon convection is indicated but it all but vanishes at
the top of an inversion at 18 kft. Little convection will be able
to top 30 kft today. No change to general discussion below. Minor
short-term grid edits for: warmer temperatures on the north coast
due to additional sunshine, to take out the showers this morning
out of western and northern puerto rico and to increase pops
around stationary band of showers mentioned above.

Aviation Vfr conditions prevail. Areas of tsra are expected to
initiate arnd 26/18z and last until 25/21z over pr north of the
cordillera central, areas of mtn obscurations some of which have
not cleared from this morning will persist til 26/02z. Areas of
MVFR arnd tjbq, tjmz and tjsj. Otherwise TAF sites to continueVFR
except for brief MVFR CIGS in shra arnd tncm/tkpk btwn
25/19-26/09z. Winds alf s-sw 10 to 20 kt up thru fl150. MAX winds
wsw 70 kts at fl400 decreasing slightly thru 27/18z.

Marine Seas came down during the early morning hours and so was
able to cancel high surf advisories for breaking waves of 10 feet
or more in the morning update package. Also the high risk of rip
currents is now moderate in the northern u.S. Virgin islands. The
only remaining small craft advisory is in the local outer
atlantic waters and will come down around 2 pm ast. Models show 7
foot seas returning to the northwest corner of the local outer
atlantic waters returning Monday night.

Prev discussion /issued 645 am ast Sun mar 26 2017/
synopsis... A surface low over the atlantic waters between
hispaniola and pr will continue to move north northeast of the
forecast area for the next few days. A surface high will build
across the western atlantic and into the local area by midweek.

Drier air at mid levels is expected to fill in today and persist
through the end of the week. Light southerly winds will continue
until Monday, becoming northerly and increasing through Thursday.

Short term... Today through Tuesday... A line of showers and
strong thunderstorms persisted across the atlantic waters
northwest of puerto rico overnight. This activity will continue to
move to the northeast approaching the northwest tip of puerto
rico during the morning hours. Showers were also observed over
south central sections of puerto rico as well as across vieques,
culebra and eastern puerto rico overnight. A few light shower
affected the u.S. Virgin islands.

A developing surface low pressure system to the north of hispaniola
this morning will continue to bring a moist and unstable southerly
wind flow across puerto rico and the u.S. Virgin islands today. Less
cloud cover is expected today across the region and therefore
diurnal heating in combination with sea breeze convergence and other
local effects will induce the development of showers and
thunderstorms along and north of the cordillera central,
including the san juan metro area and especially during the
afternoon and early evening hours. Urban and small stream flooding
are possible over northern puerto rico. As the low moves further
northeastward and strengthens over the atlantic waters, moisture
will begin to decrease slowly across the local islands by Tuesday
and thereafter. However, a few thunderstorms may still be possible
during the next several days due to lingering moisture in
combination with local effects--especially in the interior
sections of puerto rico. Due to the expected southerly wind flow,
warmer than normal temperatures are expected across the northern
coastal municipalities of puerto rico during the next few days.

Long term... Wednesday through Sunday... A surface low moves into
the north central atlantic on Wednesday and the ridge across the
western atlantic builds north of the islands through the end of
the week. This will result in a cooler northerly wind flow over
the islands and fair weather conditions through the middle of the
week. East to southeast winds return from Friday through Sunday
with moisture increasing from the southeast... Apparently
associated with remnants of the surface low/frontal boundary.

Aviation... Brief periods of MVFR conditions are expected across
the leeward islands and usvi TAF sites this morning. Shra/tsra
are expected to develop along and north of cordillera central this
afternoon inducing periods of MVFR or even ifr conditions after
26/16z in and around tjmz, tjbq and tjsj. Latest tjsj sounding
indicated a south southwesterly wind flow at all levels, but very
strong aloft.

Marine... Small craft advisories continue in effect today for the
atlantic waters and passages. Northerly swell will continue to
subside through this evening. High surf advisory condtions for
breaking waves of 10 feet or more will continue for the north
facing beaches of pr and a high risk of rip currents will continue
through at least the overnight hours across the northwest to
north coast of pr, culebra and st. Thomas. Beach goers should
avoid these areas and exercise caution if going to any other
beaches of the islands.

Preliminary point temps/pops
Sju 87 74 88 77 / 50 40 50 40
stt 83 75 85 75 / 60 50 50 40

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

High rip current risk until 6 pm ast this evening for culebra.

Vi... None.

Am... Small craft advisory until 2 pm ast this afternoon for atlantic
waters of puerto rico and usvi from 10 nm to 19.5n.

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


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
VQSP4 - 9752619 - Isabel Segunda, Vieques, PR 1 mi43 min SSE 5.1 G 7 78°F
ESPP4 - 9752695 - Esperanza, PR 4 mi43 min S 9.9 G 13 79°F 79°F1013.8 hPa
41056 8 mi61 min SW 14 G 21 77°F 80°F4 ft1013.1 hPa (+0.0)
CLBP4 - 9752235 - Culebra, PR 12 mi43 min 79°F 80°F1013.9 hPa
FRDP4 - 9753216 - Fajardo, PR 17 mi43 min S 5.1 G 15 80°F 73°F
YABP4 - 9754228 - Yabucoa Harbor, PR 22 mi43 min ESE 1.9 G 1.9
CHAV3 - 9751639 - Charlotte Amalie, VI 30 mi43 min SSW 7 G 12 82°F 82°F
41052 - South of St. John, Virgin Islands 36 mi61 min SSE 12 G 14 81°F 80°F4 ft1012.9 hPa (-0.3)
LAMV3 39 mi43 min 80°F 82°F
41053 - San Juan, PR 42 mi61 min ESE 9.7 G 18 84°F 80°F6 ft1012.2 hPa (-0.7)
SJNP4 - 9755371 - San Juan, PR 42 mi43 min SSE 11 G 14 85°F 80°F1012.6 hPa
JOXP4 - Jobos Bay Reserve, Puerto Rico 44 mi76 min S 1.9 80°F 1015 hPa72°F
LTBV3 - 9751401 - Lime Tree Bay, VI 48 mi43 min S 8.9 G 11 81°F 80°F1015 hPa
CHSV3 - 9751364 - Christiansted Harbor, Virgin Islands 48 mi43 min S 8 G 15 84°F 80°F1014 hPa

Wind History for Isabel Segunda, Vieques Island, PR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Juan, Luis Munoz Marin International Airport, PR36 mi65 minESE 910.00 miPartly Cloudy87°F72°F61%1013.1 hPa

Wind History from JSJ (wind in knots)
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Last 24hrSE12
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S7S4SE6S7CalmCalmCalmNW3SW4S6S4CalmS4SE7SE7S9
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1 day agoE9E5SW3NE4E6E6E6SE5SE4SE3E5SE4E4SE3S5SE5CalmS5SE7SE7SE85SE8
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2 days agoCalmN7NW5--N4CalmNW3CalmCalmCalmSW6CalmCalmW4W5S3CalmCalmS3CalmSE3CalmE4E9

Tide / Current Tables for Punta Mulas, Isla de Vieques, Puerto Rico
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Punta Mulas
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Sun -- 12:54 AM AST     -0.01 feet Low Tide
Sun -- 05:15 AM AST     Moonrise
Sun -- 06:20 AM AST     Sunrise
Sun -- 07:31 AM AST     1.00 feet High Tide
Sun -- 01:39 PM AST     0.13 feet Low Tide
Sun -- 05:22 PM AST     Moonset
Sun -- 06:34 PM AST     Sunset
Sun -- 07:38 PM AST     0.91 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0-00.10.20.40.70.9110.90.70.50.30.20.10.20.40.60.80.90.90.80.60.4

Tide / Current Tables for Vieques Passage, Puerto Rico Current
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Vieques Passage
Click for Map
Sun -- 12:27 AM AST     -0.00 knots Slack
Sun -- 03:34 AM AST     -0.61 knots Max Ebb
Sun -- 05:16 AM AST     Moonrise
Sun -- 06:21 AM AST     Sunrise
Sun -- 06:39 AM AST     0.00 knots Slack
Sun -- 09:44 AM AST     0.62 knots Max Flood
Sun -- 12:44 PM AST     -0.00 knots Slack
Sun -- 03:58 PM AST     -0.71 knots Max Ebb
Sun -- 05:22 PM AST     Moonset
Sun -- 06:34 PM AST     Sunset
Sun -- 07:12 PM AST     0.00 knots Slack
Sun -- 10:12 PM AST     0.65 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.1-0.2-0.4-0.6-0.6-0.5-0.20.10.40.60.60.50.2-0.1-0.4-0.6-0.7-0.6-0.4-0.10.30.50.60.6

Weather Map and Satellite Images
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Weather Map
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IR Satellite Image from GEOS
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GOES Local Image of Puerto Rico    EDIT
Geos

Wind Forecast for (13,3,4,5)
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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.