Saturday, August19, 2017 L-36.com


Marine Weather and Tides
Daguao, 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 6:04AMSunset 6:47PM Saturday August 19, 2017 2:25 PM AST (18:25 UTC) Moonrise 3:47AMMoonset 5:07PM Illumination 7% Phase: Waning Crescent; Moon at 27 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- 1011 Am Ast Sat Aug 19 2017
.small craft advisory in effect until 2 pm ast this afternoon...
Rest of today..East winds 15 to 20 knots. Seas 5 to 7 feet with occasional seas up to 9 feet. Dominant period 8 seconds. Northeast swell around 4 feet shifting to the southeast in the afternoon. Scattered showers late in the morning, then isolated Thunderstorms in the afternoon.
Tonight..East winds 10 to 15 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 8 seconds. Isolated Thunderstorms in the evening, then isolated showers after midnight.
Sunday..East winds 10 to 15 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 10 seconds. East swell 4 to 5 feet. Isolated Thunderstorms through the day. Scattered showers in the afternoon.
Sunday night..East winds 10 to 15 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 8 seconds. Southeast swell 4 to 5 feet in the evening. Numerous showers and isolated Thunderstorms.
Monday..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 8 seconds. Scattered showers.
Tuesday..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 8 seconds. Scattered showers.
Wednesday..East winds 5 to 10 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 8 seconds. Scattered showers.
AMZ700 1011 Am Ast Sat Aug 19 2017
Synopsis for puerto rico and the uS. Virgin islands waters... Tropical storm harvey will continue to move westward across the caribbean sea, passing well south of the coastal waters. Hazardous seas can be expected across the caribbean waters and local passages. Hazardous seas will continue across the offshore atlantic waters through Monday as a low pressure area northeast of the leeward islands moves north of the forecast area.

7 Day Forecast for Marine Location Near Daguao, PR
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location: 18.19, -65.62     debug


Area Discussion for - San Juan, PR
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Fxca62 tjsj 191321
afdsju
area forecast discussion
national weather service san juan pr
921 am ast Sat aug 19 2017

Update Just a quick update to the zone and marine forecasts to
increase the chances for showers and thunderstorms over the
caribbean waters and over st. Croix in the usvi. Doppler radar and
satellite images were indicating that showers thunderstorms on the
periphery of TS harvey were increasing from just south of st.

Croix and through the offshore caribbean waters of puerto rico.

Will expect this trend to continue through at least the afternoon
hours with a gradual improvement after that. A few of these
showers thunderstorms could produce wind gusts to 30 mph (25
knots).

Prev discussion issued 520 am ast Sat aug 19 2017
synopsis... Tropical storm harvey will continue to move westward
across the caribbean sea, passing well south of the forecast area
throughout the day. The chance for showers and thunderstorms are
expected to increase across the local isles during the weekend as
the peripheral moisture of TS harvey reaches the forecast area as
well as invest 92l likely to move northeast of the area on
Sunday-mon.

Short term... Today through Monday...

partly cloudy skies prevailed across puerto rico and the u.S.

Virgin islands overnight. Some showers affected mainly the
northern u.S. Virgin islands and the eastern half of puerto rico.

Some of these showers produced brief periods of moderate to heavy
rainfall.

An increase in shower activity is expected today as trade winds will
transport patches of low level moisture across the region. This
moisture in combination with daytime heating and local effects will
produce scattered showers with isolated thunderstorms this afternoon
mainly across the cordillera central of puerto rico. In the meantime,
tropical storm harvey will continue to pass well south of the region
today.

By Sunday, an area of low pressure is expected to pass mainly north
of the area. However, plenty of moisture associated with this system
will aid in the development of showers and thunderstorms once again
Sunday afternoon and will continue into the early morning hours on
Monday. By Monday afternoon, at this time, showers and thunderstorms
are expected to develop mainly north of the cordillera central of
puerto rico. Rest of the area, some passing showers are expected.

Long term... Tuesday through Sunday...

as moisture associated with invest 92l moves away, a drier air
mass in expected to encompass the forecast area on Tuesday. This
drier air mass is expected to be short-lived as a mid to upper
level trough establishes north enhancing moisture advection wed-
thu. By the end of the workweek and into the upcoming weekend, a
mid level ridge is then expected to build across the central
atlantic and into the northeast caribbean to result once again in
moisture erosion. Therefore a seasonal weather pattern is expected
to prevail much of the forecast period with locally induced
showers and thunderstorms each day. At this time, the best chance
for shower and thunder activity is expected wed-thu due to
moisture advection as the proximity of the upper trough.

Aviation... MainlyVFR conditions will prevail across all TAF sites
through at least 19 16z. Periods of MVFR conditions with mountain
obscurations will prevail across tjbq and tjmz from 19 16z through
19 22z in shra tsra. Vcsh can be expected elsewhere.

Marine... Tropical storm harvey will continue to move westward
across the caribbean sea, passing well south of the forecast area
throughout the day. This will result in hazardous seas 8 to 10
feet and winds 20 to 25 knots particularly across the caribbean
waters and local passages. Hazardous seas will continue to prevail
across the offshore atlantic waters through Monday as an area of
low pressure east northeast of the leeward islands moves to the
northeast of the forecast area.

Preliminary point temps pops
Sju 89 79 90 80 40 40 50 30
stt 91 81 88 81 40 50 50 60

Sju watches warnings advisories
Pr... High rip current risk until 6 pm ast this evening for central
interior-culebra-north central-northeast-northwest-ponce
and vicinity-san juan and vicinity-southeast-southwest-
vieques-western interior.

Small craft advisory until 8 pm ast this evening for southeast.

Vi... High rip current risk until 6 pm ast this evening for st croix.

Small craft advisory until 2 pm ast this afternoon for
st.Thomas... St. John... And adjacent islands.

Am... High rip current risk until 6 pm ast this evening for coastal
waters of southwestern puerto rico out 10 nm-coastal waters
of southern puerto rico out 10 nm.

Small craft advisory until 8 pm ast this evening for coastal
waters of northwestern puerto rico out 10 nm-coastal waters
of southwestern puerto rico out 10 nm-coastal waters of
northern puerto rico out 10 nm-coastal waters of southern
puerto rico out 10 nm.

Small craft advisory until 2 am ast Sunday for caribbean waters
of puerto rico from 10 nm to 17n-mona passage southward to
17n.

Small craft advisory until 2 pm ast this afternoon for anegada
passage southward to 17n-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 8 am ast Monday for atlantic waters
of puerto rico and usvi from 10 nm to 19.5n.

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


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
VQSP4 - 9752619 - Isabel Segunda, Vieques, PR 10 mi38 min ESE 5.1 G 12 85°F
FRDP4 - 9753216 - Fajardo, PR 10 mi38 min E 13 G 17 79°F 76°F
ESPP4 - 9752695 - Esperanza, PR 10 mi38 min ESE 9.9 G 15 86°F 86°F1012.2 hPa
41056 10 mi56 min NNE 12 G 16 81°F 1012.5 hPa
YABP4 - 9754228 - Yabucoa Harbor, PR 15 mi38 min ENE 7 G 13 89°F
CLBP4 - 9752235 - Culebra, PR 19 mi38 min 89°F 85°F1012.2 hPa
41053 - San Juan, PR 32 mi56 min ENE 16 G 18 85°F 1012 hPa
SJNP4 - 9755371 - San Juan, PR 32 mi44 min ENE 16 G 19 86°F 85°F1012.6 hPa
41058 32 mi26 min E 14 G 19 83°F 85°F5 ft
JOXP4 - Jobos Bay Reserve, Puerto Rico 36 mi101 min E 12 88°F 1013 hPa77°F
CHAV3 - 9751639 - Charlotte Amalie, VI 38 mi38 min E 6 G 9.9 87°F 85°F
41052 - South of St. John, Virgin Islands 46 mi56 min ENE 16 G 18 85°F 1010.9 hPa
LAMV3 48 mi38 min 85°F 86°F

Wind History for Isabel Segunda, Vieques Island, PR
(wind in knots)    EDIT      (on/off)   Help
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E8
G14
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SE8
G16
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E7
G12
NE6
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G20
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G15
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SE6
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G12
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G8
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G11
SE3
G9
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E2
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G17
S3
E2
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SW4
SE9
G15

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Juan, Luis Munoz Marin International Airport, PR26 mi30 minENE 17 G 2310.00 miPartly Cloudy87°F78°F75%1011.8 hPa

Wind History from JSJ (wind in knots)
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Last 24hrNE15E14
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E11E10E15E12E14E12E13E11E11E12E10E11E21
G26
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G24
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G23
1 day agoE10
G14
E13E10E9E7SE4E3E3SE4CalmS3E7CalmSE3E3SE4SE5SE5E11E18
G23
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G22
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2 days agoE14NE14
G21
NE16
G21
NE13E11E15E14E15E11E13E14E20
G29
SE4E8E6S4E9
G18
E12
G20
SE7E7SE6SE9
G19
SE6SE7

Tide / Current Tables for Roosevelt Roads, Puerto Rico
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Roosevelt Roads
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Sat -- 01:27 AM AST     0.37 feet Low Tide
Sat -- 03:47 AM AST     Moonrise
Sat -- 06:03 AM AST     0.74 feet High Tide
Sat -- 06:05 AM AST     Sunrise
Sat -- 12:42 PM AST     -0.08 feet Low Tide
Sat -- 05:07 PM AST     Moonset
Sat -- 06:46 PM AST     Sunset
Sat -- 07:36 PM AST     1.23 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.50.40.40.50.60.70.70.70.60.40.20.1-0.1-0.100.20.50.81.11.21.21.110.8

Tide / Current Tables for Vieques Passage, Puerto Rico Current
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Vieques Passage
Click for Map
Sat -- 02:43 AM AST     -0.91 knots Max Ebb
Sat -- 03:47 AM AST     Moonrise
Sat -- 06:05 AM AST     Sunrise
Sat -- 06:26 AM AST     0.00 knots Slack
Sat -- 09:00 AM AST     0.49 knots Max Flood
Sat -- 11:44 AM AST     -0.00 knots Slack
Sat -- 02:42 PM AST     -0.55 knots Max Ebb
Sat -- 05:07 PM AST     Moonset
Sat -- 05:27 PM AST     0.00 knots Slack
Sat -- 06:46 PM AST     Sunset
Sat -- 08:57 PM AST     0.84 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.3-0.6-0.9-0.9-0.8-0.5-0.10.20.40.50.40.2-0.1-0.3-0.5-0.5-0.4-0.20.20.50.80.80.70.5

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 (14,3,4,5)
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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.