Friday, July28, 2017 L-36.com


Marine Weather and Tides
Aguas Claras, 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 5:58AMSunset 6:59PM Friday July 28, 2017 9:05 AM AST (13:05 UTC) Moonrise 10:51AMMoonset 11:06PM Illumination 24% Phase: Waxing Crescent; Moon at 5 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- 411 Am Ast Fri Jul 28 2017
Today..Southeast winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Scattered showers through the day. Isolated Thunderstorms in the afternoon.
Tonight..Southeast winds 5 to 10 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Scattered showers.
Saturday..Southeast winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Scattered showers through the day. Isolated Thunderstorms in the afternoon.
Saturday night..East winds 15 to 20 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Scattered showers and isolated Thunderstorms.
Sunday..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Scattered showers.
Monday..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 11 seconds. Southeast swell 4 to 5 feet. Scattered showers.
Tuesday..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 11 seconds. Northeast swell 4 to 7 feet. Scattered showers.
AMZ700 411 Am Ast Fri Jul 28 2017
Synopsis for puerto rico and the uS. Virgin islands waters... A weak tropical wave is moving across the islands today. This will produce an increase in showers and Thunderstorms across the regional waters. A surface high pressure across the central atlantic will continue to yield moderate east to southeasterly winds into the upcoming weekend. Seas and winds are forecast to increase early next week.

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 280920
afdsju
area forecast discussion
national weather service san juan pr
520 am ast Fri jul 28 2017

Synopsis
A weak tropical wave will move across the region today. After this
wave a relative dry air mass is expected to filters tonight into
Saturday morning. A tutt low will continue to meander northeast
of the islands through at least early Saturday morning. This
feature is forecast to weakens as a high pressure ridge builds at
mid levels and hold into the upcoming week. A broad surface high
pressure will continue over the central atlantic ocean.

Short term Today through Sunday...

columnar moisture reached a minimum of 1.61 inches at 28 06z and
will increase to almost 2 inches by 29 06z as the moisture centered
over the leeward islands moves over the local area today and
tonight. During this time clouds and showers will increase. The gfs
suggest that the lifted index for the surface based parcel will
reach minus 9 this afternoon so expect some isolated thunderstorms
before the best moisture arrives. Showers will continue through most
of the night--but mainly over the local waters, the usvi and the
southeast third of puerto rico. Thunderstorms will likely end
after 29 04z. Although drier air follows the wave, another band of
moisture moves through on Saturday night and this will increase
showers on the southeastern side of puerto rico and around the u.S.

Virgin islands then. This moisture will not have completely exited
puerto rico by 30 18z and this will trigger another round of strong
thunderstorms with heavy rain.

Moisture will be better today than Saturday and this will mean many
more showers and thunderstorms will develop today with areas of
urban and small stream flooding developing later this afternoon.

Then, not as much flooding on Saturday will occur, although some
local areas of flooding are expected, then on Sunday more urban and
small stream flooding is expected to develop.

For the north coast of puerto rico temperatures will drive into the
low to mid 90s owing to the drier air just ahead of the wave and the
southeast flow setting up over the island. The forecast is for 93
degrees in san juan and this would be a record, since the high for
july 28 was 92 degrees set in 1981. Temperatures will not be far
behind on the south coast. Fortunately, although southeast flow
continues, moisture and clouds will keep temperatures a little below
the record tomorrow, which, for san juan, is 93 degrees.

Long term Monday through Saturday...

a mid level ridge is expected to hold across the area through at
least the end of the work week, turning the atmosphere unfavorable
for organize convection. However, a tropical wave accompanied by a
wind surge is expected to swing by the region on Monday or Tuesday.

At lower levels, a broad high pressure across the central atlantic
will result in east to east-southeast winds through Tuesday. Under
this wind flow, above normal temperatures are possible mainly
along the coastal sections of puerto rico. Then, winds are
expected to increase and shift from the east northeast after
Tuesday.

Although upper level dynamic is not favorable next week, moisture
advection with a moderate to strong northeast wind flow will
result in a seasonable weather pattern each day across the region.

As a result expect trade wind showers across the u.S. Virgin
islands and east puerto rico overnight into the early morning
hours. Followed by afternoon convection along and to the west of
the cordillera central of puerto rico. A surface disturbance is
forecast to move in Wednesday into Thursday providing moisture
pooling and increasing the chance of showers and thunderstorms
across the region. After the passage of this disturbance a dry air
mass with saharan dust particles is forecast to filters over the
region Friday into the weekend.

Aviation
Vfr conditions will prevail over all TAF sites til arnd
28 14z. Aft 28 14z areas of convection will form due to an induced
tropical wave and instability mainly over western and central pr and
downstream from the usvi. Aft 28 16z MVFR ifr conds with mtn
obscurations are psbl in these areas and vcty or over
tjmz tjbq tjsj tjps in shra tsra. Winds bcmg SE 5-15 kt aft 28 12z
up thru fl140. Winds abv fl140 are less than 15 kt.

Marine
Tranquil marine conditions expected to prevail across the regional
waters through the upcoming weekend. Mariners can expect seas
below 5 feet and winds below 18 knots. The potential for showers
and thunderstorms is expected to increase during the afternoon
hours and mariners should exercise caution due to this activity.

Seas and winds are forecast to increase by the upcoming week.

If model are right, this weather pattern would require small
craft advisories.

Preliminary point temps pops
Sju 93 79 91 79 40 20 40 40
stt 88 81 90 79 30 30 50 50

Sju watches warnings advisories
Pr... None.

Vi... None.

Am... None.

Short term... Ws
long term... .Cam
aviation... Ws


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FRDP4 - 9753216 - Fajardo, PR 7 mi48 min E 5.1 G 7 85°F 77°F
41056 9 mi66 min E 9.7 G 14 84°F 2 ft1015.3 hPa (+1.1)
VQSP4 - 9752619 - Isabel Segunda, Vieques, PR 11 mi48 min SE 5.1 G 8 85°F
ESPP4 - 9752695 - Esperanza, PR 12 mi48 min ESE 7 G 9.9 85°F1015.4 hPa
YABP4 - 9754228 - Yabucoa Harbor, PR 17 mi48 min SW 1 G 1.9 83°F
CLBP4 - 9752235 - Culebra, PR 18 mi48 min 86°F 85°F1015.6 hPa
41053 - San Juan, PR 30 mi66 min E 3.9 G 5.8 83°F 84°F3 ft1015 hPa (+1.3)
SJNP4 - 9755371 - San Juan, PR 31 mi54 min SW 1.9 G 1.9 83°F 85°F1015.8 hPa
JOXP4 - Jobos Bay Reserve, Puerto Rico 37 mi81 min NE 1.9 82°F 1016 hPa75°F
CHAV3 - 9751639 - Charlotte Amalie, VI 38 mi48 min E 5.1 G 8.9 86°F 86°F
41052 - South of St. John, Virgin Islands 45 mi66 min E 9.7 G 12 85°F 85°F2 ft1014 hPa (+1.1)
LAMV3 48 mi48 min 85°F 85°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 mi70 minE 510.00 miPartly Cloudy82°F75°F82%1015.5 hPa

Wind History from JSJ (wind in knots)
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Last 24hrNE7NE11NE11CalmE14E14E13E13E13E10E8E7Calm3CalmCalmCalmCalmCalmCalmCalmCalmE5E5
1 day agoE8S6E13E6CalmN9E10E9E11E10E9E5E3CalmSE4CalmCalmCalmCalmCalmCalmCalm3E7
2 days agoNE13NE12NE11NE14
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E13NE14E13E10E7SE5E6S4CalmSE3CalmCalmCalmCalmCalmCalmSE4NE6

Tide / Current Tables for Roosevelt Roads, Puerto Rico
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Roosevelt Roads
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Fri -- 12:38 AM AST     0.96 feet High Tide
Fri -- 05:59 AM AST     Sunrise
Fri -- 07:22 AM AST     0.13 feet Low Tide
Fri -- 10:50 AM AST     Moonrise
Fri -- 01:14 PM AST     0.83 feet High Tide
Fri -- 06:58 PM AST     Sunset
Fri -- 07:30 PM AST     0.23 feet Low Tide
Fri -- 11:06 PM AST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.910.90.70.50.40.20.10.20.30.40.60.80.80.80.70.60.40.30.20.20.30.50.6

Tide / Current Tables for Vieques Passage, Puerto Rico Current
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Vieques Passage
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Fri -- 02:33 AM AST     0.57 knots Max Flood
Fri -- 05:21 AM AST     -0.00 knots Slack
Fri -- 05:59 AM AST     Sunrise
Fri -- 08:45 AM AST     -0.79 knots Max Ebb
Fri -- 10:50 AM AST     Moonrise
Fri -- 12:01 PM AST     0.00 knots Slack
Fri -- 03:13 PM AST     0.76 knots Max Flood
Fri -- 06:31 PM AST     -0.00 knots Slack
Fri -- 06:58 PM AST     Sunset
Fri -- 09:32 PM AST     -0.64 knots Max Ebb
Fri -- 11:06 PM AST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.10.40.50.60.40.1-0.2-0.5-0.7-0.8-0.7-0.4-00.40.60.80.70.50.2-0.2-0.4-0.6-0.6-0.5

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 (9,2,3,4)
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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.