Wednesday, August23, 2017 L-36.com


Marine Weather and Tides
Naranjito, 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 6:07AMSunset 6:46PM Wednesday August 23, 2017 4:18 AM AST (08:18 UTC) Moonrise 7:47AMMoonset 8:21PM Illumination 1% Phase: Waxing Crescent; Moon at 1 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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AMZ712 Coastal Waters Of Northern Puerto Rico Out 10 Nm- 401 Am Ast Wed Aug 23 2017
Today..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Isolated showers.
Tonight..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 9 seconds. Isolated showers through the night.
Thursday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 8 seconds. Scattered showers through the day. Isolated Thunderstorms in the afternoon.
Thursday 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 through the night.
Friday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 8 seconds. Scattered showers.
Saturday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 8 seconds. Isolated showers.
Sunday..East winds 15 to 20 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 8 seconds. Isolated Thunderstorms. Scattered showers.
AMZ700 401 Am Ast Wed Aug 23 2017
Synopsis for puerto rico and the uS. Virgin islands waters... Surface high pressure will build over the central atlantic and north of the region today through the upcoming weekend. This will result in moderate east to southeast trade winds and fairly tranquil seas through the weekend.

7 Day Forecast for Marine Location Near Naranjito, PR
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location: 18.31, -66.18     debug


Area Discussion for - San Juan, PR
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Fxca62 tjsj 230159 aaa
afdsju
area forecast discussion... Updated
national weather service san juan pr
959 pm ast Tue aug 22 2017

Update Little change to current thinking. Drying will occur as
next trough approaches Wednesday. Trough is expected to bring
increasing showers late Wednesday and Thursday. Have raised some
interior temperatures as sunny conditions and southerly winds will
help mid-elevations rise into the low to mid 80s.

Aviation Vfr will prevail at all TAF sites till arnd 23 18z.

Moisture from an approaching trof induced by at upper level low
will apch the leeward islands from the SE bringing shra and ocnl
MVFR at tncm tkpk. Also aft 23 17z some shra isold tsra will form
over the cordillera central in pr and spread n, W and S til
23 21z. Mtn obscurations, MVFR conds are likely in interior pr and
brief MVFR is expected at tjmz. Winds ene 10 to 15 kt up thru
fl350, but bcmg ese 5-15 kt and veering with height to S up thru
fl140 by 23 18z. Nly flow abv fl250 at 10-15 kt will continue
backing slowly as the day progresses.

Marine Seas will subside through Thursday night. Although winds
and seas increase Friday into the weekend, small craft advisories
are not expected through the end of august.

Prev discussion issued 457 pm ast Tue aug 22 2017
synopsis... Surface high pressure ridge will retrogress westward
into the west atlantic allowing an elongated trough to move west
across the region Wednesday through Thursday. The high pressure
ridge is to reestablish once again north of the region by Friday.

Another surface trough is forecast to approach the region Saturday
through Sunday bringing a surge of low level moisture cross the
forecast area.

Short term... Rest of today through Thursday... Activity across
the local islands should diminish just after sunset leaving partly
cloudy to mostly clear skies... With only a few passing showers
expected to affect the coastal waters overnight. On Wednesday
somewhat drier airmass will spread across the region along with
the saharan air layer in advance of the surface trough expected
to move across the region late Wednesday through Thursday. This
added moisture on Thursday will increase the chance for showers
and isolated thunderstorms activity along with the increasing
instability aloft as a tutt low will shift westward just north of
the region. This will support a better chance for enhanced afternoon
convection across portions of the coastal waters and parts of the
islands on Thursday. The prevailing east to northeast winds are
also forecast to become more east to southeast during the latter
part of the week resulting in warmer temperatures along the northern
half of puerto rico.

Long term... Friday through Wednesday... A much drier air mass is
forecast to encompass the region by Friday as the tutt weakens and
an upper level ridge builds across the region. In addition... Model
guidance and aerosol products continue to suggest the presence of
saharan dust across the region through most of the period, with the
highest concentration expected on Friday. However, locally and diurnally
induced showers and isolated afternoon thunderstorms will remain possible
each day mainly over the west and interior sections of pr. Late Saturday
through Sunday another induced surface trough is forecast to arrive,followed
by drier conditions on Monday. A tropical wave is far forecast to approach
the region by Tuesday. So far still no significant development is expected
with any of these features at this time.

Aviation... Incr cld cover with brief mtn top obscr across the
central and west interior sections of pr due to aftn shra isold
tsra til 22 23z. Shra tsra are expected to result in sct- bkn
ceiling btw fl020-fl080 at tjbq tjmz tjps... With tempo MVFR for
tjmz tjps and vcts psbl at tjbq. Elsewhere mainly vcsh around rest
taf sites and local flying area whereVFR conds will prevail. Easterly
sfc winds around 15 kts with sea breezes and higher gusts, bcmg
calm to light and variable aft 22 23z.

Marine... The local buoy network observed tranquil marine conditions with
overall seas below 5 feet and winds below 18 knots. These marine conditions
are so far forecast to prevail through Friday.

Preliminary point temps pops
Sju 78 89 79 91 20 20 30 40
stt 80 90 81 90 20 20 30 30

Sju watches warnings advisories
Pr... None.

Vi... None.

Am... None.

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


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SJNP4 - 9755371 - San Juan, PR 11 mi49 min ESE 4.1 G 5.1 82°F 85°F1013 hPa
41053 - San Juan, PR 12 mi49 min SE 3.9 G 5.8 83°F 1012.2 hPa
JOXP4 - Jobos Bay Reserve, Puerto Rico 25 mi94 min Calm 77°F 1013 hPa73°F
YABP4 - 9754228 - Yabucoa Harbor, PR 25 mi49 min Calm G 1.9 77°F
FRDP4 - 9753216 - Fajardo, PR 29 mi49 min SW 4.1 G 5.1 79°F 74°F
AROP4 - 9757809 - Arecibo, PR 30 mi49 min ESE 1.9 G 2.9
42085 - Southeast of Ponce, PR 36 mi49 min NE 7.8 G 9.7 83°F 1011.6 hPa
41056 38 mi49 min E 7.8 G 9.7 83°F 1012.5 hPa
VQSP4 - 9752619 - Isabel Segunda, Vieques, PR 40 mi49 min Calm G 1 79°F
ESPP4 - 9752695 - Esperanza, PR 40 mi49 min NE 1.9 G 4.1 78°F 84°F1012.5 hPa
CLBP4 - 9752235 - Culebra, PR 47 mi49 min 79°F 85°F1012.6 hPa

Wind History for San Juan, PR
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Juan, Luis Munoz Marin International Airport, PR13 mi83 minN 010.00 miA Few Clouds81°F75°F82%1012.8 hPa

Wind History from JSJ (wind in knots)
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Last 24hrS3CalmS3E3E10E12NE12NE10E13NE13E15
G21
E14E11NE11NE9E8E8E9E5E5SE3CalmCalmCalm
1 day agoCalmSE3CalmE3E5E9E13E11NE13
G17
NE10NE15
G18
E11E15E14E11E8E6E6SE3CalmE3CalmS3Calm
2 days agoCalmCalmCalmCalm3E3NE8CalmE11E10SE5S3S3E7E3SE5SE4SE4E3E8CalmCalmCalmE3

Tide / Current Tables for San Juan, La Puntilla, San Juan Bay, Puerto Rico
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San Juan
Click for Map
Wed -- 04:12 AM AST     0.38 feet Low Tide
Wed -- 06:08 AM AST     Sunrise
Wed -- 07:46 AM AST     Moonrise
Wed -- 09:58 AM AST     1.46 feet High Tide
Wed -- 04:08 PM AST     0.16 feet Low Tide
Wed -- 06:45 PM AST     Sunset
Wed -- 08:21 PM AST     Moonset
Wed -- 10:38 PM AST     1.70 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.41.10.80.50.40.40.60.91.21.41.51.41.20.80.50.30.20.20.40.81.21.51.71.7

Tide / Current Tables for San Juan, Puerto Rico
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San Juan
Click for Map
Wed -- 04:12 AM AST     0.39 feet Low Tide
Wed -- 06:08 AM AST     Sunrise
Wed -- 07:46 AM AST     Moonrise
Wed -- 09:59 AM AST     1.47 feet High Tide
Wed -- 04:09 PM AST     0.17 feet Low Tide
Wed -- 06:45 PM AST     Sunset
Wed -- 08:21 PM AST     Moonset
Wed -- 10:38 PM AST     1.71 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.51.10.80.50.40.40.60.91.21.41.51.41.20.90.50.30.20.20.50.81.21.51.71.7

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 (4,6,7,8)
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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.