Tuesday, November21, 2017 L-36.com


Marine Weather and Tides
Central Aguirre, 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 5:38AMSunset 5:15PM Tuesday November 21, 2017 3:17 PM CST (21:17 UTC) Moonrise 8:32AMMoonset 8:58PM Illumination 10% Phase: Waxing Crescent; Moon at 3 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- 419 Pm Ast Tue Nov 21 2017
Tonight..Southeast winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 8 seconds. Isolated showers.
Wednesday..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 8 seconds. Isolated showers.
Wednesday night..Southeast winds 5 to 10 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 8 seconds. Isolated showers.
Thursday..East winds 10 to 15 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 9 seconds. Isolated showers.
Thursday night..East winds 10 to 15 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 9 seconds. Isolated showers.
Friday..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 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..Southeast winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 11 seconds. Isolated showers.
AMZ700 419 Pm Ast Tue Nov 21 2017
Synopsis for puerto rico and the uS. Virgin islands waters... Light to moderate easterly winds expected across the local waters, as a surface high pressure ridge will build and move eastward across the west atlantic through Wednesday. Seas will increase briefly up to 7 feet on Wednesday night across the atlantic waters, as a cold frontal boundary sinks southward into the tropical atlantic.

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 212105
afdsju
area forecast discussion
national weather service san juan pr
505 pm ast Tue nov 21 2017

Synopsis A mid to upper level ridge will continue to dominate
the local weather pattern during the next several days. Drier air
will continue through Wednesday. Moisture increases once again on
Thursday and Friday as an induced surface trof moves from the
east. Drier conditions return during the weekend.

Short term Today through Thursday...

little to none rain was observed today over land areas. Mostly
sunny skies prevailed across all islands. Fair weather conditions
will continue through Wednesday. A few isolated showers cant be
ruled out across western pr during the afternoon hours. On
Thursday, as a weak perturbation induced trof moves from the
east... Moisture will increase and a better chance for shower with
possible isolated thunderstorm development is expected along the
the cordillera central during Thursday afternoon. Temperatures
will continue between the high 80s to low 90s across the lower
elevations each day.

Long term From previous discussion... .Friday through
Wednesday...

high pressure that forms just north of the mona channel Wednesday
night will bring in moisture on Thursday from the northeast that
will linger until early Saturday morning. This and the easterly
wave that will move through on Friday will continue the good
chances for both night and early morning showers in eastern puerto
rico and the u.S. Virgin islands and showers and isolated
thunderstorms in western puerto rico in the afternoon. A break in
the moisture will occur over the weekend. As a cold front sweeps
down through the last of the bahama islands on Monday a new surge
of tropical moisture invades the area from the caribbean sea to
the south. Lower levels will then see wet and dry periods during
the first part of next week and the front will lift to the north
mid week next week before reaching the area.

The ridge of high pressure at upper levels will continue just
east of the area and keep convection limited. The deep long wave
trough invading the western atlantic on Sunday will weaken in the
process of flattening that ridge in its passage through the area
on Wednesday of next week. Although good moisture will be
available during the week next week it will not be as strong as
has occurred in the last few days.

Aviation Vfr conds across the flying area and at all terminals
durg the prd. Few shra en route btw islands with few-sct cld lyrs nr
fl030... Fl050 overnight til 22 14z. L lvl wnds fm SE 10-15 kts,blo
fl100... Bcmg sw-w then incr W ht abv. Sfc wnd lgt vrb... Bcmg e-se 10-
15 kts with sea breeze variations along the coastal areas aft
22 14z. No sig wx impact across the region attm.

Marine Seas will continue between 3-5 feet across the offshore
waters and between 2-4 feet across the coastal waters through
Wednesday. Seas increase up to 7 feet across the offshore atlantic
waters between Wednesday night and Thursday. A small craft
advisory will be in effect through this period. A moderate risk of
rip currents will continue for the next several days across the
atlantic beaches of the islands.

Preliminary point temps pops
Sju 75 88 76 88 20 20 30 50
stt 76 87 77 85 20 30 50 50

Sju watches warnings advisories
Pr... Flash flood watch through Wednesday afternoon for northwest-
western interior.

Vi... None.

Am... Small craft advisory from 8 pm Wednesday to 2 pm ast Thursday
for atlantic waters of puerto rico and usvi from 10 nm to
19.5n.

Short term... Jf
long term... .Ds


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SJNP4 - 9755371 - San Juan, PR 11 mi48 min 84°F1012.2 hPa
41053 - San Juan, PR 12 mi48 min E 16 G 19 83°F 1011.2 hPa
YABP4 - 9754228 - Yabucoa Harbor, PR 25 mi48 min 88°F
JOXP4 - Jobos Bay Reserve, Puerto Rico 25 mi93 min E 8.9 84°F 1013 hPa73°F
AROP4 - 9757809 - Arecibo, PR 30 mi48 min ENE 9.9 G 18
42085 - Southeast of Ponce, PR 36 mi78 min E 18 G 19 85°F 84°F1010.7 hPa (-1.5)
41056 38 mi48 min ESE 9.7 G 14 82°F 1012.4 hPa
CLBP4 - 9752235 - Culebra, PR 47 mi48 min 89°F 84°F1012.8 hPa

Wind History for San Juan, PR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Juan, Luis Munoz Marin International Airport, PR1343 mi22 minE 1010.00 miPartly Cloudy84°F73°F72%1011.9 hPa

Wind History from JSJ (wind in knots)
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Last 24hrCalmCalmW3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmE6E11E9E11NE14E14E14E10E10
1 day agoSE3CalmCalmSE4SE3SE4S3E3E3W3CalmN3SE4SE3S3Calm3NE5N8NE8NE9E8SW5W5
2 days agoS10CalmCalmCalmCalmCalmSE3SE4CalmSW3CalmSW3CalmSE3Calm3CalmNE7NE8NE9CalmNW3CalmSW6

Tide / Current Tables for San Juan, La Puntilla, San Juan Bay, Puerto Rico
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San Juan
Click for Map
Tue -- 03:54 AM AST     0.07 feet Low Tide
Tue -- 06:34 AM AST     Sunrise
Tue -- 09:01 AM AST     Moonrise
Tue -- 11:11 AM AST     1.73 feet High Tide
Tue -- 05:46 PM AST     Sunset
Tue -- 05:57 PM AST     0.53 feet Low Tide
Tue -- 08:27 PM AST     Moonset
Tue -- 10:31 PM AST     0.90 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.70.50.30.10.10.20.40.711.41.61.71.71.51.210.70.60.50.60.70.80.90.9

Tide / Current Tables for San Juan, Puerto Rico
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San Juan
Click for Map
Tue -- 03:54 AM AST     0.08 feet Low Tide
Tue -- 06:34 AM AST     Sunrise
Tue -- 09:01 AM AST     Moonrise
Tue -- 11:11 AM AST     1.73 feet High Tide
Tue -- 05:46 PM AST     Sunset
Tue -- 05:56 PM AST     0.55 feet Low Tide
Tue -- 08:27 PM AST     Moonset
Tue -- 10:30 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
0.70.50.30.10.10.20.40.71.11.41.61.71.71.51.310.70.60.50.60.70.80.90.9

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 (16,3,4,5)
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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.