Saturday, February17, 2018 L-36.com


Marine Weather and Tides
Dorado, 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 6:50AMSunset 6:28PM Saturday February 17, 2018 10:51 PM AST (02:51 UTC) Moonrise 8:04AMMoonset 8:07PM Illumination 8% 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- 850 Pm Ast Sat Feb 17 2018
.small craft should exercise caution...
.small craft advisory in effect from Sunday evening through Wednesday morning...
Rest of tonight..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 8 seconds. Scattered showers.
Sunday..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 7 seconds. Scattered showers.
Sunday night..East winds 15 to 20 knots. Seas 5 to 7 feet with occasional seas up to 9 feet. Dominant period 7 seconds. Isolated showers.
Monday..East winds 15 to 20 knots. Seas 5 to 7 feet with occasional seas up to 9 feet. Dominant period 7 seconds. North swell around 4 feet. Isolated showers.
Monday night..East winds 20 to 25 knots. Seas 6 to 8 feet with occasional seas up to 10 feet. Dominant period 7 seconds. North swell around 4 feet. Isolated showers.
Tuesday..East winds 20 to 25 knots. Seas 6 to 8 feet with occasional seas up to 10 feet. Dominant period 8 seconds. North swell around 4 feet. Scattered showers.
Wednesday..East winds 20 to 25 knots. Seas 6 to 8 feet with occasional seas up to 10 feet. Dominant period 12 seconds. North swell 4 to 8 feet. Scattered showers.
Thursday..East winds 15 to 20 knots. Seas 6 to 8 feet with occasional seas up to 10 feet. Dominant period 12 seconds. Northeast swell 4 to 8 feet. Scattered showers.
AMZ700 850 Pm Ast Sat Feb 17 2018
Synopsis for puerto rico and the uS. Virgin islands waters... Surface high pressure will build once again north of the region through next week. Moderate trades will prevail through the weekend and become stronger on Monday through mid week. Seas will continue gradually subside today, but will become hazardous again by late Sunday.

7 Day Forecast for Marine Location Near Dorado, PR
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location: 18.47, -66.29     debug


Area Discussion for - San Juan, PR
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Fxca62 tjsj 180153
afdsju
area forecast discussion
national weather service san juan pr
953 pm ast Sat feb 17 2018

Update A drier air mass has moved across the region tonight. As
a result, only isolated passing showers will affect the local
region from time to time, but overall will remain dry. A patch of
low level moisture is expected to reach the local islands early
Sunday, increasing somewhat the chances for showers. Forecast is
on track with ongoing weather situation.

Aviation Vfr conditions will prevail across all TAF sites
through the forecast period. Low level winds will continue mainly
east northeast at 15 to 20 kts.

Marine No changes from previous discussion.

Prev discussion issued 438 pm ast Sat feb 17 2018
synopsis... Surface high pressure continues to the north of the
local islands, causing moderate east to east northeast winds
across the local area. The local pressure gradient will tighten
early in the workweek as a stronger surface high pressure
develops across the northwestern atlantic.

Short term... Tonight through Monday... Partly cloudy skies
prevailed across puerto rico and the u.S. Virgin islands today. An
area of cloudiness moved across the area, with little
precipitation observed. Latest satelite images depicted a dry air
mass encompassing the region from the east. This dry air mass will
result in less shower activity. Partly cloudy to clear skies are
expected tonight into Sunday morning. A patch of low level
moisture embedded in the trade winds is expected to reach the
local area Sunday morning. Strong high pressure will build across
the region late Sunday into Monday, maintaining relatively dry
weather conditions across the islands.

Long term... .Long term... Tuesday through Sunday... (previous
discussion)
patches of moisture will pass through at times, causing brief
showers over the local area. These showers will mainly be observed
across the local waters, usvi, vieques and culebra as well as
northern and eastern pr, especially during the nighttime and early
morning hours. A strong sfc high pressure across the northwestern
atlantic will cause the local pressure gradient to tighten early
in the workweek, which will cause windy conditions locally. These
winds will likely inhibit the usual sea breeze convergence in the
afternoon hours across western pr, which means that the areas that
could be affected by rain will probably be the local islands and
north and eastern pr, even during the daytime hours. Wednesday
looks to be the day with the best moisture so it is the day, in
the long term range of the forecast, that will likely observe the
best rainfall coverage, however, it is still expected to be
somewhat windy so the showers observe should be very brief. No
major change in the overall pattern is expected other than maybe
the wind speeds decreasing by Thursday.

Aviation... A dry air mass will limit shra across the islands, but
winds btwn 10 and 20 kt will push clouds and trade wind showers at
times mainly across tist tjsj. Shras due to diurnal effects are
expected across the SW quadrant of pr resulting in vcsh at
tjmz tjps. Sct-bkn cld lyrs nr fl025... Fl050... Fl080. Expect
easterly winds at 10-20 kt with gusts in near shra. Winds are
expected to drop around 10 kt overnight.

Marine... Seas have diminshed to around 6 feet across the local
waters.However, hazardous marine conditions are expected to
continue through at least mid next week. Seas will increase once
again late Sunday night. As a result, small craft advisories will
be in effect. Winds up to 20 knots are also expected.

Preliminary point temps pops
Sju 72 84 74 83 30 30 30 20
stt 72 84 72 84 30 30 30 20

Sju watches warnings advisories
Pr... Small craft advisory from 8 pm Sunday to 8 am ast Wednesday for
southeast.

High rip current risk through Sunday evening for north central-
northwest-western interior.

Vi... Small craft advisory from 8 pm Sunday to 8 am ast Wednesday for
st.Thomas... St. John... And adjacent islands.

Am... Small craft advisory from 8 pm Sunday to 8 am ast Wednesday for
anegada passage southward to 17n-atlantic waters of puerto
rico and usvi from 10 nm to 19.5n-caribbean waters of
puerto rico from 10 nm to 17n-coastal waters of northern
puerto rico out 10 nm-coastal waters of northern usvi and
culebra out 10 nm-coastal waters of southern puerto rico
out 10 nm-coastal waters of southern usvi vieques and
eastern puerto rico out 10 nm-mona passage southward to 17n.

Short term... 99
long term... .Fc


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SJNP4 - 9755371 - San Juan, PR 9 mi51 min 78°F1021.1 hPa (+1.3)
41053 - San Juan, PR 10 mi51 min E 16 G 19 78°F 79°F5 ft1020.1 hPa (+1.4)
AROP4 - 9757809 - Arecibo, PR 22 mi51 min SE 2.9 G 4.1
JOXP4 - Jobos Bay Reserve, Puerto Rico 36 mi66 min NNE 4.1 74°F 1021 hPa65°F
YABP4 - 9754228 - Yabucoa Harbor, PR 38 mi51 min 78°F
42085 - Southeast of Ponce, PR 44 mi111 min NE 12 G 14 79°F 79°F1019.2 hPa (+2.0)
41056 46 mi51 min ENE 14 G 18 77°F 4 ft1020.7 hPa (+1.4)

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, PR16 mi1.9 hrsENE 1210.00 miPartly Cloudy75°F68°F78%1021 hPa

Wind History from JSJ (wind in knots)
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Last 24hrE8CalmCalmE10E11NE12NE11NE13E12NE11NE14E15E13E11NE10NE15E17E15NE17E13E15E14E12E11
1 day agoE14
G19
NE15E13E7SE5S3E10E9E12
G16
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G20
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G25
NE14E12NE19NE10E8E6E5E6E4NE10
2 days agoE10E11E14NE13
G21
E12E13E11SE6E10E11E16E17E15
G21
NE17E17E16NE18
G24
NE14E13NE8E10NE8E13E12

Tide / Current Tables for San Juan, Puerto Rico
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San Juan
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Sat -- 03:37 AM AST     -0.04 feet Low Tide
Sat -- 06:51 AM AST     Sunrise
Sat -- 08:03 AM AST     Moonrise
Sat -- 10:23 AM AST     1.39 feet High Tide
Sat -- 04:41 PM AST     0.26 feet Low Tide
Sat -- 06:26 PM AST     Sunset
Sat -- 08:06 PM AST     Moonset
Sat -- 10:15 PM AST     1.04 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.60.40.1-0-00.10.30.711.21.41.41.210.70.40.30.30.40.50.80.911

Tide / Current Tables for San Juan, La Puntilla, San Juan Bay, Puerto Rico
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San Juan
Click for Map
Sat -- 03:36 AM AST     -0.05 feet Low Tide
Sat -- 06:51 AM AST     Sunrise
Sat -- 08:03 AM AST     Moonrise
Sat -- 10:23 AM AST     1.38 feet High Tide
Sat -- 04:41 PM AST     0.24 feet Low Tide
Sat -- 06:26 PM AST     Sunset
Sat -- 08:06 PM AST     Moonset
Sat -- 10:15 PM AST     1.02 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.60.40.1-0-00.10.30.711.21.41.41.20.90.70.40.30.30.30.50.70.911

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 (21,6,7,8)
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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.