Friday, May26, 2017 L-36.com


Marine Weather and Tides
Central Aguirre, PR

Version 3.4
What's New / NOTES
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 5:15AMSunset 5:59PM Friday May 26, 2017 1:25 AM CST (07:25 UTC) Moonrise 7:05AMMoonset 7:32PM Illumination 1% Phase: New Moon; 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- 916 Pm Ast Thu May 25 2017
Rest of tonight..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 10 seconds. North swell 4 to 5 feet.
Friday..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 10 seconds. Northeast swell around 4 feet. Isolated showers.
Friday night..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 10 seconds. Isolated showers.
Saturday..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 10 seconds. Northeast swell around 4 feet. Scattered showers.
Saturday night..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 10 seconds. Isolated showers.
Sunday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 8 seconds. Isolated showers.
Monday..East winds 15 to 20 knots. Seas 1 to 3 feet. Dominant period 7 seconds. Isolated showers.
Tuesday..East winds 15 to 20 knots. Seas 1 to 3 feet. Dominant period 8 seconds. Scattered showers. Isolated Thunderstorms.
AMZ700 916 Pm Ast Thu May 25 2017
Synopsis for puerto rico and the uS. Virgin islands waters... A broad surface high pressure will remain anchored over the central atlantic through the upcoming weekend. This will result in moderate easterly winds. A long dominant period northeasterly swell will continue to subside across the atlantic waters and passages overnight. A tropical wave is forecast to reach the eastern caribbean by early next week. This should bring an increase in the local trade winds and also the chance for Thunderstorms across the regional waters.

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 260135
afdsju
area forecast discussion
national weather service san juan pr
935 pm ast Thu may 25 2017

Update A few light showers persisted across western pr through
the early evening hours. While isolated showers from streamers
from the northern usvi made it inland across culebra and eastern
pr. Also, light trade wind showers were noted over the caribbean
waters and over portions of st. Croix. However, no significant
rainfall accumulation's were observed. Overall, fair weather
conditions should prevail overnight with a few showers moving from
time to time across the usvi eastern portions of pr. Minor changes
were made to short term grids.

Aviation MainlyVFR across all terminals through the forecast
period. Light trade wind showers could briefly affect the
leeward usvi eastern pr terminals through early Friday morning.

Hz due to saharan dust will continue but vsby p6sm. Latest 26 00z
tjsj upper air sounding indicated E winds below fl100 at 7-20
kts... Bcmg N above.

Marine No change from previous discussion. High rip current
risk continues overnight across the northwest to north central
coast of pr. Moderate risk of rip currents expected on Friday
across much of the beaches of the islands.

Prev discussion issued 449 pm ast Thu may 25 2017
short term... Today through Saturday...

mostly sunny and hazy skies prevailed across the region once again
today. Only a few light showers were noted over the west interior
of puerto rico during the late afternoon hours. However, the activity
was of short duration. Expect mostly clear skies during the overnight
hours with little or no measurable precipitation expected across the
forecast area.

A very dry and stable airmass will continue to dominate the local
region for the next few days as a strong low to mid level ridge
will dominate the region. Saharan dust will continue across the
region during the rest of the evening but lesser concentrations is
expected during the next few days. An east to southeast wind flow
will prevail through Saturday promoting near or slightly above normal
temperatures along the northern slopes of puerto rico. Elsewhere temperatures
will be near normal. On Friday, the upper level ridge will gradually
erode allowing for a slight increase in low level moisture transport
through Saturday. This should allow a better chance for early morning
showers followed by some afternoon showers and possibly isolated thunderstorm
development mainly over the interior and west sections of puerto rico.

Long term... Sunday through Friday...

an upper level low and an associated trough just east northeast of the
region is forecast to retrogress north northwest across the area
while weakening Sunday through Monday. However, another short wave
trough is expected to develop and move across the southwestern atlantic
and reinforce the previously mentioned lingering trough. Surface
high pressure across the central atlantic is forecast to maintain
moderate trade winds across the region through early. However,
winds are to become east to northeast by mid week and once again
east southeast for the rest of the period. All in all, expect
relatively dry weather pattern across the local islands during
most of the weekend with typical diurnally and locally induced
afternoon convection mainly over parts of the interior and west
sections of puerto rico. A tropical wave is still forecast to
approach to the lesser antilles Sunday and Monday and move across
the eastern caribbean Tuesday through Wednesday. This feature in
combination with the proximity of an upper trough should bring an
increase in tropical moisture transport and consequently increase
the chance for showers and thunderstorms over the local islands
and surrounding waters early next week.

Aviation... Suspended saharan dust will result in slight hz with
slant vsby btwn 6-9 nm durg prd. Some shra -shra are possible in
the vcty of tjmz btwn 25 18-23z, thenVFR conditions will prevail
during the next 24 hours. Surface winds e-ese at 10-20 knots with
higher gusts. Light and variable overnight.

Marine... A northerly swell at 3 to 5 feet continued to move across
the local atlantic waters. This swell will continue to subside
during the rest of the evening hours. The nearshore buoys
continued to suggests easterly winds at 15 to 20 knots. Mariners
can therefore expect seas between 3 and 6 feet and winds at 15
knots or less.

Preliminary point temps pops
Sju 78 89 77 89 10 40 40 40
stt 78 87 77 88 10 40 40 40

Sju watches warnings advisories
Pr... High rip current risk until 6 am ast Friday for north central-
northwest-western interior.

Vi... None.

Am... None.

Short term... Ds
long term... .Ram


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SJNP4 - 9755371 - San Juan, PR 11 mi37 min SE 6 G 7 80°F 82°F1016.8 hPa
41053 - San Juan, PR 12 mi85 min ESE 7.8 G 9.7 80°F 81°F4 ft1016.4 hPa (-0.9)
JOXP4 - Jobos Bay Reserve, Puerto Rico 25 mi100 min NNW 1.9 76°F 1017 hPa69°F
YABP4 - 9754228 - Yabucoa Harbor, PR 25 mi37 min ENE 4.1 G 8
FRDP4 - 9753216 - Fajardo, PR 29 mi37 min E 9.9 G 12 80°F 72°F
AROP4 - 9757809 - Arecibo, PR 30 mi37 min S 2.9 G 2.9 76°F
42085 - Southeast of Ponce, PR 36 mi55 min ENE 12 G 16 82°F 1015.5 hPa
41056 38 mi55 min ENE 12 G 14 81°F 1016.2 hPa
VQSP4 - 9752619 - Isabel Segunda, Vieques, PR 40 mi37 min ESE 4.1 G 7 80°F
ESPP4 - 9752695 - Esperanza, PR 40 mi37 min NE 1.9 G 5.1 77°F 83°F1016.1 hPa
CLBP4 - 9752235 - Culebra, PR 47 mi37 min 79°F 83°F1016.3 hPa

Wind History for San Juan, PR
(wind in knots)    EDIT      (on/off)   Help
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SE9
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E10
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G18

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Juan, Luis Munoz Marin International Airport, PR1343 mi89 minESE 310.00 miA Few Clouds79°F71°F79%1016.9 hPa

Wind History from JSJ (wind in knots)
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Last 24hrE4E6E6E4E8E9E10NE15NE15E16E18E16NE18
G23
NE16E13E13E10E11E13E11E7E5SE3SE4
1 day agoE7E10E8E8E10E9E15
G22
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G21
E8
G17
E17SE8SE9
G17
E13E10E9E7E10E4E9SE4E3E4E7E5
2 days agoSE3E5SE3SE3E7E9E13NE14NE16NE16E16E17
G22
E16E16E15E11E8E8E8E7E9E6E7E5

Tide / Current Tables for San Juan, La Puntilla, San Juan Bay, Puerto Rico
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San Juan
Click for Map
Fri -- 03:50 AM AST     0.18 feet Low Tide
Fri -- 05:47 AM AST     Sunrise
Fri -- 06:38 AM AST     Moonrise
Fri -- 08:48 AM AST     0.93 feet High Tide
Fri -- 02:56 PM AST     -0.45 feet Low Tide
Fri -- 06:55 PM AST     Sunset
Fri -- 08:00 PM AST     Moonset
Fri -- 10:08 PM AST     1.95 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.20.80.50.20.20.30.50.70.90.90.80.60.2-0.1-0.4-0.4-0.3-00.511.51.821.9

Tide / Current Tables for San Juan, Puerto Rico
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San Juan
Click for Map
Fri -- 03:49 AM AST     0.19 feet Low Tide
Fri -- 05:47 AM AST     Sunrise
Fri -- 06:38 AM AST     Moonrise
Fri -- 08:49 AM AST     0.95 feet High Tide
Fri -- 02:56 PM AST     -0.43 feet Low Tide
Fri -- 06:55 PM AST     Sunset
Fri -- 08:00 PM AST     Moonset
Fri -- 10:08 PM AST     1.97 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.20.80.50.30.20.30.50.70.90.90.80.60.3-0.1-0.3-0.4-0.300.511.51.821.9

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 (3,6,7,8)
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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.