Tuesday, May23, 2017 L-36.com


Marine Weather and Tides
Lomas, PR

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 5:46AMSunset 6:54PM Tuesday May 23, 2017 4:55 AM AST (08:55 UTC) Moonrise 3:58AMMoonset 4:46PM Illumination 6% Phase: Waning Crescent; Moon at 27 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- 412 Am Ast Tue May 23 2017
.small craft should exercise caution...
Today..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Isolated showers.
Tonight..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Isolated showers.
Wednesday..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 5 feet in the afternoon. Isolated showers.
Wednesday night..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 5 feet. Isolated showers.
Thursday..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 10 seconds. North swell 4 to 5 feet. Isolated showers.
Friday..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 10 seconds. Northeast swell around 4 feet. Isolated showers.
Saturday..East winds 15 to 20 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Scattered showers.
AMZ700 412 Am Ast Tue May 23 2017
Synopsis for puerto rico and the uS. Virgin islands waters... A surface high pressure over the western atlantic will gradually build and expand eastward over the central atlantic by Wednesday. As a result...winds and seas are expected to slightly increase by Wednesday.

7 Day Forecast for Marine Location Near Lomas, PR
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location: 18.28, -65.93     debug


Area Discussion for - San Juan, PR
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Fxca62 tjsj 230813
afdsju
area forecast discussion
national weather service san juan pr
413 am ast Tue may 23 2017

Synopsis Mostly fair and stable weather conditions with high
concentrations of saharan dust particulates will continue across
the region for the next several days. A surface high across the
central atlantic will maintain an easterly trade wind flow across
the region for most of the forecast period. A wetter pattern is
possible early next week as a tropical wave moves across the
region.

Short term Today through Thursday...

partly cloudy skies prevailed across puerto rico and the u.S. Virgin
islands overnight. Doppler radar detected some light passing showers
mainly across the local waters. Some light passing showers can be
expected this morning, but overall dry and hazy conditions are
expected to prevail.

Model guidance suggests that saharan air layer is expected to
continue affecting the local region today. This will maintain hazy
skies and warmer than normal temperatures across the region for the
next several days. However, residual moisture will combine with
strong daytime heating, sea breeze convergence and mountains lifting
to induce a new round of showers and possible thunderstorms over
central interior, western and northwest puerto rico each afternoon.

Significant precipitation is not expected to affect the u.S. Virgin
islands.

Long term Friday through Wednesday...

an upper level ridge will remain as the main weather feature
across the northeast caribbean until at least Saturday. An upper
level low and an associated upper level trough is expected to
develop just to the east northeast of the region by the upcoming
weekend, eroding the upper ridge. However, the upper trough axis is
expected to remain to the east of the region maintaining the
local islands under the subsidence side of the trough. A surface
high pressure across the central atlantic is expected to produce a
moderate easterly trade winds across the region. Model guidance
also continue to indicated that a saharan air layer will persist
over the area through most of the forecast period resulting in
hazy, relatively dry and stable airmass over the northeast
caribbean into the upcoming weekend. A tropical wave along 40 west
this morning will continue to move westward approaching to the
lesser antilles on Monday an moving over the eastern caribbean on
Tuesday and across the local islands late Tuesday and Wednesday.

This feature will result in an increase in cloudiness, showers and
thunderstorms over the local islands and surrounding waters late
in the forecast period.

Aviation Vfr conditions will prevail across all TAF sites through
at least 23/16z. Vcsh can be expected across tjmz and tjbq with
mountain obscurations. Low level winds will be mainly southeast at
10 to 15 kts with higher gusts.

Marine High pressure over the central atlantic will increase
the trade winds across the surrounding waters, resulting in
posible seas building up to 6 feet across the atlantic waters by
midweek. Marine conditions will then gradually improve through the
weekend when seas subsiding to 2-4 feet across most of the
waters.

Preliminary point temps/pops
Sju 90 80 90 80 / 20 10 10 20
stt 89 80 90 80 / 20 10 10 20

Sju watches/warnings/advisories
Pr... None.

Vi... None.

Am... None.

Short term... Fc
long term... .Jf


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SJNP4 - 9755371 - San Juan, PR 16 mi44 min ESE 6 G 8.9 81°F 82°F1015.9 hPa
FRDP4 - 9753216 - Fajardo, PR 16 mi38 min E 7 G 8 80°F 74°F
YABP4 - 9754228 - Yabucoa Harbor, PR 16 mi38 min ENE 6 G 9.9
41053 - San Juan, PR 16 mi56 min E 9.7 G 12 81°F 81°F3 ft1015.2 hPa (-0.9)
41056 25 mi56 min E 12 G 14 81°F 82°F2 ft1015.5 hPa (-1.0)
VQSP4 - 9752619 - Isabel Segunda, Vieques, PR 27 mi38 min E 2.9 G 5.1 80°F
JOXP4 - Jobos Bay Reserve, Puerto Rico 27 mi71 min Calm 77°F 1016 hPa71°F
ESPP4 - 9752695 - Esperanza, PR 28 mi38 min ESE 7 G 12 81°F 83°F1015.6 hPa
CLBP4 - 9752235 - Culebra, PR 33 mi38 min 81°F 83°F1015.8 hPa
42085 - Southeast of Ponce, PR 43 mi56 min NE 9.7 G 14 82°F 83°F3 ft1014.4 hPa (-1.0)
AROP4 - 9757809 - Arecibo, PR 43 mi38 min SSE 4.1 G 5.1 74°F

Wind History for Fajardo, 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, PR11 mi60 minESE 39.00 miPartly Cloudy80°F73°F82%1015.8 hPa

Wind History from JSJ (wind in knots)
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Last 24hrE5E5SE3E7E11E10E12NE15NE13NE15
G22
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G23
E16E13E13E10E12E9E11E10E7E7E5SE3
1 day agoE5SE3E5E6E11NE11NE14NE14NE13NE15
G22
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G22
E15NE13NE14NE13E13NE13E10NE12E11E9E11E7E6
2 days agoE3E5E6E9NE10E12NE12NE14
G19
NE15NE15E17NE15
G20
E12NE11NE8NE9E11NE9E11E11E8E7E7E7

Tide / Current Tables for Boca De Cangrejos, Isla Verde, San Juan, Puerto Rico
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Boca De Cangrejos
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Tue -- 01:27 AM AST     0.37 feet Low Tide
Tue -- 03:58 AM AST     Moonrise
Tue -- 05:48 AM AST     Sunrise
Tue -- 06:46 AM AST     1.00 feet High Tide
Tue -- 01:05 PM AST     -0.09 feet Low Tide
Tue -- 04:46 PM AST     Moonset
Tue -- 06:53 PM AST     Sunset
Tue -- 08:05 PM AST     1.50 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.50.40.40.50.70.8110.90.70.50.2-0-0.1-00.20.50.91.21.41.51.41.31

Tide / Current Tables for Vieques Passage, Puerto Rico Current
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Vieques Passage
Click for Map
Tue -- 02:49 AM AST     -0.85 knots Max Ebb
Tue -- 03:57 AM AST     Moonrise
Tue -- 05:47 AM AST     Sunrise
Tue -- 06:26 AM AST     0.00 knots Slack
Tue -- 09:00 AM AST     0.48 knots Max Flood
Tue -- 11:42 AM AST     -0.00 knots Slack
Tue -- 02:42 PM AST     -0.58 knots Max Ebb
Tue -- 04:44 PM AST     Moonset
Tue -- 05:29 PM AST     0.00 knots Slack
Tue -- 06:51 PM AST     Sunset
Tue -- 09:00 PM AST     0.89 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.2-0.6-0.8-0.9-0.7-0.5-0.10.20.40.50.40.2-0.1-0.4-0.5-0.6-0.4-0.20.20.50.80.90.80.5

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 (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.