Saturday, March17, 2018

Marine Weather and Tides
Puerto Real, PR

Version 3.4
What's New / NOTES
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.
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.

Sunrise 6:33AMSunset 6:40PM Saturday March 17, 2018 10:09 AM AST (14:09 UTC) Moonrise 6:45AMMoonset 6:57PM Illumination 0% 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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AMZ745 Coastal Waters Of Southwestern Puerto Rico Out 10 Nm- 413 Am Ast Sat Mar 17 2018
Today..Southeast winds 5 to 10 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Northwest swell around 4 feet.
Tonight..East winds 5 to 10 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Northwest swell around 4 feet in the evening.
Sunday..Southeast winds 5 to 10 knots veering south in the afternoon. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds.
Sunday night..Northeast winds 5 to 10 knots. Seas 1 to 3 feet. Dominant period 10 seconds. Isolated showers.
Monday..East winds 5 to 10 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Isolated showers.
Tuesday..East winds 5 to 10 knots. Seas 1 to 3 feet. Dominant period 9 seconds. Isolated showers.
Wednesday..East winds 10 to 15 knots. Seas 1 to 3 feet. Dominant period 8 seconds. Isolated showers.
AMZ700 413 Am Ast Sat Mar 17 2018
Synopsis for puerto rico and the uS. Virgin islands waters... A fading northerly swell will continue to dissipate over the atlantic waters and Mona passage through Sunday. The surface high pressure northeast of the region will continue to produce a gentle to moderate southeasterly wind flow through early Sunday. A frontal boundary will stall north of the region before dissipating on Sunday.

7 Day Forecast for Marine Location Near Puerto Real, PR
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location: 18.08, -67.18     debug

Area Discussion for - San Juan, PR
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Fxca62 tjsj 170849
area forecast discussion
national weather service san juan pr
449 am ast Sat mar 17 2018

Synopsis Drier weather will prevail over the next several days
with a possibility for an isolated shower across northwest puerto
rico today and Sunday. The next weather maker will be a cold
front that will move off the east coast of the united states on
Wednesday with the front nearing the islands next Saturday.

Short term... Today through Monday...

weak high pressure at the surface rests just north of the bahamas
and will drift to north of the local area at 25 north. Clouds from a
shearline drape across hispaniola and stretch northeast into the
cold front about 375 miles north of san juan. This cloudy area
should remain just northwest of the forecast area through 18 03z and
then blow through to the caribbean waters on northwest flow at 700
mb. By Sunday night. Yesterday no stations reported rainfall except
maricao with 0.03 inches. Our forecast area remains under this same
relatively dry air mass--due to the proximity of the front. Also
the 17 00z relative humidity was over forecasted over the area by
the gfs. Therefore, based on model performance yesterday which
had areas of very high pops during the afternoon over northwest
puerto rico, (hi-res models) and a general area of higher pops
(gfs) over central puerto rico, and model output today, which
continues to develop very high pops over the western coast (hi-
res) and nearly 100 percent pops just east of the center of puerto
rico (gfs) am greatly limiting expectations to around 30 percent.

(tool rounding may show a different field than forecast.) do
consider that weak moisture increases could lead to more shower
development today than yesterday, but it should be limited due to
dry mid layers.

This consideration will play into the forecast for Sunday also,
except that the model is bringing the clouds associated with the
shearline through and moisture is forecast to be higher. Also the
presence of an upper level jet entrance just north of the area
should enhance shower activity over the area. Current indications
suggest that the front may not break through the area as modeled so
have scaled back the precipitation forecast somewhat while allowing
the area affected to expand. As the surface flow turns more easterly
from Sunday to Monday we will see a more typical distribution of
precipitation should moisture move through as expected. Hence on
Sunday night and Monday morning scattered showers are expected on
the eastern slopes of puerto rico with isolated showers in the u.S.

Virgin islands, followed by some convection over the inland portion
of western puerto rico in the afternoon with little shower activity
in the u.S. Virgin islands.

Long term Tuesday through Sunday... A surface and mid level
ridge of high pressure will create quiet conditions during the
beginning of the long term period.

Wednesday, a cold front will move off the east coast of the
united states and will continue to move south into the atlantic
waters. Ahead of the front east southeast winds will pull moist
air over puerto rico and the u.S. Virgin islands with scattered
showers across northwest, central and southwestern portion of
puerto rico through Friday.

Saturday, the front will be to the northwest of puerto but with
southerly moist flow combining with orographic lift will create
showers across the offshore waters.

Sunday, a diffuse front moves over puerto rico bringing moisture
across portions of northwest and northern puerto rico during the
afternoon this moisture will continue to spread east across
northeast puerto rico and the u.S. Virgin islands.

Aviation Vfr conds are expected to prevail through 18 12z. Some
shra are psbl in NW pr with MVFR conds and mtn obscurations from
17 17z thru 17 22z, but TAF sites may only be brushed by this if
affected. Sfc winds will be southeast 6-12 kt, sea breezes will
dominate aft 17 14z. Winds alf W 60-80 kt btwn fl310-510 winds incrg
thru 18 12z. Maximum winds fl410.

Marine Seas will range from 4 to 6 feet across the atlantic waters and mona
passage, and between 3 and 5 feet elsewhere. A high risk rip
currents risk is in effect for the northern beaches of puerto rico
until Sunday.

Preliminary point temps pops
Sju 89 74 87 74 10 10 20 20
stt 85 74 85 73 10 10 10 20

Sju watches warnings advisories
Pr... High rip current risk until 6 am ast early this morning for
culebra-north central-northeast-northwest-san juan and
vicinity-southeast-western interior.

Vi... None.

Am... None.

Short term... Ws
long term... .Tw

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MGIP4 - 9759110 - Magueyes Islands, PR 10 mi51 min S 5.1 G 11 81°F 80°F1017.5 hPa
PTRP4 20 mi39 min NE 2.9 G 7 84°F
41115 - Rincon, Puerto Rico (181) 21 mi39 min 80°F4 ft
AROP4 - 9757809 - Arecibo, PR 37 mi51 min SE 1 G 1.9
42085 - Southeast of Ponce, PR 38 mi69 min NE 5.8 G 7.8 80°F 80°F1016.6 hPa (+1.6)

Wind History for Mayaguez, PR
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1 day
2 days

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure

Wind History from JMZ (wind in knots)
Last 24hr----------------------------------------E6E5E8E9
1 day ago------------------------------------------------
2 days ago------------------------------------------------

Tide / Current Tables for Puerto Real, Puerto Rico
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Puerto Real
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Sat -- 02:16 AM AST     0.03 feet Low Tide
Sat -- 06:35 AM AST     Sunrise
Sat -- 06:44 AM AST     Moonrise
Sat -- 08:37 AM AST     0.95 feet High Tide
Sat -- 09:14 AM AST     New Moon
Sat -- 02:51 PM AST     0.15 feet Low Tide
Sat -- 06:39 PM AST     Sunset
Sat -- 06:57 PM AST     Moonset
Sat -- 08:43 PM AST     0.89 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Tide / Current Tables for Magueyes Island, Caribbean Sea, Puerto Rico
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Magueyes Island
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Sat -- 01:33 AM AST     0.06 feet Low Tide
Sat -- 06:34 AM AST     Sunrise
Sat -- 06:44 AM AST     Moonrise
Sat -- 09:06 AM AST     0.36 feet High Tide
Sat -- 09:14 AM AST     New Moon
Sat -- 03:51 PM AST     0.15 feet Low Tide
Sat -- 06:38 PM AST     Sunset
Sat -- 06:56 PM AST     Moonset
Sat -- 08:48 PM AST     0.22 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Weather Map and Satellite Images
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GOES Local Image of Puerto Rico    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
target = "new">Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for (10,2,3,4)
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Ground Weather Radar Station Puerto Rico,Virgin Islands
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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 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 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.