Wednesday, February20, 2019 L-36.com


Marine Weather and Tides
Isabela, PR

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 6:52AMSunset 6:32PM Wednesday February 20, 2019 7:51 PM AST (23:51 UTC) Moonrise 7:50PMMoonset 7:45AM Illumination 98% Phase: Waning Gibbous; Moon at 16 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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AMZ742 Coastal Waters Of Northwestern Puerto Rico Out 10 Nm- 515 Pm Ast Wed Feb 20 2019
.small craft should exercise caution...
Tonight..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 8 seconds. Isolated showers through the night.
Thursday..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 8 seconds. Isolated showers.
Thursday night..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 10 seconds. Isolated showers through the night.
Friday..East winds 20 to 25 knots becoming northeast in the afternoon. Seas 5 to 7 feet with occasional seas up to 9 feet. Dominant period 8 seconds. North swell around 4 feet in the afternoon. Isolated showers.
Friday night..East winds 20 to 25 knots. Seas 5 to 7 feet with occasional seas up to 9 feet. Dominant period 10 seconds. Northeast swell 4 to 5 feet. Isolated showers through the night.
Saturday..Northeast winds 20 to 25 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.
Sunday..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 11 seconds. Northeast swell around 4 feet. Isolated showers.
Monday..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.
AMZ700 515 Pm Ast Wed Feb 20 2019
Synopsis for puerto rico and the uS. Virgin islands waters... A surface high pressure moving across the western atlantic will establish and build north of the region, resulting in fresh to locally strong easterly wind through at least Friday. Under this wind flow, hazardous marine conditions are expected through the end of the week.


7 Day Forecast for Marine Location Near Isabela, PR
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location: 18.5, -67.01     debug


Area Discussion for - San Juan, PR
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Fxca62 tjsj 202145
afdsju
area forecast discussion
national weather service san juan pr
545 pm ast Wed feb 20 2019

Synopsis Fair weather conditions are expected to prevail
through most of the forecast period. However, occasional
fragments of low level moisture will bring isolated to scattered
shower activity into the forecast area, but the presence of a
ridge aloft will limit any chance for significant rainfall
accumulations. A migratory surface high pressure will bring
breezy conditions through the upcoming weekend.

Short term Tonight through Friday...

a strong surface high pressure moving over the western atlantic
will establish and build north of the region tonight through the
end of the short-term forecast period, resulting in breezy
conditions across the forecast area under an east to east
northeast wind flow between 15 and 25 mph with higher gusts.

Within this flow, satellite imagery suggest that fragments of low-
level moisture accompanied by cloud clusters and showers will
continue to move in tonight, enhancing shower activity across the
forecast area. Model suggests that a pocket of relatively drier
air will decrease moisture content over the region and thus,
reduce the chance for showers on Thursday. However, an increase in
shower activity is expected on Friday as another round of low-
level moisture fragments, associated to the remnants of a frontal
boundary, moves over the area. So far, significant rainfall
accumulations are not expected since a ridge aloft will suppress
the development of deep convection through the entire short-term
forecast period.

Long term Saturday through Thursday...

Prev discussion issued 657 am ast Wed feb 20 2019
forecast soundings continues to suggest dry air at mid levels,
but enough low level moisture to result in trade wind showers from
time to time. Although a stable weather pattern will persist
during the long term, model guidance suggested an increase of low
level moisture and wind surface convergence late in the forecast
period. If this pattern holds, frequent patches of clouds and
quick passing showers could be expected Tuesday through Thursday.

However, confidence is low due to the amount of uncertainty
associated with the end of the forecast cycle.

Aviation MainlyVFR conditions are expected across the terminals
throughout the period. However, trade wind showers and sct to bkn
cigs btw 030 to 060 fl will continue through 21 02z. Vcsh -shra
should diminish by 21 03z with some sct to bkn skies still remaining
over the terminals. Sfc winds will be out of the east ranging from
15 to 20 kts through 21 18z.

Marine Hazardous marine conditions continue across most of the
regional waters. As a result, small craft advisories continue in
effect due to seas between 5 and 7 feet, increasing up to 8 feet
by late Thursday night. For the nearshore atlantic waters and
coastal waters west of puerto rico, mariners are urged to exercise
caution due to seas up to 6 feet through at least Thursday
evening, before seas increase above small craft advisory criteria
across the nearshore atlantic waters. As the surface high
pressure continues to build north of the region, easterly winds
ranging between 15 and 20 knots are expected to prevail,
increasing up to 25 knots by late Thursday night into Friday.

Along with hazardous marine conditions, a moderate risk of rip
currents will continue for most of the local beaches tonight,
and progressively elevating to high starting on Thursday morning.

First along beaches of saint croix and the north coast of puerto
rico on Thursday, and then for beaches along the north coast of
culebra and saint thomas by Friday.

Preliminary point temps pops
Sju 83 73 84 74 40 20 20 40
stt 84 73 84 75 40 20 20 40

Sju watches warnings advisories
Pr... High rip current risk from Thursday evening through late Friday
night for north central-northeast-northwest-san juan and
vicinity-southeast.

High rip current risk from Friday morning through late Friday
night for culebra.

Vi... High rip current risk from Thursday morning through late Friday
night for st croix.

High rip current risk from Friday evening through late Friday
night for st.Thomas... St. John... And adjacent islands.

Am... Small craft advisory until 6 am ast Saturday 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 southern puerto rico out 10 nm-
coastal waters of southern usvi vieques and eastern puerto
rico out 10 nm-mona passage southward to 17n.

Small craft advisory from 6 pm Thursday to 6 am ast Saturday for
coastal waters of northern puerto rico out 10 nm-coastal
waters of northern usvi and culebra out 10 nm.

Short term... Tw
long term... .Icp
aviation... ..Tw


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
AROP4 - 9757809 - Arecibo, PR 16 mi52 min E 8 G 11
PTRP4 16 mi37 min ENE 7 G 15 76°F
41115 - Rincon, Puerto Rico (181) 17 mi52 min 80°F3 ft
MGZP4 - 9759394 - Mayaguez, PR 21 mi58 min 76°F 81°F1017.6 hPa
MGIP4 - 9759110 - Magueyes Islands, PR 37 mi52 min ESE 5.1 G 8.9 79°F 79°F1017.4 hPa (+0.3)
SJNP4 - 9755371 - San Juan, PR 47 mi58 min E 12 G 17 78°F 79°F1018.4 hPa
41053 - San Juan, PR 48 mi52 min E 18 G 21 79°F 79°F5 ft1017.5 hPa (-0.0)

Wind History for Arecibo, PR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Aquadilla, Rafael Hernandez Airport, PR6 mi62 minE 1010.00 miPartly Cloudy73°F0°F%1018.6 hPa

Wind History from JBQ (wind in knots)
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Last 24hrE13E9E9E6E4------------SE4E6E7E9E12E16
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1 day agoE12
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E9E7--------------SE5E3E9
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2 days agoS6--CalmCalmCalm------------SE4SE4E8E14
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Tide / Current Tables for Mayaguez, Puerto Rico
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Mayaguez
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Wed -- 02:42 AM AST     -0.39 feet Low Tide
Wed -- 06:53 AM AST     Sunrise
Wed -- 07:45 AM AST     Moonset
Wed -- 09:25 AM AST     1.69 feet High Tide
Wed -- 03:51 PM AST     0.13 feet Low Tide
Wed -- 06:31 PM AST     Sunset
Wed -- 07:50 PM AST     Moonrise
Wed -- 09:18 PM AST     1.24 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.2-0.1-0.3-0.4-0.20.10.61.11.51.71.71.51.10.80.40.20.10.20.50.81.11.21.21

Tide / Current Tables for Puerto Real, Puerto Rico
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Puerto Real
Click for Map
Wed -- 02:37 AM AST     -0.28 feet Low Tide
Wed -- 06:53 AM AST     Sunrise
Wed -- 07:45 AM AST     Moonset
Wed -- 09:22 AM AST     1.23 feet High Tide
Wed -- 03:46 PM AST     0.09 feet Low Tide
Wed -- 06:31 PM AST     Sunset
Wed -- 07:50 PM AST     Moonrise
Wed -- 09:15 PM AST     0.90 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.1-0.1-0.3-0.3-0.10.10.50.81.11.21.21.10.80.50.30.10.10.20.40.60.80.90.90.7

Weather Map and Satellite Images
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wmap_A
GOES Local Image of    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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for (18,4,5,8)
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Ground Weather Radar Station Puerto Rico,Virgin Islands
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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.