Tuesday, January22, 2019 L-36.com


Marine Weather and Tides
Cata�o, 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 6:58AMSunset 6:13PM Tuesday January 22, 2019 1:52 AM AST (05:52 UTC) Moonrise 8:01PMMoonset 8:15AM 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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AMZ712 Coastal Waters Of Northern Puerto Rico Out 10 Nm- 856 Pm Ast Mon Jan 21 2019
Rest of tonight..East winds 5 to 10 knots. Seas 1 to 3 feet. Dominant period 7 seconds. Scattered showers.
Tuesday..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 11 seconds. Northwest swell around 4 feet in the afternoon. Scattered showers.
Tuesday night..East winds 10 to 15 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 10 seconds. Northwest swell around 4 feet. Scattered showers.
Wednesday..East winds 15 to 20 knots. Seas 6 to 8 feet with occasional seas up to 10 feet. Dominant period 8 seconds. Northwest swell around 4 feet in the afternoon. Scattered showers.
Wednesday night..East winds 15 to 20 knots. Seas 8 to 10 feet with occasional seas up to 13 feet. Dominant period 9 seconds. Northwest swell 4 to 5 feet. Numerous showers.
Thursday..East winds 15 to 20 knots. Seas 8 to 10 feet with occasional seas up to 11 feet. Dominant period 9 seconds. East swell 4 to 5 feet. Scattered showers.
Friday..East winds 10 to 15 knots. Seas 5 to 7 feet with occasional seas up to 9 feet. Dominant period 9 seconds. Isolated showers.
Saturday..East winds 5 to 10 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 9 seconds. Isolated showers.
AMZ700 856 Pm Ast Mon Jan 21 2019
Synopsis for puerto rico and the uS. Virgin islands waters... High pressure is building behind a front extending from low pressure off the newfoundland coast to the windward passage. As the high builds into the western atlantic, it will increase the winds across the local area tonight through Wednesday night making conditions hazardous. Although the front is not expected to move past the local outer atlantic waters, a pre-frontal trough will bring scattered to numerous showers to the local waters. Winds will diminish beginning on Thursday.


7 Day Forecast for Marine Location Near Cata?o, PR
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location: 18.46, -66.12     debug


Area Discussion for - San Juan, PR
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Fxca62 tjsj 220112
afdsju
area forecast discussion
national weather service san juan pr
912 pm ast Mon jan 21 2019

Update
Showers developed across portions of eastern, and interior areas
of puerto rico this afternoon. This activity developed as a result
of increasing low-level moisture, and moderate trade winds.

Rainfall accumulations were less than a tenth of an inch across
most areas, this was due to the showers fast forward speed, as
well as, the lack of upper level instability. The goes-16 water
vapor shows an area of dry air moving into the eastern areas of
puerto rico, this will cause showers to dissipate over the next
several hours. Behind the dry air there's a patch of moisture
that is currently positioned to the east of culebra, this area of
moisture will continue to progress to the west and move into the
eastern areas of puerto rico late tonight, and into the morning.

Showers are forecast to form over the u.S. Virgin islands, and
eastern areas of puerto rico later tonight until the early morning
hours on Tuesday.

Aviation
Vrf conds will continue to prevail with the possibility of iso
shra across terminals tist, tisx, tjsj now until 22 12z. Sfc winds
are out of the east to southeast at 5 to 10 kts, then becoming
east to northeast around 22 12z. Some alto CU around 010 to 012
kft through the overnight.

Marine
Marine conditions are forecast to become hazardous later this
week as a result of an invading northerly swell, and increasing
east to northeast winds of 20 to 25 mph. Seas will increase during
the afternoon on Wednesday through Thursday morning. Tomorrow
seas are forecast to range from 4 to 6 feet across the atlantic
waters, while seas will be 3 to 5 feet elsewhere.

Prev discussion issued 521 pm ast Mon jan 21 2019
synopsis... A pre-frontal trough will move through the area on
Wednesday and moisture will linger until Thursday as it nestles up
against the cold front that will remain just north of the area.

Then drying will occur through Saturday morning. Low level
moisture from a distant low to the east northeast will bring
increasing moisture and scattered shallow showers mainly in the
east and around the u.S. Virgin islands after Saturday.

Short term... Tonight through Thursday...

two almost equally strong high pressure systems are lodged on
either side of a moderately strong low moving across the coast of
newfoundland with a cold front trailing across the southern end of
the bahama islands. The high over the state of ohio will move into
the western atlantic on Tuesday night. This will force a pre-
frontal trough across the islands. The proximity of that 1035 mb
high will increase the low level wind flow across the area to 20
to 30 mph from the east northeast Tuesday night and Wednesday.

This situation will also favor many rapidly passing showers over
the northeast coast and mountains of puerto rico and to a lesser
extend the northern u.S. Virgin islands, with some showers
possible in saint croix. As the high migrates to the east, the
main frontal boundary will drape into the local outer atlantic
waters Wednesday night and Thursday to continue a cool showery
period-- mainly in the u.S. Virgin islands and eastern and central
puerto rico. At mid levels high pressure dominates the area
beyond Thursday. At upper levels westerly flow becomes more
northwest during the period as a ridge reforms from colombia to
eastern cuba and approaches the forecast area. Little or no
moisture will be seen above 12 kft, so all showers will be
relatively shallow.

Long term... Friday through Monday...

high pressure aloft does finally arrive on Friday and slowly
moves into the leeward islands by Monday. The very dry air of mid
levels remains as does the high pressure at 500 mb. As high
pressure at the surface through 700 mb continues northeast of the
area through Monday, patchy moisture will become more prevalent.

On Saturday moisture at 850 mb will move out of a distant low to
the east northeast but remain too shallow for significant
convection. Hence, expect scattered showers after Saturday with
only a little accumulation--mainly where mountains meet the
prevailing easterly flow.

Aviation... Light shra will continue to develop along the
west northwest quadrant of pr butVFR conds are expected to
prevail at all pr TAF sites. Scattered showers between the
leeward usvi terminals could also result in tempo MVFR cigs. Low
level winds expected to continue from the east around 10 kt or
less overnight. Maximum winds increasing to become 70-80 kt
between fl390-490 from the west.

Marine... A northwesterly swell will begin moving into the area on
Tuesday, resulting in small craft advisories by early Wednesday
for 7 foot plus seas. Winds will also begin to increase and will
be at small craft advisory levels in their own right by Wednesday
night. Seas could reach 12 feet in the local outer atlantic
waters by Wednesday night. Small craft advisory conditions should
subside from the outer atlantic waters on Saturday.

Preliminary point temps pops
Sju 85 73 83 73 20 50 50 60
stt 83 73 83 73 30 30 20 40

Sju watches warnings advisories
Pr... None.

Vi... None.

Am... Small craft advisory from 2 am Wednesday to 8 am ast Saturday
for atlantic waters of puerto rico and usvi from 10 nm to
19.5n.

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


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SJNP4 - 9755371 - San Juan, PR 0 mi58 min SE 5.1 G 5.1 76°F 80°F1019.4 hPa
41053 - San Juan, PR 1 mi52 min SE 3.9 G 5.8 77°F 80°F3 ft1018.5 hPa (-0.3)
AROP4 - 9757809 - Arecibo, PR 31 mi52 min ESE 2.9 G 2.9
YABP4 - 9754228 - Yabucoa Harbor, PR 32 mi52 min 72°F 70°F
JOXP4 - Jobos Bay Reserve, Puerto Rico 35 mi67 min N 1 74°F 1020 hPa67°F
41056 37 mi52 min ENE 7.8 G 9.7 78°F 80°F1018.4 hPa (+0.0)
ESPP4 - 9752695 - Esperanza, PR 43 mi58 min NNE 1.9 G 4.1 73°F 80°F1018.9 hPa
CLBP4 - 9752235 - Culebra, PR 45 mi52 min 75°F 81°F1019.3 hPa (+0.0)
42085 - Southeast of Ponce, PR 47 mi112 min NNE 7.8 G 9.7 80°F 79°F3 ft1018.2 hPa (+0.4)

Wind History for San Juan, PR
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Airport Reports
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Tide / Current Tables for San Juan, La Puntilla, San Juan Bay, Puerto Rico
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


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 -- 03:29 AM AST     -0.26 feet Low Tide
Tue -- 06:59 AM AST     Sunrise
Tue -- 08:13 AM AST     Moonset
Tue -- 10:42 AM AST     1.65 feet High Tide
Tue -- 05:09 PM AST     0.35 feet Low Tide
Tue -- 06:12 PM AST     Sunset
Tue -- 08:00 PM AST     Moonrise
Tue -- 10:09 PM AST     0.95 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40.2-0.1-0.2-0.2-0.10.30.71.11.41.61.61.51.30.90.60.40.30.40.50.70.910.9

Weather Map and Satellite Images
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wmap_A
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.
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Wind Forecast for (0,6,7,8)
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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.