Monday, July22, 2019 L-36.com


Marine Weather and Tides
Carolina, PR

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6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 5:57AMSunset 7:03PM Monday July 22, 2019 6:34 PM AST (22:34 UTC) Moonrise 11:03PMMoonset 10:34AM Illumination 67% Phase: Waning Gibbous; Moon at 21 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- 312 Pm Ast Mon Jul 22 2019
.small craft should exercise caution...
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 through the night.
Tuesday..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Isolated Thunderstorms through the day. Scattered showers in the afternoon.
Tuesday night..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 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Isolated showers.
Wednesday night..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Isolated showers.
Thursday..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 7 seconds. Isolated Thunderstorms. Scattered showers.
Friday..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 7 seconds. Isolated Thunderstorms. Scattered showers.
Saturday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 8 seconds. Isolated showers.
AMZ700 312 Pm Ast Mon Jul 22 2019
Synopsis for puerto rico and the uS. Virgin islands waters... A surface high pressure north of the area will yield a moderate easterly wind flow through much of the work week. A tropical wave will continue to move across the area, resulting in passing showers with isolated Thunderstorms across the local waters through tomorrow, with drier and calmer weather for Wednesday.


7 Day Forecast for Marine Location Near Carolina, PR
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location: 18.46, -65.99     debug


Area Discussion for - San Juan, PR
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Fxca62 tjsj 222000
afdsju
area forecast discussion
national weather service san juan pr
400 pm ast Mon jul 22 2019

Synopsis
Several chances for showers and thunderstorms exist over the next
week across puerto rico and the surrounding region. Moisture from
our most recent tropical wave lingers into tomorrow, giving rise
to more shower activity. Drier air and hazy conditions are
expected briefly for Wednesday before another tropical wave
arrives Thursday, with lingering moisture from the wave lasting
the rest of the week. Additionally, saharan dust looks to return
for the weekend.

Short term Tonight through Wednesday...

moisture from an exiting tropical wave plus surface heating and
subsequent convergent effects have resulted in showers and even a
few vigorous thunderstorms this afternoon across puerto rico. Most
of this activity will slow down into the early evening, but
scattered showers are still expected across the region through the
nighttime hours. The highest probabilities for showers tonight
will be for eastern puerto rico.

There will still be plenty of leftover moisture to work with
tomorrow to produce showers and some thunderstorms, with
precipitable water values expected to be slightly above average at
1.7 to 1.9. Furthermore, an upper level trough will be moving to
our west for tomorrow, putting puerto rico and surrounding islands
in a more favorable position for enhanced shower activity through
dynamically induced upward motion. However, faster low-level
winds tomorrow are expected, with model soundings suggesting east-
southeasterly winds at roughly 20-25 knots in the 900 to 700 mb
layer. Thus, showers and thunderstorms are still likely across the
region tomorrow, especially for northwestern puerto rico tomorrow
afternoon. However, the faster winds will keep the showers moving
along, and push a greater portion of the areas of convergence and
shower activity offshore.

Before the next tropical wave arrives on Thursday, a brief period of
drier air and saharan dust is expected for Wednesday. The upper
tropospheric trough fills in a bit and moves even further
westward, thus becoming a non-factor. Therefore, hazy conditions
are expected with a smaller threat for showers, though showers are
still possible for western puerto rico in the afternoon.

Long term Thursday through Tuesday...

From previous discussion Issued 527 am ast Mon jul 22 2019
the beginning of the long-term period will be relatively quiet with
several tropical waves moving across puerto rico and adjacent
islands. The first tropical wave is progged to push into the
caribbean waters early Thursday morning and move over the islands
east of puerto rico during the afternoon. Then the western areas of
puerto rico during the peak of the afternoon. Although the leading
edge of the wave will move west of the area on Thursday evening; the
back edge of the tropical wave will move across puerto rico early
Friday. The moisture is expected to linger through Saturday
before slowing filtering out of the region. The increase in low-
level moisture during the end of the work week coupled with
significant surface heating, and sea breeze convergence will lead
to the development of scattered to isolated thunderstorms during
the afternoon. This activity will mainly develop across the
western and interior areas of puerto rico. However, showers and
isolated thunderstorms could develop across the eastern areas of
puerto rico, and adjacent islands during the afternoon too.

Additionally, recent guidance shows upper-level conditions becoming
more favorable for widespread showers and isolated thunderstorms on
Friday and Saturday as a result of a tutt low that is progged to
retrograde across the puerto rico. Also, an increase in upper-
level divergence will enhance upper-level instability across
portions of western and interior areas of puerto rico. However,
one caveat that could limit the development of widespread showers
and isolated thunderstorms, is the drier air that is expected in
the mid to upper levels of the atmosphere. Additionally,
the drier air will be accompanied by saharan dust, which will
also limit the vertical development of showers during the
afternoon. Still with the drier air in place 500 mb temperatures
are forecast to range from -8 to -10 celsius.

Sunday, the bulk of the moisture moves west of puerto rico, however,
some moisture is expected to linger across the islands through
early Monday morning. Then a drier air mass will move into the
region from the east, and limit shower activity later on Monday
and into Tuesday.

Aviation
Brief periods of MVFR conds will remain possible through 22 22z
in shra tsra at jsj jbq and jbq. ElsewhereVFR to continue. Vcsh
likely at leeward sites overnight. Ese winds at around 15 knots
with sea breezes, becoming at around 10 knots after 22z.

Marine
High pressure to the north will continue to drive easterly winds
at 10-20 knots for the next several days, with seas primarily at
3-5 ft. Small craft operators should exercise caution. Isolated
showers are possible across the region overnight and into
tomorrow, with heavy rain and some lightning possible. A moderate
risk for rip currents exists for most regional beaches over the
next few days.

Preliminary point temps pops
Sju 79 91 79 90 60 60 30 20
stt 81 92 79 91 60 30 30 20

Sju watches warnings advisories
Pr... None.

Vi... None.

Am... None.

Short term... Gl
long term... .Mb


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
41053 - San Juan, PR 6 mi65 min E 16 G 19 84°F 1014.4 hPa
SJNP4 - 9755371 - San Juan, PR 7 mi47 min E 16 G 18 84°F 85°F1015.5 hPa
YABP4 - 9754228 - Yabucoa Harbor, PR 29 mi47 min 87°F 75°F
41056 31 mi65 min E 12 G 16 84°F 1014.7 hPa
ESPP4 - 9752695 - Esperanza, PR 37 mi47 min E 9.9 G 14 86°F 86°F1015.9 hPa
JOXP4 - Jobos Bay Reserve, Puerto Rico 37 mi110 min E 5.1 88°F 1016 hPa73°F
AROP4 - 9757809 - Arecibo, PR 38 mi47 min SE 4.1 G 5.1
CLBP4 - 9752235 - Culebra, PR 38 mi53 min 88°F 87°F1015.9 hPa

Wind History for San Juan, PR
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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Tide / Current Tables for Boca De Cangrejos, Isla Verde, San Juan, Puerto Rico
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Boca De Cangrejos
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Mon -- 12:55 AM AST     1.23 feet High Tide
Mon -- 05:58 AM AST     Sunrise
Mon -- 07:25 AM AST     0.32 feet Low Tide
Mon -- 10:34 AM AST     Moonset
Mon -- 01:10 PM AST     0.92 feet High Tide
Mon -- 07:00 PM AST     0.31 feet Low Tide
Mon -- 07:02 PM AST     Sunset
Mon -- 11:03 PM AST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.21.21.210.80.60.40.30.30.40.60.70.90.90.90.80.60.50.40.30.40.50.70.9

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.


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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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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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.