Marine Weather and Tides
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 6:23AM||Sunset 5:29PM||Wednesday January 23, 2019 4:23 AM EST (09:23 UTC)||Moonrise 9:26PM||Moonset 9:34AM||Illumination 94%|
7 Day Forecast for Marine Location Near Aguadilla, PRHourly EDIT Help
Area Discussion for - San Juan, PR  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxca62 tjsj 230921|
area forecast discussion
national weather service san juan pr
521 am ast Wed jan 23 2019
Synopsis Surface high pressure across the western atlantic will
help promote moderate to strong winds from the northeast across
the local waters, usvi and the northern and eastern coastal
sections of pr. Fragments of moisture are expected to bring
passing showers to the east and north sections of pr as well as
the usvi. The marine conditions will continue to deteriorate
as the day progresses.
Short term Today through Friday...
a surface high pressure now moving over the western atlantic will
continue to promote a fresh to strong east to northeast wind flow
across the region today, shifting from the east late today through
the end of the workweek as this feature continues to move eastward
into the north central atlantic. At the same time, moisture
associated to a pre-frontal trough will persist over the forecast
area, decreasing late Thursday into Friday as the frontal boundary
recedes to the northeast while it dissipates. This combination will
promote trade wind showers streaming over the waters into windward
areas during the overnight and early morning hours. As the day
progresses and the land breeze effect diminishes, these showers will
move further inland into portions of the interior of the island.
Cloud cover will also increase throughout the day, limiting any
convective development. However, streamer-like showers are still
possible, particularly downwind from the local islands and along the
northern slopes of puerto rico. A similar weather pattern is
expected on Thursday with a decrease in shower activity and cloud
coverage as moisture and winds diminishes. In turn, this will allow
for convective development over the interior and western puerto rico
on Thursday and Friday afternoon. Nevertheless, rainfall
accumulations will remain minimal due to the presence of a mid to
upper level ridge that will continue to dominate the region through
the short-term period.
Long term Saturday through Thursday...
there has been little change in the long term forecast, and it
still looks like mainly fair weather with brief showers are to be
expected this weekend and early next week. The latest guidance is
suggesting that the available moisture will be drier than normal
in the long term, and any available moisture will be limited to
the lower levels. The winds are expected to be generally from the
east at around 10 to 15 mph, occasionally to 20 mph in gusts
across the coastal areas. The upper levels will be strongly
influenced by a broad ridge, and a broad ridge is expected at the
mid levels as well. This setup shall promote a fairly stable
atmosphere, allowing for mainly brief passing showers in the
morning and night time hours while limiting the intensity and
coverage of the afternoon convection.
Aviation MainlyVFR conditions expected to prevail across all
terminals through the forecast period with occasional trade wind
showers moving across the region. Thus, vcsh conditions expected at
tjsj, tjbq, tist, tisx, tncm and tkpk through 23 22z. Trade winds
showers will move further inland between 23 14z and 23 22z,
resulting in vcsh at tjmz and tjps. Low level e-ene winds between
15- 20 knots with gusts of 20-30 knots are expected.
Marine The marine conditions will continue to deteriorate today
and tonight. Small craft advisory will be in effect today for most
of the local waters due to seas that could reach as much as 12
feet across the offshore atlantic waters, and ranging between 6|
and 10 feet elsewhere by tonight. There is a high risk of rip
currents for many of the local beaches and a high surf advisory
will go into effect this evening across the northern beaches of
puerto rico, culebra, and saint thomas due to breaking waves of 10
feet or higher. The local winds will be between 15 and 22 knots by
Preliminary point temps pops
Sju 82 73 84 73 70 70 40 40
stt 83 74 83 73 50 40 40 40
Sju watches warnings advisories
Pr... High rip current risk through late Friday night for culebra-
north central-northeast-northwest-san juan and vicinity.
High surf advisory from 6 pm this evening to 6 pm ast Thursday
for culebra-mayaguez and vicinity-north central-northeast-
northwest-san juan and vicinity.
High rip current risk from this evening through Thursday
afternoon for southwest-vieques.
High rip current risk through late Thursday night for mayaguez
Vi... High rip current risk through late Friday night for
st.Thomas... St. John... And adjacent islands.
High surf advisory from 6 pm this evening to 6 pm ast Thursday
for st.Thomas... St. John... And adjacent islands.
Small craft advisory until 8 am ast Saturday for st.Thomas... St.
John... And adjacent islands.
High rip current risk from this evening through late Friday
night for st croix.
Am... High rip current risk from this evening through Thursday
afternoon for coastal waters of southwestern puerto rico
out 10 nm.
Small craft advisory from 2 pm this afternoon to 2 am ast Friday
for coastal waters of southern puerto rico out 10 nm.
Small craft advisory until 8 am ast Saturday for 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
northern puerto rico out 10 nm-coastal waters of northern
usvi and culebra out 10 nm-mona passage southward to 17n.
Small craft advisory from 8 pm this evening to 2 am ast Saturday
for coastal waters of southern usvi vieques and eastern
puerto rico out 10 nm.
Small craft advisory from 2 pm this afternoon to 8 am ast
Saturday for anegada passage southward to 17n.
Small craft advisory from 8 pm this evening to 2 pm ast Thursday
for coastal waters of southwestern puerto rico out 10 nm.
Small craft advisory until 8 am ast Friday for coastal waters of
northwestern puerto rico out 10 nm.
Short term... Icp
long term... .Ja
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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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