Small Craft Advisory 12, NWS JSJ

Area Forecast Discussion
National Weather Service San Juan PR
504 PM AST Fri Feb 2 2018

.SYNOPSIS...A mid to upper level ridge will continue to dominate
the local region through the weekend. At the surface, high
pressure system will continue to promote a moderate to fresh trade
wind flow across the region. These winds will continue to
transport patches of low level moisture across the islands from
time to time.

&&

.SHORT TERM...Tonight through Sunday...
A surface high pressure across the Atlantic waters will continue
to promote an east to east northeast wind flow across the region
for the next couple of days. Patches of low to mid level clouds
embedded in the trades are expected to move across the region from
time to time, producing variable cloudy skies and passing showers
across the local islands and surrounding waters tonight and
Saturday morning. Some shower activity is also expected to
develop across western and interior sections of Puerto Rico
Saturday afternoon. Late Saturday and Sunday, a patch of dry air
will move across the region limiting the shower activity across
the local islands. No significant changes are expected in the
present weather pattern for the next several days.

.LONG TERM...Monday through Saturday...From previous discussion...
Seasonal weather pattern will prevail across the region as upper
level ridge maintains control of the weather. Trade wind showers
will affect the local islands from time to time, but overall dry
weather conditions are expected. No significant weather events are
forecast to affect the region throughout the forecast period.

&&

.AVIATION...Satellite imagery depicted patches of clouds en route to
the islands, which will produce brief periods of BKN-OVC ceilings
across the region. Some -SHRA/SHRA are expected mainly across
the U.S. Virgin Islands terminals as well as across TJSJ until at
least 03/00Z. Latest TJSJ sounding indicate and east to east wind
flow from the surface to around 13k feet, becoming light and
variable between 13-24k feet and then westerly and stronger aloft

&&

.MARINE...Local buoy are showing seas between 6 to 7 feet as a
north swell affects the local waters. As a result, small craft
remain in effect across most of the local waters. Hazardous
marine conditions are expected to continue through the weekend.
Refer to latest coastal hazard message product (CFWSJU) for more
information.

&&

.PRELIMINARY POINT TEMPS/POPS...
SJU  74  82  73  83 /  50  50  10  30
STT  73  84  73  84 /  50  50  10  10

&&

.SJU WATCHES/WARNINGS/ADVISORIES...
PR...High Rip Current Risk through Sunday afternoon for North Central-
     Northeast-Northwest-San Juan and Vicinity-Western Interior.

     High Rip Current Risk until 2 AM AST Saturday for Vieques.

     High Rip Current Risk through late tonight for Mayaguez and
     Vicinity.

     High Rip Current Risk through late Saturday night for Culebra.

VI...High Rip Current Risk through Sunday afternoon for St Croix.

     High Rip Current Risk through late tonight for St.Thomas...St.
     John...and Adjacent Islands.

AM...Small Craft Advisory until 2 AM AST Saturday for Caribbean
     Waters of Puerto Rico from 10 NM to 17N-Coastal Waters of
     Southern USVI Vieques and Eastern Puerto Rico out 10 NM.

     Small Craft Advisory until 8 PM AST Sunday for Anegada Passage
     Southward to 17N-Atlantic Waters of Puerto Rico and USVI
     from 10 NM to 19.5N-Coastal Waters OF Northwestern Puerto
     Rico out 10 NM-Coastal Waters of Northern Puerto Rico out
     10 NM-Mona Passage Southward to 17N.

     Small Craft Advisory until 2 PM AST Saturday for Coastal Waters
     of Northern USVI and Culebra out 10 NM.

&&

SHORT TERM...WS
LONG TERM....JF