Area Forecast Discussion
Issued by NWS San Juan, PR

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910
FXCA62 TJSJ 160955
AFDSJU

Area Forecast Discussion
National Weather Service San Juan PR
555 AM AST Mon Jan 16 2017

.SYNOPSIS...High pressure across the western Atlantic will
maintain a fresh northeast wind flow across the local region
through Wednesday. High pressure will weaken at the end of the
week as a deep surface low pressure moves across the western
Atlantic.

&&

.DISCUSSION...Passing showers were observed across the local area
overnight. Most shower activity was observed across the Caribbean
coastal waters. Local area continue to be dominated by a surface
high pressure system which is located across the western Atlantic.
This high pressure system will continue to produce fresh northeast
winds across the local area through at least Wednesday. Therefore,
passing showers will continue to affect the local area from time
to time.

By the later part of the work week, the aformentioned high
pressure system is expected to weaken, which will allow for a
relax in the pressure gradient. As a result, winds will diminish
considerably by Friday. Under a mid to upper level ridge,
relatively fair weather conditions are expected without any
significant weather events affecting the region. Temperatures will
remain very pleasant, with minimum temperatures expected to drop
to the mid to upper 50s by the later part of the work week, as
clear skies are anticipated and winds will be light and variable.

&&

.AVIATION...Mostly VFR conditions expected through the forecast
period. Some passing showers are expected over TIST and TJSJ from
time to time. Low level winds will continue mainly ENE at 10 to 15
kts with higher gusts, mainly in showers.

&&

.MARINE...Latest buoy observations are showing seas between 5 to 7
feet with occasional seas up to 8 feet mainly across the offshore
Atlantic waters. Seas are expected to diminish gradually next few
days. However, marine conditions will continue hazardous through
at least Wednesday. High Surf advisory was cancelled as breaking
waves of 10 feet are no longer expected. Small Craft advisories
will continue in effect through at least Wednesday.


&&

.PRELIMINARY POINT TEMPS/POPS...
SJU  82  74  82  73 /  40  30  30  20
STT  84  72  83  71 /  40  30  30  20

&&

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

     Small Craft Advisory until 6 AM AST Wednesday for Northeast.

VI...High Rip Current Risk through Tuesday afternoon for St Croix-
     St.Thomas...St. John.. and Adjacent Islands.

AM...High Rip Current Risk through Tuesday afternoon for Coastal
     Waters of Northern USVI and Culebra out 10 NM-Coastal
     Waters of Southern USVI Vieques and Eastern Puerto Rico out
     10 NM.

     Small Craft Advisory until 6 AM AST Wednesday 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 Northern Puerto Rico
     out 10 NM-Coastal Waters of Northern USVI and Culebra out
     10 NM-Mona Passage Southward to 17N.

     Small Craft Advisory until 2 AM AST Tuesday for Coastal Waters
     OF Northwestern Puerto Rico out 10 NM-Coastal Waters of
     Southern USVI Vieques and Eastern Puerto Rico out 10 NM.

&&

$$

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