National Weather Service San Juan PR
115 PM AST Fri Feb 17 2017
.SYNOPSIS...An upper level ridge will continue as the main weather
feature across the region local islands for the next several
days. This feature will maintain a generally fair and stable
weather pattern across the local islands during the upcoming
weekend. An upper level trough is expected to amplify over the
region early next week, inducing and increase in cloudiness and
showers across the local islands.
&&
.DISCUSSION...Mostly sunny skies were observed across the local
islands this afternoon. Doppler weather radar detected only few
isolated showers were detected over the coastal waters, but not
significant precipitation was observed over land areas so far this
afternoon. The limited moisture across the region in combination
with daytime heating and local effects is possible to induce some
showers across western and interior sections of Puerto Rico late
this afternoon and this evening. The GFS model guidance suggests
that PWAT values will remain near 1.00 inch during the next few
days. These values do not support the development of any
significant shower activity over the region for the next few days.
A surface high pressure will move over the southwestern Atlantic
tonight and Saturday inducing a northeast low level wind flow
across the northeast Caribbean and pushing a weak frontal
boundary across the local Atlantic coastal waters late in the
weekend and early next week. An upper level trough is also expected
to amplify over the region early next week, inducing and increase
in cloudiness and showers across the local islands. Dry air will
return to the region by midweek.
&&
.AVIATION...Mainly VFR conditions will prevail across all terminals
through the forecast period. Isolated showers still possible late
this afternoon across the interior and western sections of PR.
This could result in VCSH at TJMZ. Low level wind ESE at 10 kts
or less.
&&
.MARINE...Offshore and nearshore buoys indicated seas of 3-4 feet
across the region. Seas will increase to 3-5 feet on Sunday as
another small swell reaches the local Atlantic Waters. No small
craft advisories are anticipated over the next 5 days. Gentle
winds will prevail today, increasing somewhat as shift from the
northeast during the weekend.
&&
.PRELIMINARY POINT TEMPS/POPS...
SJU 73 84 72 85 / 0 0 10 10
STT 71 84 73 83 / 0 10 10 10