National Weather Service San Juan PR
154 PM AST SAT OCT 8 2016
.SYNOPSIS...Tropical wave over the Caribbean Waters south of Puerto
Rico will continue to move westward and away from the local islands
tonight. Weak upper level low will retrogress over the region on
Monday...enhancing the convective instability across the islands.
Tropical Storm Nicole will remain near stationary north of the
local area through early next week before move to the north-
northeast over the Central North Atlantic after Tuesday.
&&
.DISCUSSION...Tropical wave is moving south of Puerto Rico this
afternoon. Low level winds have shifted from the southeast after
the passage of the wave axis...favoring moisture advection across
the local islands. This result in scattered showers across the
local waters and portions of the interior and northern half of
Puerto Rico this afternoon. Additional showers and thunderstorms
will develop across these areas through sunset as moisture and
convective instability remains fairly high.
Although the tropical wave moves away from the region tonight...
moisture will remain above normal through at least midweek.
Persistent south-southeast flow due to the proximity of Tropical
Storm Nicole will favor the moisture advection and hot temperatures
across the islands over the next several days. With an upper
level trough/TUTT moving over the Northeast Caribbean region
early next week...shower development is likely across the forecast
area. Heavy rainfall is possible each day especially over portions
of the interior and north Puerto Rico. The forecast for the second
part of next week is still uncertain...mainly because models
disagree on the track of Tropical Storm Nicole. The track of
Nicole will affect the low level flow...hence the rain and
temperature forecast is still uncertain at this time.
&&
.AVIATION...SHRA/TSRA, mountain obsc and SCT-BKN ceiling at
FL025-FL050 expected across the half section of PR/Northern USVI
thru 22z. This will result in brief MVFR or even IFR conds at
TJBQ/TJMZ and possibly TJSJ/TIST. This activity is expected to
diminish around sunset, leaving just a few passing -SHRA across
TIST/TJPS/TISX/TNCM/TKPK. SFC wnd from the S to ESE at 10-15 knots
and gusty near SHRA/TSRA, becoming calm to light and variable aft
08/23z.
&&
.MARINE...TS Nicole will continue to send moderate swells across
the local Atlantic waters during the next few days. A bigger swell
is forecast by the NOAA Wave Watch 3 for early next week. This
will likely result of seas building to 5-7 feet across the local
Atlantic waters between Tuesday and Wednesday. Elsewhere...seas of
3-5 feet expected through the forecast period.
&&
.PRELIMINARY POINT TEMPS/POPS...
SJU 78 90 77 92 / 30 40 10 40
STT 80 87 82 87 / 40 40 30 30