Scientific Forecaster Discussion
Area forecast discussion
National Weather Service San Juan PR
255 PM AST Friday Mar 27 2015
Synopsis...upper level ridge will hold through Sat then weaken
somewhat next week as broad trough becomes dominant weather feature
across the Atlantic. Ridge will then weaken more rapidly next weekend.
Discussion...dry weather will prevail through the weekend beneath
strong upper level ridge. Ridge and associated subsidence
inversion begin to weaken early-middle next week promoting moisture
transport and enhancing middle-level instability mainly Tuesday and Wednesday
with T-storms possible. Some drying expected Wednesday night into Thursday.
A sharp trough will move across the area next weekend.
Aviation...VFR conds expected at all taf sites through the forecast
period. Brief MVFR conds will remain possible through 27/22z in
and around jbq/jmz. Southeast winds 15 to 20 knots through 27/22z becoming
light and variable overnight.
Marine...winds and seas will subside tonight into Monday. Winds
and seas build again next week.
Preliminary point temps/pops...
sju 76 89 75 88 / 0 0 10 10
stt 76 86 75 85 / 0 0 10 10