Area Forecast Discussion
Issued by NWS San Juan, PR

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FXCA62 TJSJ 191704

Area Forecast Discussion
National Weather Service San Juan PR
104 PM AST Sun Feb 19 2017

.SYNOPSIS...A dissipating frontal boundary across the local Atlantic
Waters will continue to induce cloudiness and occasional light to
moderate showers across the local islands through Monday.
An upper level trough over the southwestern Atlantic is expected to
move across the Northeast Caribbean tonight and Monday slightly
increasing the chances of showers across the local area. Drier and
stable air mass is expected to encompass the region again Tuesday
and Wednesday.


.DISCUSSION...Doppler weather radar indicated an area of
cloudiness and showers moving from the Atlantic coastal waters
across the northern and central sections of Puerto Rico this
afternoon. This activity was associated with a dissipating frontal
boundary across the northeast Caribbean. The associated moisture
will continue to move across the northern sections of Puerto Rico as
well as across Vieques, Culebra and the U.S. Virgin Islands tonight
through Monday. However, only light to moderate shower activity is

An upper level trough over the southwestern Atlantic this afternoon
is expected to amplify across the northeast Caribbean tonight and
Monday. This feature in combination with the moisture provided by
the aforementioned frontal boundary will result in an increase in
cloudiness and showers activity tonight through early Monday. A
general dry and stable weather pattern will encompass the region
Late Tuesday and Wednesday.


.AVIATION...Mainly VFR conditions will continue across the local
flying area through much of the forecast period. However, SHRA and
BKN/OVC cigs will affect some of the local terminals as a frontal
boundary dissipates over the region tonight and early Monday. Light
low level winds from the East to ESE will prevail tonight.


.MARINE...A moderate swell will continue to reach the Local
Atlantic waters through late tonight. Seas of 4-6 feet in north
swell have increased the risk of rip current along the north coast
of Puerto Rico. Seas will gradually subside Tuesday and Wednesday.


SJU  73  86  76  82 /  10  30  50  20
STT  74  80  73  80 /  20  20  50  40


PR...High Rip Current Risk through late tonight for North Central-
     Northeast-Northwest-San Juan and Vicinity-Southeast-Western



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