948 FXCA62 TJSJ 151740 AFDSJU Area Forecast Discussion National Weather Service San Juan PR 140 PM AST Sun Jan 15 2017 .SYNOPSIS... Broad mid to upper level trough will continue north of the region through Monday. This trough is to then become amplified across the northern leewards and the eastern Caribbean by Tuesday. It is forecast to linger through the end of the upcoming week, as high pressure will build across the western Caribbean and eastern sea board of the United States. Surface high pressure ridge extending across the northeast Caribbean from the north central Atlantic along with and an area of low pressure across the northeastern Atlantic will maintain a dominant northeast wind flow across the region today. Winds are however to become more easterly during the upcoming week as surface high pressure will build and spread across the west and central Atlantic. The local pressure gradient is also expected to loosen resulting in a diminishing of the east to northeast trades. && .DISCUSSION...Moderate northeasterly winds prevailed today across the region with occasional gusty winds and occasional passing showers . Some showers continued to move southwest across the local waters and reach the inland portions of the islands from time to time. Periods of moderate to locally heavy downpours were observed and reported across portions of the interior and west sections of Puerto Rico. The shower activity however was of short duration with no significant rainfall accumulation or flood problems noted today. For the rest of the evening and overnight hours expect the northeast winds to to persist but are to become more more easterly as the high shifts farther east across the Atlantic, and the area of low pressure lift farther north. In the meantime patches of shallow low level wind moisture and passing showers will still be possible during the overnight and early morning hours. On Monday, skies will become mostly sunny with moderate easterly prevailing trade winds. Early and late morning showers will be focused across parts of northern PR followed by lesser showers during the afternoon. The afternoon activity should be focused mainly over parts of the interior and south west sections of PR. Mostly fair skies and a stable weather pattern is so far forecast for the latter part of next week, as high pressure and a drier air mass will prevail across the region. && .AVIATION...VFR conds expected through the period. Winds from the east to ENE expected to persist at 10-20KT and gusty through 16/00Z. Sct SHRA will cause at least VCSH with some SHRA briefly affecting the terminals. The overall pattern is expected to continue through tonight but the winds are expected to diminish some after 16/00Z and increase once again after 16/13Z. && .MARINE...Local buoys continued to indicate that the seas are gradually diminishing but still remain choppy and hazardous. Small Craft advisories remain in effect for most of the coastal waters due to a slowly fading northerly swell and the moderate to locally fresh northeasterly trade winds. High surf advisory, and a high risk of rip currents also remain in effect for mainly the north facing beaches of most of the islands. Please refer to the latest Coastal Waters Forecast, Marine Weather Message and Surf Zone Forecast issued by the National Weather Service WFO San Juan PR for additional information. && .PRELIMINARY POINT TEMPS/POPS... SJU 75 84 75 83 / 30 40 40 40 STT 75 83 75 84 / 40 40 30 30 && .SJU WATCHES/WARNINGS/ADVISORIES... PR...High Rip Current Risk through Monday evening for Culebra- Mayaguez and Vicinity-North Central-Northeast-Northwest-San Juan and Vicinity-Southeast-Vieques-Western Interior. Small Craft Advisory until 2 AM AST Wednesday for Northeast. High Surf Advisory until 8 PM AST this evening for Culebra-North Central-Northeast-Northwest-San Juan and Vicinity-Southeast- Western Interior. VI...High Rip Current Risk through Monday evening for St Croix- St.Thomas...St. John.. and Adjacent Islands. High Surf Advisory until 8 PM AST this evening for St Croix. AM...High Rip Current Risk through Monday evening 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 2 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. && $$ 25/09