Good morning.
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN JUAN PR
607 AM AST THU NOV 1 2012
.SYNOPSIS...INDUCED SURFACE TROUGH SOUTH AND WEST OF THE AREA AND WEAK HIGH
PRESSURE RIDGE JUST NORTH OF THE AREA WILL MAINTAIN A LIGHT EASTERLY
TRADE WIND FLOW ACROSS THE REGION TODAY...THEN BECOMING MORE NORTHEASTERLY
BY THURSDAY AND INTO THE UPCOMING WEEKEND AS THE INDUCED SURFACE TROUGH
WEAKENS.
&&
.DISCUSSION...SCATTERED SHOWERS WERE NOTED OVER THE COASTAL WATERS
OF EASTERN PUERTO RICO AND ACROSS THE U.S. VIRGIN ISLANDS EARLY
THIS MORNING. LATEST SATELITE IMAGES SHOWS A LINE OF MOISTURE
EXTENDING FROM SOUTH TO NORTH EAST OF THE ISLANDS. THIS LINE WILL
MOVE DURING THE MORNING HOURS OVER PUERTO RICO...BRINGING SOME
SHOWERS MAINLY ALONG THE NORTH COAST OF PUERTO RICO. A EAST TO
NORTHEAST WIND FLOW IS DOMINATING THE LOCAL REGION TODAY. THE
COMBINATION OF DAYTIME HEATING...WITH AVAILABLE MOISTURE WILL
RESULT IN THE DEVELOPMENT OF SHOWERS WITH THUNDERSTORMS OVER THE
INTERIOR SECTION OF PUERTO RICO. WITH THE AFOREMENTIONED WIND
FLOW...THE AFTERNOON ACTIVITY WILL AFFECT THE SOUTHWESTERN
SECTIONS OF PUERTO RICO LATE IN THE AFTERNOON.
GENERAL STABLE ATMOSPHERIC CONDITIONS ARE EXPECTED TO PREVAIL OVER
THE REGION NEXT FEW DAYS...AS HIGH PRESSURE RIDGE CONTINUES
DOMINATING THE NORTHEAST CARIBBEAN. PW VALUES WILL REMAIN NEAR 1.5
TO 1.75 INCHES THROUGHOUT THE WEEKEND. NO SIGNIFICANT WEATHER
EVENTS ARE FORECAST TO AFFECT THE LOCAL REGION NEXT FEW DAYS.
&&
.AVIATION...EXPECT PREVAILING VFR CONDITIONS ACROSS ALL TAF SITES
DURING THE OVERNIGHT PERIOD...WITH BRIEF PERIODS OF VCSH ESPECIALLY
AROUND TJSJ. WIND WILL BE LIGHT AND VARIABLE OVERNIGHT...EAST
NORTHEAST WIND FLOW WILL DOMINATE ON THURSDAY.
&&
.MARINE...A NEW GROUP OF NORTHEAST SWELLS GENERATED FROM A DISTANT AREA OF
LOW PRESSURE ACROSS THE NORTHEAST ATLANTIC...WILL START ARRIVING
INTO THE LOCAL ATLANTIC WATERS LATE TONIGHT. REFER TO MARINE
PRODUCTS ISSUED BY THE NATIONAL WEATHER FORECAST OFFICE IN SAN JUAN.
&&
.PRELIMINARY POINT TEMPS/POPS...
SJU 88 78 87 77 / 30 10 10 20
STT 87 77 88 78 / 20 10 10 30
