Area Forecast Discussion
Issued by NWS San Juan, PR

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FXCA62 TJSJ 200920
AFDSJU

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN JUAN PR
520 AM AST SAT DEC 20 2014

.SYNOPSIS...MID TO UPPER LEVEL RIDGE WILL CONTINUE TO BUILD OVER
THE REGION THROUGH THE NEXT SEVERAL DAYS SUSTAINING A TRADE WIND
CAP. AT THE SURFACE...WEAK SURFACE HIGH PRESSURE NORTH OF THE
ISLANDS WILL MAINTAIN A EAST-NORTHEAST LOW LEVEL WIND FLOW OVER
THE REGION.

&&

.DISCUSSION...MOSTLY CLEAR SKIES WERE OBSERVED ACROSS ALL LOCAL
ISLANDS TONIGHT WITH ISOLATED PASSING SHOWERS ACROSS THE
SURROUNDING WATERS. FAIR WEATHER CONDITIONS ARE FORECAST TO
CONTINUE ACROSS THE ISLANDS MOST OF THE WEEKEND. HOWEVER...A BAND
OF LOW LEVEL MOISTURE WILL REACH THE USVI AND EASTERN PR LATE
SUNDAY...ALLOWING ISOLATED TO LOCALLY SCATTERED SHOWERS TO FORM
NEAR OR OVER THE U.S. VIRGIN ISLANDS ON SUNDAY AFTERNOON. DRIER
AIR BEGINS TO FILTER IN AGAIN MON THROUGH THE END OF NEXT WEEK AS
UPPER LEVEL RIDGE AND ASSOCIATED SUBSIDENCE INVERSION STRENGTHENS
FURTHER.

&&

AVIATION...SHALLOW/ISOLD SHRA BUT WL NOT LWR COND BLW VFR SAT-SUN.
WIND ENE 8-18 KT SFC-FL200 THRU SUN.

&&

.MARINE...LOCAL BUOYS ARE INDICATING SEAS 3-4 FT NORTH OF THE
ISLANDS AND BELOW 3 FT SOUTH OF THE ISLANDS. FOR
TODAY...NEARSHORE WINDS 10-20 KT MAINLY FROM THE EAST-NORTHEAST
AND SEAS UP TO 5 FT.

&&

.PRELIMINARY POINT TEMPS/POPS...
SJU  84  71  83  72 /  20  20  20  20
STT  86  74  86  75 /  20  20  20  20

&&

.SJU WATCHES/WARNINGS/ADVISORIES...
PR...NONE.
VI...NONE.
COASTAL WATERS...NONE.
&&

$$

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