Area Forecast Discussion
Issued by NWS San Juan, PR

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42
000
FXCA62 TJSJ 202232 AAA
AFDSJU

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE SAN JUAN PR
632 PM AST THU NOV 20 2014

.SYNOPSIS...UPPER LEVEL LOW OVER THE LEEWARDS WILL GRADUALLY FILL
AS IT MOVES INTO THE ERN CARIBBEAN. UPPER LEVEL RIDGE THEN
GRADUALLY BUILDS THROUGH MON AS CNTRL ATLC UPPER LOW RETROGRESSES.

&&

.DISCUSSION...SATELLITE IMAGERY...BLENDED TPW AND LATEST MODEL
GUIDANCE ALL SHOW SHARP DRYING AT LEAST THROUGH 06Z TONIGHT. SO
UPDATED FCST TO REMOVE POPS FOR THIS EVENING AND IMPROVE SKY CVR
GRIDS. MOISTURE WILL SLOWLY BEGIN TO INCREASE OVERNIGHT AND
ESPECIALLY FRI THROUGH SAT WITH SHOWERS BECOMING LIKELY FRI NIGHT
AND SAT MAINLY OVR THE ERN HALF OF PR FROM AREAS FROM ABOUT
ARECIBO EAST TO FAJARDO AND USVI. SOME FLOODING IS POSSIBLE OVR
THE ERN THIRD OF PR AND NORTHEAST PR WHERE STRENGTHENING TRADE
WINDS WILL RESULT IN OROGRAPHIC ENHANCEMENT. THINGS BEGIN TO DRY
OUT RAPIDLY LATE SAT THROUGH SUN NIGHT. SFC WINDS WILL BE
STRENGTHENING FURTHER SUN AND MON WITH VERY ROUGH SEAS AND ROUGH
SURF CONDITIONS. THERE WILL BE SOME MOISTURE RECOVERY ON MON BUT
OVERALL FAIR WX CONDITIONS WILL PREVAIL MUCH OF NEXT WEEK UNDER
STRONG UPPER LEVEL RIDGE BUT EVEN AS RIDGE WEAKENS MID TO LATE
WEEK AS UPPER LOW GETS CLOSER TO THE AREA...AREA WILL REMAIN UNDER
STRONG UPPER LEVEL CONVERGENT PATTERN.

&&

.AVIATION...VFR CONDITIONS TONIGHT. P6SM SKC.


&&

.MARINE...SEAS REMAIN 5-7 FT AND WINDS 15-20 KT. WINDS STRENGTHEN
SAT THROUGH MON 20-25 KT AND SEAS BUILD 6-8 FT. SMALL CRAFT
ADVISORIES WILL MORE THAN LIKELY REMAIN IN EFFECT THROUGH TUE.


&&

.PRELIMINARY POINT TEMPS/POPS...
SJU  76  86  75  86 /  20  90  90  90
STT  79  81  77  87 /  20  70  70  70

&&

.SJU WATCHES/WARNINGS/ADVISORIES...
PR...NONE.
VI...NONE.
COASTAL WATERS...SMALL CRAFT ADVISORY UNTIL 6 PM AST SUNDAY FOR ANEGADA PASSAGE
     SOUTHWARD TO 17N-ATLC WATERS OF PUERTO RICO AND USVI FROM
     10NM TO 19.5N-CARIBBEAN WATERS OF PUERTO RICO FROM 10 NM TO
     17N-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 FROM NOON FRIDAY TO 6 PM AST SUNDAY FOR
     MONA PASSAGE SOUTHWARD TO 17N.

&&

$$

64/64





USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.