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 43 44 45 46 47 48 49 50
000
FXCA62 TJSJ 011855
AFDSJU

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN JUAN PR
255 PM AST SUN FEB 1 2015

.SYNOPSIS...SURFACE HIGH PRESSURE WILL BUILD ACROSS THE WESTERN
ATLANTIC...MOVING TO THE EAST AND PASSING TO THE NORTH OF THE
LOCAL AREA EARLY THIS WEEK WHILE A SURFACE LOW MOVES ALONG THE
EAST COAST OF THE US. PRESSURE GRADIENT WILL TIGHTEN LATER TODAY
INTO MONDAY WHILE THE SURFACE HIGH PASSES TO OUR NORTH. UPPER
RIDGE IS DEVELOPING JUST WEST OF THE LOCAL AREA AND WILL MOVE OVER
THE LOCAL AREA EARLY THIS WEEK...REMAINING IN PLACE FOR THE FIRST
HALF OF THE WEEK.

&&

.DISCUSSION...CLOUDINESS WITH FAST MOVING SHOWERS AFFECTED MAINLY
THE NORTHERN HALF OF PUERTO RICO THIS AFTERNOON. A RELATIVELY
DRY AIR MASS WILL CONTINUE TO DOMINATED THE REGION NEXT SEVERAL
DAYS. PATCHES OF LOW LEVEL MOISTURE EMBEDDED IN THE TRADE
WINDS...ARE EXPECTED TO AFFECT THE LOCAL ISLANDS FROM TIME TO
TIME. HOWEVER...NO SIGNIFICANT RAINFALL ACCUMULATION IS EXPECTED.
PRESSURE GRADIENT WILL TIGHTEN LATER TODAY INTO MONDAY WHILE THE
SURFACE HIGH PASSES TO OUR NORTH. UPPER RIDGE IS DEVELOPING JUST
WEST OF THE LOCAL AREA AND WILL MOVE OVER THE LOCAL AREA EARLY
THIS WEEK...REMAINING IN PLACE FOR THE FIRST HALF OF THE WEEK. IN
THE LONG TERM...COMPUTER MODELS SUGGEST A COLD FRONT WILL EXIT THE
EASTERN U.S. MID WEEK AND WILL MOVE SOUTHEAST...APPROACHING THE
LOCAL AREA BY THE WEEKEND. AT THIS TIME..NO ACTIVE WEATHER IS
EXPECTED WITH THIS FEATURE.

&&

.AVIATION...MOSTLY VFR CONDITIONS EXPECTED ACROSS THE LOCAL FLYING
AREA TONIGHT AND THRU 02/17Z...WITH VCSH POSSIBLE IN AND AROUND TIST
AND TISX. AFTER 02/17Z...SHRA DEVELOPMENT EXPECTED ACROSS INTERIOR
AND WESTERN SECTIONS OF PUERTO RICO. THIS MAY CAUSE MVFR CONDITIONS
AT TJMZ AND TJBQ THRU 02/22Z. EAST WINDS OF 10-15 KNOTS ARE EXPECTED
TONIGHT WITH SOME HIGHER GUSTS.

&&

.MARINE...BUOY OBSERVATIONS INDICATED SWELLS OF 10-11 FEET AT 12
SECONDS NEAR 400 MILES NORTHWEST OF THE LOCAL AREA. THESE SWELLS
ARE EXPECTED TO INVADED OUR OFFSHORE WATERS LATE TONIGHT. SEAS UP
TO 8 FEET ARE EXPECTED. SMALL CRAFT ADVISORIES IN EFFECT.


&&

.PRELIMINARY POINT TEMPS/POPS...
SJU  73  85  74  87 /  40  40  20  20
STT  73  83  75  84 /  40  40  20  20

&&

.SJU WATCHES/WARNINGS/ADVISORIES...
PR...
VI...
COASTAL WATERS...SMALL CRAFT ADVISORY FROM MIDNIGHT TONIGHT TO 6 AM AST TUESDAY
     FOR ANEGADA PASSAGE SOUTHWARD TO 17N-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-COASTAL WATERS OF NORTHWESTERN PUERTO
     RICO OUT 10 NM-COASTAL WATERS OF SOUTHERN USVI VIEQUES AND
     EASTERN PUERTO RICO OUT 10 NM.

     SMALL CRAFT ADVISORY FROM 6 PM THIS EVENING TO 6 AM AST TUESDAY
     FOR MONA PASSAGE SOUTHWARD TO 17N.

     SMALL CRAFT ADVISORY UNTIL 6 PM AST TUESDAY FOR ATLC WATERS OF
     PUERTO RICO AND USVI FROM 10NM TO 19.5N.

&&

$$

72/71





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