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 310818
AFDSJU

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN JUAN PR
418 AM AST SUN AUG 31 2014

.SYNOPSIS...UPPER LEVEL RIDGE WILL CONTINUE TO BUILD OVER THE LOCAL
REGION AND REMAINS AS THE MAIN WEATHER FEATURE ACROSS THE LOCAL
ISLANDS FOR THE NEXT FEW DAYS AS TUTT LOW...NORTH OF HISPANIOLA...
MOVES WESTWARD. A WEAK TROPICAL ALONG 60 WEST THIS MORNING...IS
EXPECTED TO REACH THE REGION BY TUESDAY.

&&

.DISCUSSION...DOPPLER WEATHER RADAR DETECTED ISOLATED TO SCATTERED
SHOWERS ACROSS THE REGION OVERNIGHT AND EARLY THIS MORNING. SOME OF
THESE SHOWERS AFFECTED THE EASTERN SECTIONS OF PUERTO RICO FROM TIME
TO TIME. THIS ACTIVITY WAS ASSOCIATED WITH A MOIST WIND FLOW OVER
THE REGION...ENHANCED BY AN UPPER LOW JUST TO THE NORTH OF
HISPANIOLA. FOR THIS AFTERNOON...THE AVAILABLE MOISTURE ACROSS THE
REGION WILL COMBINE WITH DIURNAL HEATING AND LOCAL OROGRAPHIC
EFFECTS TO INDUCE THE DEVELOPMENT OF SHOWERS AND THUNDERSTORMS.
UNDER THE PREVAILING EASTERLY WIND FLOW...MOST AFTERNOON ACTIVITY
WILL BE FOCUSED ACROSS THE CORDILLERA AND WEST PUERTO RICO.

RIDGE ALOFT WILL CONTINUE TO BUILD OVER THE LOCAL ISLANDS FOR THE
FEW DAYS...AS THE UPPER LOW JUST NORTH OF HISPANIOLA...MOVES FURTHER
WEST AND AWAY FROM THE FORECAST AREA. AS THE UPPER RIDGE BUILDS OVER
THE REGION...PWAT VALUES ARE EXPECTED TO DECREASE FOR THE NEXT
SEVERAL DAYS. HOWEVER...SHOWERS AND A FEW THUNDERSTORMS WILL DEVELOP
EACH DAY OVER WESTERN AND INTERIOR SECTIONS OF PUERTO RICO. A WEAK
TROPICAL WAVE...ALONG 60 WEST THIS MORNING WILL CONTINUE TO MOVE
WESTWARD APPROACHING THE LOCAL ISLANDS ON TUESDAY...INDUCING A
MODEST INCREASE IN CLOUDINESS...SHOWERS AND THUNDERSTORMS OVER THE
LOCAL ISLANDS.

&&

.AVIATION...VFR AT LCL TAF SITES...MOSTLY PASSING -SHRA/SHRA OVR
COASTAL WATERS BTW PR AND NRN LEEWARDS. SCT-BKN LOW CLDS BTW
FL020-FL100...SCT-BKN HI CLDS FL200 MAINLY W-NW OF PR. L/LVL WNDS
MAINLY FM E-NE 5-15 KTS UP FL100...BCMG S-SW 10-20 KTS UP TO FL350.
AFT 31/17Z TYPICAL SCT SHRA/ISOLD TSRA FCST ACROSS CTRL AND W PR NR
TJMZ AND TJBQ...FEW -SHRA/SHRA VCTY REST OF TAF SITES TIL 31/22Z. NO
OTHER SIG OPERATIONAL WX IMPACTS ATTM.

&&

.MARINE...SEAS WILL REMAINS UP TO 5 FEET AND WINDS UP TO 18 KNOTS
ACROSS THE REGIONAL WATERS TODAY. SMALL CRAFT ARE URGED TO
EXERCISE CAUTION ACROSS THE ATLANTIC WATERS.


&&

.PRELIMINARY POINT TEMPS/POPS...
SJU  87  78  89  79 /  30  30  30  30
STT  88  78  90  80 /  30  40  40  30

&&

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

$$

09/72




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