950  
FNCA72 TJSJ 081856  
FWSSJU  
 
SPOT FORECAST FOR 191 S RIO SABANA...USFS  
NATIONAL WEATHER SERVICE SAN JUAN PR  
256 PM AST TUE SEP 8 2026  
 
FORECAST IS BASED ON FORECAST START TIME OF 1500 AST ON SEPTEMBER 08.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
 
PLEASE CONTACT OUR OFFICE IF YOU HAVE QUESTIONS OR CONCERNS  
WITH THIS FORECAST AT  
PHONE: 787-253-4586.  
   
..HEAT ADVISORY IN EFFECT UNTIL 5 PM GMT THIS AFTERNOON  
 
   
DISCUSSION  
 
A TROPICAL WAVE WILL BEGIN TO APPROACH THE AREA TONIGHT INTO  
WEDNESDAY, INCREASING MOISTURE AND THE FREQUENCY OF PASSING SHOWERS  
WITH BRIEF PERIODS OF MODERATE TO LOCALLY HEAVY DOWNPOURS DURING THE  
OVERNIGHT HOURS ACROSS EASTERN PUERTO RICO. WINDS SHOULD PREVAIL  
FROM THE EAST AT 10 MPH OR LESS, WITH STRONGER GUSTS NEAR SHOWERS.  
AS THE WAVE CONTINUES TO MOVE WESTWARDS, SHOWERS WILL INCREASE IN  
COVERAGE BY THE MORNING HOURS AND CONTINUING THROUGH THE EARLY  
AFTERNOON HOURS. A SECOND TROPICAL WAVE WILL APPROACH THE REGION BY  
THURSDAY, PROMOTING A SIMILAR WEATHER PATTERN ACROSS THE AREA.  
   
REST OF TODAY  
 
SKY/WEATHER.........PARTLY SUNNY (55-65 PERCENT). SCATTERED  
SHOWERS.  
CHANCE OF PCPN......40 PERCENT.  
MAX TEMPERATURE.....AROUND 81.  
MIN HUMIDITY........77 PERCENT.  
MAX APPARENT TEMP...85.  
SURFACE WINDS (MPH).EAST WINDS 10 TO 13 MPH.  
SMOKE DISPERSAL.....GOOD (39300 KNOT-FT).  
DISPERSION..........6.  
 
TIME (AST) 11A 12P 1PM  
SKY (%).........60 60 60  
WEATHER COV.....SCT SCT SCT  
WEATHER TYPE....RW RW RW  
TSTM COV........  
CHC OF PCPN (%).40 40 40  
TEMP............80 79 77  
RH..............78 81 87  
APARNT TMP (F)..85 83 77  
SURFACE WND DIR.E E E  
SURFACE WND SPD.13 12 10  
SURFACE WND GST.16 13 12  
DISPERSION......6 6 6  
VRATE KT-FT/1K..39 39 39  
VENTRATE CAT....PR PR PR  
 
 
FORECASTER...G. RIVERA  
REQUESTED BY...GABRIEL GUTIERREZ  
TYPE OF REQUEST...OTHER  
.TAG 2621436.0/SJU  
.DELDT 09/08/26  
.FORMATTERVERSION 2.0.0  
.EMAIL GABRIEL.GUTIERREZVILLANUEVA@USDA.GOV  
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