842  
ABPZ20 KNHC 231140  
TWOEP  
 
TROPICAL WEATHER OUTLOOK  
NWS NATIONAL HURRICANE CENTER MIAMI FL  
500 AM PDT SAT SEP 23 2017  
 
FOR THE EASTERN NORTH PACIFIC...EAST OF 140 DEGREES WEST LONGITUDE:  
 
A LOW PRESSURE SYSTEM LOCATED ABOUT 100 MILES SOUTHWEST OF  
MANZANILLO, MEXICO, HAS BECOME BETTER DEFINED OVERNIGHT. ALTHOUGH  
ASSOCIATED SHOWER AND THUNDERSTORM ACTIVITY HAS CHANGED LITTLE,  
ENVIRONMENTAL CONDITIONS ARE EXPECTED TO REMAIN FAVORABLE FOR  
A TROPICAL DEPRESSION TO FORM LATER TODAY OR ON SUNDAY. INTERESTS  
IN COLIMA AND JALISCO SHOULD MONITOR THE PROGRESS OF THIS SYSTEM FOR  
ANY POTENTIAL WATCHES OR WARNINGS ISSUED THIS WEEKEND. REGARDLESS  
OF DEVELOPMENT, VERY HEAVY RAINS ARE EXPECTED OVER PORTIONS OF  
SOUTHWESTERN MEXICO DURING THE NEXT SEVERAL DAYS.  
* FORMATION CHANCE THROUGH 48 HOURS...HIGH...90 PERCENT.  
* FORMATION CHANCE THROUGH 5 DAYS...HIGH...90 PERCENT.  
 
A LARGE AREA OF DISORGANIZED SHOWERS AND THUNDERSTORMS IS  
ASSOCIATED WITH A BROAD AREA OF LOW PRESSURE LOCATED SOUTH OF  
GUATEMALA OVER THE FAR EASTERN PACIFIC. SOME GRADUAL DEVELOPMENT OF  
THIS SYSTEM IS POSSIBLE OVER THE NEXT FEW DAYS BEFORE THE SYSTEM  
MOVES OVER CENTRAL AMERICA EARLY NEXT WEEK.  
* FORMATION CHANCE THROUGH 48 HOURS...LOW...10 PERCENT.  
* FORMATION CHANCE THROUGH 5 DAYS...LOW...30 PERCENT.  
 

 
FORECASTER STEWART  
 
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