841  
FXHW01 KWNH 171231  
PMDHI  
 
HAWAII EXTENDED FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
830 AM EDT TUE OCT 17 2017  
 
VALID 00Z WED OCT 18 2017 - 00Z WED OCT 25 2017  
 
...CHANCE OF HEAVY RAINFALL INCREASES BY EARLY TO MIDDLE NEXT  
WEEK...  
 
THE FORECAST PERIOD BEGINS WITH BENIGN WEATHER ACROSS THE HAWAIIAN  
ISLANDS WITH TYPICAL EAST TO NORTHEASTERLY TRADES AS A SUBTROPICAL  
SURFACE HIGH PRESSURE SYSTEM EXTENDS EASTWARD ALONG THE 32-DEGREE  
NORTH LATITUDE THROUGH THE END OF THE WEEK INTO THE WEEKEND. SOME  
ISOLATED SHOWERS CAN BE EXPECTED ESPECIALLY NEAR THE FAVORED  
WINDWARD TERRAIN AREAS. BY EARLY INTO THE MIDDLE OF NEXT WEEK,  
MODELS AND ENSEMBLES ARE INDICATING THE POSSIBILITY OF  
CYCLOGENESIS AS A COLD FRONT APPROACHES FROM THE NORTHWEST. GIVEN  
THE AMPLITUDE OF THE WAVE SHOWN IN THE MODELS THIS FAR OUT INTO  
THE FUTURE, IT APPEARS THAT A CYCLONE IS LIKELY TO FORM EARLY NEXT  
WEEK WITH A COLD FRONT PUSHING ACROSS THE ISLANDS. THE FLOW IS  
EXPECTED TO BECOME MORE SOUTHEAST TO SOUTHERLY BY THEN WITH  
INCREASING MOISTURE CONTENT. THIS WOULD INCREASE THE POSSIBILITY  
OF HEAVY RAIN MOVING ACROSS THE ISLANDS EARLY INTO MIDDLE OF NEXT  
WEEK.  
 
KONG  
 

 
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.

The Nexlab HPC Page Main Text Page