532  
FXHW01 KWNH 171411  
PMDHI  
 
HAWAII EXTENDED FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
910 AM EST FRI NOV 17 2017  
 
VALID 00Z SAT NOV 18 2017 - 00Z SAT NOV 25 2017  
 
THE MAIN SYNOPTIC-SCALE SYSTEM IMPACTING THE WEATHER ACROSS HAWAII  
DURING THE FORECAST PERIOD WILL BE A CUT-OFF/CLOSED LOW WHICH HAS  
CONTINUED TO DROP SOUTHWARD FROM THE HIGHER LATITUDES TOWARD  
HAWAII. MODEL GUIDANCE AGREES THAT A COLD FRONT ASSOCIATED WITH  
THIS SYSTEM WILL PASS THROUGH THE HAWAIIAN ISLAND CHAIN ON  
SATURDAY WITH A BRIEF PERIOD OF ENHANCED SHOWERS POSSIBLE,  
FOLLOWED BY WINDS SHIFTING TO MORE WEST TO NORTHWESTERLY  
DIRECTIONS. SOME POST-FRONTAL SHOWERS CAN BE EXPECTED AT TIMES ON  
SUNDAY AS THE MARINE LAYER ON THE BACK SIDE OF THE VORTEX WILL  
APPEAR TO MOVE INTO THE AREA. THE CYCLONE SHOULD BEGIN TO PULL  
OUT ON MONDAY AS IT GRADUALLY OPENS UP AS A POSITIVELY TILTED  
TROUGH FURTHER TO THE NORTHEAST. THEREAFTER, MODELS AGREE THAT A  
SUBTROPICAL HIGH WILL SLOWLY BUILD SOUTHEASTWARD INTO THE REGION  
WITH A GRADUAL RESUMPTION OF THE TRADE WINDS TOWARD THE MIDDLE OF  
NEXT WEEK. MODELS NO LONGER INDICATE THE POSSIBILITY OF TROPICAL  
MOISTURE APPROACHING FROM THE SOUTH LATER NEXT WEEK. HOWEVER,  
THEY BEGIN TO INDICATE THE POSSIBILITY OF ANOTHER CUT-OFF LOW  
FORMING ABOUT A FEW HUNDRED MILES NORTHEAST OF HAWAII TOWARD NEXT  
WEEKEND.  
 
KONG  
 

 
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.

The Nexlab HPC Page Main Text Page