321  
FXHW01 KWNH 281231  
PMDHI  
 
HAWAII EXTENDED FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
730 AM EST TUE NOV 28 2017  
 
VALID 00Z WED NOV 29 2017 - 00Z WED DEC 06 2017  
   
..A HEAVY RAIN THREAT CONTINUES
 
 
A SURFACE HIGH TO THE NORTH-NORTHEAST OF THE REGION SHOULD  
MAINTAIN BREEZY/WINDY TRADES FOR THE NEXT FEW DAYS AND SHOULD BE  
REINFORCED LATER IN THE WEEK AS A NEW HIGH SLIDES TO THE NORTH OF  
THE STATE. DEEP MOISTURE FROM THE ITCZ IS MEANWHILE SURGING  
NORTHWARD RESULTING IN THE POTENTIAL FOR HEAVY RAINFALL THROUGH  
MID-WEEK AND FLASH FLOOD WATCHES ARE CURRENTLY IN EFFECT OVER THE  
BIG ISLAND AND MAUI. A WINTER STORM WARNING IS ALSO IN EFFECT FOR  
THE SUMMITS OF MAUNA LOA AND MAUNA KEA WHERE 4-8 INCHES OF SNOW IS  
FORECAST. ANOTHER TROUGH AND POTENTIAL SURFACE LOW WILL SLIDE  
CLOSE TO OR OVER THE WESTERN ISLANDS INTO THE WEEKEND WHICH SHOULD  
SPREAD HIGH PRECIPITATBLE WATER AIR TO FUEL ADDITIONAL HEAVY  
RAINFALL NORTHWESTWARD. GUIDANCE SOLUTIONS ARE BETTER CLUSTERED  
TODAY, BUT STILL OFFER ABOVE NORMAL SPREAD. A MODEL COMPOSITE IS  
PREFERRED.  
 
SCHICHTEL  
 

 
 
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