663  
FXHW01 KWNH 051209  
PMDHI  
 
HAWAII EXTENDED FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
709 AM EST FRI JAN 05 2018  
 
VALID 00Z SAT JAN 06 2018 - 00Z SAT JAN 13 2018  
 
MODELS AND ENSEMBLES AGREE TO MAINTAIN A RELATIVELY QUIET WEATHER  
PATTERN ACROSS HAWAI'I INTO EARLY NEXT WEEK UNDER THE INFLUENCE OF  
A RIDGE OF HIGH PRESSURE. MODERATE MEAN TRADE FLOW OFFERS BELOW  
NORMAL MOISTURE AND LIMITED WINDWARD RAINFALL POTENTIAL. THE BEST  
CHANCE FOR A FEW WINDWARD SHOWERS WILL EXIST THIS WEEKEND FOR THE  
SOUTHERN ISLANDS AS IMPULSE ENERGY DIGS ON THE EASTERN PERIPHERY  
OF THE MID-UPPER LEVEL RIDGE. MODELS SUGGEST THE POTENTIAL FOR A  
FRONTAL BOUNDARY TO APPROACH THE ISLANDS BY WED-THU AS AN  
UPPER-LEVEL SHORTWAVE PASSES NORTH OF THE STATE. THE FRONT SHOULD  
RESULT IN A MODEST INCREASE IN MOISTURE/SHOWER ACTIVITY, WITH THE  
POTENTIAL FOR SOME BRIEF DISRUPTION OF THE TRADES AS WELL. ANY  
DISRUPTION TO THE TRADES APPEARS SHORT-LIVED, HOWEVER, AS THE  
MODELS SHOW SOME CONSENSUS THAT THE FRONT SHOULD WASH OUT QUICKLY  
AFTER REACHING THE ISLANDS. IN THE WAKE OF THE FRONT, MODELS SHOW  
HIGH PRESSURE AND DRY AIR ONCE AGAIN RETURNING TO HAWAI'I.  
 
RYAN  
 

 
 
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