169  
FXHW01 KWNH 211209  
PMDHI  
 
HAWAII EXTENDED FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
708 AM EST WED FEB 21 2018  
 
VALID 00Z THU FEB 22 2018 - 00Z THU MAR 01 2018  
 
AN UPPER LOW IS FORECAST TO FORM LATER TODAY TO THE NORTHWEST OF  
THE AREA WITH A DOWNSTREAM NARROW RIDGE ALONG 150W. THIS WILL  
ALLOW DEEP TROPICAL MOISTURE TO SURGE NORTHWARD ACROSS THE STATE  
WITH LOCALLY MODERATE TO HEAVY RAIN AND EMBEDDED THUNDERSTORMS.  
PRECIPITABLE WATER VALUES ARE FORECAST TO RISE TO BETWEEN ABOUT 1  
1/3 TO 1 3/4 INCHES THROUGH THE PERIOD WHICH IS WELL ABOVE AVERAGE  
FOR LATE FEBRUARY. ANOTHER UPPER LOW MAY FORM NEXT WEEK JUST WEST  
OF 170W WHICH MAY PULL THE PRECIPITABLE WATER AXIS WESTWARD NEXT  
WEEK, PERHAPS WEST OF KAUAI/NI'IHAU.  
 
FRACASSO  
 

 
 
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