697  
FXHW01 KWNH 231226  
PMDHI  
 
HAWAII EXTENDED FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
826 AM EDT MON OCT 23 2017  
 
VALID 00Z TUE OCT 24 2017 - 00Z TUE OCT 31 2017  
 
...STRONG COLD FRONT WITH LOCALLY VERY HEAVY RAIN LATE TONIGHT  
INTO TUESDAY...  
 
THE WELL-ADVERTISED STRONG COLD FRONT WILL MOVE THROUGH THE  
HAWAI'IAN ISLANDS LATER TODAY THROUGH TUESDAY, BRINGING LOCALLY  
HEAVY RAIN AND GUSTY WINDS TO THE REGION. PRECIPITABLE WATER  
VALUES WILL CONTINUE TO RISE TO OVER 2 INCHES (+2 TO +5 STANDARD  
DEVIATIONS) AHEAD OF THE FRONT WITH A DEEP TROPICAL CONNECTION TO  
THE ITCZ. HI-RES MODELS INDICATE WIDESPREAD 2-4" OF RAIN CENTERED  
OVER MOLOKAI/MAUI/LANAI'I WITH LOCAL MAXIMA OF 6-10" WITH A  
SECONDARY MAXIMUM OVER THE SOUTHERN SIDE OF THE BIG ISLAND. FLASH  
FLOODING IS POSSIBLE.  
 
ONCE THE FRONT PASSES BY TO THE EAST, COOLER AND MUCH DRIER AIR ON  
BREEZY NW TO N FLOW WILL INFILTRATE THE STATE. WINDS WILL CONTINUE  
TO VEER TO THE NE AND EVENTUALLY ENE BY THE END OF THE WEEKEND  
WITH UPPER RIDGING JUST TO THE WEST OF THE AREA. BY SUN/MON,  
ANOTHER FRONT (MUCH WEAKER) WILL APPROACH THE REGION FROM THE NW.  
 
FRACASSO  
 

 
 
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