LIHU`E, KAUA`I (Ben Caxton) — High Surf Warnings are once again in effect for the north- and west-facing shores of Kaua`i and Niihau through the end of the weekend. Forecasters with the National Weather Service say a large long-period northwest swell will be building into Saturday along exposed north and west facing shores. Waves will build from 25 to 35 feet on Saturday to as high as 40 to 60 feet on Sunday as a deep low-pressure system developing just north of the state produces giant disorganized waves. The giant waves could cause unprecedented coastal flooding and extreme harbor surges Saturday night through Sunday along north and west facing shores. The County of Kaua`i reminds residents and tourists alike that entering the water in these areas during the High Surf Warning is very hazardous and could cause serious injury or death. Spectators are also advised to use extreme caution, as large breaking waves could make it dangerous for those standing along the shoreline.