A flash flood warning for Kauai expired at 12:45 p.m. today, but the Hawaiian Islands remain under a flash flood watch through 6 p.m. Monday.

Kauai Emergency Management reported Kuhio Highway was closed today due to impassable conditions at the Hanalei River Bridge and near Powerhouse Road in Wainiha. Flash flooding was a threat for several hours as water from earlier rainfall moved downstream toward the coast. One lane of the highway is now open for alternating traffic through the area.

Forecasters say a trough of low pressure will remain in place across the island chain through Monday while an upper level low moves overhead, which will likely produce unstable conditions statewide along with the potential for flash flooding.

A high surf advisory remains in effect until 6 a.m. Monday for all north- and west-facing shores of Kauai, along with the north- and west-facing shores of Niihau, Oahu and Molokai, north-facing shores of Maui and west-facing shores of Hawaii island.

A flood advisory for Oahu expired this evening. Radar indicated heavy rain near Kualoa Ranch with rain falling at a rate of 1 to 2 inches per hour earlier this afternoon.