The National Weather Service has issued a winter weather advisory and warns of ice and up to 2 inches of snow on Hawaii island summits, in effect until 6 p.m. today.

The winter weather advisory means periods of snow, sleet or freezing rain will cause slippery roads and limited visibility.

A high surf advisory for the east shores of most isles, and for the north and west shores of Niihau, Kauai, Oahu and Molokai, and north-facing shores of Maui, remains in effect until 6 p.m. Tuesday.

Forecasters expect surf to build to 12 to 16 feet today along north and west shores of the smaller isles, then peak tonight before trending down midweek. Strengthening trades combined with an easterly swell will continue to generate advisory-level surf through Tuesday for the east shores of all islands.

Expect strong, breaking waves, shore break and longshore and rip currents, making swimming difficult and dangerous. Heed advice given by Ocean Safety officials and know your limits.