The National Weather Service in Honolulu has issued a high wind warning and a winter weather advisory for the summits of Mauna Kea and Mauna Loa until 6 a.m. Thursday.
Forecasters said layered moisture moving over the Big Island from the southeast will combine with an upper-level trough to produce heavy snow showers and strong winds over the summits.
South-southwest winds of 40 to 65 mph, with localized gusts of more than 75 mph are expected. The strongest winds will occur over the ridges and exposed structures at the highest elevations.
Snow accumulations of one-to-four inches are expected. Road closures are possible due to dangerous driving conditions.
A high wind warning means that sustained winds at the summits are expected to be at least 55 mph, with gusts more than 65 mph. Take necessary precautions to protect property. Delay or avoid travel to the summit until after the winds subside.
A winter weather advisory means that periods of snow, sleet or freezing rain will cause travel difficulties. Be prepared for slippery roads and limited visibilities and use caution while driving.