Mauna Kea summit area from the W.M. Keck Observatory webcam at 9 a.m. on January 29, 2013.

By Hawaii 24/7 Staff UPDATED (1/29/2013 at 9:56 PM)

The National Weather Service in Honolulu has extended a winter weather advisory for the summits of Mauna Loa and Mauna Kea above 8,000 feet until 6 a.m. Wednesday (Jan 30).

Mauna Kea rangers report that the road to the summit is closed to the public above the Visitor Information Station due to ice on Mauna Kea Access Road.

About 1/2 inch of snow and light ice has accumulated on the summits above 12,500 feet. Winds are Northwest at five to 10 mph with temperatures about 25 degrees Fahrenheit. Visibility is below 1/2 mile. Driving and hiking in these conditions are hazardous due to snow, freezing rain and slippery roads.

Road conditions can change quickly so check with the road conditions website linked below for updates.

For updated information on summit road conditions visit: http://mkwc.ifa.hawaii.edu/current/road-conditions/