The National Weather Service in Honolulu has canceled the Winter Storm Warning that had been posted for the upper slopes and summit areas of Mauna Loa and Mauna Kea on the Big Island.
The warning was issued Friday for areas above the 12,000-foot elevation as temperatures fell to the mid and upper 20s overnight.
There wasn't much snow, but forecasters said black ice formed on roadways, making driving dangerous. Temperatures rose above freezing, into the upper 30s, by Saturday morning, melting the ice.
The Mauna Kea Weather Center closed the road to the summit of Mauna Kea late Friday, but reopened the road Saturday. However, only four-wheel-drive vehicles are being allowed after the end of the paved road at Hale Pohaku.