Lava just poured out layer upon layer for millions of years. With sensitivities on these telescrope set in microns, there will be plenty of warning when Mauna Kea starts rumbling again. Mauna Kea has an incredibly unique weather pattern. But as the Island cools at night, the clouds clear. Mauna Kea's snow is all the more dramatic as it contrasts the Big Island's basic stone color of black lava.
Postcards show snowmen and pineapples on the summit.
All art shops have paintings of a snow covered mountain. There can even be skiing and snowboarding exhibitions. However once the storm passes the summit road is quicky re-opened. You need to call ahead to check conditions. There are many tales of week-long storms and instances where the summit could be accessed with a Snow Cat.