A look back over the past week on Hawaii’s tallest summits of Mauna Kea and Mauna Loa with their wintery weather.

A time-lapse movie of the Gemini Observatory December 1-8, 2016 as seen from the Canada-France-Hawaii Telescope. Images courtesy of CFHT

A time-lapse movie from the United Kingdom Infrared Telescope December 1-8, 2016. Images courtesy of University of Arizona/UKIRT

The roadway outside the W.M. Keck Observatory on Mauna Kea in a time-lapse video December 5-8, 2016. Heavy snowfall closed the summit roadway at times. Images courtesy of W.M. Keck Observatory.

Time-lapse multi-image movie of Mokuʻāweoweo Caldera from the Northwest Rim on Mauna Loa. December 1-8, 2016. Images courtesy of USGS/HVO

A time-lapse movie via the Gate Cam camera aimed north towards Mauna Kea at the Mauna Loa Observatory.

A time-lapse movie via a camera aimed north towards Mauna Kea at the Mauna Loa Observatory. December 1-8, 2016. Images via Mauna Loa Observatory.