Possible gas plume on Mount Michael

LANDSAT 8 satellite imagery from 6th December 2014 shows what appears to be a gas or water vapour plume originating from the summit area of Mount Michael on Saunders Island. Because the west flank is covered in mist it is not easy to tell for sure whether it really is an emission or if it is just a wind current. Thermal imagery could not pick up any thermal anomalies from the same area so I am under the opinion that it is either water vapour related, or that it could be weather related.

Water vapour? wind current? SOURCE: Landsat 8/USGS/NASA.