Description: From McGimsey and others (2005): "The AAWU [Alaska Aviation Weather Unit] called AVO on January 31, 2003 to relay an 11:00 AST (2000 UTC) PIREP from the Cold Bay Flight Service Station of a steam plume from Shishaldin with tops to 16,000 ft (4,875 m) ASL and moving to the north. The pilot reported no sulfur smell. AVO staff checked the seismic data for Shishaldin and found no change at the time of the PIREP. Another PIREP was reported to AVO on the morning of September 12, 2003 concerning a steam plume observed rising 500 ft (~150 m) above the top of Shishaldin. The time of the report was 11:07 ADT (19:07 UTC) and neither satellite nor seismic data indicated anything unusual. This information was subsequently reported back to AAWU."