This document discusses using geostationary satellites to predict aviation weather hazards like downbursts and fog. It describes how satellite measurements can be used to calculate indices like the Microburst Wind Potential Index (MWPI) to forecast downburst wind speeds up to 3 hours in advance. Case studies of downbursts in Southern California in 2014 and fog in Salt Lake City in 2015 are presented, showing how satellite data matched observations. The conclusions emphasize that MWPI has conditional skill in forecasting thunderstorm winds and that fog can be detected using infrared channel brightness temperature differences from GOES satellites.