Using weather data from both satellite and ground-based observations, this lesson challenges students to select a site location for a hypothetical mountain retreat. Students must determine and then justify a building site after gathering, graphing... (View More) and analyzing two sources of data on altitude, atmospheric pressure, temperature and relative humidity. To conclude the lesson, students defend their choice in a formal site recommendation letter to the "retreat developers." This lesson uses student- and citizen science-friendly microsets of authentic NASA Earth system science data from the MY NASA DATA project. It also includes related links, extensions, an online glossary, and data analysis tools. (View Less)