The Hydro Temporal Variability (HTV) dataset represents a summary of variability in surface water extent during ice-free months (April-October) from 2014-2017 in Alberta. The layer values demonstrate the percent of time a given 10 m pixel was identified as water, and is intended to support monitoring of lake level fluctuations, and identify seasonally flood areas, recurring lakes and permanent lakes in Alberta. This layer is generated using radar satellite imagery, using a workflow developed and implemented in Google Earth Engine (Gorelick et al., 2017). For more detail, please see the available technical documentation. Full details for this dataset can be seen in the publication DeLancey et al. (2018), or by referring to the technical document available for download.