This dataset includes raw point cloud data from repeat terrestrial laser scans (TLS) for measuring early-stage protodunes developing, migrating and eroding on a moist surface in the Medano Creek Area, Great Sand Dunes National Park and Preserve, Colorado, USA. As well as the TLS data, additional measurements include wind speed with a CSAT 3D sonic anemometer and sediment transport using a Sensit and Wenglor fork sensors.