Within each alpha21_yyyymmdd_hhmmss.nc file is the HIWC potential (HIWC_INT_F), computed using fuzzy logic blending techniques on a combination of satellite, numerical weather prediction, and ground based radar data. The field is uncalibrated but roughly corresponds to a likelihood of HIWC conditions, ranging from zero (very unlikely HIWC) to 1 (very likely HIWC). ALPHA (Algorithm for prediction of HIWC areas) was developed by the HIWC team at the National Center for Atmospheric Research (NCAR). The algorithm was trained using in situ ice water content measurements from field campaigns in Darwin Australia (2014), Cayenne French Guiana (2015) and Florida (2015). For more information can be found in: Rugg, Allyson, Julie Haggerty, George McCabe, Cathy Kessinger, Walter Strapp, and J Delanoe. "Evaluations of the Algorithm for Prediction of High Ice Water Content Areas (ALPHA): Methods and Results." American Meteorological Society Annual Meeting, 18th Conference on Aviation, Range, and Aerospace Meteorology, 24 January 2017, Washington State Convenction Center, 705 Pike St,m Seattle WA. Conference Presentation. Contact Information: Julie Haggerty: haggerty@ucar.edu Allyson Rugg: arugg@ucar.edu