Here's a short article, Keeping Safe From Ice, published on the National Center for Atmospheric Research (NCAR) website that chronicles the development of the CIP/FIP icing diagnostic tools that are available in the EZWxBrief progressive web app. Shown below is the Severity forecast available within the EZRoute Profile view depicting the risk of heavy ice in the dark blue color.
Most pilots are weatherwise, but some are otherwise™
Dr. Scott Dennstaedt
Weather Systems Engineer
CFI & former NWS meteorologist