May 31- VIL returns in Grand Rapids, MI indicative of hail
VIL (Vertically Integrated Liquid) values are very high up with the storms occurring in Grand Rapids, Michigan. VIL is a way to determine hail. The higher the VIL value, the more likelihood of hail and larger the hail size.
As we can see, a storm on the Grand Rapids radar is past 65 units. This means that hail is likely occurring in that area.