Models were picking up on the precip lull earlier today. Watch a regional radar and you will see that things are starting to fill in.
From MKX:
As precip continues to shift east, attention will turn westward
toward the precip responsible for phase three of the event. Due
to a lack of deeper lift & some lingering dry air aloft, a
precip lull continues in locations west of a Monroe-Madison-Fond
du Lac line. Anticipate that this lull will continue through
mid-evening (~8 PM), prior to filling in as an upper wave &
affiliated deformation zone move in during the mid-evening
hours. Still anticipate the development of moderate to heavy
snow along the deformation band, with enhanced rates continuing
into the early morning hours Monday. Will continue to monitor
observational & model trends through mid-evening and provide
additional updates as necessary.