Across the Upper Midwest:
Hazardous conditions are expected as a mid/upper-level trough, featuring a negatively tilted axis, is anticipated to cause additional problems across the upper Midwest for the starting work week. This system, merging with existing conditions, is likely to lead to a treacherous situation marked by ice formation, resulting in icy roads and hazardous conditions. This development is anticipated from midnight tonight through Tuesday morning with the bulk of it being Monday night. Further information and regional specifics of the forecast can be found below.
Overall Forecast:
In the mid to upper levels of the atmosphere, an eastward-moving, negatively tilted trough is anticipated to cross the south-central U.S. slowly moving up with advection ahead of it, drawing in substantial Gulf moisture into the Midwest United States. This influx of moisture, combined with atmospheric impulses/shortwaves, will enable the formation of precipitation across the region. However, atmospheric temperature variations, notably a considerable warm-up at approximately 850mb, are expected to melt any frozen precipitation aloft. This will result in it falling as rain and subsequently re-freezing upon reaching the ground, leading to ideal conditions for ice formation.