Two storm systems this week will send temperatures below freezing.
Highs will be near 70 Monday.
But temperatures will plunge as much as 30 degrees between Monday and Tuesday afternoon.
Severe thunderstorms and flooding are possible tonight.
A second wave of winter weather is expected Wednesday and Thursday.
Areas north of I-44 will see more snow.
Areas along and south of I-44 will see a mix of snow, sleet and freezing rain.
Travel could be a mess Wednesday night thru Thursday morning.
