Here is the latest position of the jet stream over the US for today.........No surprise that things will go boom when this combined with the frontal passage begins moving into the mid-west tomorrow into the warm air flowing up from the Gulf......Sort of a "mini" taste of what may come down the road when we get to our normal Spring severe weather and tornado outbreaks. Not the type of set-up that we usually see in late January (with temps this warm flowing out of the Gulf). [link to squall.sfsu.edu]