The National Weather Service in the Quad Cities has upgraded the Freeze Watch to a Freeze Warning late Friday night into early Saturday morning in anticipation of temperatures falling into the lower and middle 20's. This cold air will affect the entire Stateline, but not every county is under the warning...yet. Arctic high pressure building into the Midwest is what will allow temperatures to fall off to levels that could potentially damage any new growth of sensitive vegetation. The cold does not stop there, however. Winds will become blustery Friday afternoon and remain that way through Saturday morning. This will create frigid wind chill readings.
In fact, wind chill temperatures will be in the 20's Friday evening and in the teens Friday night and Saturday morning. This will be some of the coldest air we have seen in quite some time. In fact, our average high temperature is 58° currently. With the dip in the jet stream remaining in place for a few more days, we will be nowhere near that number until Sunday when the jet begins to lift north, allowing mild, Pacific air to filter in from the west. This pattern will support milder temperatures to return next week with upper 40's and 50's expect to make a return.