High humidity builds Monday afternoon

 A Heat Advisory remains in place until 8pm Monday for Winnebago, Boone, Ogle, Lee, DeKalb, and McHenry counties, while an Excessive Heat Warning remains in place for Stephenson, Jo Daviess, Carroll, Whiteside, Green, Rock, and Walworth counties. These alerts are in place as heat index values approach 110-115 degrees!

Little relief is expected Monday night with overnight lows only expected to fall into the mid-70s, jump starting the climb in temperatures Tuesday afternoon.

A strong ridge of high pressure centered over the Midwest Monday has kept skies cloud free, allowing temperatures to soar Monday afternoon. This ridge will hold strong through Tuesday, although storms developing to the north Monday evening may allow for an outflow boundary to sink south of the state line Tuesday morning which *could* bring afternoon high temperatures down just a bit.

However, the expectation is for the boundary to have little impact, with temperatures warming back into the mid-90s and heat index values reaching 110-115 degrees Tuesday afternoon. As a result, an Excessive Heat Warning will be in place for the entire viewing area through Tuesday evening.