Below Average Temp Trend

Much cooler conditions on the back end of the cold front that passed late Monday night.  High pressure advances down from Canada ushering in cooler temps.  By sunrise, high pressure is directly over the Stateline.

 

This allows for "radiational cooling" to occur.  This happens when high pressure is overhead getting rid of all cloud cover.  At night, clouds act like a blanket that keep in the heat,  but when skies are clear (like tonight), all the heat we got during the day escapes into the atmosphere and in its place is cool air.

Radiational Cooling Effect

Morning lows will be in the low 50s around the Stateline.  It'll be the coolest temperature reading we've seen in over a month!- MT