6:45 AM MDT, Thursday, July 19, 2018
A cool high pressure from the north should arrive by Monday, possibly on Sunday, bringing cooler weather and a greater likelihood for clouds and showers. Until then we will be in this hot summer pattern, with today likely to be the hottest day. There is a weak cool front from the east that may make it as far west as the Front Range on Friday. But that is likely to be weak and not really boost the chances for rain. On Saturday there will probably be a little more moisture in the mid levels of the atmosphere leading to some isolated thunderstorms that will cool things off briefly on the local level. But the real change to cooler weather should be Sunday afternoon or Monday.