Colorado Issues Excessive Heat Warning for First Time The National Weather Service has issued an Excessive Heat Warning for western Colorado through midnight on Friday, June 18.ย This is the first excessive heat warning issued in Colorado. * WHAT…Dangerously hot conditions with temperatures of 100 to 110 expected. * WHERE…In Utah, Arches/Grand Flat, Canyonlands/Natural Bridges and Eastern Uinta Basin. In Colorado, Grand Valley and Paradox Valley/Lower Dolores River. * […] Weather WeatherBrains | June 15, 2021 0 Comments