National Weather Service United States Department of Commerce

High temperatures on Tuesday will be more reminiscent of early June than late April. Highs will push into the 80s across the plains, with 70s in the foothills, and 60s to lower 70s in mountain valleys.
Critical fire weather conditions can be expected across the Front Range Foothills, South Park, I-25 Urban Corridor, and most of the eastern plains of Colorado Wednesday. The worst conditions can be expected from mid-late afternoon through the evening as southwest winds increase with gusts around 45 mph. That will combine with relative humidity values in the single digits to create conditions favorable for rapid wildfire spread. Avoid any activity that may produce a spark, and be ready to take swift action should a wildfire start closeby. Always follow instructions from local officials.
A very warm and dry airmass will hold through the middle of the week. Wednesday will likely feature critical fire weather conditions over the plains, foothills, and some high mountain valleys as southwest winds increase and become gusty in most areas by late in the day. Thursday will be cooler, but elevated to critical conditions will still be possible due to gusty northwest winds.