An upper level low pressure system to the SW of Colorado will be moving eastward today and tonight with a major change in our weather through Thursday. Clouds will be on the increase today over eastern Colorado with thunderstorms developing in the mountains by around noon. The showers and thunderstorms will take later in the day to develop over eastern Colorado focusing on the northern half first. A cold front will also be moving from N to S during the afternoon hours bringing in cooler air overngiht into Wednesday. Thunderstorms this afternoon and evening over the state will turn to general rain showers by midnight which will be fairly consistent at times overnight along the I-25 corridor from Colorado Springs northward to Cheyenne. Plenty of cloud cover on Wednesday with off and on rain showers with perhaps an isolated thunderstorm in the afternoon. High Wednesday will only warm into the 60s most areas of the I-25 corridor. A reinforcing cold front will move through Thursday morning keeping temperatures well below seasonal averages for a change with a chance for rain showers into the latter afternoon hours. The higher elevations of the state above tree line will be receiving some new snowfall from this storm system hinting that fall is just around the corner even though we had one of the warmest if not the warmest summer ever for many locations in the state.