A late September hot spell has set itself in place over Colorado, thanks to a strong and relatively stationary upper-level ridge. The ridge's orientation today is ideal for heat transfer into Colorado, and 90°F is likely for much of the District's lower elevations today. Some high-level clouds will filter through this afternoon, but that will be the most interesting weather today outside of the heat. Skies will stay clear overnight as temperatures drop back into the mid 50s.

STORM RAINFALL POTENTIAL AND DURATION: No rainfall is expected within the District today.

A LOOK AHEAD: The ridge's heat will be disrupted Friday/Saturday by a weak cold front tonight, with afternoon highs being low/mid 80s until Sunday. Sunday will again threaten to hit 90°, then a cold front sometime in the afternoon Monday will drop temperatures to more fall-like conditions for next week. No rainfall is expected for an extended period in and around the District.