Past IEM Features tagged: fall09
View larger image
click image for better view
The featured map displays the percentile values for fall minimum temperature this year compared with all other years for a period up until 24 November. Des Moines has only seen a minimum low of 30 degrees so far this fall, which is easily the warmest minimum for the site. Rewording, every year prior to this one, Des Moines had seen a temperature below 30 during the fall before 24 November. Cold air will arrive in time for Thanksgiving, but lows will only be in the 20s.