OTTUMWA — After a rainy, cool weekend that felt like fall, Ottumwa will be back in summertime temperatures to begin the week.
It was a repeat of the previous weekend in some respects. Of the six-and-a-half inches of rain in September, 5.58 inches have fallen in the past two weekends. Daytime highs struggled to hit 70 degrees.
But, as the saying goes, if you wait five minutes the Iowa weather will change. Monday and Tuesday are forecast to be in the mid-80s. Throw in the humidity from several days’ worth of rain, and the heat index will be in the lower 90s.
That’s not enough to threaten any records, but is more than 10 degrees above normal.
Rain will once again bring an end to the heat, but forecasters are concerned that could mean flash flooding. The ground is soaked. That has put drought concerns on hold, but southeast Iowa now needs time to dry out. The soil cannot hold much more moisture at this time.
The National Weather Service expects that concern to peak in this area on Wednesday, when some areas could see another inch of rain. Heavier rains are expected in northwestern Iowa, which will eventually cause river levels here to rise. The Des Moines River jumped from around 5.5 feet Saturday to a brief peak of 8 feet Sunday. That remains below flood stage.
Chances of rain will linger through Wednesday night. Fall weather will return when the rain ends, with highs in the 60s through next weekend.