By Harry Hillaker, State Climatologist, Iowa Department of Agriculture & Land Stewardship
The past reporting week began with above normal temperatures and widespread rainfall Sunday (19th) afternoon into Sunday night. Very heavy rain fell over much of Mitchell County with a 5.10 inch daily total at Saint Ansgar. Warm weather continued into Monday (20th) with scattered thunderstorms over the northeast two-thirds of the state during the evening hours. A transition to cooler weather began on Tuesday (21st) with light rain spreading into northwest Iowa. Cloudy and damp weather was the rule for much of the period from Wednesday through the weekend. Light to moderate rain fell statewide on Wednesday and lingered into Thursday morning over the far east. Thunderstorms brought rain statewide from late Friday through Saturday (25th) morning. Another heavier round of storms passed through Iowa from late Saturday through Sunday (26th) morning. Torrential rain fell over northwest Iowa early Sunday morning from Lyon County southeast to Cherokee County and also over central Iowa from the Marshall County southeast to Keokuk County. Still more heavy rain fell later Sunday into Monday in much the same areas but this next event will be included in next week’s summary. Weekly rain totals varied from 0.54 inches at Beaconsfield in Ringgold County to 9.06 inches at Grinnell. The statewide average precipitation was 2.34 inches or more than double the weekly normal of 1.05 inches. Temperature extremes varied from Monday (20th) afternoon highs of 82 degrees at Dubuque Lock & Dam and Iowa City to Friday morning lows of 35 degrees at Elkader and Cresco. Temperatures for the week as a whole varied from one degree below normal in the southwest to five degrees below normal in the northwest with a statewide average of 3.5 degrees below normal.