The des moines area had heavy rain and lightning sunday night with wind gusts of mph. Powerful storms packing large hail heavy rain and tornadoes made for a deadly memorial day weekend across the nations midsection killing at least seven people in iowa and a year old child in minnesota. S. Tim halback of the national weather service in romeoville ill. Dalessio in chicago and dinesh ramde in milwaukee contributed to this report. Tornado season typically peaks in the spring and early summer then again in the late fall.