Here are the record highs (tied or broken) so far for today.
76° at Des Moines (tied)
77° at Atlantic (broken)
73° at Dubuque (tied)
79° at Omaha NE (broken)
75° at Mason City (broken)
As more reports come in this post will be updated.
Also note Des Moines also broke the Highest Minimum temp for the date with a low of 56°