Here are some of the lows that occurred earlier this morning

-21° at Clarion
-18° at Sioux City
-17° at LeMars, Estherville, Webster City
-16° at Sheldon and Spencer
-15° at Fort Dodge, Mason City, Atlantic and Marshalltown
-14° at Harlan
-13° at Charles City, Waterloo, Oelwein and Dubuque
-12° at Denison, Carroll, Audubon, Ames, Orange City and Decorah
-11° at Red Oak
-10° at Shenandoah, Cedar Rapids, Creston, Monticello, Boone and Storm Lake
-8° at Davenport
-6° at Ottumwa and Des Moines
-1° at Burlington (The warmest reading in the state)