Here are the dates in which these respective radar sites will be offline due to the dual-polarization radar upgrades.
Quad Cities March 19th-April 1st 2012
La Crosse April 16th-April 29th 2012
Sioux Falls August 20th-September 2nd 2012
Des Moines September 17th-September 30th 2012
Omaha March 11th-March 24th 2013
