Just read this from UNL Crop Watch.

http://cropwatch.unl.edu:80/archive/-/asset_publisher/VHeSpfv0Agju/content/northern-plains-likely-to-see-below-normal-temps-this-spring?redirect=http%3A%2F%2Fcropwatch.unl.edu%2Farchive%3Fp_p_id%3D101_INSTANCE_VHeSpfv0Agju%26p_p_lifecycle%3D0%26p_p_state%3Dnormal%26p_p_mode%3Dview%26p_p_col_id%3Dcolumn-2%26p_p_col_count%3D1