Nebraska, Iowa Officials Wary of River Ice

SIOUX CITY, Iowa (AP) - Iowa and Nebraska officials have been keeping wary watch on an ice-covered portion of the Missouri River for any flood threat it could pose.  Woodbury County emergency services chief Gary Brown says the ice situation near Ponca is "something we're monitoring. It's nothing we're alarmed with at this point."  That could change with higher temperatures expected this weekend. If the ice breaks up and chunks float downstream, that could snag on something and jam the river channel. That could cause water to back up and flood the banks or raise tributary stream levels.  Emergency services director Shea Scollard in Dixon County says he hasn't gotten any calls yet from worried residents along the river.