Mild temperatures were prevalent in the weeks prior to this year\u27s survey; however, temperatures cold enough to form a thin layer of ice on some reservoirs and lakes occurred between aerial surveys. Three of the aerial surveys were conducted on the 6th and 7th of January and one was conducted on the 13th. The survey route that includes the Platte River from Kearney to Plattsmouth and the Loup River was not surveyed this year because of persistent foggy conditions. Temperatures recorded during the 1998 survey were variable, ranging from 5 to 40 degrees F. The Niobrara River was 50 to 99% ice-covered from the Newport bridge and downstream. Above the Newport bridge, ice coverage ranged from 0 to 40%. The unchanneled portion of the Missouri ...