The National Weather Service has issued a Winter Weather Advisory from noon tomorrow (Jan. 18) through 6 a.m. Saturday, Jan. 19, for southeastern Nebraska and southwestern Iowa, including Otoe and Fremont counties.   * WHAT...Snow expected. Total snow accumulations of 2 to 5 inches expected. Locally higher amounts possible. Gusts of 20 to 30 mph will lead to blowing snow and reduced visibility.   * WHERE...Portions of east central and southeast Nebraska and southwest Iowa.   * WHEN...From noon Friday to 6 AM CST Saturday.   * ADDITIONAL DETAILS...Plan on slippery road conditions. The hazardous conditions could impact the evening commute.   PRECAUTIONARY/PREPAREDNESS ACTIONS...   A Winter Weather Advisory for snow means periods of snow will cause primarily travel difficulties. Expect snow covered roads and limited visibilities, and use caution while driving.   The latest road conditions for the state you are calling from can be obtained by calling 5 1 1.