(Des Moines) The Winter Storm Watch that was in effect for southwest and western Iowa has been upgraded to a Winter Storm Warning. The timing of the storm has changed too.
According to the National Weather Service in Des Moines, a winter storm warning for heavy and blowing snow has been issued for Audubon, Cass, Adair, Adams, Union and Taylor counties in southwest Iowa from 11:00 a.m. Thursday to noon on Friday.
Forecasters say snow will develop by mid to late morning Thursday over southwest Iowa and spread northeast through the day. The highest snowfall rates will occur from late morning through mid afternoon. Light snow will continue the remainder of the night and travel by Thursday afternoon and especially the evening commute will likely be quite hazardous and difficult.
Snow accumulations will range from 6-10 inches with local higher amounts possible. The heaviest snowfall will likely occur over the far southwest. Easterly winds will increase to 15-25-miles per hour during the period of strongest winds reducing visibility to ¼ of a mile or less for a period of several hours.
Meteorologists say conditions will deteriorate rapidly as the snow moves in Thursday afternoon. At the onset, visibility of less than one half mile at times can be expected. Travel will become hazardous due to poor visibility and the roads rapidly become icy and snow packed.
February 20, 2013