The National Weather Service has updated its winter storm warning for the Perry area in effect from 3 p.m. Monday to 6 p.m. Tuesday. Snow accumulations of 4 to 7 inches or more are now forecast.
Mixed precipitation Monday afternoon will give way to heavy snow Monday night, the NWS said. Significant amounts of snow, sleet and ice, with winds gusting as high as 35 mph by Tuesday, will make travel very hazardous or impossible.
The storm system is expected to enter the state Monday, with a widespread wintry mix changing to all snow by Monday night and ending by Tuesday morning.
Strong winds on the backside of the storm front will likely produce blowing and drifting snow into Tuesday, the NWS said.
Along with Dallas County, the Iowa counties under the winter storm watch include Sac, Calhoun, Crawford, Carroll, Greene, Boone, Story, Marshall, Tama, Audubon, Guthrie, Polk, Jasper, Poweshiek, Cass, Adair, Madison, Warren, Marion, Mahaska, Adams, Union, Clarke, Lucas, Monroe and Wapello.
Along with Perry, cities under the winter storm watch include Sac City, Lake View, Odebolt, Wall Lake, Schaller, Early, Rockwell City, Manson, Lake City, Pomeroy, Denison, Carroll, Jefferson, Boone, Ames, Marshalltown, Tama, Toledo, Traer, Dysart, Gladbrook, Audubon, Exira, Guthrie Center, Panora, Bayard, Casey, Waukee, Adel, Des Moines, Newton, Grinnell, Atlantic, Greenfield, Stuart, Adair, Fontanelle, Winterset, Earlham, Indianola, Norwalk, Carlisle, Pella, Knoxville, Oskaloosa, Corning, Creston, Osceola, Chariton, Albia and Ottumwa.
Travelers should plan on slippery and poor road conditions. Visibility will be reduced to below one-half mile at times from falling and blowing snow. Drifting and increasing winds might pose problems for travelers by Wednesday. The Monday evening and Tuesday morning commutes will likely be difficult or impossible.
The latest road conditions can be obtained by calling 5 1 1.
ThePerryNews.com will update this weather story as forecasts evolve.