Freezing rain will develop across northwest Iowa and spread southeastward today and tonight. Around a tenth of an inch of ice accumulation is possible in northern Iowa, with over two tenths of an inch of ice possible in west central Iowa. Freezing rain will transition to snow this afternoon in northern Iowa, with a quick one to two inches of snow possible. Freezing rain advisories, winter storm warnings, and winter weather advisories have been issued because of this freezing rain potential.
A freezing rain advisory will go into effect for portions of southwest Iowa from 6pm this evening to 6am Friday. Freezing rain will begin across northern portions of the area early this evening, spreading southward through the overnight hours. Ice accumulation amounts will range from a few hundredths to one or two tenths of an inch. Untreated surfaces are expected to become icy with travel impacted tonight into Friday morning. Another impact may be from ice accumulating on trees and wires. With winds increasing during the night there will be a possibility of tree damage and isolated power outages.
A winter storm warning for freezing rain, sleet and snow will be in effect from 9am to 9pm Thursday. Rain will change to freezing rain during the morning hours, then mix with sleet and snow by early afternoon before ending as all snow by this evening. All precipitation will end by midnight. Freezing rain may lead to ice accumulations up to 0.25″ by this evening. The combination of significant icing and wind may result in power outages. Dangerous traveling conditions are quite likely to develop during this time. A winter storm warning means significant amounts of snow, sleet and ice are expected or occurring. Strong winds are also possible. This will make travel very hazardous or impossible.
A winter weather advisory is also now in effect through 6am Friday. Freezing rain will develop this morning before changing to light snow early this afternoon. Ice accumulations will vary from a few hundredths to over a tenth of an inch. Snow accumulations will generally be in the one to two inch range. North winds will increase to 15 to 25mph this afternoon and tonight. Untreated surfaces are expected to become icy with travel impacted today and tonight. Another impact may be from ice accumulating on trees and wires. With winds increasing during the day there will be a possibility of tree damage and isolated power outages. Untreated surfaces may remain slick into the morning hours on Friday.
Continue to stay with the Iowa Storm Chasing Network as we will have all the latest travel updates to keep you ahead of the storm.