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Here's the afternoon forecast from the National Weather Service.

Snow is likely after 4 p.m. Skies will be cloudy and breezy with a high near 31 degrees and east winds gusting as high as 20 mph. The chance of precipitation is 80 percent with total daytime snow accumulation of less than a half inch possible.

Tonight rain and snow, possibly mixed with freezing rain, will become all snow after 4 a.m. with a low around 30 degrees. The chance of precipitation is 100 percent with new ice accumulation of less than a 0.1 of an inch and new snow accumulation of around 4 inches possible.

Tuesday: Snow before 1 p.m. with patchy blowing snow after 1 p.m. The high will be near 32 degrees. Winds could gust as high as 35 mph. The chance of precipitation is 90 percent with new snow accumulation of around an inch possible.

Tuesday night: There's a 40 percent chance of snow before 7 p.m. then patchy blowing snow before 3 a.m. The low will be around 9 degrees with wind chill-values as low as -5 degrees. West winds will gust as high as 35 mph.

And  here is what the weather service is saying in a hazardous weather outlook for the area.

"A winter storm warning is in effect from mid afternoon through Tuesday evening for much of eastern Iowa and northwest Illinois. Snow or mixed precipitation will develop across southeast Iowa, northeast Missouri and western Illinois by noon, spreading northward over the remainder of the area this afternoon. Moderate to heavy snow north, and mixed precipitation will continue tonight.

"Area rivers are experiencing flooding due to recent rain, snowmelt and ice action. Please see the latest Flood Statements and Flood Warnings for details."

Tuesday through Sunday

"A winter storm warning continues through Tuesday evening for much of eastern Iowa and northwest Illinois. Areas of moderate snow Tuesday morning will become light snow during the afternoon. Northwest winds will increase by noon on Tuesday with gusts to around 40 mph during the afternoon into Tuesday night. This will create considerable blowing and drifting snow especially where the heaviest snowfall will occur.

"Total snowfall should range from 5 to 8 inches north of Interstate 80 to 3 to 5 inches along I-80, with lesser amounts to the south. Any ice accumulations in the south should be on the light side.

"A winter storm system may affect the outlook area Thursday and Friday with measurable snow or possibly a wintry mix of precipitation. It is too soon to determine more specific details."

About that winter storm warning in effect from 3 p.m. until 6 p.m., Tuesday:

According to the weather service, "an area of low pressure will strengthen as it tracks from Oklahoma to southeast Lower Michigan bringing widespread snow and mixed precipitation to eastern Iowa and northwest Illinois. The most likely area for a period of sleet and freezing rain is along and south of a Freeport, Ill. to Iowa City line. Moderate, to at times heavy precipitation is expected to develop quickly during the mid to late afternoon today, and continue into tonight. Light to moderate snow will continue on Tuesday. By Tuesday afternoon strong northwest winds will develop with gusts up to 40 mph. This will cause considerable blowing and drifting into Tuesday night, especially where the heavier snow occurs."

A Winter Storm Warning means significant amounts of snow, sleet and ice will make travel very hazardous or impossible.

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