AccuWeather.com

By Heather Buchman, Meteorologist

Mar 20, 2010; 1:37 PM ET

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The storm that dumped over half a foot of snow and caused numerous vehicle accidents in Denver and Boulder, Colo. Friday will continue spreading snow through areas from Oklahoma to Michigan into tonight. Road conditions will continue deteriorating, while airport delays remain a problem for other travelers.

The heaviest snow through tonight will target Oklahoma, southeastern Kansas, northwestern Arkansas and western Missouri. A widespread 3 to 6 inches is expected across this region with some areas picking up closer to a foot.

Expected snowfall totals Saturday night into Sunday

Oklahoma Gov. Brad Henry declared a State of Emergency Friday in anticipation of the snowstorm.

With roads becoming snow covered and slippery, travel will remain dangerous through Sunday. Strong northwesterly winds gusting up to 40 mph are adding to the travel hazards by blowing the snow around and bringing visibility down to a quarter of a mile in some places.

Heavy snow will continue on the back side of the storm Saturday night, while locally heavy rain and strong thunderstorms spread farther to the south and east.

People who must travel, even along major interstates such as I-35, I-40, I-44 and I-70, should use caution and allow plenty of extra time to reach their destinations.

While snow that continues falling across areas farther northeast into northern Illinois and Michigan through tonight will not be as heavy, it will still be problematic. Snow and gusty winds in Chicago were causing arriving flights to be delayed nearly two hours on average at O'Hare this morning.

Northern Texas is another area where there can be problems, as snow totals are expected to reach 1 to 3 inches through Sunday. Even people around the Dallas-Fort Worth Metroplex could see a coating to an inch of snow accumulate on non-paved surfaces tonight into Sunday.