Today is typically the busiest travel day of the year. Fortunately, there won't be any widespread bad weather across much of the nation, however there will be a few active spots....
As you can see on the above forecast map for today (from the HPC), severe thunderstorms are possible across portions of Oklahoma, Arkansas and Missouri. This will include a risk of tornadoes late this afternoon and evening.
Rain and thunderstorm activity across portions of the mid-Mississippi River Valley and Midwest could pose a flash flooding threat from southeast Missouri into southwest Ohio.
Heavy snows are possible across portions of North Dakota and the central Rockies. Ice and snow mixed are possible from portions of Iowa, eastward into central & northern portions of Illinois and Indiana.
A strong cold front will continue progressing Southward through the central & northern Plains today, bringing much colder and windy conditions in its wake.