There is the risk of strong to locally severe thunderstorms for a time Wednesday night from northern Louisiana to southern Illinois.
The greatest risks from the storms will be strong wind gusts and hail, as well as flash and urban flooding.
Cities that could be hit by the strong storms and their gusty winds and blinding downpours include Little Rock, Ark.; Memphis, Tenn.; Tupelo, Miss.; Monroe, La., Cape Girardeau, Mo.; Louisville, Ky.; and Evansville, Ind.
Even as the potential for severe thunderstorms decreases after midnight, showers and locally heavy, gusty thunderstorms will continue along an advancing front as it pushes to the east through Thursday.
There is a slight chance of a couple of the strongest storms producing a tornado.
A strong flow of air behind the front can bring damaging wind gusts even without thunderstorms.
There is the potential for nearly hurricane-force wind gusts in the clear air spanning thousands of square miles expanding from the northern Rockies to the northern and central Plains during the middle of the week.
Very blustery conditions are likely to sweep into the middle Mississippi and Ohio valleys Wednesday night and Thursday in the wake of the front.
The coldest air of the winter is gripping much of the eastern United States and will feature single-digit and sub-zero temperatures in the Northeast through the Valentine's Day weekend.
The dangerous cold gripping the eastern United States will set the stage for a significant snow and ice storm to unfold from Tennessee and Georgia to Maine Presidents Day into Tuesday.
A storm will track across portions of the midwestern United States into Sunday night bringing a batch of snow and ice.
A multi-vehicle accident involving more than 50 vehicles occurred amid snow showers and brutal cold and led to the shutdown of Interstate 78 in Lebanon County, Pennsylvania, Saturday morning.
Voters heading out to the polls on Saturday, Feb. 20, can expect mild weather and dry conditions for the next step in the 2016 Presidential Election.
Heavy rain will raise the risk of flooding across more than a dozen states from the Southeast on Presidents Day to the East Coast on Tuesday.
New England (1940)
Valentine Day blizzard southern New England: 10-18 in. of snow along with gale winds.
Roofs collapse: Since noon, Feb. 13th, roofs collapsed at Police Building in Sparta, a tennis court northwest of Grand Rapids, and a bowling alley in Grand Haven due to weight of snow. In western Michigan this is one of the heaviest snow packs in the past 3 decades. Also in the Alpena area, a roof at the Air National Guard Base at Phelps Collins Airport collapsed.
Minneapolis, MN (1993)
Temperature 11.5 degrees above normal so far in February.