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.
Tropical Depression Two has lost its battle to become the next Atlantic tropical storm, but it will still increase shower activity across the Caribbean to end the week.
After temperatures briefly climb to typical midsummer levels, another cooldown will roll into the Midwest and expand to the East for the last part of July.
A potent storm system moving out of the Northwest United States will bring an elevated risk of tornadoes to parts of Alberta and Saskatchewan on Thursday.
Severe thunderstorms that blasted areas of Arkansas with damaging winds and heavy rainfall will continue to race through eastern Texas.
Fresh cooler and less humid air will settle over the Washington, D.C., area for Thursday and Friday.
As California continues to be plagued by intense drought conditions, some surfers are reaping what may be one of very few benefits to such a dry season.
Lawrence, KS (1886)
No rain at all since June 26 of that year.
A hot day throughout the state; Columbus 104 degrees; Augusta - 106 degrees; Louisville - 112 degrees -- record high for state.
Tucson, AZ (1952)
60-mph winds ripped roofs off an apartment complex and an airplane hangar, sweeping dust and sand through the city and leaving 200 persons homeless.