A stormy weather pattern midweek will help spawn powerful thunderstorms across parts of the Midwest and Ohio Valley.
The combination of warm and humid air fueled thunderstorms Tuesday along the I-80 corridor from central Iowa to northern Illinois. Late Tuesday evening, storms moved into Chicago bringing high winds up to 60 mph and golf ball sized hail.
Large hail was reported throughout the eastern suburbs of Denver, Colorado, as well as across Illinois, Iowa and Nebraska throughout Tuesday evening.
The risk of locally severe storms will push to the southeast over portions of Indiana and Ohio into Wednesday.
On Wednesday, conditions will come together to support strong-to-severe thunderstorms from the middle part of the Mississippi Valley through the Ohio Valley.
Storms on Wednesday into Wednesday night can contain damaging winds, large hail and flooding downpours.
St. Louis, Missouri, Indianapolis, Indiana, Louisville, Kentucky, Cincinnati, Ohio and Pittsburgh, Pennsylvania, could be directly affected by these intense thunderstorms.
Impacts could include slow travel and a higher risk of accidents on Interstates 70, 65, 57, 64, 74 and 71, along with flight delays at the major airports.
Power outages are also a threat due to lightning strikes and high winds pushing tree limbs onto power lines.
A drier and cooler pattern will set up during the latter portion of the week across the Midwest.
Cold air and flurries are in store for the New Hampshire primary on Tuesday but should not significantly impact voter turnout.
Snow and slippery travel will arrive in the mid-Atlantic states prior to the middle of the week.
Waves of arctic air invading the eastern half of the United States this week will culminate with the coldest weather of the season so far for some areas by the Valentine's Day weekend.
Chilly air will visit New Orleans this year for the annual Mardi Gras celebrations and linger over the city until later in the week.
Warmer air will build from California to Washington into Tuesday raising temperatures to near-record levels and increasing the risk of wildfires in some areas.
Denver Broncos fans celebrating the Super Bowl win will see ideal conditions for Tuesday's parade and pep rally.