Storm forecast: Parts of the US face their most significant tornado and severe thunderstorm threat in months

Parts of the central US face their most significant thunderstorm threat in months Wednesday as second severe storm season kicks into gear.

A cold front from the West will clash with extreme fall warmth across the central and eastern US and will likely spawn severe thunderstorms and potentially strong tornadoes.

A level 3 of 5 threat for severe thunderstorms has been issued by the Storm Prediction Center as a result. Over 4 million people, including those in Kansas City, and Tulsa, Oklahoma, are in this greatest threat area.

This is the first level 3 or higher threat for Kansas City and other areas in the region since mid-July.

Storms begin by early afternoon Wednesday but become stronger and more widespread through the late afternoon and into the early evening. Potential threats include damaging wind gusts, large hail and a few tornadoes, some of which could be EF2 or stronger.

A less significant, but more widespread level 2 of 5 threat of severe thunderstorms spreads from northern Texas to southern Iowa and includes Dallas and Oklahoma City. The tornado threat is less significant here, but isolated tornadoes could still form and damaging winds and large hail remain serious threats to more than 12 million people.

There's heightened concern over the tornado threat given how prolific a year it has been for twisters in the US. The number of tornadoes reported so far this year is the second-most on record, trailing only 2011's 2,156.

Wednesday's severe setup is typical for fall. Violent thunderstorms are most common in spring and summer, but a second surge of dangerous storms and tornadoes happens during fall and winter as cold air from the north often collides with warmer, moist air streaming out of the Gulf of Mexico.

But the tornado threat so far this fall has been anything but typical. The bulk of tornadoes came from hurricanes Helene and Milton.