Much of Oklahoma is at high risk for tornadoes on Monday, but forecasters warned the region could see additional hazards including very large hail, severe winds and flash flooding.

A "very active and complex mid-May weather pattern" is settling over states from the central United States through the Mid-Atlantic.

Severe storms are anticipated in the central US, following deadly tornadoes in Kentucky. The National Weather Service warns of diverse weather hazards, including thunderstorms, large hail, and intense heat.

A series of severe thunderstorms packing high winds, hail and tornadoes will progress from the Great Lakes to the Ohio and Tennessee valleys through the end of the week, AccuWeather meteorologists warn.

A busy stretch of severe thunderstorms is underway due to record heat and now the threats are ramping up, putting major metro areas from Chicago to Nashville under threat as the country hits the peak of tornado season.

Tuesday afternoon and evening brings a risk for severe storms as a cold front approaches Alabama from the north. An enhanced risk (level 3/5) for severe weather stretches across northwest Alabama. A slight risk (level 2/5) stretches across the I-20/59 corridor, followed by a marginal risk (level 1/5) across south Alabama.