The probability of significant hail, thunderstorm-generated winds, and tornadoes — given that a thunderstorm develops — is already high in the Central U.S.
Thunderstorms are now starting to develop in far northwest Nebraska (arrows). They will begin moving southeast.
In Kansas, there are two boundaries between rain-cooled air and the hot air to the south. This time of year, violent thunderstorms generally form along or to the north or east of boundaries such as these. Please pay attention to the weather in these areas as the day progresses.