Hopefully the SPC upgrades portions of SD/MN/NE/IA to a moderate risk. Looks like a textbook long-track MCS/derecho setup.
An MCS currently in SD, which originated in far W MT yesterday evening, has matured and is tied to a nice wave topping the ridge over the Central US. Should see that complex ride the instability gradient ESE through the afternoon/evening, acorss portions of SD/NE/MN/IA. How far east it makes it will be dependent on other developing convection through the day ahead of it, near a frontal boundary in place.