Thunderstorms are moving Eastward toward western Missouri and western Arkansas. Despite the time of day, widespread moisture and instability ahead of the activity, as well as a strong upper level storm system moving across the region from the West will maintain the threat of severe weather, including tornadoes, into the overnight hours.
Tornado Watches have recently been issued ahead of this activity over Missouri and Arkansas, as shown by the image below:
Tornadoes are particularly dangerous at night. If you live in this region, be sure that you have a way to receive warnings during the night. A NOAA Weather Radio is an excellent tool. If you don't have one of those available, check to see if a local media or online weather outlet has a text alert service.
In addition to a threat of tornadoes, very large hail & damaging winds can also be expected in these areas overnight.