South Dakota, Nebraska and Kansas are between North Dakota and Oklahoma.
The direction to take to go from North Dakota to Oklahoma would be south.
South Dakota is further north than Florida, North Carolina and Oklahoma.
The state of North Dakota is north (or above) the state of South Dakota.
You pass through North Dakota, South Dakota, Nebraska, Kansas, and Oklahoma. If you want to travel by Interstate, you would pass through North Dakota, South Dakota, Iowa, Missouri, Kansas, and Oklahoma.
The only states just north of Oklahoma are Colorado and Kansas. Kansas is East of Colorado, so that doesn't really fit the requirement. However, if you remove the "just" from your requirement, then north of both Oklahoma and Colorado are Nebraska, North Dakota, and South Dakota.
North Dakota is north of South Dakota.
Oklahoma, Kansas, Nebraska, South Dakota and North Dakota
Oklahoma would be the one most likely to have a tornado. However, all of these states have had tornadoes, and North Dakota is fairly tornado prone.
North Dakota is the US state north of South Dakota.
The state of South Dakota is south of the state of North Dakota.
Montana, North Dakota, South Dakota, Wyoming, Nebraska, Kansas, Colorado, New Mexico, Oklahoma, and Texas.