At least three possible tornadoes are being reported in central Oklahoma hours ahead of what forecasters are cautioning could be a day of "life-threatening" storms.

No injuries were immediately reported after the suspected tornadoes hit early Saturday morning.

Department of Emergency Management official Michelann Ooten says the possible tornadoes were reported west and north of Oklahoma City. One was spotted near Piedmont, a small town where a twister last May killed several people.

The National Weather Service is working to confirm the reports. Weather Service meteorologist Kevin Brown says the storms were fairly weak but still damaged some homes.

The most dangerous weather, however, is expected to develop Saturday afternoon. Officials are warning that a large area spanning from Minnesota to Texas could be at risk.