text: The Storm Prediction Center is part of the National Centers for Environmental Prediction ( NCEP ) , operating under the control of the National Weather Service ( NWS ) , which in turn is part of the National Oceanic and Atmospheric Administration ( NOAA ) of the United States Department of Commerce ( DoC ) .
simplified: The Storm Prediction Center ( SPC ) , located in Norman , Oklahoma , is part of the National Centers for Environmental Prediction .