Simplify the following text for a Grade 13 native English-speaking person.
Original: The National Weather Service ( NWS ) , once known as the Weather Bureau , is one of the six scientific agencies that make up the National Oceanic and Atmospheric Administration ( NOAA ) of the United States government .
Simplified: The National Weather Service ( also known as NWS ) is one of the six scientific agencies that make up the National Oceanic and Atmospheric Administration ( NOAA ) of the United States government .