what is the time zone in oklahoma city?
Central Time Zone
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 Oklahoma is connected to the nation 's rail network via Amtrak 's Heartland Flyer , its only regional passenger rail line . It currently stretches from Oklahoma City to Fort Worth , Texas , though lawmakers began seeking funding in early 2007 to connect the Heartland Flyer to Tulsa . 

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 The United States Census Bureau estimates that the population of Oklahoma was 3 @,@ 911 @,@ 338 on July 1 , 2015 , a 4 @.@ 26 % increase since the 2010 United States Census . 

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 The National Weather Center , located in Norman , houses a unique collection of university , state , federal , and private sector organizations that work together to improve the understanding of events related to the Earth 's atmosphere . Norman lies within Tornado Alley , a geographic region where tornadic activity is particularly frequent and intense . The Oklahoma City metropolitan area , including Norman , is the most tornado @-@ prone area in the world . The Storm Prediction Center ( SPC ) , a branch of the National Oceanic and Atmospheric Administration ( NOAA ) is located at the NWC . SPC forecasts severe storm and tornado outbreaks nationwide . Additionally , research is conducted at the co @-@ located National Severe Storms Laboratory ( NSSL ) , which includes field research and operates various experimental weather radars . 

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 Location changed 1 October 1996 to Oklahoma City . 

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 Though Oklahoma is placed entirely in the Southern United States by the United States Census Bureau , Tulsa is influenced by the nearby Southwest , Midwest , and Southern cultural regions , as well as a historical Native American presence . These influences are expressed in the city 's museums , cultural centers , performing arts venues , ethnic festivals , park systems , zoos , wildlife preserves , and large and growing collections of public sculptures , monuments , and artwork . 
