A DUI is a more serious offense than a DWI, although both still carry heavy consequences, fines, and the possibility for jail time. DWI stands for Driving While Intoxicated, and is the offense charged with when the BAC of the driver is found to be between .07 and .08 for persons driving age 21 and older. A DWI arrest may occur if a driver blows just below the legal limit but exhibits behavior under a police officer’s detection or field sobriety test that showcases a dangerous amount of impairment.