Air Traffic Control Fully Certified
Distraction; Situational Awareness
ATC Issue All Types; Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance
Air Traffic Control Issued New Clearance
Human Factors; Weather
I was working Local Control during IFR weather. I was unable to see the runway or any aircraft on final. I was relying on the ASR (Airport Surveillance Radar) and the ASDE-X (Airport Surface Detection Equipment) for separation and safety. On short final; Aircraft X appeared to make a major correction to the north and this caught my attention Aircraft X showed up on the ASDE-X and appeared to be lined up on taxiway November. It took me a second to process what I was seeing; and I then instructed Aircraft X to go around.
ATL Tower Controller reported instructing an aircraft to go around after they appeared to line up with a taxiway in IFR conditions.