Date: 201901
Local time of day: 1201-1800
Location: ZZZ.Tower, US
Flight conditions: IMC
Weather elements / visibility: Snow
Aircraft: Super King Air 200
Operator: Air Taxi
Operating under: Part 135
Flight plan: IFR
Flight phase: Final Approach
Airspace: Class C ZZZ
ATC / advisory: Tower ZZZ
Reporter organization: Government
Reporter function: Local
Reporter qualification: Air Traffic Control Developmental
Human factors: Situational Awareness; Human-Machine Interface
Anomaly: ATC Issue All Types; Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance
Detector: Automation Air Traffic Control
When detected: In-flight
Result: Air Traffic Control Issued Advisory / Alert; Air Traffic Control Issued New Clearance; Flight Crew Executed Go Around / Missed Approach; General Flight Cancelled / Delayed
Contributing factors: Procedure; Weather; Airport; Human Factors; ATC Equipment / Nav Facility / Buildings
Primary problem: Weather

Narrative: Aircraft X was cleared for an ILS approach to Runway XXL. Runway XXR was closed for continuous snow removal and had snow removal vehicles operating on it. The weather was IMC with 1 mile visibility and snow. The approach end of both runways were not visible. I was the trainee in position in Local Control and cleared Aircraft X to land on Runway XXL which he read back. At about 1 mile final the AMASS (Airport Movement Area Safety System) issued a go-around instruction which I immediately relayed to the pilot. The aircraft was not visible yet on the ASDE (Airport Surface Detection Equipment)/AMASS display. The pilot immediately complied and executed a go around. After the pilot had began his missed approach I informed him of the reason for the go-around; that it appeared he was aligned with the wrong runway; and I asked him to verify that he had been established on the Runway XXL localizer. He replied something to the effect of that he was 'right of course'; which to me would imply he had indeed established himself on the Runway XXR localizer.During IFR weather and continuous snow removal; the approaches to XXL/XXR are frequently obscured. The radar display when zoomed out doesn't fully show whether the aircraft is aligned with the right runway; as the difference in position is only very subtle. Neither the Tower or TRACON observed the King Air lined up for the wrong runway. The AMASS essentially becomes the most useful layer of safety at that point. A recommendation that I have would be to give the Tower the ability to put an ILS system into standby/off when it is closed for snow removal. Currently we only have the ability to monitor the ILS; and can't change its functionality. If the ability to turn off the ILS to the occupied runway existed and was incorporated into the appropriate Runway close/open checklist; it would have prevented the King Air from picking up the wrong localizer. I would add that to the continuous snow removal Letter of Agreement as well. My other recommendation would be to require a closer distance setting on the radar display during IFR weather; which would help to more visibility indicate potential wrong runway alignments.




Synopsis: Local Controller reported issuing a go around to an aircraft that appeared to be on short final to a closed runway.