Narrative:

I received a call from [the aircraft] requesting taxi for departure. I taxied [the aircraft] to the nearest runway and upon receiving a release from the TRACON; cleared [the aircraft] for takeoff on the standard climb out. Shortly after departure; I was contacted by the departure controller who asked which runways we were using. Only then did I realize what we were advertising and I had departed [the aircraft] opposite direction without coordination.I think there were a few factors in play. Expectation bias. The aircraft's destination was north; and the runway I assigned was by far the most convenient point for departure from a taxi standpoint. Normally this would have been stopped by any of a few factors; none of which were present here. Calling the aircraft to the center flight data but data was closed; prevailing winds (winds had been calm all night); or existing traffic to the advertised runway (I had one VFR aircraft landing on a crosswind runway; and had not spoken to another aircraft all night).although I did not feel especially tired; having rested both before and during the shift; it would be foolish to suggest that fatigue had nothing to do with an error occurring during a mid-shift; especially during the final hour of a mid-shift. I was preoccupied with sequencing my only other aircraft; such that [this particular aircraft] could be departed without delaying for a slow VFR arrival.the biggest problem; at least in my mind; was the lack of a convenient indicator of which runway was in use during a low-traffic period where no other indicators were present to suggest the runway in use. The information display system-4 in the cab displays this information; but does so in small text directly behind the local controller on the opposite side of the cab. I believe any formally instituted visual aid or similar device that would have prevented this would be a hindrance during normal operations. Instead; I will write pertinent information on a flight strip in the future; such that it will be readily visible if these conditions recur.

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Original NASA ASRS Text

Title: A Tower Controller reported they allowed an aircraft to depart a different runway than what was coordinated with the TRACON.

Narrative: I received a call from [the Aircraft] requesting taxi for departure. I taxied [the Aircraft] to the nearest runway and upon receiving a release from the TRACON; cleared [the Aircraft] for takeoff on the standard climb out. Shortly after departure; I was contacted by the departure controller who asked which runways we were using. Only then did I realize what we were advertising and I had departed [the Aircraft] opposite direction without coordination.I think there were a few factors in play. Expectation bias. The aircraft's destination was north; and the runway I assigned was by far the most convenient point for departure from a taxi standpoint. Normally this would have been stopped by any of a few factors; none of which were present here. Calling the aircraft to the Center flight data but data was closed; prevailing winds (winds had been calm all night); or existing traffic to the advertised runway (I had one VFR aircraft landing on a crosswind runway; and had not spoken to another aircraft all night).Although I did not feel especially tired; having rested both before and during the shift; it would be foolish to suggest that fatigue had nothing to do with an error occurring during a mid-shift; especially during the final hour of a mid-shift. I was preoccupied with sequencing my only other aircraft; such that [this particular Aircraft] could be departed without delaying for a slow VFR arrival.The biggest problem; at least in my mind; was the lack of a convenient indicator of which runway was in use during a low-traffic period where no other indicators were present to suggest the runway in use. The Information Display System-4 in the cab displays this information; but does so in small text directly behind the local controller on the opposite side of the cab. I believe any formally instituted visual aid or similar device that would have prevented this would be a hindrance during normal operations. Instead; I will write pertinent information on a flight strip in the future; such that it will be readily visible if these conditions recur.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.