Narrative:

I was discussing changing the active runway with the local controller because of wind conditions; 020 at 15g20. We had a few larger aircraft inbound and they all like to use the longer runway so we stayed on runway xx for the time being. A VFR aircraft entered the VFR traffic pattern to land and full stop left traffic runway xx. We were wondering why the radar controller did not give him runway yy for the winds. I observed the aircraft on final with the binoculars to check gear down; next I hear the local controller tell the aircraft to enter left downwind for runway yy. The PA32 apparently slid off the runway and took out a light on his go around. I do not believe there were any reports of low level wind sheer (LLWS). This happened while we discussing changing the runway.

Google
 

Original NASA ASRS Text

Title: A Tower Controller described a runway excursion that occurred when traffic made a touch and go exiting the runway and hitting a light.

Narrative: I was discussing changing the active runway with the Local Controller because of wind conditions; 020 at 15g20. We had a few larger aircraft inbound and they all like to use the longer runway so we stayed on Runway XX for the time being. A VFR aircraft entered the VFR traffic pattern to land and full stop left traffic Runway XX. We were wondering why the RADAR Controller did not give him Runway YY for the winds. I observed the aircraft on final with the binoculars to check gear down; next I hear the Local Controller tell the aircraft to enter left downwind for Runway YY. The PA32 apparently slid off the runway and took out a light on his go around. I do not believe there were any reports of Low Level Wind Sheer (LLWS). This happened while we discussing changing the runway.

Data retrieved from NASA's ASRS site as of July 2013 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.