Narrative:

After a normal approach and landing; the aircraft suddenly veered left across the runway. I momentarily recovered control of the aircraft again and again it suddenly veered to the left off the runway. I was unable to recover control of the aircraft back onto the runway. The aircraft struck a taxi identifier sign and a taxi light. The aircraft received some minor damage to the left wing and the propeller.since a glider service was towing gliders aloft from that runway and other aircraft were landing/departing that same runway; I assumed this runway would be the active runway for the airport. A windsock is located on the terminal building and showed a minimal crosswind at the airport. After the incident the pilot and passenger could feel no crosswind after disembarking from the aircraft. At the time; we were told that an aircraft had landed minutes before and had a similar runway incident.I would appear that a gust of wind off nearby hills caused my aircraft and others to be pushed left across runway 32. It would probably help others; in the future; to have a windsock located near the touchdown point of runway 32.

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Original NASA ASRS Text

Title: General aviation pilot reports losing control during landing roll and departing the runway; possibly due to an undetected crosswind.

Narrative: After a normal approach and landing; the aircraft suddenly veered left across the runway. I momentarily recovered control of the aircraft again and again it suddenly veered to the left off the runway. I was unable to recover control of the aircraft back onto the runway. The aircraft struck a taxi identifier sign and a taxi light. The aircraft received some minor damage to the left wing and the propeller.Since a glider service was towing gliders aloft from that runway and other aircraft were landing/departing that same runway; I assumed this runway would be the active runway for the airport. A windsock is located on the terminal building and showed a minimal crosswind at the airport. After the incident the pilot and passenger could feel no crosswind after disembarking from the aircraft. At the time; we were told that an aircraft had landed minutes before and had a similar runway incident.I would appear that a gust of wind off nearby hills caused my aircraft and others to be pushed left across Runway 32. It would probably help others; in the future; to have a windsock located near the touchdown point of Runway 32.

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.