What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
Pilot reported after verifying weather condition before departure, wind speed and direction changed, however, not enough to choose alternate airport. During tower communication, controller indicated wind speed and direction changed. Wind reported 12-15 knots @ direction 120 degrees, controller suggested runway 15 and PIC agreed. Pilot reported during final approach controller reported wind changed direction to 100 degrees. During final flare and power back, wind gust lifted the left wing. Pilot attempt to correct with control input as airplane departed the runway hitting a runway lighted sign. The airplane come to a full stop.
As the FAA filed it
PILOT REPORTED AFTER VERIFYING WEATHER CONDITION BEFORE DEPARTURE, WIND SPEED AND DIRECTION CHANGED, HOWEVER, NOT ENOUGH TO CHOOSE ALTERNATE AIRPORT. DURING TOWER COMMUNICATION, CONTROLLER INDICATED WIND SPEED AND DIRECTION CHANGED. WIND REPORTED 12-15 KNOTS @ DIRECTION 120 DEGREES, CONTROLLER SUGGESTED RUNWAY 15 AND PIC AGREED. PILOT REPORTED DURING FINAL APPROACH CONTROLLER REPORTED WIND CHANGED DIRECTION TO 100 DEGREES. DURING FINAL FLARE AND POWER BACK, WIND GUST LIFTED THE LEFT WING. PILOT ATTEMPT TO CORRECT WITH CONTROL INPUT AS AIRPLANE DEPARTED THE RUNWAY HITTING A RUNWAY LIGHTED SIGN. THE AIRPLANE COME TO A FULL STOP.