EMB145 CREW GOES OFF RWY AFTER LANDING IN STRONG CROSS WINDS.

Narrative

I WAS THE FO ON FLT X. I WAS THE PNF. EVERYTHING IN CRUISE AND DURING THE DSCNT INTO ZZZ SEEMED NORMAL. WE MADE THE DECISION TO LAND. THE CAPT LANDED WHAT I OBSERVED TO BE ON CTRLINE AND STARTED TO DECELERATE THE ACFT. AS THE AIRPLANE SLOWED; IT MOVED FURTHER TO THE R SIDE OF THE RWY. AS THE SITUATION DEVELOPED; I ASSISTED THE CAPT WITH THE CTL YOKE AND RUDDER PEDALS. THE AIRPLANE DEPARTED THE RWY TO THE R. WE THEN RAN THE GND EVAC CHKLIST AND SECURED ACFT. THERE WERE NO INJURIES TO CREW OR PAX WHEN QUESTIONED AT SCENE AFTER THE INCIDENT. I FEEL THE EVENT OCCURRED DUE TO HIGH WINDS. SUPPLEMENTAL INFO FROM ACN 729073: THIS INFO IS GIVEN TO THE BEST OF MY ABILITY AND RECOLLECTION. I WAS PF ON FLT X; CLRED FOR THE VISUAL. AT APPROX 2 MI FINAL; RECEIVED WIND RPT FROM TWR. I DETERMINED WINDS WERE WITHIN LIMITS. AT APPROX 150 FT; I ALIGNED THE ACFT WITH THE RWY AND PROCEEDED TO LAND. I TOUCHED DOWN IN THE TOUCHDOWN ZONE; ON GS; ON CTRLINE; AND ON SPD. UPON LOWERING THE NOSE; THE ACFT STARTED TO MOVE TO THE R. DESPITE MAX CTL INPUT; I WAS UNABLE TO REGAIN DIRECTIONAL CTL. ACFT DEPARTED THE RWY. MINOR DAMAGE TO ACFT AND ARPT PROPERTY. CALLBACK CONVERSATION WITH RPTR ACN 729071 REVEALED THE FOLLOWING INFO: NO POST FLIGHT FAULTS WITH THE ACFT FLIGHT CONTROLS WERE DISCOVERED. HE DOES BELIEVE THAT THE RUDDER HARD OVER PROTECTION SYSTEM MAY HAVE PLAYED A PART IN THIS INCIDENT.