RWY EXCURSION OFF THE END OF RWY.

Narrative

WHILE DSNDING TO LAND AT REGINA; CANADA (CYQR); WE MONITORED THE ATIS. THE WX WAS RPTED AS 12000 SCATTERED VISIBILITY WAS BETTER THAN 15 MI AND THE TEMP WAS ABOUT 32 DEGS F. THE WIND WAS 180 DEG AT 5 KTS AND THERE WAS ALSO FROST RPTED ON ALL RWYS. SINCE THE WIND WAS LIGHT AND THERE WAS NO ICE ON THE RWYS; I DECIDED TO LAND ON RWY 8 INSTEAD OF THE ACTIVE RWY 13 BECAUSE IT WAS A STRAIGHT IN APCH. RWY 13 IS 7900 FT LONG AND RWY 8 IS 6200 FT LONG. APPROX 1 MI FROM THE THRESHOLD; THE ACFT BEGAN TO GET HIGH ON THE APCH. I REACTED BY REDUCING PWR AND LOWERING THE NOSE OF THE ACFT. I MANAGED TO KEEP THE ACFT ESTABLISHED ON GLIDE PATH; BUT THE SPD HAD INCREASED TO VREF PLUS 15 KTS. I CONTINUED TO REDUCE PWR TO BLEED OFF THE EXTRA SPD. WE CROSSED THE APCH END OF THE RWY AND I REDUCED THE PWR TO IDLE. HOWEVER; WITH THE EXTRA AIRSPD AND WITH A TAILWIND (APPROX 15 KTS) THAT I WAS UNAWARE OF; THE ACFT DID NOT TOUCH DOWN (AT VREF); UNTIL WE WERE APPROX 1/3 DOWN THE RWY. I IMMEDIATELY EXTENDED THE AIR BRAKES AND APPLIED THE BRAKES. INITIALLY THE BRAKING ACTION WAS NIL; THEN IT BEGAN TO IMPROVE. HOWEVER; I WAS UNABLE TO STOP IN TIME. PROBABLY DUE TO THE MELTING FROST CAUSED BY THE WARMING WIND. THE ACFT EXITED THE RWY END AT APPROX 60 KTS AND CAME TO REST ABOUT 100 YDS IN SNOW THAT WAS 6-8 INCHES DEEP. NO ONE WAS INJURED AND THE ACFT SUSTAINED NO DAMAGE.