CARJ FLT CREW FLIES DEN TO STL IN INCLEMENT WX. LAND SAFELY AT DEST. PAX AND FLT CREW FROM ANOTHER CARRIER RPTS THE FLT WAS CONDUCTED IN UNSUITABLE WX CONDITIONS.

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THE FLT OCCURRED BECAUSE A RELEASE WAS ISSUED AND WX WAS ACCEPTABLE FOR THE FLT. RECEIVED PAPERWORK RELEASE FOR THE FLT FROM DISPATCH IN DENVER; CO; AROUND XA00 PM; NOV/XA/06. FLT WOULD FINISH IN ST LOUIS; MO. DENVER WX WAS CLR AND NO DEICE PROCS WERE NEEDED. ENRTE NOTHING ABNORMAL WAS NOTED OR EXPECTED; UNEVENTFUL CRUISE FLT. TERMINAL WX FOR ST LOUIS CALLED FOR A RWY CHANGE FROM RWY 30L TO RWY 29 A 9001 FT LONG SURFACE. WE WERE INFORMED BY TWR ON APPROX A LONG R DOWNWIND LEG THAT GND CREWS HAD JUST SWEPT AND APPLIED DEICE TO RWY 29. WX AS I RECALL WAS 900 FT OVCST 3 MI VISIBILITY AND LIGHT WINDS 290 DEGS AT 10 KTS. THE DSCNT INTO THE RWY HAD SMALL AREAS OF HVY SNOW AROUND 7000 FT MSL. FURTHER DSCNT TO THE RWY ENCOUNTERED LIGHT PRECIP AND NO WING ICE WAS COLLECTED. THE CAPT WAS FLYING THE APCH AND WE IDENTED THE RWY ENVIRONMENT; THE SURFACE WAS SLIPPERY AND THE ACFT CAME TO A STOP WITH MORE THAN 4500 FT OF RWY REMAINING; ON THE CTRLINE. TAXIED IN AND A POSTFLT INSPECTION WAS ACCOMPLISHED WHERE NO ACCUMULATION OF ICE WAS DETECTED ON ANY SURFACE. RECEIVED A PHONE CALL FROM THE CAPT; THE CAPT OF THE FLT; THAT HE HAD BEEN NOTIFIED THE FAA WAS INVESTIGATING THE FLT. THE ISSUE WAS IDENTED TO ME ON DEC/XA/06 AT LCL TIME; THAT THE FAA MIGHT BE INVESTIGATING THE FLT? THEN PROCEEDED TO FILL OUT THE RPT. ALL WENT WELL I CAN'T THINK OF A SUGGESTION. SUPPLEMENTAL INFO FROM ACN 719050: THE WX FORECAST FOR THE TIME OF ARR (WHICH WAS DELAYED) SHOWED CONTINUING MODERATE FREEZING RAIN AND ICE PELLETS. MY ASSUMPTION WHEN THE FLT TOOK OFF WAS THAT IT WOULD ONLY MAKE AN APCH INTO STL IF THE WX IMPROVED ABOVE FORECAST AND WOULD OTHERWISE HOLD/DIVERT AS NEEDED. THE FLT; HOWEVER; DID NOT HOLD/DIVERT AND WENT DIRECTLY INTO STL. I WAS IN THE CABIN BUT THE VIEW OUTSIDE WAS QUITE ALARMING WHEN WE DID ARRIVE AND I WAS SHOCKED TO SEE THAT THE FLT HAD INDEED LANDED DURING MODERATE FREEZING RAIN AND ICE PELLETS.