C206 LOW TIME PLT FLEW TO WX MINIMUMS THAT ACR PLTS ARE NOT ALLOWED TO AT OSU.

Narrative

I WAS ON AN IFR FLT PLAN FROM MQJ (INDIANAPOLIS) TO OSU (COLUMBUS; OH). I CHKED THE WX SEVERAL TIMES ONLINE AND VIA FLT SVC; OVER A CONCERN WITH POSSIBLE CONVECTIVE ACTIVITY THAT DAY ON MY FLT PATH EITHER GOING OR RETURNING. THE TRIP OVER WAS UNEVENTFUL. OSU ATIS RPTED MINUS 1/4 MI VISIBILITY. OSU TWR UPGRADED TO PLUS 1/4 MI VISIBILITY AND RPTED RVR 6000 FT AT CMH. I DID NOT HEED THAT CLUE AND MISINTERPED THE UPGRADE AS ABOVE MINIMUMS AND FLEW THE APCH TO 50 FT ABOVE THE MAP AND WENT MISSED. I COULD SEE THE ARPT AS I PASSED OVER IT. WITHOUT DOUBLE-CHKING MY VISIBILITY MINIMUM ASSUMPTION; I DECIDED TO MAKE A SECOND APCH; AND; IF MISSED; GO TO CMH. I ASKED FOR AND WAS GIVEN VECTORS FOR A SECOND TRY. THIS TIME I FLEW THE ILS TO THE MAP; BEGAN TO PUSH PWR FOR THE MISSED; SAW THE RWY CLRLY JUST OFF CTR TO THE R OF CTR AS I WAS KEYING THE MIKE TO ANNOUNCE THE MISSED; AND INSTEAD SAID 'THERE IT IS' AND LANDED CLEANLY. AS I TAXIED IN; I LOOKED ACROSS THE ARPT; THOUGHT TO MYSELF THAT ACTUAL VISIBILITY MUST EASILY BE TWICE THE MINIMUM; LOOK AT THE APCH PLATE AGAIN AND REALIZED WHAT I HAD JUST DONE. ANALYSIS: I HAD ALL NECESSARY INFO; NAVAIDS; KNOWLEDGE AND SKILL TO FLY SAFELY; FOLLOW THE RULES; AND; IN THIS CASE; LAND AT CMH. I MADE A SERIOUS ERROR WHICH; IN A MORE DEMANDING ENVIRONMENT; MAY HAVE BEEN DISASTROUS. I HAD MY WIFE AND DAUGHTER WITH ME; AND THANK GOD FOR PROVIDING SAFETY WHERE I DID NOT. WITH LOW TOTAL TIME; I HAD PURSUED THE ADDITIONAL TRAINING FOR MULTI/INST/COMMERCIAL NOT FOR EMPLOYMENT BUT TO BE A BETTER TRAINED AND SAFER PLT. THIS ERROR WAS AS STRONG A LESSON AS ANY FROM MY TRAINING; AND WILL BE WITH ME AS A SAFETY REMINDER DURING MY PRE-APCH REVIEW FOR EVERY IMC APCH I FLY FROM NOW ON.