A C210 PLT LANDED GEAR UP FOLLOWING A VFR APCH IN THUNDERSTORM ACTIVITY.

Narrative

ALT 6000 FT FOR LNP ARR WITH TRI CITIES ATC THROUGH EMBEDDED THUNDERSTORMS WITH MODERATE TO SEVERE TURB (1500 FT VERTICAL ASCENT RATE IN THUNDERSTORMS). TURNED OVER TO INDY ATC. FINALLY ALLOWED DSCNT BELOW ALT 5000 FT IN MODERATE VFR RAIN. STRESSED DUE TO THUNDERSTORM ACTIVITY. FIELD IN SIGHT: CHOSE RWY 24 STEEP DSCNT PROFILE TO THRESHOLD. RAISED NOSE TO DROP AIRSPEED TO GEAR RETRACTION SPEED; INADVERTENTLY LOWERED FLAPS INSTEAD OF GEAR. REALIZED GEAR UP UPON TOUCHDOWN. CTRLINE LNDG; SKIDDED OFF RWY INTO GRASS. NO INJURIES; NO STRUCTURAL DAMAGE. LIFTED ACFT WITH HEAVY EQUIPMENT AND LOWERED GEARS. REMOVED ACFT FROM RWY ENVIRONMENT AT XA30 THAT EVENING AS INSTRUCTED. I HAVE MODIFIED ALL OF MY CHKLISTS FOR QUICK REF AND USE. MOST OF ALL; THE TRUE LESSON LEARN IS THAT I SHOULD HAVE GONE AROUND TO THE OPPOSITE THRESHOLD AND USED THE TIME TO CHECK ALL CONFIGURATIONS INSTEAD OF TRYING TO LAND THE ACFT IN A STRESSED SIT. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATED THE ONLY ACFT DAMAGE WAS A PROP AND ENGINE.