THE PRIVATE PLT AND HIS FAMILY, WERE MAKING AN X-COUNTRY FLIGHT. THE PLT REPORTED AN APPROACH TO RWY 27, A 6,900 X 75 FT, ASPHALT RWY, WITH WINDS ESTIMATED FROM 315 DEGREES AT 15 KNOTS. ACCORDING TO THE PLT, THE AIRPLANE ENCOUNTERED A 'GUST FROM BELOW'. THE PLT DESCRIBED LOW LEVEL TURBULENCE AND SAID HE LOST TRACK OF THE AIRSPEED. HE SAID HE HEARD THE STALL HORN AND THE AIRPLANE FELL ABOUT 10 FT TO THE GROUND.