Unlike earlier in the week when a possibility of showers was in the forecast for Louisville, Ky., on Saturday, the latest predictions call for partly sunny, cool and dry conditions for the 132nd Kentucky Derby presented by Yum! Brands (gr. I).According to weather.com, there is only a 10% chance of precipitation with a high of 68 degrees Saturday. The overnight low is forecast to be 50 degrees.Similar conditions were expected for Friday, when the 132nd Kentucky Oaks (gr. I) will be run. With a 20% chance of rain, the Friday high temperature is forecast to be 73 degrees, with an overnight low of 52.