Rainy autocrosses are more fun than dry ones. Slippy pavement = better learning experience. Rain removes horsepower from the equation and promotes smooth driving.
Sunday: A chance of showers, with thunderstorms also possible after 8am. Cloudy, with a high near 82. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
We'd stop during the thunderstorms of course.
Jon