I know it might be hard to tell from this picture, but the GFS shows the rain starting Thursday morning.
One more note, this pattern in October is defines one reason why I love weather. I simply love the change of weather from warm and cloudy to cool and clear. My feelings on this probably begin because I enjoy not being able to habitually love and experience one weather scene. Right now I love the fall, but in the spring I will tell you I love the spring.