A wise man said, "You fly where the weather lets you fly."
So if your plan was to fly exactly that route no matter what, then you did the right thing not to go.
However, if you are prepared that at any time circumstances(weather) may impede your progress, and you are prepared to circumnavigate Cbs or hold off while a shower clears the field, then you missed a lovely day flying. I wasn't at the airfield looking at the sky so I've no idea what it was really like.
It's your shout.
Just as an aside, PROB(30-40) TEMPO are disregarded in airline terms.