Just a thought
When our national weather service had not yet "upgraded" its system, the weather reports were, as I remember them, accurate enough to actually plan upon. In other words, if they said this week-end was going to see rain, you didn't plan a trip to the beach and, more often than not, they were right and you had no regrets. Well, sometimes you did, but more often you didn't.
Then they upgraded their system, and spanned their prediction time to 5 days, inserting a "confidence ratio" while they did it. It soon became obvious that, although they had more than doubled the computing capacity, they had also more than doubled the error margin.
Now, unless there are clear skies over half of Europe, we have trouble knowing whether or not it will rain tomorrow. Forget about a 5-day forecast - they haven't made one that actually panned out.
So what I'm asking is this : given the dismal failure France has already recorded in improving on its computing capacity, what steps are being taken to ensure that all this improved granularity isn't going to end up going the same way ?