You try getting three levels of the French government (Federal, Regional and Departmental) together in eight minutes, when the storm is going to hit in ten. They missed this one.
I don't know of any Weather alerts that require 3 levels of government before sending out the info.
Even private weather websites send out info and alerts. Environment Canada, US National Weather Service, UK Met Office, Yr Norway, etc. don't need another department babysitting to do their job.
I doubt that France Meteo is unable to send out weather alerts without consultation.
Without a France Meteo official source link that says otherwise.. I still call BS.
The only official statement I have read is that the majority of the models forecasted the storm not making landfall in Corsica. (the specific story above says 1 model reportedly did). In avoiding sending out, what they initially felt was likely a false alert, they unfortunately waited until it was definitely going to hit land.