The storm will hit in the late afternoon and early evening, while the majority of the rest of France will be enjoying a late warm and sunny night (see map below).
By late evening, however, the hail storms are forecast to hit, marked by the letter G in the map below. These storms will remain throughout most of the night and into the early morning, gradually spreading south along France's Atlantic coast.
And it's bad news for the rest of the country on Thursday, as the storms will push towards the east throughout the day. The map below shows France in the early evening on Thursday.
(All photos and maps: Météo France)
The weather forecast is also bad news for stargazers, with Wednesday night said to be the best opportunity to see this year's Perseid meteor shower (if only the weather remains clear).
If you're in a part of France without clouds, here are some tips to catch what's been dubbed as one of the best celestial events in years.