From Glossary of Meteorology
(Also spelled labé.) A moderate to strong southwest wind in Provence (southeastern France), mild, humid, and very cloudy or rainy.
On the coast it raises a rough sea. It is not frequent, occurring only in March. In the Swiss– French Alps it is locally termed labech, and is squally with thunder, hail, and brief torrential downpours; it comes mainly in autumn and winter.