The Great Plains, the Midwest, the Mississippi Valley and the southern United States are all areas that are vulnerable to tornadoes. They are relatively rare west of the Rockies and are also less frequent in the northeastern states. Tornado Alley is a colloquial term for an area particularly prone to tornadoes.
GCIDE(0.00 / 0 votes)Rate this definition: 1  Limpid(a.) Clear and unambiguous; lucid; easy to understand; -- of speech and writing; as, limpid prose. 2  Limpid(a.) Calm, untroubled, and without worry; serene.
Freebase (0.00 / 0 votes) Rate this definition: Limpet. Limpet is a common name for a number of different groups of sea snails and freshwater snails. The common name is applied to those snails that have a simple shell which is broadly conical in shape, and either is not spirally coiled, or appears not to be coiled in the adult snail.