Big Rain Events in the Southeast

A Big Rain event is the occurrence of two or more inches of rain in a two-day period. The number of such events varies by month and ENSO phase. Knowledge of the probability of the number of Big Rain events aids the planning of procedures to address impacts on water supply and resulting runoff.

The map below assists the display of graphs of probabilitites of the number of Big Rain events during the various months and ENSO phases. Click on the icon at a particular station. An information box will be displayed. Within this box are further links to (1) graphs of the annual variation of probabilitites of one/two or more events and (2) monthly probabilities of the number of events as related to ENSO phases.