30 year (1981 - 2010) annual average number of occurrences of dry and wet events for the Conterminous United States and District of Columbia
This metadata record describes the annual average number of occurrences of dry and wet events during the 30-year period 1981 – 2010 for the conterminous United States.  A wet event is defined as a period when the number of consecutive days with precipitation equals or exceeds 1 millimeter. A dry event is defined as a …