title: Lunar Synodical Period and Widespread Precipitation.
abstract: Precipitation activity over broad areas appears to be closely associated with the monthly lunisolar cycle. Indexes of precipitation in the continental United States over a continuous 50-year period, and 91-year daily histories of individual stations, reveal that heavy rains occur most frequently in the first and third weeks of the synodical month.
authors.forename: D A
authors.initials: DA
authors.lastname: Bradley
authors.forename: M A
authors.initials: MA
authors.lastname: Woodbury
authors.forename: G W
authors.initials: GW
authors.lastname: Brier