The five largest three-day and four-day precipitation events from forts in western Washington and comparator GHCN-Daily stations.

The 14 Dec 1867 event is highlighted in bold. Data for Fort Steilacoom, Fort Canby, and Fort Vancouver were obtained from the Midwestern Regional Climate Center (see footnote for data pretreatment). Data for American Camp was entered from digital scans of handwritten ledgers. GHCN-Daily stations were downloaded from https://www.ncdc.noaa.gov/cdo-web/ Site locations are shown in Fig 1.