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Oregon Precipitation, 1885-1995
by Larry Walker

During the last few years before I retired from the Bureau of Land Management (BLM), I maintained and distributed a monthly summary of the distribution of precipitation in Oregon.  This information was distributed under a "technical advisory" called Weather Watch.  The advisory basically consisted of repackaging data from the Oregon Climate Service into a format that was more useful as a tool in public land management. In conjunction with maintaining Weather Watch, I developed some companion items based on historical data to facilitate a better understanding of just where various aspects of present ecosystems are relative to the historic.  These were pulled together into a series called Weather Watch Companions which are specified below.


Graphic Companion #1: Oregon Water Year Precipitation. 1981-1995. A run-time computer slide show with a water year precipitation map for each year and multi-year summary graphs for water year precipitation, cumulative effects, and 10-year accumulated surplus or deficit. Includes *.SHW file that can be used with WordPerfect Presentations. Paper handout with 12 color slides per page also available.

Graphic Companion #2: Eastern Oregon Water Year Precipitation, 1885-1995. A run-time computer slide show with a water year precipitation map for each year and multi-year summary graphs for water year precipitation, cumulative effects, and 10-year accumulated surplus or deficit. Includes *.SHW file that can be used with WordPerfect Presentations. Paper handout with 12 color slides per page also available. Click here for an on-line presentation of that handout.

Graphic Companion #3: Eastern Oregon Water Year Precipitation & Cumulative Effects, 1885-1995. A booklet with side-by-side color maps of water year precipitation and cumulative effects for each year. Three years (six maps) per page. Also available on disk in WordPerfect *.WPD format. Click here to view or download a PDF (2mb) copy of this report.

Chart Companion #1: Western Oregon Watershed Summaries, 1981-1995. Three multi-year charts for western Oregon and each watershed in western Oregon. (1) water year precipitation, (2) cumulative effects, (3) 10-year accumulated surplus or deficit. Watersheds correspond to those in 1988 Oregon Statewide Assessment of Nonpoint Sources of Water Polution, Oregon Department of Environmental Quality.

Chart Companion #2: Eastern Oregon Watershed Summaries. 1885-1995. Three multi-year charts for eastern Oregon and each watershed in eastern Oregon. (1) water year precipitation, (2) cumulative effects, (3) 10-year accumulated surplus or deficit. Watersheds correspond to those in 1988 Oregon Statewide Assessment of Nonpoint Sources of Water Polution, Oregon Department of Environmental Quality.

Spreadsheet Companion #1: Western Oregon Watershed Summaries, 1981-1995. An electronic spreadsheet of the data and charts used to produce Chart Companion #1.

Spreadsheet Companion #2: Eastern Oregon Watershed Summaries, 1885-1995. An electronic spreadsheet of the data and charts used to produce Chart Companion #2.


Those interested in specific Companions should still be able to obtain them from Ron Halvorson at BLM's Prineville District.  BLM District contact information is available through BLM's Oregon/Washington Home Page. Monthly editions of Weather Watch are now also available at that home page.