Glenmore-Ellison Improvement District, and its predecessors, the Ellison Irrigation District and the Glenmore Irrigation District, have been maintaining snow records at specific locations near Postill Lake since the early 1930's. These records are normally taken each year near the end of January, February, March and April, and then called in to the Water Management Branch of the BC Ministry of Environment, Lands & Parks.
For the historical data, please visit the government website for the BC River Forecast at bcrfc.env.gov.bc.ca and click on Data & Graphs>Archive Snow survey. The data for the Postill Lake Snow Course is under Course No. 2FG07.