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Oregon Snow Survey Program
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Surface Water Supply Index (SWSI)
CURRENT SWSI
View Oregon SWSI map for all basins for the selected month & year:
Year:
2010
2009
2008
2007
2006
2005
2004
Month:
January
February
March
April
May
June
July
August
September
October
November
December
Click on a basin below to view the 3-year SWSI graph for that basin:
Alternative Access to SWSI Graphs:
North Coast
South Coast
Willamette
Rogue/Umpqua
Lower Deschutes/Mt. Hood
Upper Deschutes
Klamath
Umatilla
Upper John Day
Lake
Harney
Grande Ronde/Powder/Burnt
Malheur
Owyhee
Download comma-delimited file of all historic SWSI values