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Scientific Investigations Report 2007–5117

U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2007–5117

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Table 3. Ranking of years from warmest to coolest spring based on cumulative degree-days from April 1 to May 15, Upper Klamath Lake, Oregon, 1990–2006.

Cumulative degree-days
from April 1 to May 15		 Year
513 1992
470 1990
449 1997
440 1994
424 1996
392 2000
390 2004
381 2006
374 1993
336 2001
336 1995
333 2002
325 1998
318 2005
296 1991
286 1999
227 2003

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