Spring 'Freeze' Probabilities (Jan 1 - Jul 31)


CORVALLIS WATER BUREAU, (351877)
Temp F Earliest 90% 80% 70% 60% 50% 40% 30% 20% 10% Latest
36.5 04/19 05/01 05/06 05/10 05/13 05/19 05/22 05/25 05/27 05/30 06/05
32.5 03/14 04/09 04/13 04/19 04/23 04/28 04/30 05/04 05/12 05/19 06/01
28.5 **/** 01/21 02/03 02/10 02/16 02/28 03/10 03/14 03/26 04/03 05/01
24.5 **/** **/** **/** 01/02 01/19 01/30 02/02 02/05 02/15 02/24 04/04
20.5 **/** **/** **/** **/** **/** 01/06 01/14 01/27 02/04 02/14 03/01
Graphic Output
 Earliest - Earliest date when a minimum temperature below the threshold occurred.
            **/** means there has been a year when the minimum temperature didn't
                  go below the threshold temperature during the Jan. 1 to July 31 
                  period or that there was insufficient data to determine a 
                  date.

xx% - Percent probability that a minimum temperature below the threshold will occur on or after the given date. **/** means non-occurrence of the threshold or insufficient data to determine a threshold.
Latest - Latest date when a minimum temperature below the threshold occurred. **/** means there has never been a year when the minimum temperature went below the threshold temperature during the Jan. 1 to July 31 period or insufficient data to determine a date. 07/30 means the minimum temperature can go below the threshold temperature any day during the Jan. 1 to July 31 period.

Western Regional Climate Center, wrcc@dri.edu