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


MC NARY DAM, : (355389)
Temp F Earliest 90% 80% 70% 60% 50% 40% 30% 20% 10% Latest
36.5 04/24 05/05 04/25 05/20 04/29 05/01 05/03 06/09 05/08 07/06 05/11
32.5 04/01 04/10 04/11 04/20 04/23 04/25 04/26 05/10 04/30 05/25 05/02
28.5 03/28 02/12 03/29 03/11 04/01 04/05 04/09 04/06 04/24 04/22 05/02
24.5 02/14 **/** 03/04 01/17 03/14 03/18 03/25 02/15 04/24 03/12 05/01
20.5 **/** **/** **/** **/** 02/05 02/10 02/15 02/01 03/08 02/25 03/30
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