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


DORA 2 W s, r (352370)
Temp F Earliest 90% 80% 70% 60% 50% 40% 30% 20% 10% Latest
36.5 04/24 05/03 05/12 05/13 05/15 05/20 05/23 05/26 05/30 06/10 06/26
32.5 03/14 03/25 04/09 04/18 04/23 04/29 05/04 05/08 05/13 05/19 05/25
28.5 01/14 01/23 02/03 02/03 02/10 02/18 03/02 03/06 03/12 03/25 04/02
24.5 **/** **/** **/** 01/06 01/26 02/01 02/03 02/03 02/09 02/10 03/08
20.5 **/** **/** **/** **/** **/** **/** **/** 01/09 01/16 02/04 02/08
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