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


WALLA WALLA RGNL AP, (458928)
Temp F Earliest 90% 80% 70% 60% 50% 40% 30% 20% 10% Latest
36.5 03/25 04/09 04/15 04/19 04/24 04/28 05/01 05/04 05/06 05/16 06/01
32.5 02/19 03/15 03/24 03/28 03/30 04/03 04/08 04/13 04/15 04/21 05/02
28.5 01/22 02/05 02/20 03/02 03/05 03/09 03/12 03/20 03/31 04/17 05/01
24.5 **/** 01/06 01/28 02/05 02/13 02/23 03/01 03/05 03/11 03/28 04/30
20.5 **/** **/** 01/05 01/12 01/29 02/03 02/08 02/14 02/28 03/10 04/19
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