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


WALLA WALLA 13 ESE, (358985)
Temp F Earliest 90% 80% 70% 60% 50% 40% 30% 20% 10% Latest
36.5 05/06 05/14 05/26 06/02 06/06 06/08 06/15 06/27 07/02 07/06 07/28
32.5 04/16 05/05 05/07 05/13 05/15 05/19 05/20 05/25 05/31 06/02 06/30
28.5 03/16 04/04 04/09 04/14 04/18 04/20 04/29 05/01 05/05 05/12 05/22
24.5 02/07 03/05 03/12 03/12 03/16 03/20 03/26 03/28 04/08 04/15 05/06
20.5 01/28 02/03 02/06 02/16 02/22 03/04 03/07 03/13 03/22 03/29 05/01
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