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


PROSSER st, (456768)
Temp F Earliest 90% 80% 70% 60% 50% 40% 30% 20% 10% Latest
36.5 04/01 05/02 05/08 05/14 05/16 05/19 05/25 05/29 06/01 06/05 06/24
32.5 02/26 04/09 04/20 04/25 04/29 05/04 05/06 05/09 05/12 05/22 06/24
28.5 02/22 03/14 04/02 04/07 04/11 04/14 04/19 04/21 04/25 04/29 05/08
24.5 01/11 02/22 03/06 03/12 03/17 03/20 03/26 04/02 04/07 04/15 04/26
20.5 **/** 01/14 02/03 02/08 02/15 02/21 03/05 03/10 03/20 03/26 04/20
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