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


VERNONIA 2, o (358884)
Temp F Earliest 90% 80% 70% 60% 50% 40% 30% 20% 10% Latest
36.5 05/09 05/23 05/29 06/03 06/07 06/12 06/20 06/26 07/01 07/08 07/29
32.5 04/09 04/20 04/26 05/03 05/07 05/10 05/16 05/20 05/26 05/30 06/10
28.5 03/04 03/22 03/27 03/30 04/03 04/08 04/14 04/20 04/21 05/06 05/14
24.5 01/01 02/02 02/11 02/21 02/29 03/04 03/10 03/14 03/28 04/06 04/13
20.5 **/** **/** 01/07 01/18 01/31 02/04 02/10 02/22 02/26 03/03 03/25
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