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


MACKAY RANGER STN, IDAHO (105462)
Temp F Earliest 90% 80% 70% 60% 50% 40% 30% 20% 10% Latest
36.5 05/19 06/09 06/17 06/20 06/23 06/27 06/30 07/02 07/09 07/16 07/30
32.5 05/07 05/22 05/29 06/02 06/07 06/09 06/13 06/16 06/23 07/01 07/16
28.5 04/03 05/01 05/05 05/09 05/14 05/19 05/22 05/26 05/31 06/07 06/30
24.5 04/02 04/17 04/22 04/28 05/01 05/02 05/05 05/09 05/12 05/19 05/28
20.5 03/23 04/03 04/07 04/11 04/15 04/22 04/26 04/30 05/03 05/07 05/16
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