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


BOISE LUCKY PEAK DAM, (101018)
Temp F Earliest 90% 80% 70% 60% 50% 40% 30% 20% 10% Latest
36.5 05/07 05/12 05/13 05/19 05/22 05/25 05/27 05/31 06/05 06/08 06/17
32.5 04/04 04/15 04/27 05/01 05/05 05/07 05/14 05/17 05/19 05/25 06/04
28.5 03/16 03/18 04/03 04/05 04/09 04/10 04/13 04/17 04/20 05/01 05/04
24.5 02/06 02/22 03/04 03/09 03/10 03/17 03/26 04/04 04/08 04/17 05/01
20.5 01/11 01/23 02/06 02/11 02/19 02/24 03/04 03/08 03/13 03/16 04/01
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