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


ELWHA RANGER STN, WASHINGTON (452548)
Temp F Earliest 90% 80% 70% 60% 50% 40% 30% 20% 10% Latest
36.5 04/11 04/20 05/01 05/05 05/10 05/13 05/18 05/20 05/25 06/01 07/03
32.5 03/16 03/26 04/02 04/07 04/11 04/18 04/22 04/27 05/04 05/11 06/02
28.5 01/09 02/03 02/09 02/15 02/28 03/04 03/04 03/06 03/14 03/23 04/20
24.5 **/** **/** **/** 01/19 01/26 02/01 02/08 02/13 02/27 03/04 03/11
20.5 **/** **/** **/** **/** **/** **/** 01/09 01/30 02/09 02/26 03/11
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