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


LAKE YELLOWSTONE, WYOMING (485345)
Temp F Earliest 90% 80% 70% 60% 50% 40% 30% 20% 10% Latest
36.5 07/01 07/18 07/20 07/22 07/25 07/26 07/28 07/30 07/30 07/30 07/30
32.5 06/20 06/29 07/02 07/08 07/09 07/18 07/21 07/27 07/29 07/30 07/30
28.5 06/01 06/14 06/19 06/22 06/27 06/30 07/02 07/07 07/11 07/21 07/30
24.5 05/03 05/17 05/25 05/29 06/01 06/05 06/13 06/17 06/24 07/03 07/15
20.5 04/21 05/01 05/08 05/10 05/13 05/17 05/21 05/24 05/27 06/06 07/15
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