Length of 'Freeze Free' Season Probabilities


KALAMA FALLS HATCHERY, (454084)
Temp F Shortest 90% 80% 70% 60% 50% 40% 30% 20% 10% Longest
36.5 160 169 999 190 200 202 204 207 222 238 243
32.5 200 212 999 233 234 235 236 238 244 261 275
28.5 205 218 999 243 252 260 263 266 281 *** ***
24.5 205 239 999 300 307 332 *** *** *** *** ***
20.5 301 305 999 *** *** *** *** *** *** *** ***
Graphic Output
 Shortest - Least number of consecutive days recorded with minimum temperature 
            above threshold.
            *** means minimum temperature below threshold has not occurred.

xx% - Percent probability that a consecutive number of days will occur with the minimum temperature not below the threshold. *** means non-occurrence of the threshold
Longest - Greatest number of consecutive days recorded with minimum temperature above threshold. *** means that at least one year occurred when minimum temperature below threshold was not recorded. Note: All periods include August 1.

Western Regional Climate Center, wrcc@dri.edu