Length of 'Freeze Free' Season Probabilities


KETCHIKAN INTL AP, s (504590)
Temp F Shortest 90% 80% 70% 60% 50% 40% 30% 20% 10% Longest
36.5 88 111 125 132 138 143 145 149 156 166 190
32.5 88 147 156 166 174 179 184 189 194 206 228
28.5 103 178 206 216 221 229 234 238 248 259 ***
24.5 138 223 235 244 250 266 278 298 308 *** ***
20.5 153 243 268 275 282 298 309 *** *** *** ***
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