Length of 'Freeze Free' Season Probabilities
PORTLAND KGW TV, ta (356749)
Temp F |
Shortest |
90% |
80% |
70% |
60% |
50% |
40% |
30% |
20% |
10% |
Longest |
36.5
| 183
| 195
| 204
| 213
| 221
| 229
| 234
| 249
| 251
| 259
| 289
|
32.5
| 226
| 241
| 253
| 261
| 274
| 286
| 292
| 301
| 311
| ***
| ***
|
28.5
| 268
| 290
| 299
| 320
| 335
| ***
| ***
| ***
| ***
| ***
| ***
|
24.5
| 315
| 339
| ***
| ***
| ***
| ***
| ***
| ***
| ***
| ***
| ***
|
20.5
| ***
| ***
| ***
| ***
| ***
| ***
| ***
| ***
| ***
| ***
| ***
|
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