Length of 'Freeze Free' Season Probabilities
HEADWORKS PORTLAND W, (353770)
| Temp F |
Shortest |
90% |
80% |
70% |
60% |
50% |
40% |
30% |
20% |
10% |
Longest |
| 36.5
| 60
| 127
| 145
| 153
| 159
| 163
| 167
| 174
| 182
| 197
| 219
|
| 32.5
| 64
| 181
| 190
| 201
| 208
| 216
| 225
| 232
| 240
| 252
| 302
|
| 28.5
| 203
| 230
| 244
| 266
| 275
| 291
| 302
| 319
| ***
| ***
| ***
|
| 24.5
| 244
| 281
| 309
| 337
| ***
| ***
| ***
| ***
| ***
| ***
| ***
|
| 20.5
| 252
| 323
| ***
| ***
| ***
| ***
| ***
| ***
| ***
| ***
| ***
|
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