Spring 'Freeze' Probabilities (Jan 1 - Jul 31)
HEADWORKS PORTLAND W, (353770)
| Temp F |
Earliest |
90% |
80% |
70% |
60% |
50% |
40% |
30% |
20% |
10% |
Latest |
| 36.5
| 03/28
| 04/22
| 04/26
| 04/30
| 05/04
| 05/06
| 05/10
| 05/17
| 05/24
| 05/28
| 07/16
|
| 32.5
| 02/05
| 03/17
| 03/25
| 03/29
| 04/04
| 04/09
| 04/13
| 04/19
| 04/24
| 05/04
| 07/16
|
| 28.5
| **/**
| 01/08
| 01/26
| 02/04
| 02/17
| 02/21
| 02/29
| 03/06
| 03/15
| 03/26
| 05/01
|
| 24.5
| **/**
| **/**
| **/**
| 01/05
| 01/15
| 01/26
| 02/02
| 02/09
| 02/15
| 03/01
| 03/29
|
| 20.5
| **/**
| **/**
| **/**
| **/**
| **/**
| **/**
| 01/12
| 01/29
| 02/02
| 02/13
| 03/05
|
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