Explaining Region Wide Tier

Region Wide Episode Rankings

Combined Cities of North Bend(1902-present)/Langlois(1893-1901) 
& Grants Pass(1893-present). Mean of cold days, mean temp, cold 
high, and cold low. First day of cold spell in Bellingham and 
last day of cold spell in Portland or Bellingham.

1888 Jan 01-23. Estimated from Portland records & old 500 heights maps.

1887 Jan 29 - Feb 14. Estimated from Portland records & old 500 heights maps.

1972 Dec 02-16.  7 days/25.4F mean temp/CHM: 25 CLM: 7
5th-12th   37.85 score. 

1990 Dec 18-25.  5.5 days/25.9F mean temp/CHM: 21 CLM: 8
20th-26th  36.60 score. 

1889 Dec 30 - 1890 Jan 13. Estimated from Portland records & old 500 heights maps.

1932 Dec 06-16. 5.5 days/26.6F mean temp/CHM: 27 CLM: 9
8th-15th   34.15 score. 

1930 Jan 02-29. 6.5 days/27.0F mean temp/CHM: 31 CLM: 8
7th-15th   34.00 score. 

1998 Dec 19-24.  4 days/26.9F mean temp/CHM: 29 CLM: 13
20th-24th  30.85 score.

1962 Jan 16-23. 5.5 days/30.6F mean temp/CHM: 28 CLM: 9
17th-24th  29.90 score. 

1949 Jan 07-15. 4 days/27.2F mean temp/CHM: 34 CLM: 12
9th-13th   29.55 score. 

1989 Feb 03-06. 4 days/28.0F mean temp/CHM: 31 CLM: 13 
2nd-6th    29.25 score. 

1950 Jan 23 - Feb 05. 3.5 days/28.2F mean temp/CHM: 33 CLM: 12
29th-3rd   28.30 score. 

2013 Dec 04-11.  5.5 days/30.0F mean temp/CHM: 32 CLM: 15 
4th-12th   28.00 score. 

1919 Dec 08-16. 3.5 days/29.1F mean temp/CHM: 34 CLM: 10
12th-16th  27.65 score. 

1957 Jan 17-30. 5 days/29.4F mean temp/CHM: 33 CL: 16
25th-30th  27.60 score. 

1936 Dec 29 - 1937 Jan 24. 7.5 days/33.6F mean temp/CHM: 31 CL: 13
1st-21st   27.15 score. 

1913 Jan 04-07. 2 days/26.3F mean temp/CHM: 36 CLM: 16
5th-6th    26.95 score. 

1983 Dec 17-29.  2.5 days/28.2F mean temp/CHM: 29 CLM: 19 
22nd-24th  26.55 score. 

2009 Dec 06-14. 4 days/30.0F mean temp/CHM: 34 CLM: 16
7th-12th   25.75 score.  

1978 Dec 25 - 1979 Jan 12. 3.5 days/29.4F mean temp/CHM: 35 CLM: 16
29th-1st   25.60 score. 

1924 Dec 15-28. 4 days/30.9F mean temp/CHM: 35 CLM: 12
16th-23rd  25.60 score. 

Langlois, OR(couple miles south of North Bend)
1899 Jan 31- Feb 08. 4 days/31.1F mean temp/CHM: 34 CLM: 13
2nd-7th    25.40 score.

1914 Dec 13-24. 5 days/32.8F mean temp/CHM: 36 CLM: 14
14th-24th  23.95 score.   

1923 Dec 30 - 1924 Jan 08. 3.5 day/30.9F mean temp/CHM: 33 CLM: 19
29th-2nd   23.85 score. 

1990 Dec 28 - 1991 Jan 06. 4.5 days/31.7F mean temp/CHM: 36 CLM: 17  
29th-6th   23.80 score.  

1974 Jan 01-12.  5 day/31.9F mean temp/CHM: 37 CLM: 18
2nd-11th   23.60 score. 

1956 Feb 14-17. 1 day/28.2F mean temp/CHM: 38 CLM: 18
16th       23.05 score. 

1918 Dec 31 - 1919 Jan 05. 6.5 day/34.3F mean temp/CHM: 37 CLM: 17
25th-9th   22.95 score. 

1909 Dec 31 - 1910 Jan 08. 2.5 days/30.1F mean temp/CHM: 40 CLM: 16
2nd-5th    22.65 score. 

1980 Jan 26 - Feb 01. 2.5 days/30.9F mean temp/CHM: 38 CLM: 16 
27th-30th  22.35 score.  

1890 Feb 23 - Mar 01. Estimated from Portland records & old 500 heights maps.

1943 Jan 15-27. 2 days/30.8F mean temp/CHM: 37 CLM: 16
17th-19th  22.20 score. Little Snow SW OR & Coast

1916 Jan 23 - Feb 09.  1.5 days/30.0F mean temp/CHM: 37 CLM: 18
28th-30th  22.00 score. SW OR & Coastal Snow. 

1909 Jan 04-15. 2 days/31.0F mean temp/CHM: 33 CLM: 20
8th-12th   22.00 score.

1902 Jan 23-31. 3.5 days/31.3F mean temp/CHM: 39 CLM: 20
25th-29th  21.70 score. 

1949 Jan 18 - Feb 07. 4.5 day/35.1F mean temp/CHM: 37 CLM: 13
19th-7th   21.15 score. 

1969 Jan 15-31. 3.5 days/32.3F mean temp/CHM: 34 CLM: 24 
23rd-29th  20.95 score. 

1909 Dec 22-25. 1.5 days/30.3F mean temp/CHM: 38 CLM: 20
22nd-23rd  20.95 score.

1955 Nov 11-18. 1.5 day/30.6F mean temp/CHM: 37 CLM: 21
14th-15th  20.65 score. 

1922 Jan 13-20. 2 days/32.7F mean temp/CHM: 37 CLM: 15
18th-21st  20.55 score. 

2007 Jan 10-17. 3 days/32.5F mean temp/CHM: 35 CLM: 22
12th-17th  20.50 score.  

1917 Jan 29 - Feb 02.  1.5 days/30.6F mean temp/CHM: 38 CLM: 21
31st-1st   20.40 score. 

1927 01 18-25.  1 day/30.2F mean temp/CHM: 43 CLM: 17
22nd       20.05 score.

1919 Nov 27-28. 1.5 day/31.2F mean temp/CHM: 39 CLM: 19
27th-28th  20.05 score. 

1903 Feb 02.    0.5 days/30.2F mean temp/CHM: 43 CLM: 17
2nd        19.55 score. Quite Cold in Eastern WA & Columbia Basin.

1906 Dec 30 - 1907 Jan 18. 2 days/31.6F mean temp/CHM: 37 CLM: 24

13th-15th  19.40 score. 
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Rest of mean temps above freezing

2017 Jan 02-17. 1.5 days/33.5F mean temp/CHM: 37 CLM: 21
3rd-7th    19.25 score.

1907 Jan 10-18. 2.5 days/32.6F mean temp/CHM: 37 CLM: 24
12th-15th  18.90 score. 

1911 Dec 29 - 1912 Jan 09. 1 day/32.2F mean temp/CHM: 36 CLM: 22
2nd-4th    18.55 score.  

1949 Dec 31 - 1950 Jan 20. 3 days/35.5F mean temp/CHM: 34 CLM: 19
2nd-15th   18.50 score. 

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Rest of cold episodes length less than 3 days

2008 Dec 14-25. 1 day/32.8F mean temp/CHM: 33 CLM: 23
15th-18th  18.45 score. 

1923 Jan 28 - Feb 03. 2 days/33.4F mean temp/CHM: 38 CLM: 21
28th-31st  18.10 score. South Valley Snowfall.

1941 Dec 26 - 1942 Jan 13. 2 days/34.2F mean temp/CHM: 37 CLM: 19
31st-5th   18.05 score.

1894 Jan 04-06. 1 day/32.3F mean temp/CHM: 38 CLM: 22
5th-6th    17.95 score. 

1911 Jan 09-15. 1.5 days/32.9F mean temp/CHM: 39 CLM: 21
12th-14th  17.85 score.

1896 Nov 25-Dec 02. 1.5 days/33.8F mean temp/CHM: 44 CLM: 20
27th-29th  16.95 score.

1945 Dec 12-21. 1.5 days/34.0F mean temp/CHM: 37 CLM: 23
13th-15th  16.75 score.

1935 Jan 12-21. 1 day/32.9F mean temp/CHM: 37 CLM: 26
18th-20th  16.60 score. SW OR Snow

1915 Dec 30 - 1916 Jan 20. 2 days/34.4F mean temp/CHM: 38 CLM: 23
14th-19th  16.60 score. 

1972 Jan 23 - Feb 05. 1 day/32.5F mean temp/CHM: 35 CLM: 29
26th       16.50 score. 

1909 Dec 03-07. 1 day/33.0F mean temp/CHM: 39 CLM: 24
3rd-4th    16.50 score.

1893 Jan 26 - Feb 08. 2.5 days/36.0F mean temp/CHM: 39 CLM: 18
1st-7th    16.50 score. 

1905 Jan 11-14  1 day/33.5F mean temp/CHM: 41 CLM: 22
11th-12th  16.00 score.

1908 Dec 16-22. 1.5 days/33.8F mean temp/CHM: 42 CLM: 22
18th-20th  15.95 score.

2005 Dec 14-18. 1.5 days/33.9F mean temp/CHM: 37 CLM: 27
15th-17th  15.85 score.

1946 Dec 28 - 1947 Jan 08. 2 days/34.7F mean temp/CHM: 41 CLM: 22
2nd-5th    15.80 score.

1900 Dec 31 - 1901 Jan 01. 1 day/33.3F mean temp/CHM: 42 CLM: 23
31st-1st   15.70 score.

1901 Jan 08-10. 0.5 days/33.7F mean temp/CHM: 35 CLM: 27
8th-10th   15.55 score. Coast & far south valley snow.

1929 Jan 19 - Feb 15. 0.5 days/33.0F mean temp/CHM: 45 CLM: 20
7th        15.50 score.

1926 Dec 12-15. 0.5 days/33.0F mean temp/CHM: 42 CLM: 23
14th       15.50 score.

1901 Dec 12-13. 1 day/33.5F mean temp/CHM: 43 CLM: 22
12th-13th  15.50 score.

1916 Dec 24-30. 1.5 days/34.3F mean temp/CHM: 39 CLM: 25
27th-30th  15.45 score.

1907 Jan 06-07. 1 day/33.6F mean temp/CHM: 40 CLM: 25
6th-7th    15.40 score.

1895 Jan 26.    0.5 days/33.0F mean temp/CHM: 40 CLM: 26
26th       15.25 score.

1933 Jan 16-21. 1 day/35.4F mean temp/CHM: 39 CLM: 21
17th-21st  14.85 score. SW OR Snow

1947 Jan 12-18. 2 days/34.8F mean temp/CHM: 43 CLM: 24
15th-18th  14.70 score.

1894 Feb 18-23. 0.5 days/33.5F mean temp/CHM: 43 CLM: 24
21st       14.50 score.

1932 Jan 12-17. 1 day/34.8F mean temp/CHM: 39 CLM: 25
12th-14th  14.45 score.

1898 Jan 24-25. 1 day/35.0F mean temp/CHM: 43 CLM: 23
24th-25th  13.75 score.

1894 Feb 10-11. 0.5 days/34.2F mean temp/CHM: 45 CLM: 23
10th       13.55 score.

1932 Jan 27 - Feb 04. 0.5 days/35.5F mean temp/CHM: 39 CLM: 26
31st-2nd   13.00 score. SW OR Snow.

1921 Dec 17-25. 0.5 days/35.5F mean temp/CHM: 38 CLM: 27
18th-22nd  13.00 score. SW OR snow.

1923 Feb 09-16. 0.5 days/34.7F mean temp/CHM: 42 CLM: 27
12th       12.80 score. SW OR Snowfall.

2016 Dec 13-19. 1 day/35.5F mean temp/CHM: 41 CLM: 27
18th-19th  12.75 score.

1939 Feb 07-11. 0 days/35.2F mean temp/CHM: 39 CLM: 28
7th-8th    12.30 score. SW OR and Coast Snow.

1896 Feb 29 - Mar 04. 0 days/35.2F mean temp/CHM: 42 CLM: 27
1st-4th    11.80 score. Coast and far south valley snow.

1900 Nov 19-22. 0 days/35.5F mean temp/CHM: 40 CLM: 28
19th-21st  11.75 score. South Coast snow.

1917 Feb 19 - Mar 01.  0 days/36.7F mean temp/CHM: 38 CLM: 27
20th-25th  11.70 score. SW OR & Coastal Snow.

1933 Feb 06-15. 1 day/37.5F mean temp/CHM: 42 CLM: 23
9th-13th   11.50 score.

1922 Dec 05-19. 0.5 days/35.5F mean temp/CHM: 45 CLM: 26 
14th       11.50 score.

1898 Dec 30-31. 0.5 days/35.5F mean temp/CHM: 45 CLM: 26
30th       11.50 score. Far south valley snow.

1913 Jan 16-19. 0 days/36.0F mean temp/CHM: 39 CLM: 29
16th-17th  11.25 score. SW Oregon Snow.

1906 Mar 12-16. 0 days/35.8F mean temp/CHM: 42 CLM: 27
13th-14th  11.20 score. South coast evening & overnight snow.

1931 Dec 11-16. 0.5 days/37.2F mean temp/CHM: 39 CLM: 29
11th-15th  10.55 score. SW OR Snow

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