Regional Rankings

Regional Data Info
Please note, Palmer Indices are not available for NWS Regions. Palmer Drought Severity Index (PDSI), Palmer Hydrological Drought Index (PHDI), and Palmer Modified Drought Index (PMDI) are not offered for multiple-month time scales.

Northwest Climate Region

Precipitation Rankings, October 1947

View Period (Months):
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  • Record Driest
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Wettest/Driest
Since
Record
October 1947
1-Month
5.79"
(147.07mm)
2.54"
(64.52mm)
3.25"
(82.55mm)
126th Driest
Driest since:
1895
3rd Wettest
Wettest to Date
2016
Sep–Oct 1947
2-Month
7.29"
(185.17mm)
3.96"
(100.58mm)
3.33"
(84.59mm)
127th Driest
Driest since:
1987
2nd Wettest
Wettest to Date
2016
Aug–Oct 1947
3-Month
7.86"
(199.64mm)
4.76"
(120.90mm)
3.10"
(78.74mm)
125th Driest
Driest since:
1987
4th Wettest
Wettest since:
2016
Jul–Oct 1947
4-Month
8.69"
(220.73mm)
5.49"
(139.45mm)
3.20"
(81.28mm)
125th Driest
Driest since:
1952
4th Wettest
Wettest since:
2016
Jun–Oct 1947
5-Month
12.01"
(305.05mm)
7.21"
(183.13mm)
4.80"
(121.92mm)
128th Driest
Driest since:
1917, 2002
1st Wettest
Wettest to Date
1947
May–Oct 1947
6-Month
13.20"
(335.28mm)
9.35"
(237.49mm)
3.85"
(97.79mm)
127th Driest
Driest since:
2002
2nd Wettest
Wettest since:
1941
Apr–Oct 1947
7-Month
15.26"
(387.60mm)
11.71"
(297.43mm)
3.55"
(90.17mm)
122nd Driest
Driest since:
2002
7th Wettest
Wettest since:
1997
Mar–Oct 1947
8-Month
18.22"
(462.79mm)
14.97"
(380.24mm)
3.25"
(82.55mm)
114th Driest
Driest since:
1939
15th Wettest
Wettest since:
1997
Feb–Oct 1947
9-Month
20.60"
(523.24mm)
18.58"
(471.93mm)
2.02"
(51.31mm)
98th Driest
Driest since:
1929
31st Wettest
Wettest since:
2017
Jan–Oct 1947
10-Month
24.05"
(610.87mm)
23.10"
(586.74mm)
0.95"
(24.13mm)
81st Driest
Driest since:
1929
48th Wettest
Wettest since:
1950
Dec 1946–Oct 1947
11-Month
28.22"
(716.79mm)
27.75"
(704.85mm)
0.47"
(11.94mm)
69th Driest
Driest since:
1929
59th Wettest
Wettest since:
1997
Nov 1946–Oct 1947
12-Month
33.74"
(857.00mm)
32.10"
(815.34mm)
1.64"
(41.66mm)
85th Driest
Driest since:
1977
43rd Wettest
Wettest since:
1997
May 1946–Oct 1947
18-Month
43.72"
(1,110.49mm)
41.48"
(1,053.59mm)
2.24"
(56.90mm)
91st Driest
Driest since:
1929
37th Wettest
Wettest since:
1997
Ties: 1976
Nov 1945–Oct 1947
24-Month
69.01"
(1,752.85mm)
64.23"
(1,631.44mm)
4.78"
(121.41mm)
106th Driest
Driest since:
1930
21st Wettest
Wettest since:
1997
Nov 1944–Oct 1947
36-Month
100.01"
(2,540.25mm)
96.31"
(2,446.27mm)
3.70"
(93.98mm)
93rd Driest
Driest since:
1931
33rd Wettest
Wettest since:
1997
Nov 1943–Oct 1947
48-Month
122.55"
(3,112.77mm)
128.38"
(3,260.85mm)
-5.83"
(-148.08mm)
34th Driest
Driest since:
1931
91st Wettest
Wettest since:
1999
Nov 1942–Oct 1947
60-Month
160.22"
(4,069.59mm)
160.37"
(4,073.40mm)
-0.15"
(-3.81mm)
61st Driest
Driest since:
1932
63rd Wettest
Wettest since:
1999

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