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, May 1997

View Period (Months):
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Wettest/Driest
Since
Record
May 1997
1-Month
1.96"
(49.78mm)
2.14"
(54.36mm)
-0.18"
(-4.58mm)
57th Driest
Driest since:
1924
72nd Wettest
Wettest since:
1998
Ties: 1983
Apr–May 1997
2-Month
5.25"
(133.35mm)
4.50"
(114.30mm)
0.75"
(19.05mm)
91st Driest
Driest since:
1924
38th Wettest
Wettest since:
1996
Ties: 2018
Mar–May 1997
3-Month
9.97"
(253.24mm)
7.76"
(197.10mm)
2.21"
(56.14mm)
109th Driest
Driest since:
1924
20th Wettest
Wettest since:
2011
Feb–May 1997
4-Month
12.40"
(314.96mm)
11.37"
(288.80mm)
1.03"
(26.16mm)
86th Driest
Driest since:
1924
43rd Wettest
Wettest since:
1904
Jan–May 1997
5-Month
18.29"
(464.57mm)
15.90"
(403.86mm)
2.39"
(60.71mm)
102nd Driest
Driest since:
1924
27th Wettest
Wettest since:
1904
Ties: 1907
Dec 1996–May 1997
6-Month
28.56"
(725.42mm)
20.54"
(521.72mm)
8.02"
(203.70mm)
127th Driest
Driest since:
1977
1st Wettest
Wettest to Date
1997
Nov 1996–May 1997
7-Month
34.35"
(872.49mm)
24.89"
(632.21mm)
9.46"
(240.28mm)
125th Driest
Driest since:
1977
3rd Wettest
Wettest since:
1974
Oct 1996–May 1997
8-Month
38.01"
(965.45mm)
27.45"
(697.23mm)
10.56"
(268.22mm)
126th Driest
Driest since:
1977
2nd Wettest
Wettest since:
1974
Sep 1996–May 1997
9-Month
39.43"
(1,001.52mm)
28.87"
(733.30mm)
10.56"
(268.22mm)
126th Driest
Driest since:
1977
2nd Wettest
Wettest since:
1974
Aug 1996–May 1997
10-Month
39.83"
(1,011.68mm)
29.68"
(753.87mm)
10.15"
(257.81mm)
126th Driest
Driest since:
1977
2nd Wettest
Wettest since:
1974
Ties: 1996
Jul 1996–May 1997
11-Month
40.34"
(1,024.64mm)
30.40"
(772.16mm)
9.94"
(252.48mm)
125th Driest
Driest since:
1977
3rd Wettest
Wettest since:
1974
Jun 1996–May 1997
12-Month
41.32"
(1,049.53mm)
32.13"
(816.10mm)
9.19"
(233.43mm)
125th Driest
Driest since:
1977
3rd Wettest
Wettest since:
1996
Dec 1995–May 1997
18-Month
69.33"
(1,760.98mm)
52.65"
(1,337.31mm)
16.68"
(423.67mm)
126th Driest
Driest since:
1930
1st Wettest
Wettest to Date
1997
Jun 1995–May 1997
24-Month
85.03"
(2,159.76mm)
64.28"
(1,632.71mm)
20.75"
(527.05mm)
126th Driest
Driest since:
1930
1st Wettest
Wettest to Date
1997
Jun 1994–May 1997
36-Month
120.34"
(3,056.64mm)
96.36"
(2,447.54mm)
23.98"
(609.10mm)
124th Driest
Driest since:
1931
2nd Wettest
Wettest to Date
1998
Jun 1993–May 1997
48-Month
146.18"
(3,712.97mm)
128.40"
(3,261.36mm)
17.78"
(451.61mm)
119th Driest
Driest since:
1931
6th Wettest
Wettest since:
1999
Jun 1992–May 1997
60-Month
179.11"
(4,549.39mm)
160.37"
(4,073.40mm)
18.74"
(475.99mm)
117th Driest
Driest since:
1933
7th Wettest
Wettest since:
1999

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