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.

West Climate Region

Precipitation Rankings, April 1999

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
April 1999
1-Month
1.77"
(44.96mm)
1.33"
(33.78mm)
0.44"
(11.18mm)
102nd Driest
Driest since:
1909
27th Wettest
Wettest since:
1935
Ties: 1998
Mar–Apr 1999
2-Month
3.34"
(84.84mm)
3.67"
(93.22mm)
-0.33"
(-8.38mm)
69th Driest
Driest since:
2008
60th Wettest
Wettest since:
1983
Feb–Apr 1999
3-Month
6.58"
(167.13mm)
6.39"
(162.31mm)
0.19"
(4.82mm)
75th Driest
Driest since:
1997
54th Wettest
Wettest since:
1983
Ties: 1926
Jan–Apr 1999
4-Month
9.19"
(233.43mm)
9.37"
(238.00mm)
-0.18"
(-4.57mm)
73rd Driest
Driest since:
2022
56th Wettest
Wettest since:
1995
Dec 1998–Apr 1999
5-Month
10.33"
(262.38mm)
11.92"
(302.77mm)
-1.59"
(-40.39mm)
59th Driest
Driest since:
1977
69th Wettest
Wettest since:
1978
Nov 1998–Apr 1999
6-Month
13.24"
(336.30mm)
13.79"
(350.27mm)
-0.55"
(-13.97mm)
67th Driest
Driest since:
1977
61st Wettest
Wettest since:
1983
Ties: 1954
Oct 1998–Apr 1999
7-Month
14.15"
(359.41mm)
14.82"
(376.43mm)
-0.67"
(-17.02mm)
64th Driest
Driest since:
1977
64th Wettest
Wettest since:
1983
Sep 1998–Apr 1999
8-Month
15.36"
(390.14mm)
15.31"
(388.87mm)
0.05"
(1.27mm)
71st Driest
Driest since:
1977
57th Wettest
Wettest since:
1983
Aug 1998–Apr 1999
9-Month
15.55"
(394.97mm)
15.70"
(398.78mm)
-0.15"
(-3.81mm)
69th Driest
Driest since:
1977
59th Wettest
Wettest since:
1983
Jul 1998–Apr 1999
10-Month
16.03"
(407.16mm)
16.03"
(407.16mm)
0.00"
(0.00mm)
71st Driest
Driest since:
2021
57th Wettest
Wettest since:
1983
Jun 1998–Apr 1999
11-Month
17.21"
(437.13mm)
16.52"
(419.61mm)
0.69"
(17.52mm)
80th Driest
Driest since:
2021
48th Wettest
Wettest since:
1983
May 1998–Apr 1999
12-Month
20.03"
(508.76mm)
17.44"
(442.98mm)
2.59"
(65.78mm)
97th Driest
Driest since:
1977
31st Wettest
Wettest since:
1983
Nov 1997–Apr 1999
18-Month
42.20"
(1,071.88mm)
31.22"
(792.99mm)
10.98"
(278.89mm)
120th Driest
Driest since:
1977
7th Wettest
Wettest since:
1983
May 1997–Apr 1999
24-Month
46.36"
(1,177.54mm)
34.90"
(886.46mm)
11.46"
(291.08mm)
123rd Driest
Driest since:
1977
4th Wettest
Wettest since:
1983
May 1996–Apr 1999
36-Month
66.62"
(1,692.15mm)
52.30"
(1,328.42mm)
14.32"
(363.73mm)
123rd Driest
Driest since:
2022
3rd Wettest
Wettest since:
1984
May 1995–Apr 1999
48-Month
86.22"
(2,189.99mm)
69.56"
(1,766.82mm)
16.66"
(423.17mm)
118th Driest
Driest since:
2015
7th Wettest
Wettest since:
1998
May 1994–Apr 1999
60-Month
112.08"
(2,846.83mm)
86.83"
(2,205.48mm)
25.25"
(641.35mm)
123rd Driest
Driest since:
1933
1st Wettest
Wettest to Date
1999

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