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 1978

View Period (Months):
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Wettest/Driest
Since
Record
April 1978
1-Month
3.01"
(76.45mm)
1.33"
(33.78mm)
1.68"
(42.67mm)
121st Driest
Driest since:
1909
8th Wettest
Wettest since:
1935
Mar–Apr 1978
2-Month
7.43"
(188.72mm)
3.67"
(93.22mm)
3.76"
(95.50mm)
126th Driest
Driest since:
2008
3rd Wettest
Wettest to Date
1983
Feb–Apr 1978
3-Month
11.62"
(295.15mm)
6.39"
(162.31mm)
5.23"
(132.84mm)
123rd Driest
Driest since:
1997
6th Wettest
Wettest since:
1983
Jan–Apr 1978
4-Month
17.00"
(431.80mm)
9.37"
(238.00mm)
7.63"
(193.80mm)
125th Driest
Driest since:
2022
4th Wettest
Wettest to Date
1995
Dec 1977–Apr 1978
5-Month
21.16"
(537.46mm)
11.92"
(302.77mm)
9.24"
(234.69mm)
127th Driest
Driest since:
1977
1st Wettest
Wettest to Date
1978
Nov 1977–Apr 1978
6-Month
22.71"
(576.83mm)
13.79"
(350.27mm)
8.92"
(226.56mm)
125th Driest
Driest since:
1977
3rd Wettest
Wettest to Date
1983
Oct 1977–Apr 1978
7-Month
23.05"
(585.47mm)
14.82"
(376.43mm)
8.23"
(209.04mm)
124th Driest
Driest since:
1977
4th Wettest
Wettest to Date
1983
Sep 1977–Apr 1978
8-Month
23.72"
(602.49mm)
15.31"
(388.87mm)
8.41"
(213.62mm)
122nd Driest
Driest since:
1977
6th Wettest
Wettest since:
1983
Aug 1977–Apr 1978
9-Month
24.75"
(628.65mm)
15.70"
(398.78mm)
9.05"
(229.87mm)
126th Driest
Driest since:
1977
2nd Wettest
Wettest to Date
1983
Jul 1977–Apr 1978
10-Month
24.98"
(634.49mm)
16.03"
(407.16mm)
8.95"
(227.33mm)
126th Driest
Driest since:
2021
2nd Wettest
Wettest to Date
1983
Jun 1977–Apr 1978
11-Month
25.67"
(652.02mm)
16.52"
(419.61mm)
9.15"
(232.41mm)
125th Driest
Driest since:
2021
3rd Wettest
Wettest to Date
1983
May 1977–Apr 1978
12-Month
27.72"
(704.09mm)
17.44"
(442.98mm)
10.28"
(261.11mm)
126th Driest
Driest since:
1977
2nd Wettest
Wettest to Date
1983
Nov 1976–Apr 1978
18-Month
32.30"
(820.42mm)
31.22"
(792.99mm)
1.08"
(27.43mm)
80th Driest
Driest since:
1977
47th Wettest
Wettest since:
1983
Ties: 1944
May 1976–Apr 1978
24-Month
36.67"
(931.42mm)
34.90"
(886.46mm)
1.77"
(44.96mm)
83rd Driest
Driest since:
1977
44th Wettest
Wettest since:
1983
May 1975–Apr 1978
36-Month
48.36"
(1,228.34mm)
52.30"
(1,328.42mm)
-3.94"
(-100.08mm)
44th Driest
Driest since:
2022
82nd Wettest
Wettest since:
1984
May 1974–Apr 1978
48-Month
65.09"
(1,653.29mm)
69.56"
(1,766.82mm)
-4.47"
(-113.53mm)
46th Driest
Driest since:
2015
79th Wettest
Wettest since:
1998
May 1973–Apr 1978
60-Month
85.25"
(2,165.35mm)
86.83"
(2,205.48mm)
-1.58"
(-40.13mm)
65th Driest
Driest since:
1933
59th Wettest
Wettest since:
1999

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