Regional Rankings

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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 2004

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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 2004 1-Month	0.83" (21.08mm)	1.33" (33.78mm)	-0.50" (-12.70mm)	37th Driest	Driest since: 1992	1909
April 2004 1-Month	0.83" (21.08mm)	1.33" (33.78mm)	-0.50" (-12.70mm)	92nd Wettest	Wettest since: 2003	1935
Mar–Apr 2004 2-Month	1.61" (40.89mm)	3.67" (93.22mm)	-2.06" (-52.33mm)	11th Driest	Driest since: 1997	2008
Mar–Apr 2004 2-Month	1.61" (40.89mm)	3.67" (93.22mm)	-2.06" (-52.33mm)	118th Wettest	Wettest since: 2003	1983
Feb–Apr 2004 3-Month	5.74" (145.80mm)	6.39" (162.31mm)	-0.65" (-16.51mm)	58th Driest	Driest since: 2002	1997
	5.74" (145.80mm)	6.39" (162.31mm)	-0.65" (-16.51mm)	71st Wettest	Wettest since: 2003	1983
	Ties: 2016
Jan–Apr 2004 4-Month	7.29" (185.17mm)	9.37" (238.00mm)	-2.08" (-52.83mm)	44th Driest	Driest since: 2002	2022
Jan–Apr 2004 4-Month	7.29" (185.17mm)	9.37" (238.00mm)	-2.08" (-52.83mm)	85th Wettest	Wettest since: 2003	1995
Dec 2003–Apr 2004 5-Month	11.39" (289.31mm)	11.92" (302.77mm)	-0.53" (-13.46mm)	71st Driest	Driest since: 2002	1977
Dec 2003–Apr 2004 5-Month	11.39" (289.31mm)	11.92" (302.77mm)	-0.53" (-13.46mm)	57th Wettest	Wettest since: 2003	1978
Nov 2003–Apr 2004 6-Month	13.18" (334.77mm)	13.79" (350.27mm)	-0.61" (-15.50mm)	63rd Driest	Driest since: 2002	1977
	13.18" (334.77mm)	13.79" (350.27mm)	-0.61" (-15.50mm)	65th Wettest	Wettest since: 2003	1983
	Ties: 1905
Oct 2003–Apr 2004 7-Month	13.28" (337.31mm)	14.82" (376.43mm)	-1.54" (-39.12mm)	58th Driest	Driest since: 2002	1977
Oct 2003–Apr 2004 7-Month	13.28" (337.31mm)	14.82" (376.43mm)	-1.54" (-39.12mm)	70th Wettest	Wettest since: 2003	1983
Sep 2003–Apr 2004 8-Month	13.51" (343.15mm)	15.31" (388.87mm)	-1.80" (-45.72mm)	57th Driest	Driest since: 2002	1977
Sep 2003–Apr 2004 8-Month	13.51" (343.15mm)	15.31" (388.87mm)	-1.80" (-45.72mm)	71st Wettest	Wettest since: 2003	1983
Aug 2003–Apr 2004 9-Month	14.32" (363.73mm)	15.70" (398.78mm)	-1.38" (-35.05mm)	58th Driest	Driest since: 2002	1977
Aug 2003–Apr 2004 9-Month	14.32" (363.73mm)	15.70" (398.78mm)	-1.38" (-35.05mm)	70th Wettest	Wettest since: 2003	1983
Jul 2003–Apr 2004 10-Month	14.66" (372.36mm)	16.03" (407.16mm)	-1.37" (-34.80mm)	58th Driest	Driest since: 2002	2021
Jul 2003–Apr 2004 10-Month	14.66" (372.36mm)	16.03" (407.16mm)	-1.37" (-34.80mm)	70th Wettest	Wettest since: 2003	1983
Jun 2003–Apr 2004 11-Month	14.72" (373.89mm)	16.52" (419.61mm)	-1.80" (-45.72mm)	53rd Driest	Driest since: 2002	2021
Jun 2003–Apr 2004 11-Month	14.72" (373.89mm)	16.52" (419.61mm)	-1.80" (-45.72mm)	75th Wettest	Wettest since: 2003	1983
May 2003–Apr 2004 12-Month	15.73" (399.54mm)	17.44" (442.98mm)	-1.71" (-43.44mm)	57th Driest	Driest since: 2002	1977
May 2003–Apr 2004 12-Month	15.73" (399.54mm)	17.44" (442.98mm)	-1.71" (-43.44mm)	71st Wettest	Wettest since: 2003	1983
Nov 2002–Apr 2004 18-Month	31.44" (798.58mm)	31.22" (792.99mm)	0.22" (5.59mm)	69th Driest	Driest since: 2003	1977
Nov 2002–Apr 2004 18-Month	31.44" (798.58mm)	31.22" (792.99mm)	0.22" (5.59mm)	58th Wettest	Wettest since: 1999	1983
May 2002–Apr 2004 24-Month	32.72" (831.09mm)	34.90" (886.46mm)	-2.18" (-55.37mm)	51st Driest	Driest since: 2003	1977
May 2002–Apr 2004 24-Month	32.72" (831.09mm)	34.90" (886.46mm)	-2.18" (-55.37mm)	76th Wettest	Wettest since: 2000	1983
May 2001–Apr 2004 36-Month	46.00" (1,168.40mm)	52.30" (1,328.42mm)	-6.30" (-160.02mm)	34th Driest	Driest since: 2003	2022
May 2001–Apr 2004 36-Month	46.00" (1,168.40mm)	52.30" (1,328.42mm)	-6.30" (-160.02mm)	92nd Wettest	Wettest since: 2001	1984
May 2000–Apr 2004 48-Month	60.26" (1,530.60mm)	69.56" (1,766.82mm)	-9.30" (-236.22mm)	21st Driest	Driest since: 1992	2015
May 2000–Apr 2004 48-Month	60.26" (1,530.60mm)	69.56" (1,766.82mm)	-9.30" (-236.22mm)	104th Wettest	Wettest since: 2003	1998
May 1999–Apr 2004 60-Month	76.08" (1,932.43mm)	86.83" (2,205.48mm)	-10.75" (-273.05mm)	16th Driest	Driest since: 1992	1933
May 1999–Apr 2004 60-Month	76.08" (1,932.43mm)	86.83" (2,205.48mm)	-10.75" (-273.05mm)	108th Wettest	Wettest since: 2003	1999

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Regional Rankings, published November 2022, retrieved on December 6, 2022 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/regional/rankings