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 1999

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

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Regional Rankings, published January 2023, retrieved on January 30, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/regional/rankings