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.

Northwest Climate Region

Precipitation Rankings, October 1987

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Wettest/Driest Since	Record
October 1987 1-Month	0.17" (4.32mm)	2.54" (64.52mm)	-2.37" (-60.20mm)	2nd Driest	Driest since: 1895	1895
October 1987 1-Month	0.17" (4.32mm)	2.54" (64.52mm)	-2.37" (-60.20mm)	127th Wettest	Wettest since: 1986	2016
Sep–Oct 1987 2-Month	0.41" (10.41mm)	3.96" (100.58mm)	-3.55" (-90.17mm)	1st Driest	Driest since: 1987	1987
Sep–Oct 1987 2-Month	0.41" (10.41mm)	3.96" (100.58mm)	-3.55" (-90.17mm)	128th Wettest	Wettest since: 1986	2016
Aug–Oct 1987 3-Month	0.85" (21.59mm)	4.76" (120.90mm)	-3.91" (-99.31mm)	1st Driest	Driest since: 1987	1987
Aug–Oct 1987 3-Month	0.85" (21.59mm)	4.76" (120.90mm)	-3.91" (-99.31mm)	128th Wettest	Wettest since: 1986	2016
Jul–Oct 1987 4-Month	2.63" (66.80mm)	5.49" (139.45mm)	-2.86" (-72.65mm)	5th Driest	Driest since: 1952	1952
Jul–Oct 1987 4-Month	2.63" (66.80mm)	5.49" (139.45mm)	-2.86" (-72.65mm)	124th Wettest	Wettest since: 1986	2016
Jun–Oct 1987 5-Month	3.73" (94.74mm)	7.21" (183.13mm)	-3.48" (-88.39mm)	3rd Driest	Driest since: 1917	1917, 2002
Jun–Oct 1987 5-Month	3.73" (94.74mm)	7.21" (183.13mm)	-3.48" (-88.39mm)	126th Wettest	Wettest since: 1986	1947
May–Oct 1987 6-Month	6.15" (156.21mm)	9.35" (237.49mm)	-3.20" (-81.28mm)	8th Driest	Driest since: 1974	2002
May–Oct 1987 6-Month	6.15" (156.21mm)	9.35" (237.49mm)	-3.20" (-81.28mm)	121st Wettest	Wettest since: 1986	1941
Apr–Oct 1987 7-Month	7.68" (195.07mm)	11.71" (297.43mm)	-4.03" (-102.36mm)	3rd Driest	Driest since: 1952	2002
Apr–Oct 1987 7-Month	7.68" (195.07mm)	11.71" (297.43mm)	-4.03" (-102.36mm)	126th Wettest	Wettest since: 1986	1997
Mar–Oct 1987 8-Month	11.38" (289.05mm)	14.97" (380.24mm)	-3.59" (-91.19mm)	9th Driest	Driest since: 1952	1939
Mar–Oct 1987 8-Month	11.38" (289.05mm)	14.97" (380.24mm)	-3.59" (-91.19mm)	120th Wettest	Wettest since: 1986	1997
Feb–Oct 1987 9-Month	14.06" (357.12mm)	18.58" (471.93mm)	-4.52" (-114.81mm)	8th Driest	Driest since: 1973	1929
	14.06" (357.12mm)	18.58" (471.93mm)	-4.52" (-114.81mm)	121st Wettest	Wettest since: 1986	2017
	Ties: 1924, 1966
Jan–Oct 1987 10-Month	18.03" (457.96mm)	23.10" (586.74mm)	-5.07" (-128.78mm)	7th Driest	Driest since: 1973	1929
Jan–Oct 1987 10-Month	18.03" (457.96mm)	23.10" (586.74mm)	-5.07" (-128.78mm)	122nd Wettest	Wettest since: 1986	1950
Dec 1986–Oct 1987 11-Month	20.08" (510.03mm)	27.75" (704.85mm)	-7.67" (-194.82mm)	3rd Driest	Driest since: 1929	1929
Dec 1986–Oct 1987 11-Month	20.08" (510.03mm)	27.75" (704.85mm)	-7.67" (-194.82mm)	125th Wettest	Wettest since: 1986	1997
Nov 1986–Oct 1987 12-Month	24.93" (633.22mm)	32.10" (815.34mm)	-7.17" (-182.12mm)	9th Driest	Driest since: 1977	1977
Nov 1986–Oct 1987 12-Month	24.93" (633.22mm)	32.10" (815.34mm)	-7.17" (-182.12mm)	119th Wettest	Wettest since: 1986	1997
May 1986–Oct 1987 18-Month	34.09" (865.89mm)	41.48" (1,053.59mm)	-7.39" (-187.70mm)	10th Driest	Driest since: 1977	1929
May 1986–Oct 1987 18-Month	34.09" (865.89mm)	41.48" (1,053.59mm)	-7.39" (-187.70mm)	118th Wettest	Wettest since: 1986	1997
Nov 1985–Oct 1987 24-Month	56.28" (1,429.51mm)	64.23" (1,631.44mm)	-7.95" (-201.93mm)	12th Driest	Driest since: 1977	1930
Nov 1985–Oct 1987 24-Month	56.28" (1,429.51mm)	64.23" (1,631.44mm)	-7.95" (-201.93mm)	115th Wettest	Wettest since: 1986	1997
Nov 1984–Oct 1987 36-Month	85.42" (2,169.67mm)	96.31" (2,446.27mm)	-10.89" (-276.60mm)	11th Driest	Driest since: 1979	1931
Nov 1984–Oct 1987 36-Month	85.42" (2,169.67mm)	96.31" (2,446.27mm)	-10.89" (-276.60mm)	115th Wettest	Wettest since: 1986	1997
Nov 1983–Oct 1987 48-Month	124.80" (3,169.92mm)	128.38" (3,260.85mm)	-3.58" (-90.93mm)	44th Driest	Driest since: 1980	1931
	124.80" (3,169.92mm)	128.38" (3,260.85mm)	-3.58" (-90.93mm)	81st Wettest	Wettest since: 1986	1999
	Ties: 1928
Nov 1982–Oct 1987 60-Month	163.33" (4,148.58mm)	160.37" (4,073.40mm)	2.96" (75.18mm)	76th Driest	Driest since: 1981	1932
Nov 1982–Oct 1987 60-Month	163.33" (4,148.58mm)	160.37" (4,073.40mm)	2.96" (75.18mm)	48th Wettest	Wettest since: 1986	1999

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Regional Rankings, published January 2023, retrieved on January 26, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/regional/rankings