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Divisional Rankings

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Please note, Degree Days and Palmer Indices are not available for Alaska or Hawaii. Palmer Drought Severity Index (PDSI), Palmer Hydrological Drought Index (PHDI), and Palmer Modified Drought Index (PMDI) are not offered for multiple-month time scales.

Louisiana, Climate Division 9

December 1998 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
December 1998 1-Month	-2.07	-0.10	-1.97	14th Driest	Driest since: 1984	2021
December 1998 1-Month	-2.07	-0.10	-1.97	117th Wettest	Wettest since: 1997	2009
Nov–Dec 1998 2-Month	-1.09	-0.07	-1.02	36th Driest	Driest since: 1988	1906
	-1.09	-0.07	-1.02	95th Wettest	Wettest since: 1997	1947
	Ties: 1936
Oct–Dec 1998 3-Month	-1.04	0.01	-1.05	28th Driest	Driest since: 1987	2011
Oct–Dec 1998 3-Month	-1.04	0.01	-1.05	103rd Wettest	Wettest since: 1997	2009
Sep–Dec 1998 4-Month	1.04	-0.04	1.08	111th Driest	Driest since: 1997	1924
	1.04	-0.04	1.08	20th Wettest	Wettest since: 1992	2002
	Ties: 1976
Aug–Dec 1998 5-Month	0.47	-0.05	0.52	93rd Driest	Driest since: 1997	1924
Aug–Dec 1998 5-Month	0.47	-0.05	0.52	38th Wettest	Wettest since: 1992	1977
Jul–Dec 1998 6-Month	-0.07	-0.04	-0.03	58th Driest	Driest since: 1997	1924
Jul–Dec 1998 6-Month	-0.07	-0.04	-0.03	73rd Wettest	Wettest since: 1994	1898
Jun–Dec 1998 7-Month	-0.41	-0.04	-0.37	41st Driest	Driest since: 1995	1924
Jun–Dec 1998 7-Month	-0.41	-0.04	-0.37	90th Wettest	Wettest since: 1997	1898
May–Dec 1998 8-Month	-0.77	-0.04	-0.73	26th Driest	Driest since: 1990	1924
May–Dec 1998 8-Month	-0.77	-0.04	-0.73	105th Wettest	Wettest since: 1997	1942, 1975
Apr–Dec 1998 9-Month	-0.69	-0.04	-0.65	28th Driest	Driest since: 1990	1924
Apr–Dec 1998 9-Month	-0.69	-0.04	-0.65	103rd Wettest	Wettest since: 1997	2021
Mar–Dec 1998 10-Month	-0.46	-0.05	-0.41	35th Driest	Driest since: 1990	1924
Mar–Dec 1998 10-Month	-0.46	-0.05	-0.41	96th Wettest	Wettest since: 1997	2021
Feb–Dec 1998 11-Month	-0.40	-0.07	-0.33	39th Driest	Driest since: 1996	2023
Feb–Dec 1998 11-Month	-0.40	-0.07	-0.33	92nd Wettest	Wettest since: 1997	2021
Jan–Dec 1998 12-Month	0.39	-0.05	0.44	97th Driest	Driest since: 1997	2023
Jan–Dec 1998 12-Month	0.39	-0.05	0.44	34th Wettest	Wettest since: 1992	1991
Jul 1997–Dec 1998 18-Month	0.12	-0.04	0.16	84th Driest	Driest since: 1997	1904
	0.12	-0.04	0.16	46th Wettest	Wettest since: 1993	1946
	Ties: 1972
Jan 1997–Dec 1998 24-Month	0.28	-0.04	0.32	97th Driest	Driest since: 1997	2000
	0.28	-0.04	0.32	33rd Wettest	Wettest since: 1993	1992
	Ties: 1901, 1949, 1961
Jan 1996–Dec 1998 36-Month	0.02	-0.04	0.06	76th Driest	Driest since: 1997	1904
	0.02	-0.04	0.06	53rd Wettest	Wettest since: 1995	1993
	Ties: 1981, 1983
Jan 1995–Dec 1998 48-Month	-0.01	-0.03	0.02	71st Driest	Driest since: 1997	1904
	-0.01	-0.03	0.02	57th Wettest	Wettest since: 1995	1994
	Ties: 1934, 1973
Jan 1994–Dec 1998 60-Month	-0.02	-0.03	0.01	75th Driest	Driest since: 1997	1906
	-0.02	-0.03	0.01	52nd Wettest	Wettest since: 1996	1995
	Ties: 1915, 1920, 1986

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Divisional Rankings, published March 2025, retrieved on March 22, 2025 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/rankings

Climate at a Glance Divisional Rankings

Divisional Rankings

Louisiana, Climate Division 9

December 1998 Palmer Z-Index Rankings

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