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.

Southwest Climate Region

Precipitation Rankings, August 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
August 1999 1-Month	2.84" (72.14mm)	2.02" (51.31mm)	0.82" (20.83mm)	122nd Driest	Driest since: 1998	1962
August 1999 1-Month	2.84" (72.14mm)	2.02" (51.31mm)	0.82" (20.83mm)	7th Wettest	Wettest since: 1993	1963
Jul–Aug 1999 2-Month	5.61" (142.49mm)	3.89" (98.81mm)	1.72" (43.68mm)	127th Driest	Driest since: 1998	2020
Jul–Aug 1999 2-Month	5.61" (142.49mm)	3.89" (98.81mm)	1.72" (43.68mm)	2nd Wettest	Wettest since: 1921	1921
Jun–Aug 1999 3-Month	6.78" (172.21mm)	4.83" (122.68mm)	1.95" (49.53mm)	126th Driest	Driest since: 1998	2020
Jun–Aug 1999 3-Month	6.78" (172.21mm)	4.83" (122.68mm)	1.95" (49.53mm)	3rd Wettest	Wettest since: 1984	1921
May–Aug 1999 4-Month	8.18" (207.77mm)	5.94" (150.88mm)	2.24" (56.89mm)	125th Driest	Driest since: 1998	2020
May–Aug 1999 4-Month	8.18" (207.77mm)	5.94" (150.88mm)	2.24" (56.89mm)	4th Wettest	Wettest since: 1921	1921
Apr–Aug 1999 5-Month	10.56" (268.22mm)	7.00" (177.80mm)	3.56" (90.42mm)	128th Driest	Driest since: 1998	2020
Apr–Aug 1999 5-Month	10.56" (268.22mm)	7.00" (177.80mm)	3.56" (90.42mm)	1st Wettest	Wettest to Date	1999
Mar–Aug 1999 6-Month	11.12" (282.45mm)	8.15" (207.01mm)	2.97" (75.44mm)	127th Driest	Driest since: 1998	2002
Mar–Aug 1999 6-Month	11.12" (282.45mm)	8.15" (207.01mm)	2.97" (75.44mm)	2nd Wettest	Wettest since: 1941	1941
Feb–Aug 1999 7-Month	11.58" (294.13mm)	9.16" (232.66mm)	2.42" (61.47mm)	124th Driest	Driest since: 1998	2002
Feb–Aug 1999 7-Month	11.58" (294.13mm)	9.16" (232.66mm)	2.42" (61.47mm)	5th Wettest	Wettest since: 1957	1941
Jan–Aug 1999 8-Month	12.24" (310.90mm)	10.14" (257.56mm)	2.10" (53.34mm)	118th Driest	Driest since: 1998	2002
Jan–Aug 1999 8-Month	12.24" (310.90mm)	10.14" (257.56mm)	2.10" (53.34mm)	11th Wettest	Wettest since: 1993	1941
Dec 1998–Aug 1999 9-Month	12.73" (323.34mm)	11.15" (283.21mm)	1.58" (40.13mm)	107th Driest	Driest since: 1998	2002
Dec 1998–Aug 1999 9-Month	12.73" (323.34mm)	11.15" (283.21mm)	1.58" (40.13mm)	21st Wettest	Wettest since: 1995	1941
Nov 1998–Aug 1999 10-Month	13.72" (348.49mm)	12.04" (305.82mm)	1.68" (42.67mm)	107th Driest	Driest since: 1998	2002
Nov 1998–Aug 1999 10-Month	13.72" (348.49mm)	12.04" (305.82mm)	1.68" (42.67mm)	21st Wettest	Wettest since: 1995	1941
Oct 1998–Aug 1999 11-Month	16.03" (407.16mm)	13.17" (334.52mm)	2.86" (72.64mm)	115th Driest	Driest since: 1998	2002
Oct 1998–Aug 1999 11-Month	16.03" (407.16mm)	13.17" (334.52mm)	2.86" (72.64mm)	13th Wettest	Wettest since: 1995	1941
Sep 1998–Aug 1999 12-Month	17.21" (437.13mm)	14.54" (369.32mm)	2.67" (67.81mm)	110th Driest	Driest since: 1998	2002
Sep 1998–Aug 1999 12-Month	17.21" (437.13mm)	14.54" (369.32mm)	2.67" (67.81mm)	18th Wettest	Wettest since: 1995	1941
Mar 1998–Aug 1999 18-Month	25.79" (655.07mm)	22.69" (576.33mm)	3.10" (78.74mm)	109th Driest	Driest since: 1997	2002
Mar 1998–Aug 1999 18-Month	25.79" (655.07mm)	22.69" (576.33mm)	3.10" (78.74mm)	19th Wettest	Wettest since: 1998	1942
Sep 1997–Aug 1999 24-Month	34.24" (869.70mm)	29.09" (738.89mm)	5.15" (130.81mm)	116th Driest	Driest since: 1998	2003
Sep 1997–Aug 1999 24-Month	34.24" (869.70mm)	29.09" (738.89mm)	5.15" (130.81mm)	11th Wettest	Wettest since: 1993	1942
Sep 1996–Aug 1999 36-Month	50.84" (1,291.34mm)	43.58" (1,106.93mm)	7.26" (184.41mm)	117th Driest	Driest since: 1998	1956
Sep 1996–Aug 1999 36-Month	50.84" (1,291.34mm)	43.58" (1,106.93mm)	7.26" (184.41mm)	9th Wettest	Wettest since: 1987	1907
Sep 1995–Aug 1999 48-Month	62.88" (1,597.15mm)	58.05" (1,474.47mm)	4.83" (122.68mm)	104th Driest	Driest since: 1997	1956
Sep 1995–Aug 1999 48-Month	62.88" (1,597.15mm)	58.05" (1,474.47mm)	4.83" (122.68mm)	21st Wettest	Wettest since: 1998	1986
Sep 1994–Aug 1999 60-Month	80.39" (2,041.91mm)	72.53" (1,842.26mm)	7.86" (199.65mm)	114th Driest	Driest since: 1998	2004
Sep 1994–Aug 1999 60-Month	80.39" (2,041.91mm)	72.53" (1,842.26mm)	7.86" (199.65mm)	10th Wettest	Wettest since: 1995	1987

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Regional Rankings, published January 2023, retrieved on February 7, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/regional/rankings