Standardized Precipitation Index Table

Northwest Climate Division

Arkansas, Climate Division 01

Precipitation Data Table

Time Scale in Months (As of the end of Mar. 2024)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 4.16 5.74 9.88 12.26 14.13 18.08 22.7 26.96 31.62 34.59 38.84 40.63 56.35 68.73 93.84 115.76 143.28 190.98 262.16 311.2
Accumulated Precipitation Departure from Normal (in.) 0.07 -1.05 0.3 -0.46 -2.26 -2.09 -1.54 -1.01 -0.09 -1.74 -3.08 -6.01 0.13 1.91 0.51 2.29 3.29 4.34 28.93 31.51
Accumulated Precipitation Percent of Average 102 85 103 96 86 90 94 96 100 95 93 87 100 103 101 102 102 102 112 111
Accumulated Precipitation Percentile (non-exceedance) 58.5 40.6 58.3 49.1 33.5 36.6 42.2 46.3 52.1 41.9 35.4 22.8 52.7 59.5 53.4 58.3 60.2 61.2 92.9 93.3
Standardized Precipitation Index 0.21 -0.24 0.21 -0.02 -0.43 -0.34 -0.2 -0.09 0.05 -0.2 -0.37 -0.75 0.07 0.24 0.09 0.21 0.26 0.28 1.47 1.5