COULEE DAM 1 SW, WA

Total of Precipitation (Inches)

(451767)

File last updated on April 26, 2024
a = 1 day missing, b = 2 days missing, c = 3 days, ..etc..,
z = 26 or more days missing, A = Accumulations present
Long-term means based on columns; thus, the monthly row may not
sum (or average) to the long-term annual value.
MAXIMUM ALLOWABLE NUMBER OF MISSING DAYS : 5
Individual Months not used for annual or monthly statistics if more than 5 days are missing.
Individual Years not used for annual statistics if any month in that year has more than 5 days missing.

YEAR(S)JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECANN
1934-----z-----z-----z-----z-----z-----z-----z0.00 1.03 1.56 1.21a0.86 4.66g
19350.35 0.77 0.26 -----z-----z1.18l1.07f0.58 -----z0.75 0.38 1.28 4.37e
19360.99a0.95a0.14 0.94y0.80 2.44 0.10 0.07 0.33 0.05 0.14 0.54 6.55a
19370.91 1.09 0.98 1.75 0.25 4.29 0.36 0.18 0.57 1.10 2.58 1.24 15.30
19381.17 1.03 1.70 0.30 0.04 0.25 0.15 0.03 0.16 0.69 0.35 0.73 6.60
19390.72 0.61 0.79 0.68 0.28 0.90 0.03 0.04 0.14 0.59 0.20 1.73 6.71
19401.04 3.58 0.99 1.32 0.37 0.13 1.02 0.00 1.07 1.43 1.13 1.89 13.97
19411.65 0.99 0.44 0.91 2.70 1.88 0.30 1.75 1.42 0.33 1.63 1.87 15.87
19421.09 1.21 0.22 0.91 2.17 2.22 0.74 0.13 0.15 0.27 1.75 1.09 11.95
19430.41 -----z0.65 0.58 0.56 1.12 0.00 0.68 0.00 1.09 0.30 0.71 6.10a
19441.10 1.01 0.13 1.77 0.56 1.70 0.02 0.11 0.40 0.23 3.41 0.64 11.08
19451.75 1.17 1.11 0.35 2.25 0.64 0.01 0.14 0.70 0.68 1.56 1.66 12.02
1946-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z0.00l
19470.32 0.23 0.36 1.03q0.58 0.55 0.74 0.00 0.78 2.95 0.13 1.29 7.93a
19480.89 0.58 0.05 2.31 5.52 3.26 1.60 1.57 1.50 0.52 1.03 1.54 20.37
19490.42 0.98 0.94 0.07 0.15 0.34 0.16 0.12 0.29 0.64 1.64 0.27 6.02
19501.60 1.30 1.60 0.67 1.65 1.51 0.23 -----z0.07 2.51 1.61 2.21 14.96a
19511.09 0.89 0.79 0.10 0.19 1.35 0.25 1.29 0.72 2.31 1.10 1.30 11.38
19521.52 0.56 0.40 0.69 0.57 1.23 0.08 0.02 0.22 0.00 0.37 1.29 6.95
19532.03 0.51 0.56 0.68 1.59 0.90 0.01 1.22 0.08 0.18 1.03 0.91 9.70
19541.06 0.38 0.69 0.23 1.23 0.85 0.37 0.64 1.51 0.05 1.49 0.52 9.02
19551.12 0.05 0.47 1.81 0.49 0.59 1.32 0.00 0.86 0.66 1.48 1.59 10.44
19562.08 0.70 0.32 0.81 0.47 1.13 0.20 1.20 0.03 1.53 0.29 0.51 9.27
19571.13 0.83 1.78 0.32 2.00 0.56 0.27 0.35 0.16 2.17 0.75 0.80 11.12
19581.73 2.26 0.60 1.05 0.51 1.14 0.70 0.00 0.37 0.46 1.65 1.29 11.76
19592.52 1.09 0.72 0.12 2.00 0.41 0.02 0.21 1.48 0.45 1.09 0.68 10.79
19601.11 1.16 0.97 0.37 2.26 0.15 0.00 0.23 0.57 0.37 2.30 1.40 10.89
19610.40 2.39 1.85 1.26 1.72 0.70 0.19 0.87 0.02 0.27 0.85 1.76 12.28
19620.48 1.10 0.93 0.69 1.99 0.39 0.02 0.80 0.64 1.36 1.30 1.30 11.00
19630.25 1.03 0.52 1.43 0.64 0.18 0.36 0.03 1.30 0.15 1.75 1.44 9.08
19641.03 0.11 0.37 0.20 0.17 1.21 0.02 0.57 0.15 0.16 1.69 3.20 8.88
19650.83 0.25 0.13 1.52 0.17 0.90 1.71 0.44 0.16 0.15 1.98 1.22 9.46
19660.71 0.03 0.41 0.09 0.30 1.02 1.04 0.17 0.47 0.23 2.05 1.57 8.09
19670.73 0.15 0.30 0.92 0.95 0.98 0.05 0.04 0.06 0.68 0.70 1.40 6.96
19681.44 0.96 0.08 0.44 0.79 0.27 0.17 1.71 0.10 1.05 1.93 2.11 11.05
19691.58 1.00 0.04 1.68 1.38 1.22 0.44 0.00 0.52 0.35 0.32 1.97 10.50
19702.43 0.73 0.93 0.29 0.38 0.25 0.06 0.00 0.33 0.70 1.48 1.77 9.35
19711.74 0.69 1.29 0.90 0.73 1.15 0.25 0.09 0.97 0.83 0.59 1.79 11.02
19720.49 0.26 1.02 0.66 3.09 1.24 0.16 1.17 0.86 0.38 1.25 1.68 12.26
19731.18 0.23 0.41 0.04 0.22 0.31 0.06 0.16 0.82 1.01 3.95 2.79 11.18
19740.70 0.99 1.19 0.65 0.48 0.07 1.18 0.00 0.13 0.04 1.72 2.58 9.73
19751.05 1.69 1.26 1.16 1.68 0.50 0.27 1.06 0.01 1.41 0.46 1.45 12.00
19760.61 0.63 0.61 0.96 0.91 0.92 0.33 1.28 0.09 0.28 0.13 0.26 7.01
19770.35 0.14 0.65 0.03 0.98 0.57 0.19 1.03 0.61 0.14 0.85 2.76 8.30
19781.35 1.34 0.95 1.65 0.58 0.05 1.65 1.36 0.70 0.00 0.69 0.68 11.00
19790.36 0.92 0.06 0.61 0.89 0.46 0.10 0.84 0.42 1.09 1.41 1.36 8.52
19802.04 3.12 1.11 1.48 3.32 0.99 0.06 0.47 1.53 0.90 1.01 1.97 18.00
19810.77 1.68 0.48 0.05 2.90 0.90 0.82 0.17 0.69 1.31 0.64 2.03 12.44
19820.61 0.76 1.05 0.59 0.41 1.41 0.63 0.26 0.53 0.84 1.43 1.14a9.66
19831.24 1.93 2.64 0.92 0.84 0.41h1.62 0.35 0.37 0.53 3.54 2.09 16.07a
19840.48 0.92a1.43 1.19 1.16 2.62 0.76 0.03 0.24 0.53 3.07 0.57 13.00
19850.30 0.69 0.18 0.00 0.29 0.29 0.03 0.04 2.08 0.55 1.87 0.96 7.28
19862.19 2.15 0.95 0.95 0.46 0.05 0.13 0.02 2.08 0.58 0.43 0.67 10.66
19870.97 0.21 2.29 0.31 0.95 0.49 -----z-----z0.00 0.03 0.47 1.77 7.49b
19880.67 0.03 0.55 0.98 1.09 0.69 0.00 0.00 0.42 0.31 2.15 0.87 7.76
19890.32 0.46a1.38 0.69 2.45 0.33 0.03 0.97 0.02 0.45 0.77 0.31 8.18
19901.12 0.54 0.36 1.25 1.95 1.86 1.27 1.43 0.00 0.87 0.20 0.40 11.25
19910.95 0.59 0.93 0.39 2.06 2.12 0.50 0.49 0.20 0.21 2.10 0.49 11.03
19921.62 0.93 0.68 1.10 0.12 0.97 1.92 0.10 0.15 0.62 1.33b1.93 11.47
19930.50 0.79 0.78 2.19 -----z1.77 2.94 0.59 0.53 0.04 0.17 1.99 12.29a
19940.39 0.44 0.14 1.67 1.57 0.67 0.09 0.04 0.07 0.65 1.21 1.23 8.17
19952.11 0.66 2.07a0.77 1.16 1.55 0.52 0.11 0.69 0.81 1.74 1.89 14.08
19961.04a1.75 0.48 1.27 1.61 2.58 0.39 0.03 0.70 1.63 1.38 3.44a16.30
19971.11 1.50 1.35 1.26 1.72 0.96 1.78 1.12 1.00 1.16 0.93 0.66 14.55
1998-----z1.46 1.12 0.52a1.70 -----z0.45 0.02 0.12 0.21 1.65 2.37 9.62b
19990.93 1.82 0.49 0.31 1.14 0.94 1.02 0.55 0.01 0.08 1.45 1.15 9.89
20001.31 1.09a1.55 0.58 0.81 0.55c0.51 0.00 0.08 0.37a0.97 1.09c8.91
20010.53a0.48 1.24 0.51 0.35 0.68a0.06 0.12 0.14 0.67a2.11 1.84 8.73
20021.03 0.65a0.20 0.19 0.61a0.32 0.10 0.06a0.03 0.07a0.98 2.69a6.93
20032.40 0.67 0.68a1.55 0.28 0.04a0.00 0.28 0.27 0.45 0.27 0.64b7.53
20040.69g0.83a0.61b0.54d0.90 0.28 0.17 1.07 0.48a0.87 0.11a0.91 6.77a
20050.98 0.01 0.58 1.55 2.42 1.27 0.24k0.10 0.08 1.19 1.52e2.32 12.02a
20062.22 1.02 0.81a2.01 1.35 1.40 0.16 0.00 0.27 1.49 1.46 0.83 13.02
20070.22 0.44 0.47 0.28 0.20 1.35b0.62 0.25 0.63 0.53 1.01 0.88 6.88
20081.10 0.18 0.97 0.47 0.24 0.87a0.15a0.15 0.24 0.45 1.33 1.66a7.81
20090.82 0.69 0.53 0.62 0.71 0.21 0.47 0.01 0.13 1.13a0.87 1.01 7.20
20101.06 1.25 0.69 0.75a2.15 2.31 0.10 0.04 1.19 1.15 1.03 0.99 12.71
20110.48 0.48 2.19 1.73 2.60 0.51 0.23 0.00 0.14 0.65 0.55 0.46 10.02
20120.90 0.61 4.13 1.15 0.45 3.66 0.50 0.00 0.00a1.42a1.75 1.23 15.80
20130.67 0.14 0.83 0.84 0.93 1.55 0.43 1.14 0.65 0.16 0.81 0.09 8.24
20140.49 0.65 1.41 1.23 0.84 1.39 0.06 1.76 0.35 1.73 1.44 1.43 12.78
20151.04 0.96 0.82 0.23 0.91 0.09 0.43 0.03 0.06 0.76 0.99 3.23 9.55
20161.90 0.43 1.82 0.65 0.96 1.28 0.58 0.00 0.42 3.98 1.43 0.79 14.24
20171.17 2.67 1.80 1.78 1.31a0.70 0.00 0.00 0.16 0.73 1.50 0.72 12.54
20182.04 0.74 1.40 1.40 0.55 0.15 0.03 0.04 0.02 1.45 0.94 1.29 10.05
20190.94 0.96 0.97 0.74 1.57 0.03 0.27 1.27 1.71 0.85 0.22 0.76 10.29
20201.75 0.86 0.36 0.21 1.17 1.78 0.02 0.30 0.60 0.93 1.08 2.37 11.43
20211.56 0.26 0.12 0.40 0.06 0.55 0.00 0.50 0.90 0.95 1.73a0.80 7.83
20220.63a0.09 0.63 1.14 0.79 2.34a0.60 0.00c0.02 0.12 1.86 2.59 10.81
20231.67 0.28 0.56 2.35 1.51a0.51 0.14 1.62b0.93a0.83a1.49 1.76 13.65
20241.56 0.80 0.74a0.78e-----z-----z-----z-----z-----z-----z-----z-----z3.88h
Period of Record Statistics
MEAN1.10 0.89 0.87 0.87 1.14 1.02 0.44 0.43 0.50 0.78 1.24 1.38 10.64
S.D.0.58 0.67 0.66 0.58 0.92 0.84 0.55 0.53 0.50 0.68 0.77 0.73 2.80
SKEW0.59 1.58 1.85 0.58 1.68 1.46 2.02 1.10 1.29 1.89 0.94 0.64 0.84
MAX2.52 3.58 4.13 2.35 5.52 4.29 2.94 1.76 2.08 3.98 3.95 3.44 20.37
MIN0.22 0.01 0.04 0.00 0.04 0.03 0.00 0.00 0.00 0.00 0.11 0.09 6.02
YRS87 88 89 86 86 85 85 87 88 89 89 89 77