(CIBW1) COLUMBIA - AT INTL BOUNDARY Discharge Monthly Volumes (kaf) from 01-20 to 05-20 Historical Observations Month FCST %Avg 90% 50% 10% May 3985 90 3175 4449 6764 Jan 2808 133 1484 2113 3068 Feb 6337 150 3095 4220 6706 Mar 5638 127 3228 4427 6366 Apr 3953 86 3194 4601 6833 Total 22722 115 14177 19809 29737 Historical Observations mm-dd FCST 90% 50% 10% 01-20 122278 63410 86500 131700 01-21 121418 63500 89350 131700 01-22 119518 63620 89900 128000 01-23 117742 63600 89400 125900 01-24 116768 62920 89800 131100 01-25 116585 63560 89150 131000 01-26 116694 63260 89150 131400 01-27 116819 59910 90050 130200 01-28 116949 60130 89900 128300 01-29 117085 60790 90200 123800 01-30 117089 61950 86050 125300 01-31 117122 61880 85900 128500 02-01 117118 61050 81200 136500 02-02 117253 57370 81400 137100 02-03 117097 62410 80200 135300 02-04 116750 59450 75950 136100 02-05 116423 57380 78350 132300 02-06 116199 56320 78050 133600 02-07 116136 54700 79300 125000 02-08 116068 52840 79400 124100 02-09 115965 53960 78700 126500 02-10 115827 55160 75800 118500 02-11 115655 56380 80150 118100 02-12 115550 53190 77300 119800 02-13 115573 55130 74850 120800 02-14 115658 50870 77500 119700 02-15 115568 51660 76900 118500 02-16 115367 49930 75950 118400 02-17 115355 55900 73400 115000 02-18 115256 55370 74200 115700 02-19 115118 56050 77600 113900 02-20 114935 57430 77650 114900 02-21 114902 54950 76050 115000 02-22 114889 56230 72800 114000 02-23 114757 57000 75400 116000 02-24 109458 55730 71850 113900 02-25 106115 57520 70800 114500 02-26 105809 56160 68400 112900 02-27 105637 55440 70300 111000 02-28 105409 55010 68550 104800 03-01 102639 54270 67600 103900 03-02 91543 53770 67450 99940 03-03 87302 52880 68600 100810 03-04 86994 55290 68700 97800 03-05 87094 51390 68200 96870 03-06 87291 49010 67100 94350 03-07 87639 52290 66500 93070 03-08 88029 52510 66700 92630 03-09 87990 51050 65550 92630 03-10 88008 50870 64550 99730 03-11 88782 53410 69500 96550 03-12 89099 49870 67700 102270 03-13 89525 49830 67750 103320 03-14 90218 54050 69700 101200 03-15 91114 54150 73350 96970 03-16 92220 56830 74450 99240 03-17 93246 53590 74500 98960 03-18 93760 54330 74950 98140 03-19 94976 58350 73150 99170 03-20 95908 51240 76950 103900 03-21 95719 49740 77050 103800 03-22 95569 51840 78650 111700 03-23 95057 52080 79200 117300 03-24 94384 49110 79550 118000 03-25 93863 51170 78950 114400 03-26 93384 50500 77750 109800 03-27 92506 53570 75400 111900 03-28 92253 56020 75900 113100 03-29 92421 53430 74200 114000 03-30 92270 53000 72650 113500 03-31 92231 48450 70150 111100 04-01 85914 48110 67900 100780 04-02 62690 42720 66700 101630 04-03 60177 41320 66000 98160 04-04 59577 44060 67500 100590 04-05 59106 45150 65100 95900 04-06 58807 45740 67650 94970 04-07 58587 45430 67400 99800 04-08 58475 47820 67650 102990 04-09 59124 50220 67950 109570 04-10 60411 47430 67400 108800 04-11 60543 46570 68500 102800 04-12 61312 49380 71100 110800 04-13 62138 49580 69100 113200 04-14 62836 51430 76500 111700 04-15 63702 53220 76200 104700 04-16 64595 56070 78050 107600 04-17 65419 53750 79050 106000 04-18 64964 53460 79100 111000 04-19 64685 54200 82400 119600 04-20 65675 55510 82200 113800 04-21 66871 53710 82750 115800 04-22 68109 55480 87650 119900 04-23 69867 61220 85600 122900 04-24 71867 62210 86600 129400 04-25 73923 64350 86200 135200 04-26 75492 67210 88600 134300 04-27 76307 66280 90200 139300 04-28 76844 63120 92300 145500 04-29 77528 67360 94350 145700 04-30 78070 68750 92450 143600 05-01 78616 67620 94850 143800 05-02 82179 69860 94550 141900 05-03 84878 76330 98350 141800 05-04 86277 70710 100750 145500 05-05 87700 73460 104500 151700 05-06 89299 70910 106000 161200 05-07 91203 75820 107000 164500 05-08 93574 70050 113500 161900 05-09 95785 71600 116000 163000 05-10 97401 73480 113000 157800 05-11 98622 81110 112000 161600 05-12 100403 78440 112000 168100 05-13 102906 77950 113500 179100 05-14 105852 89730 112500 190600 05-15 108852 86560 117000 194000 05-16 112134 88820 123000 195100 05-17 116519 92310 127500 193400 05-18 121480 91850 126000 196500 05-19 125993 95410 124500 196700 05-20 130049 99210 127000 202700