(GCDW1) COLUMBIA - GRAND COULEE DAM Inflow Monthly Volumes (kaf) from 03-25 to 07-23 Historical Observations Month FCST %Avg 90% 50% 10% Jul 3570 64 4002 5553 8695 Mar 976 79 810 1242 1884 Apr 4513 79 3627 5728 8579 May 7552 85 6027 8865 14143 Jun 6892 72 6743 9573 15220 Total 23502 76 21210 30960 48520 Historical Observations mm-dd FCST 90% 50% 10% 03-25 68270 57968 95093 140122 03-26 68487 62105 85555 132106 03-27 68733 60758 93608 137825 03-28 68946 62090 91364 128550 03-29 71777 60292 89184 130893 03-30 73519 53378 84783 140828 03-31 72274 51769 86669 139761 04-01 71383 54392 83417 125519 04-02 69927 45461 81488 128459 04-03 68623 49164 82895 121885 04-04 69094 50028 80373 125850 04-05 69458 51337 80624 117056 04-06 69431 51496 82880 117567 04-07 69210 51003 83304 126225 04-08 68711 49405 82976 124791 04-09 68645 53541 82353 121390 04-10 68944 55163 88353 135991 04-11 68942 50703 85314 130652 04-12 69143 50822 93423 122131 04-13 69690 54090 94176 132404 04-14 71080 55551 94861 128611 04-15 73615 59592 99297 124578 04-16 75479 59907 98105 130697 04-17 75457 61070 87485 136988 04-18 75492 58912 96928 142500 04-19 76423 64068 98329 140135 04-20 77056 68236 100576 148865 04-21 77492 63765 106011 163423 04-22 78285 69817 108903 158992 04-23 79986 73566 108575 157322 04-24 81775 72053 112716 161283 04-25 83778 67947 109525 179348 04-26 85078 76244 111699 174109 04-27 87704 75624 108773 186666 04-28 91231 78890 115505 188544 04-29 92113 77323 115487 190537 04-30 92405 79982 114371 183578 05-01 92168 81033 115384 182513 05-02 92223 76658 113146 185228 05-03 92268 83194 116195 178003 05-04 93670 85317 113533 186645 05-05 100279 88301 119774 196587 05-06 102754 88512 122623 207798 05-07 104450 87415 128965 199720 05-08 106568 84994 134879 200641 05-09 108867 89294 134520 199011 05-10 112185 84453 131080 191211 05-11 113858 85398 131013 206370 05-12 116311 90618 132023 214915 05-13 117451 88087 133910 226937 05-14 118688 97967 136195 240234 05-15 120174 94092 137508 244864 05-16 122313 96561 140453 238088 05-17 125244 99943 144357 223581 05-18 128384 102448 150064 229395 05-19 132115 105608 148552 228474 05-20 134745 106033 150352 230927 05-21 136124 101256 148734 250494 05-22 137488 103517 156701 255898 05-23 139054 103744 157585 257351 05-24 140871 110300 156954 276995 05-25 141882 116518 164928 264259 05-26 143166 116254 161576 266349 05-27 145319 114719 170898 269543 05-28 146544 109133 172471 271552 05-29 147137 113812 184869 266775 05-30 147918 114807 180225 266336 05-31 148305 119522 180816 275576 06-01 146643 126990 178126 271213 06-02 135629 129100 179744 265620 06-03 135249 118525 180536 263273 06-04 135754 113380 180323 263176 06-05 134596 122086 178489 261795 06-06 133177 123707 173322 267657 06-07 131990 123637 173029 260823 06-08 130823 124969 176310 264671 06-09 128896 125014 175592 267877 06-10 126639 124302 173184 273454 06-11 123974 126772 167205 268813 06-12 121116 125089 159116 253895 06-13 117998 111249 161974 251532 06-14 115225 111680 159360 254486 06-15 112621 117966 161107 245830 06-16 113366 97368 154657 237050 06-17 115756 124935 150700 249740 06-18 115723 115833 152481 259074 06-19 112652 97190 146644 266214 06-20 109514 111184 152938 264526 06-21 107280 101557 152300 256939 06-22 104979 98108 154821 245356 06-23 102795 102329 150608 279488 06-24 100674 118170 152433 270467 06-25 98453 115648 152588 262782 06-26 96194 96195 154922 249863 06-27 94885 102490 151460 242438 06-28 93345 107622 146007 213298 06-29 90652 93123 138716 218199 06-30 88767 94427 138618 225675 07-01 89209 99715 131753 224198 07-02 103721 94664 134577 217203 07-03 97291 97854 129730 207063 07-04 93116 86147 124384 196074 07-05 90579 99360 135247 198768 07-06 88202 90859 131528 182764 07-07 85860 87676 137043 192274 07-08 82968 97020 123777 200228 07-09 80417 99864 126705 179247 07-10 78352 84896 129211 194392 07-11 79148 91750 126473 199112 07-12 79063 87579 127673 198118 07-13 78350 71343 125557 201666 07-14 76562 80136 119501 195097 07-15 75153 85808 114576 195152 07-16 72195 89872 116065 179924 07-17 69064 79606 111353 177737 07-18 66778 79559 112284 179160 07-19 65452 83578 111013 178788 07-20 63884 85986 108050 177203 07-21 62758 87646 110033 176879 07-22 61900 79281 104783 168276 07-23 60166 78046 108900 165222