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Archive:
Water Year
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COLUMBIA - MCNARY DAM
(
MCDW1
)
Forecasts for Water Year
2026
Natural Forecast
ESP with 10 Days QPF
Ensemble:
2026-07-20
Issued:
2026-07-20
Hide Forecast
Forecast
Period
Forecasts Are in KAF
30 Year
Average
(1991-2020)
90 %
50 %
%
Average
10 %
APR-SEP
79780
80289
85
81495
94820
APR-JUL
67796
67796
83
67797
81590
APR-AUG
75238
75487
84
75810
89584
JAN-SEP
103535
104044
92
105250
113380
JAN-JUL
91551
91552
91
91552
100150
OCT-SEP
122026
122536
95
123741
128739
Experimental
HEFS with 15 days EQPF
Ensemble:
2026-07-20
Issued:
2026-07-20
Hide Forecast
APR-SEP
79721
80204
85
81405
94820
APR-JUL
67756
67785
83
67814
81590
APR-AUG
75169
75472
84
75726
89584
JAN-SEP
103476
103959
92
105160
113380
JAN-JUL
91511
91540
91
91569
100150
OCT-SEP
121967
122450
95
123652
128739
Reference
ESP with 0 Days QPF
Ensemble:
2026-07-20
Issued:
2026-07-20
Hide Forecast
APR-SEP
79913
80528
85
81750
94820
APR-JUL
67740
67790
83
67851
81590
APR-AUG
75235
75648
84
76004
89584
JAN-SEP
103668
104283
92
105505
113380
JAN-JUL
91496
91545
91
91606
100150
OCT-SEP
122160
122774
95
123996
128739
Move the mouse over the desired "Forecast Period" to display a graph.
ESP10, 253, 318, 359, 415, 451, 70, , 74
ESP10, 247, 317, 355, 411, 449, 73, , 77
ESP10, 244, 317, 351, 412, 448, 75, , 79
ESP10, 243, 314, 352, 413, 447, 77, , 81
ESP10, 243, 315, 352, 412, 446, 79, , 83
ESP10, 239, 310, 349, 412, 444, 82, , 86
ESP10, 241, 312, 352, 415, 445, 84, , 88
ESP10, 243, 315, 355, 417, 447, 86, , 90
ESP10, 240, 316, 356, 418, 447, 89, , 93
ESP10, 236, 313, 351, 414, 444, 91, , 95
ESP10, 234, 315, 352, 410, 443, 93, , 97
ESP10, 235, 318, 355, 411, 445, 95, , 99
ESP10, 229, 317, 349, 411, 444, 98, , 102
ESP10, 230, 318, 351, 414, 447, 100, , 104
ESP10, 228, 316, 345, 411, 445, 102, , 106
ESP10, 213, 303, 333, 402, 433, 104, , 108
ESP10, 204, 295, 326, 394, 425, 107, , 111
ESP10, 214, 303, 335, 403, 433, 109, , 113
ESP10, 217, 306, 337, 406, 434, 111, , 115
ESP10, 219, 308, 342, 406, 436, 114, , 118
ESP10, 207, 301, 334, 395, 427, 116, , 120
ESP10, 207, 306, 339, 403, 427, 118, , 122
ESP10, 201, 306, 334, 399, 424, 120, , 124
ESP10, 209, 322, 343, 407, 434, 123, , 127
ESP10, 212, 326, 351, 416, 438, 125, , 129
ESP10, 214, 327, 351, 420, 441, 127, , 131
ESP10, 214, 327, 351, 422, 439, 130, , 134
ESP10, 227, 330, 356, 424, 440, 132, , 136
ESP10, 219, 323, 352, 417, 435, 134, , 138
ESP10, 201, 309, 339, 405, 426, 136, , 140
ESP10, 200, 309, 339, 404, 424, 139, , 143
ESP10, 206, 312, 343, 409, 429, 141, , 145
ESP10, 216, 314, 343, 405, 432, 143, , 147
ESP10, 225, 323, 352, 413, 441, 145, , 149
ESP10, 231, 324, 356, 416, 443, 148, , 152
ESP10, 231, 326, 356, 416, 441, 150, , 154
ESP10, 232, 325, 355, 414, 442, 152, , 156
ESP10, 227, 318, 348, 406, 435, 155, , 159
ESP10, 234, 324, 354, 412, 441, 157, , 161
ESP10, 237, 322, 356, 410, 444, 159, , 163
ESP10, 243, 328, 359, 410, 451, 161, , 165
ESP10, 249, 337, 360, 412, 453, 164, , 168
ESP10, 259, 344, 369, 416, 459, 166, , 170
ESP10, 269, 345, 374, 425, 466, 168, , 172
ESP10, 266, 338, 370, 423, 462, 171, , 175
ESP10, 273, 342, 374, 426, 467, 173, , 177
ESP10, 268, 335, 370, 423, 466, 175, , 179
ESP10, 280, 341, 376, 428, 473, 177, , 181
ESP10, 283, 338, 374, 423, 473, 180, , 184
ESP10, 284, 341, 376, 425, 474, 182, , 186
ESP10, 282, 342, 374, 423, 472, 184, , 188
ESP10, 277, 341, 369, 418, 471, 187, , 191
ESP10, 275, 345, 371, 416, 468, 189, , 193
ESP10, 286, 355, 382, 427, 475, 191, , 195
ESP10, 283, 353, 379, 429, 471, 193, , 197
ESP10, 283, 352, 380, 430, 470, 196, , 200
ESP10, 275, 344, 377, 427, 466, 198, , 202
ESP10, 274, 342, 379, 430, 464, 200, , 204
ESP10, 277, 343, 381, 432, 465, 202, , 206
ESP10, 265, 327, 373, 419, 452, 205, , 209
ESP10, 254, 313, 364, 409, 442, 207, , 211
ESP10, 260, 320, 370, 414, 448, 209, , 213
ESP10, 248, 315, 361, 403, 440, 212, , 216
ESP10, 229, 293, 338, 384, 424, 214, , 218
ESP10, 232, 297, 341, 389, 431, 216, , 220
ESP10, 223, 294, 336, 385, 423, 218, , 222
ESP10, 230, 300, 346, 397, 431, 221, , 225
ESP10, 225, 294, 339, 393, 426, 223, , 227
ESP10, 210, 273, 320, 375, 414, 225, , 229
ESP10, 204, 268, 315, 367, 404, 228, , 232
ESP10, 201, 265, 313, 367, 405, 230, , 234
ESP10, 206, 263, 314, 371, 410, 232, , 236
ESP10, 204, 264, 315, 370, 411, 234, , 238
ESP10, 201, 259, 310, 365, 408, 237, , 241
ESP10, 205, 259, 313, 363, 410, 239, , 243
ESP10, 207, 256, 312, 362, 409, 241, , 245
ESP10, 205, 256, 315, 358, 409, 243, , 247
ESP10, 213, 260, 317, 358, 411, 246, , 250
ESP10, 214, 267, 320, 357, 412, 248, , 252
ESP10, 221, 269, 315, 354, 407, 250, , 254
ESP10, 232, 273, 319, 360, 410, 253, , 257
ESP10, 238, 275, 323, 364, 408, 255, , 259
ESP10, 251, 280, 332, 374, 416, 257, , 261
ESP10, 255, 281, 335, 379, 418, 259, , 263
ESP10, 247, 270, 326, 375, 411, 262, , 266
ESP10, 241, 265, 321, 374, 413, 264, , 268
ESP10, 242, 272, 323, 379, 416, 266, , 270
ESP10, 244, 278, 331, 384, 422, 269, , 273
ESP10, 242, 281, 330, 379, 420, 271, , 275
ESP10, 250, 285, 328, 379, 419, 273, , 277
ESP10, 257, 286, 337, 376, 420, 275, , 279
ESP10, 257, 288, 335, 375, 419, 278, , 282
ESP10, 251, 286, 329, 370, 413, 280, , 284
ESP10, 250, 295, 330, 377, 414, 282, , 286
ESP10, 242, 289, 326, 373, 407, 284, , 288
ESP10, 240, 290, 327, 374, 406, 287, , 291
ESP10, 237, 290, 325, 374, 407, 289, , 293
ESP10, 236, 291, 325, 375, 407, 291, , 295
ESP10, 241, 289, 325, 374, 406, 294, , 298
ESP10, 248, 288, 328, 372, 405, 296, , 300
ESP10, 245, 289, 330, 372, 404, 298, , 302
ESP10, 245, 292, 328, 372, 407, 300, , 304
ESP10, 243, 292, 327, 369, 406, 303, , 307
ESP10, 245, 294, 323, 366, 407, 305, , 309
ESP10, 251, 293, 328, 365, 410, 307, , 311
ESP10, 250, 298, 332, 366, 410, 310, , 314
ESP10, 247, 293, 334, 364, 407, 312, , 316
ESP10, 252, 299, 336, 367, 408, 314, , 318
ESP10, 254, 304, 336, 369, 407, 316, , 320
ESP10, 260, 318, 342, 376, 412, 319, , 323
ESP10, 267, 319, 343, 376, 412, 321, , 325
ESP10, 275, 321, 347, 379, 417, 323, , 327
ESP10, 281, 324, 350, 383, 417, 326, , 330
ESP10, 286, 329, 355, 387, 422, 328, , 332
ESP10, 287, 329, 357, 386, 423, 330, , 334
ESP10, 278, 329, 354, 385, 419, 332, , 336
ESP10, 284, 331, 358, 386, 421, 335, , 339
ESP10, 288, 331, 361, 387, 426, 337, , 341
ESP10, 290, 339, 361, 388, 428, 339, , 343
ESP10, 290, 343, 363, 388, 427, 341, , 345
ESP10, 293, 340, 360, 387, 424, 344, , 348
ESP10, 294, 338, 357, 383, 420, 346, , 350
ESP10, 287, 332, 351, 378, 417, 348, , 352
ESP10, 291, 332, 351, 380, 422, 351, , 355
ESP10, 296, 334, 351, 379, 423, 353, , 357
ESP10, 298, 337, 352, 380, 423, 355, , 359
ESP10, 293, 333, 350, 379, 419, 357, , 361
ESP10, 300, 339, 355, 385, 423, 360, , 364
ESP10, 300, 337, 353, 384, 421, 362, , 366
ESP10, 301, 336, 354, 383, 419, 364, , 368
ESP10, 301, 338, 354, 383, 416, 367, , 371
ESP10, 305, 340, 353, 383, 416, 369, , 373
ESP10, 305, 336, 350, 379, 410, 371, , 375
ESP10, 310, 339, 353, 383, 412, 373, , 377
ESP10, 306, 343, 355, 384, 409, 376, , 380
ESP10, 299, 332, 344, 375, 399, 378, , 382
ESP10, 298, 329, 343, 373, 399, 380, , 384
ESP10, 302, 335, 349, 376, 404, 382, , 386
ESP10, 288, 323, 338, 365, 394, 385, , 389
ESP10, 301, 335, 350, 376, 406, 387, , 391
ESP10, 293, 326, 343, 369, 401, 389, , 393
ESP10, 300, 333, 353, 377, 407, 392, , 396
ESP10, 305, 334, 352, 380, 406, 394, , 398
ESP10, 310, 339, 356, 385, 411, 396, , 400
ESP10, 313, 338, 358, 385, 413, 398, , 402
ESP10, 317, 342, 360, 389, 415, 401, , 405
ESP10, 321, 342, 362, 391, 414, 403, , 407
ESP10, 315, 336, 357, 382, 406, 405, , 409
ESP10, 312, 330, 355, 377, 401, 408, , 412
ESP10, 301, 324, 348, 369, 392, 410, , 414
ESP10, 305, 330, 354, 371, 395, 412, , 416
ESP10, 300, 327, 352, 368, 391, 414, , 418
ESP10, 292, 319, 349, 363, 383, 417, , 421
ESP10, 283, 313, 344, 358, 375, 419, , 423
ESP10, 280, 311, 342, 357, 369, 421, , 425
ESP10, 278, 311, 337, 355, 369, 424, , 428
ESP10, 270, 303, 330, 347, 360, 426, , 430
ESP10, 272, 306, 330, 347, 362, 428, , 432
ESP10, 264, 297, 319, 333, 350, 430, , 434
ESP10, 278, 309, 333, 346, 364, 433, , 437
ESP10, 278, 309, 328, 344, 362, 435, , 439
ESP10, 271, 304, 322, 339, 355, 437, , 441
ESP10, 274, 304, 321, 341, 356, 439, , 443
ESP10, 279, 308, 325, 346, 362, 442, , 446
ESP10, 278, 310, 326, 345, 360, 444, , 448
ESP10, 275, 308, 322, 342, 357, 446, , 450
ESP10, 269, 303, 317, 338, 352, 449, , 453
ESP10, 271, 304, 320, 343, 355, 451, , 455
ESP10, 273, 304, 319, 343, 357, 453, , 457
ESP10, 279, 307, 326, 345, 359, 455, , 459
ESP10, 281, 304, 324, 343, 357, 458, , 462
ESP10, 288, 306, 325, 344, 360, 460, , 464
ESP10, 290, 305, 324, 341, 360, 462, , 466
ESP10, 278, 294, 314, 331, 350, 465, , 469
ESP10, 272, 291, 310, 325, 343, 467, , 471
ESP10, 278, 297, 313, 332, 347, 469, , 473
ESP10, 274, 293, 313, 333, 345, 471, , 475
ESP10, 276, 295, 319, 338, 347, 474, , 478
ESP10, 278, 302, 324, 341, 354, 476, , 480
ESP10, 281, 303, 326, 345, 361, 478, , 482
ESP10, 288, 310, 336, 351, 364, 480, , 484
ESP10, 291, 311, 338, 352, 367, 483, , 487
ESP10, 289, 309, 336, 347, 364, 485, , 489
ESP10, 294, 319, 342, 354, 370, 487, , 491
ESP10, 292, 318, 341, 355, 368, 490, , 494
ESP10, 289, 315, 341, 357, 366, 492, , 496
ESP10, 292, 316, 341, 358, 366, 494, , 498
ESP10, 294, 323, 345, 362, 369, 496, , 500
ESP10, 292, 316, 341, 357, 364, 499, , 503
ESP10, 287, 311, 335, 349, 357, 501, , 505
ESP10, 282, 308, 330, 344, 352, 503, , 507
ESP10, 283, 309, 330, 344, 351, 506, , 510
ESP10, 282, 310, 330, 345, 352, 508, , 512
ESP10, 287, 314, 335, 349, 356, 510, , 514
ESP10, 286, 316, 332, 346, 351, 512, , 516
ESP10, 299, 325, 340, 354, 360, 515, , 519
ESP10, 296, 320, 338, 352, 357, 517, , 521
ESP10, 305, 327, 341, 356, 362, 519, , 523
ESP10, 306, 322, 340, 352, 359, 522, , 526
ESP10, 306, 322, 341, 353, 359, 524, , 528
ESP10, 309, 324, 340, 355, 360, 526, , 530
ESP10, 311, 325, 344, 357, 362, 528, , 532
ESP10, 313, 331, 349, 360, 366, 531, , 535
ESP10, 322, 343, 358, 369, 378, 533, , 537
ESP10, 321, 344, 357, 368, 380, 535, , 539
ESP10, 322, 346, 358, 370, 380, 537, , 541
ESP10, 322, 345, 358, 368, 379, 540, , 544
ESP10, 321, 347, 357, 367, 378, 542, , 546
ESP10, 323, 349, 359, 369, 380, 544, , 548
ESP10, 324, 348, 358, 367, 379, 547, , 551
ESP10, 325, 349, 359, 370, 379, 549, , 553
ESP10, 330, 353, 364, 374, 383, 551, , 555
ESP10, 332, 356, 367, 376, 388, 553, , 557
ESP10, 333, 356, 368, 378, 389, 556, , 560
ESP10, 334, 357, 368, 378, 388, 558, , 562
ESP10, 334, 356, 368, 379, 387, 560, , 564
ESP10, 335, 356, 368, 379, 386, 563, , 567
ESP10, 335, 356, 369, 379, 385, 565, , 569
ESP10, 333, 354, 367, 379, 387, 567, , 571
ESP10, 335, 358, 366, 379, 387, 569, , 573
ESP10, 338, 360, 368, 381, 387, 572, , 576
ESP10, 338, 357, 366, 379, 384, 574, , 578
ESP10, 341, 358, 366, 378, 384, 576, , 580
ESP10, 343, 357, 369, 379, 385, 578, , 582
ESP10, 340, 354, 368, 378, 383, 581, , 585
ESP10, 346, 354, 369, 379, 385, 583, , 587
ESP10, 348, 353, 368, 378, 384, 585, , 589
ESP10, 349, 355, 372, 379, 385, 588, , 592
ESP10, 351, 359, 373, 381, 386, 590, , 594
ESP10, 354, 365, 377, 385, 389, 592, , 596
ESP10, 350, 361, 373, 380, 385, 594, , 598
ESP10, 348, 360, 371, 379, 383, 597, , 601
ESP10, 349, 365, 373, 378, 383, 599, , 603
ESP10, 348, 362, 371, 375, 380, 601, , 605
ESP10, 348, 361, 371, 377, 381, 604, , 608
ESP10, 346, 358, 369, 373, 379, 606, , 610
ESP10, 347, 358, 368, 373, 379, 608, , 612
ESP10, 347, 360, 367, 373, 378, 610, , 614
ESP10, 353, 362, 370, 375, 381, 613, , 617
ESP10, 348, 357, 366, 371, 376, 615, , 619
ESP10, 351, 358, 368, 373, 379, 617, , 621
ESP10, 351, 357, 367, 373, 378, 619, , 623
ESP10, 352, 358, 368, 373, 379, 622, , 626
ESP10, 353, 359, 368, 375, 380, 624, , 628
ESP10, 354, 360, 367, 375, 380, 626, , 630
ESP10, 354, 360, 369, 374, 380, 629, , 633
ESP10, 358, 364, 372, 378, 383, 631, , 635
ESP10, 360, 368, 373, 380, 384, 633, , 637
ESP10, 361, 368, 375, 381, 385, 635, , 639
ESP10, 360, 368, 374, 380, 384, 638, , 642
ESP10, 366, 375, 380, 386, 390, 640, , 644
ESP10, 366, 375, 381, 387, 389, 642, , 646
ESP10, 371, 379, 386, 391, 394, 645, , 649
ESP10, 372, 377, 384, 389, 392, 647, , 651
ESP10, 373, 378, 384, 389, 392, 649, , 653
ESP10, 375, 380, 385, 390, 393, 651, , 655
ESP10, 375, 381, 386, 391, 394, 654, , 658
ESP10, 374, 380, 384, 390, 393, 656, , 660
ESP10, 374, 380, 385, 389, 393, 658, , 662
ESP10, 376, 382, 387, 391, 395, 661, , 665
ESP10, 376, 384, 388, 392, 395, 663, , 667
ESP10, 375, 383, 387, 392, 395, 665, , 669
ESP10, 376, 384, 388, 392, 396, 667, , 671
ESP10, 373, 381, 385, 390, 394, 670, , 674
ESP10, 381, 387, 392, 395, 399, 672, , 676
ESP10, 381, 387, 391, 395, 398, 674, , 678
ESP10, 381, 387, 391, 394, 398, 676, , 680
ESP10, 377, 383, 388, 391, 394, 679, , 683
ESP10, 378, 383, 387, 390, 394, 681, , 685
ESP10, 374, 380, 384, 387, 390, 683, , 687
ESP10, 376, 383, 387, 389, 393, 686, , 690
ESP10, 380, 384, 389, 393, 394, 688, , 692
ESP10, 380, 383, 388, 391, 393, 690, , 694
ESP10, 380, 383, 388, 391, 393, 692, , 696
ESP10, 380, 383, 387, 391, 392, 695, , 699
ESP10, 381, 385, 389, 392, 394, 697, , 701
ESP10, 386, 388, 391, 394, 396, 699, , 703
ESP10, 386, 388, 391, 394, 396, 702, , 706
ESP10, 386, 388, 392, 394, 396, 704, , 708
ESP10, 386, 388, 392, 394, 395, 706, , 710
ESP10, 386, 389, 392, 395, 395, 708, , 712
ESP10, 386, 390, 392, 395, 395, 711, , 715
ESP10, 386, 390, 391, 394, 395, 713, , 717
ESP10, 386, 389, 391, 394, 394, 715, , 719
ESP10, 385, 389, 391, 393, 394, 717, , 721
ESP10, 386, 390, 392, 394, 395, 720, , 724
ESP10, 386, 390, 392, 394, 395, 722, , 726
ESP10, 386, 391, 392, 394, 395, 724, , 728
ESP10, 386, 391, 392, 394, 395, 727, , 731
ESP10, 387, 391, 393, 394, 395, 729, , 733
ESP10, 387, 392, 393, 395, 395, 731, , 735
ESP10, 387, 391, 393, 394, 395, 733, , 737
Max Scale
Scale To Data
Scale To Last 45 Days
Show Min/Max Ensemble Volume
Show Tooltips Help
Overlay
ESP10
HEFS
ESP0
Data Files
/chpsesp/ensemble/natural/MCDW1N_SQIN.ESPF10.csv
MCDW1N_SQIN.ESPF0.csv|2026-07-20
MCDW1N_SQIN.ESPF10.csv|2026-07-20
MCDW1N_SQIN.ESPFM.csv|2026-07-20
APR-SEP
COLUMBIA - MCNARY DAM
(
MCDW1
)
Forecasts for Water Year
2027
Natural Forecast
ESP with 10 Days QPF
Ensemble:
2026-07-20
Issued:
2026-07-20
Hide Forecast
Forecast
Period
Forecasts Are in KAF
30 Year
Average
(1991-2020)
90 %
50 %
%
Average
10 %
APR-SEP
68475
90126
95
112839
94820
APR-JUL
56658
74511
91
92474
81590
APR-AUG
64034
84108
94
105600
89584
JAN-SEP
81898
106942
94
134496
113380
JAN-JUL
69907
90549
90
115033
100150
OCT-SEP
94255
119968
93
152750
128739
Move the mouse over the desired "Forecast Period" to display a graph.
Max Scale
Scale To Data
Scale To Last 45 Days
Show Min/Max Ensemble Volume
Show Tooltips Help
Overlay
ESP10
Data Files
/chpsesp/ensemble/natural/MCDW1N_SQIN.ESPF10.csv
MCDW1N_SQIN.ESPF0.csv|2026-07-20
MCDW1N_SQIN.ESPF10.csv|2026-07-20
MCDW1N_SQIN.ESPFM.csv|2026-07-20
APR-SEP
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ESP10,ESPM,ESP0
ESP10,ESPM,ESP0
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