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Water Year
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COLUMBIA - THE DALLES DAM
(
TDAO3
)
Forecasts for Water Year
2026
Official Water Supply
ESP with 10 Days QPF
Ensemble:
2026-08-11
Issued:
2026-08-11
Hide Forecast
Forecast
Period
Forecasts Are in KAF
30 Year
Average
(1991-2020)
90 %
50 %
%
Average
10 %
APR-SEP
77540
77881
83
78682
94166
APR-JUL
67976
67976
83
67976
81933
APR-AUG
73363
73482
82
73646
89196
JAN-SEP
102735
103077
89
103877
115946
JAN-JUL
93172
93172
90
93172
103714
OCT-SEP
122621
122962
93
123763
132314
Experimental Water Supply
HEFS with 15 days EQPF
Ensemble:
2026-08-11
Issued:
2026-08-11
Hide Forecast
APR-SEP
77677
78171
83
79401
94166
APR-JUL
67976
67976
83
67976
81933
APR-AUG
73508
73633
83
73968
89196
JAN-SEP
102873
103367
89
104597
115946
JAN-JUL
93172
93172
90
93172
103714
OCT-SEP
122759
123252
93
124482
132314
Reference
ESP with 0 Days QPF
Ensemble:
2026-08-11
Issued:
2026-08-11
Hide Forecast
APR-SEP
77474
77847
83
78866
94166
APR-JUL
67976
67976
83
67976
81933
APR-AUG
73304
73458
82
73759
89196
JAN-SEP
102669
103042
89
104062
115946
JAN-JUL
93172
93172
90
93172
103714
OCT-SEP
122555
122928
93
123947
132314
Move the mouse over the desired "Forecast Period" to display a graph.
ESP10, 257, 324, 361, 416, 451, 70, , 74
ESP10, 251, 320, 356, 411, 450, 72, , 76
ESP10, 249, 321, 352, 411, 448, 74, , 78
ESP10, 248, 317, 355, 412, 448, 76, , 80
ESP10, 247, 318, 354, 411, 446, 79, , 83
ESP10, 243, 313, 351, 411, 444, 81, , 85
ESP10, 245, 315, 354, 416, 445, 83, , 87
ESP10, 247, 318, 357, 417, 447, 85, , 89
ESP10, 244, 320, 358, 419, 447, 87, , 91
ESP10, 240, 317, 352, 414, 444, 89, , 93
ESP10, 238, 319, 354, 410, 443, 91, , 95
ESP10, 239, 322, 356, 412, 445, 93, , 97
ESP10, 234, 321, 349, 412, 444, 96, , 100
ESP10, 234, 321, 351, 414, 447, 98, , 102
ESP10, 233, 319, 345, 411, 444, 100, , 104
ESP10, 217, 306, 333, 403, 433, 102, , 106
ESP10, 209, 299, 327, 394, 425, 104, , 108
ESP10, 218, 307, 337, 403, 433, 106, , 110
ESP10, 222, 310, 338, 406, 434, 108, , 112
ESP10, 224, 311, 344, 406, 436, 110, , 114
ESP10, 212, 303, 336, 395, 427, 113, , 117
ESP10, 212, 307, 340, 402, 427, 115, , 119
ESP10, 206, 308, 335, 399, 425, 117, , 121
ESP10, 214, 322, 344, 407, 434, 119, , 123
ESP10, 217, 328, 353, 419, 438, 121, , 125
ESP10, 218, 329, 352, 423, 441, 123, , 127
ESP10, 219, 330, 352, 424, 439, 125, , 129
ESP10, 231, 332, 357, 426, 440, 127, , 131
ESP10, 227, 326, 353, 420, 435, 129, , 133
ESP10, 209, 312, 340, 409, 426, 132, , 136
ESP10, 209, 312, 340, 408, 425, 134, , 138
ESP10, 215, 314, 344, 411, 429, 136, , 140
ESP10, 224, 317, 343, 407, 431, 138, , 142
ESP10, 233, 325, 353, 414, 440, 140, , 144
ESP10, 239, 327, 356, 416, 442, 142, , 146
ESP10, 239, 327, 356, 416, 441, 144, , 148
ESP10, 240, 327, 358, 414, 442, 146, , 150
ESP10, 235, 321, 350, 407, 435, 149, , 153
ESP10, 242, 326, 356, 412, 440, 151, , 155
ESP10, 244, 324, 358, 410, 444, 153, , 157
ESP10, 249, 331, 360, 410, 450, 155, , 159
ESP10, 253, 339, 362, 412, 452, 157, , 161
ESP10, 263, 346, 370, 416, 458, 159, , 163
ESP10, 273, 347, 375, 425, 465, 161, , 165
ESP10, 269, 339, 372, 423, 461, 163, , 167
ESP10, 277, 343, 376, 426, 466, 166, , 170
ESP10, 272, 336, 373, 423, 465, 168, , 172
ESP10, 284, 343, 378, 429, 472, 170, , 174
ESP10, 289, 342, 374, 424, 473, 172, , 176
ESP10, 290, 345, 376, 426, 475, 174, , 178
ESP10, 288, 346, 374, 424, 473, 176, , 180
ESP10, 283, 344, 371, 419, 470, 178, , 182
ESP10, 281, 347, 371, 417, 468, 180, , 184
ESP10, 292, 356, 384, 428, 474, 182, , 186
ESP10, 289, 355, 382, 429, 470, 185, , 189
ESP10, 289, 354, 383, 430, 470, 187, , 191
ESP10, 282, 346, 378, 426, 465, 189, , 193
ESP10, 280, 344, 379, 430, 464, 191, , 195
ESP10, 283, 345, 383, 431, 464, 193, , 197
ESP10, 271, 329, 374, 419, 452, 195, , 199
ESP10, 258, 315, 365, 408, 441, 197, , 201
ESP10, 263, 323, 371, 413, 448, 199, , 203
ESP10, 251, 318, 363, 402, 440, 202, , 206
ESP10, 232, 296, 342, 383, 424, 204, , 208
ESP10, 234, 300, 343, 390, 428, 206, , 210
ESP10, 226, 297, 338, 385, 422, 208, , 212
ESP10, 232, 303, 348, 396, 429, 210, , 214
ESP10, 228, 296, 341, 392, 424, 212, , 216
ESP10, 214, 275, 322, 374, 412, 214, , 218
ESP10, 207, 269, 316, 366, 405, 216, , 220
ESP10, 204, 268, 316, 367, 406, 219, , 223
ESP10, 209, 266, 317, 372, 412, 221, , 225
ESP10, 208, 266, 317, 371, 411, 223, , 227
ESP10, 206, 261, 311, 366, 409, 225, , 229
ESP10, 208, 261, 314, 365, 409, 227, , 231
ESP10, 210, 259, 313, 362, 408, 229, , 233
ESP10, 207, 260, 315, 359, 408, 231, , 235
ESP10, 215, 263, 318, 359, 409, 233, , 237
ESP10, 217, 272, 321, 358, 412, 236, , 240
ESP10, 221, 275, 316, 355, 409, 238, , 242
ESP10, 232, 278, 320, 362, 411, 240, , 244
ESP10, 242, 280, 324, 364, 410, 242, , 246
ESP10, 255, 283, 333, 374, 418, 244, , 248
ESP10, 258, 283, 336, 380, 420, 246, , 250
ESP10, 251, 273, 327, 374, 413, 248, , 252
ESP10, 245, 269, 323, 375, 413, 250, , 254
ESP10, 247, 277, 325, 379, 416, 252, , 256
ESP10, 248, 284, 334, 383, 423, 255, , 259
ESP10, 247, 284, 333, 379, 420, 257, , 261
ESP10, 254, 286, 331, 379, 419, 259, , 263
ESP10, 261, 289, 339, 376, 421, 261, , 265
ESP10, 260, 292, 336, 374, 420, 263, , 267
ESP10, 255, 287, 330, 370, 415, 265, , 269
ESP10, 254, 296, 330, 376, 413, 267, , 271
ESP10, 245, 291, 328, 372, 408, 269, , 273
ESP10, 243, 292, 327, 374, 406, 272, , 276
ESP10, 240, 291, 326, 374, 406, 274, , 278
ESP10, 239, 293, 328, 375, 406, 276, , 280
ESP10, 244, 290, 328, 373, 404, 278, , 282
ESP10, 249, 290, 331, 372, 404, 280, , 284
ESP10, 248, 293, 332, 372, 407, 282, , 286
ESP10, 249, 294, 331, 371, 408, 284, , 288
ESP10, 247, 294, 329, 369, 408, 286, , 290
ESP10, 251, 298, 326, 367, 409, 289, , 293
ESP10, 256, 297, 332, 368, 416, 291, , 295
ESP10, 254, 299, 334, 367, 413, 293, , 297
ESP10, 251, 296, 336, 365, 410, 295, , 299
ESP10, 256, 300, 339, 368, 411, 297, , 301
ESP10, 258, 306, 338, 370, 410, 299, , 303
ESP10, 263, 319, 345, 377, 416, 301, , 305
ESP10, 267, 320, 346, 378, 415, 303, , 307
ESP10, 276, 322, 351, 382, 421, 305, , 309
ESP10, 282, 325, 351, 383, 422, 308, , 312
ESP10, 288, 330, 358, 389, 426, 310, , 314
ESP10, 289, 331, 359, 388, 427, 312, , 316
ESP10, 284, 331, 356, 386, 423, 314, , 318
ESP10, 290, 333, 358, 387, 425, 316, , 320
ESP10, 293, 334, 361, 388, 430, 318, , 322
ESP10, 295, 343, 362, 388, 429, 320, , 324
ESP10, 295, 347, 364, 388, 429, 322, , 326
ESP10, 298, 343, 361, 388, 426, 325, , 329
ESP10, 295, 342, 358, 385, 421, 327, , 331
ESP10, 288, 336, 352, 380, 416, 329, , 333
ESP10, 293, 336, 353, 381, 420, 331, , 335
ESP10, 300, 338, 354, 381, 423, 333, , 337
ESP10, 302, 340, 355, 383, 422, 335, , 339
ESP10, 297, 336, 352, 379, 419, 337, , 341
ESP10, 304, 342, 357, 385, 423, 339, , 343
ESP10, 304, 339, 355, 385, 421, 342, , 346
ESP10, 304, 340, 356, 385, 419, 344, , 348
ESP10, 306, 341, 358, 384, 417, 346, , 350
ESP10, 309, 342, 357, 385, 417, 348, , 352
ESP10, 308, 339, 352, 379, 411, 350, , 354
ESP10, 314, 343, 354, 384, 413, 352, , 356
ESP10, 311, 345, 356, 385, 410, 354, , 358
ESP10, 303, 334, 346, 376, 401, 356, , 360
ESP10, 301, 333, 345, 376, 401, 358, , 362
ESP10, 306, 339, 352, 381, 406, 361, , 365
ESP10, 294, 325, 340, 368, 396, 363, , 367
ESP10, 306, 337, 352, 380, 409, 365, , 369
ESP10, 299, 330, 347, 371, 404, 367, , 371
ESP10, 306, 336, 355, 378, 410, 369, , 373
ESP10, 307, 336, 354, 380, 409, 371, , 375
ESP10, 314, 339, 358, 385, 413, 373, , 377
ESP10, 317, 338, 359, 387, 413, 375, , 379
ESP10, 321, 345, 361, 391, 415, 378, , 382
ESP10, 324, 345, 363, 391, 415, 380, , 384
ESP10, 318, 340, 360, 383, 407, 382, , 386
ESP10, 313, 333, 356, 378, 402, 384, , 388
ESP10, 304, 327, 349, 369, 393, 386, , 390
ESP10, 307, 333, 355, 371, 396, 388, , 392
ESP10, 304, 331, 354, 369, 392, 390, , 394
ESP10, 295, 322, 350, 363, 384, 392, , 396
ESP10, 287, 317, 345, 359, 376, 395, , 399
ESP10, 284, 315, 344, 358, 371, 397, , 401
ESP10, 281, 313, 340, 356, 371, 399, , 403
ESP10, 274, 305, 332, 348, 363, 401, , 405
ESP10, 277, 308, 333, 349, 364, 403, , 407
ESP10, 269, 299, 321, 336, 353, 405, , 409
ESP10, 283, 312, 335, 347, 366, 407, , 411
ESP10, 283, 311, 330, 345, 364, 409, , 413
ESP10, 275, 305, 323, 341, 357, 411, , 415
ESP10, 280, 309, 323, 344, 359, 414, , 418
ESP10, 284, 313, 329, 350, 365, 416, , 420
ESP10, 283, 311, 328, 348, 363, 418, , 422
ESP10, 280, 310, 326, 346, 360, 420, , 424
ESP10, 274, 305, 321, 341, 355, 422, , 426
ESP10, 276, 308, 325, 348, 358, 424, , 428
ESP10, 280, 308, 325, 347, 362, 426, , 430
ESP10, 284, 310, 331, 349, 363, 428, , 432
ESP10, 287, 309, 330, 348, 362, 431, , 435
ESP10, 295, 313, 333, 350, 366, 433, , 437
ESP10, 299, 312, 333, 347, 367, 435, , 439
ESP10, 288, 301, 323, 337, 357, 437, , 441
ESP10, 283, 298, 319, 331, 351, 439, , 443
ESP10, 287, 303, 322, 338, 355, 441, , 445
ESP10, 282, 300, 320, 337, 352, 443, , 447
ESP10, 284, 302, 325, 343, 354, 445, , 449
ESP10, 286, 307, 331, 347, 360, 448, , 452
ESP10, 288, 310, 332, 350, 364, 450, , 454
ESP10, 295, 316, 341, 356, 369, 452, , 456
ESP10, 298, 317, 343, 357, 371, 454, , 458
ESP10, 295, 316, 341, 352, 369, 456, , 460
ESP10, 301, 325, 346, 359, 374, 458, , 462
ESP10, 299, 324, 346, 361, 373, 460, , 464
ESP10, 296, 322, 346, 362, 372, 462, , 466
ESP10, 299, 323, 346, 364, 372, 464, , 468
ESP10, 301, 329, 351, 368, 374, 467, , 471
ESP10, 300, 323, 348, 363, 369, 469, , 473
ESP10, 295, 318, 342, 356, 362, 471, , 475
ESP10, 293, 317, 338, 352, 359, 473, , 477
ESP10, 293, 317, 338, 351, 359, 475, , 479
ESP10, 292, 317, 338, 352, 360, 477, , 481
ESP10, 296, 320, 341, 355, 362, 479, , 483
ESP10, 294, 321, 338, 351, 357, 481, , 485
ESP10, 306, 329, 346, 359, 365, 484, , 488
ESP10, 303, 325, 345, 358, 363, 486, , 490
ESP10, 311, 332, 348, 361, 368, 488, , 492
ESP10, 314, 328, 346, 358, 365, 490, , 494
ESP10, 313, 328, 346, 358, 365, 492, , 496
ESP10, 316, 331, 347, 361, 367, 494, , 498
ESP10, 318, 333, 351, 363, 369, 496, , 500
ESP10, 319, 337, 354, 364, 371, 498, , 502
ESP10, 328, 347, 363, 373, 383, 501, , 505
ESP10, 326, 347, 361, 372, 382, 503, , 507
ESP10, 327, 348, 363, 373, 382, 505, , 509
ESP10, 326, 348, 361, 370, 382, 507, , 511
ESP10, 324, 348, 361, 369, 382, 509, , 513
ESP10, 326, 351, 363, 371, 383, 511, , 515
ESP10, 328, 351, 362, 370, 383, 513, , 517
ESP10, 329, 351, 364, 373, 383, 515, , 519
ESP10, 336, 355, 368, 378, 387, 517, , 521
ESP10, 338, 360, 370, 379, 392, 520, , 524
ESP10, 339, 360, 373, 381, 392, 522, , 526
ESP10, 340, 361, 373, 382, 391, 524, , 528
ESP10, 339, 360, 372, 381, 389, 526, , 530
ESP10, 340, 360, 372, 382, 389, 528, , 532
ESP10, 340, 359, 372, 383, 388, 530, , 534
ESP10, 340, 358, 371, 384, 389, 532, , 536
ESP10, 341, 361, 370, 384, 389, 534, , 538
ESP10, 344, 363, 371, 385, 389, 537, , 541
ESP10, 344, 362, 369, 383, 387, 539, , 543
ESP10, 346, 362, 370, 382, 387, 541, , 545
ESP10, 348, 362, 373, 383, 390, 543, , 547
ESP10, 346, 359, 372, 381, 387, 545, , 549
ESP10, 349, 359, 373, 383, 389, 547, , 551
ESP10, 350, 357, 372, 381, 388, 549, , 553
ESP10, 352, 359, 376, 382, 389, 551, , 555
ESP10, 355, 362, 377, 384, 390, 554, , 558
ESP10, 358, 367, 381, 388, 393, 556, , 560
ESP10, 354, 364, 377, 385, 390, 558, , 562
ESP10, 353, 363, 375, 383, 387, 560, , 564
ESP10, 355, 368, 375, 382, 387, 562, , 566
ESP10, 353, 366, 375, 379, 385, 564, , 568
ESP10, 354, 366, 375, 380, 385, 566, , 570
ESP10, 352, 363, 373, 377, 384, 568, , 572
ESP10, 353, 362, 371, 376, 383, 571, , 575
ESP10, 353, 365, 372, 377, 383, 573, , 577
ESP10, 357, 366, 373, 379, 385, 575, , 579
ESP10, 353, 362, 369, 375, 381, 577, , 581
ESP10, 357, 363, 372, 377, 383, 579, , 583
ESP10, 356, 363, 372, 378, 383, 581, , 585
ESP10, 358, 364, 373, 379, 384, 583, , 587
ESP10, 360, 366, 374, 381, 386, 585, , 589
ESP10, 361, 366, 373, 381, 386, 587, , 591
ESP10, 361, 366, 374, 380, 385, 590, , 594
ESP10, 364, 371, 376, 384, 388, 592, , 596
ESP10, 367, 374, 378, 386, 390, 594, , 598
ESP10, 369, 375, 380, 387, 392, 596, , 600
ESP10, 367, 374, 379, 386, 390, 598, , 602
ESP10, 373, 381, 386, 392, 395, 600, , 604
ESP10, 372, 381, 387, 392, 395, 602, , 606
ESP10, 377, 385, 391, 396, 399, 604, , 608
ESP10, 378, 383, 390, 395, 397, 607, , 611
ESP10, 378, 383, 390, 395, 397, 609, , 613
ESP10, 380, 385, 391, 396, 399, 611, , 615
ESP10, 381, 386, 391, 397, 399, 613, , 617
ESP10, 380, 386, 391, 395, 398, 615, , 619
ESP10, 379, 386, 391, 395, 398, 617, , 621
ESP10, 381, 388, 393, 397, 399, 619, , 623
ESP10, 382, 389, 394, 399, 400, 621, , 625
ESP10, 381, 388, 393, 398, 400, 624, , 628
ESP10, 381, 390, 394, 398, 401, 626, , 630
ESP10, 378, 387, 391, 396, 399, 628, , 632
ESP10, 386, 393, 397, 401, 405, 630, , 634
ESP10, 386, 392, 396, 401, 404, 632, , 636
ESP10, 387, 392, 397, 400, 405, 634, , 638
ESP10, 383, 389, 394, 397, 401, 636, , 640
ESP10, 383, 389, 394, 396, 400, 638, , 642
ESP10, 380, 387, 392, 393, 398, 640, , 644
ESP10, 383, 389, 394, 397, 400, 643, , 647
ESP10, 385, 391, 396, 398, 401, 645, , 649
ESP10, 385, 389, 395, 397, 400, 647, , 651
ESP10, 386, 389, 395, 398, 400, 649, , 653
ESP10, 386, 389, 394, 397, 399, 651, , 655
ESP10, 387, 391, 396, 399, 401, 653, , 657
ESP10, 392, 395, 399, 401, 403, 655, , 659
ESP10, 392, 395, 399, 402, 403, 657, , 661
ESP10, 392, 395, 399, 401, 403, 660, , 664
ESP10, 392, 395, 399, 401, 402, 662, , 666
ESP10, 393, 396, 399, 402, 403, 664, , 668
ESP10, 393, 397, 399, 402, 403, 666, , 670
ESP10, 392, 397, 399, 402, 402, 668, , 672
ESP10, 392, 396, 398, 401, 401, 670, , 674
ESP10, 391, 396, 398, 400, 401, 672, , 676
ESP10, 393, 398, 399, 402, 402, 674, , 678
ESP10, 392, 398, 399, 401, 402, 677, , 681
ESP10, 392, 397, 399, 401, 402, 679, , 683
ESP10, 392, 397, 400, 401, 402, 681, , 685
ESP10, 393, 398, 400, 402, 403, 683, , 687
ESP10, 393, 398, 400, 401, 402, 685, , 689
ESP10, 392, 397, 399, 401, 402, 687, , 691
ESP10, 392, 397, 399, 401, 402, 689, , 693
ESP10, 392, 397, 399, 401, 402, 691, , 695
ESP10, 393, 397, 399, 401, 402, 693, , 697
ESP10, 393, 397, 400, 401, 402, 696, , 700
ESP10, 394, 398, 400, 401, 403, 698, , 702
ESP10, 395, 398, 400, 402, 403, 700, , 704
ESP10, 395, 399, 400, 402, 403, 702, , 706
ESP10, 396, 400, 401, 403, 404, 704, , 708
ESP10, 396, 400, 401, 402, 404, 706, , 710
ESP10, 396, 400, 401, 402, 403, 708, , 712
ESP10, 397, 400, 401, 402, 403, 710, , 714
ESP10, 397, 400, 402, 403, 403, 713, , 717
ESP10, 397, 400, 402, 403, 403, 715, , 719
ESP10, 399, 401, 402, 403, 404, 717, , 721
ESP10, 398, 400, 402, 403, 403, 719, , 723
ESP10, 398, 401, 402, 403, 404, 721, , 725
ESP10, 398, 400, 402, 403, 403, 723, , 727
ESP10, 399, 401, 402, 403, 404, 725, , 729
ESP10, 397, 400, 401, 402, 403, 727, , 731
ESP10, 397, 401, 402, 403, 403, 730, , 734
ESP10, 398, 401, 402, 403, 403, 732, , 736
ESP10, 398, 400, 402, 402, 403, 734, , 738
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/watersupply/TDAO3W_SQIN.ESPF10.csv
TDAO3W_SQIN.ESPF0.csv|2026-08-11
TDAO3W_SQIN.ESPF10.csv|2026-08-11
TDAO3W_SQIN.ESPFM.csv|2026-08-11
APR-SEP
COLUMBIA - THE DALLES DAM
(
TDAO3
)
Forecasts for Water Year
2027
Official Water Supply
ESP with 10 Days QPF
Ensemble:
2026-08-11
Issued:
2026-08-11
Hide Forecast
Forecast
Period
Forecasts Are in KAF
30 Year
Average
(1991-2020)
90 %
50 %
%
Average
10 %
APR-SEP
67170
88815
94
112125
94166
APR-JUL
57358
76412
93
95994
81933
APR-AUG
63165
83724
94
105949
89196
JAN-SEP
82441
106984
92
133539
115946
JAN-JUL
72459
93767
90
119012
103714
OCT-SEP
95344
121217
92
152769
132314
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/watersupply/TDAO3W_SQIN.ESPF10.csv
TDAO3W_SQIN.ESPF0.csv|2026-08-11
TDAO3W_SQIN.ESPF10.csv|2026-08-11
TDAO3W_SQIN.ESPFM.csv|2026-08-11
APR-SEP
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ESP10,ESPM,ESP0
ESP10,ESPM,ESP0
Last Forecast
