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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:
2026-08-09
Issued:
2026-08-09
Hide Forecast
Forecast
Period
Forecasts Are in KAF
30 Year
Average
(1991-2020)
90 %
50 %
%
Average
10 %
APR-SEP
77531
77922
83
78820
94166
APR-JUL
67972
67972
83
67972
81933
APR-AUG
73348
73493
82
73644
89196
JAN-SEP
102727
103118
89
104016
115946
JAN-JUL
93168
93168
90
93168
103714
OCT-SEP
122612
123003
93
123902
132314
Experimental Water Supply
HEFS with 15 days EQPF
Ensemble:
2026-08-09
Issued:
2026-08-09
Hide Forecast
APR-SEP
77618
78156
83
79378
94166
APR-JUL
67972
67972
83
67972
81933
APR-AUG
73442
73639
83
73989
89196
JAN-SEP
102814
103352
89
104574
115946
JAN-JUL
93168
93168
90
93168
103714
OCT-SEP
122699
123237
93
124459
132314
Reference
ESP with 0 Days QPF
Ensemble:
2026-08-09
Issued:
2026-08-09
Hide Forecast
APR-SEP
77473
77938
83
78952
94166
APR-JUL
67972
67972
83
67972
81933
APR-AUG
73306
73497
82
73844
89196
JAN-SEP
102669
103134
89
104148
115946
JAN-JUL
93168
93168
90
93168
103714
OCT-SEP
122554
123020
93
124034
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, 77, , 81
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, 94, , 98
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, 109, , 113
ESP10, 224, 311, 344, 406, 436, 111, , 115
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, 126, , 130
ESP10, 231, 332, 357, 426, 440, 128, , 132
ESP10, 227, 326, 353, 420, 435, 130, , 134
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, 141, , 145
ESP10, 239, 327, 356, 416, 442, 143, , 147
ESP10, 239, 327, 356, 416, 441, 145, , 149
ESP10, 240, 327, 358, 414, 442, 147, , 151
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, 158, , 162
ESP10, 263, 346, 370, 416, 458, 160, , 164
ESP10, 273, 347, 375, 425, 465, 162, , 166
ESP10, 269, 339, 372, 423, 461, 164, , 168
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, 173, , 177
ESP10, 290, 345, 376, 426, 475, 175, , 179
ESP10, 288, 346, 374, 424, 473, 177, , 181
ESP10, 283, 344, 371, 419, 470, 179, , 183
ESP10, 281, 347, 371, 417, 468, 181, , 185
ESP10, 292, 356, 384, 428, 474, 183, , 187
ESP10, 289, 355, 382, 429, 470, 185, , 189
ESP10, 289, 354, 383, 430, 470, 187, , 191
ESP10, 282, 346, 378, 426, 465, 190, , 194
ESP10, 280, 344, 379, 430, 464, 192, , 196
ESP10, 283, 345, 383, 431, 464, 194, , 198
ESP10, 271, 329, 374, 419, 452, 196, , 200
ESP10, 258, 315, 365, 408, 441, 198, , 202
ESP10, 263, 323, 371, 413, 448, 200, , 204
ESP10, 251, 318, 363, 402, 440, 202, , 206
ESP10, 232, 296, 342, 383, 424, 205, , 209
ESP10, 234, 300, 343, 390, 428, 207, , 211
ESP10, 226, 297, 338, 385, 422, 209, , 213
ESP10, 232, 303, 348, 396, 429, 211, , 215
ESP10, 228, 296, 341, 392, 424, 213, , 217
ESP10, 214, 275, 322, 374, 412, 215, , 219
ESP10, 207, 269, 316, 366, 405, 217, , 221
ESP10, 204, 268, 316, 367, 406, 219, , 223
ESP10, 209, 266, 317, 372, 412, 222, , 226
ESP10, 208, 266, 317, 371, 411, 224, , 228
ESP10, 206, 261, 311, 366, 409, 226, , 230
ESP10, 208, 261, 314, 365, 409, 228, , 232
ESP10, 210, 259, 313, 362, 408, 230, , 234
ESP10, 207, 260, 315, 359, 408, 232, , 236
ESP10, 215, 263, 318, 359, 409, 234, , 238
ESP10, 217, 272, 321, 358, 412, 237, , 241
ESP10, 221, 275, 316, 355, 409, 239, , 243
ESP10, 232, 278, 320, 362, 411, 241, , 245
ESP10, 242, 280, 324, 364, 410, 243, , 247
ESP10, 255, 283, 333, 374, 418, 245, , 249
ESP10, 258, 283, 336, 380, 420, 247, , 251
ESP10, 251, 273, 327, 374, 413, 249, , 253
ESP10, 245, 269, 323, 375, 413, 252, , 256
ESP10, 247, 277, 325, 379, 416, 254, , 258
ESP10, 248, 284, 334, 383, 423, 256, , 260
ESP10, 247, 284, 333, 379, 420, 258, , 262
ESP10, 254, 286, 331, 379, 419, 260, , 264
ESP10, 261, 289, 339, 376, 421, 262, , 266
ESP10, 260, 292, 336, 374, 420, 264, , 268
ESP10, 255, 287, 330, 370, 415, 266, , 270
ESP10, 254, 296, 330, 376, 413, 269, , 273
ESP10, 245, 291, 328, 372, 408, 271, , 275
ESP10, 243, 292, 327, 374, 406, 273, , 277
ESP10, 240, 291, 326, 374, 406, 275, , 279
ESP10, 239, 293, 328, 375, 406, 277, , 281
ESP10, 244, 290, 328, 373, 404, 279, , 283
ESP10, 249, 290, 331, 372, 404, 281, , 285
ESP10, 248, 293, 332, 372, 407, 284, , 288
ESP10, 249, 294, 331, 371, 408, 286, , 290
ESP10, 247, 294, 329, 369, 408, 288, , 292
ESP10, 251, 298, 326, 367, 409, 290, , 294
ESP10, 256, 297, 332, 368, 416, 292, , 296
ESP10, 254, 299, 334, 367, 413, 294, , 298
ESP10, 251, 296, 336, 365, 410, 296, , 300
ESP10, 256, 300, 339, 368, 411, 298, , 302
ESP10, 258, 306, 338, 370, 410, 301, , 305
ESP10, 263, 319, 345, 377, 416, 303, , 307
ESP10, 267, 320, 346, 378, 415, 305, , 309
ESP10, 276, 322, 351, 382, 421, 307, , 311
ESP10, 282, 325, 351, 383, 422, 309, , 313
ESP10, 288, 330, 358, 389, 426, 311, , 315
ESP10, 289, 331, 359, 388, 427, 313, , 317
ESP10, 284, 331, 356, 386, 423, 316, , 320
ESP10, 290, 333, 358, 387, 425, 318, , 322
ESP10, 293, 334, 361, 388, 430, 320, , 324
ESP10, 295, 343, 362, 388, 429, 322, , 326
ESP10, 295, 347, 364, 388, 429, 324, , 328
ESP10, 298, 343, 361, 388, 426, 326, , 330
ESP10, 295, 342, 358, 385, 421, 328, , 332
ESP10, 288, 336, 352, 380, 416, 330, , 334
ESP10, 293, 336, 353, 381, 420, 333, , 337
ESP10, 300, 338, 354, 381, 423, 335, , 339
ESP10, 302, 340, 355, 383, 422, 337, , 341
ESP10, 297, 336, 352, 379, 419, 339, , 343
ESP10, 304, 342, 357, 385, 423, 341, , 345
ESP10, 304, 339, 355, 385, 421, 343, , 347
ESP10, 304, 340, 356, 385, 419, 345, , 349
ESP10, 306, 341, 358, 384, 417, 348, , 352
ESP10, 309, 342, 357, 385, 417, 350, , 354
ESP10, 308, 339, 352, 379, 411, 352, , 356
ESP10, 314, 343, 354, 384, 413, 354, , 358
ESP10, 311, 345, 356, 385, 410, 356, , 360
ESP10, 303, 334, 346, 376, 401, 358, , 362
ESP10, 301, 333, 345, 376, 401, 360, , 364
ESP10, 306, 339, 352, 381, 406, 362, , 366
ESP10, 294, 325, 340, 368, 396, 365, , 369
ESP10, 306, 337, 352, 380, 409, 367, , 371
ESP10, 299, 330, 347, 371, 404, 369, , 373
ESP10, 306, 336, 355, 378, 410, 371, , 375
ESP10, 307, 336, 354, 380, 409, 373, , 377
ESP10, 314, 339, 358, 385, 413, 375, , 379
ESP10, 317, 338, 359, 387, 413, 377, , 381
ESP10, 321, 345, 361, 391, 415, 380, , 384
ESP10, 324, 345, 363, 391, 415, 382, , 386
ESP10, 318, 340, 360, 383, 407, 384, , 388
ESP10, 313, 333, 356, 378, 402, 386, , 390
ESP10, 304, 327, 349, 369, 393, 388, , 392
ESP10, 307, 333, 355, 371, 396, 390, , 394
ESP10, 304, 331, 354, 369, 392, 392, , 396
ESP10, 295, 322, 350, 363, 384, 394, , 398
ESP10, 287, 317, 345, 359, 376, 397, , 401
ESP10, 284, 315, 344, 358, 371, 399, , 403
ESP10, 281, 313, 340, 356, 371, 401, , 405
ESP10, 274, 305, 332, 348, 363, 403, , 407
ESP10, 277, 308, 333, 349, 364, 405, , 409
ESP10, 269, 299, 321, 336, 353, 407, , 411
ESP10, 283, 312, 335, 347, 366, 409, , 413
ESP10, 283, 311, 330, 345, 364, 412, , 416
ESP10, 275, 305, 323, 341, 357, 414, , 418
ESP10, 280, 309, 323, 344, 359, 416, , 420
ESP10, 284, 313, 329, 350, 365, 418, , 422
ESP10, 283, 311, 328, 348, 363, 420, , 424
ESP10, 280, 310, 326, 346, 360, 422, , 426
ESP10, 274, 305, 321, 341, 355, 424, , 428
ESP10, 276, 308, 325, 348, 358, 426, , 430
ESP10, 280, 308, 325, 347, 362, 429, , 433
ESP10, 284, 310, 331, 349, 363, 431, , 435
ESP10, 287, 309, 330, 348, 362, 433, , 437
ESP10, 295, 313, 333, 350, 366, 435, , 439
ESP10, 299, 312, 333, 347, 367, 437, , 441
ESP10, 288, 301, 323, 337, 357, 439, , 443
ESP10, 283, 298, 319, 331, 351, 441, , 445
ESP10, 287, 303, 322, 338, 355, 444, , 448
ESP10, 282, 300, 320, 337, 352, 446, , 450
ESP10, 284, 302, 325, 343, 354, 448, , 452
ESP10, 286, 307, 331, 347, 360, 450, , 454
ESP10, 288, 310, 332, 350, 364, 452, , 456
ESP10, 295, 316, 341, 356, 369, 454, , 458
ESP10, 298, 317, 343, 357, 371, 456, , 460
ESP10, 295, 316, 341, 352, 369, 458, , 462
ESP10, 301, 325, 346, 359, 374, 461, , 465
ESP10, 299, 324, 346, 361, 373, 463, , 467
ESP10, 296, 322, 346, 362, 372, 465, , 469
ESP10, 299, 323, 346, 364, 372, 467, , 471
ESP10, 301, 329, 351, 368, 374, 469, , 473
ESP10, 300, 323, 348, 363, 369, 471, , 475
ESP10, 295, 318, 342, 356, 362, 473, , 477
ESP10, 293, 317, 338, 352, 359, 476, , 480
ESP10, 293, 317, 338, 351, 359, 478, , 482
ESP10, 292, 317, 338, 352, 360, 480, , 484
ESP10, 296, 320, 341, 355, 362, 482, , 486
ESP10, 294, 321, 338, 351, 357, 484, , 488
ESP10, 306, 329, 346, 359, 365, 486, , 490
ESP10, 303, 325, 345, 358, 363, 488, , 492
ESP10, 311, 332, 348, 361, 368, 490, , 494
ESP10, 314, 328, 346, 358, 365, 493, , 497
ESP10, 313, 328, 346, 358, 365, 495, , 499
ESP10, 316, 331, 347, 361, 367, 497, , 501
ESP10, 318, 333, 351, 363, 369, 499, , 503
ESP10, 319, 337, 354, 364, 371, 501, , 505
ESP10, 328, 347, 363, 373, 383, 503, , 507
ESP10, 326, 347, 361, 372, 382, 505, , 509
ESP10, 327, 348, 363, 373, 382, 508, , 512
ESP10, 326, 348, 361, 370, 382, 510, , 514
ESP10, 324, 348, 361, 369, 382, 512, , 516
ESP10, 326, 351, 363, 371, 383, 514, , 518
ESP10, 328, 351, 362, 370, 383, 516, , 520
ESP10, 329, 351, 364, 373, 383, 518, , 522
ESP10, 336, 355, 368, 378, 387, 520, , 524
ESP10, 338, 360, 370, 379, 392, 522, , 526
ESP10, 339, 360, 373, 381, 392, 525, , 529
ESP10, 340, 361, 373, 382, 391, 527, , 531
ESP10, 339, 360, 372, 381, 389, 529, , 533
ESP10, 340, 360, 372, 382, 389, 531, , 535
ESP10, 340, 359, 372, 383, 388, 533, , 537
ESP10, 340, 358, 371, 384, 389, 535, , 539
ESP10, 341, 361, 370, 384, 389, 537, , 541
ESP10, 344, 363, 371, 385, 389, 540, , 544
ESP10, 344, 362, 369, 383, 387, 542, , 546
ESP10, 346, 362, 370, 382, 387, 544, , 548
ESP10, 348, 362, 373, 383, 390, 546, , 550
ESP10, 346, 359, 372, 381, 387, 548, , 552
ESP10, 349, 359, 373, 383, 389, 550, , 554
ESP10, 350, 357, 372, 381, 388, 552, , 556
ESP10, 352, 359, 376, 382, 389, 554, , 558
ESP10, 355, 362, 377, 384, 390, 557, , 561
ESP10, 358, 367, 381, 388, 393, 559, , 563
ESP10, 354, 364, 377, 385, 390, 561, , 565
ESP10, 353, 363, 375, 383, 387, 563, , 567
ESP10, 355, 368, 375, 382, 387, 565, , 569
ESP10, 353, 366, 375, 379, 385, 567, , 571
ESP10, 354, 366, 375, 380, 385, 569, , 573
ESP10, 352, 363, 373, 377, 384, 572, , 576
ESP10, 353, 362, 371, 376, 383, 574, , 578
ESP10, 353, 365, 372, 377, 383, 576, , 580
ESP10, 357, 366, 373, 379, 385, 578, , 582
ESP10, 353, 362, 369, 375, 381, 580, , 584
ESP10, 357, 363, 372, 377, 383, 582, , 586
ESP10, 356, 363, 372, 378, 383, 584, , 588
ESP10, 358, 364, 373, 379, 384, 587, , 591
ESP10, 360, 366, 374, 381, 386, 589, , 593
ESP10, 361, 366, 373, 381, 386, 591, , 595
ESP10, 361, 366, 374, 380, 385, 593, , 597
ESP10, 364, 371, 376, 384, 388, 595, , 599
ESP10, 367, 374, 378, 386, 390, 597, , 601
ESP10, 369, 375, 380, 387, 392, 599, , 603
ESP10, 367, 374, 379, 386, 390, 601, , 605
ESP10, 373, 381, 386, 392, 395, 604, , 608
ESP10, 372, 381, 387, 392, 395, 606, , 610
ESP10, 377, 385, 391, 396, 399, 608, , 612
ESP10, 378, 383, 390, 395, 397, 610, , 614
ESP10, 378, 383, 390, 395, 397, 612, , 616
ESP10, 380, 385, 391, 396, 399, 614, , 618
ESP10, 381, 386, 391, 397, 399, 616, , 620
ESP10, 380, 386, 391, 395, 398, 619, , 623
ESP10, 379, 386, 391, 395, 398, 621, , 625
ESP10, 381, 388, 393, 397, 399, 623, , 627
ESP10, 382, 389, 394, 399, 400, 625, , 629
ESP10, 381, 388, 393, 398, 400, 627, , 631
ESP10, 381, 390, 394, 398, 401, 629, , 633
ESP10, 378, 387, 391, 396, 399, 631, , 635
ESP10, 386, 393, 397, 401, 405, 633, , 637
ESP10, 386, 392, 396, 401, 404, 636, , 640
ESP10, 387, 392, 397, 400, 405, 638, , 642
ESP10, 383, 389, 394, 397, 401, 640, , 644
ESP10, 383, 389, 394, 396, 400, 642, , 646
ESP10, 380, 387, 392, 393, 398, 644, , 648
ESP10, 383, 389, 394, 397, 400, 646, , 650
ESP10, 385, 391, 396, 398, 401, 648, , 652
ESP10, 385, 389, 395, 397, 400, 651, , 655
ESP10, 386, 389, 395, 398, 400, 653, , 657
ESP10, 386, 389, 394, 397, 399, 655, , 659
ESP10, 387, 391, 396, 399, 401, 657, , 661
ESP10, 392, 395, 399, 401, 403, 659, , 663
ESP10, 392, 395, 399, 402, 403, 661, , 665
ESP10, 392, 395, 399, 401, 403, 663, , 667
ESP10, 392, 395, 399, 401, 402, 665, , 669
ESP10, 393, 396, 399, 402, 403, 668, , 672
ESP10, 393, 397, 399, 402, 403, 670, , 674
ESP10, 392, 397, 399, 402, 402, 672, , 676
ESP10, 392, 396, 398, 401, 401, 674, , 678
ESP10, 391, 396, 398, 400, 401, 676, , 680
ESP10, 393, 398, 399, 402, 402, 678, , 682
ESP10, 392, 398, 399, 401, 402, 680, , 684
ESP10, 392, 397, 399, 401, 402, 683, , 687
ESP10, 392, 397, 400, 401, 402, 685, , 689
ESP10, 393, 398, 400, 402, 403, 687, , 691
ESP10, 393, 398, 400, 401, 402, 689, , 693
ESP10, 392, 397, 399, 401, 402, 691, , 695
ESP10, 392, 397, 399, 401, 402, 693, , 697
ESP10, 392, 397, 399, 401, 402, 695, , 699
ESP10, 393, 397, 399, 401, 402, 697, , 701
ESP10, 393, 397, 400, 401, 402, 700, , 704
ESP10, 394, 398, 400, 401, 403, 702, , 706
ESP10, 395, 398, 400, 402, 403, 704, , 708
ESP10, 395, 399, 400, 402, 403, 706, , 710
ESP10, 396, 400, 401, 403, 404, 708, , 712
ESP10, 396, 400, 401, 402, 404, 710, , 714
ESP10, 396, 400, 401, 402, 403, 712, , 716
ESP10, 397, 400, 401, 402, 403, 715, , 719
ESP10, 397, 400, 402, 403, 403, 717, , 721
ESP10, 397, 400, 402, 403, 403, 719, , 723
ESP10, 399, 401, 402, 403, 404, 721, , 725
ESP10, 398, 400, 402, 403, 403, 723, , 727
ESP10, 398, 401, 402, 403, 404, 725, , 729
ESP10, 398, 400, 402, 403, 403, 727, , 731
ESP10, 399, 401, 402, 403, 404, 729, , 733
ESP10, 397, 400, 401, 402, 403, 732, , 736
ESP10, 397, 401, 402, 403, 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|2026-08-09
TDAO3W_SQIN.ESPF10.csv|2026-08-09
TDAO3W_SQIN.ESPFM.csv|2026-08-09
APR-SEP
COLUMBIA - THE DALLES DAM
(
TDAO3
)
Forecasts for Water Year
2027
Official Water Supply
ESP with 10 Days QPF
Ensemble:
2026-08-09
Issued:
2026-08-09
Hide Forecast
Forecast
Period
Forecasts Are in KAF
30 Year
Average
(1991-2020)
90 %
50 %
%
Average
10 %
APR-SEP
66861
87988
93
111674
94166
APR-JUL
57063
76064
93
95544
81933
APR-AUG
62862
82855
93
105508
89196
JAN-SEP
82036
106638
92
134770
115946
JAN-JUL
72069
93533
90
118934
103714
OCT-SEP
94862
120772
91
153010
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|2026-08-09
TDAO3W_SQIN.ESPF10.csv|2026-08-09
TDAO3W_SQIN.ESPFM.csv|2026-08-09
APR-SEP
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ESP10,ESPM,ESP0
ESP10,ESPM,ESP0
Last Forecast
