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Water Year
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SNAKE - BELOW SWAN FALLS
(
SWAI1
)
Forecasts for Water Year
2026
Official Water Supply
ESP with 10 Days QPF
Ensemble:
2026-08-15
Issued:
2026-08-15
Hide Forecast
Forecast
Period
Forecasts Are in KAF
30 Year
Average
(1991-2020)
90 %
50 %
%
Average
10 %
APR-SEP
1988
2002
61
2104
3258
APR-JUL
1255
1255
52
1255
2405
APR-AUG
1598
1600
57
1615
2812
JAN-SEP
3110
3124
62
3226
5020
JAN-JUL
2377
2377
57
2377
4166
OCT-SEP
4396
4410
67
4512
6584
Experimental Water Supply
HEFS with 15 days EQPF
Ensemble:
2026-08-15
Issued:
2026-08-15
Hide Forecast
APR-SEP
1988
2002
61
2104
3258
APR-JUL
1255
1255
52
1255
2405
APR-AUG
1598
1600
57
1615
2812
JAN-SEP
3110
3124
62
3226
5020
JAN-JUL
2377
2377
57
2377
4166
OCT-SEP
4396
4410
67
4512
6584
Reference
ESP with 0 Days QPF
Ensemble:
2026-08-15
Issued:
2026-08-15
Hide Forecast
APR-SEP
1988
2002
61
2104
3258
APR-JUL
1255
1255
52
1255
2405
APR-AUG
1598
1600
57
1615
2812
JAN-SEP
3110
3124
62
3227
5020
JAN-JUL
2377
2377
57
2377
4166
OCT-SEP
4396
4410
67
4512
6584
Move the mouse over the desired "Forecast Period" to display a graph.
ESP10, 218, 324, 430, 450, 471, 70, , 74
ESP10, 232, 308, 430, 457, 471, 72, , 76
ESP10, 232, 311, 431, 461, 472, 74, , 78
ESP10, 234, 309, 428, 456, 471, 76, , 80
ESP10, 234, 310, 426, 460, 471, 78, , 82
ESP10, 231, 317, 434, 459, 469, 81, , 85
ESP10, 227, 307, 428, 461, 472, 83, , 87
ESP10, 225, 284, 422, 453, 472, 85, , 89
ESP10, 206, 283, 418, 455, 468, 87, , 91
ESP10, 184, 273, 415, 451, 464, 89, , 93
ESP10, 182, 262, 396, 451, 465, 91, , 95
ESP10, 173, 263, 405, 453, 466, 93, , 97
ESP10, 201, 270, 415, 452, 468, 95, , 99
ESP10, 187, 269, 414, 443, 461, 97, , 101
ESP10, 185, 272, 417, 447, 464, 99, , 103
ESP10, 205, 267, 405, 444, 459, 102, , 106
ESP10, 180, 258, 400, 440, 462, 104, , 108
ESP10, 180, 259, 400, 444, 461, 106, , 110
ESP10, 185, 259, 408, 447, 462, 108, , 112
ESP10, 198, 260, 421, 451, 460, 110, , 114
ESP10, 188, 259, 401, 446, 463, 112, , 116
ESP10, 211, 267, 420, 448, 463, 114, , 118
ESP10, 218, 274, 420, 451, 462, 116, , 120
ESP10, 215, 270, 423, 454, 467, 118, , 122
ESP10, 234, 307, 429, 453, 467, 120, , 124
ESP10, 234, 303, 425, 453, 467, 122, , 126
ESP10, 234, 344, 424, 456, 467, 125, , 129
ESP10, 213, 344, 427, 456, 467, 127, , 131
ESP10, 241, 345, 428, 456, 467, 129, , 133
ESP10, 186, 298, 418, 452, 463, 131, , 135
ESP10, 186, 304, 414, 450, 461, 133, , 137
ESP10, 220, 343, 429, 452, 464, 135, , 139
ESP10, 249, 385, 427, 455, 468, 137, , 141
ESP10, 211, 346, 426, 455, 471, 139, , 143
ESP10, 211, 346, 426, 454, 470, 141, , 145
ESP10, 230, 348, 415, 459, 471, 143, , 147
ESP10, 229, 345, 420, 451, 470, 145, , 149
ESP10, 215, 332, 408, 453, 470, 148, , 152
ESP10, 237, 318, 404, 450, 470, 150, , 154
ESP10, 236, 374, 423, 454, 470, 152, , 156
ESP10, 252, 356, 434, 459, 472, 154, , 158
ESP10, 241, 343, 422, 455, 471, 156, , 160
ESP10, 249, 350, 432, 461, 470, 158, , 162
ESP10, 258, 384, 443, 460, 470, 160, , 164
ESP10, 255, 391, 444, 463, 472, 162, , 166
ESP10, 259, 396, 443, 464, 473, 164, , 168
ESP10, 259, 402, 446, 460, 473, 166, , 170
ESP10, 263, 405, 439, 463, 477, 169, , 173
ESP10, 260, 405, 437, 462, 474, 171, , 175
ESP10, 258, 418, 444, 458, 473, 173, , 177
ESP10, 258, 419, 448, 461, 473, 175, , 179
ESP10, 258, 410, 441, 463, 476, 177, , 181
ESP10, 280, 416, 447, 467, 477, 179, , 183
ESP10, 280, 418, 450, 467, 477, 181, , 185
ESP10, 280, 400, 449, 468, 479, 183, , 187
ESP10, 280, 417, 449, 464, 479, 185, , 189
ESP10, 259, 393, 446, 462, 478, 187, , 191
ESP10, 276, 426, 451, 463, 478, 189, , 193
ESP10, 295, 402, 451, 463, 478, 192, , 196
ESP10, 279, 378, 442, 466, 474, 194, , 198
ESP10, 264, 364, 416, 451, 467, 196, , 200
ESP10, 284, 360, 442, 462, 473, 198, , 202
ESP10, 265, 382, 435, 454, 470, 200, , 204
ESP10, 259, 378, 418, 451, 473, 202, , 206
ESP10, 263, 377, 421, 446, 469, 204, , 208
ESP10, 262, 370, 418, 458, 473, 206, , 210
ESP10, 260, 337, 431, 458, 469, 208, , 212
ESP10, 276, 396, 426, 457, 475, 210, , 214
ESP10, 290, 351, 432, 451, 475, 212, , 216
ESP10, 271, 402, 427, 457, 473, 215, , 219
ESP10, 265, 333, 432, 458, 470, 217, , 221
ESP10, 255, 319, 432, 453, 471, 219, , 223
ESP10, 244, 288, 428, 450, 469, 221, , 225
ESP10, 251, 285, 428, 450, 465, 223, , 227
ESP10, 253, 312, 430, 452, 470, 225, , 229
ESP10, 246, 274, 430, 449, 466, 227, , 231
ESP10, 206, 263, 397, 443, 458, 229, , 233
ESP10, 226, 279, 387, 448, 456, 231, , 235
ESP10, 227, 274, 406, 448, 457, 233, , 237
ESP10, 238, 279, 406, 446, 460, 236, , 240
ESP10, 237, 279, 408, 445, 459, 238, , 242
ESP10, 236, 270, 415, 444, 458, 240, , 244
ESP10, 249, 301, 419, 445, 455, 242, , 246
ESP10, 241, 302, 421, 445, 456, 244, , 248
ESP10, 242, 274, 404, 444, 453, 246, , 250
ESP10, 242, 273, 419, 445, 456, 248, , 252
ESP10, 242, 289, 429, 444, 457, 250, , 254
ESP10, 247, 299, 426, 447, 460, 252, , 256
ESP10, 252, 298, 430, 447, 459, 254, , 258
ESP10, 260, 326, 407, 439, 460, 256, , 260
ESP10, 238, 287, 407, 443, 452, 259, , 263
ESP10, 241, 272, 407, 442, 458, 261, , 265
ESP10, 242, 303, 406, 442, 458, 263, , 267
ESP10, 236, 281, 406, 435, 453, 265, , 269
ESP10, 240, 272, 410, 439, 455, 267, , 271
ESP10, 237, 272, 375, 442, 455, 269, , 273
ESP10, 237, 272, 410, 443, 453, 271, , 275
ESP10, 241, 272, 410, 443, 457, 273, , 277
ESP10, 241, 272, 410, 442, 455, 275, , 279
ESP10, 242, 290, 410, 443, 457, 277, , 281
ESP10, 243, 280, 415, 443, 457, 279, , 283
ESP10, 258, 297, 415, 446, 457, 282, , 286
ESP10, 261, 331, 410, 441, 457, 284, , 288
ESP10, 266, 306, 415, 445, 453, 286, , 290
ESP10, 274, 333, 412, 440, 461, 288, , 292
ESP10, 278, 331, 405, 441, 458, 290, , 294
ESP10, 267, 323, 410, 444, 454, 292, , 296
ESP10, 279, 340, 411, 436, 461, 294, , 298
ESP10, 279, 348, 412, 439, 458, 296, , 300
ESP10, 295, 348, 407, 433, 453, 298, , 302
ESP10, 285, 338, 407, 438, 463, 300, , 304
ESP10, 299, 336, 407, 443, 460, 303, , 307
ESP10, 314, 348, 415, 444, 456, 305, , 309
ESP10, 321, 383, 419, 443, 457, 307, , 311
ESP10, 342, 390, 419, 445, 462, 309, , 313
ESP10, 326, 388, 424, 446, 457, 311, , 315
ESP10, 326, 388, 425, 444, 458, 313, , 317
ESP10, 326, 390, 426, 445, 461, 315, , 319
ESP10, 342, 390, 427, 448, 461, 317, , 321
ESP10, 334, 367, 430, 446, 461, 319, , 323
ESP10, 334, 394, 433, 448, 461, 321, , 325
ESP10, 354, 408, 437, 449, 462, 323, , 327
ESP10, 343, 394, 434, 449, 463, 326, , 330
ESP10, 317, 354, 418, 445, 458, 328, , 332
ESP10, 329, 359, 413, 448, 460, 330, , 334
ESP10, 337, 372, 417, 449, 467, 332, , 336
ESP10, 343, 380, 425, 452, 468, 334, , 338
ESP10, 337, 370, 422, 453, 467, 336, , 340
ESP10, 338, 372, 422, 448, 467, 338, , 342
ESP10, 342, 384, 415, 449, 462, 340, , 344
ESP10, 334, 369, 416, 441, 456, 342, , 346
ESP10, 315, 359, 406, 441, 448, 344, , 348
ESP10, 340, 362, 413, 442, 458, 346, , 350
ESP10, 338, 388, 429, 448, 460, 349, , 353
ESP10, 365, 411, 438, 448, 456, 351, , 355
ESP10, 359, 396, 436, 451, 461, 353, , 357
ESP10, 368, 406, 434, 447, 459, 355, , 359
ESP10, 328, 361, 421, 445, 459, 357, , 361
ESP10, 327, 370, 425, 445, 459, 359, , 363
ESP10, 346, 386, 430, 448, 456, 361, , 365
ESP10, 346, 386, 427, 449, 460, 363, , 367
ESP10, 330, 398, 434, 449, 458, 365, , 369
ESP10, 353, 381, 432, 445, 461, 367, , 371
ESP10, 354, 387, 424, 450, 463, 370, , 374
ESP10, 354, 375, 414, 445, 460, 372, , 376
ESP10, 358, 387, 432, 451, 462, 374, , 378
ESP10, 358, 395, 436, 451, 456, 376, , 380
ESP10, 365, 402, 435, 450, 464, 378, , 382
ESP10, 340, 405, 431, 450, 460, 380, , 384
ESP10, 341, 373, 417, 449, 454, 382, , 386
ESP10, 353, 399, 432, 450, 460, 384, , 388
ESP10, 348, 391, 432, 451, 462, 386, , 390
ESP10, 355, 401, 436, 452, 465, 388, , 392
ESP10, 342, 396, 439, 453, 464, 390, , 394
ESP10, 374, 406, 435, 454, 467, 393, , 397
ESP10, 363, 407, 437, 448, 461, 395, , 399
ESP10, 357, 409, 438, 448, 457, 397, , 401
ESP10, 352, 404, 437, 451, 464, 399, , 403
ESP10, 390, 429, 441, 456, 465, 401, , 405
ESP10, 377, 402, 443, 455, 467, 403, , 407
ESP10, 377, 426, 441, 456, 461, 405, , 409
ESP10, 359, 411, 434, 447, 463, 407, , 411
ESP10, 384, 403, 440, 459, 467, 409, , 413
ESP10, 385, 406, 445, 458, 467, 411, , 415
ESP10, 391, 408, 451, 459, 467, 413, , 417
ESP10, 393, 409, 451, 460, 468, 416, , 420
ESP10, 392, 408, 453, 459, 468, 418, , 422
ESP10, 385, 402, 448, 461, 471, 420, , 424
ESP10, 384, 409, 450, 463, 470, 422, , 426
ESP10, 394, 418, 454, 465, 472, 424, , 428
ESP10, 389, 418, 451, 464, 471, 426, , 430
ESP10, 391, 416, 451, 462, 472, 428, , 432
ESP10, 400, 421, 450, 465, 472, 430, , 434
ESP10, 401, 414, 454, 462, 471, 432, , 436
ESP10, 404, 445, 452, 464, 473, 434, , 438
ESP10, 399, 436, 449, 465, 475, 437, , 441
ESP10, 405, 446, 456, 467, 476, 439, , 443
ESP10, 396, 432, 450, 466, 477, 441, , 445
ESP10, 402, 435, 454, 467, 477, 443, , 447
ESP10, 409, 439, 455, 468, 477, 445, , 449
ESP10, 417, 436, 455, 470, 478, 447, , 451
ESP10, 412, 445, 466, 475, 482, 449, , 453
ESP10, 402, 439, 456, 471, 479, 451, , 455
ESP10, 418, 448, 465, 475, 483, 453, , 457
ESP10, 405, 445, 456, 469, 474, 455, , 459
ESP10, 408, 449, 461, 471, 479, 457, , 461
ESP10, 429, 449, 462, 470, 476, 460, , 464
ESP10, 432, 451, 465, 473, 481, 462, , 466
ESP10, 432, 450, 460, 471, 479, 464, , 468
ESP10, 431, 451, 466, 476, 483, 466, , 470
ESP10, 425, 452, 460, 471, 478, 468, , 472
ESP10, 435, 453, 467, 476, 481, 470, , 474
ESP10, 443, 455, 468, 475, 482, 472, , 476
ESP10, 425, 453, 463, 476, 481, 474, , 478
ESP10, 429, 461, 469, 476, 482, 476, , 480
ESP10, 440, 455, 464, 472, 477, 478, , 482
ESP10, 422, 450, 458, 469, 476, 480, , 484
ESP10, 438, 456, 462, 472, 480, 483, , 487
ESP10, 437, 454, 461, 468, 475, 485, , 489
ESP10, 425, 453, 460, 466, 473, 487, , 491
ESP10, 431, 455, 460, 470, 477, 489, , 493
ESP10, 430, 454, 461, 471, 477, 491, , 495
ESP10, 452, 461, 467, 476, 484, 493, , 497
ESP10, 450, 460, 466, 473, 480, 495, , 499
ESP10, 453, 462, 468, 475, 482, 497, , 501
ESP10, 458, 465, 470, 479, 485, 499, , 503
ESP10, 452, 462, 468, 475, 484, 501, , 505
ESP10, 452, 462, 468, 474, 482, 504, , 508
ESP10, 452, 460, 468, 478, 485, 506, , 510
ESP10, 451, 462, 472, 480, 486, 508, , 512
ESP10, 455, 469, 476, 484, 490, 510, , 514
ESP10, 459, 468, 478, 487, 492, 512, , 516
ESP10, 459, 471, 475, 485, 492, 514, , 518
ESP10, 457, 467, 475, 482, 487, 516, , 520
ESP10, 458, 471, 478, 486, 490, 518, , 522
ESP10, 461, 473, 479, 487, 492, 520, , 524
ESP10, 459, 471, 482, 490, 493, 522, , 526
ESP10, 459, 469, 476, 485, 489, 524, , 528
ESP10, 460, 471, 475, 484, 488, 527, , 531
ESP10, 452, 467, 474, 482, 486, 529, , 533
ESP10, 459, 469, 475, 483, 487, 531, , 535
ESP10, 456, 466, 473, 481, 484, 533, , 537
ESP10, 459, 470, 478, 486, 490, 535, , 539
ESP10, 460, 472, 480, 488, 492, 537, , 541
ESP10, 461, 468, 476, 487, 490, 539, , 543
ESP10, 458, 471, 479, 488, 490, 541, , 545
ESP10, 458, 471, 480, 489, 492, 543, , 547
ESP10, 462, 472, 481, 490, 493, 545, , 549
ESP10, 466, 472, 480, 488, 490, 547, , 551
ESP10, 466, 477, 485, 493, 495, 550, , 554
ESP10, 469, 479, 487, 495, 497, 552, , 556
ESP10, 469, 483, 490, 498, 500, 554, , 558
ESP10, 471, 483, 490, 497, 500, 556, , 560
ESP10, 470, 481, 489, 496, 499, 558, , 562
ESP10, 469, 481, 487, 495, 498, 560, , 564
ESP10, 472, 482, 492, 497, 498, 562, , 566
ESP10, 468, 481, 488, 496, 499, 564, , 568
ESP10, 471, 481, 488, 497, 500, 566, , 570
ESP10, 470, 476, 484, 490, 496, 568, , 572
ESP10, 468, 477, 483, 491, 496, 571, , 575
ESP10, 468, 477, 483, 493, 495, 573, , 577
ESP10, 471, 484, 492, 498, 500, 575, , 579
ESP10, 472, 485, 495, 499, 501, 577, , 581
ESP10, 470, 483, 491, 497, 499, 579, , 583
ESP10, 473, 487, 491, 499, 502, 581, , 585
ESP10, 474, 485, 492, 499, 501, 583, , 587
ESP10, 475, 487, 492, 500, 503, 585, , 589
ESP10, 475, 481, 489, 492, 500, 587, , 591
ESP10, 477, 485, 494, 501, 503, 589, , 593
ESP10, 476, 488, 493, 501, 504, 591, , 595
ESP10, 478, 491, 499, 502, 505, 594, , 598
ESP10, 477, 491, 498, 501, 504, 596, , 600
ESP10, 478, 491, 499, 502, 504, 598, , 602
ESP10, 477, 491, 498, 501, 504, 600, , 604
ESP10, 479, 492, 500, 503, 505, 602, , 606
ESP10, 480, 493, 501, 504, 506, 604, , 608
ESP10, 480, 491, 496, 501, 505, 606, , 610
ESP10, 481, 493, 498, 504, 507, 608, , 612
ESP10, 481, 492, 498, 503, 506, 610, , 614
ESP10, 482, 493, 497, 502, 506, 612, , 616
ESP10, 482, 488, 496, 499, 500, 614, , 618
ESP10, 483, 492, 498, 502, 506, 617, , 621
ESP10, 483, 489, 497, 500, 500, 619, , 623
ESP10, 483, 489, 495, 498, 500, 621, , 625
ESP10, 484, 490, 497, 500, 501, 623, , 627
ESP10, 485, 491, 497, 500, 502, 625, , 629
ESP10, 487, 492, 499, 502, 504, 627, , 631
ESP10, 487, 493, 499, 502, 504, 629, , 633
ESP10, 486, 492, 498, 501, 503, 631, , 635
ESP10, 485, 490, 497, 500, 501, 633, , 637
ESP10, 483, 489, 495, 498, 500, 635, , 639
ESP10, 485, 491, 497, 500, 502, 638, , 642
ESP10, 486, 491, 498, 501, 503, 640, , 644
ESP10, 490, 495, 502, 505, 506, 642, , 646
ESP10, 491, 497, 503, 506, 508, 644, , 648
ESP10, 491, 496, 504, 506, 508, 646, , 650
ESP10, 494, 498, 506, 508, 510, 648, , 652
ESP10, 495, 499, 507, 510, 512, 650, , 654
ESP10, 495, 500, 508, 510, 512, 652, , 656
ESP10, 496, 501, 508, 511, 513, 654, , 658
ESP10, 494, 498, 506, 509, 511, 656, , 660
ESP10, 496, 500, 508, 511, 513, 658, , 662
ESP10, 495, 499, 506, 509, 511, 661, , 665
ESP10, 495, 500, 507, 510, 512, 663, , 667
ESP10, 497, 502, 509, 512, 514, 665, , 669
ESP10, 496, 500, 508, 511, 513, 667, , 671
ESP10, 497, 501, 509, 512, 513, 669, , 673
ESP10, 498, 503, 510, 513, 514, 671, , 675
ESP10, 498, 502, 509, 512, 514, 673, , 677
ESP10, 499, 503, 511, 514, 515, 675, , 679
ESP10, 499, 504, 511, 514, 516, 677, , 681
ESP10, 499, 504, 511, 514, 516, 679, , 683
ESP10, 499, 504, 511, 514, 515, 681, , 685
ESP10, 498, 504, 510, 513, 515, 684, , 688
ESP10, 500, 505, 512, 515, 516, 686, , 690
ESP10, 499, 505, 512, 514, 515, 688, , 692
ESP10, 499, 505, 512, 514, 515, 690, , 694
ESP10, 499, 505, 512, 515, 515, 692, , 696
ESP10, 502, 508, 515, 517, 518, 694, , 698
ESP10, 502, 507, 514, 516, 517, 696, , 700
ESP10, 501, 507, 513, 516, 516, 698, , 702
ESP10, 502, 508, 514, 516, 517, 700, , 704
ESP10, 502, 508, 514, 516, 516, 702, , 706
ESP10, 504, 510, 516, 518, 518, 705, , 709
ESP10, 502, 508, 514, 516, 517, 707, , 711
ESP10, 504, 510, 516, 518, 518, 709, , 713
ESP10, 504, 510, 516, 518, 518, 711, , 715
ESP10, 503, 509, 515, 517, 517, 713, , 717
ESP10, 499, 505, 510, 512, 512, 715, , 719
ESP10, 499, 505, 510, 512, 512, 717, , 721
ESP10, 499, 505, 510, 512, 512, 719, , 723
ESP10, 499, 505, 510, 511, 511, 721, , 725
ESP10, 502, 508, 513, 515, 515, 723, , 727
ESP10, 501, 507, 512, 513, 514, 725, , 729
ESP10, 504, 510, 515, 516, 516, 728, , 732
ESP10, 502, 508, 512, 514, 514, 730, , 734
ESP10, 502, 508, 512, 514, 514, 732, , 736
ESP10, 504, 509, 514, 515, 515, 734, , 738
Max Scale
Scale To Data
Scale To Last 45 Days
Show Min/Max Ensemble Volume
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ESP10
HEFS
ESP0
Data Files
/chpsesp/ensemble/watersupply/SWAI1W_SQIN.ESPF10.csv
SWAI1W_SQIN.ESPF0.csv|2026-08-15
SWAI1W_SQIN.ESPF10.csv|2026-08-15
SWAI1W_SQIN.ESPFM.csv|2026-08-15
APR-SEP
SNAKE - BELOW SWAN FALLS
(
SWAI1
)
Forecasts for Water Year
2027
Official Water Supply
ESP with 10 Days QPF
Ensemble:
2026-08-15
Issued:
2026-08-15
Hide Forecast
Forecast
Period
Forecasts Are in KAF
30 Year
Average
(1991-2020)
90 %
50 %
%
Average
10 %
APR-SEP
2450
2742
84
5016
3258
APR-JUL
1592
1920
80
3998
2405
APR-AUG
2004
2313
82
4516
2812
JAN-SEP
3959
4631
92
7201
5020
JAN-JUL
3135
3798
91
6243
4166
OCT-SEP
5482
6274
95
9015
6584
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/SWAI1W_SQIN.ESPF10.csv
SWAI1W_SQIN.ESPF0.csv|2026-08-15
SWAI1W_SQIN.ESPF10.csv|2026-08-15
SWAI1W_SQIN.ESPFM.csv|2026-08-15
APR-SEP
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ESP10,ESPM,ESP0
ESP10,ESPM,ESP0
Last Forecast
