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SNAKE - AT HELLS CANYON DAM
(
HCDI1
)
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
4311
4329
64
4452
6725
APR-JUL
3175
3175
58
3175
5429
APR-AUG
3674
3677
61
3687
6046
JAN-SEP
6585
6603
65
6726
10130
JAN-JUL
5449
5449
62
5449
8834
OCT-SEP
8700
8717
70
8841
12500
Experimental Water Supply
HEFS with 15 days EQPF
Ensemble:
2026-08-15
Issued:
2026-08-15
Hide Forecast
APR-SEP
4310
4329
64
4453
6725
APR-JUL
3175
3175
58
3175
5429
APR-AUG
3673
3678
61
3687
6046
JAN-SEP
6584
6603
65
6727
10130
JAN-JUL
5449
5449
62
5449
8834
OCT-SEP
8699
8718
70
8842
12500
Reference
ESP with 0 Days QPF
Ensemble:
2026-08-15
Issued:
2026-08-15
Hide Forecast
APR-SEP
4311
4334
64
4458
6725
APR-JUL
3175
3175
58
3175
5429
APR-AUG
3671
3680
61
3692
6046
JAN-SEP
6584
6607
65
6732
10130
JAN-JUL
5449
5449
62
5449
8834
OCT-SEP
8699
8722
70
8846
12500
Move the mouse over the desired "Forecast Period" to display a graph.
ESP10, 203, 286, 426, 463, 483, 70, , 74
ESP10, 189, 282, 421, 465, 486, 72, , 76
ESP10, 189, 280, 426, 465, 490, 74, , 78
ESP10, 192, 283, 424, 460, 486, 76, , 80
ESP10, 202, 283, 430, 461, 491, 78, , 82
ESP10, 186, 280, 427, 460, 482, 81, , 85
ESP10, 196, 276, 428, 461, 482, 83, , 87
ESP10, 190, 276, 417, 460, 483, 85, , 89
ESP10, 186, 296, 422, 460, 480, 87, , 91
ESP10, 184, 286, 414, 459, 481, 89, , 93
ESP10, 171, 251, 407, 455, 481, 91, , 95
ESP10, 180, 260, 413, 452, 484, 93, , 97
ESP10, 194, 291, 416, 461, 486, 95, , 99
ESP10, 189, 291, 414, 456, 479, 97, , 101
ESP10, 182, 290, 409, 456, 475, 99, , 103
ESP10, 181, 275, 403, 443, 476, 102, , 106
ESP10, 179, 269, 394, 448, 476, 104, , 108
ESP10, 182, 273, 405, 449, 479, 106, , 110
ESP10, 174, 276, 400, 451, 475, 108, , 112
ESP10, 186, 276, 411, 455, 477, 110, , 114
ESP10, 174, 268, 396, 450, 475, 112, , 116
ESP10, 184, 268, 406, 456, 476, 114, , 118
ESP10, 200, 270, 406, 459, 475, 116, , 120
ESP10, 186, 280, 418, 465, 482, 118, , 122
ESP10, 208, 304, 423, 462, 483, 120, , 124
ESP10, 210, 280, 421, 461, 484, 122, , 126
ESP10, 207, 304, 418, 466, 486, 125, , 129
ESP10, 211, 314, 417, 467, 487, 127, , 131
ESP10, 209, 312, 415, 464, 485, 129, , 133
ESP10, 196, 274, 408, 453, 476, 131, , 135
ESP10, 196, 264, 407, 452, 474, 133, , 137
ESP10, 190, 292, 407, 454, 476, 135, , 139
ESP10, 217, 310, 413, 461, 479, 137, , 141
ESP10, 209, 288, 412, 462, 484, 139, , 143
ESP10, 213, 292, 415, 460, 487, 141, , 145
ESP10, 218, 300, 418, 465, 488, 143, , 147
ESP10, 216, 297, 414, 462, 488, 145, , 149
ESP10, 204, 294, 406, 460, 485, 148, , 152
ESP10, 200, 301, 407, 461, 487, 150, , 154
ESP10, 224, 344, 412, 463, 488, 152, , 156
ESP10, 235, 339, 421, 467, 493, 154, , 158
ESP10, 242, 340, 423, 467, 493, 156, , 160
ESP10, 233, 344, 420, 470, 493, 158, , 162
ESP10, 257, 342, 427, 470, 494, 160, , 164
ESP10, 263, 368, 433, 471, 495, 162, , 166
ESP10, 263, 366, 435, 473, 498, 164, , 168
ESP10, 268, 374, 435, 472, 500, 166, , 170
ESP10, 274, 372, 442, 472, 503, 169, , 173
ESP10, 270, 368, 436, 472, 500, 171, , 175
ESP10, 266, 373, 434, 472, 498, 173, , 177
ESP10, 265, 371, 437, 472, 497, 175, , 179
ESP10, 275, 367, 431, 475, 497, 177, , 181
ESP10, 293, 387, 439, 480, 502, 179, , 183
ESP10, 296, 389, 442, 481, 503, 181, , 185
ESP10, 294, 384, 440, 480, 504, 183, , 187
ESP10, 297, 389, 441, 480, 504, 185, , 189
ESP10, 282, 384, 441, 471, 502, 187, , 191
ESP10, 295, 391, 445, 476, 502, 189, , 193
ESP10, 305, 393, 448, 479, 506, 192, , 196
ESP10, 276, 372, 440, 476, 499, 194, , 198
ESP10, 283, 364, 415, 472, 486, 196, , 200
ESP10, 284, 366, 434, 475, 495, 198, , 202
ESP10, 284, 371, 424, 479, 493, 200, , 204
ESP10, 273, 359, 419, 472, 489, 202, , 206
ESP10, 270, 358, 419, 473, 489, 204, , 208
ESP10, 260, 357, 415, 467, 491, 206, , 210
ESP10, 242, 335, 421, 472, 487, 208, , 212
ESP10, 273, 371, 421, 474, 491, 210, , 214
ESP10, 280, 358, 429, 475, 492, 212, , 216
ESP10, 275, 366, 423, 467, 488, 215, , 219
ESP10, 284, 331, 419, 471, 486, 217, , 221
ESP10, 261, 319, 405, 465, 487, 219, , 223
ESP10, 243, 327, 403, 452, 484, 221, , 225
ESP10, 251, 324, 402, 454, 482, 223, , 227
ESP10, 256, 316, 408, 462, 484, 225, , 229
ESP10, 249, 307, 398, 449, 481, 227, , 231
ESP10, 236, 311, 386, 445, 478, 229, , 233
ESP10, 252, 319, 393, 448, 478, 231, , 235
ESP10, 248, 320, 391, 451, 477, 233, , 237
ESP10, 260, 318, 391, 450, 479, 236, , 240
ESP10, 259, 323, 402, 449, 478, 238, , 242
ESP10, 258, 325, 401, 444, 476, 240, , 244
ESP10, 264, 338, 404, 450, 479, 242, , 246
ESP10, 255, 337, 407, 449, 480, 244, , 248
ESP10, 253, 322, 391, 445, 476, 246, , 250
ESP10, 255, 329, 396, 452, 480, 248, , 252
ESP10, 258, 342, 403, 454, 481, 250, , 254
ESP10, 261, 338, 412, 458, 485, 252, , 256
ESP10, 260, 339, 412, 457, 481, 254, , 258
ESP10, 278, 343, 402, 455, 480, 256, , 260
ESP10, 261, 323, 394, 450, 476, 259, , 263
ESP10, 263, 330, 400, 442, 480, 261, , 265
ESP10, 264, 314, 393, 438, 477, 263, , 267
ESP10, 259, 333, 391, 435, 475, 265, , 269
ESP10, 254, 333, 378, 447, 476, 267, , 271
ESP10, 247, 334, 373, 450, 469, 269, , 273
ESP10, 260, 330, 392, 444, 470, 271, , 275
ESP10, 272, 331, 393, 445, 471, 273, , 277
ESP10, 275, 331, 402, 445, 471, 275, , 279
ESP10, 276, 338, 403, 445, 470, 277, , 281
ESP10, 277, 338, 402, 449, 473, 279, , 283
ESP10, 286, 338, 407, 447, 473, 282, , 286
ESP10, 309, 342, 403, 447, 473, 284, , 288
ESP10, 295, 340, 408, 447, 468, 286, , 290
ESP10, 306, 353, 408, 446, 475, 288, , 292
ESP10, 316, 348, 413, 446, 474, 290, , 294
ESP10, 297, 345, 409, 449, 468, 292, , 296
ESP10, 312, 374, 418, 447, 475, 294, , 298
ESP10, 312, 381, 418, 447, 475, 296, , 300
ESP10, 318, 385, 410, 451, 472, 298, , 302
ESP10, 312, 381, 414, 442, 481, 300, , 304
ESP10, 320, 380, 409, 453, 483, 303, , 307
ESP10, 322, 390, 414, 462, 481, 305, , 309
ESP10, 335, 392, 427, 461, 482, 307, , 311
ESP10, 363, 395, 428, 461, 485, 309, , 313
ESP10, 355, 396, 430, 464, 483, 311, , 315
ESP10, 357, 397, 431, 464, 482, 313, , 317
ESP10, 359, 400, 433, 464, 481, 315, , 319
ESP10, 357, 402, 431, 467, 483, 317, , 321
ESP10, 352, 401, 431, 468, 483, 319, , 323
ESP10, 360, 404, 434, 470, 483, 321, , 325
ESP10, 385, 400, 435, 468, 483, 323, , 327
ESP10, 366, 403, 433, 469, 482, 326, , 330
ESP10, 354, 390, 429, 455, 477, 328, , 332
ESP10, 356, 387, 430, 462, 478, 330, , 334
ESP10, 370, 394, 437, 470, 482, 332, , 336
ESP10, 374, 399, 432, 468, 482, 334, , 338
ESP10, 371, 398, 424, 465, 481, 336, , 340
ESP10, 370, 397, 424, 463, 479, 338, , 342
ESP10, 369, 393, 427, 457, 475, 340, , 344
ESP10, 371, 388, 422, 461, 468, 342, , 346
ESP10, 363, 382, 420, 448, 468, 344, , 348
ESP10, 369, 387, 424, 460, 473, 346, , 350
ESP10, 377, 393, 434, 460, 475, 349, , 353
ESP10, 393, 413, 436, 465, 478, 351, , 355
ESP10, 387, 408, 431, 464, 479, 353, , 357
ESP10, 385, 411, 428, 457, 477, 355, , 359
ESP10, 359, 386, 426, 455, 474, 357, , 361
ESP10, 348, 386, 422, 451, 471, 359, , 363
ESP10, 373, 412, 433, 457, 481, 361, , 365
ESP10, 375, 410, 431, 455, 478, 363, , 367
ESP10, 379, 411, 434, 460, 478, 365, , 369
ESP10, 384, 404, 443, 464, 482, 367, , 371
ESP10, 381, 407, 437, 466, 486, 370, , 374
ESP10, 381, 408, 433, 458, 484, 372, , 376
ESP10, 383, 418, 436, 468, 484, 374, , 378
ESP10, 386, 421, 441, 470, 483, 376, , 380
ESP10, 390, 420, 441, 465, 480, 378, , 382
ESP10, 383, 409, 447, 464, 478, 380, , 384
ESP10, 363, 400, 434, 464, 474, 382, , 386
ESP10, 391, 421, 441, 465, 478, 384, , 388
ESP10, 387, 418, 442, 469, 478, 386, , 390
ESP10, 385, 423, 447, 467, 480, 388, , 392
ESP10, 379, 420, 446, 466, 480, 390, , 394
ESP10, 402, 424, 444, 471, 480, 393, , 397
ESP10, 404, 427, 447, 466, 477, 395, , 399
ESP10, 404, 427, 444, 466, 475, 397, , 401
ESP10, 385, 416, 441, 463, 477, 399, , 403
ESP10, 412, 425, 444, 468, 478, 401, , 405
ESP10, 404, 427, 450, 471, 482, 403, , 407
ESP10, 414, 423, 451, 470, 480, 405, , 409
ESP10, 397, 417, 439, 465, 479, 407, , 411
ESP10, 417, 432, 448, 475, 486, 409, , 413
ESP10, 420, 435, 454, 478, 487, 411, , 415
ESP10, 419, 433, 458, 480, 486, 413, , 417
ESP10, 421, 435, 462, 480, 491, 416, , 420
ESP10, 415, 436, 458, 478, 487, 418, , 422
ESP10, 417, 429, 459, 479, 490, 420, , 424
ESP10, 428, 436, 466, 483, 491, 422, , 426
ESP10, 429, 450, 470, 484, 494, 424, , 428
ESP10, 428, 444, 469, 483, 492, 426, , 430
ESP10, 430, 446, 471, 485, 493, 428, , 432
ESP10, 430, 451, 473, 484, 493, 430, , 434
ESP10, 422, 444, 465, 477, 488, 432, , 436
ESP10, 432, 446, 469, 478, 483, 434, , 438
ESP10, 430, 444, 470, 478, 489, 437, , 441
ESP10, 424, 448, 469, 476, 488, 439, , 443
ESP10, 429, 448, 466, 477, 491, 441, , 445
ESP10, 430, 452, 471, 478, 492, 443, , 447
ESP10, 433, 454, 470, 478, 491, 445, , 449
ESP10, 432, 453, 471, 481, 491, 447, , 451
ESP10, 440, 458, 473, 484, 493, 449, , 453
ESP10, 434, 454, 472, 481, 490, 451, , 455
ESP10, 441, 454, 474, 483, 493, 453, , 457
ESP10, 437, 454, 470, 482, 486, 455, , 459
ESP10, 436, 456, 472, 482, 490, 457, , 461
ESP10, 434, 455, 472, 482, 487, 460, , 464
ESP10, 442, 458, 475, 486, 492, 462, , 466
ESP10, 436, 453, 470, 476, 488, 464, , 468
ESP10, 437, 450, 470, 478, 485, 466, , 470
ESP10, 442, 457, 475, 483, 488, 468, , 472
ESP10, 445, 454, 474, 481, 486, 470, , 474
ESP10, 442, 451, 469, 477, 480, 472, , 476
ESP10, 431, 443, 457, 467, 472, 474, , 478
ESP10, 432, 441, 460, 465, 469, 476, , 480
ESP10, 436, 448, 459, 466, 473, 478, , 482
ESP10, 431, 450, 462, 469, 476, 480, , 484
ESP10, 437, 450, 460, 467, 473, 483, , 487
ESP10, 438, 451, 461, 466, 472, 485, , 489
ESP10, 432, 449, 459, 464, 470, 487, , 491
ESP10, 434, 448, 459, 463, 470, 489, , 493
ESP10, 436, 447, 459, 464, 470, 491, , 495
ESP10, 438, 450, 459, 464, 469, 493, , 497
ESP10, 446, 454, 462, 466, 469, 495, , 499
ESP10, 443, 456, 463, 468, 473, 497, , 501
ESP10, 445, 457, 465, 468, 473, 499, , 503
ESP10, 445, 455, 463, 466, 470, 501, , 505
ESP10, 445, 454, 463, 467, 469, 504, , 508
ESP10, 447, 455, 464, 469, 475, 506, , 510
ESP10, 449, 456, 466, 470, 476, 508, , 512
ESP10, 448, 458, 468, 473, 478, 510, , 514
ESP10, 450, 460, 469, 474, 478, 512, , 516
ESP10, 452, 462, 470, 474, 479, 514, , 518
ESP10, 452, 461, 468, 473, 477, 516, , 520
ESP10, 453, 463, 469, 476, 479, 518, , 522
ESP10, 456, 464, 471, 477, 481, 520, , 524
ESP10, 456, 465, 470, 477, 480, 522, , 526
ESP10, 457, 463, 468, 474, 478, 524, , 528
ESP10, 456, 464, 469, 474, 477, 527, , 531
ESP10, 452, 461, 467, 472, 476, 529, , 533
ESP10, 455, 465, 467, 473, 476, 531, , 535
ESP10, 453, 462, 466, 472, 473, 533, , 537
ESP10, 457, 465, 470, 476, 477, 535, , 539
ESP10, 459, 467, 470, 477, 479, 537, , 541
ESP10, 458, 463, 467, 474, 477, 539, , 543
ESP10, 456, 464, 469, 474, 476, 541, , 545
ESP10, 457, 464, 470, 475, 477, 543, , 547
ESP10, 459, 465, 471, 476, 477, 545, , 549
ESP10, 460, 465, 470, 475, 476, 547, , 551
ESP10, 461, 467, 473, 477, 479, 550, , 554
ESP10, 462, 468, 474, 478, 479, 552, , 556
ESP10, 464, 470, 477, 481, 482, 554, , 558
ESP10, 465, 471, 476, 481, 482, 556, , 560
ESP10, 465, 470, 475, 480, 481, 558, , 562
ESP10, 464, 470, 474, 479, 480, 560, , 564
ESP10, 464, 469, 477, 479, 481, 562, , 566
ESP10, 463, 470, 475, 479, 481, 564, , 568
ESP10, 464, 469, 473, 478, 480, 566, , 570
ESP10, 463, 467, 472, 474, 478, 568, , 572
ESP10, 462, 467, 472, 475, 478, 571, , 575
ESP10, 462, 467, 472, 475, 477, 573, , 577
ESP10, 463, 471, 474, 478, 480, 575, , 579
ESP10, 468, 475, 479, 482, 484, 577, , 581
ESP10, 465, 472, 476, 480, 481, 579, , 583
ESP10, 466, 473, 477, 481, 482, 581, , 585
ESP10, 466, 474, 477, 481, 482, 583, , 587
ESP10, 467, 474, 477, 481, 483, 585, , 589
ESP10, 467, 472, 476, 478, 482, 587, , 591
ESP10, 468, 473, 478, 482, 483, 589, , 593
ESP10, 467, 475, 479, 481, 483, 591, , 595
ESP10, 468, 476, 480, 482, 483, 594, , 598
ESP10, 466, 474, 478, 480, 481, 596, , 600
ESP10, 466, 475, 478, 480, 482, 598, , 602
ESP10, 466, 474, 478, 480, 481, 600, , 604
ESP10, 467, 475, 479, 481, 482, 602, , 606
ESP10, 468, 476, 480, 482, 483, 604, , 608
ESP10, 468, 475, 478, 481, 482, 606, , 610
ESP10, 469, 476, 480, 482, 483, 608, , 612
ESP10, 469, 476, 480, 482, 483, 610, , 614
ESP10, 470, 476, 479, 482, 484, 612, , 616
ESP10, 470, 475, 479, 480, 481, 614, , 618
ESP10, 471, 476, 480, 481, 484, 617, , 621
ESP10, 470, 475, 479, 480, 481, 619, , 623
ESP10, 471, 474, 478, 479, 480, 621, , 625
ESP10, 472, 476, 480, 481, 482, 623, , 627
ESP10, 473, 476, 480, 481, 482, 625, , 629
ESP10, 474, 477, 481, 482, 483, 627, , 631
ESP10, 474, 477, 481, 482, 483, 629, , 633
ESP10, 471, 475, 479, 480, 481, 631, , 635
ESP10, 470, 474, 478, 479, 479, 633, , 637
ESP10, 470, 473, 477, 478, 479, 635, , 639
ESP10, 470, 474, 478, 479, 480, 638, , 642
ESP10, 471, 475, 479, 480, 481, 640, , 644
ESP10, 472, 475, 479, 480, 481, 642, , 646
ESP10, 473, 477, 481, 482, 482, 644, , 648
ESP10, 474, 476, 480, 482, 482, 646, , 650
ESP10, 475, 477, 482, 483, 483, 648, , 652
ESP10, 476, 478, 482, 483, 484, 650, , 654
ESP10, 477, 479, 483, 484, 485, 652, , 656
ESP10, 477, 479, 483, 485, 485, 654, , 658
ESP10, 476, 478, 482, 484, 485, 656, , 660
ESP10, 478, 480, 484, 485, 486, 658, , 662
ESP10, 477, 479, 483, 485, 485, 661, , 665
ESP10, 478, 480, 484, 486, 486, 663, , 667
ESP10, 478, 481, 485, 486, 487, 665, , 669
ESP10, 478, 480, 484, 485, 486, 667, , 671
ESP10, 479, 481, 485, 487, 487, 669, , 673
ESP10, 479, 481, 485, 487, 487, 671, , 675
ESP10, 478, 481, 485, 486, 487, 673, , 677
ESP10, 479, 482, 486, 487, 488, 675, , 679
ESP10, 479, 482, 486, 487, 488, 677, , 681
ESP10, 480, 482, 486, 487, 488, 679, , 683
ESP10, 479, 482, 486, 487, 488, 681, , 685
ESP10, 479, 482, 486, 487, 488, 684, , 688
ESP10, 480, 483, 486, 488, 488, 686, , 690
ESP10, 480, 482, 486, 487, 488, 688, , 692
ESP10, 481, 484, 487, 488, 489, 690, , 694
ESP10, 481, 484, 487, 488, 489, 692, , 696
ESP10, 482, 485, 489, 490, 491, 694, , 698
ESP10, 482, 485, 489, 490, 490, 696, , 700
ESP10, 482, 485, 489, 490, 490, 698, , 702
ESP10, 483, 486, 489, 490, 491, 700, , 704
ESP10, 483, 486, 489, 490, 490, 702, , 706
ESP10, 483, 486, 489, 490, 491, 705, , 709
ESP10, 483, 486, 489, 490, 490, 707, , 711
ESP10, 485, 488, 491, 492, 492, 709, , 713
ESP10, 485, 488, 491, 492, 492, 711, , 715
ESP10, 485, 488, 491, 491, 492, 713, , 717
ESP10, 482, 485, 488, 489, 489, 715, , 719
ESP10, 481, 484, 487, 488, 488, 717, , 721
ESP10, 482, 485, 488, 488, 489, 719, , 723
ESP10, 482, 485, 487, 488, 488, 721, , 725
ESP10, 483, 487, 489, 490, 490, 723, , 727
ESP10, 483, 487, 489, 490, 490, 725, , 729
ESP10, 485, 488, 491, 491, 491, 728, , 732
ESP10, 484, 487, 489, 490, 490, 730, , 734
ESP10, 485, 487, 490, 490, 490, 732, , 736
ESP10, 485, 488, 490, 491, 491, 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/HCDI1W_SQIN.ESPF10.csv
HCDI1W_SQIN.ESPF0.csv|2026-08-15
HCDI1W_SQIN.ESPF10.csv|2026-08-15
HCDI1W_SQIN.ESPFM.csv|2026-08-15
APR-SEP
SNAKE - AT HELLS CANYON DAM
(
HCDI1
)
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
4223
5406
80
9542
6725
APR-JUL
3101
4099
76
7980
5429
APR-AUG
3631
4740
78
8752
6046
JAN-SEP
6730
8617
85
14029
10130
JAN-JUL
5601
7227
82
12330
8834
OCT-SEP
9059
11341
91
17517
12500
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/HCDI1W_SQIN.ESPF10.csv
HCDI1W_SQIN.ESPF0.csv|2026-08-15
HCDI1W_SQIN.ESPF10.csv|2026-08-15
HCDI1W_SQIN.ESPFM.csv|2026-08-15
APR-SEP
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ESP10,ESPM,ESP0
ESP10,ESPM,ESP0
Last Forecast
