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Archive:
Water Year
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SNAKE - LOWER GRANITE DAM
(
LGDW1
)
Forecasts for Water Year
2026
Official Water Supply
ESP with 10 Days QPF
Ensemble:
2026-07-12
Issued:
2026-07-12
Hide Forecast
Forecast
Period
Forecasts Are in KAF
30 Year
Average
(1991-2020)
90 %
50 %
%
Average
10 %
APR-SEP
15893
15954
72
16149
22232
APR-JUL
13754
13758
69
13766
19946
APR-AUG
14806
14843
70
14930
21121
JAN-SEP
23395
23456
79
23650
29736
JAN-JUL
21255
21260
77
21268
27450
OCT-SEP
28631
28692
84
28887
34287
Experimental Water Supply
HEFS with 15 days EQPF
Ensemble:
2026-07-12
Issued:
2026-07-12
Hide Forecast
APR-SEP
15891
15958
72
16150
22232
APR-JUL
13749
13756
69
13770
19946
APR-AUG
14802
14845
70
14928
21121
JAN-SEP
23392
23459
79
23651
29736
JAN-JUL
21251
21257
77
21272
27450
OCT-SEP
28629
28696
84
28888
34287
Reference
ESP with 0 Days QPF
Ensemble:
2026-07-12
Issued:
2026-07-12
Hide Forecast
APR-SEP
15892
15962
72
16167
22232
APR-JUL
13749
13760
69
13781
19946
APR-AUG
14804
14853
70
14933
21121
JAN-SEP
23394
23463
79
23668
29736
JAN-JUL
21251
21262
77
21282
27450
OCT-SEP
28630
28700
84
28905
34287
Move the mouse over the desired "Forecast Period" to display a graph.
ESP10, 252, 324, 378, 416, 475, 70, , 74
ESP10, 247, 323, 385, 425, 475, 73, , 77
ESP10, 234, 311, 375, 414, 468, 75, , 79
ESP10, 233, 310, 377, 413, 469, 77, , 81
ESP10, 239, 314, 376, 416, 471, 80, , 84
ESP10, 233, 313, 377, 415, 469, 82, , 86
ESP10, 243, 317, 381, 417, 472, 84, , 88
ESP10, 239, 318, 380, 421, 475, 87, , 91
ESP10, 241, 318, 382, 421, 473, 89, , 93
ESP10, 229, 309, 378, 417, 469, 91, , 95
ESP10, 223, 303, 370, 412, 465, 94, , 98
ESP10, 230, 310, 382, 417, 470, 96, , 100
ESP10, 228, 308, 379, 416, 472, 98, , 102
ESP10, 228, 309, 378, 417, 471, 101, , 105
ESP10, 229, 304, 374, 415, 467, 103, , 107
ESP10, 213, 293, 364, 407, 458, 105, , 109
ESP10, 210, 286, 364, 407, 450, 108, , 112
ESP10, 212, 287, 366, 411, 453, 110, , 114
ESP10, 214, 292, 371, 416, 459, 113, , 117
ESP10, 219, 295, 375, 418, 460, 115, , 119
ESP10, 211, 285, 364, 410, 455, 117, , 121
ESP10, 218, 293, 374, 414, 461, 120, , 124
ESP10, 220, 294, 367, 413, 459, 122, , 126
ESP10, 228, 306, 374, 419, 466, 124, , 128
ESP10, 240, 313, 381, 424, 468, 127, , 131
ESP10, 236, 308, 375, 419, 468, 129, , 133
ESP10, 245, 307, 381, 419, 467, 131, , 135
ESP10, 249, 321, 382, 421, 470, 134, , 138
ESP10, 249, 314, 378, 419, 467, 136, , 140
ESP10, 229, 298, 363, 412, 459, 138, , 142
ESP10, 231, 295, 361, 411, 457, 141, , 145
ESP10, 238, 308, 361, 409, 458, 143, , 147
ESP10, 259, 318, 364, 413, 463, 145, , 149
ESP10, 247, 311, 367, 418, 469, 148, , 152
ESP10, 251, 316, 371, 421, 472, 150, , 154
ESP10, 253, 329, 369, 421, 472, 152, , 156
ESP10, 251, 332, 375, 419, 471, 155, , 159
ESP10, 244, 323, 365, 417, 467, 157, , 161
ESP10, 249, 325, 367, 418, 469, 159, , 163
ESP10, 245, 330, 372, 419, 469, 162, , 166
ESP10, 258, 344, 380, 426, 476, 164, , 168
ESP10, 256, 347, 384, 430, 479, 166, , 170
ESP10, 259, 347, 381, 431, 480, 169, , 173
ESP10, 269, 352, 386, 436, 484, 171, , 175
ESP10, 272, 351, 389, 439, 485, 173, , 177
ESP10, 275, 348, 391, 437, 488, 176, , 180
ESP10, 274, 357, 394, 438, 490, 178, , 182
ESP10, 283, 364, 401, 443, 496, 180, , 184
ESP10, 293, 363, 398, 445, 494, 183, , 187
ESP10, 293, 356, 396, 444, 493, 185, , 189
ESP10, 294, 353, 395, 441, 490, 187, , 191
ESP10, 291, 355, 389, 439, 486, 190, , 194
ESP10, 295, 368, 393, 441, 487, 192, , 196
ESP10, 302, 374, 398, 446, 490, 195, , 199
ESP10, 299, 370, 392, 443, 486, 197, , 201
ESP10, 301, 373, 397, 446, 488, 199, , 203
ESP10, 296, 354, 393, 434, 481, 202, , 206
ESP10, 294, 365, 397, 441, 481, 204, , 208
ESP10, 301, 367, 400, 446, 486, 206, , 210
ESP10, 296, 351, 390, 431, 476, 209, , 213
ESP10, 292, 337, 378, 428, 463, 211, , 215
ESP10, 299, 353, 387, 432, 470, 213, , 217
ESP10, 293, 344, 382, 430, 462, 216, , 220
ESP10, 277, 327, 370, 421, 453, 218, , 222
ESP10, 285, 332, 374, 424, 460, 220, , 224
ESP10, 266, 322, 363, 415, 451, 223, , 227
ESP10, 269, 325, 368, 417, 456, 225, , 229
ESP10, 288, 335, 379, 426, 463, 227, , 231
ESP10, 294, 340, 385, 433, 465, 230, , 234
ESP10, 286, 338, 377, 425, 459, 232, , 236
ESP10, 278, 325, 372, 424, 457, 234, , 238
ESP10, 271, 314, 364, 417, 450, 237, , 241
ESP10, 263, 298, 360, 415, 446, 239, , 243
ESP10, 260, 310, 360, 419, 450, 241, , 245
ESP10, 263, 312, 362, 420, 451, 244, , 248
ESP10, 260, 293, 358, 413, 446, 246, , 250
ESP10, 250, 291, 357, 405, 444, 248, , 252
ESP10, 264, 303, 365, 412, 449, 251, , 255
ESP10, 284, 313, 374, 426, 457, 253, , 257
ESP10, 294, 310, 366, 419, 453, 255, , 259
ESP10, 295, 317, 363, 423, 454, 258, , 262
ESP10, 296, 318, 370, 429, 456, 260, , 264
ESP10, 302, 325, 374, 427, 460, 262, , 266
ESP10, 302, 324, 373, 430, 462, 265, , 269
ESP10, 298, 315, 364, 426, 458, 267, , 271
ESP10, 297, 313, 368, 425, 460, 269, , 273
ESP10, 302, 317, 370, 426, 461, 272, , 276
ESP10, 304, 321, 377, 428, 465, 274, , 278
ESP10, 301, 328, 379, 427, 466, 276, , 280
ESP10, 312, 329, 377, 425, 463, 279, , 283
ESP10, 299, 328, 382, 423, 461, 281, , 285
ESP10, 297, 327, 381, 422, 460, 284, , 288
ESP10, 290, 322, 375, 417, 451, 286, , 290
ESP10, 290, 324, 372, 415, 454, 288, , 292
ESP10, 289, 322, 368, 417, 453, 291, , 295
ESP10, 287, 325, 362, 418, 450, 293, , 297
ESP10, 283, 321, 364, 416, 446, 295, , 299
ESP10, 290, 324, 365, 420, 446, 298, , 302
ESP10, 292, 324, 366, 420, 446, 300, , 304
ESP10, 295, 331, 367, 422, 447, 302, , 306
ESP10, 306, 327, 374, 422, 447, 305, , 309
ESP10, 312, 333, 372, 423, 450, 307, , 311
ESP10, 318, 334, 380, 423, 450, 309, , 313
ESP10, 319, 335, 373, 423, 449, 312, , 316
ESP10, 322, 342, 379, 424, 451, 314, , 318
ESP10, 323, 343, 377, 424, 448, 316, , 320
ESP10, 318, 342, 373, 423, 445, 319, , 323
ESP10, 324, 350, 381, 426, 447, 321, , 325
ESP10, 328, 351, 382, 425, 449, 323, , 327
ESP10, 332, 358, 383, 429, 450, 326, , 330
ESP10, 330, 356, 385, 428, 456, 328, , 332
ESP10, 337, 365, 395, 434, 461, 330, , 334
ESP10, 345, 369, 396, 435, 464, 333, , 337
ESP10, 348, 373, 402, 438, 466, 335, , 339
ESP10, 353, 376, 402, 439, 468, 337, , 341
ESP10, 347, 374, 405, 439, 468, 340, , 344
ESP10, 349, 375, 406, 440, 468, 342, , 346
ESP10, 351, 381, 408, 439, 467, 344, , 348
ESP10, 353, 383, 408, 441, 467, 347, , 351
ESP10, 358, 388, 412, 442, 468, 349, , 353
ESP10, 347, 380, 405, 437, 462, 351, , 355
ESP10, 356, 388, 413, 444, 467, 354, , 358
ESP10, 357, 388, 412, 444, 468, 356, , 360
ESP10, 353, 376, 410, 440, 463, 358, , 362
ESP10, 357, 377, 410, 443, 463, 361, , 365
ESP10, 359, 383, 414, 443, 470, 363, , 367
ESP10, 364, 387, 413, 445, 469, 366, , 370
ESP10, 367, 384, 416, 444, 468, 368, , 372
ESP10, 366, 385, 411, 440, 466, 370, , 374
ESP10, 365, 387, 412, 440, 460, 373, , 377
ESP10, 349, 379, 408, 433, 456, 375, , 379
ESP10, 350, 379, 409, 432, 458, 377, , 381
ESP10, 349, 383, 406, 434, 458, 380, , 384
ESP10, 359, 387, 414, 437, 462, 382, , 386
ESP10, 369, 388, 409, 439, 464, 384, , 388
ESP10, 365, 384, 406, 439, 462, 387, , 391
ESP10, 361, 381, 402, 433, 456, 389, , 393
ESP10, 352, 378, 401, 431, 459, 391, , 395
ESP10, 342, 374, 392, 426, 453, 394, , 398
ESP10, 354, 382, 405, 434, 462, 396, , 400
ESP10, 349, 378, 402, 432, 461, 398, , 402
ESP10, 355, 388, 412, 436, 465, 401, , 405
ESP10, 374, 387, 417, 441, 466, 403, , 407
ESP10, 373, 385, 419, 440, 468, 405, , 409
ESP10, 371, 391, 416, 442, 467, 408, , 412
ESP10, 371, 395, 416, 445, 470, 410, , 414
ESP10, 375, 395, 420, 445, 471, 412, , 416
ESP10, 366, 387, 415, 436, 462, 415, , 419
ESP10, 358, 379, 420, 433, 457, 417, , 421
ESP10, 347, 373, 408, 430, 453, 419, , 423
ESP10, 355, 390, 421, 437, 457, 422, , 426
ESP10, 353, 389, 421, 438, 455, 424, , 428
ESP10, 359, 384, 418, 437, 454, 426, , 430
ESP10, 356, 376, 412, 430, 446, 429, , 433
ESP10, 362, 382, 412, 434, 449, 431, , 435
ESP10, 354, 383, 412, 431, 445, 433, , 437
ESP10, 356, 384, 411, 432, 445, 436, , 440
ESP10, 350, 383, 407, 430, 445, 438, , 442
ESP10, 357, 382, 405, 429, 446, 440, , 444
ESP10, 367, 390, 413, 436, 449, 443, , 447
ESP10, 358, 382, 403, 431, 443, 445, , 449
ESP10, 343, 372, 392, 422, 436, 448, , 452
ESP10, 360, 391, 406, 437, 448, 450, , 454
ESP10, 367, 392, 410, 439, 453, 452, , 456
ESP10, 368, 396, 417, 440, 455, 455, , 459
ESP10, 367, 391, 414, 436, 452, 457, , 461
ESP10, 363, 386, 409, 432, 448, 459, , 463
ESP10, 365, 394, 414, 435, 451, 462, , 466
ESP10, 373, 399, 420, 441, 454, 464, , 468
ESP10, 380, 402, 426, 450, 457, 466, , 470
ESP10, 375, 405, 425, 449, 456, 469, , 473
ESP10, 379, 408, 426, 451, 456, 471, , 475
ESP10, 380, 405, 425, 450, 454, 473, , 477
ESP10, 366, 388, 415, 437, 443, 476, , 480
ESP10, 361, 382, 410, 426, 436, 478, , 482
ESP10, 363, 383, 413, 430, 440, 480, , 484
ESP10, 361, 378, 407, 425, 432, 483, , 487
ESP10, 362, 379, 408, 425, 435, 485, , 489
ESP10, 366, 382, 414, 428, 439, 487, , 491
ESP10, 367, 384, 413, 429, 438, 490, , 494
ESP10, 373, 387, 419, 434, 440, 492, , 496
ESP10, 373, 388, 423, 434, 443, 494, , 498
ESP10, 371, 386, 416, 431, 439, 497, , 501
ESP10, 378, 391, 424, 437, 444, 499, , 503
ESP10, 375, 392, 420, 434, 443, 501, , 505
ESP10, 374, 389, 419, 434, 444, 504, , 508
ESP10, 376, 386, 417, 434, 444, 506, , 510
ESP10, 378, 392, 423, 436, 445, 508, , 512
ESP10, 369, 381, 412, 427, 439, 511, , 515
ESP10, 363, 378, 408, 421, 431, 513, , 517
ESP10, 359, 377, 405, 418, 429, 515, , 519
ESP10, 358, 377, 404, 417, 430, 518, , 522
ESP10, 353, 370, 397, 408, 422, 520, , 524
ESP10, 362, 374, 404, 413, 425, 522, , 526
ESP10, 357, 375, 400, 409, 421, 525, , 529
ESP10, 374, 386, 412, 422, 432, 527, , 531
ESP10, 369, 380, 407, 420, 428, 530, , 534
ESP10, 380, 389, 416, 427, 434, 532, , 536
ESP10, 377, 389, 413, 426, 433, 534, , 538
ESP10, 377, 390, 411, 423, 431, 537, , 541
ESP10, 376, 392, 413, 422, 430, 539, , 543
ESP10, 376, 394, 414, 422, 430, 541, , 545
ESP10, 378, 399, 416, 424, 431, 544, , 548
ESP10, 386, 407, 422, 431, 437, 546, , 550
ESP10, 385, 408, 421, 430, 437, 548, , 552
ESP10, 387, 409, 423, 431, 437, 551, , 555
ESP10, 385, 409, 424, 430, 436, 553, , 557
ESP10, 386, 410, 427, 431, 436, 555, , 559
ESP10, 388, 412, 427, 432, 439, 558, , 562
ESP10, 387, 411, 427, 432, 438, 560, , 564
ESP10, 386, 412, 427, 432, 437, 562, , 566
ESP10, 393, 415, 427, 434, 439, 565, , 569
ESP10, 398, 416, 429, 435, 440, 567, , 571
ESP10, 398, 416, 429, 435, 440, 569, , 573
ESP10, 400, 417, 430, 437, 442, 572, , 576
ESP10, 404, 420, 430, 438, 442, 574, , 578
ESP10, 406, 420, 430, 438, 442, 576, , 580
ESP10, 407, 421, 432, 437, 443, 579, , 583
ESP10, 408, 419, 432, 437, 442, 581, , 585
ESP10, 410, 417, 432, 437, 441, 583, , 587
ESP10, 414, 420, 433, 439, 442, 586, , 590
ESP10, 411, 417, 430, 436, 439, 588, , 592
ESP10, 417, 421, 434, 440, 444, 590, , 594
ESP10, 420, 423, 437, 441, 446, 593, , 597
ESP10, 417, 424, 434, 439, 443, 595, , 599
ESP10, 420, 425, 436, 442, 445, 597, , 601
ESP10, 417, 423, 433, 438, 443, 600, , 604
ESP10, 417, 425, 433, 439, 442, 602, , 606
ESP10, 419, 426, 434, 439, 443, 604, , 608
ESP10, 421, 428, 435, 440, 443, 607, , 611
ESP10, 421, 428, 435, 438, 442, 609, , 613
ESP10, 421, 427, 435, 439, 442, 611, , 615
ESP10, 423, 430, 436, 439, 443, 614, , 618
ESP10, 421, 428, 434, 438, 441, 616, , 620
ESP10, 419, 427, 432, 436, 439, 619, , 623
ESP10, 420, 427, 433, 436, 438, 621, , 625
ESP10, 423, 428, 434, 436, 438, 623, , 627
ESP10, 424, 428, 433, 436, 437, 626, , 630
ESP10, 426, 430, 433, 436, 438, 628, , 632
ESP10, 428, 431, 433, 436, 438, 630, , 634
ESP10, 429, 432, 435, 437, 439, 633, , 637
ESP10, 428, 432, 435, 438, 439, 635, , 639
ESP10, 430, 434, 437, 439, 440, 637, , 641
ESP10, 429, 433, 436, 439, 439, 640, , 644
ESP10, 431, 433, 436, 439, 440, 642, , 646
ESP10, 429, 432, 435, 438, 438, 644, , 648
ESP10, 429, 432, 435, 438, 438, 647, , 651
ESP10, 430, 433, 435, 437, 438, 649, , 653
ESP10, 430, 434, 436, 438, 439, 651, , 655
ESP10, 431, 434, 436, 438, 439, 654, , 658
ESP10, 432, 436, 438, 439, 440, 656, , 660
ESP10, 431, 434, 436, 438, 438, 658, , 662
ESP10, 432, 435, 437, 438, 439, 661, , 665
ESP10, 432, 435, 437, 438, 439, 663, , 667
ESP10, 432, 435, 437, 438, 439, 665, , 669
ESP10, 432, 435, 437, 438, 439, 668, , 672
ESP10, 432, 435, 437, 438, 439, 670, , 674
ESP10, 432, 435, 437, 438, 439, 672, , 676
ESP10, 432, 435, 437, 438, 438, 675, , 679
ESP10, 432, 434, 436, 437, 438, 677, , 681
ESP10, 432, 434, 436, 437, 437, 679, , 683
ESP10, 432, 434, 436, 437, 438, 682, , 686
ESP10, 432, 434, 436, 436, 437, 684, , 688
ESP10, 432, 434, 435, 436, 436, 686, , 690
ESP10, 432, 434, 436, 436, 437, 689, , 693
ESP10, 432, 434, 436, 436, 437, 691, , 695
ESP10, 432, 434, 435, 436, 436, 693, , 697
ESP10, 431, 433, 435, 435, 436, 696, , 700
ESP10, 430, 432, 433, 434, 434, 698, , 702
ESP10, 426, 428, 429, 430, 430, 701, , 705
ESP10, 426, 428, 430, 430, 431, 703, , 707
ESP10, 427, 429, 430, 431, 431, 705, , 709
ESP10, 427, 429, 430, 431, 431, 708, , 712
ESP10, 427, 429, 430, 431, 431, 710, , 714
ESP10, 428, 429, 430, 431, 431, 712, , 716
ESP10, 428, 429, 431, 431, 432, 715, , 719
ESP10, 428, 429, 431, 431, 432, 717, , 721
ESP10, 429, 430, 431, 432, 432, 719, , 723
ESP10, 429, 430, 431, 432, 432, 722, , 726
ESP10, 429, 430, 431, 432, 432, 724, , 728
ESP10, 429, 430, 431, 432, 432, 726, , 730
ESP10, 429, 430, 432, 432, 433, 729, , 733
ESP10, 429, 430, 431, 432, 432, 731, , 735
ESP10, 429, 430, 432, 432, 433, 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/watersupply/LGDW1W_SQIN.ESPF10.csv
LGDW1W_SQIN.ESPF0.csv|2026-07-12
LGDW1W_SQIN.ESPF10.csv|2026-07-12
LGDW1W_SQIN.ESPFM.csv|2026-07-12
APR-SEP
SNAKE - LOWER GRANITE DAM
(
LGDW1
)
Forecasts for Water Year
2027
Official Water Supply
ESP with 10 Days QPF
Ensemble:
2026-07-12
Issued:
2026-07-12
Hide Forecast
Forecast
Period
Forecasts Are in KAF
30 Year
Average
(1991-2020)
90 %
50 %
%
Average
10 %
APR-SEP
13041
18791
85
29758
22232
APR-JUL
11262
16770
84
26806
19946
APR-AUG
12111
17769
84
28390
21121
JAN-SEP
18511
25985
87
38281
29736
JAN-JUL
16732
23987
87
35428
27450
OCT-SEP
23215
29680
87
43766
34287
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/LGDW1W_SQIN.ESPF10.csv
LGDW1W_SQIN.ESPF0.csv|2026-07-12
LGDW1W_SQIN.ESPF10.csv|2026-07-12
LGDW1W_SQIN.ESPFM.csv|2026-07-12
APR-SEP
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ESP10,ESPM,ESP0
ESP10,ESPM,ESP0
Last Forecast
