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Water Year
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SNAKE - JACKSON LAKE AT DAM
(
JLKW4
)
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
628
629
74
633
849
APR-JUL
565
565
73
565
771
APR-AUG
599
599
73
600
816
JAN-SEP
743
744
79
748
947
JAN-JUL
680
680
78
680
869
OCT-SEP
837
838
81
842
1039
Experimental Water Supply
HEFS with 15 days EQPF
Ensemble:
2026-08-15
Issued:
2026-08-15
Hide Forecast
APR-SEP
628
629
74
633
849
APR-JUL
565
565
73
565
771
APR-AUG
599
599
73
600
816
JAN-SEP
743
744
79
748
947
JAN-JUL
680
680
78
680
869
OCT-SEP
837
838
81
842
1039
Reference
ESP with 0 Days QPF
Ensemble:
2026-08-15
Issued:
2026-08-15
Hide Forecast
APR-SEP
628
629
74
635
849
APR-JUL
565
565
73
565
771
APR-AUG
599
599
73
601
816
JAN-SEP
743
745
79
750
947
JAN-JUL
680
680
78
680
869
OCT-SEP
837
839
81
844
1039
Move the mouse over the desired "Forecast Period" to display a graph.
ESP10, 269, 346, 412, 446, 478, 70, , 74
ESP10, 266, 343, 410, 443, 475, 72, , 76
ESP10, 268, 344, 412, 444, 478, 74, , 78
ESP10, 265, 340, 409, 440, 475, 76, , 80
ESP10, 268, 340, 408, 440, 475, 78, , 82
ESP10, 268, 338, 407, 444, 474, 81, , 85
ESP10, 269, 336, 405, 441, 472, 83, , 87
ESP10, 269, 332, 402, 438, 470, 85, , 89
ESP10, 265, 330, 398, 434, 467, 87, , 91
ESP10, 256, 321, 390, 426, 460, 89, , 93
ESP10, 244, 308, 378, 415, 450, 91, , 95
ESP10, 243, 306, 380, 414, 451, 93, , 97
ESP10, 253, 316, 390, 423, 462, 95, , 99
ESP10, 250, 312, 388, 420, 461, 97, , 101
ESP10, 251, 312, 389, 421, 462, 99, , 103
ESP10, 247, 306, 384, 416, 456, 102, , 106
ESP10, 240, 301, 377, 410, 452, 104, , 108
ESP10, 241, 298, 377, 408, 450, 106, , 110
ESP10, 248, 307, 384, 414, 458, 108, , 112
ESP10, 256, 309, 384, 414, 459, 110, , 114
ESP10, 252, 305, 382, 410, 454, 112, , 116
ESP10, 259, 314, 388, 416, 460, 114, , 118
ESP10, 256, 314, 387, 418, 458, 116, , 120
ESP10, 259, 320, 390, 425, 461, 118, , 122
ESP10, 262, 325, 397, 428, 464, 120, , 124
ESP10, 259, 321, 394, 427, 463, 122, , 126
ESP10, 263, 330, 401, 432, 466, 125, , 129
ESP10, 266, 331, 401, 433, 466, 127, , 131
ESP10, 267, 333, 402, 434, 466, 129, , 133
ESP10, 252, 318, 388, 421, 453, 131, , 135
ESP10, 252, 320, 389, 422, 453, 133, , 137
ESP10, 265, 331, 395, 426, 457, 135, , 139
ESP10, 273, 340, 398, 430, 462, 137, , 141
ESP10, 270, 336, 395, 429, 465, 139, , 143
ESP10, 270, 336, 396, 431, 465, 141, , 145
ESP10, 270, 337, 400, 432, 469, 143, , 147
ESP10, 270, 335, 402, 430, 468, 145, , 149
ESP10, 264, 331, 397, 425, 462, 148, , 152
ESP10, 261, 330, 395, 427, 460, 150, , 154
ESP10, 266, 338, 401, 431, 464, 152, , 156
ESP10, 271, 343, 405, 436, 468, 154, , 158
ESP10, 268, 338, 401, 434, 464, 156, , 160
ESP10, 274, 340, 407, 436, 467, 158, , 162
ESP10, 277, 342, 409, 437, 468, 160, , 164
ESP10, 277, 342, 409, 438, 468, 162, , 166
ESP10, 279, 339, 405, 436, 464, 164, , 168
ESP10, 289, 348, 411, 441, 473, 166, , 170
ESP10, 294, 353, 416, 447, 480, 169, , 173
ESP10, 299, 355, 415, 450, 479, 171, , 175
ESP10, 296, 353, 411, 447, 477, 173, , 177
ESP10, 299, 354, 412, 450, 477, 175, , 179
ESP10, 305, 355, 413, 450, 476, 177, , 181
ESP10, 310, 364, 414, 451, 477, 179, , 183
ESP10, 313, 367, 416, 452, 479, 181, , 185
ESP10, 317, 375, 418, 453, 483, 183, , 187
ESP10, 320, 376, 421, 455, 484, 185, , 189
ESP10, 314, 369, 420, 451, 481, 187, , 191
ESP10, 319, 374, 427, 454, 484, 189, , 193
ESP10, 323, 383, 429, 456, 487, 192, , 196
ESP10, 315, 373, 421, 447, 480, 194, , 198
ESP10, 304, 355, 407, 437, 466, 196, , 200
ESP10, 315, 367, 415, 446, 475, 198, , 202
ESP10, 309, 360, 409, 442, 469, 200, , 204
ESP10, 301, 351, 403, 437, 464, 202, , 206
ESP10, 304, 352, 403, 437, 469, 204, , 208
ESP10, 297, 343, 392, 427, 460, 206, , 210
ESP10, 295, 342, 392, 427, 459, 208, , 212
ESP10, 297, 343, 393, 428, 464, 210, , 214
ESP10, 304, 351, 397, 433, 468, 212, , 216
ESP10, 298, 346, 392, 429, 464, 215, , 219
ESP10, 287, 335, 382, 420, 454, 217, , 221
ESP10, 282, 329, 375, 416, 448, 219, , 223
ESP10, 273, 320, 370, 410, 442, 221, , 225
ESP10, 274, 320, 371, 412, 443, 223, , 227
ESP10, 274, 322, 372, 414, 444, 225, , 229
ESP10, 267, 313, 364, 405, 437, 227, , 231
ESP10, 262, 306, 358, 399, 432, 229, , 233
ESP10, 268, 304, 359, 398, 431, 231, , 235
ESP10, 249, 287, 344, 385, 418, 233, , 237
ESP10, 249, 291, 348, 388, 418, 236, , 240
ESP10, 251, 292, 350, 392, 419, 238, , 242
ESP10, 245, 285, 343, 389, 414, 240, , 244
ESP10, 251, 280, 335, 388, 410, 242, , 246
ESP10, 249, 281, 333, 387, 411, 244, , 248
ESP10, 241, 273, 326, 381, 405, 246, , 250
ESP10, 248, 275, 330, 385, 409, 248, , 252
ESP10, 253, 276, 331, 386, 411, 250, , 254
ESP10, 261, 283, 338, 392, 416, 252, , 256
ESP10, 259, 281, 334, 390, 413, 254, , 258
ESP10, 259, 284, 334, 390, 412, 256, , 260
ESP10, 267, 295, 340, 395, 417, 259, , 263
ESP10, 228, 260, 305, 360, 383, 261, , 265
ESP10, 228, 269, 308, 359, 382, 263, , 267
ESP10, 180, 224, 264, 320, 345, 265, , 269
ESP10, 173, 220, 259, 314, 343, 267, , 271
ESP10, 173, 217, 256, 311, 341, 269, , 273
ESP10, 177, 220, 260, 317, 344, 271, , 275
ESP10, 190, 224, 267, 322, 347, 273, , 277
ESP10, 196, 226, 272, 324, 351, 275, , 279
ESP10, 198, 226, 273, 322, 350, 277, , 281
ESP10, 200, 231, 274, 323, 350, 279, , 283
ESP10, 202, 233, 276, 323, 350, 282, , 286
ESP10, 206, 236, 277, 323, 350, 284, , 288
ESP10, 213, 235, 276, 320, 349, 286, , 290
ESP10, 226, 246, 289, 331, 359, 288, , 292
ESP10, 227, 245, 290, 331, 358, 290, , 294
ESP10, 227, 242, 287, 326, 355, 292, , 296
ESP10, 234, 251, 292, 329, 358, 294, , 298
ESP10, 233, 255, 293, 329, 359, 296, , 300
ESP10, 239, 264, 299, 335, 369, 298, , 302
ESP10, 240, 260, 296, 340, 366, 300, , 304
ESP10, 242, 264, 298, 344, 370, 303, , 307
ESP10, 244, 268, 299, 346, 373, 305, , 309
ESP10, 247, 271, 300, 347, 374, 307, , 311
ESP10, 246, 274, 302, 349, 375, 309, , 313
ESP10, 253, 282, 309, 355, 381, 311, , 315
ESP10, 254, 287, 310, 357, 381, 313, , 317
ESP10, 257, 286, 309, 356, 381, 315, , 319
ESP10, 264, 289, 308, 356, 380, 317, , 321
ESP10, 266, 295, 312, 359, 383, 319, , 323
ESP10, 266, 295, 314, 362, 382, 321, , 325
ESP10, 263, 294, 315, 360, 380, 323, , 327
ESP10, 265, 296, 318, 362, 384, 326, , 330
ESP10, 253, 286, 309, 353, 373, 328, , 332
ESP10, 256, 290, 315, 356, 374, 330, , 334
ESP10, 287, 319, 343, 381, 398, 332, , 336
ESP10, 284, 315, 345, 375, 393, 334, , 338
ESP10, 290, 318, 347, 377, 393, 336, , 340
ESP10, 293, 318, 351, 378, 392, 338, , 342
ESP10, 299, 314, 347, 373, 389, 340, , 344
ESP10, 293, 310, 342, 367, 383, 342, , 346
ESP10, 291, 305, 337, 365, 378, 344, , 348
ESP10, 295, 312, 343, 370, 381, 346, , 350
ESP10, 298, 315, 344, 372, 382, 349, , 353
ESP10, 309, 324, 355, 380, 394, 351, , 355
ESP10, 312, 324, 356, 383, 397, 353, , 357
ESP10, 310, 321, 353, 379, 397, 355, , 359
ESP10, 304, 314, 349, 377, 394, 357, , 361
ESP10, 296, 308, 344, 370, 391, 359, , 363
ESP10, 302, 314, 351, 375, 399, 361, , 365
ESP10, 299, 311, 352, 372, 399, 363, , 367
ESP10, 294, 308, 348, 368, 394, 365, , 369
ESP10, 306, 324, 361, 382, 405, 367, , 371
ESP10, 302, 323, 356, 378, 401, 370, , 374
ESP10, 301, 325, 356, 376, 399, 372, , 376
ESP10, 297, 324, 353, 373, 398, 374, , 378
ESP10, 296, 324, 353, 376, 400, 376, , 380
ESP10, 296, 323, 354, 375, 399, 378, , 382
ESP10, 289, 317, 347, 370, 392, 380, , 384
ESP10, 281, 307, 338, 363, 382, 382, , 386
ESP10, 288, 315, 347, 370, 389, 384, , 388
ESP10, 289, 321, 348, 371, 390, 386, , 390
ESP10, 294, 327, 358, 376, 394, 388, , 392
ESP10, 291, 324, 356, 374, 391, 390, , 394
ESP10, 297, 328, 360, 377, 393, 393, , 397
ESP10, 293, 326, 354, 372, 387, 395, , 399
ESP10, 294, 327, 354, 374, 387, 397, , 401
ESP10, 293, 324, 351, 370, 383, 399, , 403
ESP10, 295, 330, 353, 373, 384, 401, , 405
ESP10, 304, 337, 365, 380, 390, 403, , 407
ESP10, 299, 330, 357, 373, 386, 405, , 409
ESP10, 295, 327, 354, 369, 384, 407, , 411
ESP10, 307, 337, 365, 379, 397, 409, , 413
ESP10, 313, 342, 370, 385, 402, 411, , 415
ESP10, 317, 349, 375, 388, 404, 413, , 417
ESP10, 315, 353, 374, 389, 402, 416, , 420
ESP10, 313, 349, 372, 389, 401, 418, , 422
ESP10, 318, 353, 376, 393, 405, 420, , 424
ESP10, 324, 357, 382, 399, 411, 422, , 426
ESP10, 330, 358, 385, 402, 412, 424, , 428
ESP10, 332, 357, 385, 403, 412, 426, , 430
ESP10, 335, 357, 384, 403, 413, 428, , 432
ESP10, 342, 357, 383, 403, 413, 430, , 434
ESP10, 336, 351, 377, 396, 406, 432, , 436
ESP10, 333, 348, 375, 392, 404, 434, , 438
ESP10, 330, 346, 372, 390, 402, 437, , 441
ESP10, 333, 352, 374, 392, 404, 439, , 443
ESP10, 332, 358, 374, 392, 406, 441, , 445
ESP10, 333, 360, 377, 392, 407, 443, , 447
ESP10, 333, 359, 376, 395, 407, 445, , 449
ESP10, 335, 362, 379, 396, 408, 447, , 451
ESP10, 328, 356, 373, 390, 402, 449, , 453
ESP10, 322, 353, 370, 386, 397, 451, , 455
ESP10, 328, 357, 378, 392, 402, 453, , 457
ESP10, 323, 349, 371, 385, 395, 455, , 459
ESP10, 328, 355, 374, 390, 402, 457, , 461
ESP10, 331, 360, 378, 394, 405, 460, , 464
ESP10, 329, 355, 373, 392, 400, 462, , 466
ESP10, 333, 355, 372, 395, 400, 464, , 468
ESP10, 337, 355, 376, 396, 400, 466, , 470
ESP10, 329, 349, 369, 388, 393, 468, , 472
ESP10, 334, 355, 373, 390, 395, 470, , 474
ESP10, 331, 351, 370, 387, 393, 472, , 476
ESP10, 337, 356, 374, 391, 398, 474, , 478
ESP10, 331, 351, 369, 385, 394, 476, , 480
ESP10, 343, 362, 380, 394, 405, 478, , 482
ESP10, 347, 364, 384, 397, 408, 480, , 484
ESP10, 350, 365, 387, 400, 410, 483, , 487
ESP10, 352, 365, 387, 402, 411, 485, , 489
ESP10, 355, 369, 392, 403, 413, 487, , 491
ESP10, 349, 363, 389, 397, 406, 489, , 493
ESP10, 353, 369, 391, 399, 412, 491, , 495
ESP10, 352, 367, 389, 398, 410, 493, , 497
ESP10, 361, 375, 397, 406, 417, 495, , 499
ESP10, 358, 372, 394, 401, 412, 497, , 501
ESP10, 357, 372, 391, 400, 410, 499, , 503
ESP10, 357, 371, 391, 401, 410, 501, , 505
ESP10, 356, 369, 388, 398, 408, 504, , 508
ESP10, 366, 378, 396, 406, 415, 506, , 510
ESP10, 374, 387, 405, 414, 422, 508, , 512
ESP10, 377, 390, 409, 419, 425, 510, , 514
ESP10, 377, 393, 410, 421, 427, 512, , 516
ESP10, 378, 394, 410, 422, 427, 514, , 518
ESP10, 380, 394, 411, 423, 427, 516, , 520
ESP10, 383, 396, 413, 425, 429, 518, , 522
ESP10, 388, 396, 413, 425, 430, 520, , 524
ESP10, 390, 399, 417, 426, 430, 522, , 526
ESP10, 387, 396, 414, 422, 426, 524, , 528
ESP10, 390, 398, 416, 424, 429, 527, , 531
ESP10, 391, 400, 417, 426, 432, 529, , 533
ESP10, 392, 400, 418, 426, 432, 531, , 535
ESP10, 393, 398, 415, 423, 429, 533, , 537
ESP10, 395, 400, 415, 424, 430, 535, , 539
ESP10, 404, 409, 426, 434, 439, 537, , 541
ESP10, 399, 407, 423, 428, 433, 539, , 543
ESP10, 403, 411, 425, 433, 436, 541, , 545
ESP10, 404, 413, 426, 434, 438, 543, , 547
ESP10, 407, 416, 430, 436, 439, 545, , 549
ESP10, 405, 414, 430, 435, 439, 547, , 551
ESP10, 404, 412, 428, 432, 435, 550, , 554
ESP10, 407, 417, 432, 435, 440, 552, , 556
ESP10, 408, 418, 430, 434, 438, 554, , 558
ESP10, 405, 415, 428, 431, 435, 556, , 560
ESP10, 404, 414, 426, 430, 433, 558, , 562
ESP10, 408, 417, 428, 433, 435, 560, , 564
ESP10, 418, 426, 436, 440, 441, 562, , 566
ESP10, 413, 420, 430, 435, 437, 564, , 568
ESP10, 409, 417, 425, 430, 432, 566, , 570
ESP10, 410, 415, 423, 426, 428, 568, , 572
ESP10, 411, 418, 425, 427, 428, 571, , 575
ESP10, 414, 421, 427, 429, 430, 573, , 577
ESP10, 415, 423, 428, 430, 431, 575, , 579
ESP10, 413, 423, 427, 429, 429, 577, , 581
ESP10, 412, 423, 427, 428, 428, 579, , 583
ESP10, 412, 424, 425, 426, 427, 581, , 585
ESP10, 410, 421, 423, 424, 424, 583, , 587
ESP10, 412, 422, 424, 424, 425, 585, , 589
ESP10, 408, 415, 417, 418, 419, 587, , 591
ESP10, 416, 420, 422, 422, 423, 589, , 593
ESP10, 421, 422, 424, 425, 425, 591, , 595
ESP10, 420, 422, 423, 424, 424, 594, , 598
ESP10, 419, 421, 422, 423, 423, 596, , 600
ESP10, 421, 423, 424, 424, 425, 598, , 602
ESP10, 421, 423, 424, 424, 425, 600, , 604
ESP10, 421, 423, 424, 425, 425, 602, , 606
ESP10, 421, 423, 424, 424, 425, 604, , 608
ESP10, 421, 422, 423, 424, 424, 606, , 610
ESP10, 421, 423, 423, 424, 424, 608, , 612
ESP10, 420, 422, 422, 423, 423, 610, , 614
ESP10, 419, 420, 421, 421, 422, 612, , 616
ESP10, 412, 414, 415, 415, 416, 614, , 618
ESP10, 412, 414, 414, 415, 415, 617, , 621
ESP10, 411, 413, 414, 414, 415, 619, , 623
ESP10, 411, 412, 413, 413, 414, 621, , 625
ESP10, 410, 411, 412, 413, 413, 623, , 627
ESP10, 410, 411, 412, 412, 413, 625, , 629
ESP10, 410, 411, 412, 412, 412, 627, , 631
ESP10, 409, 410, 411, 412, 412, 629, , 633
ESP10, 409, 410, 411, 411, 411, 631, , 635
ESP10, 407, 408, 409, 409, 410, 633, , 637
ESP10, 404, 405, 406, 406, 406, 635, , 639
ESP10, 402, 403, 404, 404, 405, 638, , 642
ESP10, 402, 403, 404, 404, 405, 640, , 644
ESP10, 403, 404, 405, 405, 405, 642, , 646
ESP10, 403, 404, 405, 405, 405, 644, , 648
ESP10, 402, 402, 403, 404, 404, 646, , 650
ESP10, 401, 402, 403, 404, 404, 648, , 652
ESP10, 402, 402, 403, 404, 404, 650, , 654
ESP10, 401, 402, 403, 403, 404, 652, , 656
ESP10, 401, 402, 403, 403, 404, 654, , 658
ESP10, 401, 402, 403, 403, 403, 656, , 660
ESP10, 401, 402, 403, 403, 403, 658, , 662
ESP10, 401, 401, 402, 403, 403, 661, , 665
ESP10, 400, 401, 402, 402, 402, 663, , 667
ESP10, 400, 401, 402, 402, 403, 665, , 669
ESP10, 400, 400, 401, 402, 402, 667, , 671
ESP10, 399, 400, 401, 402, 402, 669, , 673
ESP10, 399, 400, 401, 401, 401, 671, , 675
ESP10, 399, 399, 400, 401, 401, 673, , 677
ESP10, 398, 399, 400, 401, 401, 675, , 679
ESP10, 398, 399, 400, 401, 401, 677, , 681
ESP10, 399, 399, 400, 401, 401, 679, , 683
ESP10, 399, 399, 400, 401, 401, 681, , 685
ESP10, 399, 399, 400, 401, 401, 684, , 688
ESP10, 399, 399, 400, 400, 401, 686, , 690
ESP10, 399, 399, 400, 400, 401, 688, , 692
ESP10, 399, 399, 400, 400, 401, 690, , 694
ESP10, 399, 399, 400, 400, 400, 692, , 696
ESP10, 398, 399, 400, 400, 400, 694, , 698
ESP10, 397, 397, 398, 399, 399, 696, , 700
ESP10, 397, 398, 398, 399, 399, 698, , 702
ESP10, 397, 398, 398, 399, 399, 700, , 704
ESP10, 397, 398, 398, 399, 399, 702, , 706
ESP10, 397, 398, 399, 399, 399, 705, , 709
ESP10, 397, 398, 398, 399, 399, 707, , 711
ESP10, 397, 398, 399, 399, 399, 709, , 713
ESP10, 397, 398, 399, 399, 399, 711, , 715
ESP10, 397, 398, 399, 399, 399, 713, , 717
ESP10, 397, 398, 399, 399, 399, 715, , 719
ESP10, 398, 399, 399, 399, 400, 717, , 721
ESP10, 397, 398, 399, 399, 399, 719, , 723
ESP10, 397, 398, 399, 399, 399, 721, , 725
ESP10, 398, 399, 399, 399, 400, 723, , 727
ESP10, 398, 399, 400, 400, 400, 725, , 729
ESP10, 399, 400, 400, 400, 400, 728, , 732
ESP10, 399, 400, 400, 400, 401, 730, , 734
ESP10, 399, 400, 400, 401, 401, 732, , 736
ESP10, 399, 400, 400, 400, 400, 734, , 738
Max Scale
Scale To Data
Scale To Last 45 Days
Show Min/Max Ensemble Volume
Show Tooltips Help
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ESP10
HEFS
ESP0
Data Files
/chpsesp/ensemble/watersupply/JLKW4W_SQIN.ESPF10.csv
JLKW4W_SQIN.ESPF0.csv|2026-08-15
JLKW4W_SQIN.ESPF10.csv|2026-08-15
JLKW4W_SQIN.ESPFM.csv|2026-08-15
APR-SEP
SNAKE - JACKSON LAKE AT DAM
(
JLKW4
)
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
511
706
83
1159
849
APR-JUL
450
623
81
1042
771
APR-AUG
483
671
82
1118
816
JAN-SEP
590
782
83
1235
947
JAN-JUL
530
707
81
1116
869
OCT-SEP
673
869
84
1323
1039
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/JLKW4W_SQIN.ESPF10.csv
JLKW4W_SQIN.ESPF0.csv|2026-08-15
JLKW4W_SQIN.ESPF10.csv|2026-08-15
JLKW4W_SQIN.ESPFM.csv|2026-08-15
APR-SEP
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ESP10,ESPM,ESP0
ESP10,ESPM,ESP0
Last Forecast
