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Water Year
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STEHEKIN - AT STEHEKIN
(
STHW1
)
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
593
594
73
598
814
APR-JUL
551
551
78
551
710
APR-AUG
578
578
74
579
778
JAN-SEP
817
818
90
822
913
JAN-JUL
775
775
96
775
809
OCT-SEP
1097
1098
105
1102
1046
Experimental Water Supply
HEFS with 15 days EQPF
Ensemble:
2026-08-15
Issued:
2026-08-15
Hide Forecast
APR-SEP
593
594
73
599
814
APR-JUL
551
551
78
551
710
APR-AUG
578
578
74
579
778
JAN-SEP
817
818
90
823
913
JAN-JUL
775
775
96
775
809
OCT-SEP
1097
1098
105
1103
1046
Reference
ESP with 0 Days QPF
Ensemble:
2026-08-15
Issued:
2026-08-15
Hide Forecast
APR-SEP
593
594
73
598
814
APR-JUL
551
551
78
551
710
APR-AUG
578
579
74
580
778
JAN-SEP
817
818
90
822
913
JAN-JUL
775
775
96
775
809
OCT-SEP
1097
1098
105
1102
1046
Move the mouse over the desired "Forecast Period" to display a graph.
ESP10, 247, 331, 381, 426, 459, 70, , 74
ESP10, 248, 331, 380, 424, 459, 72, , 76
ESP10, 249, 333, 381, 426, 459, 74, , 78
ESP10, 252, 333, 381, 425, 459, 76, , 80
ESP10, 256, 336, 383, 429, 461, 78, , 82
ESP10, 256, 338, 383, 429, 461, 81, , 85
ESP10, 258, 337, 382, 428, 461, 83, , 87
ESP10, 259, 339, 385, 429, 462, 85, , 89
ESP10, 259, 338, 386, 428, 462, 87, , 91
ESP10, 257, 334, 381, 423, 458, 89, , 93
ESP10, 259, 337, 384, 426, 460, 91, , 95
ESP10, 259, 339, 382, 428, 462, 93, , 97
ESP10, 260, 339, 382, 429, 465, 95, , 99
ESP10, 260, 340, 380, 429, 464, 97, , 101
ESP10, 257, 338, 378, 427, 463, 99, , 103
ESP10, 247, 328, 370, 418, 455, 102, , 106
ESP10, 243, 323, 365, 414, 450, 104, , 108
ESP10, 241, 324, 363, 411, 451, 106, , 110
ESP10, 247, 329, 368, 416, 457, 108, , 112
ESP10, 247, 327, 365, 414, 456, 110, , 114
ESP10, 241, 319, 359, 408, 452, 112, , 116
ESP10, 246, 324, 362, 414, 459, 114, , 118
ESP10, 234, 315, 353, 403, 450, 116, , 120
ESP10, 241, 320, 361, 410, 455, 118, , 122
ESP10, 243, 323, 363, 414, 456, 120, , 124
ESP10, 237, 320, 359, 410, 452, 122, , 126
ESP10, 237, 319, 362, 408, 452, 125, , 129
ESP10, 242, 323, 367, 411, 455, 127, , 131
ESP10, 241, 318, 363, 407, 450, 129, , 133
ESP10, 237, 309, 356, 399, 443, 131, , 135
ESP10, 229, 300, 349, 391, 434, 133, , 137
ESP10, 235, 308, 355, 401, 438, 135, , 139
ESP10, 236, 313, 357, 403, 438, 137, , 141
ESP10, 247, 323, 366, 415, 448, 139, , 143
ESP10, 248, 325, 365, 413, 447, 141, , 145
ESP10, 248, 325, 367, 414, 448, 143, , 147
ESP10, 250, 331, 369, 415, 448, 145, , 149
ESP10, 246, 331, 367, 415, 444, 148, , 152
ESP10, 249, 334, 371, 417, 446, 150, , 154
ESP10, 247, 332, 371, 415, 446, 152, , 156
ESP10, 249, 331, 371, 415, 449, 154, , 158
ESP10, 257, 334, 372, 418, 451, 156, , 160
ESP10, 257, 334, 370, 417, 449, 158, , 162
ESP10, 256, 336, 375, 417, 453, 160, , 164
ESP10, 253, 334, 373, 415, 453, 162, , 166
ESP10, 254, 335, 373, 416, 456, 164, , 168
ESP10, 245, 325, 364, 409, 449, 166, , 170
ESP10, 252, 332, 372, 417, 458, 169, , 173
ESP10, 252, 329, 368, 419, 456, 171, , 175
ESP10, 259, 330, 371, 424, 460, 173, , 177
ESP10, 262, 334, 367, 424, 456, 175, , 179
ESP10, 273, 334, 367, 421, 454, 177, , 181
ESP10, 275, 333, 370, 420, 453, 179, , 183
ESP10, 291, 352, 388, 432, 466, 181, , 185
ESP10, 292, 348, 389, 430, 466, 183, , 187
ESP10, 294, 348, 392, 428, 467, 185, , 189
ESP10, 291, 343, 389, 422, 462, 187, , 191
ESP10, 289, 340, 389, 423, 460, 189, , 193
ESP10, 294, 347, 399, 432, 464, 192, , 196
ESP10, 288, 342, 395, 433, 463, 194, , 198
ESP10, 283, 338, 391, 431, 460, 196, , 200
ESP10, 293, 344, 395, 435, 468, 198, , 202
ESP10, 273, 326, 376, 415, 448, 200, , 204
ESP10, 261, 315, 363, 402, 436, 202, , 206
ESP10, 257, 312, 364, 400, 432, 204, , 208
ESP10, 249, 301, 356, 389, 423, 206, , 210
ESP10, 271, 320, 368, 403, 442, 208, , 212
ESP10, 261, 316, 361, 395, 434, 210, , 214
ESP10, 241, 295, 341, 377, 413, 212, , 216
ESP10, 237, 288, 334, 372, 405, 215, , 219
ESP10, 247, 297, 343, 381, 416, 217, , 221
ESP10, 264, 310, 357, 395, 430, 219, , 223
ESP10, 263, 309, 356, 397, 427, 221, , 225
ESP10, 266, 308, 356, 395, 428, 223, , 227
ESP10, 267, 309, 357, 396, 429, 225, , 229
ESP10, 263, 304, 353, 393, 425, 227, , 231
ESP10, 257, 299, 347, 388, 419, 229, , 233
ESP10, 247, 292, 336, 379, 411, 231, , 235
ESP10, 244, 290, 334, 378, 408, 233, , 237
ESP10, 239, 288, 333, 376, 405, 236, , 240
ESP10, 251, 304, 345, 389, 416, 238, , 242
ESP10, 254, 308, 349, 392, 419, 240, , 244
ESP10, 264, 317, 363, 400, 426, 242, , 246
ESP10, 265, 318, 362, 399, 425, 244, , 248
ESP10, 262, 314, 362, 396, 421, 246, , 250
ESP10, 255, 308, 358, 389, 413, 248, , 252
ESP10, 263, 318, 364, 397, 420, 250, , 254
ESP10, 274, 319, 366, 405, 428, 252, , 256
ESP10, 278, 318, 365, 405, 428, 254, , 258
ESP10, 264, 306, 352, 392, 417, 256, , 260
ESP10, 266, 311, 354, 396, 418, 259, , 263
ESP10, 270, 316, 357, 401, 422, 261, , 265
ESP10, 263, 313, 354, 395, 418, 263, , 267
ESP10, 267, 316, 355, 395, 417, 265, , 269
ESP10, 272, 326, 359, 399, 420, 267, , 271
ESP10, 275, 330, 361, 401, 421, 269, , 273
ESP10, 279, 332, 363, 403, 421, 271, , 275
ESP10, 284, 331, 364, 402, 424, 273, , 277
ESP10, 271, 322, 358, 390, 417, 275, , 279
ESP10, 269, 324, 359, 391, 420, 277, , 281
ESP10, 271, 325, 361, 391, 420, 279, , 283
ESP10, 278, 328, 366, 393, 422, 282, , 286
ESP10, 277, 327, 371, 394, 421, 284, , 288
ESP10, 281, 332, 373, 402, 423, 286, , 290
ESP10, 283, 336, 374, 402, 423, 288, , 292
ESP10, 284, 333, 369, 398, 420, 290, , 294
ESP10, 282, 329, 365, 396, 416, 292, , 296
ESP10, 290, 337, 372, 402, 423, 294, , 298
ESP10, 290, 341, 372, 403, 431, 296, , 300
ESP10, 305, 348, 382, 411, 440, 298, , 302
ESP10, 309, 349, 382, 409, 438, 300, , 304
ESP10, 315, 355, 390, 415, 442, 303, , 307
ESP10, 315, 354, 390, 413, 440, 305, , 309
ESP10, 324, 361, 398, 420, 446, 307, , 311
ESP10, 322, 362, 396, 417, 444, 309, , 313
ESP10, 315, 355, 389, 409, 438, 311, , 315
ESP10, 315, 354, 388, 411, 438, 313, , 317
ESP10, 316, 357, 388, 410, 441, 315, , 319
ESP10, 322, 359, 390, 413, 449, 317, , 321
ESP10, 323, 358, 393, 412, 448, 319, , 323
ESP10, 323, 360, 392, 414, 447, 321, , 325
ESP10, 321, 358, 390, 412, 444, 323, , 327
ESP10, 320, 352, 383, 405, 437, 326, , 330
ESP10, 319, 356, 384, 405, 438, 328, , 332
ESP10, 318, 357, 382, 405, 435, 330, , 334
ESP10, 320, 358, 386, 406, 435, 332, , 336
ESP10, 317, 354, 381, 402, 431, 334, , 338
ESP10, 326, 364, 391, 412, 438, 336, , 340
ESP10, 326, 367, 391, 413, 438, 338, , 342
ESP10, 330, 368, 391, 417, 440, 340, , 344
ESP10, 334, 368, 393, 418, 440, 342, , 346
ESP10, 338, 373, 395, 420, 441, 344, , 348
ESP10, 332, 366, 396, 412, 435, 346, , 350
ESP10, 337, 366, 396, 412, 435, 349, , 353
ESP10, 336, 366, 394, 411, 433, 351, , 355
ESP10, 333, 364, 386, 406, 428, 353, , 357
ESP10, 335, 365, 386, 408, 429, 355, , 359
ESP10, 346, 372, 395, 419, 438, 357, , 361
ESP10, 340, 366, 390, 413, 432, 359, , 363
ESP10, 345, 370, 395, 417, 437, 361, , 365
ESP10, 339, 370, 395, 411, 433, 363, , 367
ESP10, 345, 372, 399, 416, 435, 365, , 369
ESP10, 342, 373, 400, 415, 433, 367, , 371
ESP10, 360, 393, 420, 434, 449, 370, , 374
ESP10, 367, 402, 426, 441, 455, 372, , 376
ESP10, 374, 405, 428, 442, 457, 374, , 378
ESP10, 381, 411, 433, 448, 462, 376, , 380
ESP10, 380, 409, 430, 445, 459, 378, , 382
ESP10, 380, 409, 428, 446, 456, 380, , 384
ESP10, 378, 408, 424, 444, 452, 382, , 386
ESP10, 381, 408, 426, 445, 452, 384, , 388
ESP10, 379, 403, 421, 441, 448, 386, , 390
ESP10, 372, 395, 416, 433, 441, 388, , 392
ESP10, 370, 392, 414, 428, 439, 390, , 394
ESP10, 359, 382, 404, 420, 429, 393, , 397
ESP10, 356, 382, 401, 416, 426, 395, , 399
ESP10, 348, 375, 394, 411, 418, 397, , 401
ESP10, 344, 370, 389, 405, 413, 399, , 403
ESP10, 342, 366, 387, 400, 408, 401, , 405
ESP10, 355, 381, 400, 412, 421, 403, , 407
ESP10, 352, 379, 395, 411, 422, 405, , 409
ESP10, 340, 368, 384, 401, 412, 407, , 411
ESP10, 337, 364, 384, 398, 412, 409, , 413
ESP10, 337, 362, 384, 399, 411, 411, , 415
ESP10, 339, 361, 379, 397, 411, 413, , 417
ESP10, 346, 362, 379, 396, 409, 416, , 420
ESP10, 342, 357, 375, 391, 404, 418, , 422
ESP10, 343, 358, 377, 393, 402, 420, , 424
ESP10, 347, 362, 379, 396, 405, 422, , 426
ESP10, 351, 363, 383, 397, 407, 424, , 428
ESP10, 357, 369, 389, 402, 411, 426, , 430
ESP10, 357, 371, 391, 401, 411, 428, , 432
ESP10, 354, 369, 388, 398, 408, 430, , 434
ESP10, 351, 367, 384, 395, 405, 432, , 436
ESP10, 349, 363, 379, 391, 400, 434, , 438
ESP10, 356, 371, 387, 397, 405, 437, , 441
ESP10, 354, 370, 388, 397, 405, 439, , 443
ESP10, 356, 371, 388, 397, 406, 441, , 445
ESP10, 358, 372, 389, 399, 407, 443, , 447
ESP10, 359, 375, 389, 400, 408, 445, , 449
ESP10, 359, 376, 389, 400, 408, 447, , 451
ESP10, 358, 369, 385, 395, 402, 449, , 453
ESP10, 359, 373, 387, 396, 403, 451, , 455
ESP10, 361, 376, 390, 399, 408, 453, , 457
ESP10, 362, 378, 390, 400, 408, 455, , 459
ESP10, 370, 387, 401, 411, 418, 457, , 461
ESP10, 385, 402, 415, 427, 434, 460, , 464
ESP10, 387, 403, 415, 427, 436, 462, , 466
ESP10, 386, 402, 414, 426, 434, 464, , 468
ESP10, 381, 398, 410, 422, 429, 466, , 470
ESP10, 385, 396, 411, 420, 428, 468, , 472
ESP10, 386, 399, 412, 421, 429, 470, , 474
ESP10, 384, 398, 410, 420, 429, 472, , 476
ESP10, 383, 396, 410, 418, 427, 474, , 478
ESP10, 382, 396, 411, 418, 425, 476, , 480
ESP10, 382, 396, 410, 417, 424, 478, , 482
ESP10, 384, 399, 412, 418, 426, 480, , 484
ESP10, 383, 399, 411, 416, 426, 483, , 487
ESP10, 382, 398, 409, 415, 425, 485, , 489
ESP10, 385, 399, 410, 416, 426, 487, , 491
ESP10, 388, 401, 412, 417, 427, 489, , 493
ESP10, 398, 410, 423, 428, 438, 491, , 495
ESP10, 401, 412, 423, 427, 439, 493, , 497
ESP10, 405, 416, 427, 431, 442, 495, , 499
ESP10, 405, 415, 427, 430, 441, 497, , 501
ESP10, 404, 415, 427, 432, 440, 499, , 503
ESP10, 403, 410, 422, 429, 434, 501, , 505
ESP10, 405, 412, 423, 430, 435, 504, , 508
ESP10, 421, 428, 436, 443, 448, 506, , 510
ESP10, 421, 428, 435, 443, 449, 508, , 512
ESP10, 423, 428, 435, 443, 449, 510, , 514
ESP10, 424, 430, 437, 444, 451, 512, , 516
ESP10, 424, 432, 437, 445, 450, 514, , 518
ESP10, 424, 431, 437, 444, 450, 516, , 520
ESP10, 426, 434, 439, 446, 453, 518, , 522
ESP10, 412, 422, 427, 434, 441, 520, , 524
ESP10, 414, 422, 429, 435, 441, 522, , 526
ESP10, 415, 422, 430, 437, 441, 524, , 528
ESP10, 416, 423, 430, 437, 442, 527, , 531
ESP10, 419, 424, 432, 437, 443, 529, , 533
ESP10, 419, 425, 431, 437, 443, 531, , 535
ESP10, 422, 429, 435, 440, 446, 533, , 537
ESP10, 418, 424, 431, 436, 441, 535, , 539
ESP10, 418, 423, 431, 437, 441, 537, , 541
ESP10, 423, 427, 435, 441, 445, 539, , 543
ESP10, 421, 426, 432, 439, 443, 541, , 545
ESP10, 420, 425, 431, 437, 442, 543, , 547
ESP10, 420, 424, 430, 437, 441, 545, , 549
ESP10, 421, 424, 431, 437, 441, 547, , 551
ESP10, 422, 425, 432, 438, 442, 550, , 554
ESP10, 421, 425, 431, 437, 441, 552, , 556
ESP10, 419, 422, 428, 433, 437, 554, , 558
ESP10, 418, 421, 428, 433, 437, 556, , 560
ESP10, 423, 426, 432, 437, 441, 558, , 562
ESP10, 424, 427, 434, 438, 442, 560, , 564
ESP10, 423, 426, 433, 436, 440, 562, , 566
ESP10, 424, 428, 434, 437, 441, 564, , 568
ESP10, 423, 428, 433, 437, 440, 566, , 570
ESP10, 423, 429, 434, 437, 441, 568, , 572
ESP10, 423, 428, 433, 436, 439, 571, , 575
ESP10, 421, 426, 431, 434, 437, 573, , 577
ESP10, 425, 429, 434, 437, 439, 575, , 579
ESP10, 426, 430, 435, 437, 440, 577, , 581
ESP10, 428, 432, 436, 439, 441, 579, , 583
ESP10, 427, 432, 436, 439, 441, 581, , 585
ESP10, 426, 431, 435, 438, 439, 583, , 587
ESP10, 428, 433, 437, 440, 441, 585, , 589
ESP10, 427, 431, 436, 439, 440, 587, , 591
ESP10, 425, 430, 434, 437, 438, 589, , 593
ESP10, 425, 429, 434, 436, 437, 591, , 595
ESP10, 425, 430, 434, 436, 437, 594, , 598
ESP10, 426, 430, 434, 436, 438, 596, , 600
ESP10, 426, 431, 435, 437, 438, 598, , 602
ESP10, 426, 430, 435, 436, 438, 600, , 604
ESP10, 425, 429, 433, 434, 436, 602, , 606
ESP10, 427, 430, 433, 435, 438, 604, , 608
ESP10, 428, 430, 433, 435, 437, 606, , 610
ESP10, 429, 431, 433, 435, 437, 608, , 612
ESP10, 429, 431, 434, 435, 437, 610, , 614
ESP10, 429, 431, 434, 436, 437, 612, , 616
ESP10, 429, 431, 434, 436, 437, 614, , 618
ESP10, 430, 432, 434, 435, 437, 617, , 621
ESP10, 430, 432, 434, 436, 437, 619, , 623
ESP10, 429, 432, 434, 435, 437, 621, , 625
ESP10, 431, 433, 435, 437, 438, 623, , 627
ESP10, 430, 433, 434, 436, 437, 625, , 629
ESP10, 432, 433, 435, 437, 438, 627, , 631
ESP10, 431, 433, 435, 437, 438, 629, , 633
ESP10, 431, 433, 435, 437, 438, 631, , 635
ESP10, 432, 434, 437, 438, 439, 633, , 637
ESP10, 429, 431, 432, 433, 434, 635, , 639
ESP10, 429, 431, 432, 433, 434, 638, , 642
ESP10, 429, 431, 432, 433, 434, 640, , 644
ESP10, 430, 432, 432, 433, 434, 642, , 646
ESP10, 430, 431, 432, 433, 434, 644, , 648
ESP10, 426, 429, 430, 431, 431, 646, , 650
ESP10, 426, 429, 430, 430, 431, 648, , 652
ESP10, 427, 429, 430, 431, 431, 650, , 654
ESP10, 427, 429, 430, 431, 431, 652, , 656
ESP10, 427, 429, 430, 430, 431, 654, , 658
ESP10, 425, 427, 428, 429, 429, 656, , 660
ESP10, 426, 428, 429, 429, 430, 658, , 662
ESP10, 428, 429, 430, 430, 431, 661, , 665
ESP10, 426, 428, 429, 429, 430, 663, , 667
ESP10, 426, 428, 428, 429, 429, 665, , 669
ESP10, 428, 429, 430, 430, 431, 667, , 671
ESP10, 428, 429, 430, 431, 431, 669, , 673
ESP10, 428, 429, 430, 430, 431, 671, , 675
ESP10, 426, 427, 428, 429, 429, 673, , 677
ESP10, 416, 420, 423, 424, 425, 675, , 679
ESP10, 423, 425, 427, 427, 428, 677, , 681
ESP10, 423, 424, 426, 427, 427, 679, , 683
ESP10, 423, 424, 426, 427, 427, 681, , 685
ESP10, 423, 424, 426, 426, 427, 684, , 688
ESP10, 422, 424, 425, 426, 426, 686, , 690
ESP10, 421, 422, 424, 425, 425, 688, , 692
ESP10, 423, 424, 425, 426, 426, 690, , 694
ESP10, 423, 424, 425, 426, 426, 692, , 696
ESP10, 424, 425, 426, 426, 426, 694, , 698
ESP10, 426, 426, 427, 428, 428, 696, , 700
ESP10, 428, 429, 430, 430, 431, 698, , 702
ESP10, 430, 431, 432, 432, 432, 700, , 704
ESP10, 430, 431, 432, 432, 432, 702, , 706
ESP10, 430, 431, 432, 432, 432, 705, , 709
ESP10, 430, 431, 432, 432, 432, 707, , 711
ESP10, 430, 431, 432, 432, 432, 709, , 713
ESP10, 431, 432, 432, 433, 433, 711, , 715
ESP10, 431, 432, 432, 433, 433, 713, , 717
ESP10, 431, 432, 432, 432, 433, 715, , 719
ESP10, 430, 431, 432, 432, 432, 717, , 721
ESP10, 430, 431, 432, 432, 432, 719, , 723
ESP10, 429, 431, 431, 431, 432, 721, , 725
ESP10, 430, 431, 432, 432, 432, 723, , 727
ESP10, 429, 431, 432, 432, 432, 725, , 729
ESP10, 430, 431, 432, 432, 432, 728, , 732
ESP10, 430, 431, 432, 432, 432, 730, , 734
ESP10, 430, 431, 432, 432, 432, 732, , 736
ESP10, 430, 431, 432, 432, 432, 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/STHW1W_SQIN.ESPF10.csv
STHW1W_SQIN.ESPF0.csv|2026-08-15
STHW1W_SQIN.ESPF10.csv|2026-08-15
STHW1W_SQIN.ESPFM.csv|2026-08-15
APR-SEP
STEHEKIN - AT STEHEKIN
(
STHW1
)
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
481
713
88
1045
814
APR-JUL
436
624
88
848
710
APR-AUG
464
680
88
975
778
JAN-SEP
549
826
91
1134
913
JAN-JUL
500
731
90
946
809
OCT-SEP
591
940
90
1210
1046
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/STHW1W_SQIN.ESPF10.csv
STHW1W_SQIN.ESPF0.csv|2026-08-15
STHW1W_SQIN.ESPF10.csv|2026-08-15
STHW1W_SQIN.ESPFM.csv|2026-08-15
APR-SEP
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ESP10,ESPM,ESP0
ESP10,ESPM,ESP0
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