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Water Year
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CHELAN - LAKE CHELAN DAM
(
CHDW1
)
Forecasts for Water Year
2026
Official Water Supply
ESP with 10 Days QPF
Ensemble:
2026-08-16
Issued:
2026-08-16
Hide Forecast
Forecast
Period
Forecasts Are in KAF
30 Year
Average
(1991-2020)
90 %
50 %
%
Average
10 %
APR-SEP
837
838
74
845
1139
APR-JUL
791
791
77
791
1029
APR-AUG
823
823
75
823
1102
JAN-SEP
1245
1246
94
1253
1326
JAN-JUL
1199
1199
99
1199
1217
OCT-SEP
1699
1700
112
1707
1518
Experimental Water Supply
HEFS with 15 days EQPF
Ensemble:
2026-08-16
Issued:
2026-08-16
Hide Forecast
APR-SEP
837
838
74
849
1139
APR-JUL
791
791
77
791
1029
APR-AUG
823
823
75
823
1102
JAN-SEP
1245
1246
94
1256
1326
JAN-JUL
1199
1199
99
1199
1217
OCT-SEP
1699
1700
112
1710
1518
Reference
ESP with 0 Days QPF
Ensemble:
2026-08-16
Issued:
2026-08-16
Hide Forecast
APR-SEP
837
839
74
848
1139
APR-JUL
791
791
77
791
1029
APR-AUG
823
823
75
824
1102
JAN-SEP
1245
1246
94
1255
1326
JAN-JUL
1199
1199
99
1199
1217
OCT-SEP
1699
1700
112
1709
1518
Move the mouse over the desired "Forecast Period" to display a graph.
ESP10, 259, 342, 390, 425, 453, 70, , 74
ESP10, 260, 342, 387, 424, 452, 72, , 76
ESP10, 261, 343, 389, 424, 453, 74, , 78
ESP10, 263, 343, 389, 424, 453, 76, , 80
ESP10, 268, 347, 393, 427, 455, 78, , 82
ESP10, 268, 348, 393, 428, 455, 81, , 85
ESP10, 270, 348, 392, 427, 455, 83, , 87
ESP10, 271, 349, 396, 427, 456, 85, , 89
ESP10, 271, 349, 396, 427, 456, 87, , 91
ESP10, 269, 346, 391, 424, 453, 89, , 93
ESP10, 271, 347, 394, 427, 454, 91, , 95
ESP10, 271, 347, 394, 428, 456, 93, , 97
ESP10, 273, 347, 397, 429, 458, 95, , 99
ESP10, 272, 347, 396, 429, 457, 97, , 101
ESP10, 269, 344, 393, 427, 457, 99, , 103
ESP10, 259, 335, 385, 419, 450, 101, , 105
ESP10, 254, 331, 380, 414, 446, 103, , 107
ESP10, 253, 330, 379, 414, 446, 106, , 110
ESP10, 259, 335, 384, 417, 451, 108, , 112
ESP10, 258, 337, 381, 416, 451, 110, , 114
ESP10, 252, 331, 373, 410, 447, 112, , 116
ESP10, 257, 337, 377, 413, 453, 114, , 118
ESP10, 245, 329, 366, 406, 445, 116, , 120
ESP10, 252, 335, 373, 419, 450, 118, , 122
ESP10, 254, 337, 375, 424, 451, 120, , 124
ESP10, 248, 334, 370, 421, 448, 122, , 126
ESP10, 248, 332, 371, 420, 447, 124, , 128
ESP10, 253, 335, 374, 422, 449, 126, , 130
ESP10, 252, 331, 370, 418, 446, 129, , 133
ESP10, 248, 322, 365, 412, 440, 131, , 135
ESP10, 239, 311, 361, 405, 432, 133, , 137
ESP10, 246, 321, 368, 409, 436, 135, , 139
ESP10, 247, 325, 371, 412, 436, 137, , 141
ESP10, 259, 339, 381, 422, 445, 139, , 143
ESP10, 260, 339, 380, 421, 444, 141, , 145
ESP10, 259, 338, 382, 420, 444, 143, , 147
ESP10, 262, 345, 384, 420, 444, 145, , 149
ESP10, 257, 343, 379, 419, 441, 147, , 151
ESP10, 260, 345, 388, 422, 442, 149, , 153
ESP10, 258, 344, 385, 420, 443, 151, , 155
ESP10, 261, 344, 385, 423, 445, 154, , 158
ESP10, 269, 348, 386, 429, 447, 156, , 160
ESP10, 268, 346, 385, 428, 445, 158, , 162
ESP10, 268, 347, 387, 427, 448, 160, , 164
ESP10, 265, 345, 386, 426, 448, 162, , 166
ESP10, 266, 346, 387, 425, 451, 164, , 168
ESP10, 256, 337, 380, 418, 446, 166, , 170
ESP10, 263, 344, 390, 427, 454, 168, , 172
ESP10, 263, 341, 386, 425, 454, 170, , 174
ESP10, 271, 345, 388, 427, 456, 172, , 176
ESP10, 274, 344, 383, 424, 452, 174, , 178
ESP10, 286, 346, 383, 422, 451, 177, , 181
ESP10, 288, 344, 387, 421, 454, 179, , 183
ESP10, 305, 359, 403, 438, 467, 181, , 185
ESP10, 306, 355, 404, 435, 464, 183, , 187
ESP10, 308, 355, 402, 433, 463, 185, , 189
ESP10, 305, 350, 399, 428, 459, 187, , 191
ESP10, 302, 348, 398, 429, 457, 189, , 193
ESP10, 307, 355, 404, 433, 461, 191, , 195
ESP10, 302, 352, 403, 438, 462, 193, , 197
ESP10, 297, 348, 399, 437, 459, 195, , 199
ESP10, 307, 357, 406, 440, 468, 197, , 201
ESP10, 285, 339, 388, 421, 450, 199, , 203
ESP10, 272, 329, 377, 410, 438, 202, , 206
ESP10, 268, 328, 376, 408, 436, 204, , 208
ESP10, 260, 316, 370, 400, 430, 206, , 210
ESP10, 283, 331, 380, 411, 443, 208, , 212
ESP10, 273, 323, 374, 404, 437, 210, , 214
ESP10, 252, 301, 357, 390, 420, 212, , 216
ESP10, 247, 292, 350, 387, 412, 214, , 218
ESP10, 258, 302, 357, 394, 422, 216, , 220
ESP10, 276, 317, 371, 404, 434, 218, , 222
ESP10, 276, 315, 370, 403, 431, 220, , 224
ESP10, 278, 315, 371, 401, 431, 222, , 226
ESP10, 279, 316, 373, 402, 432, 225, , 229
ESP10, 275, 313, 369, 398, 429, 227, , 231
ESP10, 268, 308, 362, 393, 422, 229, , 233
ESP10, 258, 299, 352, 385, 415, 231, , 235
ESP10, 256, 301, 349, 386, 413, 233, , 237
ESP10, 251, 301, 345, 384, 410, 235, , 239
ESP10, 263, 315, 356, 395, 420, 237, , 241
ESP10, 266, 321, 359, 398, 423, 239, , 243
ESP10, 277, 330, 369, 409, 429, 241, , 245
ESP10, 278, 335, 369, 409, 428, 243, , 247
ESP10, 274, 331, 369, 405, 424, 245, , 249
ESP10, 267, 324, 363, 400, 418, 248, , 252
ESP10, 275, 329, 371, 407, 428, 250, , 254
ESP10, 288, 332, 375, 412, 435, 252, , 256
ESP10, 292, 333, 376, 413, 437, 254, , 258
ESP10, 277, 321, 364, 402, 424, 256, , 260
ESP10, 279, 324, 368, 405, 426, 258, , 262
ESP10, 282, 328, 372, 408, 429, 260, , 264
ESP10, 275, 325, 368, 402, 425, 262, , 266
ESP10, 279, 326, 368, 402, 424, 264, , 268
ESP10, 284, 333, 375, 411, 429, 266, , 270
ESP10, 288, 336, 376, 412, 430, 268, , 272
ESP10, 292, 337, 377, 413, 431, 270, , 274
ESP10, 298, 337, 379, 414, 430, 273, , 277
ESP10, 284, 331, 371, 404, 424, 275, , 279
ESP10, 283, 335, 372, 403, 426, 277, , 281
ESP10, 285, 337, 373, 404, 426, 279, , 283
ESP10, 291, 341, 377, 406, 428, 281, , 285
ESP10, 291, 343, 378, 405, 427, 283, , 287
ESP10, 295, 346, 382, 407, 428, 285, , 289
ESP10, 297, 350, 384, 411, 428, 287, , 291
ESP10, 298, 346, 384, 408, 423, 289, , 293
ESP10, 296, 342, 380, 404, 419, 291, , 295
ESP10, 304, 348, 386, 410, 424, 293, , 297
ESP10, 305, 351, 388, 412, 430, 296, , 300
ESP10, 316, 360, 395, 417, 438, 298, , 302
ESP10, 320, 360, 394, 416, 436, 300, , 304
ESP10, 327, 368, 399, 420, 442, 302, , 306
ESP10, 327, 370, 399, 420, 442, 304, , 308
ESP10, 336, 379, 405, 428, 448, 306, , 310
ESP10, 337, 376, 402, 425, 447, 308, , 312
ESP10, 330, 369, 395, 418, 441, 310, , 314
ESP10, 331, 369, 394, 418, 444, 312, , 316
ESP10, 331, 369, 395, 418, 446, 314, , 318
ESP10, 337, 371, 398, 424, 448, 316, , 320
ESP10, 339, 371, 398, 424, 447, 318, , 322
ESP10, 338, 370, 397, 424, 446, 321, , 325
ESP10, 337, 372, 395, 422, 443, 323, , 327
ESP10, 335, 367, 390, 415, 437, 325, , 329
ESP10, 335, 367, 392, 415, 438, 327, , 331
ESP10, 334, 366, 391, 413, 437, 329, , 333
ESP10, 335, 366, 393, 413, 438, 331, , 335
ESP10, 332, 362, 387, 411, 434, 333, , 337
ESP10, 341, 373, 395, 419, 441, 335, , 339
ESP10, 342, 378, 397, 420, 441, 337, , 341
ESP10, 346, 380, 399, 422, 443, 339, , 343
ESP10, 351, 380, 399, 423, 443, 341, , 345
ESP10, 355, 381, 405, 426, 445, 344, , 348
ESP10, 349, 374, 398, 421, 438, 346, , 350
ESP10, 355, 380, 398, 422, 438, 348, , 352
ESP10, 353, 381, 397, 422, 437, 350, , 354
ESP10, 349, 379, 391, 416, 432, 352, , 356
ESP10, 349, 380, 392, 417, 432, 354, , 358
ESP10, 360, 386, 400, 424, 440, 356, , 360
ESP10, 354, 381, 394, 420, 434, 358, , 362
ESP10, 358, 385, 403, 425, 437, 360, , 364
ESP10, 353, 382, 402, 424, 433, 362, , 366
ESP10, 359, 384, 405, 426, 435, 364, , 368
ESP10, 356, 381, 405, 424, 432, 366, , 370
ESP10, 375, 405, 422, 442, 449, 369, , 373
ESP10, 380, 411, 428, 446, 454, 371, , 375
ESP10, 387, 414, 430, 447, 455, 373, , 377
ESP10, 394, 418, 436, 453, 460, 375, , 379
ESP10, 393, 417, 434, 451, 457, 377, , 381
ESP10, 393, 416, 433, 450, 455, 379, , 383
ESP10, 391, 416, 433, 448, 453, 381, , 385
ESP10, 394, 415, 434, 448, 454, 383, , 387
ESP10, 391, 412, 431, 443, 451, 385, , 389
ESP10, 384, 408, 426, 437, 446, 387, , 391
ESP10, 383, 405, 425, 435, 444, 389, , 393
ESP10, 375, 396, 415, 428, 435, 392, , 396
ESP10, 372, 395, 412, 425, 432, 394, , 398
ESP10, 365, 389, 404, 419, 425, 396, , 400
ESP10, 359, 383, 399, 414, 418, 398, , 402
ESP10, 356, 378, 393, 409, 414, 400, , 404
ESP10, 371, 394, 406, 422, 427, 402, , 406
ESP10, 367, 393, 405, 418, 426, 404, , 408
ESP10, 355, 381, 394, 408, 415, 406, , 410
ESP10, 351, 377, 390, 405, 411, 408, , 412
ESP10, 351, 375, 388, 403, 415, 410, , 414
ESP10, 352, 373, 388, 401, 413, 412, , 416
ESP10, 357, 371, 387, 400, 413, 414, , 418
ESP10, 353, 368, 382, 396, 412, 417, , 421
ESP10, 354, 368, 382, 397, 413, 419, , 423
ESP10, 358, 370, 385, 399, 416, 421, , 425
ESP10, 358, 371, 385, 400, 416, 423, , 427
ESP10, 362, 375, 390, 405, 421, 425, , 429
ESP10, 361, 377, 390, 406, 421, 427, , 431
ESP10, 358, 374, 387, 402, 417, 429, , 433
ESP10, 356, 375, 384, 399, 414, 431, , 435
ESP10, 353, 371, 381, 396, 409, 433, , 437
ESP10, 358, 379, 389, 402, 414, 435, , 439
ESP10, 357, 380, 390, 401, 412, 437, , 441
ESP10, 358, 381, 392, 401, 414, 440, , 444
ESP10, 361, 383, 395, 404, 416, 442, , 446
ESP10, 362, 384, 395, 405, 419, 444, , 448
ESP10, 361, 384, 395, 405, 419, 446, , 450
ESP10, 358, 378, 390, 398, 412, 448, , 452
ESP10, 360, 380, 391, 400, 414, 450, , 454
ESP10, 362, 383, 395, 402, 417, 452, , 456
ESP10, 362, 386, 395, 403, 417, 454, , 458
ESP10, 372, 396, 408, 416, 428, 456, , 460
ESP10, 388, 412, 424, 432, 444, 458, , 462
ESP10, 392, 413, 424, 434, 445, 460, , 464
ESP10, 391, 411, 423, 432, 443, 462, , 466
ESP10, 386, 407, 420, 428, 438, 465, , 469
ESP10, 385, 407, 420, 428, 437, 467, , 471
ESP10, 397, 412, 422, 432, 438, 469, , 473
ESP10, 396, 410, 420, 431, 437, 471, , 475
ESP10, 397, 410, 420, 429, 436, 473, , 477
ESP10, 400, 411, 421, 429, 437, 475, , 479
ESP10, 403, 413, 423, 431, 437, 477, , 481
ESP10, 404, 415, 423, 431, 437, 479, , 483
ESP10, 406, 416, 423, 433, 438, 481, , 485
ESP10, 405, 416, 424, 433, 437, 483, , 487
ESP10, 406, 416, 425, 433, 438, 485, , 489
ESP10, 408, 418, 426, 435, 439, 488, , 492
ESP10, 415, 423, 432, 442, 447, 490, , 494
ESP10, 417, 424, 434, 442, 448, 492, , 496
ESP10, 420, 427, 435, 444, 450, 494, , 498
ESP10, 418, 427, 434, 443, 449, 496, , 500
ESP10, 420, 427, 434, 443, 448, 498, , 502
ESP10, 420, 428, 434, 442, 446, 500, , 504
ESP10, 423, 430, 436, 444, 447, 502, , 506
ESP10, 436, 443, 448, 455, 458, 504, , 508
ESP10, 423, 428, 435, 441, 445, 506, , 510
ESP10, 424, 428, 434, 441, 445, 508, , 512
ESP10, 426, 430, 435, 441, 445, 510, , 514
ESP10, 425, 430, 436, 442, 446, 513, , 517
ESP10, 425, 430, 436, 442, 446, 515, , 519
ESP10, 436, 441, 448, 453, 455, 517, , 521
ESP10, 425, 430, 437, 443, 445, 519, , 523
ESP10, 417, 424, 428, 435, 437, 521, , 525
ESP10, 418, 425, 430, 436, 438, 523, , 527
ESP10, 419, 427, 431, 438, 441, 525, , 529
ESP10, 423, 429, 433, 439, 442, 527, , 531
ESP10, 423, 429, 432, 439, 443, 529, , 533
ESP10, 429, 434, 437, 443, 448, 531, , 535
ESP10, 425, 430, 434, 440, 445, 533, , 537
ESP10, 425, 429, 433, 440, 445, 536, , 540
ESP10, 430, 434, 438, 445, 450, 538, , 542
ESP10, 428, 432, 436, 443, 448, 540, , 544
ESP10, 428, 431, 435, 442, 446, 542, , 546
ESP10, 427, 431, 435, 441, 445, 544, , 548
ESP10, 428, 430, 436, 440, 445, 546, , 550
ESP10, 429, 431, 437, 440, 446, 548, , 552
ESP10, 427, 431, 436, 439, 444, 550, , 554
ESP10, 424, 427, 432, 436, 439, 552, , 556
ESP10, 424, 427, 431, 436, 439, 554, , 558
ESP10, 428, 433, 437, 440, 444, 556, , 560
ESP10, 429, 433, 438, 440, 443, 558, , 562
ESP10, 428, 432, 436, 438, 442, 561, , 565
ESP10, 428, 432, 436, 438, 441, 563, , 567
ESP10, 428, 431, 436, 437, 440, 565, , 569
ESP10, 429, 433, 437, 438, 441, 567, , 571
ESP10, 429, 433, 437, 439, 441, 569, , 573
ESP10, 424, 429, 432, 435, 437, 571, , 575
ESP10, 430, 434, 436, 438, 440, 573, , 577
ESP10, 431, 435, 437, 440, 441, 575, , 579
ESP10, 431, 436, 438, 440, 441, 577, , 581
ESP10, 431, 435, 437, 440, 441, 579, , 583
ESP10, 429, 433, 436, 438, 439, 581, , 585
ESP10, 430, 434, 437, 439, 440, 584, , 588
ESP10, 429, 433, 436, 438, 439, 586, , 590
ESP10, 427, 431, 434, 435, 436, 588, , 592
ESP10, 427, 431, 433, 435, 436, 590, , 594
ESP10, 427, 431, 433, 435, 436, 592, , 596
ESP10, 427, 431, 433, 434, 436, 594, , 598
ESP10, 427, 431, 433, 435, 435, 596, , 600
ESP10, 427, 430, 433, 434, 435, 598, , 602
ESP10, 426, 429, 432, 433, 434, 600, , 604
ESP10, 428, 430, 432, 433, 435, 602, , 606
ESP10, 428, 430, 432, 433, 435, 604, , 608
ESP10, 430, 431, 433, 434, 435, 607, , 611
ESP10, 429, 430, 432, 433, 434, 609, , 613
ESP10, 429, 430, 432, 433, 434, 611, , 615
ESP10, 429, 431, 432, 433, 434, 613, , 617
ESP10, 429, 431, 432, 433, 434, 615, , 619
ESP10, 429, 430, 432, 433, 433, 617, , 621
ESP10, 429, 430, 431, 432, 433, 619, , 623
ESP10, 430, 431, 432, 433, 434, 621, , 625
ESP10, 429, 431, 432, 433, 433, 623, , 627
ESP10, 429, 430, 431, 433, 433, 625, , 629
ESP10, 429, 431, 432, 433, 434, 627, , 631
ESP10, 429, 430, 431, 432, 433, 629, , 633
ESP10, 429, 431, 432, 433, 433, 632, , 636
ESP10, 427, 428, 430, 430, 430, 634, , 638
ESP10, 428, 429, 430, 430, 431, 636, , 640
ESP10, 428, 429, 430, 430, 431, 638, , 642
ESP10, 428, 429, 430, 430, 431, 640, , 644
ESP10, 428, 429, 430, 430, 431, 642, , 646
ESP10, 426, 428, 428, 429, 429, 644, , 648
ESP10, 426, 428, 428, 429, 429, 646, , 650
ESP10, 427, 428, 429, 429, 429, 648, , 652
ESP10, 427, 428, 429, 429, 429, 650, , 654
ESP10, 426, 427, 428, 428, 428, 652, , 656
ESP10, 425, 426, 427, 427, 428, 655, , 659
ESP10, 426, 426, 427, 427, 428, 657, , 661
ESP10, 426, 426, 427, 427, 428, 659, , 663
ESP10, 425, 426, 426, 427, 427, 661, , 665
ESP10, 425, 426, 426, 426, 427, 663, , 667
ESP10, 426, 427, 427, 427, 428, 665, , 669
ESP10, 426, 427, 427, 427, 428, 667, , 671
ESP10, 425, 426, 427, 427, 427, 669, , 673
ESP10, 424, 425, 425, 426, 426, 671, , 675
ESP10, 419, 420, 423, 423, 424, 673, , 677
ESP10, 422, 423, 424, 424, 425, 675, , 679
ESP10, 422, 423, 424, 425, 425, 677, , 681
ESP10, 422, 423, 424, 425, 425, 680, , 684
ESP10, 422, 423, 424, 424, 424, 682, , 686
ESP10, 421, 422, 423, 424, 424, 684, , 688
ESP10, 421, 422, 422, 423, 423, 686, , 690
ESP10, 422, 423, 423, 424, 424, 688, , 692
ESP10, 421, 422, 423, 423, 423, 690, , 694
ESP10, 422, 423, 423, 423, 424, 692, , 696
ESP10, 422, 423, 424, 424, 424, 694, , 698
ESP10, 424, 425, 425, 425, 425, 696, , 700
ESP10, 425, 426, 427, 427, 427, 698, , 702
ESP10, 425, 426, 426, 427, 427, 700, , 704
ESP10, 425, 426, 426, 426, 426, 703, , 707
ESP10, 425, 426, 426, 426, 426, 705, , 709
ESP10, 424, 425, 425, 425, 426, 707, , 711
ESP10, 425, 426, 427, 427, 427, 709, , 713
ESP10, 425, 426, 427, 427, 427, 711, , 715
ESP10, 425, 426, 426, 426, 427, 713, , 717
ESP10, 425, 426, 426, 426, 427, 715, , 719
ESP10, 424, 425, 426, 426, 426, 717, , 721
ESP10, 424, 425, 425, 425, 425, 719, , 723
ESP10, 424, 425, 426, 426, 426, 721, , 725
ESP10, 424, 425, 425, 425, 425, 723, , 727
ESP10, 424, 425, 425, 425, 426, 725, , 729
ESP10, 424, 425, 425, 426, 426, 728, , 732
ESP10, 424, 425, 426, 426, 426, 730, , 734
ESP10, 424, 425, 425, 426, 426, 732, , 736
ESP10, 424, 425, 425, 425, 425, 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/CHDW1W_SQIN.ESPF10.csv
CHDW1W_SQIN.ESPF0.csv|2026-08-16
CHDW1W_SQIN.ESPF10.csv|2026-08-16
CHDW1W_SQIN.ESPFM.csv|2026-08-16
APR-SEP
CHELAN - LAKE CHELAN DAM
(
CHDW1
)
Forecasts for Water Year
2027
Official Water Supply
ESP with 10 Days QPF
Ensemble:
2026-08-16
Issued:
2026-08-16
Hide Forecast
Forecast
Period
Forecasts Are in KAF
30 Year
Average
(1991-2020)
90 %
50 %
%
Average
10 %
APR-SEP
630
980
86
1609
1139
APR-JUL
584
880
85
1331
1029
APR-AUG
611
947
86
1502
1102
JAN-SEP
752
1202
91
1794
1326
JAN-JUL
706
1086
89
1528
1217
OCT-SEP
830
1455
96
1920
1518
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/CHDW1W_SQIN.ESPF10.csv
CHDW1W_SQIN.ESPF0.csv|2026-08-16
CHDW1W_SQIN.ESPF10.csv|2026-08-16
CHDW1W_SQIN.ESPFM.csv|2026-08-16
APR-SEP
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ESP10,ESPM,ESP0
ESP10,ESPM,ESP0
Last Forecast
