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Archive:
Water Year
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COWLITZ - NEAR KOSMOS
(
COKW1
)
Forecasts for Water Year
2026
Natural Forecast
ESP with 10 Days QPF
Ensemble:
2026-08-08
Issued:
2026-08-08
Hide Forecast
Forecast
Period
Forecasts Are in KAF
30 Year
Average
(1991-2020)
90 %
50 %
%
Average
10 %
APR-SEP
884
891
54
904
1650
APR-JUL
771
771
53
771
1461
APR-AUG
834
837
53
839
1566
JAN-SEP
2024
2030
74
2043
2760
JAN-JUL
1910
1910
74
1910
2571
OCT-SEP
3358
3364
93
3378
3608
Experimental
HEFS with 15 days EQPF
Ensemble:
2026-08-08
Issued:
2026-08-08
Hide Forecast
APR-SEP
884
891
54
903
1650
APR-JUL
771
771
53
771
1461
APR-AUG
833
837
53
840
1566
JAN-SEP
2023
2031
74
2043
2760
JAN-JUL
1910
1910
74
1910
2571
OCT-SEP
3358
3365
93
3377
3608
Reference
ESP with 0 Days QPF
Ensemble:
2026-08-08
Issued:
2026-08-08
Hide Forecast
APR-SEP
882
892
54
904
1650
APR-JUL
771
771
53
771
1461
APR-AUG
833
837
53
842
1566
JAN-SEP
2022
2031
74
2044
2760
JAN-JUL
1910
1910
74
1910
2571
OCT-SEP
3356
3365
93
3378
3608
Move the mouse over the desired "Forecast Period" to display a graph.
ESP10, 273, 307, 346, 401, 433, 70, , 74
ESP10, 273, 307, 347, 401, 433, 72, , 76
ESP10, 274, 307, 347, 401, 433, 74, , 78
ESP10, 274, 307, 347, 401, 433, 77, , 81
ESP10, 273, 306, 347, 401, 433, 79, , 83
ESP10, 273, 306, 347, 401, 432, 81, , 85
ESP10, 273, 306, 347, 400, 432, 83, , 87
ESP10, 273, 306, 347, 401, 432, 85, , 89
ESP10, 273, 306, 347, 400, 432, 87, , 91
ESP10, 273, 306, 346, 400, 432, 89, , 93
ESP10, 273, 306, 346, 400, 432, 92, , 96
ESP10, 274, 306, 346, 400, 432, 94, , 98
ESP10, 274, 306, 346, 400, 432, 96, , 100
ESP10, 274, 305, 347, 400, 432, 98, , 102
ESP10, 274, 305, 347, 399, 432, 100, , 104
ESP10, 273, 304, 347, 398, 432, 102, , 106
ESP10, 272, 304, 345, 395, 431, 104, , 108
ESP10, 272, 304, 343, 394, 431, 107, , 111
ESP10, 272, 303, 343, 393, 431, 109, , 113
ESP10, 273, 303, 345, 394, 432, 111, , 115
ESP10, 270, 299, 342, 389, 427, 113, , 117
ESP10, 273, 304, 351, 397, 432, 115, , 119
ESP10, 273, 303, 349, 396, 431, 117, , 121
ESP10, 273, 304, 351, 397, 432, 119, , 123
ESP10, 273, 304, 351, 397, 432, 122, , 126
ESP10, 273, 305, 352, 397, 432, 124, , 128
ESP10, 273, 305, 352, 398, 432, 126, , 130
ESP10, 273, 305, 352, 398, 432, 128, , 132
ESP10, 273, 305, 352, 398, 432, 130, , 134
ESP10, 272, 304, 352, 397, 431, 132, , 136
ESP10, 269, 301, 350, 394, 429, 134, , 138
ESP10, 272, 302, 352, 396, 431, 136, , 140
ESP10, 271, 302, 351, 396, 430, 139, , 143
ESP10, 274, 304, 354, 398, 431, 141, , 145
ESP10, 274, 304, 354, 398, 430, 143, , 147
ESP10, 274, 306, 358, 399, 431, 145, , 149
ESP10, 274, 306, 360, 398, 432, 147, , 151
ESP10, 271, 302, 356, 396, 427, 149, , 153
ESP10, 270, 300, 356, 395, 425, 151, , 155
ESP10, 271, 299, 358, 395, 425, 154, , 158
ESP10, 276, 302, 364, 398, 428, 156, , 160
ESP10, 279, 304, 367, 402, 429, 158, , 162
ESP10, 278, 301, 365, 398, 426, 160, , 164
ESP10, 286, 311, 374, 407, 434, 162, , 166
ESP10, 285, 311, 372, 405, 433, 164, , 168
ESP10, 283, 309, 370, 403, 431, 166, , 170
ESP10, 285, 309, 372, 405, 432, 169, , 173
ESP10, 289, 312, 376, 407, 435, 171, , 175
ESP10, 289, 311, 376, 407, 433, 173, , 177
ESP10, 291, 312, 377, 407, 434, 175, , 179
ESP10, 292, 314, 377, 410, 433, 177, , 181
ESP10, 292, 319, 376, 413, 432, 179, , 183
ESP10, 292, 318, 374, 412, 431, 181, , 185
ESP10, 298, 326, 377, 417, 435, 184, , 188
ESP10, 297, 327, 375, 415, 433, 186, , 190
ESP10, 300, 333, 378, 419, 436, 188, , 192
ESP10, 299, 331, 376, 418, 434, 190, , 194
ESP10, 299, 330, 375, 418, 432, 192, , 196
ESP10, 300, 332, 375, 420, 433, 194, , 198
ESP10, 292, 326, 367, 412, 425, 196, , 200
ESP10, 301, 333, 374, 419, 431, 199, , 203
ESP10, 306, 338, 379, 422, 437, 201, , 205
ESP10, 305, 336, 377, 420, 440, 203, , 207
ESP10, 296, 329, 372, 412, 432, 205, , 209
ESP10, 305, 341, 384, 420, 442, 207, , 211
ESP10, 302, 339, 380, 417, 440, 209, , 213
ESP10, 308, 345, 387, 423, 448, 211, , 215
ESP10, 309, 350, 389, 424, 453, 214, , 218
ESP10, 309, 352, 389, 424, 454, 216, , 220
ESP10, 302, 348, 383, 418, 447, 218, , 222
ESP10, 290, 332, 370, 403, 434, 220, , 224
ESP10, 287, 329, 366, 400, 435, 222, , 226
ESP10, 286, 330, 363, 400, 436, 224, , 228
ESP10, 291, 335, 368, 404, 446, 226, , 230
ESP10, 292, 337, 368, 406, 447, 229, , 233
ESP10, 294, 339, 369, 407, 447, 231, , 235
ESP10, 288, 335, 364, 401, 442, 233, , 237
ESP10, 288, 336, 363, 401, 443, 235, , 239
ESP10, 287, 336, 363, 401, 443, 237, , 241
ESP10, 285, 334, 367, 401, 442, 239, , 243
ESP10, 295, 346, 379, 412, 452, 241, , 245
ESP10, 293, 345, 377, 412, 450, 244, , 248
ESP10, 300, 352, 386, 418, 456, 246, , 250
ESP10, 301, 352, 389, 417, 456, 248, , 252
ESP10, 298, 348, 385, 413, 453, 250, , 254
ESP10, 293, 343, 381, 406, 447, 252, , 256
ESP10, 297, 345, 386, 409, 451, 254, , 258
ESP10, 301, 349, 390, 414, 454, 256, , 260
ESP10, 300, 352, 390, 415, 454, 259, , 263
ESP10, 303, 354, 394, 416, 455, 261, , 265
ESP10, 308, 358, 401, 420, 458, 263, , 267
ESP10, 303, 354, 395, 416, 452, 265, , 269
ESP10, 300, 349, 390, 415, 447, 267, , 271
ESP10, 302, 346, 388, 413, 445, 269, , 273
ESP10, 302, 346, 386, 413, 445, 271, , 275
ESP10, 299, 343, 382, 409, 442, 273, , 277
ESP10, 299, 346, 381, 410, 441, 276, , 280
ESP10, 302, 349, 382, 412, 445, 278, , 282
ESP10, 304, 350, 384, 415, 447, 280, , 284
ESP10, 305, 352, 387, 416, 449, 282, , 286
ESP10, 306, 354, 390, 416, 451, 284, , 288
ESP10, 306, 354, 390, 415, 452, 286, , 290
ESP10, 308, 355, 393, 417, 453, 288, , 292
ESP10, 311, 354, 392, 416, 455, 291, , 295
ESP10, 314, 357, 396, 420, 460, 293, , 297
ESP10, 312, 356, 395, 418, 458, 295, , 299
ESP10, 311, 353, 393, 415, 455, 297, , 301
ESP10, 316, 356, 399, 422, 458, 299, , 303
ESP10, 321, 360, 402, 424, 459, 301, , 305
ESP10, 330, 365, 407, 429, 463, 303, , 307
ESP10, 331, 365, 406, 428, 462, 306, , 310
ESP10, 334, 368, 408, 430, 464, 308, , 312
ESP10, 335, 371, 411, 433, 464, 310, , 314
ESP10, 337, 374, 414, 438, 466, 312, , 316
ESP10, 336, 372, 411, 438, 464, 314, , 318
ESP10, 337, 376, 412, 439, 466, 316, , 320
ESP10, 340, 379, 414, 443, 467, 318, , 322
ESP10, 338, 380, 413, 440, 465, 321, , 325
ESP10, 340, 381, 415, 440, 465, 323, , 327
ESP10, 342, 382, 417, 442, 466, 325, , 329
ESP10, 347, 389, 424, 448, 470, 327, , 331
ESP10, 350, 392, 429, 451, 472, 329, , 333
ESP10, 350, 391, 428, 447, 470, 331, , 335
ESP10, 350, 390, 426, 446, 472, 333, , 337
ESP10, 355, 393, 429, 449, 474, 336, , 340
ESP10, 352, 390, 428, 446, 472, 338, , 342
ESP10, 350, 387, 426, 444, 472, 340, , 344
ESP10, 356, 391, 434, 450, 475, 342, , 346
ESP10, 355, 387, 430, 447, 472, 344, , 348
ESP10, 358, 386, 429, 447, 471, 346, , 350
ESP10, 359, 384, 429, 448, 471, 348, , 352
ESP10, 361, 386, 430, 451, 475, 351, , 355
ESP10, 352, 377, 423, 441, 467, 353, , 357
ESP10, 355, 380, 426, 445, 469, 355, , 359
ESP10, 353, 380, 425, 443, 467, 357, , 361
ESP10, 347, 374, 421, 435, 461, 359, , 363
ESP10, 352, 379, 424, 441, 467, 361, , 365
ESP10, 356, 385, 429, 448, 474, 363, , 367
ESP10, 342, 370, 414, 435, 459, 366, , 370
ESP10, 346, 377, 420, 441, 465, 368, , 372
ESP10, 341, 374, 415, 439, 461, 370, , 374
ESP10, 345, 380, 420, 443, 468, 372, , 376
ESP10, 346, 381, 420, 445, 468, 374, , 378
ESP10, 351, 387, 429, 454, 473, 376, , 380
ESP10, 356, 394, 433, 460, 478, 378, , 382
ESP10, 360, 395, 434, 460, 478, 381, , 385
ESP10, 361, 392, 433, 457, 474, 383, , 387
ESP10, 358, 388, 431, 454, 472, 385, , 389
ESP10, 359, 387, 429, 452, 470, 387, , 391
ESP10, 360, 384, 430, 451, 471, 389, , 393
ESP10, 362, 386, 432, 451, 473, 391, , 395
ESP10, 358, 386, 435, 449, 470, 393, , 397
ESP10, 357, 385, 435, 450, 468, 396, , 400
ESP10, 346, 372, 422, 438, 454, 398, , 402
ESP10, 341, 367, 418, 433, 450, 400, , 404
ESP10, 338, 361, 412, 428, 446, 402, , 406
ESP10, 336, 361, 409, 427, 444, 404, , 408
ESP10, 331, 358, 403, 422, 440, 406, , 410
ESP10, 328, 355, 399, 419, 438, 408, , 412
ESP10, 334, 360, 403, 424, 441, 410, , 414
ESP10, 335, 358, 400, 421, 440, 413, , 417
ESP10, 329, 351, 393, 415, 433, 415, , 419
ESP10, 340, 365, 405, 427, 445, 417, , 421
ESP10, 341, 362, 405, 426, 447, 419, , 423
ESP10, 344, 361, 406, 426, 448, 421, , 425
ESP10, 337, 355, 400, 419, 443, 423, , 427
ESP10, 334, 352, 398, 416, 439, 425, , 429
ESP10, 339, 360, 404, 422, 442, 428, , 432
ESP10, 343, 370, 407, 425, 445, 430, , 434
ESP10, 347, 374, 407, 425, 445, 432, , 436
ESP10, 349, 376, 407, 426, 446, 434, , 438
ESP10, 354, 379, 410, 428, 450, 436, , 440
ESP10, 355, 379, 412, 430, 451, 438, , 442
ESP10, 350, 371, 405, 424, 442, 440, , 444
ESP10, 352, 370, 402, 422, 442, 443, , 447
ESP10, 357, 378, 410, 427, 449, 445, , 449
ESP10, 353, 373, 404, 420, 442, 447, , 451
ESP10, 364, 379, 409, 427, 448, 449, , 453
ESP10, 365, 378, 406, 428, 446, 451, , 455
ESP10, 366, 378, 407, 427, 446, 453, , 457
ESP10, 370, 384, 412, 434, 450, 455, , 459
ESP10, 371, 391, 414, 438, 451, 458, , 462
ESP10, 371, 391, 415, 439, 450, 460, , 464
ESP10, 378, 397, 422, 446, 458, 462, , 466
ESP10, 379, 399, 425, 449, 462, 464, , 468
ESP10, 379, 401, 426, 450, 465, 466, , 470
ESP10, 391, 411, 436, 457, 474, 468, , 472
ESP10, 394, 414, 438, 459, 475, 470, , 474
ESP10, 389, 409, 432, 453, 470, 473, , 477
ESP10, 386, 406, 427, 450, 466, 475, , 479
ESP10, 388, 407, 427, 449, 465, 477, , 481
ESP10, 383, 402, 421, 446, 460, 479, , 483
ESP10, 385, 402, 420, 445, 459, 481, , 485
ESP10, 394, 405, 422, 447, 460, 483, , 487
ESP10, 394, 407, 425, 447, 459, 485, , 489
ESP10, 398, 413, 431, 452, 462, 488, , 492
ESP10, 405, 414, 434, 454, 465, 490, , 494
ESP10, 409, 415, 436, 453, 466, 492, , 496
ESP10, 409, 418, 435, 453, 465, 494, , 498
ESP10, 407, 420, 433, 453, 464, 496, , 500
ESP10, 410, 425, 435, 454, 465, 498, , 502
ESP10, 408, 423, 437, 453, 464, 500, , 504
ESP10, 410, 427, 439, 454, 466, 503, , 507
ESP10, 415, 430, 441, 456, 467, 505, , 509
ESP10, 416, 432, 443, 456, 467, 507, , 511
ESP10, 416, 435, 444, 457, 467, 509, , 513
ESP10, 413, 431, 440, 454, 463, 511, , 515
ESP10, 414, 434, 441, 455, 464, 513, , 517
ESP10, 415, 436, 445, 456, 464, 515, , 519
ESP10, 414, 436, 447, 455, 464, 518, , 522
ESP10, 414, 436, 446, 455, 464, 520, , 524
ESP10, 416, 437, 448, 458, 465, 522, , 526
ESP10, 416, 437, 448, 460, 465, 524, , 528
ESP10, 416, 437, 448, 461, 466, 526, , 530
ESP10, 419, 439, 449, 463, 467, 528, , 532
ESP10, 422, 442, 456, 465, 469, 530, , 534
ESP10, 424, 442, 457, 465, 468, 533, , 537
ESP10, 425, 442, 459, 465, 469, 535, , 539
ESP10, 425, 441, 458, 466, 469, 537, , 541
ESP10, 428, 441, 460, 467, 470, 539, , 543
ESP10, 432, 445, 464, 472, 475, 541, , 545
ESP10, 434, 448, 466, 475, 478, 543, , 547
ESP10, 434, 450, 464, 473, 476, 545, , 549
ESP10, 434, 448, 461, 469, 473, 547, , 551
ESP10, 427, 442, 454, 463, 468, 550, , 554
ESP10, 433, 447, 458, 467, 471, 552, , 556
ESP10, 432, 448, 458, 467, 470, 554, , 558
ESP10, 431, 445, 457, 464, 468, 556, , 560
ESP10, 437, 448, 460, 467, 470, 558, , 562
ESP10, 441, 453, 464, 470, 473, 560, , 564
ESP10, 435, 450, 460, 466, 469, 562, , 566
ESP10, 440, 452, 461, 468, 471, 565, , 569
ESP10, 439, 451, 460, 467, 470, 567, , 571
ESP10, 446, 454, 463, 469, 471, 569, , 573
ESP10, 450, 457, 465, 471, 473, 571, , 575
ESP10, 450, 459, 466, 471, 473, 573, , 577
ESP10, 450, 458, 465, 469, 472, 575, , 579
ESP10, 450, 458, 464, 468, 471, 577, , 581
ESP10, 454, 460, 466, 470, 472, 580, , 584
ESP10, 453, 460, 466, 470, 472, 582, , 586
ESP10, 454, 459, 464, 468, 470, 584, , 588
ESP10, 455, 460, 466, 468, 470, 586, , 590
ESP10, 456, 461, 467, 469, 471, 588, , 592
ESP10, 458, 463, 468, 470, 472, 590, , 594
ESP10, 456, 462, 467, 469, 470, 592, , 596
ESP10, 455, 463, 466, 468, 469, 595, , 599
ESP10, 457, 465, 467, 469, 471, 597, , 601
ESP10, 455, 464, 466, 467, 469, 599, , 603
ESP10, 455, 461, 463, 464, 466, 601, , 605
ESP10, 456, 461, 463, 464, 465, 603, , 607
ESP10, 458, 462, 464, 465, 466, 605, , 609
ESP10, 459, 463, 465, 466, 467, 607, , 611
ESP10, 461, 465, 466, 467, 469, 610, , 614
ESP10, 459, 463, 465, 466, 467, 612, , 616
ESP10, 459, 463, 465, 466, 467, 614, , 618
ESP10, 459, 463, 465, 466, 467, 616, , 620
ESP10, 459, 463, 465, 466, 467, 618, , 622
ESP10, 460, 464, 465, 467, 468, 620, , 624
ESP10, 461, 464, 465, 466, 468, 622, , 626
ESP10, 461, 464, 465, 466, 468, 625, , 629
ESP10, 462, 464, 465, 467, 468, 627, , 631
ESP10, 461, 464, 465, 466, 467, 629, , 633
ESP10, 460, 463, 464, 466, 467, 631, , 635
ESP10, 461, 463, 464, 465, 466, 633, , 637
ESP10, 462, 463, 464, 466, 467, 635, , 639
ESP10, 461, 463, 464, 465, 466, 637, , 641
ESP10, 462, 464, 465, 466, 467, 640, , 644
ESP10, 462, 464, 465, 466, 467, 642, , 646
ESP10, 462, 464, 465, 466, 467, 644, , 648
ESP10, 462, 463, 465, 466, 467, 646, , 650
ESP10, 461, 462, 463, 465, 465, 648, , 652
ESP10, 461, 463, 464, 465, 466, 650, , 654
ESP10, 461, 463, 464, 465, 466, 652, , 656
ESP10, 461, 463, 464, 465, 466, 655, , 659
ESP10, 461, 463, 464, 465, 466, 657, , 661
ESP10, 461, 463, 464, 465, 466, 659, , 663
ESP10, 461, 463, 464, 465, 466, 661, , 665
ESP10, 461, 463, 464, 465, 466, 663, , 667
ESP10, 461, 463, 464, 465, 466, 665, , 669
ESP10, 461, 463, 464, 465, 467, 667, , 671
ESP10, 461, 463, 464, 465, 467, 670, , 674
ESP10, 461, 463, 464, 465, 466, 672, , 676
ESP10, 460, 463, 464, 465, 466, 674, , 678
ESP10, 460, 462, 463, 465, 466, 676, , 680
ESP10, 460, 462, 463, 464, 465, 678, , 682
ESP10, 461, 462, 463, 464, 466, 680, , 684
ESP10, 461, 462, 464, 465, 466, 682, , 686
ESP10, 461, 462, 464, 465, 466, 684, , 688
ESP10, 462, 464, 465, 466, 467, 687, , 691
ESP10, 462, 463, 464, 465, 467, 689, , 693
ESP10, 462, 463, 464, 465, 467, 691, , 695
ESP10, 462, 464, 465, 466, 467, 693, , 697
ESP10, 462, 463, 464, 465, 466, 695, , 699
ESP10, 462, 464, 465, 466, 467, 697, , 701
ESP10, 462, 464, 465, 466, 467, 699, , 703
ESP10, 462, 463, 465, 465, 467, 702, , 706
ESP10, 462, 464, 465, 466, 467, 704, , 708
ESP10, 462, 464, 465, 466, 467, 706, , 710
ESP10, 462, 464, 465, 466, 467, 708, , 712
ESP10, 463, 464, 465, 466, 467, 710, , 714
ESP10, 461, 463, 464, 465, 466, 712, , 716
ESP10, 462, 463, 465, 465, 466, 714, , 718
ESP10, 462, 464, 465, 466, 466, 717, , 721
ESP10, 462, 464, 465, 466, 466, 719, , 723
ESP10, 462, 463, 465, 465, 466, 721, , 725
ESP10, 463, 464, 465, 466, 467, 723, , 727
ESP10, 463, 464, 465, 466, 467, 725, , 729
ESP10, 463, 464, 465, 466, 467, 727, , 731
ESP10, 463, 464, 465, 466, 467, 729, , 733
ESP10, 463, 464, 465, 466, 467, 732, , 736
ESP10, 463, 464, 465, 466, 467, 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/natural/COKW1N_SQIN.ESPF10.csv
COKW1N_SQIN.ESPF0.csv|2026-08-08
COKW1N_SQIN.ESPF10.csv|2026-08-08
COKW1N_SQIN.ESPFM.csv|2026-08-08
APR-SEP
COWLITZ - NEAR KOSMOS
(
COKW1
)
Forecasts for Water Year
2027
Natural Forecast
ESP with 10 Days QPF
Ensemble:
2026-08-08
Issued:
2026-08-08
Hide Forecast
Forecast
Period
Forecasts Are in KAF
30 Year
Average
(1991-2020)
90 %
50 %
%
Average
10 %
APR-SEP
1053
1496
91
1860
1650
APR-JUL
930
1331
91
1672
1461
APR-AUG
999
1422
91
1782
1566
JAN-SEP
1942
2464
89
3055
2760
JAN-JUL
1810
2248
87
2830
2571
OCT-SEP
2456
3323
92
4119
3608
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/natural/COKW1N_SQIN.ESPF10.csv
COKW1N_SQIN.ESPF0.csv|2026-08-08
COKW1N_SQIN.ESPF10.csv|2026-08-08
COKW1N_SQIN.ESPFM.csv|2026-08-08
APR-SEP
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ESP10,ESPM,ESP0
ESP10,ESPM,ESP0
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