Choose Date:
Archive:
Water Year
Loading...
COLUMBIA - WANAPUM DAM
(
WANW1
)
Forecasts for Water Year
2026
Natural Forecast
ESP with 10 Days QPF
Ensemble:
2026-09-20
Issued:
2026-09-20
Hide Forecast
Forecast
Period
Forecasts Are in KAF
30 Year
Average
(1991-2020)
90 %
50 %
%
Average
10 %
APR-SEP
61912
61912
91
61912
68222
APR-JUL
51934
51934
90
51934
57709
APR-AUG
58259
58259
91
58259
64241
JAN-SEP
76001
76001
98
76001
77881
JAN-JUL
66023
66023
98
66023
67367
OCT-SEP
87768
87768
100
87768
87958
Experimental
HEFS with 15 days EQPF
Ensemble:
2026-09-20
Issued:
2026-09-20
Hide Forecast
APR-SEP
61906
61937
91
62011
68222
APR-JUL
51934
51934
90
51934
57709
APR-AUG
58259
58259
91
58259
64241
JAN-SEP
75995
76025
98
76100
77881
JAN-JUL
66023
66023
98
66023
67367
OCT-SEP
87762
87793
100
87867
87958
Reference
ESP with 0 Days QPF
Ensemble:
2026-09-20
Issued:
2026-09-20
Hide Forecast
APR-SEP
61894
61934
91
62030
68222
APR-JUL
51934
51934
90
51934
57709
APR-AUG
58259
58259
91
58259
64241
JAN-SEP
75983
76023
98
76119
77881
JAN-JUL
66023
66023
98
66023
67367
OCT-SEP
87750
87790
100
87886
87958
Move the mouse over the desired "Forecast Period" to display a graph.
ESP10, 224, 297, 352, 409, 435, 70, , 74
ESP10, 219, 295, 346, 404, 431, 72, , 76
ESP10, 222, 298, 351, 407, 436, 74, , 78
ESP10, 221, 298, 352, 405, 434, 76, , 80
ESP10, 222, 298, 353, 402, 432, 77, , 81
ESP10, 220, 296, 352, 398, 431, 79, , 83
ESP10, 225, 299, 353, 401, 436, 81, , 85
ESP10, 229, 302, 358, 402, 436, 83, , 87
ESP10, 230, 305, 359, 402, 437, 85, , 89
ESP10, 227, 307, 356, 400, 436, 87, , 91
ESP10, 227, 312, 359, 401, 437, 89, , 93
ESP10, 225, 312, 358, 402, 436, 91, , 95
ESP10, 219, 307, 352, 397, 432, 92, , 96
ESP10, 221, 308, 354, 401, 434, 94, , 98
ESP10, 221, 306, 351, 399, 434, 96, , 100
ESP10, 208, 297, 337, 389, 424, 98, , 102
ESP10, 198, 286, 329, 380, 414, 100, , 104
ESP10, 209, 296, 342, 393, 425, 102, , 106
ESP10, 210, 298, 346, 395, 428, 104, , 108
ESP10, 210, 299, 346, 397, 431, 106, , 110
ESP10, 200, 291, 337, 387, 421, 108, , 112
ESP10, 201, 291, 336, 391, 420, 109, , 113
ESP10, 194, 288, 331, 386, 420, 111, , 115
ESP10, 202, 297, 343, 392, 429, 113, , 117
ESP10, 207, 302, 348, 401, 432, 115, , 119
ESP10, 211, 308, 352, 406, 436, 117, , 121
ESP10, 213, 306, 352, 406, 436, 119, , 123
ESP10, 215, 308, 351, 406, 436, 121, , 125
ESP10, 205, 300, 343, 399, 428, 123, , 127
ESP10, 189, 287, 330, 387, 417, 124, , 128
ESP10, 188, 286, 332, 386, 421, 126, , 130
ESP10, 194, 292, 338, 388, 428, 128, , 132
ESP10, 190, 288, 337, 387, 427, 130, , 134
ESP10, 202, 299, 345, 400, 437, 132, , 136
ESP10, 208, 303, 347, 402, 438, 134, , 138
ESP10, 211, 303, 347, 400, 436, 136, , 140
ESP10, 213, 302, 346, 398, 437, 138, , 142
ESP10, 210, 295, 344, 389, 430, 140, , 144
ESP10, 216, 301, 351, 395, 438, 141, , 145
ESP10, 213, 300, 352, 390, 437, 143, , 147
ESP10, 214, 302, 351, 392, 438, 145, , 149
ESP10, 219, 302, 349, 396, 438, 147, , 151
ESP10, 230, 307, 361, 402, 445, 149, , 153
ESP10, 243, 312, 365, 403, 450, 151, , 155
ESP10, 237, 307, 357, 396, 441, 153, , 157
ESP10, 246, 312, 363, 402, 445, 155, , 159
ESP10, 238, 304, 354, 395, 439, 156, , 160
ESP10, 246, 310, 363, 400, 450, 158, , 162
ESP10, 241, 304, 358, 401, 446, 160, , 164
ESP10, 245, 310, 364, 402, 450, 162, , 166
ESP10, 246, 310, 364, 400, 448, 164, , 168
ESP10, 247, 315, 359, 399, 444, 166, , 170
ESP10, 244, 317, 357, 396, 439, 168, , 172
ESP10, 254, 326, 367, 407, 447, 170, , 174
ESP10, 250, 322, 362, 407, 444, 172, , 176
ESP10, 253, 318, 359, 408, 444, 173, , 177
ESP10, 251, 314, 355, 403, 439, 175, , 179
ESP10, 251, 312, 355, 403, 439, 177, , 181
ESP10, 252, 313, 361, 408, 441, 179, , 183
ESP10, 243, 303, 351, 400, 431, 181, , 185
ESP10, 232, 293, 341, 389, 421, 183, , 187
ESP10, 236, 294, 343, 392, 423, 185, , 189
ESP10, 229, 284, 337, 385, 414, 187, , 191
ESP10, 214, 262, 321, 365, 402, 188, , 192
ESP10, 214, 264, 326, 365, 407, 190, , 194
ESP10, 209, 261, 320, 360, 405, 192, , 196
ESP10, 220, 272, 330, 372, 419, 194, , 198
ESP10, 203, 257, 315, 358, 404, 196, , 200
ESP10, 176, 229, 286, 329, 377, 198, , 202
ESP10, 167, 227, 278, 319, 368, 200, , 204
ESP10, 167, 230, 280, 319, 369, 202, , 206
ESP10, 173, 242, 288, 326, 377, 204, , 208
ESP10, 174, 242, 293, 328, 378, 205, , 209
ESP10, 168, 234, 287, 321, 373, 207, , 211
ESP10, 174, 231, 290, 322, 372, 209, , 213
ESP10, 182, 231, 293, 322, 374, 211, , 215
ESP10, 184, 230, 299, 322, 377, 213, , 217
ESP10, 182, 226, 296, 318, 374, 215, , 219
ESP10, 178, 225, 291, 313, 368, 217, , 221
ESP10, 181, 227, 283, 307, 362, 219, , 223
ESP10, 194, 236, 289, 314, 367, 220, , 224
ESP10, 200, 234, 287, 312, 365, 222, , 226
ESP10, 213, 245, 298, 324, 376, 224, , 228
ESP10, 218, 249, 301, 333, 380, 226, , 230
ESP10, 213, 241, 296, 329, 375, 228, , 232
ESP10, 209, 236, 291, 327, 373, 230, , 234
ESP10, 211, 240, 293, 328, 376, 232, , 236
ESP10, 216, 245, 297, 332, 390, 234, , 238
ESP10, 212, 243, 293, 331, 388, 236, , 240
ESP10, 217, 246, 297, 332, 388, 237, , 241
ESP10, 224, 260, 304, 338, 390, 239, , 243
ESP10, 222, 257, 304, 335, 386, 241, , 245
ESP10, 215, 251, 303, 329, 382, 243, , 247
ESP10, 216, 254, 304, 331, 386, 245, , 249
ESP10, 207, 250, 297, 325, 380, 247, , 251
ESP10, 206, 262, 298, 329, 381, 249, , 253
ESP10, 206, 262, 301, 329, 382, 251, , 255
ESP10, 206, 261, 299, 332, 380, 252, , 256
ESP10, 208, 263, 300, 331, 378, 254, , 258
ESP10, 212, 263, 295, 333, 375, 256, , 260
ESP10, 210, 261, 294, 332, 372, 258, , 262
ESP10, 211, 260, 295, 333, 372, 260, , 264
ESP10, 210, 258, 294, 331, 368, 262, , 266
ESP10, 207, 257, 292, 328, 365, 264, , 268
ESP10, 214, 261, 291, 327, 365, 266, , 270
ESP10, 215, 261, 292, 325, 363, 267, , 271
ESP10, 212, 264, 290, 323, 363, 269, , 273
ESP10, 213, 266, 292, 327, 363, 271, , 275
ESP10, 215, 267, 294, 327, 364, 273, , 277
ESP10, 226, 279, 302, 337, 371, 275, , 279
ESP10, 233, 284, 305, 339, 372, 277, , 281
ESP10, 239, 291, 312, 346, 378, 279, , 283
ESP10, 238, 293, 316, 348, 378, 281, , 285
ESP10, 242, 297, 321, 351, 382, 283, , 287
ESP10, 242, 296, 322, 352, 382, 284, , 288
ESP10, 238, 292, 317, 347, 375, 286, , 290
ESP10, 242, 296, 319, 352, 379, 288, , 292
ESP10, 243, 299, 321, 354, 380, 290, , 294
ESP10, 249, 301, 321, 356, 383, 292, , 296
ESP10, 248, 302, 321, 355, 385, 294, , 298
ESP10, 246, 302, 323, 354, 385, 296, , 300
ESP10, 240, 296, 314, 344, 380, 298, , 302
ESP10, 234, 289, 307, 336, 375, 299, , 303
ESP10, 243, 291, 310, 338, 378, 301, , 305
ESP10, 245, 291, 311, 339, 381, 303, , 307
ESP10, 243, 289, 311, 337, 379, 305, , 309
ESP10, 242, 286, 306, 334, 374, 307, , 311
ESP10, 251, 296, 316, 339, 381, 309, , 313
ESP10, 252, 294, 312, 339, 377, 311, , 315
ESP10, 250, 293, 313, 343, 375, 313, , 317
ESP10, 254, 296, 316, 344, 375, 315, , 319
ESP10, 258, 299, 322, 345, 374, 316, , 320
ESP10, 253, 293, 318, 337, 367, 318, , 322
ESP10, 256, 297, 320, 338, 369, 320, , 324
ESP10, 253, 298, 317, 338, 366, 322, , 326
ESP10, 241, 286, 303, 328, 352, 324, , 328
ESP10, 243, 286, 303, 329, 352, 326, , 330
ESP10, 249, 293, 311, 335, 358, 328, , 332
ESP10, 237, 281, 302, 323, 346, 330, , 334
ESP10, 249, 289, 314, 332, 357, 331, , 335
ESP10, 245, 284, 307, 327, 350, 333, , 337
ESP10, 253, 290, 313, 332, 357, 335, , 339
ESP10, 254, 287, 310, 331, 355, 337, , 341
ESP10, 266, 294, 317, 340, 363, 339, , 343
ESP10, 271, 296, 318, 343, 365, 341, , 345
ESP10, 275, 298, 320, 345, 367, 343, , 347
ESP10, 275, 299, 323, 344, 366, 345, , 349
ESP10, 270, 296, 316, 339, 361, 347, , 351
ESP10, 265, 292, 313, 332, 356, 348, , 352
ESP10, 258, 284, 306, 322, 346, 350, , 354
ESP10, 262, 288, 307, 323, 346, 352, , 356
ESP10, 260, 283, 305, 321, 341, 354, , 358
ESP10, 253, 277, 297, 313, 332, 356, , 360
ESP10, 248, 271, 296, 307, 328, 358, , 362
ESP10, 242, 267, 289, 301, 323, 360, , 364
ESP10, 241, 269, 285, 303, 321, 362, , 366
ESP10, 231, 259, 272, 293, 310, 363, , 367
ESP10, 234, 260, 273, 295, 312, 365, , 369
ESP10, 216, 245, 257, 278, 298, 367, , 371
ESP10, 233, 261, 274, 292, 311, 369, , 373
ESP10, 232, 262, 275, 292, 312, 371, , 375
ESP10, 227, 258, 270, 288, 308, 373, , 377
ESP10, 225, 253, 262, 283, 300, 375, , 379
ESP10, 230, 258, 268, 289, 306, 377, , 381
ESP10, 227, 253, 263, 284, 305, 379, , 383
ESP10, 224, 248, 260, 278, 302, 380, , 384
ESP10, 219, 243, 255, 272, 299, 382, , 386
ESP10, 221, 245, 258, 276, 301, 384, , 388
ESP10, 219, 243, 257, 278, 298, 386, , 390
ESP10, 223, 243, 258, 279, 300, 388, , 392
ESP10, 225, 242, 257, 276, 297, 390, , 394
ESP10, 232, 245, 261, 278, 301, 392, , 396
ESP10, 231, 244, 259, 275, 298, 394, , 398
ESP10, 221, 237, 251, 268, 289, 395, , 399
ESP10, 217, 235, 250, 266, 286, 397, , 401
ESP10, 221, 240, 256, 273, 292, 399, , 403
ESP10, 220, 242, 256, 274, 292, 401, , 405
ESP10, 222, 246, 261, 278, 296, 403, , 407
ESP10, 224, 251, 265, 284, 300, 405, , 409
ESP10, 228, 255, 270, 288, 303, 407, , 411
ESP10, 236, 261, 276, 297, 309, 409, , 413
ESP10, 238, 264, 276, 297, 310, 411, , 415
ESP10, 237, 264, 276, 295, 309, 412, , 416
ESP10, 241, 270, 283, 299, 315, 414, , 418
ESP10, 239, 269, 286, 301, 315, 416, , 420
ESP10, 236, 266, 284, 300, 315, 418, , 422
ESP10, 237, 268, 284, 302, 315, 420, , 424
ESP10, 239, 274, 290, 305, 318, 422, , 426
ESP10, 238, 273, 287, 303, 317, 424, , 428
ESP10, 234, 267, 280, 297, 309, 426, , 430
ESP10, 231, 264, 278, 294, 305, 427, , 431
ESP10, 230, 264, 278, 294, 305, 429, , 433
ESP10, 234, 268, 283, 300, 311, 431, , 435
ESP10, 239, 271, 285, 302, 313, 433, , 437
ESP10, 237, 273, 282, 300, 309, 435, , 439
ESP10, 246, 280, 287, 306, 315, 437, , 441
ESP10, 249, 277, 286, 304, 313, 439, , 443
ESP10, 252, 280, 290, 307, 315, 441, , 445
ESP10, 248, 274, 287, 303, 310, 443, , 447
ESP10, 250, 276, 290, 306, 312, 444, , 448
ESP10, 252, 278, 293, 308, 315, 446, , 450
ESP10, 254, 280, 295, 311, 318, 448, , 452
ESP10, 257, 282, 298, 315, 320, 450, , 454
ESP10, 266, 291, 307, 323, 331, 452, , 456
ESP10, 266, 289, 306, 321, 331, 454, , 458
ESP10, 268, 291, 307, 322, 332, 456, , 460
ESP10, 268, 294, 306, 321, 333, 458, , 462
ESP10, 266, 292, 305, 319, 332, 459, , 463
ESP10, 268, 298, 309, 321, 333, 461, , 465
ESP10, 266, 297, 309, 320, 332, 463, , 467
ESP10, 267, 298, 309, 320, 332, 465, , 469
ESP10, 273, 302, 313, 326, 337, 467, , 471
ESP10, 276, 306, 318, 329, 341, 469, , 473
ESP10, 277, 306, 319, 332, 341, 471, , 475
ESP10, 278, 305, 319, 332, 340, 473, , 477
ESP10, 280, 304, 318, 331, 337, 475, , 479
ESP10, 284, 304, 321, 333, 337, 476, , 480
ESP10, 283, 304, 321, 333, 338, 478, , 482
ESP10, 283, 302, 320, 332, 340, 480, , 484
ESP10, 284, 304, 320, 332, 340, 482, , 486
ESP10, 286, 305, 321, 333, 340, 484, , 488
ESP10, 287, 304, 318, 332, 338, 486, , 490
ESP10, 288, 304, 317, 329, 335, 488, , 492
ESP10, 287, 305, 318, 329, 336, 490, , 494
ESP10, 285, 302, 316, 328, 333, 491, , 495
ESP10, 288, 301, 319, 328, 336, 493, , 497
ESP10, 290, 299, 319, 327, 335, 495, , 499
ESP10, 291, 302, 321, 329, 336, 497, , 501
ESP10, 294, 306, 322, 332, 339, 499, , 503
ESP10, 299, 310, 327, 336, 344, 501, , 505
ESP10, 294, 306, 324, 331, 339, 503, , 507
ESP10, 292, 304, 320, 329, 336, 505, , 509
ESP10, 296, 310, 321, 328, 336, 507, , 511
ESP10, 292, 308, 319, 326, 332, 508, , 512
ESP10, 293, 308, 318, 327, 333, 510, , 514
ESP10, 289, 303, 317, 322, 330, 512, , 516
ESP10, 290, 303, 315, 322, 329, 514, , 518
ESP10, 293, 305, 314, 323, 329, 516, , 520
ESP10, 295, 307, 318, 325, 333, 518, , 522
ESP10, 289, 300, 312, 319, 326, 520, , 524
ESP10, 292, 301, 314, 322, 328, 522, , 526
ESP10, 292, 300, 313, 321, 328, 523, , 527
ESP10, 293, 300, 313, 321, 329, 525, , 529
ESP10, 295, 302, 315, 324, 330, 527, , 531
ESP10, 295, 302, 312, 324, 329, 529, , 533
ESP10, 296, 305, 315, 323, 330, 531, , 535
ESP10, 302, 311, 319, 328, 335, 533, , 537
ESP10, 305, 315, 322, 332, 337, 535, , 539
ESP10, 305, 316, 322, 332, 339, 537, , 541
ESP10, 304, 315, 324, 331, 337, 539, , 543
ESP10, 311, 324, 331, 338, 345, 540, , 544
ESP10, 312, 325, 334, 341, 345, 542, , 546
ESP10, 320, 330, 339, 346, 351, 544, , 548
ESP10, 321, 327, 337, 344, 349, 546, , 550
ESP10, 323, 328, 336, 344, 348, 548, , 552
ESP10, 325, 331, 339, 346, 349, 550, , 554
ESP10, 326, 332, 340, 347, 351, 552, , 556
ESP10, 324, 331, 338, 345, 350, 554, , 558
ESP10, 324, 331, 339, 345, 349, 555, , 559
ESP10, 327, 334, 342, 347, 352, 557, , 561
ESP10, 328, 337, 343, 350, 353, 559, , 563
ESP10, 326, 335, 342, 348, 352, 561, , 565
ESP10, 327, 338, 344, 349, 354, 563, , 567
ESP10, 323, 333, 340, 345, 352, 565, , 569
ESP10, 334, 342, 349, 353, 360, 567, , 571
ESP10, 334, 342, 348, 353, 359, 569, , 573
ESP10, 334, 343, 348, 353, 358, 571, , 575
ESP10, 330, 338, 345, 349, 354, 572, , 576
ESP10, 331, 339, 345, 348, 354, 574, , 578
ESP10, 327, 336, 342, 345, 350, 576, , 580
ESP10, 332, 339, 345, 349, 354, 578, , 582
ESP10, 336, 342, 348, 353, 356, 580, , 584
ESP10, 336, 340, 347, 351, 354, 582, , 586
ESP10, 336, 341, 347, 351, 353, 584, , 588
ESP10, 335, 340, 346, 351, 353, 586, , 590
ESP10, 337, 343, 349, 353, 355, 587, , 591
ESP10, 345, 348, 352, 356, 358, 589, , 593
ESP10, 345, 348, 353, 356, 358, 591, , 595
ESP10, 346, 348, 352, 356, 357, 593, , 597
ESP10, 346, 349, 352, 355, 357, 595, , 599
ESP10, 346, 349, 353, 356, 358, 597, , 601
ESP10, 346, 350, 354, 356, 357, 599, , 603
ESP10, 346, 349, 353, 356, 357, 601, , 605
ESP10, 345, 349, 352, 355, 356, 602, , 606
ESP10, 343, 348, 352, 354, 355, 604, , 608
ESP10, 345, 350, 353, 355, 357, 606, , 610
ESP10, 344, 350, 353, 355, 356, 608, , 612
ESP10, 345, 350, 353, 355, 356, 610, , 614
ESP10, 346, 351, 353, 355, 356, 612, , 616
ESP10, 347, 351, 353, 356, 357, 614, , 618
ESP10, 347, 351, 353, 356, 357, 616, , 620
ESP10, 346, 351, 353, 355, 356, 618, , 622
ESP10, 346, 351, 353, 355, 356, 619, , 623
ESP10, 347, 351, 353, 355, 356, 621, , 625
ESP10, 347, 351, 353, 355, 356, 623, , 627
ESP10, 347, 351, 353, 355, 356, 625, , 629
ESP10, 348, 351, 354, 356, 357, 627, , 631
ESP10, 349, 352, 354, 356, 357, 629, , 633
ESP10, 349, 352, 354, 356, 356, 631, , 635
ESP10, 351, 354, 355, 358, 359, 633, , 637
ESP10, 351, 354, 356, 357, 359, 634, , 638
ESP10, 350, 353, 355, 357, 358, 636, , 640
ESP10, 351, 354, 355, 357, 358, 638, , 642
ESP10, 350, 353, 355, 356, 357, 640, , 644
ESP10, 351, 354, 355, 357, 357, 642, , 646
ESP10, 352, 354, 356, 357, 358, 644, , 648
ESP10, 351, 354, 355, 356, 357, 646, , 650
ESP10, 353, 354, 356, 357, 358, 648, , 652
ESP10, 352, 354, 356, 356, 357, 650, , 654
ESP10, 354, 355, 356, 357, 359, 651, , 655
ESP10, 352, 354, 355, 357, 358, 653, , 657
ESP10, 352, 354, 356, 357, 358, 655, , 659
ESP10, 351, 354, 355, 356, 357, 657, , 661
ESP10, 352, 354, 355, 356, 357, 659, , 663
ESP10, 353, 355, 356, 357, 358, 661, , 665
ESP10, 355, 357, 358, 359, 360, 663, , 667
ESP10, 354, 356, 357, 358, 359, 665, , 669
ESP10, 354, 356, 357, 357, 359, 666, , 670
ESP10, 352, 354, 355, 356, 357, 668, , 672
ESP10, 352, 354, 355, 356, 357, 670, , 674
ESP10, 353, 355, 356, 356, 357, 672, , 676
ESP10, 353, 355, 356, 357, 357, 674, , 678
ESP10, 354, 355, 356, 357, 357, 676, , 680
ESP10, 354, 355, 356, 357, 357, 678, , 682
ESP10, 354, 355, 356, 357, 357, 680, , 684
ESP10, 354, 356, 357, 357, 358, 682, , 686
ESP10, 354, 356, 356, 357, 357, 683, , 687
ESP10, 354, 355, 356, 357, 357, 685, , 689
ESP10, 354, 355, 356, 357, 357, 687, , 691
ESP10, 352, 354, 355, 356, 356, 689, , 693
ESP10, 353, 354, 355, 356, 356, 691, , 695
ESP10, 353, 354, 355, 355, 356, 693, , 697
ESP10, 352, 354, 355, 355, 355, 695, , 699
ESP10, 352, 354, 354, 355, 355, 697, , 701
ESP10, 352, 354, 354, 354, 355, 698, , 702
ESP10, 353, 354, 355, 355, 356, 700, , 704
ESP10, 354, 354, 355, 355, 356, 702, , 706
ESP10, 352, 353, 354, 354, 354, 704, , 708
ESP10, 354, 354, 355, 355, 355, 706, , 710
ESP10, 354, 355, 355, 355, 355, 708, , 712
ESP10, 354, 354, 355, 355, 355, 710, , 714
ESP10, 353, 354, 354, 354, 355, 712, , 716
ESP10, 354, 354, 354, 354, 355, 714, , 718
ESP10, 353, 354, 354, 354, 354, 715, , 719
ESP10, 353, 353, 354, 354, 354, 717, , 721
ESP10, 353, 353, 354, 354, 354, 719, , 723
ESP10, 353, 353, 353, 353, 354, 721, , 725
ESP10, 353, 353, 353, 354, 354, 723, , 727
ESP10, 353, 353, 353, 353, 353, 725, , 729
ESP10, 353, 353, 353, 353, 353, 727, , 731
ESP10, 353, 353, 353, 353, 353, 729, , 733
ESP10, 353, 353, 353, 353, 353, 730, , 734
ESP10, 353, 353, 353, 353, 353, 732, , 736
ESP10, 353, 353, 353, 353, 353, 734, , 738
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/natural/WANW1N_SQIN.ESPF10.csv
WANW1N_SQIN.ESPF0.csv|2026-09-20
WANW1N_SQIN.ESPF10.csv|2026-09-20
WANW1N_SQIN.ESPFM.csv|2026-09-20
APR-SEP
COLUMBIA - WANAPUM DAM
(
WANW1
)
Forecasts for Water Year
2027
Natural Forecast
ESP with 10 Days QPF
Ensemble:
2026-09-20
Issued:
2026-09-20
Hide Forecast
Forecast
Period
Forecasts Are in KAF
30 Year
Average
(1991-2020)
90 %
50 %
%
Average
10 %
APR-SEP
52542
64842
95
84331
68222
APR-JUL
41588
51814
90
68186
57709
APR-AUG
48536
59967
93
78819
64241
JAN-SEP
58914
72408
93
94502
77881
JAN-JUL
49053
59420
88
77354
67367
OCT-SEP
66719
80715
92
104671
87958
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/WANW1N_SQIN.ESPF10.csv
WANW1N_SQIN.ESPF0.csv|2026-09-20
WANW1N_SQIN.ESPF10.csv|2026-09-20
WANW1N_SQIN.ESPFM.csv|2026-09-20
APR-SEP
Commerce Home
|
NOAA
|
NWS Organization
|
NWRFC Site Map
|
Search
Freedom of Information Act
|
Privacy Policy
|
Information Quality
|
USA.gov
|
Career Opportunities
#FFF68F
#33CCFF
#404040
#660066
#F00007
#66CCFF
ESP10,ESPM,ESP0
ESP10,ESPM,ESP0
Last Forecast
