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Archive:
Water Year
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COLUMBIA - WELLS DAM
(
WELW1
)
Forecasts for Water Year
2026
Natural Forecast
ESP with 10 Days QPF
Ensemble:
2026-05-01
Issued:
2026-05-01
Hide Forecast
Forecast
Period
Forecasts Are in KAF
30 Year
Average
(1991-2020)
90 %
50 %
%
Average
10 %
APR-SEP
62251
65554
100
71299
65328
APR-JUL
50003
52734
96
57374
55110
JAN-SEP
75162
78465
105
84210
74438
JAN-JUL
62914
65645
102
70285
64220
OCT-SEP
85666
88969
106
94713
83937
Experimental
HEFS with 15 days EQPF
Ensemble:
2026-05-01
Issued:
2026-05-01
Hide Forecast
APR-SEP
63187
66651
102
72361
65328
APR-JUL
51450
54307
99
58836
55110
JAN-SEP
76098
79562
107
85273
74438
JAN-JUL
64361
67218
105
71747
64220
OCT-SEP
86602
90066
107
95776
83937
Reference
ESP with 0 Days QPF
Ensemble:
2026-05-01
Issued:
2026-05-01
Hide Forecast
APR-SEP
64013
67363
103
73053
65328
APR-JUL
51141
53937
98
58861
55110
JAN-SEP
76925
80274
108
85964
74438
JAN-JUL
64052
66848
104
71772
64220
OCT-SEP
87428
90777
108
96468
83937
Move the mouse over the desired "Forecast Period" to display a graph.
ESP10, 229, 298, 352, 406, 435, 71, , 75
ESP10, 224, 295, 347, 402, 430, 74, , 78
ESP10, 227, 299, 352, 404, 435, 77, , 81
ESP10, 226, 301, 353, 402, 434, 81, , 85
ESP10, 226, 302, 353, 399, 431, 84, , 88
ESP10, 224, 300, 352, 398, 433, 87, , 91
ESP10, 229, 304, 353, 400, 438, 90, , 94
ESP10, 233, 307, 358, 401, 439, 93, , 97
ESP10, 234, 308, 359, 402, 440, 96, , 100
ESP10, 233, 310, 357, 401, 439, 99, , 103
ESP10, 233, 312, 359, 402, 440, 102, , 106
ESP10, 232, 312, 359, 403, 439, 106, , 110
ESP10, 226, 306, 352, 398, 435, 109, , 113
ESP10, 228, 309, 355, 402, 437, 112, , 116
ESP10, 228, 306, 353, 400, 437, 115, , 119
ESP10, 215, 295, 339, 387, 428, 118, , 122
ESP10, 205, 285, 329, 379, 417, 121, , 125
ESP10, 216, 295, 343, 389, 429, 124, , 128
ESP10, 216, 296, 348, 392, 431, 127, , 131
ESP10, 215, 296, 349, 395, 434, 131, , 135
ESP10, 205, 288, 342, 385, 425, 134, , 138
ESP10, 206, 287, 341, 393, 424, 137, , 141
ESP10, 199, 288, 335, 388, 424, 140, , 144
ESP10, 207, 298, 347, 394, 432, 143, , 147
ESP10, 212, 302, 351, 400, 435, 146, , 150
ESP10, 216, 314, 355, 406, 439, 149, , 153
ESP10, 219, 315, 356, 405, 440, 153, , 157
ESP10, 219, 314, 356, 406, 440, 156, , 160
ESP10, 209, 303, 347, 397, 432, 159, , 163
ESP10, 194, 289, 333, 384, 421, 162, , 166
ESP10, 193, 288, 337, 385, 425, 165, , 169
ESP10, 198, 292, 341, 389, 432, 168, , 172
ESP10, 195, 290, 340, 388, 431, 171, , 175
ESP10, 206, 302, 348, 397, 440, 174, , 178
ESP10, 215, 306, 350, 398, 441, 178, , 182
ESP10, 215, 306, 350, 398, 440, 181, , 185
ESP10, 217, 305, 350, 396, 440, 184, , 188
ESP10, 214, 295, 347, 388, 433, 187, , 191
ESP10, 221, 301, 353, 393, 440, 190, , 194
ESP10, 217, 302, 355, 391, 440, 193, , 197
ESP10, 221, 304, 355, 391, 441, 196, , 200
ESP10, 225, 304, 353, 395, 439, 199, , 203
ESP10, 235, 311, 362, 401, 445, 203, , 207
ESP10, 248, 317, 366, 402, 450, 206, , 210
ESP10, 241, 312, 358, 396, 441, 209, , 213
ESP10, 250, 316, 364, 400, 445, 212, , 216
ESP10, 242, 306, 356, 395, 440, 215, , 219
ESP10, 250, 312, 365, 399, 450, 218, , 222
ESP10, 245, 306, 361, 398, 446, 221, , 225
ESP10, 248, 309, 366, 399, 450, 225, , 229
ESP10, 251, 312, 365, 398, 449, 228, , 232
ESP10, 251, 318, 361, 397, 445, 231, , 235
ESP10, 248, 319, 360, 395, 441, 234, , 238
ESP10, 257, 327, 369, 406, 448, 237, , 241
ESP10, 253, 323, 364, 405, 444, 240, , 244
ESP10, 256, 320, 361, 405, 445, 243, , 247
ESP10, 254, 315, 356, 400, 440, 246, , 250
ESP10, 254, 313, 355, 402, 439, 250, , 254
ESP10, 255, 315, 362, 408, 440, 253, , 257
ESP10, 246, 303, 353, 398, 429, 256, , 260
ESP10, 235, 294, 343, 389, 419, 259, , 263
ESP10, 238, 295, 344, 392, 423, 262, , 266
ESP10, 232, 286, 338, 384, 415, 265, , 269
ESP10, 218, 263, 320, 366, 403, 268, , 272
ESP10, 219, 267, 325, 366, 408, 272, , 276
ESP10, 214, 264, 319, 360, 405, 275, , 279
ESP10, 224, 274, 329, 370, 418, 278, , 282
ESP10, 208, 260, 314, 356, 404, 281, , 285
ESP10, 180, 232, 285, 328, 377, 284, , 288
ESP10, 171, 227, 278, 318, 368, 287, , 291
ESP10, 171, 234, 280, 317, 371, 290, , 294
ESP10, 177, 246, 286, 324, 379, 293, , 297
ESP10, 178, 247, 291, 326, 381, 297, , 301
ESP10, 172, 238, 284, 320, 375, 300, , 304
ESP10, 177, 236, 290, 319, 373, 303, , 307
ESP10, 185, 236, 294, 320, 375, 306, , 310
ESP10, 186, 236, 298, 320, 378, 309, , 313
ESP10, 184, 232, 296, 317, 375, 312, , 316
ESP10, 181, 229, 289, 313, 369, 315, , 319
ESP10, 186, 230, 281, 309, 362, 318, , 322
ESP10, 198, 238, 287, 315, 367, 322, , 326
ESP10, 203, 237, 286, 314, 367, 325, , 329
ESP10, 215, 250, 298, 326, 378, 328, , 332
ESP10, 220, 254, 300, 330, 382, 331, , 335
ESP10, 215, 246, 296, 327, 377, 334, , 338
ESP10, 212, 241, 292, 328, 376, 337, , 341
ESP10, 214, 244, 294, 328, 377, 340, , 344
ESP10, 218, 247, 297, 331, 389, 344, , 348
ESP10, 214, 247, 292, 328, 387, 347, , 351
ESP10, 219, 250, 295, 330, 388, 350, , 354
ESP10, 226, 262, 303, 335, 389, 353, , 357
ESP10, 225, 260, 304, 332, 385, 356, , 360
ESP10, 218, 254, 302, 326, 382, 359, , 363
ESP10, 219, 259, 303, 328, 387, 362, , 366
ESP10, 210, 252, 295, 322, 381, 365, , 369
ESP10, 208, 263, 296, 325, 382, 369, , 373
ESP10, 210, 263, 299, 327, 383, 372, , 376
ESP10, 209, 261, 296, 329, 381, 375, , 379
ESP10, 211, 261, 296, 329, 379, 378, , 382
ESP10, 214, 261, 291, 329, 375, 381, , 385
ESP10, 212, 258, 290, 331, 372, 384, , 388
ESP10, 213, 257, 292, 331, 372, 387, , 391
ESP10, 213, 255, 290, 330, 369, 390, , 394
ESP10, 210, 255, 290, 326, 366, 394, , 398
ESP10, 215, 257, 290, 325, 365, 397, , 401
ESP10, 215, 260, 293, 324, 364, 400, , 404
ESP10, 216, 263, 292, 322, 363, 403, , 407
ESP10, 217, 265, 293, 326, 364, 406, , 410
ESP10, 218, 268, 294, 325, 363, 409, , 413
ESP10, 229, 276, 301, 334, 370, 412, , 416
ESP10, 235, 281, 304, 338, 371, 416, , 420
ESP10, 240, 288, 311, 343, 377, 419, , 423
ESP10, 240, 290, 312, 344, 377, 422, , 426
ESP10, 244, 294, 318, 348, 381, 425, , 429
ESP10, 244, 295, 319, 349, 380, 428, , 432
ESP10, 240, 289, 316, 344, 374, 431, , 435
ESP10, 244, 296, 319, 349, 378, 434, , 438
ESP10, 245, 298, 319, 352, 379, 437, , 441
ESP10, 251, 300, 319, 352, 380, 441, , 445
ESP10, 250, 301, 319, 352, 382, 444, , 448
ESP10, 249, 301, 320, 351, 382, 447, , 451
ESP10, 240, 295, 312, 341, 376, 450, , 454
ESP10, 233, 288, 305, 333, 370, 453, , 457
ESP10, 243, 289, 308, 335, 374, 456, , 460
ESP10, 247, 291, 311, 336, 376, 459, , 463
ESP10, 245, 289, 311, 334, 375, 462, , 466
ESP10, 245, 283, 305, 331, 370, 466, , 470
ESP10, 253, 293, 313, 337, 377, 469, , 473
ESP10, 254, 291, 310, 336, 373, 472, , 476
ESP10, 252, 290, 311, 340, 370, 475, , 479
ESP10, 255, 294, 316, 342, 370, 478, , 482
ESP10, 259, 298, 320, 342, 370, 481, , 485
ESP10, 253, 293, 315, 334, 363, 484, , 488
ESP10, 257, 297, 317, 336, 366, 488, , 492
ESP10, 253, 297, 315, 337, 362, 491, , 495
ESP10, 240, 284, 302, 328, 348, 494, , 498
ESP10, 242, 285, 301, 329, 350, 497, , 501
ESP10, 249, 290, 308, 334, 356, 500, , 504
ESP10, 238, 278, 299, 323, 344, 503, , 507
ESP10, 250, 287, 311, 331, 354, 506, , 510
ESP10, 245, 281, 304, 325, 347, 509, , 513
ESP10, 255, 290, 310, 331, 355, 513, , 517
ESP10, 254, 286, 307, 329, 353, 516, , 520
ESP10, 264, 292, 313, 336, 360, 519, , 523
ESP10, 269, 293, 313, 340, 362, 522, , 526
ESP10, 272, 295, 317, 341, 364, 525, , 529
ESP10, 271, 296, 318, 340, 364, 528, , 532
ESP10, 266, 293, 312, 334, 358, 531, , 535
ESP10, 261, 290, 310, 328, 353, 534, , 538
ESP10, 256, 282, 302, 318, 343, 538, , 542
ESP10, 259, 283, 303, 320, 342, 541, , 545
ESP10, 258, 280, 300, 317, 338, 544, , 548
ESP10, 251, 273, 293, 309, 330, 547, , 551
ESP10, 247, 267, 293, 304, 326, 550, , 554
ESP10, 241, 264, 287, 298, 321, 553, , 557
ESP10, 240, 266, 283, 300, 317, 556, , 560
ESP10, 230, 255, 270, 289, 306, 560, , 564
ESP10, 232, 258, 270, 291, 309, 563, , 567
ESP10, 215, 243, 257, 276, 295, 566, , 570
ESP10, 231, 257, 269, 289, 308, 569, , 573
ESP10, 230, 258, 272, 291, 308, 572, , 576
ESP10, 225, 255, 266, 286, 304, 575, , 579
ESP10, 223, 249, 258, 280, 296, 578, , 582
ESP10, 229, 256, 264, 287, 303, 581, , 585
ESP10, 226, 251, 261, 282, 301, 585, , 589
ESP10, 221, 245, 258, 276, 299, 588, , 592
ESP10, 217, 240, 252, 270, 295, 591, , 595
ESP10, 219, 242, 256, 272, 297, 594, , 598
ESP10, 217, 239, 255, 273, 295, 597, , 601
ESP10, 221, 240, 255, 274, 298, 600, , 604
ESP10, 222, 238, 254, 271, 294, 603, , 607
ESP10, 229, 241, 257, 273, 298, 607, , 611
ESP10, 228, 241, 257, 271, 295, 610, , 614
ESP10, 218, 235, 248, 265, 286, 613, , 617
ESP10, 215, 232, 247, 263, 283, 616, , 620
ESP10, 218, 237, 253, 269, 289, 619, , 623
ESP10, 217, 238, 253, 269, 289, 622, , 626
ESP10, 219, 242, 258, 274, 292, 625, , 629
ESP10, 221, 247, 262, 280, 296, 628, , 632
ESP10, 226, 251, 267, 284, 300, 632, , 636
ESP10, 234, 258, 273, 293, 306, 635, , 639
ESP10, 236, 260, 274, 293, 307, 638, , 642
ESP10, 235, 261, 273, 291, 306, 641, , 645
ESP10, 239, 267, 280, 294, 312, 644, , 648
ESP10, 237, 266, 283, 297, 312, 647, , 651
ESP10, 234, 263, 280, 296, 312, 650, , 654
ESP10, 233, 264, 281, 296, 310, 653, , 657
ESP10, 235, 269, 285, 299, 314, 657, , 661
ESP10, 234, 267, 282, 298, 313, 660, , 664
ESP10, 231, 262, 275, 293, 305, 663, , 667
ESP10, 227, 259, 272, 289, 301, 666, , 670
ESP10, 226, 258, 274, 289, 300, 669, , 673
ESP10, 230, 263, 278, 295, 306, 672, , 676
ESP10, 235, 266, 281, 297, 308, 675, , 679
ESP10, 233, 268, 278, 295, 304, 679, , 683
ESP10, 241, 276, 283, 301, 311, 682, , 686
ESP10, 243, 273, 281, 299, 309, 685, , 689
ESP10, 246, 276, 284, 302, 311, 688, , 692
ESP10, 242, 269, 282, 298, 307, 691, , 695
ESP10, 244, 271, 284, 301, 309, 694, , 698
ESP10, 246, 274, 288, 304, 312, 697, , 701
ESP10, 248, 275, 290, 307, 314, 700, , 704
ESP10, 250, 277, 292, 310, 316, 704, , 708
ESP10, 260, 286, 302, 318, 327, 707, , 711
ESP10, 260, 284, 301, 317, 327, 710, , 714
ESP10, 262, 286, 302, 318, 328, 713, , 717
ESP10, 261, 289, 301, 317, 329, 716, , 720
ESP10, 260, 288, 300, 314, 327, 719, , 723
ESP10, 262, 293, 304, 316, 329, 722, , 726
ESP10, 260, 293, 304, 315, 328, 725, , 729
ESP10, 261, 293, 304, 316, 328, 729, , 733
ESP10, 267, 297, 309, 322, 333, 732, , 736
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Scale To Last 45 Days
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ESP10
HEFS
ESP0
Data Files
/chpsesp/ensemble/natural/WELW1N_SQIN.ESPF10.csv
WELW1N_SQIN.ESPF0.csv|2026-05-01
WELW1N_SQIN.ESPF10.csv|2026-05-01
WELW1N_SQIN.ESPFM.csv|2026-05-01
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ESP10,ESPM,ESP0
ESP10,ESPM,ESP0
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