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Water Year
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COLUMBIA - JOHN DAY DAM
(
JDAO3
)
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
76910
77208
84
77898
92354
APR-JUL
67876
67876
84
67876
80636
APR-AUG
73131
73219
84
73310
87643
JAN-SEP
101830
102129
90
102819
112896
JAN-JUL
92797
92797
92
92797
101178
OCT-SEP
120990
121289
95
121979
128295
Experimental Water Supply
HEFS with 15 days EQPF
Ensemble:
2026-08-15
Issued:
2026-08-15
Hide Forecast
APR-SEP
77022
77267
84
77796
92354
APR-JUL
67876
67876
84
67876
80636
APR-AUG
73198
73293
84
73423
87643
JAN-SEP
101942
102187
91
102717
112896
JAN-JUL
92797
92797
92
92797
101178
OCT-SEP
121102
121347
95
121877
128295
Reference
ESP with 0 Days QPF
Ensemble:
2026-08-15
Issued:
2026-08-15
Hide Forecast
APR-SEP
77051
77354
84
78138
92354
APR-JUL
67876
67876
84
67876
80636
APR-AUG
73125
73243
84
73451
87643
JAN-SEP
101972
102274
91
103059
112896
JAN-JUL
92797
92797
92
92797
101178
OCT-SEP
121132
121434
95
122219
128295
Move the mouse over the desired "Forecast Period" to display a graph.
ESP10, 257, 323, 360, 416, 451, 70, , 74
ESP10, 251, 319, 356, 411, 450, 72, , 76
ESP10, 249, 321, 353, 412, 448, 74, , 78
ESP10, 248, 316, 354, 412, 447, 76, , 80
ESP10, 247, 318, 354, 411, 446, 78, , 82
ESP10, 243, 312, 351, 411, 444, 81, , 85
ESP10, 245, 315, 354, 416, 445, 83, , 87
ESP10, 246, 318, 357, 418, 447, 85, , 89
ESP10, 244, 320, 358, 420, 447, 87, , 91
ESP10, 240, 317, 352, 415, 444, 89, , 93
ESP10, 238, 318, 354, 410, 443, 91, , 95
ESP10, 239, 321, 356, 412, 445, 93, , 97
ESP10, 233, 321, 349, 412, 444, 95, , 99
ESP10, 234, 321, 351, 414, 447, 97, , 101
ESP10, 232, 319, 346, 411, 444, 99, , 103
ESP10, 217, 306, 333, 403, 433, 102, , 106
ESP10, 209, 298, 327, 394, 424, 104, , 108
ESP10, 218, 306, 337, 403, 433, 106, , 110
ESP10, 221, 309, 338, 406, 434, 108, , 112
ESP10, 223, 311, 344, 407, 435, 110, , 114
ESP10, 212, 302, 336, 395, 426, 112, , 116
ESP10, 211, 307, 340, 402, 427, 114, , 118
ESP10, 205, 308, 335, 399, 425, 116, , 120
ESP10, 214, 322, 344, 407, 434, 118, , 122
ESP10, 217, 328, 353, 419, 438, 120, , 124
ESP10, 218, 329, 353, 424, 440, 122, , 126
ESP10, 219, 330, 352, 425, 439, 125, , 129
ESP10, 231, 332, 357, 426, 439, 127, , 131
ESP10, 226, 326, 353, 420, 435, 129, , 133
ESP10, 209, 312, 340, 409, 426, 131, , 135
ESP10, 208, 311, 341, 408, 425, 133, , 137
ESP10, 214, 314, 345, 410, 429, 135, , 139
ESP10, 224, 317, 344, 407, 431, 137, , 141
ESP10, 232, 324, 353, 414, 440, 139, , 143
ESP10, 239, 326, 356, 416, 442, 141, , 145
ESP10, 239, 327, 356, 416, 441, 143, , 147
ESP10, 239, 327, 358, 414, 442, 145, , 149
ESP10, 235, 320, 351, 407, 435, 148, , 152
ESP10, 242, 326, 357, 412, 440, 150, , 154
ESP10, 244, 324, 358, 410, 444, 152, , 156
ESP10, 249, 330, 360, 410, 450, 154, , 158
ESP10, 253, 338, 362, 412, 452, 156, , 160
ESP10, 263, 346, 370, 416, 458, 158, , 162
ESP10, 273, 346, 375, 425, 465, 160, , 164
ESP10, 269, 339, 372, 423, 461, 162, , 166
ESP10, 277, 343, 376, 426, 466, 164, , 168
ESP10, 272, 336, 372, 423, 465, 166, , 170
ESP10, 284, 342, 378, 428, 472, 169, , 173
ESP10, 289, 341, 374, 424, 473, 171, , 175
ESP10, 290, 344, 376, 426, 475, 173, , 177
ESP10, 288, 346, 374, 424, 473, 175, , 179
ESP10, 283, 345, 371, 419, 470, 177, , 181
ESP10, 281, 347, 371, 417, 468, 179, , 183
ESP10, 292, 356, 384, 428, 475, 181, , 185
ESP10, 289, 354, 382, 429, 470, 183, , 187
ESP10, 289, 353, 383, 430, 470, 185, , 189
ESP10, 281, 346, 378, 426, 465, 187, , 191
ESP10, 280, 344, 379, 430, 464, 189, , 193
ESP10, 283, 344, 383, 431, 464, 192, , 196
ESP10, 270, 329, 374, 419, 452, 194, , 198
ESP10, 258, 315, 364, 408, 441, 196, , 200
ESP10, 263, 322, 370, 413, 448, 198, , 202
ESP10, 250, 318, 363, 402, 440, 200, , 204
ESP10, 231, 296, 341, 383, 424, 202, , 206
ESP10, 234, 300, 343, 389, 428, 204, , 208
ESP10, 225, 297, 337, 385, 422, 206, , 210
ESP10, 231, 303, 347, 396, 429, 208, , 212
ESP10, 227, 296, 340, 392, 424, 210, , 214
ESP10, 213, 275, 322, 374, 412, 212, , 216
ESP10, 206, 268, 316, 366, 405, 215, , 219
ESP10, 204, 267, 315, 367, 406, 217, , 221
ESP10, 208, 265, 316, 371, 411, 219, , 223
ESP10, 208, 266, 316, 371, 411, 221, , 225
ESP10, 205, 260, 310, 365, 409, 223, , 227
ESP10, 207, 260, 313, 364, 409, 225, , 229
ESP10, 210, 258, 313, 362, 408, 227, , 231
ESP10, 207, 259, 315, 359, 408, 229, , 233
ESP10, 215, 263, 318, 359, 409, 231, , 235
ESP10, 217, 271, 321, 358, 412, 233, , 237
ESP10, 221, 274, 315, 354, 408, 236, , 240
ESP10, 232, 277, 320, 361, 411, 238, , 242
ESP10, 242, 280, 324, 364, 410, 240, , 244
ESP10, 255, 282, 332, 374, 417, 242, , 246
ESP10, 258, 283, 336, 379, 420, 244, , 248
ESP10, 251, 272, 327, 374, 413, 246, , 250
ESP10, 245, 269, 323, 375, 413, 248, , 252
ESP10, 246, 276, 325, 379, 416, 250, , 254
ESP10, 248, 283, 333, 383, 423, 252, , 256
ESP10, 246, 283, 333, 379, 420, 254, , 258
ESP10, 253, 286, 330, 379, 419, 256, , 260
ESP10, 261, 289, 339, 376, 421, 259, , 263
ESP10, 259, 291, 336, 374, 420, 261, , 265
ESP10, 255, 286, 329, 370, 415, 263, , 267
ESP10, 253, 296, 330, 376, 413, 265, , 269
ESP10, 245, 291, 327, 372, 408, 267, , 271
ESP10, 243, 292, 327, 374, 406, 269, , 273
ESP10, 240, 290, 326, 374, 406, 271, , 275
ESP10, 239, 292, 327, 375, 406, 273, , 277
ESP10, 244, 289, 328, 373, 404, 275, , 279
ESP10, 249, 290, 331, 372, 403, 277, , 281
ESP10, 248, 292, 331, 372, 406, 279, , 283
ESP10, 248, 293, 331, 371, 408, 282, , 286
ESP10, 246, 294, 329, 369, 407, 284, , 288
ESP10, 250, 297, 326, 367, 408, 286, , 290
ESP10, 256, 296, 332, 368, 415, 288, , 292
ESP10, 253, 298, 333, 367, 413, 290, , 294
ESP10, 251, 295, 335, 364, 410, 292, , 296
ESP10, 256, 300, 338, 367, 411, 294, , 298
ESP10, 257, 305, 337, 369, 410, 296, , 300
ESP10, 263, 318, 344, 376, 415, 298, , 302
ESP10, 267, 319, 346, 377, 415, 300, , 304
ESP10, 275, 321, 351, 381, 420, 303, , 307
ESP10, 281, 324, 350, 383, 422, 305, , 309
ESP10, 288, 329, 357, 388, 426, 307, , 311
ESP10, 288, 330, 358, 387, 427, 309, , 313
ESP10, 283, 330, 355, 386, 423, 311, , 315
ESP10, 289, 332, 357, 387, 425, 313, , 317
ESP10, 293, 333, 360, 387, 429, 315, , 319
ESP10, 294, 342, 361, 388, 429, 317, , 321
ESP10, 294, 346, 364, 388, 429, 319, , 323
ESP10, 297, 342, 360, 387, 425, 321, , 325
ESP10, 295, 341, 357, 384, 421, 323, , 327
ESP10, 287, 335, 351, 379, 416, 326, , 330
ESP10, 292, 335, 352, 380, 420, 328, , 332
ESP10, 299, 337, 353, 380, 422, 330, , 334
ESP10, 301, 339, 354, 382, 422, 332, , 336
ESP10, 296, 335, 351, 378, 418, 334, , 338
ESP10, 303, 341, 357, 385, 422, 336, , 340
ESP10, 303, 339, 354, 384, 420, 338, , 342
ESP10, 303, 339, 355, 385, 419, 340, , 344
ESP10, 305, 340, 357, 383, 416, 342, , 346
ESP10, 309, 342, 357, 385, 416, 344, , 348
ESP10, 307, 338, 351, 379, 411, 346, , 350
ESP10, 313, 343, 353, 383, 412, 349, , 353
ESP10, 310, 344, 355, 384, 409, 351, , 355
ESP10, 302, 334, 345, 376, 400, 353, , 357
ESP10, 301, 332, 344, 375, 400, 355, , 359
ESP10, 305, 338, 351, 380, 405, 357, , 361
ESP10, 293, 324, 339, 367, 396, 359, , 363
ESP10, 306, 337, 351, 379, 408, 361, , 365
ESP10, 299, 329, 346, 370, 404, 363, , 367
ESP10, 305, 335, 354, 377, 410, 365, , 369
ESP10, 306, 335, 353, 380, 408, 367, , 371
ESP10, 313, 338, 357, 385, 413, 370, , 374
ESP10, 316, 338, 358, 387, 412, 372, , 376
ESP10, 320, 344, 360, 390, 415, 374, , 378
ESP10, 323, 345, 362, 390, 414, 376, , 380
ESP10, 317, 339, 359, 382, 406, 378, , 382
ESP10, 312, 332, 355, 377, 401, 380, , 384
ESP10, 303, 326, 348, 369, 392, 382, , 386
ESP10, 306, 333, 354, 370, 395, 384, , 388
ESP10, 303, 330, 353, 368, 391, 386, , 390
ESP10, 294, 322, 349, 362, 383, 388, , 392
ESP10, 286, 316, 344, 358, 375, 390, , 394
ESP10, 283, 314, 343, 357, 370, 393, , 397
ESP10, 280, 312, 339, 355, 370, 395, , 399
ESP10, 273, 304, 331, 347, 362, 397, , 401
ESP10, 276, 307, 332, 348, 363, 399, , 403
ESP10, 268, 298, 320, 335, 352, 401, , 405
ESP10, 282, 311, 334, 347, 365, 403, , 407
ESP10, 282, 310, 329, 344, 363, 405, , 409
ESP10, 274, 304, 322, 340, 356, 407, , 411
ESP10, 279, 308, 322, 343, 358, 409, , 413
ESP10, 284, 312, 328, 349, 365, 411, , 415
ESP10, 282, 310, 327, 347, 362, 413, , 417
ESP10, 279, 309, 325, 345, 359, 416, , 420
ESP10, 273, 304, 320, 340, 354, 418, , 422
ESP10, 275, 307, 324, 347, 357, 420, , 424
ESP10, 278, 307, 324, 346, 361, 422, , 426
ESP10, 283, 309, 330, 348, 362, 424, , 428
ESP10, 286, 308, 329, 347, 361, 426, , 430
ESP10, 293, 312, 331, 349, 365, 428, , 432
ESP10, 298, 311, 332, 347, 366, 430, , 434
ESP10, 287, 300, 322, 336, 356, 432, , 436
ESP10, 282, 298, 318, 330, 350, 434, , 438
ESP10, 285, 303, 321, 337, 354, 437, , 441
ESP10, 281, 299, 319, 336, 351, 439, , 443
ESP10, 283, 301, 324, 342, 353, 441, , 445
ESP10, 285, 306, 330, 346, 359, 443, , 447
ESP10, 287, 308, 331, 349, 363, 445, , 449
ESP10, 293, 315, 340, 355, 368, 447, , 451
ESP10, 297, 316, 342, 356, 370, 449, , 453
ESP10, 294, 315, 340, 351, 368, 451, , 455
ESP10, 299, 324, 345, 358, 373, 453, , 457
ESP10, 298, 323, 345, 360, 372, 455, , 459
ESP10, 295, 321, 345, 361, 371, 457, , 461
ESP10, 298, 321, 345, 362, 370, 460, , 464
ESP10, 300, 328, 350, 366, 373, 462, , 466
ESP10, 299, 322, 347, 362, 368, 464, , 468
ESP10, 294, 316, 341, 354, 361, 466, , 470
ESP10, 291, 316, 337, 351, 358, 468, , 472
ESP10, 292, 315, 337, 350, 358, 470, , 474
ESP10, 291, 316, 337, 351, 358, 472, , 476
ESP10, 295, 318, 340, 354, 361, 474, , 478
ESP10, 292, 319, 336, 350, 356, 476, , 480
ESP10, 305, 328, 345, 358, 364, 478, , 482
ESP10, 301, 323, 343, 356, 362, 480, , 484
ESP10, 309, 331, 346, 360, 367, 483, , 487
ESP10, 312, 327, 345, 356, 364, 485, , 489
ESP10, 312, 326, 345, 356, 364, 487, , 491
ESP10, 315, 330, 346, 360, 365, 489, , 493
ESP10, 316, 331, 349, 362, 367, 491, , 495
ESP10, 317, 336, 352, 363, 370, 493, , 497
ESP10, 326, 346, 362, 371, 381, 495, , 499
ESP10, 325, 345, 360, 370, 381, 497, , 501
ESP10, 326, 347, 361, 371, 381, 499, , 503
ESP10, 324, 347, 359, 368, 380, 501, , 505
ESP10, 322, 347, 359, 368, 380, 504, , 508
ESP10, 325, 350, 361, 370, 382, 506, , 510
ESP10, 326, 349, 361, 369, 381, 508, , 512
ESP10, 327, 350, 362, 372, 381, 510, , 514
ESP10, 334, 354, 367, 376, 386, 512, , 516
ESP10, 337, 358, 369, 378, 390, 514, , 518
ESP10, 337, 359, 371, 380, 390, 516, , 520
ESP10, 338, 359, 371, 381, 389, 518, , 522
ESP10, 338, 358, 371, 380, 388, 520, , 524
ESP10, 339, 359, 371, 381, 387, 522, , 526
ESP10, 338, 357, 371, 382, 386, 524, , 528
ESP10, 338, 356, 370, 382, 387, 527, , 531
ESP10, 339, 359, 368, 382, 388, 529, , 533
ESP10, 342, 362, 369, 383, 388, 531, , 535
ESP10, 342, 360, 368, 382, 385, 533, , 537
ESP10, 344, 360, 368, 381, 385, 535, , 539
ESP10, 346, 360, 371, 382, 388, 537, , 541
ESP10, 344, 357, 370, 379, 386, 539, , 543
ESP10, 348, 357, 371, 381, 388, 541, , 545
ESP10, 349, 355, 370, 380, 387, 543, , 547
ESP10, 351, 357, 374, 381, 387, 545, , 549
ESP10, 353, 360, 376, 383, 388, 547, , 551
ESP10, 356, 366, 379, 387, 392, 550, , 554
ESP10, 353, 363, 375, 383, 388, 552, , 556
ESP10, 351, 362, 373, 381, 386, 554, , 558
ESP10, 353, 366, 374, 381, 386, 556, , 560
ESP10, 351, 365, 373, 378, 383, 558, , 562
ESP10, 352, 364, 374, 379, 383, 560, , 564
ESP10, 350, 361, 372, 375, 383, 562, , 566
ESP10, 351, 360, 370, 375, 381, 564, , 568
ESP10, 351, 363, 370, 376, 381, 566, , 570
ESP10, 355, 364, 372, 377, 383, 568, , 572
ESP10, 351, 360, 368, 373, 380, 571, , 575
ESP10, 355, 362, 371, 376, 382, 573, , 577
ESP10, 355, 361, 370, 377, 382, 575, , 579
ESP10, 356, 363, 372, 377, 383, 577, , 581
ESP10, 359, 364, 373, 380, 385, 579, , 583
ESP10, 359, 364, 371, 379, 384, 581, , 585
ESP10, 359, 364, 372, 379, 384, 583, , 587
ESP10, 363, 369, 375, 383, 387, 585, , 589
ESP10, 366, 372, 376, 384, 389, 587, , 591
ESP10, 367, 374, 378, 386, 390, 589, , 593
ESP10, 365, 372, 377, 384, 388, 591, , 595
ESP10, 371, 379, 384, 390, 394, 594, , 598
ESP10, 371, 379, 386, 391, 393, 596, , 600
ESP10, 375, 383, 389, 394, 397, 598, , 602
ESP10, 376, 381, 388, 393, 395, 600, , 604
ESP10, 377, 382, 388, 393, 395, 602, , 606
ESP10, 378, 384, 389, 395, 397, 604, , 608
ESP10, 379, 384, 390, 395, 397, 606, , 610
ESP10, 378, 384, 389, 394, 397, 608, , 612
ESP10, 378, 384, 389, 393, 396, 610, , 614
ESP10, 379, 386, 392, 396, 398, 612, , 616
ESP10, 380, 387, 392, 397, 399, 614, , 618
ESP10, 379, 387, 392, 396, 398, 617, , 621
ESP10, 379, 388, 392, 397, 399, 619, , 623
ESP10, 377, 385, 389, 394, 398, 621, , 625
ESP10, 384, 391, 395, 400, 403, 623, , 627
ESP10, 384, 390, 394, 399, 402, 625, , 629
ESP10, 385, 391, 395, 399, 403, 627, , 631
ESP10, 381, 387, 392, 395, 399, 629, , 633
ESP10, 381, 387, 392, 395, 399, 631, , 635
ESP10, 379, 385, 390, 392, 396, 633, , 637
ESP10, 381, 388, 393, 395, 398, 635, , 639
ESP10, 384, 389, 394, 396, 400, 638, , 642
ESP10, 383, 387, 393, 395, 398, 640, , 644
ESP10, 384, 387, 393, 396, 398, 642, , 646
ESP10, 384, 387, 393, 396, 398, 644, , 648
ESP10, 386, 389, 395, 398, 399, 646, , 650
ESP10, 390, 393, 397, 400, 401, 648, , 652
ESP10, 391, 393, 397, 400, 401, 650, , 654
ESP10, 391, 393, 397, 400, 401, 652, , 656
ESP10, 391, 394, 398, 400, 401, 654, , 658
ESP10, 391, 395, 398, 401, 401, 656, , 660
ESP10, 391, 396, 398, 401, 401, 658, , 662
ESP10, 391, 395, 397, 400, 401, 661, , 665
ESP10, 390, 395, 397, 400, 400, 663, , 667
ESP10, 390, 394, 396, 399, 400, 665, , 669
ESP10, 391, 396, 398, 400, 401, 667, , 671
ESP10, 391, 396, 398, 400, 401, 669, , 673
ESP10, 390, 396, 398, 399, 401, 671, , 675
ESP10, 391, 396, 398, 400, 401, 673, , 677
ESP10, 391, 397, 398, 400, 401, 675, , 679
ESP10, 391, 396, 398, 400, 401, 677, , 681
ESP10, 391, 396, 398, 399, 401, 679, , 683
ESP10, 391, 396, 398, 399, 401, 681, , 685
ESP10, 391, 396, 398, 399, 401, 684, , 688
ESP10, 391, 396, 398, 399, 401, 686, , 690
ESP10, 392, 396, 398, 400, 401, 688, , 692
ESP10, 393, 396, 398, 400, 401, 690, , 694
ESP10, 394, 397, 399, 401, 402, 692, , 696
ESP10, 393, 398, 399, 400, 401, 694, , 698
ESP10, 395, 399, 400, 401, 402, 696, , 700
ESP10, 394, 398, 400, 401, 402, 698, , 702
ESP10, 395, 398, 400, 401, 402, 700, , 704
ESP10, 396, 399, 400, 401, 402, 702, , 706
ESP10, 396, 399, 400, 401, 402, 705, , 709
ESP10, 396, 399, 401, 402, 402, 707, , 711
ESP10, 397, 400, 401, 402, 403, 709, , 713
ESP10, 397, 399, 401, 402, 402, 711, , 715
ESP10, 397, 400, 401, 402, 403, 713, , 717
ESP10, 397, 399, 401, 402, 402, 715, , 719
ESP10, 398, 400, 401, 402, 403, 717, , 721
ESP10, 396, 399, 400, 401, 402, 719, , 723
ESP10, 396, 400, 401, 402, 402, 721, , 725
ESP10, 396, 400, 401, 402, 402, 723, , 727
ESP10, 397, 399, 401, 401, 402, 725, , 729
ESP10, 398, 400, 401, 402, 403, 728, , 732
ESP10, 400, 401, 403, 403, 404, 730, , 734
ESP10, 399, 401, 402, 403, 404, 732, , 736
ESP10, 399, 401, 402, 403, 404, 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/watersupply/JDAO3W_SQIN.ESPF10.csv
JDAO3W_SQIN.ESPF0.csv|2026-08-15
JDAO3W_SQIN.ESPF10.csv|2026-08-15
JDAO3W_SQIN.ESPFM.csv|2026-08-15
APR-SEP
COLUMBIA - JOHN DAY DAM
(
JDAO3
)
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
65637
87395
95
110504
92354
APR-JUL
56137
74656
93
94689
80636
APR-AUG
61824
82317
94
104521
87643
JAN-SEP
80440
104799
93
131225
112896
JAN-JUL
70766
91892
91
117018
101178
OCT-SEP
92471
117665
92
149326
128295
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/JDAO3W_SQIN.ESPF10.csv
JDAO3W_SQIN.ESPF0.csv|2026-08-15
JDAO3W_SQIN.ESPF10.csv|2026-08-15
JDAO3W_SQIN.ESPFM.csv|2026-08-15
APR-SEP
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ESP10,ESPM,ESP0
ESP10,ESPM,ESP0
Last Forecast
