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Archive:
Water Year
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SF BOISE - ANDERSON RANCH DAM
(
ARAI1
)
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
309
310
63
312
495
APR-JUL
278
278
60
278
462
APR-AUG
295
295
61
295
480
JAN-SEP
422
422
72
424
583
JAN-JUL
390
390
71
390
550
OCT-SEP
504
504
79
506
637
Experimental Water Supply
HEFS with 15 days EQPF
Ensemble:
2026-08-15
Issued:
2026-08-15
Hide Forecast
APR-SEP
309
310
63
312
495
APR-JUL
278
278
60
278
462
APR-AUG
295
295
61
295
480
JAN-SEP
422
423
72
424
583
JAN-JUL
390
390
71
390
550
OCT-SEP
504
505
79
506
637
Reference
ESP with 0 Days QPF
Ensemble:
2026-08-15
Issued:
2026-08-15
Hide Forecast
APR-SEP
309
310
63
313
495
APR-JUL
278
278
60
278
462
APR-AUG
295
295
61
296
480
JAN-SEP
422
423
73
425
583
JAN-JUL
390
390
71
390
550
OCT-SEP
504
505
79
507
637
Move the mouse over the desired "Forecast Period" to display a graph.
ESP10, 183, 262, 374, 415, 475, 70, , 74
ESP10, 182, 260, 372, 413, 474, 72, , 76
ESP10, 182, 259, 371, 412, 473, 74, , 78
ESP10, 186, 262, 374, 415, 476, 76, , 80
ESP10, 188, 261, 373, 414, 476, 78, , 82
ESP10, 186, 257, 369, 411, 473, 81, , 85
ESP10, 185, 255, 367, 409, 472, 83, , 87
ESP10, 189, 258, 370, 412, 474, 85, , 89
ESP10, 188, 257, 370, 411, 474, 87, , 91
ESP10, 181, 250, 363, 405, 468, 89, , 93
ESP10, 178, 249, 361, 402, 466, 91, , 95
ESP10, 183, 260, 366, 407, 470, 93, , 97
ESP10, 180, 262, 363, 405, 469, 95, , 99
ESP10, 177, 261, 360, 402, 467, 97, , 101
ESP10, 170, 253, 352, 395, 461, 99, , 103
ESP10, 159, 236, 337, 383, 447, 102, , 106
ESP10, 149, 227, 330, 376, 438, 104, , 108
ESP10, 155, 230, 336, 383, 441, 106, , 110
ESP10, 160, 230, 336, 383, 441, 108, , 112
ESP10, 167, 242, 341, 388, 446, 110, , 114
ESP10, 160, 237, 333, 381, 438, 112, , 116
ESP10, 169, 247, 340, 387, 444, 114, , 118
ESP10, 168, 247, 340, 387, 443, 116, , 120
ESP10, 178, 257, 354, 396, 452, 118, , 122
ESP10, 177, 260, 353, 395, 450, 120, , 124
ESP10, 176, 258, 351, 394, 447, 122, , 126
ESP10, 184, 263, 353, 396, 447, 125, , 129
ESP10, 187, 266, 354, 401, 450, 127, , 131
ESP10, 181, 263, 349, 398, 444, 129, , 133
ESP10, 168, 250, 334, 389, 432, 131, , 135
ESP10, 166, 253, 333, 392, 435, 133, , 137
ESP10, 162, 252, 328, 391, 432, 135, , 139
ESP10, 172, 263, 334, 398, 445, 137, , 141
ESP10, 177, 265, 335, 408, 457, 139, , 143
ESP10, 177, 265, 335, 409, 457, 141, , 145
ESP10, 178, 263, 336, 408, 458, 143, , 147
ESP10, 174, 258, 335, 406, 459, 145, , 149
ESP10, 168, 249, 326, 398, 453, 148, , 152
ESP10, 173, 249, 326, 398, 454, 150, , 154
ESP10, 181, 252, 334, 403, 458, 152, , 156
ESP10, 198, 268, 347, 414, 470, 154, , 158
ESP10, 217, 287, 358, 426, 477, 156, , 160
ESP10, 215, 291, 362, 424, 474, 158, , 162
ESP10, 222, 295, 369, 428, 478, 160, , 164
ESP10, 228, 301, 374, 433, 481, 162, , 166
ESP10, 230, 303, 380, 434, 485, 164, , 168
ESP10, 232, 308, 384, 435, 489, 166, , 170
ESP10, 237, 311, 386, 437, 492, 169, , 173
ESP10, 238, 307, 383, 434, 490, 171, , 175
ESP10, 237, 306, 379, 431, 488, 173, , 177
ESP10, 237, 310, 378, 430, 488, 175, , 179
ESP10, 234, 307, 374, 427, 484, 177, , 181
ESP10, 243, 313, 385, 434, 492, 179, , 183
ESP10, 245, 315, 388, 436, 494, 181, , 185
ESP10, 246, 321, 387, 435, 495, 183, , 187
ESP10, 251, 319, 387, 439, 495, 185, , 189
ESP10, 246, 312, 384, 434, 490, 187, , 191
ESP10, 246, 312, 386, 434, 490, 189, , 193
ESP10, 253, 321, 392, 441, 494, 192, , 196
ESP10, 238, 308, 380, 427, 483, 194, , 198
ESP10, 235, 308, 378, 426, 478, 196, , 200
ESP10, 241, 316, 387, 431, 481, 198, , 202
ESP10, 233, 308, 377, 423, 476, 200, , 204
ESP10, 234, 305, 373, 425, 474, 202, , 206
ESP10, 238, 301, 375, 430, 476, 204, , 208
ESP10, 234, 290, 369, 423, 467, 206, , 210
ESP10, 228, 285, 363, 421, 467, 208, , 212
ESP10, 250, 308, 381, 438, 482, 210, , 214
ESP10, 253, 305, 378, 435, 479, 212, , 216
ESP10, 254, 296, 372, 430, 471, 215, , 219
ESP10, 253, 294, 365, 421, 468, 217, , 221
ESP10, 243, 282, 352, 412, 463, 219, , 223
ESP10, 229, 267, 339, 404, 455, 221, , 225
ESP10, 227, 269, 338, 409, 454, 223, , 227
ESP10, 234, 275, 344, 414, 464, 225, , 229
ESP10, 230, 262, 333, 404, 458, 227, , 231
ESP10, 224, 257, 326, 397, 452, 229, , 233
ESP10, 233, 273, 335, 406, 459, 231, , 235
ESP10, 231, 283, 334, 405, 458, 233, , 237
ESP10, 238, 291, 337, 406, 459, 236, , 240
ESP10, 241, 292, 335, 403, 454, 238, , 242
ESP10, 245, 289, 346, 405, 454, 240, , 244
ESP10, 244, 287, 344, 407, 451, 242, , 246
ESP10, 244, 284, 342, 406, 449, 244, , 248
ESP10, 238, 277, 336, 400, 443, 246, , 250
ESP10, 241, 274, 337, 398, 444, 248, , 252
ESP10, 246, 275, 338, 396, 449, 250, , 254
ESP10, 253, 280, 344, 401, 455, 252, , 256
ESP10, 247, 273, 339, 396, 451, 254, , 258
ESP10, 248, 276, 342, 395, 451, 256, , 260
ESP10, 246, 274, 340, 391, 449, 259, , 263
ESP10, 258, 274, 342, 390, 448, 261, , 265
ESP10, 254, 266, 334, 383, 443, 263, , 267
ESP10, 253, 272, 335, 382, 443, 265, , 269
ESP10, 250, 275, 335, 379, 441, 267, , 271
ESP10, 245, 280, 330, 377, 437, 269, , 273
ESP10, 245, 285, 330, 379, 437, 271, , 275
ESP10, 249, 287, 333, 382, 438, 273, , 277
ESP10, 255, 294, 341, 390, 440, 275, , 279
ESP10, 262, 294, 343, 392, 440, 277, , 281
ESP10, 266, 312, 343, 398, 440, 279, , 283
ESP10, 271, 317, 343, 398, 440, 282, , 286
ESP10, 274, 317, 342, 401, 440, 284, , 288
ESP10, 275, 317, 344, 401, 439, 286, , 290
ESP10, 282, 321, 350, 404, 441, 288, , 292
ESP10, 282, 321, 350, 406, 442, 290, , 294
ESP10, 280, 318, 347, 405, 439, 292, , 296
ESP10, 287, 325, 353, 411, 444, 294, , 298
ESP10, 287, 325, 355, 411, 445, 296, , 300
ESP10, 289, 326, 359, 414, 450, 298, , 302
ESP10, 287, 327, 358, 413, 449, 300, , 304
ESP10, 291, 330, 364, 415, 451, 303, , 307
ESP10, 292, 334, 367, 417, 451, 305, , 309
ESP10, 293, 335, 368, 418, 451, 307, , 311
ESP10, 293, 340, 369, 419, 451, 309, , 313
ESP10, 297, 341, 370, 420, 452, 311, , 315
ESP10, 298, 341, 371, 422, 452, 313, , 317
ESP10, 298, 342, 371, 424, 451, 315, , 319
ESP10, 299, 345, 374, 425, 452, 317, , 321
ESP10, 300, 345, 377, 428, 452, 319, , 323
ESP10, 300, 345, 383, 432, 453, 321, , 325
ESP10, 300, 346, 380, 429, 450, 323, , 327
ESP10, 302, 347, 381, 431, 451, 326, , 330
ESP10, 297, 340, 377, 425, 447, 328, , 332
ESP10, 299, 340, 376, 422, 446, 330, , 334
ESP10, 311, 346, 379, 426, 450, 332, , 336
ESP10, 313, 349, 383, 426, 450, 334, , 338
ESP10, 310, 343, 379, 421, 447, 336, , 340
ESP10, 308, 340, 385, 417, 445, 338, , 342
ESP10, 312, 340, 382, 418, 445, 340, , 344
ESP10, 318, 344, 389, 421, 446, 342, , 346
ESP10, 323, 351, 390, 421, 446, 344, , 348
ESP10, 327, 356, 395, 427, 451, 346, , 350
ESP10, 330, 362, 397, 431, 455, 349, , 353
ESP10, 332, 365, 400, 435, 459, 351, , 355
ESP10, 330, 365, 397, 435, 459, 353, , 357
ESP10, 320, 358, 388, 428, 456, 355, , 359
ESP10, 322, 359, 388, 427, 456, 357, , 361
ESP10, 316, 344, 376, 416, 445, 359, , 363
ESP10, 334, 359, 391, 430, 461, 361, , 365
ESP10, 335, 359, 390, 430, 460, 363, , 367
ESP10, 342, 360, 396, 430, 460, 365, , 369
ESP10, 352, 371, 404, 439, 467, 367, , 371
ESP10, 349, 369, 401, 436, 463, 370, , 374
ESP10, 348, 370, 407, 436, 463, 372, , 376
ESP10, 345, 368, 409, 439, 462, 374, , 378
ESP10, 352, 376, 417, 447, 470, 376, , 380
ESP10, 346, 370, 412, 442, 463, 378, , 382
ESP10, 341, 366, 411, 438, 458, 380, , 384
ESP10, 339, 366, 411, 441, 456, 382, , 386
ESP10, 348, 373, 417, 449, 461, 384, , 388
ESP10, 351, 378, 418, 450, 461, 386, , 390
ESP10, 351, 378, 418, 449, 461, 388, , 392
ESP10, 354, 378, 412, 447, 456, 390, , 394
ESP10, 360, 381, 414, 448, 458, 393, , 397
ESP10, 362, 383, 414, 447, 457, 395, , 399
ESP10, 365, 384, 414, 447, 457, 397, , 401
ESP10, 365, 382, 418, 447, 459, 399, , 403
ESP10, 369, 387, 419, 449, 462, 401, , 405
ESP10, 379, 396, 426, 457, 470, 403, , 407
ESP10, 382, 397, 426, 456, 472, 405, , 409
ESP10, 373, 387, 417, 447, 462, 407, , 411
ESP10, 386, 402, 433, 461, 477, 409, , 413
ESP10, 388, 407, 433, 463, 478, 411, , 415
ESP10, 390, 406, 431, 463, 476, 413, , 417
ESP10, 393, 410, 437, 461, 475, 416, , 420
ESP10, 390, 407, 437, 460, 472, 418, , 422
ESP10, 396, 412, 443, 466, 476, 420, , 424
ESP10, 411, 422, 456, 476, 484, 422, , 426
ESP10, 415, 424, 456, 479, 486, 424, , 428
ESP10, 417, 428, 459, 480, 486, 426, , 430
ESP10, 417, 430, 457, 479, 485, 428, , 432
ESP10, 416, 433, 456, 477, 483, 430, , 434
ESP10, 402, 421, 445, 464, 470, 432, , 436
ESP10, 399, 419, 443, 462, 468, 434, , 438
ESP10, 401, 422, 445, 462, 471, 437, , 441
ESP10, 396, 418, 443, 457, 468, 439, , 443
ESP10, 402, 418, 445, 457, 470, 441, , 445
ESP10, 407, 421, 451, 460, 474, 443, , 447
ESP10, 406, 426, 451, 459, 473, 445, , 449
ESP10, 405, 427, 450, 462, 472, 447, , 451
ESP10, 414, 436, 460, 469, 479, 449, , 453
ESP10, 413, 432, 455, 469, 475, 451, , 455
ESP10, 422, 442, 464, 478, 485, 453, , 457
ESP10, 419, 440, 462, 476, 483, 455, , 459
ESP10, 417, 441, 461, 475, 483, 457, , 461
ESP10, 416, 442, 460, 474, 482, 460, , 464
ESP10, 422, 448, 466, 478, 484, 462, , 466
ESP10, 411, 435, 452, 466, 475, 464, , 468
ESP10, 437, 458, 475, 487, 495, 466, , 470
ESP10, 437, 459, 474, 487, 493, 468, , 472
ESP10, 427, 453, 467, 479, 485, 470, , 474
ESP10, 426, 453, 466, 478, 486, 472, , 476
ESP10, 419, 443, 457, 469, 477, 474, , 478
ESP10, 426, 451, 463, 473, 481, 476, , 480
ESP10, 426, 454, 463, 475, 482, 478, , 482
ESP10, 426, 454, 465, 473, 482, 480, , 484
ESP10, 432, 461, 471, 479, 488, 483, , 487
ESP10, 432, 457, 468, 477, 485, 485, , 489
ESP10, 430, 457, 468, 476, 484, 487, , 491
ESP10, 431, 455, 465, 473, 481, 489, , 493
ESP10, 432, 455, 468, 473, 481, 491, , 495
ESP10, 445, 460, 473, 478, 486, 493, , 497
ESP10, 452, 466, 478, 483, 491, 495, , 499
ESP10, 451, 468, 479, 485, 491, 497, , 501
ESP10, 453, 469, 480, 488, 493, 499, , 503
ESP10, 451, 470, 479, 487, 491, 501, , 505
ESP10, 448, 468, 476, 485, 488, 504, , 508
ESP10, 454, 473, 480, 488, 491, 506, , 510
ESP10, 455, 473, 479, 487, 490, 508, , 512
ESP10, 454, 472, 478, 487, 490, 510, , 514
ESP10, 455, 473, 481, 488, 492, 512, , 516
ESP10, 454, 473, 481, 488, 492, 514, , 518
ESP10, 455, 473, 482, 489, 492, 516, , 520
ESP10, 456, 473, 483, 490, 493, 518, , 522
ESP10, 457, 473, 482, 488, 491, 520, , 524
ESP10, 458, 473, 481, 487, 490, 522, , 526
ESP10, 441, 458, 466, 473, 475, 524, , 528
ESP10, 442, 459, 465, 470, 473, 527, , 531
ESP10, 430, 446, 454, 461, 464, 529, , 533
ESP10, 434, 451, 458, 465, 467, 531, , 535
ESP10, 436, 451, 458, 465, 467, 533, , 537
ESP10, 442, 454, 461, 467, 470, 535, , 539
ESP10, 444, 455, 461, 467, 469, 537, , 541
ESP10, 445, 456, 462, 467, 469, 539, , 543
ESP10, 443, 454, 460, 465, 467, 541, , 545
ESP10, 445, 456, 462, 465, 467, 543, , 547
ESP10, 444, 456, 462, 464, 466, 545, , 549
ESP10, 444, 456, 463, 464, 465, 547, , 551
ESP10, 444, 457, 462, 464, 465, 550, , 554
ESP10, 443, 457, 462, 464, 465, 552, , 556
ESP10, 445, 459, 463, 464, 465, 554, , 558
ESP10, 446, 459, 463, 464, 465, 556, , 560
ESP10, 448, 456, 462, 464, 465, 558, , 562
ESP10, 446, 456, 460, 462, 463, 560, , 564
ESP10, 451, 458, 461, 463, 464, 562, , 566
ESP10, 452, 456, 459, 460, 461, 564, , 568
ESP10, 448, 452, 454, 455, 455, 566, , 570
ESP10, 449, 451, 453, 454, 454, 568, , 572
ESP10, 449, 451, 452, 453, 454, 571, , 575
ESP10, 449, 451, 452, 453, 453, 573, , 577
ESP10, 446, 448, 449, 450, 450, 575, , 579
ESP10, 446, 447, 449, 450, 450, 577, , 581
ESP10, 447, 447, 448, 449, 450, 579, , 583
ESP10, 446, 447, 448, 449, 449, 581, , 585
ESP10, 446, 446, 448, 449, 449, 583, , 587
ESP10, 444, 445, 446, 447, 447, 585, , 589
ESP10, 444, 445, 446, 447, 447, 587, , 591
ESP10, 444, 445, 446, 447, 447, 589, , 593
ESP10, 444, 445, 446, 447, 447, 591, , 595
ESP10, 444, 445, 446, 447, 448, 594, , 598
ESP10, 443, 443, 445, 445, 446, 596, , 600
ESP10, 442, 443, 445, 445, 446, 598, , 602
ESP10, 441, 442, 443, 444, 444, 600, , 604
ESP10, 442, 442, 444, 444, 445, 602, , 606
ESP10, 442, 442, 444, 444, 445, 604, , 608
ESP10, 442, 442, 444, 444, 445, 606, , 610
ESP10, 441, 442, 444, 444, 445, 608, , 612
ESP10, 441, 442, 443, 444, 444, 610, , 614
ESP10, 441, 442, 443, 444, 444, 612, , 616
ESP10, 441, 442, 443, 444, 444, 614, , 618
ESP10, 432, 433, 434, 435, 436, 617, , 621
ESP10, 432, 433, 434, 435, 435, 619, , 623
ESP10, 432, 433, 434, 435, 435, 621, , 625
ESP10, 432, 433, 434, 434, 435, 623, , 627
ESP10, 431, 432, 433, 434, 434, 625, , 629
ESP10, 431, 432, 433, 433, 434, 627, , 631
ESP10, 431, 432, 433, 433, 434, 629, , 633
ESP10, 430, 431, 432, 433, 433, 631, , 635
ESP10, 431, 432, 433, 433, 434, 633, , 637
ESP10, 429, 430, 431, 432, 432, 635, , 639
ESP10, 429, 430, 431, 432, 432, 638, , 642
ESP10, 428, 429, 430, 431, 431, 640, , 644
ESP10, 428, 429, 430, 431, 431, 642, , 646
ESP10, 428, 429, 430, 431, 431, 644, , 648
ESP10, 428, 429, 430, 431, 431, 646, , 650
ESP10, 428, 429, 430, 431, 431, 648, , 652
ESP10, 428, 429, 430, 431, 431, 650, , 654
ESP10, 428, 429, 430, 431, 431, 652, , 656
ESP10, 428, 429, 430, 431, 431, 654, , 658
ESP10, 428, 429, 430, 431, 431, 656, , 660
ESP10, 428, 429, 430, 430, 431, 658, , 662
ESP10, 426, 427, 428, 428, 429, 661, , 665
ESP10, 426, 427, 428, 429, 429, 663, , 667
ESP10, 426, 427, 428, 428, 429, 665, , 669
ESP10, 426, 427, 428, 429, 429, 667, , 671
ESP10, 426, 427, 428, 428, 428, 669, , 673
ESP10, 425, 426, 427, 428, 428, 671, , 675
ESP10, 425, 426, 427, 428, 428, 673, , 677
ESP10, 426, 427, 428, 428, 428, 675, , 679
ESP10, 426, 427, 428, 428, 428, 677, , 681
ESP10, 426, 427, 428, 428, 428, 679, , 683
ESP10, 426, 427, 427, 428, 428, 681, , 685
ESP10, 426, 427, 427, 428, 428, 684, , 688
ESP10, 426, 427, 427, 428, 428, 686, , 690
ESP10, 426, 427, 428, 428, 428, 688, , 692
ESP10, 426, 427, 427, 428, 428, 690, , 694
ESP10, 426, 427, 427, 428, 428, 692, , 696
ESP10, 425, 426, 427, 427, 427, 694, , 698
ESP10, 425, 426, 427, 427, 427, 696, , 700
ESP10, 425, 426, 427, 427, 427, 698, , 702
ESP10, 425, 426, 427, 427, 427, 700, , 704
ESP10, 425, 426, 427, 427, 427, 702, , 706
ESP10, 425, 426, 426, 427, 427, 705, , 709
ESP10, 425, 426, 426, 427, 427, 707, , 711
ESP10, 425, 426, 426, 427, 427, 709, , 713
ESP10, 425, 426, 427, 427, 427, 711, , 715
ESP10, 425, 426, 426, 427, 427, 713, , 717
ESP10, 425, 426, 426, 427, 427, 715, , 719
ESP10, 425, 426, 426, 427, 427, 717, , 721
ESP10, 425, 426, 426, 427, 427, 719, , 723
ESP10, 425, 426, 426, 427, 427, 721, , 725
ESP10, 425, 426, 426, 426, 427, 723, , 727
ESP10, 425, 426, 426, 426, 426, 725, , 729
ESP10, 425, 426, 426, 426, 427, 728, , 732
ESP10, 425, 426, 426, 426, 427, 730, , 734
ESP10, 425, 426, 426, 427, 427, 732, , 736
ESP10, 425, 426, 426, 427, 427, 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/ARAI1W_SQIN.ESPF10.csv
ARAI1W_SQIN.ESPF0.csv|2026-08-15
ARAI1W_SQIN.ESPF10.csv|2026-08-15
ARAI1W_SQIN.ESPFM.csv|2026-08-15
APR-SEP
SF BOISE - ANDERSON RANCH DAM
(
ARAI1
)
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
216
434
88
802
495
APR-JUL
195
404
87
754
462
APR-AUG
206
419
87
781
480
JAN-SEP
287
509
87
951
583
JAN-JUL
269
480
87
903
550
OCT-SEP
341
573
90
1021
637
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/ARAI1W_SQIN.ESPF10.csv
ARAI1W_SQIN.ESPF0.csv|2026-08-15
ARAI1W_SQIN.ESPF10.csv|2026-08-15
ARAI1W_SQIN.ESPFM.csv|2026-08-15
APR-SEP
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ESP10,ESPM,ESP0
ESP10,ESPM,ESP0
Last Forecast
