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Archive:
Water Year
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BOISE - ARROWROCK DAM
(
ARKI1
)
Forecasts for Water Year
2026
Natural Forecast
ESP with 10 Days QPF
Ensemble:
2026-04-18
Issued:
2026-04-18
Hide Forecast
Forecast
Period
Forecasts Are in KAF
30 Year
Average
(1991-2020)
90 %
50 %
%
Average
10 %
APR-SEP
588
665
55
827
1212
APR-JUL
522
599
53
747
1121
JAN-SEP
876
954
64
1115
1479
JAN-JUL
810
888
64
1036
1388
OCT-SEP
1081
1158
71
1320
1636
Experimental
HEFS with 15 days EQPF
Ensemble:
2026-04-18
Issued:
2026-04-18
Hide Forecast
APR-SEP
578
667
55
862
1212
APR-JUL
510
587
52
786
1121
JAN-SEP
867
955
65
1151
1479
JAN-JUL
799
876
63
1075
1388
OCT-SEP
1071
1160
71
1355
1636
Reference
ESP with 0 Days QPF
Ensemble:
2026-04-18
Issued:
2026-04-18
Hide Forecast
APR-SEP
570
683
56
868
1212
APR-JUL
508
616
55
791
1121
JAN-SEP
859
972
66
1156
1479
JAN-JUL
797
905
65
1079
1388
OCT-SEP
1063
1176
72
1361
1636
Move the mouse over the desired "Forecast Period" to display a graph.
ESP10, 190, 264, 371, 409, 465, 71, , 75
ESP10, 190, 263, 370, 408, 464, 75, , 79
ESP10, 189, 261, 370, 407, 465, 78, , 82
ESP10, 193, 265, 373, 409, 467, 81, , 85
ESP10, 194, 264, 372, 409, 466, 85, , 89
ESP10, 192, 260, 369, 408, 464, 88, , 92
ESP10, 192, 259, 368, 407, 463, 91, , 95
ESP10, 195, 262, 370, 409, 465, 95, , 99
ESP10, 195, 261, 370, 409, 465, 98, , 102
ESP10, 190, 253, 365, 403, 459, 101, , 105
ESP10, 187, 252, 364, 401, 456, 105, , 109
ESP10, 191, 268, 369, 405, 461, 108, , 112
ESP10, 190, 274, 368, 404, 460, 111, , 115
ESP10, 189, 274, 366, 413, 461, 115, , 119
ESP10, 185, 267, 359, 409, 457, 118, , 122
ESP10, 176, 253, 345, 397, 443, 121, , 125
ESP10, 168, 243, 337, 394, 437, 125, , 129
ESP10, 173, 246, 342, 396, 440, 128, , 132
ESP10, 179, 247, 342, 398, 441, 131, , 135
ESP10, 185, 252, 346, 401, 444, 135, , 139
ESP10, 176, 245, 339, 395, 438, 138, , 142
ESP10, 184, 258, 345, 401, 443, 141, , 145
ESP10, 184, 259, 347, 401, 443, 145, , 149
ESP10, 194, 270, 359, 409, 451, 148, , 152
ESP10, 193, 273, 358, 409, 450, 151, , 155
ESP10, 191, 271, 355, 406, 448, 155, , 159
ESP10, 196, 272, 356, 409, 449, 158, , 162
ESP10, 198, 278, 358, 411, 450, 161, , 165
ESP10, 193, 276, 351, 408, 445, 165, , 169
ESP10, 179, 262, 338, 398, 434, 168, , 172
ESP10, 176, 262, 338, 400, 434, 171, , 175
ESP10, 172, 258, 333, 398, 432, 175, , 179
ESP10, 181, 264, 338, 403, 442, 178, , 182
ESP10, 186, 268, 340, 406, 452, 181, , 185
ESP10, 189, 270, 341, 407, 458, 185, , 189
ESP10, 195, 273, 343, 409, 464, 188, , 192
ESP10, 192, 275, 344, 405, 462, 191, , 195
ESP10, 184, 270, 337, 398, 457, 195, , 199
ESP10, 193, 272, 338, 399, 459, 198, , 202
ESP10, 201, 276, 344, 404, 462, 201, , 205
ESP10, 217, 292, 356, 414, 473, 205, , 209
ESP10, 226, 303, 358, 415, 474, 208, , 212
ESP10, 224, 301, 361, 411, 471, 211, , 215
ESP10, 233, 305, 366, 418, 475, 215, , 219
ESP10, 237, 310, 370, 422, 478, 218, , 222
ESP10, 240, 311, 376, 423, 481, 221, , 225
ESP10, 242, 312, 380, 424, 485, 225, , 229
ESP10, 249, 320, 383, 427, 489, 228, , 232
ESP10, 254, 318, 380, 424, 488, 231, , 235
ESP10, 252, 315, 376, 423, 487, 235, , 239
ESP10, 254, 319, 375, 421, 486, 238, , 242
ESP10, 250, 316, 374, 422, 482, 241, , 245
ESP10, 261, 323, 388, 434, 492, 245, , 249
ESP10, 264, 326, 392, 438, 493, 248, , 252
ESP10, 266, 328, 392, 439, 494, 251, , 255
ESP10, 270, 330, 391, 440, 493, 255, , 259
ESP10, 265, 324, 387, 434, 488, 258, , 262
ESP10, 264, 325, 387, 438, 487, 261, , 265
ESP10, 270, 333, 392, 452, 491, 265, , 269
ESP10, 253, 320, 381, 440, 479, 268, , 272
ESP10, 248, 315, 374, 434, 472, 271, , 275
ESP10, 259, 324, 386, 439, 477, 275, , 279
ESP10, 250, 315, 380, 429, 473, 278, , 282
ESP10, 248, 312, 376, 422, 470, 281, , 285
ESP10, 251, 311, 374, 421, 472, 285, , 289
ESP10, 248, 300, 365, 411, 464, 288, , 292
ESP10, 243, 294, 358, 407, 459, 291, , 295
ESP10, 264, 312, 373, 420, 473, 295, , 299
ESP10, 269, 311, 372, 418, 471, 298, , 302
ESP10, 272, 303, 365, 413, 464, 301, , 305
ESP10, 271, 293, 358, 406, 461, 305, , 309
ESP10, 258, 280, 346, 405, 456, 308, , 312
ESP10, 244, 272, 336, 397, 448, 311, , 315
ESP10, 243, 272, 336, 402, 448, 315, , 319
ESP10, 251, 280, 345, 408, 459, 318, , 322
ESP10, 241, 269, 334, 402, 452, 321, , 325
ESP10, 236, 266, 326, 398, 446, 325, , 329
ESP10, 244, 285, 334, 405, 454, 328, , 332
ESP10, 246, 295, 336, 405, 454, 331, , 335
ESP10, 251, 297, 340, 406, 455, 335, , 339
ESP10, 255, 296, 337, 403, 450, 338, , 342
ESP10, 261, 301, 350, 410, 453, 341, , 345
ESP10, 268, 306, 355, 420, 458, 345, , 349
ESP10, 269, 304, 355, 421, 457, 348, , 352
ESP10, 265, 300, 353, 417, 453, 351, , 355
ESP10, 265, 303, 354, 416, 452, 355, , 359
ESP10, 269, 304, 360, 415, 452, 358, , 362
ESP10, 273, 308, 365, 419, 459, 361, , 365
ESP10, 271, 302, 359, 414, 456, 365, , 369
ESP10, 277, 304, 360, 414, 457, 368, , 372
ESP10, 285, 310, 363, 417, 461, 371, , 375
ESP10, 284, 313, 367, 415, 461, 375, , 379
ESP10, 284, 304, 360, 408, 455, 378, , 382
ESP10, 282, 303, 360, 407, 453, 381, , 385
ESP10, 281, 307, 357, 404, 451, 385, , 389
ESP10, 279, 313, 354, 402, 449, 388, , 392
ESP10, 279, 315, 354, 403, 449, 391, , 395
ESP10, 283, 319, 355, 407, 450, 395, , 399
ESP10, 286, 326, 363, 411, 452, 398, , 402
ESP10, 290, 329, 365, 412, 451, 401, , 405
ESP10, 293, 335, 366, 418, 451, 405, , 409
ESP10, 302, 343, 369, 418, 452, 408, , 412
ESP10, 303, 343, 371, 421, 452, 411, , 415
ESP10, 304, 342, 372, 420, 451, 415, , 419
ESP10, 311, 346, 380, 428, 454, 418, , 422
ESP10, 314, 346, 380, 428, 454, 421, , 425
ESP10, 311, 342, 379, 425, 451, 425, , 429
ESP10, 319, 347, 384, 431, 455, 428, , 432
ESP10, 326, 347, 385, 432, 458, 431, , 435
ESP10, 327, 351, 387, 433, 462, 435, , 439
ESP10, 325, 355, 385, 436, 461, 438, , 442
ESP10, 329, 358, 387, 438, 463, 441, , 445
ESP10, 330, 359, 388, 440, 463, 445, , 449
ESP10, 331, 360, 390, 441, 463, 448, , 452
ESP10, 331, 363, 391, 442, 463, 451, , 455
ESP10, 331, 365, 392, 443, 464, 455, , 459
ESP10, 332, 365, 394, 445, 464, 458, , 462
ESP10, 334, 365, 395, 444, 463, 461, , 465
ESP10, 334, 370, 399, 445, 463, 465, , 469
ESP10, 339, 373, 402, 448, 464, 468, , 472
ESP10, 342, 374, 405, 450, 465, 471, , 475
ESP10, 340, 372, 402, 448, 463, 475, , 479
ESP10, 341, 374, 403, 450, 465, 478, , 482
ESP10, 337, 369, 397, 445, 460, 481, , 485
ESP10, 338, 368, 399, 443, 460, 485, , 489
ESP10, 343, 372, 403, 446, 464, 488, , 492
ESP10, 349, 383, 415, 451, 469, 491, , 495
ESP10, 351, 381, 412, 447, 466, 495, , 499
ESP10, 350, 380, 418, 444, 463, 498, , 502
ESP10, 352, 377, 415, 441, 463, 501, , 505
ESP10, 352, 377, 414, 441, 460, 505, , 509
ESP10, 353, 377, 412, 442, 462, 508, , 512
ESP10, 357, 380, 417, 445, 464, 511, , 515
ESP10, 361, 387, 418, 446, 467, 515, , 519
ESP10, 366, 392, 422, 450, 474, 518, , 522
ESP10, 365, 391, 421, 454, 474, 521, , 525
ESP10, 358, 383, 412, 449, 472, 525, , 529
ESP10, 359, 385, 413, 448, 473, 528, , 532
ESP10, 346, 370, 405, 437, 462, 531, , 535
ESP10, 362, 387, 419, 450, 477, 535, , 539
ESP10, 365, 389, 420, 451, 476, 538, , 542
ESP10, 371, 391, 423, 453, 476, 541, , 545
ESP10, 379, 400, 429, 460, 483, 545, , 549
ESP10, 376, 396, 425, 456, 480, 548, , 552
ESP10, 376, 396, 430, 455, 478, 551, , 555
ESP10, 376, 396, 428, 454, 477, 555, , 559
ESP10, 382, 402, 434, 461, 482, 558, , 562
ESP10, 375, 397, 431, 454, 476, 561, , 565
ESP10, 370, 394, 428, 451, 472, 565, , 569
ESP10, 369, 393, 428, 452, 471, 568, , 572
ESP10, 381, 399, 435, 460, 475, 571, , 575
ESP10, 384, 402, 437, 462, 476, 575, , 579
ESP10, 385, 401, 439, 460, 476, 578, , 582
ESP10, 384, 401, 433, 460, 470, 581, , 585
ESP10, 393, 409, 438, 464, 475, 585, , 589
ESP10, 393, 412, 438, 463, 475, 588, , 592
ESP10, 395, 412, 437, 464, 474, 591, , 595
ESP10, 393, 410, 439, 462, 474, 595, , 599
ESP10, 396, 414, 439, 464, 476, 598, , 602
ESP10, 405, 422, 448, 473, 483, 601, , 605
ESP10, 403, 420, 446, 471, 485, 605, , 609
ESP10, 394, 412, 439, 463, 477, 608, , 612
ESP10, 409, 428, 451, 476, 489, 611, , 615
ESP10, 411, 430, 453, 478, 491, 615, , 619
ESP10, 412, 430, 455, 479, 490, 618, , 622
ESP10, 414, 431, 460, 480, 489, 621, , 625
ESP10, 412, 427, 457, 477, 485, 625, , 629
ESP10, 418, 432, 460, 480, 490, 628, , 632
ESP10, 431, 439, 466, 486, 495, 631, , 635
ESP10, 432, 443, 466, 488, 495, 635, , 639
ESP10, 432, 446, 469, 488, 495, 638, , 642
ESP10, 435, 454, 471, 491, 498, 641, , 645
ESP10, 432, 454, 472, 491, 496, 645, , 649
ESP10, 419, 444, 461, 479, 485, 648, , 652
ESP10, 415, 441, 460, 475, 482, 651, , 655
ESP10, 423, 446, 464, 478, 484, 655, , 659
ESP10, 419, 441, 461, 474, 484, 658, , 662
ESP10, 423, 442, 462, 474, 484, 661, , 665
ESP10, 426, 445, 468, 477, 488, 665, , 669
ESP10, 425, 449, 467, 477, 488, 668, , 672
ESP10, 424, 449, 468, 478, 487, 671, , 675
ESP10, 426, 449, 470, 478, 487, 675, , 679
ESP10, 429, 448, 469, 479, 486, 678, , 682
ESP10, 438, 454, 474, 486, 492, 681, , 685
ESP10, 436, 451, 470, 484, 491, 685, , 689
ESP10, 435, 452, 471, 484, 492, 688, , 692
ESP10, 435, 451, 469, 483, 490, 691, , 695
ESP10, 439, 458, 475, 486, 493, 695, , 699
ESP10, 432, 449, 466, 479, 487, 698, , 702
ESP10, 440, 456, 473, 486, 493, 701, , 705
ESP10, 441, 459, 472, 485, 492, 705, , 709
ESP10, 432, 453, 468, 477, 484, 708, , 712
ESP10, 430, 451, 467, 476, 484, 711, , 715
ESP10, 424, 442, 457, 467, 476, 715, , 719
ESP10, 429, 449, 461, 469, 477, 718, , 722
ESP10, 428, 452, 463, 469, 478, 721, , 725
ESP10, 427, 452, 461, 469, 478, 725, , 729
ESP10, 426, 451, 463, 469, 477, 728, , 732
ESP10, 427, 447, 459, 466, 474, 731, , 735
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ESP10
HEFS
ESP0
Data Files
/chpsesp/ensemble/natural/ARKI1N_SQIN.ESPF10.csv
ARKI1N_SQIN.ESPF0.csv|2026-04-18
ARKI1N_SQIN.ESPF10.csv|2026-04-18
ARKI1N_SQIN.ESPFM.csv|2026-04-18
APR-SEP
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ESP10,ESPM,ESP0
ESP10,ESPM,ESP0
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