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Archive:
Water Year
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BITTERROOT - NEAR MISSOULA
(
BITM8
)
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
1193
1195
93
1201
1289
APR-JUL
1103
1103
93
1103
1191
APR-AUG
1145
1145
92
1146
1241
JAN-SEP
1546
1548
104
1554
1484
JAN-JUL
1456
1456
105
1456
1385
OCT-SEP
1828
1830
110
1836
1669
Experimental Water Supply
HEFS with 15 days EQPF
Ensemble:
2026-08-15
Issued:
2026-08-15
Hide Forecast
APR-SEP
1193
1195
93
1201
1289
APR-JUL
1103
1103
93
1103
1191
APR-AUG
1145
1145
92
1146
1241
JAN-SEP
1546
1548
104
1554
1484
JAN-JUL
1456
1456
105
1456
1385
OCT-SEP
1829
1831
110
1836
1669
Reference
ESP with 0 Days QPF
Ensemble:
2026-08-15
Issued:
2026-08-15
Hide Forecast
APR-SEP
1192
1195
93
1203
1289
APR-JUL
1103
1103
93
1103
1191
APR-AUG
1144
1145
92
1147
1241
JAN-SEP
1546
1548
104
1556
1484
JAN-JUL
1456
1456
105
1456
1385
OCT-SEP
1828
1831
110
1838
1669
Move the mouse over the desired "Forecast Period" to display a graph.
ESP10, 235, 335, 389, 438, 455, 70, , 74
ESP10, 232, 332, 389, 435, 455, 72, , 76
ESP10, 234, 334, 392, 440, 460, 74, , 78
ESP10, 232, 332, 390, 438, 458, 76, , 80
ESP10, 229, 330, 389, 437, 456, 78, , 82
ESP10, 230, 331, 389, 436, 457, 81, , 85
ESP10, 220, 321, 380, 428, 451, 83, , 87
ESP10, 229, 335, 391, 436, 459, 85, , 89
ESP10, 226, 334, 386, 433, 455, 87, , 91
ESP10, 223, 332, 384, 431, 454, 89, , 93
ESP10, 211, 320, 377, 423, 445, 91, , 95
ESP10, 226, 336, 389, 434, 457, 93, , 97
ESP10, 222, 326, 381, 426, 450, 95, , 99
ESP10, 229, 330, 383, 432, 453, 97, , 101
ESP10, 225, 325, 380, 430, 449, 99, , 103
ESP10, 217, 316, 371, 424, 442, 102, , 106
ESP10, 210, 313, 367, 421, 436, 104, , 108
ESP10, 206, 308, 363, 420, 436, 106, , 110
ESP10, 201, 304, 358, 418, 435, 108, , 112
ESP10, 205, 306, 359, 419, 438, 110, , 114
ESP10, 196, 298, 352, 413, 433, 112, , 116
ESP10, 194, 300, 352, 418, 433, 114, , 118
ESP10, 186, 294, 348, 414, 432, 116, , 120
ESP10, 193, 302, 357, 420, 438, 118, , 122
ESP10, 204, 312, 374, 432, 447, 120, , 124
ESP10, 215, 323, 387, 444, 459, 122, , 126
ESP10, 226, 334, 400, 452, 467, 125, , 129
ESP10, 231, 340, 404, 456, 472, 127, , 131
ESP10, 228, 338, 403, 454, 470, 129, , 133
ESP10, 209, 316, 386, 439, 459, 131, , 135
ESP10, 217, 321, 392, 442, 462, 133, , 137
ESP10, 232, 325, 393, 442, 462, 135, , 139
ESP10, 238, 336, 402, 447, 465, 137, , 141
ESP10, 245, 346, 407, 452, 469, 139, , 143
ESP10, 244, 347, 406, 452, 469, 141, , 145
ESP10, 247, 351, 408, 454, 471, 143, , 147
ESP10, 240, 350, 402, 448, 466, 145, , 149
ESP10, 237, 350, 399, 445, 464, 148, , 152
ESP10, 242, 356, 404, 449, 468, 150, , 154
ESP10, 242, 355, 404, 447, 467, 152, , 156
ESP10, 247, 362, 410, 453, 474, 154, , 158
ESP10, 255, 373, 417, 460, 482, 156, , 160
ESP10, 255, 372, 417, 461, 482, 158, , 162
ESP10, 251, 366, 413, 457, 479, 160, , 164
ESP10, 248, 359, 408, 453, 475, 162, , 166
ESP10, 253, 356, 407, 454, 475, 164, , 168
ESP10, 258, 357, 409, 455, 477, 166, , 170
ESP10, 267, 365, 416, 462, 483, 169, , 173
ESP10, 278, 365, 418, 463, 485, 171, , 175
ESP10, 275, 360, 411, 457, 481, 173, , 177
ESP10, 271, 358, 409, 454, 477, 175, , 179
ESP10, 270, 358, 405, 450, 473, 177, , 181
ESP10, 276, 357, 404, 449, 471, 179, , 183
ESP10, 284, 363, 411, 454, 476, 181, , 185
ESP10, 274, 356, 407, 450, 477, 183, , 187
ESP10, 277, 357, 409, 450, 479, 185, , 189
ESP10, 266, 349, 401, 445, 473, 187, , 191
ESP10, 272, 353, 403, 449, 475, 189, , 193
ESP10, 283, 362, 410, 454, 481, 192, , 196
ESP10, 261, 342, 394, 441, 466, 194, , 198
ESP10, 240, 317, 375, 430, 450, 196, , 200
ESP10, 249, 326, 379, 432, 453, 198, , 202
ESP10, 222, 302, 356, 414, 435, 200, , 204
ESP10, 195, 275, 335, 394, 416, 202, , 206
ESP10, 198, 277, 338, 396, 418, 204, , 208
ESP10, 188, 263, 320, 384, 407, 206, , 210
ESP10, 189, 263, 321, 385, 408, 208, , 212
ESP10, 190, 265, 321, 384, 409, 210, , 214
ESP10, 194, 267, 323, 389, 416, 212, , 216
ESP10, 187, 257, 313, 381, 408, 215, , 219
ESP10, 200, 275, 329, 392, 422, 217, , 221
ESP10, 196, 275, 323, 388, 423, 219, , 223
ESP10, 195, 275, 323, 388, 426, 221, , 225
ESP10, 206, 286, 335, 396, 432, 223, , 227
ESP10, 206, 286, 332, 394, 431, 225, , 229
ESP10, 209, 290, 336, 396, 433, 227, , 231
ESP10, 208, 291, 332, 392, 429, 229, , 233
ESP10, 218, 296, 339, 400, 432, 231, , 235
ESP10, 234, 297, 343, 405, 433, 233, , 237
ESP10, 239, 297, 339, 402, 430, 236, , 240
ESP10, 240, 296, 337, 399, 428, 238, , 242
ESP10, 245, 297, 340, 402, 429, 240, , 244
ESP10, 251, 301, 344, 406, 432, 242, , 246
ESP10, 254, 305, 345, 408, 432, 244, , 248
ESP10, 250, 301, 339, 404, 429, 246, , 250
ESP10, 252, 300, 339, 402, 430, 248, , 252
ESP10, 252, 301, 340, 402, 429, 250, , 254
ESP10, 257, 306, 346, 414, 433, 252, , 256
ESP10, 258, 309, 354, 416, 434, 254, , 258
ESP10, 256, 308, 356, 414, 432, 256, , 260
ESP10, 271, 326, 378, 425, 442, 259, , 263
ESP10, 265, 325, 377, 422, 440, 261, , 265
ESP10, 268, 324, 378, 419, 440, 263, , 267
ESP10, 267, 325, 375, 416, 443, 265, , 269
ESP10, 260, 317, 368, 411, 439, 267, , 271
ESP10, 264, 324, 368, 413, 440, 269, , 273
ESP10, 259, 321, 365, 409, 439, 271, , 275
ESP10, 271, 324, 368, 413, 442, 273, , 277
ESP10, 261, 312, 361, 402, 434, 275, , 279
ESP10, 275, 312, 360, 403, 433, 277, , 281
ESP10, 278, 314, 361, 405, 434, 279, , 283
ESP10, 281, 314, 361, 407, 434, 282, , 286
ESP10, 281, 316, 362, 408, 434, 284, , 288
ESP10, 287, 315, 362, 410, 433, 286, , 290
ESP10, 296, 319, 366, 411, 435, 288, , 292
ESP10, 296, 319, 365, 410, 434, 290, , 294
ESP10, 296, 315, 365, 406, 432, 292, , 296
ESP10, 299, 319, 368, 408, 433, 294, , 298
ESP10, 300, 320, 370, 406, 432, 296, , 300
ESP10, 309, 333, 379, 413, 438, 298, , 302
ESP10, 310, 334, 378, 414, 439, 300, , 304
ESP10, 316, 338, 382, 418, 442, 303, , 307
ESP10, 321, 338, 384, 418, 442, 305, , 309
ESP10, 325, 340, 387, 420, 445, 307, , 311
ESP10, 328, 341, 387, 420, 447, 309, , 313
ESP10, 332, 342, 389, 421, 448, 311, , 315
ESP10, 337, 345, 391, 421, 449, 313, , 317
ESP10, 336, 346, 390, 421, 451, 315, , 319
ESP10, 334, 349, 388, 420, 452, 317, , 321
ESP10, 335, 351, 389, 423, 453, 319, , 323
ESP10, 336, 356, 390, 427, 454, 321, , 325
ESP10, 327, 346, 381, 421, 445, 323, , 327
ESP10, 330, 348, 385, 424, 447, 326, , 330
ESP10, 327, 343, 381, 421, 444, 328, , 332
ESP10, 330, 346, 383, 425, 445, 330, , 334
ESP10, 335, 348, 383, 426, 448, 332, , 336
ESP10, 334, 348, 380, 424, 449, 334, , 338
ESP10, 332, 348, 384, 423, 449, 336, , 340
ESP10, 337, 356, 393, 428, 455, 338, , 342
ESP10, 335, 360, 391, 427, 453, 340, , 344
ESP10, 329, 357, 386, 424, 451, 342, , 346
ESP10, 327, 353, 384, 422, 451, 344, , 348
ESP10, 332, 354, 385, 421, 451, 346, , 350
ESP10, 341, 356, 382, 418, 448, 349, , 353
ESP10, 342, 360, 383, 419, 449, 351, , 355
ESP10, 338, 357, 381, 416, 446, 353, , 357
ESP10, 332, 353, 375, 414, 442, 355, , 359
ESP10, 327, 348, 370, 410, 439, 357, , 361
ESP10, 325, 344, 368, 407, 434, 359, , 363
ESP10, 329, 347, 374, 409, 438, 361, , 365
ESP10, 322, 340, 369, 403, 435, 363, , 367
ESP10, 334, 352, 385, 413, 444, 365, , 369
ESP10, 337, 356, 388, 414, 446, 367, , 371
ESP10, 331, 353, 383, 409, 443, 370, , 374
ESP10, 336, 355, 385, 414, 446, 372, , 376
ESP10, 336, 357, 387, 415, 444, 374, , 378
ESP10, 337, 362, 389, 417, 444, 376, , 380
ESP10, 325, 353, 381, 410, 436, 378, , 382
ESP10, 319, 345, 380, 404, 431, 380, , 384
ESP10, 305, 333, 370, 392, 419, 382, , 386
ESP10, 317, 349, 382, 401, 427, 384, , 388
ESP10, 314, 347, 378, 398, 426, 386, , 390
ESP10, 314, 348, 376, 399, 426, 388, , 392
ESP10, 304, 337, 373, 390, 418, 390, , 394
ESP10, 300, 327, 364, 382, 410, 393, , 397
ESP10, 302, 327, 363, 379, 412, 395, , 399
ESP10, 287, 312, 351, 366, 400, 397, , 401
ESP10, 286, 310, 349, 363, 401, 399, , 403
ESP10, 258, 287, 324, 338, 377, 401, , 405
ESP10, 287, 315, 346, 362, 399, 403, , 407
ESP10, 273, 301, 334, 349, 387, 405, , 409
ESP10, 256, 284, 319, 334, 372, 407, , 411
ESP10, 274, 303, 333, 350, 388, 409, , 413
ESP10, 270, 298, 329, 344, 383, 411, , 415
ESP10, 272, 299, 328, 347, 387, 413, , 417
ESP10, 265, 289, 321, 340, 379, 416, , 420
ESP10, 262, 286, 319, 336, 373, 418, , 422
ESP10, 266, 297, 326, 343, 378, 420, , 424
ESP10, 273, 306, 332, 351, 384, 422, , 426
ESP10, 282, 312, 337, 356, 391, 424, , 428
ESP10, 286, 311, 336, 357, 390, 426, , 430
ESP10, 294, 321, 352, 369, 399, 428, , 432
ESP10, 296, 322, 351, 370, 399, 430, , 434
ESP10, 286, 317, 342, 363, 390, 432, , 436
ESP10, 287, 320, 341, 365, 390, 434, , 438
ESP10, 293, 318, 348, 363, 389, 437, , 441
ESP10, 306, 332, 362, 376, 401, 439, , 443
ESP10, 301, 330, 359, 374, 399, 441, , 445
ESP10, 302, 332, 359, 377, 399, 443, , 447
ESP10, 299, 330, 356, 375, 400, 445, , 449
ESP10, 311, 340, 366, 386, 411, 447, , 451
ESP10, 319, 352, 372, 395, 417, 449, , 453
ESP10, 317, 347, 368, 390, 411, 451, , 455
ESP10, 323, 353, 374, 397, 419, 453, , 457
ESP10, 323, 355, 373, 396, 419, 455, , 459
ESP10, 321, 351, 371, 391, 413, 457, , 461
ESP10, 325, 354, 373, 396, 415, 460, , 464
ESP10, 326, 349, 368, 392, 411, 462, , 466
ESP10, 318, 342, 362, 385, 402, 464, , 468
ESP10, 312, 341, 359, 381, 399, 466, , 470
ESP10, 299, 331, 350, 372, 390, 468, , 472
ESP10, 306, 337, 354, 377, 397, 470, , 474
ESP10, 304, 335, 351, 375, 395, 472, , 476
ESP10, 323, 357, 370, 392, 413, 474, , 478
ESP10, 315, 347, 365, 384, 405, 476, , 480
ESP10, 325, 354, 372, 390, 411, 478, , 482
ESP10, 334, 359, 381, 398, 419, 480, , 484
ESP10, 346, 374, 394, 408, 428, 483, , 487
ESP10, 348, 379, 396, 410, 431, 485, , 489
ESP10, 347, 377, 394, 409, 428, 487, , 491
ESP10, 342, 374, 391, 404, 424, 489, , 493
ESP10, 341, 374, 391, 404, 424, 491, , 495
ESP10, 339, 374, 390, 404, 423, 493, , 497
ESP10, 339, 373, 393, 403, 421, 495, , 499
ESP10, 335, 369, 390, 400, 419, 497, , 501
ESP10, 333, 368, 390, 402, 420, 499, , 503
ESP10, 335, 369, 390, 400, 418, 501, , 505
ESP10, 340, 371, 391, 400, 418, 504, , 508
ESP10, 347, 377, 394, 402, 420, 506, , 510
ESP10, 347, 376, 394, 402, 419, 508, , 512
ESP10, 351, 378, 394, 404, 419, 510, , 514
ESP10, 354, 383, 396, 407, 422, 512, , 516
ESP10, 354, 383, 398, 410, 422, 514, , 518
ESP10, 354, 384, 401, 411, 425, 516, , 520
ESP10, 355, 384, 401, 414, 426, 518, , 522
ESP10, 349, 377, 395, 408, 418, 520, , 524
ESP10, 348, 378, 394, 407, 417, 522, , 526
ESP10, 347, 377, 395, 408, 417, 524, , 528
ESP10, 347, 380, 395, 407, 417, 527, , 531
ESP10, 346, 379, 394, 406, 418, 529, , 533
ESP10, 349, 380, 397, 408, 420, 531, , 535
ESP10, 348, 379, 392, 404, 414, 533, , 537
ESP10, 361, 391, 401, 413, 421, 535, , 539
ESP10, 362, 394, 402, 413, 422, 537, , 541
ESP10, 358, 389, 399, 409, 421, 539, , 543
ESP10, 360, 392, 400, 410, 423, 541, , 545
ESP10, 361, 394, 402, 411, 426, 543, , 547
ESP10, 362, 395, 404, 412, 427, 545, , 549
ESP10, 370, 397, 407, 416, 429, 547, , 551
ESP10, 370, 397, 411, 418, 429, 550, , 554
ESP10, 363, 390, 404, 413, 423, 552, , 556
ESP10, 360, 387, 398, 407, 418, 554, , 558
ESP10, 368, 389, 402, 410, 422, 556, , 560
ESP10, 361, 383, 396, 404, 414, 558, , 562
ESP10, 358, 379, 394, 401, 410, 560, , 564
ESP10, 362, 389, 396, 406, 412, 562, , 566
ESP10, 360, 388, 396, 405, 411, 564, , 568
ESP10, 360, 388, 398, 406, 409, 566, , 570
ESP10, 361, 388, 395, 402, 406, 568, , 572
ESP10, 366, 387, 397, 404, 406, 571, , 575
ESP10, 384, 404, 411, 415, 418, 573, , 577
ESP10, 376, 397, 405, 410, 413, 575, , 579
ESP10, 373, 395, 402, 408, 411, 577, , 581
ESP10, 382, 398, 403, 409, 411, 579, , 583
ESP10, 386, 395, 402, 408, 412, 581, , 585
ESP10, 382, 392, 400, 405, 409, 583, , 587
ESP10, 378, 392, 398, 403, 406, 585, , 589
ESP10, 383, 397, 402, 407, 409, 587, , 591
ESP10, 392, 402, 406, 411, 411, 589, , 593
ESP10, 397, 403, 406, 409, 410, 591, , 595
ESP10, 395, 403, 406, 411, 412, 594, , 598
ESP10, 392, 399, 404, 407, 408, 596, , 600
ESP10, 401, 408, 411, 411, 412, 598, , 602
ESP10, 402, 408, 411, 412, 412, 600, , 604
ESP10, 402, 408, 410, 411, 412, 602, , 606
ESP10, 403, 408, 410, 411, 411, 604, , 608
ESP10, 404, 408, 409, 410, 411, 606, , 610
ESP10, 403, 405, 406, 407, 407, 608, , 612
ESP10, 400, 402, 403, 404, 405, 610, , 614
ESP10, 396, 399, 400, 401, 401, 612, , 616
ESP10, 397, 399, 399, 400, 401, 614, , 618
ESP10, 397, 399, 399, 400, 400, 617, , 621
ESP10, 396, 399, 399, 400, 400, 619, , 623
ESP10, 394, 396, 397, 397, 398, 621, , 625
ESP10, 392, 395, 396, 396, 397, 623, , 627
ESP10, 393, 395, 396, 396, 397, 625, , 629
ESP10, 389, 392, 392, 393, 393, 627, , 631
ESP10, 385, 387, 387, 388, 388, 629, , 633
ESP10, 377, 379, 379, 380, 381, 631, , 635
ESP10, 342, 346, 347, 347, 348, 633, , 637
ESP10, 357, 359, 360, 360, 361, 635, , 639
ESP10, 364, 365, 366, 366, 367, 638, , 642
ESP10, 373, 374, 374, 375, 375, 640, , 644
ESP10, 371, 372, 373, 374, 374, 642, , 646
ESP10, 372, 373, 374, 375, 375, 644, , 648
ESP10, 376, 377, 377, 378, 378, 646, , 650
ESP10, 376, 377, 377, 378, 378, 648, , 652
ESP10, 376, 377, 377, 378, 378, 650, , 654
ESP10, 376, 376, 377, 378, 378, 652, , 656
ESP10, 376, 377, 377, 378, 378, 654, , 658
ESP10, 376, 377, 377, 378, 378, 656, , 660
ESP10, 375, 376, 377, 377, 378, 658, , 662
ESP10, 375, 376, 377, 377, 377, 661, , 665
ESP10, 375, 376, 377, 377, 378, 663, , 667
ESP10, 375, 376, 377, 377, 377, 665, , 669
ESP10, 375, 376, 377, 377, 377, 667, , 671
ESP10, 375, 376, 377, 377, 377, 669, , 673
ESP10, 375, 376, 377, 377, 377, 671, , 675
ESP10, 374, 376, 376, 377, 377, 673, , 677
ESP10, 375, 376, 377, 377, 378, 675, , 679
ESP10, 375, 377, 377, 378, 378, 677, , 681
ESP10, 376, 377, 377, 378, 378, 679, , 683
ESP10, 376, 377, 377, 378, 378, 681, , 685
ESP10, 376, 377, 378, 378, 378, 684, , 688
ESP10, 376, 377, 378, 378, 379, 686, , 690
ESP10, 376, 377, 378, 378, 379, 688, , 692
ESP10, 379, 380, 380, 381, 381, 690, , 694
ESP10, 380, 381, 381, 382, 382, 692, , 696
ESP10, 380, 381, 382, 382, 382, 694, , 698
ESP10, 380, 381, 382, 382, 382, 696, , 700
ESP10, 380, 381, 382, 382, 382, 698, , 702
ESP10, 381, 382, 382, 383, 383, 700, , 704
ESP10, 381, 382, 383, 383, 383, 702, , 706
ESP10, 381, 382, 382, 382, 383, 705, , 709
ESP10, 381, 382, 382, 383, 383, 707, , 711
ESP10, 381, 382, 383, 383, 383, 709, , 713
ESP10, 381, 382, 383, 383, 383, 711, , 715
ESP10, 381, 382, 383, 383, 383, 713, , 717
ESP10, 381, 382, 383, 383, 383, 715, , 719
ESP10, 381, 383, 383, 383, 384, 717, , 721
ESP10, 381, 382, 383, 383, 383, 719, , 723
ESP10, 381, 382, 383, 383, 383, 721, , 725
ESP10, 381, 382, 383, 383, 383, 723, , 727
ESP10, 381, 382, 383, 383, 383, 725, , 729
ESP10, 381, 382, 383, 383, 383, 728, , 732
ESP10, 382, 383, 383, 383, 383, 730, , 734
ESP10, 381, 382, 383, 383, 383, 732, , 736
ESP10, 382, 383, 383, 383, 384, 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/BITM8W_SQIN.ESPF10.csv
BITM8W_SQIN.ESPF0.csv|2026-08-15
BITM8W_SQIN.ESPF10.csv|2026-08-15
BITM8W_SQIN.ESPFM.csv|2026-08-15
APR-SEP
BITTERROOT - NEAR MISSOULA
(
BITM8
)
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
841
1130
88
1911
1289
APR-JUL
757
1028
86
1788
1191
APR-AUG
799
1081
87
1854
1241
JAN-SEP
992
1301
88
2109
1484
JAN-JUL
907
1197
86
1986
1385
OCT-SEP
1156
1463
88
2280
1669
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/BITM8W_SQIN.ESPF10.csv
BITM8W_SQIN.ESPF0.csv|2026-08-15
BITM8W_SQIN.ESPF10.csv|2026-08-15
BITM8W_SQIN.ESPFM.csv|2026-08-15
APR-SEP
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ESP10,ESPM,ESP0
ESP10,ESPM,ESP0
Last Forecast
