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Water Year
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SF FLATHEAD - HUNGRY HORSE DAM
(
HHWM8
)
Forecasts for Water Year
2026
Official Water Supply
ESP with 10 Days QPF
Ensemble:
2026-07-13
Issued:
2026-07-13
Hide Forecast
Forecast
Period
Forecasts Are in KAF
30 Year
Average
(1991-2020)
90 %
50 %
%
Average
10 %
APR-SEP
1955
1959
94
1976
2088
APR-JUL
1856
1856
94
1856
1981
APR-AUG
1916
1917
94
1924
2043
JAN-SEP
2529
2534
108
2551
2343
JAN-JUL
2430
2430
109
2430
2236
OCT-SEP
3056
3060
119
3078
2567
Experimental Water Supply
HEFS with 15 days EQPF
Ensemble:
2026-07-13
Issued:
2026-07-13
Hide Forecast
APR-SEP
1956
1960
94
1984
2088
APR-JUL
1856
1856
94
1860
1981
APR-AUG
1915
1917
94
1930
2043
JAN-SEP
2530
2535
108
2559
2343
JAN-JUL
2430
2430
109
2434
2236
OCT-SEP
3057
3061
119
3085
2567
Reference
ESP with 0 Days QPF
Ensemble:
2026-07-13
Issued:
2026-07-13
Hide Forecast
APR-SEP
1954
1961
94
1989
2088
APR-JUL
1856
1856
94
1864
1981
APR-AUG
1915
1916
94
1930
2043
JAN-SEP
2529
2535
108
2564
2343
JAN-JUL
2430
2430
109
2439
2236
OCT-SEP
3055
3062
119
3090
2567
Move the mouse over the desired "Forecast Period" to display a graph.
ESP10, 249, 296, 376, 419, 449, 70, , 74
ESP10, 249, 294, 375, 417, 448, 73, , 77
ESP10, 250, 292, 374, 415, 447, 75, , 79
ESP10, 251, 291, 374, 415, 447, 77, , 81
ESP10, 255, 291, 375, 415, 447, 80, , 84
ESP10, 253, 289, 369, 411, 444, 82, , 86
ESP10, 250, 286, 368, 408, 443, 84, , 88
ESP10, 255, 292, 374, 413, 451, 87, , 91
ESP10, 253, 292, 373, 410, 452, 89, , 93
ESP10, 251, 290, 370, 407, 450, 91, , 95
ESP10, 250, 287, 363, 402, 447, 94, , 98
ESP10, 260, 295, 371, 408, 454, 96, , 100
ESP10, 260, 296, 373, 408, 457, 98, , 102
ESP10, 259, 295, 373, 408, 457, 101, , 105
ESP10, 256, 295, 372, 406, 454, 103, , 107
ESP10, 249, 288, 370, 401, 449, 105, , 109
ESP10, 246, 285, 367, 398, 447, 108, , 112
ESP10, 244, 288, 369, 399, 446, 110, , 114
ESP10, 243, 286, 369, 399, 445, 112, , 116
ESP10, 245, 288, 373, 402, 447, 115, , 119
ESP10, 239, 281, 366, 398, 441, 117, , 121
ESP10, 248, 285, 372, 402, 445, 119, , 123
ESP10, 244, 280, 368, 399, 440, 122, , 126
ESP10, 252, 285, 373, 404, 445, 124, , 128
ESP10, 255, 288, 374, 408, 447, 126, , 130
ESP10, 247, 279, 366, 399, 440, 129, , 133
ESP10, 247, 280, 367, 399, 440, 131, , 135
ESP10, 255, 284, 372, 402, 446, 133, , 137
ESP10, 253, 282, 370, 400, 447, 136, , 140
ESP10, 243, 271, 359, 389, 438, 138, , 142
ESP10, 251, 275, 362, 393, 441, 140, , 144
ESP10, 259, 280, 364, 397, 442, 143, , 147
ESP10, 257, 283, 364, 398, 440, 145, , 149
ESP10, 259, 286, 366, 402, 441, 147, , 151
ESP10, 259, 288, 367, 403, 440, 150, , 154
ESP10, 262, 290, 369, 406, 444, 152, , 156
ESP10, 264, 289, 369, 406, 444, 154, , 158
ESP10, 260, 286, 367, 402, 441, 157, , 161
ESP10, 261, 288, 369, 403, 445, 159, , 163
ESP10, 261, 288, 370, 406, 446, 161, , 165
ESP10, 265, 292, 374, 411, 449, 164, , 168
ESP10, 266, 292, 373, 410, 449, 166, , 170
ESP10, 267, 298, 374, 412, 451, 168, , 172
ESP10, 270, 305, 377, 418, 455, 171, , 175
ESP10, 269, 302, 375, 414, 451, 173, , 177
ESP10, 268, 303, 381, 414, 449, 175, , 179
ESP10, 261, 296, 376, 407, 441, 178, , 182
ESP10, 274, 310, 388, 419, 456, 180, , 184
ESP10, 269, 305, 384, 415, 453, 182, , 186
ESP10, 268, 308, 384, 414, 452, 185, , 189
ESP10, 261, 302, 376, 407, 443, 187, , 191
ESP10, 263, 305, 377, 408, 450, 189, , 193
ESP10, 253, 294, 368, 399, 440, 192, , 196
ESP10, 264, 303, 376, 406, 449, 194, , 198
ESP10, 248, 292, 363, 395, 434, 196, , 200
ESP10, 249, 294, 364, 398, 442, 199, , 203
ESP10, 244, 292, 362, 395, 437, 201, , 205
ESP10, 245, 291, 363, 395, 436, 203, , 207
ESP10, 249, 296, 365, 400, 440, 206, , 210
ESP10, 234, 282, 353, 387, 426, 208, , 212
ESP10, 219, 273, 341, 375, 412, 210, , 214
ESP10, 223, 281, 345, 378, 415, 213, , 217
ESP10, 201, 260, 328, 362, 397, 215, , 219
ESP10, 180, 240, 312, 347, 380, 217, , 221
ESP10, 182, 242, 313, 349, 381, 220, , 224
ESP10, 181, 238, 308, 345, 378, 222, , 226
ESP10, 200, 256, 328, 359, 391, 224, , 228
ESP10, 184, 245, 316, 347, 378, 227, , 231
ESP10, 174, 230, 303, 340, 362, 229, , 233
ESP10, 178, 228, 303, 340, 364, 231, , 235
ESP10, 179, 231, 306, 342, 364, 234, , 238
ESP10, 174, 229, 303, 340, 361, 236, , 240
ESP10, 179, 236, 309, 346, 368, 238, , 242
ESP10, 181, 238, 311, 349, 372, 241, , 245
ESP10, 189, 245, 316, 357, 379, 243, , 247
ESP10, 190, 245, 316, 357, 379, 245, , 249
ESP10, 196, 252, 323, 363, 386, 248, , 252
ESP10, 199, 252, 324, 362, 386, 250, , 254
ESP10, 213, 260, 331, 368, 393, 252, , 256
ESP10, 218, 260, 334, 368, 391, 255, , 259
ESP10, 227, 267, 335, 368, 395, 257, , 261
ESP10, 231, 272, 338, 370, 396, 259, , 263
ESP10, 234, 276, 343, 374, 398, 262, , 266
ESP10, 232, 276, 340, 372, 396, 264, , 268
ESP10, 231, 272, 337, 368, 394, 266, , 270
ESP10, 229, 270, 337, 368, 392, 269, , 273
ESP10, 231, 275, 338, 370, 396, 271, , 275
ESP10, 240, 278, 339, 374, 403, 273, , 277
ESP10, 246, 278, 341, 377, 404, 276, , 280
ESP10, 248, 280, 340, 377, 403, 278, , 282
ESP10, 246, 281, 339, 376, 400, 280, , 284
ESP10, 237, 273, 332, 367, 390, 283, , 287
ESP10, 238, 273, 332, 366, 391, 285, , 289
ESP10, 242, 274, 334, 366, 395, 287, , 291
ESP10, 236, 269, 329, 361, 393, 290, , 294
ESP10, 233, 270, 326, 359, 389, 292, , 296
ESP10, 229, 271, 325, 356, 387, 294, , 298
ESP10, 232, 277, 326, 358, 386, 297, , 301
ESP10, 245, 283, 334, 369, 394, 299, , 303
ESP10, 250, 287, 336, 371, 395, 301, , 305
ESP10, 253, 292, 339, 376, 397, 304, , 308
ESP10, 254, 295, 342, 377, 396, 306, , 310
ESP10, 256, 298, 344, 380, 396, 308, , 312
ESP10, 258, 297, 341, 377, 394, 311, , 315
ESP10, 259, 301, 343, 378, 394, 313, , 317
ESP10, 258, 299, 344, 377, 391, 315, , 319
ESP10, 259, 298, 342, 375, 389, 318, , 322
ESP10, 262, 299, 342, 375, 389, 320, , 324
ESP10, 259, 296, 339, 372, 388, 322, , 326
ESP10, 276, 309, 352, 384, 404, 325, , 329
ESP10, 275, 308, 354, 387, 405, 327, , 331
ESP10, 278, 310, 357, 390, 408, 329, , 333
ESP10, 277, 309, 358, 389, 406, 332, , 336
ESP10, 283, 315, 363, 396, 411, 334, , 338
ESP10, 280, 316, 362, 396, 410, 336, , 340
ESP10, 281, 322, 363, 397, 410, 339, , 343
ESP10, 282, 325, 364, 398, 411, 341, , 345
ESP10, 279, 325, 358, 392, 409, 343, , 347
ESP10, 279, 329, 356, 390, 412, 346, , 350
ESP10, 281, 328, 356, 389, 412, 348, , 352
ESP10, 285, 328, 359, 391, 413, 350, , 354
ESP10, 284, 322, 358, 387, 408, 353, , 357
ESP10, 287, 324, 361, 389, 411, 355, , 359
ESP10, 290, 328, 362, 389, 412, 357, , 361
ESP10, 296, 334, 368, 396, 414, 360, , 364
ESP10, 297, 337, 366, 395, 412, 362, , 366
ESP10, 299, 338, 364, 394, 413, 364, , 368
ESP10, 299, 337, 363, 393, 411, 367, , 371
ESP10, 296, 332, 360, 391, 406, 369, , 373
ESP10, 302, 335, 363, 397, 412, 371, , 375
ESP10, 301, 334, 360, 397, 411, 374, , 378
ESP10, 305, 335, 360, 398, 415, 376, , 380
ESP10, 302, 333, 363, 396, 413, 378, , 382
ESP10, 303, 334, 366, 394, 414, 381, , 385
ESP10, 301, 329, 363, 390, 413, 383, , 387
ESP10, 296, 325, 361, 391, 413, 385, , 389
ESP10, 296, 324, 360, 391, 413, 388, , 392
ESP10, 301, 326, 362, 397, 416, 390, , 394
ESP10, 300, 321, 358, 393, 413, 392, , 396
ESP10, 305, 322, 359, 394, 417, 395, , 399
ESP10, 303, 319, 358, 392, 413, 397, , 401
ESP10, 306, 321, 361, 393, 412, 399, , 403
ESP10, 303, 323, 360, 388, 407, 402, , 406
ESP10, 303, 326, 359, 387, 406, 404, , 408
ESP10, 305, 330, 360, 389, 406, 407, , 411
ESP10, 310, 336, 366, 393, 410, 409, , 413
ESP10, 313, 343, 370, 397, 414, 411, , 415
ESP10, 311, 342, 368, 395, 413, 414, , 418
ESP10, 306, 340, 367, 391, 409, 416, , 420
ESP10, 294, 333, 358, 382, 398, 418, , 422
ESP10, 300, 341, 364, 391, 404, 421, , 425
ESP10, 298, 339, 361, 391, 401, 423, , 427
ESP10, 291, 331, 354, 383, 395, 425, , 429
ESP10, 283, 324, 348, 378, 385, 428, , 432
ESP10, 281, 321, 343, 374, 379, 430, , 434
ESP10, 277, 313, 337, 366, 371, 432, , 436
ESP10, 269, 305, 329, 355, 364, 435, , 439
ESP10, 276, 312, 334, 361, 371, 437, , 441
ESP10, 262, 295, 319, 345, 357, 439, , 443
ESP10, 276, 309, 334, 357, 369, 442, , 446
ESP10, 288, 317, 343, 365, 377, 444, , 448
ESP10, 287, 317, 342, 364, 376, 446, , 450
ESP10, 293, 325, 349, 372, 383, 449, , 453
ESP10, 292, 326, 348, 371, 385, 451, , 455
ESP10, 289, 324, 346, 370, 386, 453, , 457
ESP10, 283, 319, 339, 363, 380, 456, , 460
ESP10, 279, 315, 334, 360, 377, 458, , 462
ESP10, 283, 319, 338, 365, 382, 460, , 464
ESP10, 288, 320, 341, 367, 387, 463, , 467
ESP10, 290, 323, 344, 368, 391, 465, , 469
ESP10, 291, 323, 347, 367, 390, 467, , 471
ESP10, 291, 326, 350, 369, 395, 470, , 474
ESP10, 298, 330, 355, 372, 401, 472, , 476
ESP10, 290, 320, 348, 361, 394, 474, , 478
ESP10, 296, 321, 351, 362, 396, 477, , 481
ESP10, 301, 321, 351, 359, 395, 479, , 483
ESP10, 298, 317, 349, 357, 391, 481, , 485
ESP10, 301, 320, 354, 361, 394, 484, , 488
ESP10, 299, 319, 352, 360, 392, 486, , 490
ESP10, 294, 314, 347, 359, 386, 488, , 492
ESP10, 294, 312, 345, 360, 384, 491, , 495
ESP10, 298, 317, 348, 363, 389, 493, , 497
ESP10, 296, 315, 347, 362, 387, 495, , 499
ESP10, 301, 323, 353, 371, 392, 498, , 502
ESP10, 302, 329, 354, 371, 394, 500, , 504
ESP10, 299, 326, 349, 368, 391, 502, , 506
ESP10, 300, 325, 350, 367, 390, 505, , 509
ESP10, 297, 324, 348, 366, 388, 507, , 511
ESP10, 294, 321, 349, 364, 386, 509, , 513
ESP10, 297, 318, 342, 359, 379, 512, , 516
ESP10, 297, 317, 340, 357, 377, 514, , 518
ESP10, 299, 320, 344, 361, 379, 516, , 520
ESP10, 322, 342, 368, 385, 402, 519, , 523
ESP10, 320, 340, 367, 382, 401, 521, , 525
ESP10, 321, 338, 366, 382, 400, 523, , 527
ESP10, 323, 339, 368, 383, 399, 526, , 530
ESP10, 314, 331, 359, 376, 391, 528, , 532
ESP10, 322, 343, 366, 382, 398, 530, , 534
ESP10, 320, 343, 369, 381, 398, 533, , 537
ESP10, 325, 350, 372, 384, 402, 535, , 539
ESP10, 326, 348, 370, 383, 399, 537, , 541
ESP10, 327, 350, 370, 386, 401, 540, , 544
ESP10, 327, 350, 371, 386, 401, 542, , 546
ESP10, 336, 361, 383, 398, 411, 544, , 548
ESP10, 327, 352, 376, 390, 403, 547, , 551
ESP10, 326, 352, 374, 392, 404, 549, , 553
ESP10, 321, 347, 371, 386, 400, 551, , 555
ESP10, 319, 342, 366, 380, 394, 554, , 558
ESP10, 320, 341, 367, 381, 393, 556, , 560
ESP10, 321, 345, 369, 383, 394, 558, , 562
ESP10, 323, 349, 370, 386, 399, 561, , 565
ESP10, 325, 351, 375, 390, 403, 563, , 567
ESP10, 327, 354, 378, 393, 405, 565, , 569
ESP10, 327, 355, 377, 393, 407, 568, , 572
ESP10, 329, 355, 376, 392, 407, 570, , 574
ESP10, 326, 354, 374, 390, 404, 572, , 576
ESP10, 324, 354, 371, 388, 402, 575, , 579
ESP10, 323, 353, 369, 386, 399, 577, , 581
ESP10, 322, 348, 367, 384, 396, 579, , 583
ESP10, 323, 347, 370, 385, 397, 582, , 586
ESP10, 325, 347, 371, 384, 396, 584, , 588
ESP10, 325, 347, 372, 383, 396, 586, , 590
ESP10, 328, 345, 369, 378, 388, 589, , 593
ESP10, 335, 347, 372, 382, 391, 591, , 595
ESP10, 322, 333, 359, 372, 380, 593, , 597
ESP10, 325, 338, 365, 377, 384, 596, , 600
ESP10, 321, 335, 358, 371, 380, 598, , 602
ESP10, 319, 335, 356, 367, 380, 600, , 604
ESP10, 321, 336, 357, 366, 379, 603, , 607
ESP10, 321, 338, 357, 370, 379, 605, , 609
ESP10, 316, 334, 350, 364, 373, 607, , 611
ESP10, 315, 333, 350, 362, 371, 610, , 614
ESP10, 317, 333, 351, 361, 370, 612, , 616
ESP10, 307, 325, 343, 349, 358, 614, , 618
ESP10, 316, 329, 347, 355, 362, 617, , 621
ESP10, 317, 334, 349, 358, 362, 619, , 623
ESP10, 314, 330, 346, 354, 358, 621, , 625
ESP10, 336, 350, 366, 373, 379, 624, , 628
ESP10, 302, 318, 331, 343, 348, 626, , 630
ESP10, 298, 313, 326, 338, 344, 628, , 632
ESP10, 311, 326, 336, 348, 356, 631, , 635
ESP10, 311, 330, 342, 350, 358, 633, , 637
ESP10, 309, 327, 340, 349, 354, 635, , 639
ESP10, 305, 325, 336, 346, 350, 638, , 642
ESP10, 306, 325, 337, 346, 349, 640, , 644
ESP10, 294, 312, 322, 330, 334, 642, , 646
ESP10, 302, 319, 329, 337, 340, 645, , 649
ESP10, 305, 320, 330, 338, 342, 647, , 651
ESP10, 326, 341, 349, 357, 360, 649, , 653
ESP10, 325, 336, 346, 352, 356, 652, , 656
ESP10, 327, 336, 348, 352, 356, 654, , 658
ESP10, 334, 343, 351, 355, 356, 656, , 660
ESP10, 337, 347, 353, 356, 357, 659, , 663
ESP10, 335, 346, 353, 355, 357, 661, , 665
ESP10, 335, 346, 353, 355, 356, 663, , 667
ESP10, 338, 349, 354, 356, 358, 666, , 670
ESP10, 338, 349, 354, 356, 358, 668, , 672
ESP10, 339, 350, 354, 356, 357, 670, , 674
ESP10, 335, 349, 352, 354, 355, 673, , 677
ESP10, 341, 351, 354, 356, 357, 675, , 679
ESP10, 344, 350, 354, 355, 356, 677, , 681
ESP10, 346, 350, 353, 354, 354, 680, , 684
ESP10, 345, 350, 352, 353, 353, 682, , 686
ESP10, 341, 347, 348, 349, 350, 684, , 688
ESP10, 339, 345, 346, 347, 347, 687, , 691
ESP10, 341, 346, 347, 348, 348, 689, , 693
ESP10, 334, 339, 339, 340, 341, 691, , 695
ESP10, 330, 335, 335, 336, 337, 694, , 698
ESP10, 325, 329, 330, 331, 331, 696, , 700
ESP10, 315, 319, 320, 322, 322, 698, , 702
ESP10, 320, 324, 325, 326, 326, 701, , 705
ESP10, 334, 337, 338, 339, 339, 703, , 707
ESP10, 332, 335, 336, 337, 337, 705, , 709
ESP10, 329, 333, 334, 335, 335, 708, , 712
ESP10, 330, 332, 333, 334, 335, 710, , 714
ESP10, 327, 330, 331, 332, 332, 712, , 716
ESP10, 326, 329, 330, 331, 331, 715, , 719
ESP10, 326, 329, 330, 331, 331, 717, , 721
ESP10, 326, 329, 330, 331, 331, 719, , 723
ESP10, 326, 328, 330, 330, 331, 722, , 726
ESP10, 327, 328, 330, 330, 331, 724, , 728
ESP10, 327, 328, 329, 330, 331, 726, , 730
ESP10, 325, 328, 329, 329, 330, 729, , 733
ESP10, 326, 328, 329, 329, 330, 731, , 735
ESP10, 326, 328, 329, 329, 330, 733, , 737
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/HHWM8W_SQIN.ESPF10.csv
HHWM8W_SQIN.ESPF0.csv|2026-07-13
HHWM8W_SQIN.ESPF10.csv|2026-07-13
HHWM8W_SQIN.ESPFM.csv|2026-07-13
APR-SEP
SF FLATHEAD - HUNGRY HORSE DAM
(
HHWM8
)
Forecasts for Water Year
2027
Official Water Supply
ESP with 10 Days QPF
Ensemble:
2026-07-13
Issued:
2026-07-13
Hide Forecast
Forecast
Period
Forecasts Are in KAF
30 Year
Average
(1991-2020)
90 %
50 %
%
Average
10 %
APR-SEP
1419
1863
89
2582
2088
APR-JUL
1330
1738
88
2459
1981
APR-AUG
1381
1798
88
2538
2043
JAN-SEP
1602
2158
92
2765
2343
JAN-JUL
1513
1994
89
2640
2236
OCT-SEP
1767
2377
93
3126
2567
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/HHWM8W_SQIN.ESPF10.csv
HHWM8W_SQIN.ESPF0.csv|2026-07-13
HHWM8W_SQIN.ESPF10.csv|2026-07-13
HHWM8W_SQIN.ESPFM.csv|2026-07-13
APR-SEP
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ESP10,ESPM,ESP0
ESP10,ESPM,ESP0
Last Forecast
