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Water Year
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KOOTENAI - LIBBY DAM
(
LYDM8
)
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
6745
6775
105
6875
6429
APR-JUL
6113
6113
110
6113
5570
APR-AUG
6512
6513
107
6516
6080
JAN-SEP
7854
7884
111
7984
7086
JAN-JUL
7222
7222
116
7222
6227
OCT-SEP
8802
8832
111
8932
7981
Experimental Water Supply
HEFS with 15 days EQPF
Ensemble:
2026-08-15
Issued:
2026-08-15
Hide Forecast
APR-SEP
6747
6773
105
6889
6429
APR-JUL
6113
6113
110
6113
5570
APR-AUG
6512
6513
107
6519
6080
JAN-SEP
7855
7882
111
7998
7086
JAN-JUL
7222
7222
116
7222
6227
OCT-SEP
8804
8830
111
8946
7981
Reference
ESP with 0 Days QPF
Ensemble:
2026-08-15
Issued:
2026-08-15
Hide Forecast
APR-SEP
6751
6798
106
6934
6429
APR-JUL
6113
6113
110
6113
5570
APR-AUG
6513
6516
107
6532
6080
JAN-SEP
7860
7907
112
8043
7086
JAN-JUL
7222
7222
116
7222
6227
OCT-SEP
8808
8855
111
8991
7981
Move the mouse over the desired "Forecast Period" to display a graph.
ESP10, 265, 310, 383, 419, 458, 70, , 74
ESP10, 263, 308, 380, 415, 456, 72, , 76
ESP10, 265, 313, 382, 416, 460, 74, , 78
ESP10, 263, 316, 378, 414, 457, 76, , 80
ESP10, 264, 317, 378, 415, 455, 78, , 82
ESP10, 259, 313, 380, 412, 456, 81, , 85
ESP10, 265, 319, 384, 416, 462, 83, , 87
ESP10, 264, 315, 380, 417, 459, 85, , 89
ESP10, 266, 318, 382, 418, 462, 87, , 91
ESP10, 268, 317, 383, 417, 463, 89, , 93
ESP10, 271, 319, 387, 418, 464, 91, , 95
ESP10, 267, 316, 386, 416, 461, 93, , 97
ESP10, 267, 316, 386, 421, 462, 95, , 99
ESP10, 269, 318, 391, 425, 465, 97, , 101
ESP10, 268, 315, 389, 423, 466, 99, , 103
ESP10, 261, 311, 382, 418, 461, 102, , 106
ESP10, 250, 304, 370, 407, 451, 104, , 108
ESP10, 262, 315, 383, 418, 461, 106, , 110
ESP10, 266, 317, 387, 420, 463, 108, , 112
ESP10, 269, 318, 387, 419, 465, 110, , 114
ESP10, 263, 315, 382, 412, 459, 112, , 116
ESP10, 263, 316, 382, 415, 465, 114, , 118
ESP10, 255, 313, 373, 409, 463, 116, , 120
ESP10, 261, 323, 381, 418, 467, 118, , 122
ESP10, 263, 325, 383, 425, 468, 120, , 124
ESP10, 259, 328, 381, 422, 467, 122, , 126
ESP10, 261, 332, 380, 421, 467, 125, , 129
ESP10, 265, 329, 378, 420, 466, 127, , 131
ESP10, 265, 322, 372, 414, 461, 129, , 133
ESP10, 254, 310, 363, 405, 455, 131, , 135
ESP10, 256, 311, 366, 408, 459, 133, , 137
ESP10, 256, 315, 367, 415, 462, 135, , 139
ESP10, 251, 310, 361, 411, 459, 137, , 141
ESP10, 261, 318, 367, 416, 463, 139, , 143
ESP10, 265, 319, 365, 414, 462, 141, , 145
ESP10, 267, 321, 366, 413, 462, 143, , 147
ESP10, 270, 322, 368, 413, 463, 145, , 149
ESP10, 265, 313, 361, 414, 457, 148, , 152
ESP10, 271, 321, 367, 419, 462, 150, , 154
ESP10, 273, 326, 367, 420, 462, 152, , 156
ESP10, 276, 323, 365, 418, 461, 154, , 158
ESP10, 278, 318, 363, 413, 457, 156, , 160
ESP10, 286, 324, 370, 419, 462, 158, , 162
ESP10, 283, 326, 366, 415, 459, 160, , 164
ESP10, 277, 315, 353, 406, 450, 162, , 166
ESP10, 285, 319, 356, 411, 453, 164, , 168
ESP10, 275, 308, 345, 402, 445, 166, , 170
ESP10, 279, 311, 352, 408, 452, 169, , 173
ESP10, 277, 310, 350, 407, 451, 171, , 175
ESP10, 282, 311, 351, 406, 453, 173, , 177
ESP10, 289, 316, 352, 409, 453, 175, , 179
ESP10, 288, 316, 350, 408, 451, 177, , 181
ESP10, 288, 314, 345, 412, 446, 179, , 183
ESP10, 298, 323, 353, 421, 451, 181, , 185
ESP10, 298, 326, 353, 420, 450, 183, , 187
ESP10, 295, 324, 350, 420, 447, 185, , 189
ESP10, 295, 322, 349, 420, 447, 187, , 191
ESP10, 298, 324, 350, 422, 449, 189, , 193
ESP10, 296, 324, 355, 421, 448, 192, , 196
ESP10, 289, 319, 350, 418, 442, 194, , 198
ESP10, 289, 314, 346, 413, 438, 196, , 200
ESP10, 293, 317, 347, 418, 443, 198, , 202
ESP10, 292, 313, 342, 414, 439, 200, , 204
ESP10, 276, 297, 326, 399, 429, 202, , 206
ESP10, 276, 299, 327, 399, 431, 204, , 208
ESP10, 272, 294, 321, 393, 428, 206, , 210
ESP10, 275, 300, 325, 398, 432, 208, , 212
ESP10, 269, 295, 318, 392, 427, 210, , 214
ESP10, 240, 267, 286, 363, 405, 212, , 216
ESP10, 230, 261, 279, 352, 397, 215, , 219
ESP10, 228, 259, 276, 347, 394, 217, , 221
ESP10, 236, 267, 289, 358, 402, 219, , 223
ESP10, 241, 270, 293, 363, 406, 221, , 225
ESP10, 231, 263, 285, 352, 400, 223, , 227
ESP10, 229, 259, 284, 350, 398, 225, , 229
ESP10, 222, 253, 281, 344, 394, 227, , 231
ESP10, 223, 256, 283, 347, 397, 229, , 233
ESP10, 222, 254, 283, 347, 395, 231, , 235
ESP10, 214, 248, 276, 340, 387, 233, , 237
ESP10, 205, 244, 268, 331, 378, 236, , 240
ESP10, 215, 254, 278, 338, 385, 238, , 242
ESP10, 212, 253, 277, 335, 382, 240, , 244
ESP10, 221, 265, 283, 340, 386, 242, , 246
ESP10, 230, 266, 286, 344, 387, 244, , 248
ESP10, 225, 256, 277, 337, 382, 246, , 250
ESP10, 224, 255, 278, 336, 382, 248, , 252
ESP10, 226, 255, 280, 337, 383, 250, , 254
ESP10, 227, 255, 282, 337, 386, 252, , 256
ESP10, 225, 252, 281, 333, 384, 254, , 258
ESP10, 232, 254, 285, 333, 385, 256, , 260
ESP10, 236, 257, 287, 331, 382, 259, , 263
ESP10, 234, 256, 285, 328, 379, 261, , 265
ESP10, 229, 252, 280, 324, 376, 263, , 267
ESP10, 231, 255, 285, 327, 378, 265, , 269
ESP10, 227, 252, 283, 323, 374, 267, , 271
ESP10, 230, 253, 284, 324, 376, 269, , 273
ESP10, 232, 256, 288, 326, 377, 271, , 275
ESP10, 234, 258, 293, 331, 378, 273, , 277
ESP10, 230, 253, 292, 326, 373, 275, , 279
ESP10, 227, 250, 289, 323, 370, 277, , 281
ESP10, 224, 248, 287, 322, 368, 279, , 283
ESP10, 221, 248, 286, 321, 366, 282, , 286
ESP10, 218, 246, 285, 320, 363, 284, , 288
ESP10, 211, 243, 278, 316, 356, 286, , 290
ESP10, 213, 242, 278, 318, 355, 288, , 292
ESP10, 212, 242, 278, 317, 353, 290, , 294
ESP10, 218, 244, 278, 318, 354, 292, , 296
ESP10, 220, 245, 279, 319, 354, 294, , 298
ESP10, 226, 246, 279, 325, 352, 296, , 300
ESP10, 234, 255, 284, 333, 356, 298, , 302
ESP10, 234, 255, 287, 334, 357, 300, , 304
ESP10, 237, 256, 289, 335, 358, 303, , 307
ESP10, 237, 255, 290, 335, 358, 305, , 309
ESP10, 237, 256, 291, 336, 358, 307, , 311
ESP10, 236, 256, 293, 334, 357, 309, , 313
ESP10, 234, 256, 293, 332, 355, 311, , 315
ESP10, 235, 259, 297, 333, 356, 313, , 317
ESP10, 232, 256, 294, 329, 353, 315, , 319
ESP10, 235, 257, 294, 333, 360, 317, , 321
ESP10, 236, 258, 294, 333, 364, 319, , 323
ESP10, 238, 257, 293, 332, 364, 321, , 325
ESP10, 235, 252, 289, 327, 361, 323, , 327
ESP10, 227, 245, 282, 320, 354, 326, , 330
ESP10, 229, 250, 284, 323, 358, 328, , 332
ESP10, 231, 252, 286, 323, 358, 330, , 334
ESP10, 232, 252, 295, 324, 357, 332, , 336
ESP10, 230, 252, 290, 321, 353, 334, , 338
ESP10, 238, 257, 296, 326, 356, 336, , 340
ESP10, 236, 252, 290, 320, 349, 338, , 342
ESP10, 241, 255, 292, 323, 351, 340, , 344
ESP10, 244, 260, 294, 328, 354, 342, , 346
ESP10, 251, 264, 295, 333, 357, 344, , 348
ESP10, 249, 262, 294, 330, 354, 346, , 350
ESP10, 251, 265, 297, 332, 356, 349, , 353
ESP10, 247, 264, 296, 329, 353, 351, , 355
ESP10, 236, 254, 286, 318, 345, 353, , 357
ESP10, 238, 255, 290, 319, 345, 355, , 359
ESP10, 240, 258, 294, 321, 347, 357, , 361
ESP10, 228, 249, 284, 311, 337, 359, , 363
ESP10, 232, 254, 290, 315, 342, 361, , 365
ESP10, 222, 245, 282, 309, 333, 363, , 367
ESP10, 227, 249, 285, 315, 336, 365, , 369
ESP10, 219, 243, 286, 309, 331, 367, , 371
ESP10, 225, 250, 290, 314, 336, 370, , 374
ESP10, 228, 250, 291, 316, 337, 372, , 376
ESP10, 241, 260, 302, 327, 346, 374, , 378
ESP10, 237, 259, 304, 326, 343, 376, , 380
ESP10, 235, 257, 302, 324, 340, 378, , 382
ESP10, 237, 262, 303, 324, 339, 380, , 384
ESP10, 228, 259, 296, 317, 336, 382, , 386
ESP10, 229, 263, 296, 317, 337, 384, , 388
ESP10, 222, 259, 291, 311, 331, 386, , 390
ESP10, 214, 249, 280, 301, 322, 388, , 392
ESP10, 214, 249, 282, 302, 324, 390, , 394
ESP10, 212, 246, 275, 302, 320, 393, , 397
ESP10, 213, 247, 273, 302, 322, 395, , 399
ESP10, 208, 239, 266, 294, 313, 397, , 401
ESP10, 218, 249, 280, 304, 323, 399, , 403
ESP10, 201, 233, 263, 288, 308, 401, , 405
ESP10, 212, 247, 273, 298, 320, 403, , 407
ESP10, 219, 253, 279, 304, 324, 405, , 409
ESP10, 212, 246, 271, 301, 318, 407, , 411
ESP10, 209, 241, 266, 295, 311, 409, , 413
ESP10, 212, 246, 268, 296, 312, 411, , 415
ESP10, 204, 239, 261, 288, 304, 413, , 417
ESP10, 202, 236, 260, 285, 301, 416, , 420
ESP10, 198, 229, 252, 277, 294, 418, , 422
ESP10, 192, 224, 246, 273, 288, 420, , 424
ESP10, 184, 221, 240, 267, 284, 422, , 426
ESP10, 183, 221, 242, 267, 284, 424, , 428
ESP10, 179, 221, 243, 266, 283, 426, , 430
ESP10, 176, 219, 241, 262, 281, 428, , 432
ESP10, 176, 221, 245, 264, 282, 430, , 434
ESP10, 172, 216, 242, 263, 279, 432, , 436
ESP10, 168, 212, 238, 259, 276, 434, , 438
ESP10, 170, 211, 239, 262, 275, 437, , 441
ESP10, 171, 214, 236, 260, 274, 439, , 443
ESP10, 179, 218, 242, 265, 277, 441, , 445
ESP10, 188, 222, 249, 271, 282, 443, , 447
ESP10, 201, 234, 262, 283, 293, 445, , 449
ESP10, 205, 239, 266, 286, 296, 447, , 451
ESP10, 202, 236, 263, 282, 295, 449, , 453
ESP10, 200, 234, 260, 282, 294, 451, , 455
ESP10, 207, 242, 267, 289, 302, 453, , 457
ESP10, 205, 244, 268, 289, 305, 455, , 459
ESP10, 201, 240, 264, 287, 302, 457, , 461
ESP10, 201, 237, 261, 284, 299, 460, , 464
ESP10, 212, 252, 273, 294, 312, 462, , 466
ESP10, 214, 255, 275, 294, 314, 464, , 468
ESP10, 211, 251, 272, 292, 310, 466, , 470
ESP10, 209, 248, 272, 290, 307, 468, , 472
ESP10, 207, 246, 271, 289, 305, 470, , 474
ESP10, 209, 249, 276, 293, 310, 472, , 476
ESP10, 212, 249, 277, 293, 308, 474, , 478
ESP10, 205, 245, 269, 285, 300, 476, , 480
ESP10, 216, 256, 280, 296, 310, 478, , 482
ESP10, 222, 260, 284, 303, 314, 480, , 484
ESP10, 218, 256, 281, 299, 311, 483, , 487
ESP10, 208, 247, 271, 292, 301, 485, , 489
ESP10, 210, 250, 276, 296, 304, 487, , 491
ESP10, 213, 254, 278, 299, 309, 489, , 493
ESP10, 212, 249, 274, 295, 304, 491, , 495
ESP10, 212, 250, 274, 295, 305, 493, , 497
ESP10, 220, 261, 283, 305, 313, 495, , 499
ESP10, 217, 261, 281, 302, 311, 497, , 501
ESP10, 219, 265, 282, 303, 313, 499, , 503
ESP10, 219, 265, 284, 303, 313, 501, , 505
ESP10, 205, 250, 269, 289, 299, 504, , 508
ESP10, 216, 262, 279, 300, 309, 506, , 510
ESP10, 213, 261, 278, 296, 306, 508, , 512
ESP10, 215, 263, 280, 299, 311, 510, , 514
ESP10, 220, 268, 284, 304, 315, 512, , 516
ESP10, 221, 270, 289, 307, 316, 514, , 518
ESP10, 221, 271, 288, 307, 316, 516, , 520
ESP10, 219, 270, 287, 307, 315, 518, , 522
ESP10, 215, 263, 282, 300, 309, 520, , 524
ESP10, 223, 267, 288, 304, 312, 522, , 526
ESP10, 225, 267, 287, 306, 312, 524, , 528
ESP10, 227, 267, 288, 306, 314, 527, , 531
ESP10, 227, 265, 286, 304, 312, 529, , 533
ESP10, 231, 266, 288, 307, 311, 531, , 535
ESP10, 227, 268, 284, 302, 307, 533, , 537
ESP10, 225, 267, 286, 299, 305, 535, , 539
ESP10, 223, 265, 283, 295, 302, 537, , 541
ESP10, 223, 262, 282, 294, 301, 539, , 543
ESP10, 229, 265, 282, 295, 303, 541, , 545
ESP10, 228, 265, 285, 297, 302, 543, , 547
ESP10, 226, 266, 283, 297, 303, 545, , 549
ESP10, 227, 269, 286, 298, 305, 547, , 551
ESP10, 229, 272, 289, 301, 310, 550, , 554
ESP10, 220, 264, 282, 294, 302, 552, , 556
ESP10, 219, 261, 278, 291, 300, 554, , 558
ESP10, 224, 265, 278, 290, 298, 556, , 560
ESP10, 221, 260, 275, 286, 293, 558, , 562
ESP10, 225, 262, 277, 288, 296, 560, , 564
ESP10, 221, 258, 272, 285, 291, 562, , 566
ESP10, 220, 254, 271, 281, 287, 564, , 568
ESP10, 229, 255, 268, 280, 287, 566, , 570
ESP10, 244, 258, 273, 285, 291, 568, , 572
ESP10, 242, 255, 272, 282, 289, 571, , 575
ESP10, 246, 259, 277, 289, 292, 573, , 577
ESP10, 239, 253, 270, 283, 287, 575, , 579
ESP10, 236, 248, 266, 280, 283, 577, , 581
ESP10, 234, 246, 262, 278, 282, 579, , 583
ESP10, 227, 240, 256, 274, 277, 581, , 585
ESP10, 231, 241, 258, 274, 280, 583, , 587
ESP10, 234, 247, 267, 278, 284, 585, , 589
ESP10, 243, 254, 278, 288, 292, 587, , 591
ESP10, 240, 249, 274, 283, 288, 589, , 593
ESP10, 239, 251, 273, 280, 286, 591, , 595
ESP10, 245, 259, 281, 286, 292, 594, , 598
ESP10, 253, 266, 285, 292, 298, 596, , 600
ESP10, 260, 273, 292, 300, 304, 598, , 602
ESP10, 253, 269, 288, 294, 298, 600, , 604
ESP10, 258, 268, 287, 293, 297, 602, , 606
ESP10, 263, 272, 291, 297, 302, 604, , 608
ESP10, 265, 276, 293, 298, 304, 606, , 610
ESP10, 263, 276, 293, 298, 304, 608, , 612
ESP10, 267, 280, 294, 300, 307, 610, , 614
ESP10, 271, 284, 297, 303, 309, 612, , 616
ESP10, 271, 286, 298, 304, 309, 614, , 618
ESP10, 273, 281, 293, 299, 305, 617, , 621
ESP10, 276, 282, 296, 301, 308, 619, , 623
ESP10, 269, 275, 288, 294, 301, 621, , 625
ESP10, 276, 282, 295, 300, 306, 623, , 627
ESP10, 281, 289, 301, 306, 310, 625, , 629
ESP10, 282, 292, 302, 307, 312, 627, , 631
ESP10, 276, 284, 296, 299, 304, 629, , 633
ESP10, 285, 291, 300, 303, 308, 631, , 635
ESP10, 286, 294, 300, 303, 307, 633, , 637
ESP10, 286, 293, 299, 302, 306, 635, , 639
ESP10, 294, 300, 306, 309, 312, 638, , 642
ESP10, 291, 296, 302, 305, 308, 640, , 644
ESP10, 291, 296, 300, 303, 307, 642, , 646
ESP10, 292, 296, 300, 303, 306, 644, , 648
ESP10, 292, 296, 300, 303, 306, 646, , 650
ESP10, 291, 295, 299, 302, 305, 648, , 652
ESP10, 291, 295, 299, 302, 305, 650, , 654
ESP10, 291, 295, 299, 302, 305, 652, , 656
ESP10, 291, 295, 299, 302, 305, 654, , 658
ESP10, 291, 295, 299, 302, 305, 656, , 660
ESP10, 291, 295, 299, 302, 305, 658, , 662
ESP10, 290, 295, 298, 302, 304, 661, , 665
ESP10, 291, 295, 298, 302, 304, 663, , 667
ESP10, 290, 294, 298, 301, 303, 665, , 669
ESP10, 291, 295, 298, 302, 304, 667, , 671
ESP10, 291, 295, 299, 301, 304, 669, , 673
ESP10, 291, 296, 299, 302, 305, 671, , 675
ESP10, 291, 296, 300, 302, 305, 673, , 677
ESP10, 292, 296, 300, 303, 305, 675, , 679
ESP10, 292, 297, 300, 303, 305, 677, , 681
ESP10, 291, 296, 300, 303, 305, 679, , 683
ESP10, 292, 296, 300, 303, 305, 681, , 685
ESP10, 292, 296, 301, 303, 305, 684, , 688
ESP10, 292, 297, 301, 304, 305, 686, , 690
ESP10, 292, 297, 301, 304, 305, 688, , 692
ESP10, 292, 297, 301, 304, 305, 690, , 694
ESP10, 292, 297, 302, 304, 305, 692, , 696
ESP10, 292, 298, 302, 304, 305, 694, , 698
ESP10, 293, 298, 302, 304, 305, 696, , 700
ESP10, 293, 298, 302, 304, 305, 698, , 702
ESP10, 294, 298, 302, 305, 305, 700, , 704
ESP10, 294, 299, 302, 305, 306, 702, , 706
ESP10, 295, 299, 303, 305, 306, 705, , 709
ESP10, 296, 301, 304, 306, 307, 707, , 711
ESP10, 297, 301, 305, 307, 307, 709, , 713
ESP10, 296, 301, 304, 306, 307, 711, , 715
ESP10, 297, 302, 305, 307, 308, 713, , 717
ESP10, 296, 302, 304, 306, 307, 715, , 719
ESP10, 299, 304, 307, 308, 309, 717, , 721
ESP10, 299, 304, 307, 308, 309, 719, , 723
ESP10, 298, 303, 306, 307, 308, 721, , 725
ESP10, 298, 303, 307, 308, 308, 723, , 727
ESP10, 298, 303, 306, 307, 308, 725, , 729
ESP10, 299, 304, 307, 308, 309, 728, , 732
ESP10, 301, 304, 307, 308, 309, 730, , 734
ESP10, 301, 304, 307, 308, 309, 732, , 736
ESP10, 301, 304, 307, 308, 309, 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/LYDM8W_SQIN.ESPF10.csv
LYDM8W_SQIN.ESPF0.csv|2026-08-15
LYDM8W_SQIN.ESPF10.csv|2026-08-15
LYDM8W_SQIN.ESPFM.csv|2026-08-15
APR-SEP
KOOTENAI - LIBBY DAM
(
LYDM8
)
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
4470
5966
93
8072
6429
APR-JUL
3723
5000
90
6969
5570
APR-AUG
4146
5516
91
7620
6080
JAN-SEP
4988
6548
92
8681
7086
JAN-JUL
4255
5621
90
7578
6227
OCT-SEP
5616
7443
93
9735
7981
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/LYDM8W_SQIN.ESPF10.csv
LYDM8W_SQIN.ESPF0.csv|2026-08-15
LYDM8W_SQIN.ESPF10.csv|2026-08-15
LYDM8W_SQIN.ESPFM.csv|2026-08-15
APR-SEP
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ESP10,ESPM,ESP0
ESP10,ESPM,ESP0
Last Forecast
