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Water Year
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BIG LOST - MACKAY RESERVOIR NEAR MACKAY
(
MACI1
)
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
99
99
73
100
136
APR-JUL
83
83
74
83
113
APR-AUG
92
92
73
92
126
JAN-SEP
126
126
77
127
164
JAN-JUL
110
110
78
110
141
OCT-SEP
155
156
79
156
197
Experimental Water Supply
HEFS with 15 days EQPF
Ensemble:
2026-08-15
Issued:
2026-08-15
Hide Forecast
APR-SEP
99
99
73
100
136
APR-JUL
83
83
74
83
113
APR-AUG
92
92
73
93
126
JAN-SEP
126
126
77
127
164
JAN-JUL
110
110
78
110
141
OCT-SEP
155
156
79
157
197
Reference
ESP with 0 Days QPF
Ensemble:
2026-08-15
Issued:
2026-08-15
Hide Forecast
APR-SEP
99
99
73
100
136
APR-JUL
83
83
74
83
113
APR-AUG
92
92
73
93
126
JAN-SEP
126
126
77
127
164
JAN-JUL
110
110
78
110
141
OCT-SEP
155
156
79
157
197
Move the mouse over the desired "Forecast Period" to display a graph.
ESP10, 269, 361, 434, 464, 498, 70, , 74
ESP10, 250, 344, 418, 447, 482, 72, , 76
ESP10, 250, 343, 416, 445, 482, 74, , 78
ESP10, 250, 343, 417, 446, 483, 76, , 80
ESP10, 252, 344, 418, 446, 483, 78, , 82
ESP10, 247, 340, 412, 442, 478, 81, , 85
ESP10, 243, 337, 408, 438, 474, 83, , 87
ESP10, 250, 340, 413, 446, 478, 85, , 89
ESP10, 247, 337, 414, 443, 475, 87, , 91
ESP10, 239, 330, 406, 436, 469, 89, , 93
ESP10, 234, 325, 400, 431, 463, 91, , 95
ESP10, 242, 332, 409, 439, 472, 93, , 97
ESP10, 236, 328, 403, 434, 465, 95, , 99
ESP10, 242, 329, 406, 438, 469, 97, , 101
ESP10, 239, 325, 402, 441, 464, 99, , 103
ESP10, 230, 315, 392, 432, 457, 102, , 106
ESP10, 228, 313, 390, 430, 455, 104, , 108
ESP10, 235, 317, 393, 433, 458, 106, , 110
ESP10, 228, 312, 387, 426, 453, 108, , 112
ESP10, 236, 312, 388, 427, 453, 110, , 114
ESP10, 239, 315, 389, 428, 454, 112, , 116
ESP10, 247, 322, 397, 438, 462, 114, , 118
ESP10, 246, 323, 396, 437, 461, 116, , 120
ESP10, 247, 326, 399, 437, 462, 118, , 122
ESP10, 247, 326, 399, 438, 463, 120, , 124
ESP10, 247, 329, 400, 439, 465, 122, , 126
ESP10, 247, 330, 399, 441, 468, 125, , 129
ESP10, 247, 334, 401, 441, 469, 127, , 131
ESP10, 244, 332, 402, 439, 466, 129, , 133
ESP10, 237, 325, 395, 435, 461, 131, , 135
ESP10, 234, 323, 392, 433, 460, 133, , 137
ESP10, 238, 330, 397, 441, 464, 135, , 139
ESP10, 237, 333, 397, 441, 467, 137, , 141
ESP10, 238, 333, 402, 442, 467, 139, , 143
ESP10, 240, 333, 401, 442, 467, 141, , 145
ESP10, 248, 333, 402, 443, 468, 143, , 147
ESP10, 245, 329, 399, 442, 466, 145, , 149
ESP10, 235, 318, 389, 432, 462, 148, , 152
ESP10, 245, 320, 390, 434, 464, 150, , 154
ESP10, 258, 322, 392, 436, 465, 152, , 156
ESP10, 267, 328, 398, 441, 472, 154, , 158
ESP10, 271, 332, 397, 440, 471, 156, , 160
ESP10, 273, 331, 397, 440, 469, 158, , 162
ESP10, 275, 330, 396, 438, 467, 160, , 164
ESP10, 279, 332, 398, 439, 468, 162, , 166
ESP10, 281, 333, 399, 440, 470, 164, , 168
ESP10, 283, 337, 405, 442, 473, 166, , 170
ESP10, 284, 338, 407, 442, 473, 169, , 173
ESP10, 283, 334, 404, 440, 472, 171, , 175
ESP10, 277, 329, 398, 436, 468, 173, , 177
ESP10, 277, 328, 397, 435, 472, 175, , 179
ESP10, 277, 329, 396, 435, 473, 177, , 181
ESP10, 282, 332, 401, 443, 479, 179, , 183
ESP10, 283, 334, 401, 444, 479, 181, , 185
ESP10, 286, 336, 403, 444, 480, 183, , 187
ESP10, 288, 336, 402, 446, 479, 185, , 189
ESP10, 286, 334, 400, 447, 477, 187, , 191
ESP10, 289, 335, 404, 447, 478, 189, , 193
ESP10, 292, 340, 405, 449, 479, 192, , 196
ESP10, 284, 334, 397, 445, 473, 194, , 198
ESP10, 284, 335, 397, 445, 475, 196, , 200
ESP10, 286, 340, 402, 447, 477, 198, , 202
ESP10, 287, 341, 404, 447, 478, 200, , 204
ESP10, 277, 331, 397, 443, 472, 202, , 206
ESP10, 276, 329, 393, 442, 471, 204, , 208
ESP10, 277, 327, 391, 440, 469, 206, , 210
ESP10, 274, 324, 391, 438, 468, 208, , 212
ESP10, 288, 338, 403, 451, 480, 210, , 214
ESP10, 288, 338, 405, 451, 480, 212, , 216
ESP10, 290, 329, 399, 444, 471, 215, , 219
ESP10, 289, 323, 391, 435, 464, 217, , 221
ESP10, 282, 314, 380, 429, 455, 219, , 223
ESP10, 270, 304, 370, 419, 448, 221, , 225
ESP10, 266, 300, 366, 416, 444, 223, , 227
ESP10, 267, 300, 366, 419, 446, 225, , 229
ESP10, 259, 292, 357, 410, 442, 227, , 231
ESP10, 255, 291, 353, 406, 442, 229, , 233
ESP10, 257, 297, 357, 406, 442, 231, , 235
ESP10, 252, 293, 353, 402, 438, 233, , 237
ESP10, 252, 299, 352, 401, 437, 236, , 240
ESP10, 242, 293, 346, 393, 430, 238, , 242
ESP10, 238, 293, 342, 391, 425, 240, , 244
ESP10, 235, 293, 337, 386, 421, 242, , 246
ESP10, 229, 284, 329, 379, 416, 244, , 248
ESP10, 230, 279, 326, 377, 412, 246, , 250
ESP10, 243, 290, 334, 383, 422, 248, , 252
ESP10, 244, 288, 332, 381, 421, 250, , 254
ESP10, 254, 298, 339, 387, 427, 252, , 256
ESP10, 250, 294, 336, 384, 424, 254, , 258
ESP10, 248, 294, 337, 384, 422, 256, , 260
ESP10, 222, 273, 317, 366, 406, 259, , 263
ESP10, 221, 271, 318, 363, 403, 261, , 265
ESP10, 223, 272, 319, 364, 404, 263, , 267
ESP10, 221, 271, 316, 363, 403, 265, , 269
ESP10, 220, 271, 316, 363, 403, 267, , 271
ESP10, 216, 268, 312, 360, 399, 269, , 273
ESP10, 214, 270, 310, 360, 398, 271, , 275
ESP10, 218, 272, 309, 360, 397, 273, , 277
ESP10, 220, 274, 310, 362, 398, 275, , 279
ESP10, 221, 274, 312, 362, 398, 277, , 281
ESP10, 223, 276, 315, 362, 399, 279, , 283
ESP10, 225, 280, 321, 362, 399, 282, , 286
ESP10, 227, 280, 325, 365, 399, 284, , 288
ESP10, 230, 280, 325, 365, 399, 286, , 290
ESP10, 233, 281, 326, 366, 402, 288, , 292
ESP10, 233, 281, 327, 365, 402, 290, , 294
ESP10, 232, 280, 327, 365, 401, 292, , 296
ESP10, 235, 281, 328, 367, 405, 294, , 298
ESP10, 235, 282, 331, 368, 411, 296, , 300
ESP10, 236, 282, 333, 368, 413, 298, , 302
ESP10, 237, 284, 333, 369, 413, 300, , 304
ESP10, 237, 284, 333, 369, 413, 303, , 307
ESP10, 238, 284, 335, 369, 414, 305, , 309
ESP10, 240, 284, 336, 370, 414, 307, , 311
ESP10, 243, 292, 336, 371, 414, 309, , 313
ESP10, 246, 295, 336, 371, 414, 311, , 315
ESP10, 248, 295, 336, 372, 414, 313, , 317
ESP10, 248, 295, 337, 373, 414, 315, , 319
ESP10, 249, 295, 337, 378, 414, 317, , 321
ESP10, 249, 295, 337, 381, 414, 319, , 323
ESP10, 250, 295, 339, 382, 414, 321, , 325
ESP10, 250, 297, 342, 381, 414, 323, , 327
ESP10, 249, 296, 341, 381, 416, 326, , 330
ESP10, 244, 291, 336, 375, 412, 328, , 332
ESP10, 243, 286, 336, 374, 408, 330, , 334
ESP10, 252, 294, 345, 380, 413, 332, , 336
ESP10, 259, 298, 354, 385, 417, 334, , 338
ESP10, 260, 293, 349, 381, 414, 336, , 340
ESP10, 260, 292, 348, 381, 413, 338, , 342
ESP10, 257, 293, 344, 379, 409, 340, , 344
ESP10, 243, 279, 339, 368, 400, 342, , 346
ESP10, 242, 277, 338, 366, 401, 344, , 348
ESP10, 254, 286, 345, 374, 410, 346, , 350
ESP10, 258, 295, 350, 377, 413, 349, , 353
ESP10, 262, 298, 353, 380, 417, 351, , 355
ESP10, 262, 299, 353, 382, 418, 353, , 357
ESP10, 248, 288, 342, 372, 408, 355, , 359
ESP10, 253, 286, 339, 368, 404, 357, , 361
ESP10, 245, 279, 332, 362, 398, 359, , 363
ESP10, 259, 295, 346, 373, 408, 361, , 365
ESP10, 261, 296, 347, 376, 409, 363, , 367
ESP10, 263, 306, 345, 374, 407, 365, , 369
ESP10, 273, 317, 352, 382, 414, 367, , 371
ESP10, 275, 320, 353, 384, 415, 370, , 374
ESP10, 278, 322, 354, 385, 416, 372, , 376
ESP10, 277, 320, 354, 383, 417, 374, , 378
ESP10, 266, 312, 349, 376, 409, 376, , 380
ESP10, 266, 309, 347, 376, 406, 378, , 382
ESP10, 277, 320, 355, 385, 415, 380, , 384
ESP10, 276, 320, 356, 385, 416, 382, , 386
ESP10, 276, 320, 356, 385, 416, 384, , 388
ESP10, 276, 321, 357, 386, 416, 386, , 390
ESP10, 275, 322, 360, 386, 414, 388, , 392
ESP10, 278, 322, 361, 387, 414, 390, , 394
ESP10, 289, 323, 359, 386, 413, 393, , 397
ESP10, 298, 330, 367, 395, 421, 395, , 399
ESP10, 300, 333, 368, 396, 423, 397, , 401
ESP10, 297, 332, 367, 394, 420, 399, , 403
ESP10, 299, 334, 369, 395, 421, 401, , 405
ESP10, 301, 335, 371, 397, 425, 403, , 407
ESP10, 309, 335, 372, 397, 424, 405, , 409
ESP10, 311, 332, 370, 396, 422, 407, , 411
ESP10, 318, 336, 372, 399, 424, 409, , 413
ESP10, 318, 336, 373, 397, 423, 411, , 415
ESP10, 323, 341, 379, 399, 425, 413, , 417
ESP10, 323, 349, 379, 402, 425, 416, , 420
ESP10, 320, 347, 376, 401, 424, 418, , 422
ESP10, 324, 351, 378, 404, 425, 420, , 424
ESP10, 327, 356, 383, 405, 430, 422, , 426
ESP10, 327, 358, 383, 405, 433, 424, , 428
ESP10, 330, 360, 385, 408, 433, 426, , 430
ESP10, 330, 362, 385, 410, 433, 428, , 432
ESP10, 329, 361, 382, 408, 430, 430, , 434
ESP10, 319, 353, 374, 399, 421, 432, , 436
ESP10, 300, 338, 360, 383, 409, 434, , 438
ESP10, 308, 347, 371, 389, 415, 437, , 441
ESP10, 305, 346, 369, 388, 414, 439, , 443
ESP10, 305, 344, 368, 387, 413, 441, , 445
ESP10, 324, 361, 381, 406, 427, 443, , 447
ESP10, 339, 371, 393, 415, 438, 445, , 449
ESP10, 337, 370, 393, 415, 437, 447, , 451
ESP10, 341, 371, 396, 417, 439, 449, , 453
ESP10, 338, 370, 391, 415, 436, 451, , 455
ESP10, 345, 376, 396, 421, 443, 453, , 457
ESP10, 345, 373, 394, 419, 441, 455, , 459
ESP10, 345, 373, 395, 420, 440, 457, , 461
ESP10, 345, 373, 395, 419, 439, 460, , 464
ESP10, 346, 376, 396, 422, 441, 462, , 466
ESP10, 338, 369, 392, 417, 433, 464, , 468
ESP10, 341, 372, 395, 422, 436, 466, , 470
ESP10, 341, 371, 398, 422, 436, 468, , 472
ESP10, 325, 364, 379, 404, 422, 470, , 474
ESP10, 321, 362, 378, 403, 419, 472, , 476
ESP10, 331, 370, 387, 412, 428, 474, , 478
ESP10, 318, 358, 377, 399, 416, 476, , 480
ESP10, 321, 360, 381, 402, 417, 478, , 482
ESP10, 321, 359, 383, 401, 416, 480, , 484
ESP10, 338, 383, 406, 426, 440, 483, , 487
ESP10, 336, 381, 403, 423, 436, 485, , 489
ESP10, 335, 381, 403, 423, 436, 487, , 491
ESP10, 332, 378, 399, 421, 432, 489, , 493
ESP10, 334, 377, 397, 419, 431, 491, , 495
ESP10, 336, 384, 401, 423, 433, 493, , 497
ESP10, 358, 406, 424, 444, 452, 495, , 499
ESP10, 364, 412, 430, 450, 458, 497, , 501
ESP10, 365, 412, 429, 449, 460, 499, , 503
ESP10, 364, 410, 427, 447, 460, 501, , 505
ESP10, 360, 406, 425, 444, 456, 504, , 508
ESP10, 367, 411, 431, 450, 461, 506, , 510
ESP10, 375, 418, 435, 454, 465, 508, , 512
ESP10, 378, 418, 438, 454, 467, 510, , 514
ESP10, 389, 421, 448, 458, 470, 512, , 516
ESP10, 388, 422, 446, 457, 467, 514, , 518
ESP10, 393, 424, 450, 457, 467, 516, , 520
ESP10, 397, 424, 450, 460, 468, 518, , 522
ESP10, 403, 425, 451, 461, 467, 520, , 524
ESP10, 409, 425, 451, 461, 470, 522, , 526
ESP10, 414, 425, 452, 459, 469, 524, , 528
ESP10, 416, 432, 449, 460, 468, 527, , 531
ESP10, 415, 433, 451, 462, 466, 529, , 533
ESP10, 421, 437, 454, 465, 471, 531, , 535
ESP10, 417, 432, 452, 462, 466, 533, , 537
ESP10, 425, 440, 463, 471, 478, 535, , 539
ESP10, 424, 439, 458, 465, 470, 537, , 541
ESP10, 429, 445, 465, 472, 475, 539, , 543
ESP10, 428, 444, 462, 466, 472, 541, , 545
ESP10, 430, 448, 464, 469, 470, 543, , 547
ESP10, 435, 451, 466, 472, 473, 545, , 549
ESP10, 437, 452, 468, 473, 474, 547, , 551
ESP10, 437, 452, 469, 473, 474, 550, , 554
ESP10, 440, 458, 471, 477, 477, 552, , 556
ESP10, 441, 463, 473, 476, 477, 554, , 558
ESP10, 442, 466, 473, 477, 478, 556, , 560
ESP10, 437, 462, 470, 476, 477, 558, , 562
ESP10, 440, 462, 473, 476, 477, 560, , 564
ESP10, 442, 463, 472, 476, 477, 562, , 566
ESP10, 452, 466, 469, 469, 470, 564, , 568
ESP10, 454, 461, 463, 463, 464, 566, , 570
ESP10, 454, 458, 459, 459, 460, 568, , 572
ESP10, 456, 457, 459, 459, 460, 571, , 575
ESP10, 449, 455, 456, 457, 457, 573, , 577
ESP10, 452, 454, 455, 455, 456, 575, , 579
ESP10, 446, 447, 448, 449, 449, 577, , 581
ESP10, 453, 455, 456, 456, 457, 579, , 583
ESP10, 453, 456, 456, 457, 457, 581, , 585
ESP10, 452, 455, 455, 456, 456, 583, , 587
ESP10, 451, 455, 456, 456, 456, 585, , 589
ESP10, 446, 448, 449, 449, 450, 587, , 591
ESP10, 447, 448, 449, 449, 450, 589, , 593
ESP10, 448, 448, 449, 449, 450, 591, , 595
ESP10, 448, 449, 449, 450, 450, 594, , 598
ESP10, 448, 449, 449, 450, 450, 596, , 600
ESP10, 450, 450, 451, 451, 452, 598, , 602
ESP10, 450, 450, 451, 451, 452, 600, , 604
ESP10, 451, 451, 452, 452, 453, 602, , 606
ESP10, 450, 451, 451, 452, 452, 604, , 608
ESP10, 449, 450, 451, 451, 452, 606, , 610
ESP10, 445, 445, 446, 446, 447, 608, , 612
ESP10, 440, 441, 442, 442, 442, 610, , 614
ESP10, 442, 442, 443, 443, 444, 612, , 616
ESP10, 443, 444, 444, 445, 445, 614, , 618
ESP10, 442, 443, 443, 443, 444, 617, , 621
ESP10, 442, 442, 443, 443, 444, 619, , 623
ESP10, 442, 443, 444, 444, 444, 621, , 625
ESP10, 445, 446, 446, 446, 447, 623, , 627
ESP10, 445, 446, 446, 446, 447, 625, , 629
ESP10, 445, 445, 446, 446, 447, 627, , 631
ESP10, 445, 446, 446, 446, 447, 629, , 633
ESP10, 445, 446, 446, 447, 447, 631, , 635
ESP10, 445, 446, 446, 447, 447, 633, , 637
ESP10, 445, 446, 447, 447, 447, 635, , 639
ESP10, 445, 446, 446, 446, 447, 638, , 642
ESP10, 445, 446, 446, 446, 447, 640, , 644
ESP10, 445, 446, 446, 446, 447, 642, , 646
ESP10, 445, 446, 446, 447, 447, 644, , 648
ESP10, 445, 446, 447, 447, 447, 646, , 650
ESP10, 446, 447, 447, 448, 448, 648, , 652
ESP10, 446, 447, 448, 448, 448, 650, , 654
ESP10, 447, 447, 448, 448, 448, 652, , 656
ESP10, 447, 448, 448, 448, 449, 654, , 658
ESP10, 448, 448, 449, 449, 450, 656, , 660
ESP10, 448, 449, 449, 449, 450, 658, , 662
ESP10, 448, 449, 449, 449, 450, 661, , 665
ESP10, 449, 450, 451, 451, 451, 663, , 667
ESP10, 450, 450, 451, 451, 452, 665, , 669
ESP10, 450, 451, 451, 452, 452, 667, , 671
ESP10, 447, 448, 448, 448, 449, 669, , 673
ESP10, 450, 451, 451, 452, 452, 671, , 675
ESP10, 451, 452, 452, 452, 453, 673, , 677
ESP10, 451, 451, 452, 452, 453, 675, , 679
ESP10, 451, 451, 452, 452, 453, 677, , 681
ESP10, 451, 452, 452, 452, 453, 679, , 683
ESP10, 452, 452, 452, 453, 453, 681, , 685
ESP10, 451, 452, 452, 453, 453, 684, , 688
ESP10, 452, 452, 452, 453, 453, 686, , 690
ESP10, 452, 452, 453, 453, 453, 688, , 692
ESP10, 452, 452, 453, 453, 453, 690, , 694
ESP10, 453, 453, 454, 454, 454, 692, , 696
ESP10, 453, 453, 454, 454, 454, 694, , 698
ESP10, 453, 453, 454, 454, 454, 696, , 700
ESP10, 453, 453, 454, 454, 454, 698, , 702
ESP10, 453, 453, 454, 454, 454, 700, , 704
ESP10, 453, 453, 454, 454, 454, 702, , 706
ESP10, 452, 453, 453, 453, 453, 705, , 709
ESP10, 452, 453, 453, 453, 454, 707, , 711
ESP10, 453, 453, 454, 454, 454, 709, , 713
ESP10, 453, 453, 454, 454, 454, 711, , 715
ESP10, 453, 454, 454, 454, 454, 713, , 717
ESP10, 453, 453, 454, 454, 454, 715, , 719
ESP10, 453, 453, 454, 454, 454, 717, , 721
ESP10, 453, 453, 454, 454, 454, 719, , 723
ESP10, 453, 453, 454, 454, 454, 721, , 725
ESP10, 452, 453, 453, 453, 453, 723, , 727
ESP10, 452, 453, 453, 453, 453, 725, , 729
ESP10, 452, 453, 453, 453, 454, 728, , 732
ESP10, 455, 456, 456, 456, 456, 730, , 734
ESP10, 456, 456, 456, 456, 457, 732, , 736
ESP10, 455, 456, 456, 456, 456, 734, , 738
Max Scale
Scale To Data
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Show Min/Max Ensemble Volume
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ESP10
HEFS
ESP0
Data Files
/chpsesp/ensemble/watersupply/MACI1W_SQIN.ESPF10.csv
MACI1W_SQIN.ESPF0.csv|2026-08-15
MACI1W_SQIN.ESPF10.csv|2026-08-15
MACI1W_SQIN.ESPFM.csv|2026-08-15
APR-SEP
BIG LOST - MACKAY RESERVOIR NEAR MACKAY
(
MACI1
)
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
65
131
96
289
136
APR-JUL
54
109
96
246
113
APR-AUG
59
122
97
273
126
JAN-SEP
82
148
90
306
164
JAN-JUL
71
126
89
263
141
OCT-SEP
102
168
85
326
197
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/MACI1W_SQIN.ESPF10.csv
MACI1W_SQIN.ESPF0.csv|2026-08-15
MACI1W_SQIN.ESPF10.csv|2026-08-15
MACI1W_SQIN.ESPFM.csv|2026-08-15
APR-SEP
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ESP10,ESPM,ESP0
ESP10,ESPM,ESP0
Last Forecast
