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COLUMBIA - ARROW LAKES (HUGH KEENLEYSIDE DAM)
(
ARDQ2
)
Forecasts for Water Year
2026
Official Water Supply
ESP with 10 Days QPF
Ensemble:
2026-07-06
Issued:
2026-07-06
Hide Forecast
Forecast
Period
Forecasts Are in KAF
30 Year
Average
(1991-2020)
90 %
50 %
%
Average
10 %
APR-SEP
23588
24069
100
25128
24059
APR-JUL
19589
19806
105
20159
18779
JAN-SEP
26417
26898
104
27957
25978
JAN-JUL
22418
22635
109
22988
20698
OCT-SEP
29437
29919
103
30977
29084
Experimental Water Supply
HEFS with 15 days EQPF
Ensemble:
2026-07-06
Issued:
2026-07-06
Hide Forecast
APR-SEP
23583
24028
100
25105
24059
APR-JUL
19454
19778
105
20016
18779
JAN-SEP
26412
26857
103
27934
25978
JAN-JUL
22283
22607
109
22845
20698
OCT-SEP
29433
29878
103
30955
29084
Reference
ESP with 0 Days QPF
Ensemble:
2026-07-06
Issued:
2026-07-06
Hide Forecast
APR-SEP
23976
24502
102
26066
24059
APR-JUL
19787
20207
108
20742
18779
JAN-SEP
26805
27331
105
28895
25978
JAN-JUL
22616
23036
111
23571
20698
OCT-SEP
29826
30352
104
31916
29084
Move the mouse over the desired "Forecast Period" to display a graph.
ESP10, 246, 304, 342, 379, 444, 70, , 74
ESP10, 241, 298, 339, 375, 438, 73, , 77
ESP10, 244, 301, 344, 376, 440, 75, , 79
ESP10, 241, 300, 348, 376, 437, 78, , 82
ESP10, 236, 296, 346, 370, 431, 80, , 84
ESP10, 235, 296, 348, 371, 438, 82, , 86
ESP10, 240, 301, 355, 374, 449, 85, , 89
ESP10, 241, 301, 356, 379, 451, 87, , 91
ESP10, 245, 302, 358, 383, 454, 90, , 94
ESP10, 240, 299, 358, 380, 454, 92, , 96
ESP10, 245, 300, 358, 384, 456, 94, , 98
ESP10, 242, 297, 354, 379, 451, 97, , 101
ESP10, 230, 288, 343, 371, 440, 99, , 103
ESP10, 236, 293, 350, 378, 444, 102, , 106
ESP10, 240, 298, 351, 380, 447, 104, , 108
ESP10, 232, 290, 340, 376, 437, 106, , 110
ESP10, 227, 284, 339, 373, 433, 109, , 113
ESP10, 246, 298, 353, 388, 445, 111, , 115
ESP10, 245, 298, 350, 389, 444, 113, , 117
ESP10, 243, 296, 347, 385, 440, 116, , 120
ESP10, 236, 291, 341, 379, 435, 118, , 122
ESP10, 224, 281, 331, 377, 424, 121, , 125
ESP10, 231, 283, 340, 380, 426, 123, , 127
ESP10, 232, 283, 339, 379, 426, 125, , 129
ESP10, 233, 285, 341, 380, 429, 128, , 132
ESP10, 248, 297, 362, 394, 440, 130, , 134
ESP10, 246, 293, 357, 395, 440, 133, , 137
ESP10, 255, 292, 357, 394, 438, 135, , 139
ESP10, 248, 292, 347, 385, 427, 137, , 141
ESP10, 251, 286, 338, 378, 419, 140, , 144
ESP10, 254, 289, 343, 380, 426, 142, , 146
ESP10, 256, 297, 342, 380, 431, 145, , 149
ESP10, 255, 300, 340, 384, 432, 147, , 151
ESP10, 266, 306, 346, 388, 439, 149, , 153
ESP10, 268, 309, 353, 393, 441, 152, , 156
ESP10, 263, 305, 351, 392, 433, 154, , 158
ESP10, 262, 303, 354, 391, 433, 157, , 161
ESP10, 253, 297, 346, 386, 423, 159, , 163
ESP10, 265, 309, 355, 396, 433, 161, , 165
ESP10, 258, 303, 349, 394, 429, 164, , 168
ESP10, 251, 300, 343, 385, 421, 166, , 170
ESP10, 250, 302, 342, 381, 418, 169, , 173
ESP10, 272, 324, 357, 394, 433, 171, , 175
ESP10, 281, 330, 366, 402, 440, 173, , 177
ESP10, 273, 323, 357, 396, 430, 176, , 180
ESP10, 282, 328, 364, 405, 435, 178, , 182
ESP10, 276, 326, 360, 400, 429, 180, , 184
ESP10, 276, 326, 364, 402, 435, 183, , 187
ESP10, 266, 320, 358, 397, 426, 185, , 189
ESP10, 266, 321, 359, 397, 430, 188, , 192
ESP10, 277, 330, 367, 407, 440, 190, , 194
ESP10, 272, 323, 360, 399, 432, 192, , 196
ESP10, 271, 322, 360, 397, 428, 195, , 199
ESP10, 280, 332, 369, 409, 434, 197, , 201
ESP10, 276, 332, 368, 408, 430, 200, , 204
ESP10, 271, 332, 362, 402, 426, 202, , 206
ESP10, 268, 332, 362, 402, 428, 204, , 208
ESP10, 269, 334, 360, 399, 433, 207, , 211
ESP10, 265, 330, 362, 394, 430, 209, , 213
ESP10, 266, 324, 357, 390, 429, 212, , 216
ESP10, 254, 315, 351, 378, 422, 214, , 218
ESP10, 255, 314, 350, 381, 423, 216, , 220
ESP10, 257, 319, 350, 383, 424, 219, , 223
ESP10, 249, 307, 346, 372, 425, 221, , 225
ESP10, 243, 303, 340, 368, 424, 224, , 228
ESP10, 244, 302, 341, 372, 422, 226, , 230
ESP10, 249, 308, 348, 379, 427, 228, , 232
ESP10, 235, 296, 336, 369, 413, 231, , 235
ESP10, 207, 268, 310, 347, 386, 233, , 237
ESP10, 205, 266, 306, 348, 384, 236, , 240
ESP10, 210, 271, 313, 354, 391, 238, , 242
ESP10, 217, 279, 320, 363, 399, 240, , 244
ESP10, 217, 284, 320, 363, 399, 243, , 247
ESP10, 207, 275, 310, 356, 395, 245, , 249
ESP10, 200, 272, 303, 351, 389, 247, , 251
ESP10, 192, 266, 295, 345, 384, 250, , 254
ESP10, 191, 265, 291, 347, 381, 252, , 256
ESP10, 190, 259, 284, 341, 378, 255, , 259
ESP10, 180, 243, 267, 328, 364, 257, , 261
ESP10, 176, 236, 265, 321, 362, 259, , 263
ESP10, 184, 240, 269, 326, 365, 262, , 266
ESP10, 177, 234, 267, 316, 356, 264, , 268
ESP10, 185, 246, 275, 328, 363, 267, , 271
ESP10, 188, 255, 280, 335, 366, 269, , 273
ESP10, 185, 251, 281, 331, 361, 271, , 275
ESP10, 181, 246, 282, 325, 355, 274, , 278
ESP10, 184, 248, 282, 326, 361, 276, , 280
ESP10, 187, 248, 281, 328, 359, 279, , 283
ESP10, 193, 247, 284, 325, 357, 281, , 285
ESP10, 197, 251, 287, 326, 357, 283, , 287
ESP10, 194, 248, 288, 325, 353, 286, , 290
ESP10, 196, 247, 285, 327, 351, 288, , 292
ESP10, 195, 246, 285, 326, 349, 291, , 295
ESP10, 200, 253, 289, 327, 353, 293, , 297
ESP10, 200, 246, 285, 320, 353, 295, , 299
ESP10, 205, 245, 283, 321, 357, 298, , 302
ESP10, 199, 240, 278, 316, 357, 300, , 304
ESP10, 194, 232, 271, 310, 352, 303, , 307
ESP10, 192, 227, 267, 309, 349, 305, , 309
ESP10, 191, 223, 260, 305, 342, 307, , 311
ESP10, 186, 220, 258, 303, 340, 310, , 314
ESP10, 188, 223, 257, 304, 340, 312, , 316
ESP10, 187, 224, 255, 303, 337, 314, , 318
ESP10, 190, 224, 263, 302, 337, 317, , 321
ESP10, 189, 223, 259, 298, 338, 319, , 323
ESP10, 191, 226, 259, 301, 340, 322, , 326
ESP10, 196, 226, 260, 302, 341, 324, , 328
ESP10, 196, 231, 261, 309, 341, 326, , 330
ESP10, 198, 233, 266, 311, 347, 329, , 333
ESP10, 202, 239, 272, 314, 353, 331, , 335
ESP10, 211, 242, 278, 318, 357, 334, , 338
ESP10, 216, 247, 280, 321, 365, 336, , 340
ESP10, 214, 246, 279, 321, 365, 338, , 342
ESP10, 218, 252, 286, 326, 369, 341, , 345
ESP10, 217, 253, 286, 324, 368, 343, , 347
ESP10, 208, 246, 276, 315, 358, 346, , 350
ESP10, 215, 256, 282, 318, 362, 348, , 352
ESP10, 216, 258, 284, 324, 364, 350, , 354
ESP10, 217, 264, 285, 328, 365, 353, , 357
ESP10, 214, 263, 288, 327, 362, 355, , 359
ESP10, 211, 260, 284, 324, 358, 358, , 362
ESP10, 203, 249, 271, 318, 347, 360, , 364
ESP10, 194, 240, 263, 312, 340, 362, , 366
ESP10, 209, 247, 273, 317, 348, 365, , 369
ESP10, 208, 246, 270, 313, 348, 367, , 371
ESP10, 211, 243, 270, 311, 344, 370, , 374
ESP10, 207, 243, 268, 307, 341, 372, , 376
ESP10, 220, 254, 279, 315, 354, 374, , 378
ESP10, 226, 259, 282, 316, 355, 377, , 381
ESP10, 216, 251, 274, 309, 346, 379, , 383
ESP10, 220, 257, 276, 316, 347, 381, , 385
ESP10, 222, 259, 277, 320, 347, 384, , 388
ESP10, 218, 254, 271, 314, 339, 386, , 390
ESP10, 221, 260, 275, 318, 343, 389, , 393
ESP10, 220, 261, 279, 317, 342, 391, , 395
ESP10, 210, 249, 268, 309, 338, 393, , 397
ESP10, 209, 247, 267, 311, 336, 396, , 400
ESP10, 215, 253, 273, 317, 340, 398, , 402
ESP10, 207, 245, 267, 309, 333, 401, , 405
ESP10, 211, 250, 272, 317, 338, 403, , 407
ESP10, 205, 247, 264, 308, 330, 405, , 409
ESP10, 210, 252, 272, 314, 335, 408, , 412
ESP10, 208, 247, 268, 313, 331, 410, , 414
ESP10, 216, 253, 271, 316, 336, 413, , 417
ESP10, 212, 249, 270, 311, 332, 415, , 419
ESP10, 213, 250, 267, 308, 328, 417, , 421
ESP10, 217, 250, 268, 312, 329, 420, , 424
ESP10, 207, 243, 257, 302, 318, 422, , 426
ESP10, 202, 232, 249, 292, 308, 425, , 429
ESP10, 190, 218, 238, 279, 293, 427, , 431
ESP10, 185, 221, 232, 274, 286, 429, , 433
ESP10, 181, 216, 231, 268, 281, 432, , 436
ESP10, 172, 207, 228, 259, 272, 434, , 438
ESP10, 169, 203, 230, 257, 269, 437, , 441
ESP10, 168, 198, 226, 253, 264, 439, , 443
ESP10, 169, 203, 228, 252, 264, 441, , 445
ESP10, 159, 192, 215, 241, 252, 444, , 448
ESP10, 167, 189, 211, 237, 250, 446, , 450
ESP10, 155, 181, 200, 226, 240, 448, , 452
ESP10, 161, 184, 204, 231, 243, 451, , 455
ESP10, 157, 179, 197, 226, 239, 453, , 457
ESP10, 150, 169, 188, 222, 231, 456, , 460
ESP10, 136, 156, 177, 208, 218, 458, , 462
ESP10, 154, 169, 190, 220, 234, 460, , 464
ESP10, 148, 163, 186, 214, 228, 463, , 467
ESP10, 150, 162, 183, 209, 224, 465, , 469
ESP10, 152, 164, 187, 212, 227, 468, , 472
ESP10, 158, 172, 192, 215, 230, 470, , 474
ESP10, 155, 169, 188, 210, 228, 472, , 476
ESP10, 155, 169, 190, 208, 225, 475, , 479
ESP10, 153, 171, 190, 208, 222, 477, , 481
ESP10, 164, 183, 200, 220, 232, 480, , 484
ESP10, 167, 181, 200, 219, 231, 482, , 486
ESP10, 167, 179, 197, 219, 229, 484, , 488
ESP10, 161, 173, 191, 213, 222, 487, , 491
ESP10, 166, 174, 194, 214, 226, 489, , 493
ESP10, 177, 186, 206, 225, 237, 492, , 496
ESP10, 177, 187, 208, 225, 238, 494, , 498
ESP10, 180, 191, 213, 232, 244, 496, , 500
ESP10, 179, 192, 214, 233, 244, 499, , 503
ESP10, 188, 205, 224, 243, 258, 501, , 505
ESP10, 193, 207, 227, 246, 260, 504, , 508
ESP10, 190, 209, 226, 245, 258, 506, , 510
ESP10, 192, 212, 231, 246, 262, 508, , 512
ESP10, 195, 209, 231, 248, 261, 511, , 515
ESP10, 194, 208, 231, 248, 259, 513, , 517
ESP10, 190, 203, 226, 244, 254, 515, , 519
ESP10, 188, 200, 226, 242, 251, 518, , 522
ESP10, 187, 200, 225, 242, 250, 520, , 524
ESP10, 181, 196, 220, 236, 246, 523, , 527
ESP10, 179, 194, 218, 234, 244, 525, , 529
ESP10, 177, 191, 216, 233, 241, 527, , 531
ESP10, 183, 197, 225, 240, 246, 530, , 534
ESP10, 185, 206, 226, 242, 248, 532, , 536
ESP10, 185, 207, 226, 243, 249, 535, , 539
ESP10, 186, 207, 225, 242, 250, 537, , 541
ESP10, 191, 210, 229, 245, 254, 539, , 543
ESP10, 189, 206, 227, 244, 252, 542, , 546
ESP10, 189, 208, 226, 242, 258, 544, , 548
ESP10, 189, 210, 227, 244, 257, 547, , 551
ESP10, 193, 215, 231, 250, 261, 549, , 553
ESP10, 200, 220, 236, 256, 266, 551, , 555
ESP10, 201, 220, 237, 255, 266, 554, , 558
ESP10, 212, 233, 247, 265, 279, 556, , 560
ESP10, 215, 236, 249, 266, 283, 559, , 563
ESP10, 215, 236, 249, 267, 284, 561, , 565
ESP10, 213, 234, 250, 265, 283, 563, , 567
ESP10, 215, 235, 250, 266, 284, 566, , 570
ESP10, 222, 239, 255, 269, 288, 568, , 572
ESP10, 221, 240, 253, 268, 286, 571, , 575
ESP10, 222, 241, 257, 271, 287, 573, , 577
ESP10, 224, 244, 260, 274, 289, 575, , 579
ESP10, 229, 247, 261, 275, 291, 578, , 582
ESP10, 228, 247, 261, 277, 290, 580, , 584
ESP10, 227, 248, 260, 279, 290, 582, , 586
ESP10, 225, 248, 261, 278, 292, 585, , 589
ESP10, 228, 250, 264, 281, 294, 587, , 591
ESP10, 228, 251, 266, 281, 293, 590, , 594
ESP10, 228, 250, 267, 280, 294, 592, , 596
ESP10, 227, 252, 267, 280, 293, 594, , 598
ESP10, 225, 249, 265, 278, 289, 597, , 601
ESP10, 223, 248, 264, 277, 290, 599, , 603
ESP10, 218, 243, 260, 275, 286, 602, , 606
ESP10, 216, 241, 258, 274, 287, 604, , 608
ESP10, 217, 242, 260, 276, 288, 606, , 610
ESP10, 216, 243, 259, 276, 285, 609, , 613
ESP10, 212, 240, 256, 274, 284, 611, , 615
ESP10, 222, 247, 262, 280, 290, 614, , 618
ESP10, 223, 248, 266, 280, 290, 616, , 620
ESP10, 232, 256, 274, 289, 301, 618, , 622
ESP10, 229, 252, 270, 285, 298, 621, , 625
ESP10, 226, 247, 266, 279, 293, 623, , 627
ESP10, 228, 251, 268, 280, 293, 626, , 630
ESP10, 227, 250, 267, 280, 291, 628, , 632
ESP10, 231, 252, 270, 283, 293, 630, , 634
ESP10, 221, 242, 260, 272, 282, 633, , 637
ESP10, 226, 247, 266, 279, 286, 635, , 639
ESP10, 229, 246, 262, 275, 286, 638, , 642
ESP10, 238, 254, 271, 286, 294, 640, , 644
ESP10, 229, 245, 261, 276, 287, 642, , 646
ESP10, 230, 240, 257, 274, 286, 645, , 649
ESP10, 227, 238, 254, 272, 282, 647, , 651
ESP10, 234, 243, 261, 278, 289, 649, , 653
ESP10, 232, 243, 260, 276, 286, 652, , 656
ESP10, 235, 247, 262, 278, 291, 654, , 658
ESP10, 242, 253, 269, 283, 295, 657, , 661
ESP10, 246, 258, 276, 290, 299, 659, , 663
ESP10, 244, 256, 276, 290, 299, 661, , 665
ESP10, 241, 254, 273, 287, 295, 664, , 668
ESP10, 238, 251, 273, 285, 292, 666, , 670
ESP10, 254, 266, 286, 300, 306, 669, , 673
ESP10, 255, 268, 286, 300, 309, 671, , 675
ESP10, 264, 277, 295, 307, 317, 673, , 677
ESP10, 259, 273, 290, 304, 313, 676, , 680
ESP10, 257, 272, 291, 303, 311, 678, , 682
ESP10, 258, 273, 293, 304, 311, 681, , 685
ESP10, 260, 278, 296, 306, 313, 683, , 687
ESP10, 254, 271, 290, 301, 307, 685, , 689
ESP10, 254, 270, 290, 300, 306, 688, , 692
ESP10, 259, 277, 294, 306, 312, 690, , 694
ESP10, 261, 281, 296, 309, 315, 693, , 697
ESP10, 262, 282, 294, 308, 313, 695, , 699
ESP10, 263, 282, 299, 308, 314, 697, , 701
ESP10, 258, 278, 295, 304, 312, 700, , 704
ESP10, 280, 297, 313, 322, 333, 702, , 706
ESP10, 273, 290, 308, 316, 325, 705, , 709
ESP10, 276, 293, 312, 321, 328, 707, , 711
ESP10, 271, 288, 307, 316, 322, 709, , 713
ESP10, 274, 288, 309, 316, 323, 712, , 716
ESP10, 273, 292, 309, 316, 324, 714, , 718
ESP10, 282, 296, 315, 322, 329, 716, , 720
ESP10, 285, 296, 315, 322, 330, 719, , 723
ESP10, 284, 292, 313, 320, 328, 721, , 725
ESP10, 287, 292, 313, 321, 327, 724, , 728
ESP10, 284, 290, 312, 320, 326, 726, , 730
ESP10, 292, 301, 321, 327, 334, 728, , 732
ESP10, 308, 315, 331, 337, 341, 731, , 735
ESP10, 308, 317, 330, 337, 341, 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/ARDQ2IW_SQIN.ESPF10.csv
ARDQ2IW_SQIN.ESPF0.csv|2026-07-06
ARDQ2IW_SQIN.ESPF10.csv|2026-07-06
ARDQ2IW_SQIN.ESPFM.csv|2026-07-06
APR-SEP
COLUMBIA - ARROW LAKES (HUGH KEENLEYSIDE DAM)
(
ARDQ2
)
Forecasts for Water Year
2027
Official Water Supply
ESP with 10 Days QPF
Ensemble:
2026-07-06
Issued:
2026-07-06
Hide Forecast
Forecast
Period
Forecasts Are in KAF
30 Year
Average
(1991-2020)
90 %
50 %
%
Average
10 %
APR-SEP
18682
23925
99
28731
24059
APR-JUL
14628
18306
97
22350
18779
JAN-SEP
20318
25678
99
30461
25978
JAN-JUL
16195
20580
99
24026
20698
OCT-SEP
22914
28488
98
33261
29084
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/ARDQ2IW_SQIN.ESPF10.csv
ARDQ2IW_SQIN.ESPF0.csv|2026-07-06
ARDQ2IW_SQIN.ESPF10.csv|2026-07-06
ARDQ2IW_SQIN.ESPFM.csv|2026-07-06
APR-SEP
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ESP10,ESPM,ESP0
ESP10,ESPM,ESP0
Last Forecast
