Choose Date:
Archive:
Water Year
Loading...
COLUMBIA - GRAND COULEE DAM
(
GCDW1
)
Forecasts for Water Year
2025
Natural Forecast
ESP with 10 Days QPF
Ensemble:
2025-07-12
Issued:
2025-07-12
Hide Forecast
Forecast
Period
Forecasts Are in KAF
30 Year
Average
(1991-2020)
90 %
50 %
%
Average
10 %
APR-SEP
47566
48095
77
49089
62538
APR-JUL
39705
39744
76
39796
52578
APR-AUG
44686
44876
76
45241
58757
JAN-SEP
54464
54992
77
55986
71301
JAN-JUL
46603
46641
76
46694
61341
OCT-SEP
63224
63753
79
64747
80441
Experimental
HEFS with 15 days EQPF
Ensemble:
2025-07-12
Issued:
2025-07-12
Hide Forecast
APR-SEP
47840
48306
77
49568
62538
APR-JUL
39696
39862
76
40147
52578
APR-AUG
44753
45154
77
45883
58757
JAN-SEP
54737
55203
77
56465
71301
JAN-JUL
46593
46759
76
47044
61341
OCT-SEP
63498
63964
80
65226
80441
Reference
ESP with 0 Days QPF
Ensemble:
2025-07-12
Issued:
2025-07-12
Hide Forecast
APR-SEP
47748
48169
77
49360
62538
APR-JUL
39622
39794
76
40093
52578
APR-AUG
44668
45022
77
45703
58757
JAN-SEP
54645
55066
77
56258
71301
JAN-JUL
46519
46691
76
46990
61341
OCT-SEP
63406
63827
79
65018
80441
Move the mouse over the desired "Forecast Period" to display a graph.
ESP10, 192, 262, 325, 378, 412, 70, , 74
ESP10, 195, 264, 325, 381, 414, 73, , 77
ESP10, 197, 266, 325, 383, 418, 75, , 79
ESP10, 196, 271, 323, 381, 417, 77, , 81
ESP10, 197, 275, 327, 380, 416, 80, , 84
ESP10, 197, 276, 331, 380, 421, 82, , 86
ESP10, 201, 279, 330, 380, 426, 84, , 88
ESP10, 203, 278, 332, 381, 425, 87, , 91
ESP10, 196, 271, 324, 372, 418, 89, , 93
ESP10, 195, 271, 321, 369, 418, 91, , 95
ESP10, 194, 275, 320, 366, 414, 94, , 98
ESP10, 191, 274, 318, 369, 412, 96, , 100
ESP10, 197, 279, 324, 375, 420, 98, , 102
ESP10, 200, 281, 327, 378, 423, 101, , 105
ESP10, 202, 279, 326, 375, 422, 103, , 107
ESP10, 194, 274, 318, 367, 419, 105, , 109
ESP10, 191, 270, 315, 370, 415, 108, , 112
ESP10, 184, 263, 311, 363, 409, 110, , 114
ESP10, 180, 258, 315, 361, 409, 113, , 117
ESP10, 175, 254, 313, 365, 410, 115, , 119
ESP10, 174, 256, 317, 363, 409, 117, , 121
ESP10, 183, 266, 324, 374, 416, 120, , 124
ESP10, 177, 267, 318, 374, 416, 122, , 126
ESP10, 181, 273, 325, 378, 421, 124, , 128
ESP10, 185, 275, 326, 379, 422, 127, , 131
ESP10, 188, 286, 331, 386, 425, 129, , 133
ESP10, 196, 297, 336, 391, 432, 131, , 135
ESP10, 204, 301, 342, 397, 438, 134, , 138
ESP10, 201, 298, 341, 395, 436, 136, , 140
ESP10, 197, 294, 339, 393, 435, 138, , 142
ESP10, 181, 278, 328, 380, 427, 141, , 145
ESP10, 179, 274, 325, 374, 426, 143, , 147
ESP10, 181, 274, 329, 373, 428, 145, , 149
ESP10, 176, 271, 322, 364, 423, 148, , 152
ESP10, 173, 264, 312, 355, 413, 150, , 154
ESP10, 172, 262, 309, 354, 410, 152, , 156
ESP10, 179, 265, 313, 359, 415, 155, , 159
ESP10, 170, 252, 308, 350, 405, 157, , 161
ESP10, 168, 249, 305, 348, 404, 159, , 163
ESP10, 178, 262, 320, 359, 414, 162, , 166
ESP10, 198, 279, 334, 371, 428, 164, , 168
ESP10, 203, 281, 335, 382, 428, 166, , 170
ESP10, 194, 269, 325, 371, 417, 169, , 173
ESP10, 203, 279, 330, 371, 422, 171, , 175
ESP10, 166, 248, 293, 332, 385, 173, , 177
ESP10, 160, 236, 285, 323, 377, 176, , 180
ESP10, 167, 240, 290, 334, 386, 178, , 182
ESP10, 181, 251, 305, 344, 402, 180, , 184
ESP10, 186, 255, 314, 351, 407, 183, , 187
ESP10, 195, 262, 320, 356, 416, 185, , 189
ESP10, 196, 262, 312, 354, 410, 187, , 191
ESP10, 205, 275, 316, 362, 414, 190, , 194
ESP10, 213, 288, 333, 369, 420, 192, , 196
ESP10, 209, 285, 331, 371, 416, 195, , 199
ESP10, 202, 280, 323, 368, 408, 197, , 201
ESP10, 211, 282, 324, 370, 416, 199, , 203
ESP10, 206, 274, 315, 361, 409, 202, , 206
ESP10, 209, 275, 316, 367, 412, 204, , 208
ESP10, 212, 279, 321, 377, 415, 206, , 210
ESP10, 224, 284, 333, 382, 420, 209, , 213
ESP10, 225, 283, 334, 386, 421, 211, , 215
ESP10, 222, 278, 331, 381, 418, 213, , 217
ESP10, 226, 277, 332, 380, 417, 216, , 220
ESP10, 222, 268, 323, 371, 416, 218, , 222
ESP10, 227, 273, 334, 377, 425, 220, , 224
ESP10, 230, 279, 341, 379, 430, 223, , 227
ESP10, 223, 271, 334, 372, 424, 225, , 229
ESP10, 232, 282, 344, 380, 431, 227, , 231
ESP10, 229, 278, 339, 377, 429, 230, , 234
ESP10, 229, 281, 335, 371, 426, 232, , 236
ESP10, 243, 305, 351, 384, 442, 234, , 238
ESP10, 244, 312, 351, 386, 444, 237, , 241
ESP10, 238, 306, 346, 384, 439, 239, , 243
ESP10, 231, 296, 339, 375, 431, 241, , 245
ESP10, 222, 278, 333, 360, 417, 244, , 248
ESP10, 217, 270, 326, 355, 410, 246, , 250
ESP10, 220, 270, 332, 357, 412, 248, , 252
ESP10, 225, 277, 337, 362, 416, 251, , 255
ESP10, 228, 279, 338, 365, 416, 253, , 257
ESP10, 229, 273, 326, 356, 408, 255, , 259
ESP10, 225, 265, 315, 347, 399, 258, , 262
ESP10, 238, 273, 320, 352, 405, 260, , 264
ESP10, 234, 271, 315, 345, 402, 262, , 266
ESP10, 247, 281, 325, 358, 412, 265, , 269
ESP10, 241, 272, 320, 354, 406, 267, , 271
ESP10, 250, 283, 328, 368, 416, 269, , 273
ESP10, 242, 277, 323, 360, 411, 272, , 276
ESP10, 247, 280, 325, 360, 423, 274, , 278
ESP10, 246, 284, 326, 360, 421, 276, , 280
ESP10, 255, 290, 333, 365, 424, 279, , 283
ESP10, 258, 295, 340, 368, 423, 281, , 285
ESP10, 248, 289, 330, 359, 414, 284, , 288
ESP10, 252, 293, 340, 364, 419, 286, , 290
ESP10, 257, 300, 346, 370, 427, 288, , 292
ESP10, 256, 314, 350, 375, 430, 293, , 297
ESP10, 260, 313, 353, 375, 431, 295, , 299
ESP10, 263, 315, 353, 380, 433, 298, , 302
ESP10, 269, 317, 354, 382, 435, 300, , 304
ESP10, 276, 319, 355, 387, 436, 302, , 306
ESP10, 278, 322, 357, 392, 437, 305, , 309
ESP10, 284, 322, 360, 396, 440, 307, , 311
ESP10, 286, 322, 360, 397, 439, 309, , 313
ESP10, 284, 328, 363, 399, 436, 312, , 316
ESP10, 287, 329, 367, 399, 439, 314, , 318
ESP10, 291, 336, 369, 400, 440, 316, , 320
ESP10, 299, 344, 373, 404, 444, 319, , 323
ESP10, 299, 345, 375, 405, 444, 321, , 325
ESP10, 302, 350, 377, 405, 446, 323, , 327
ESP10, 309, 356, 384, 412, 450, 326, , 330
ESP10, 312, 360, 384, 412, 449, 328, , 332
ESP10, 315, 363, 386, 415, 450, 330, , 334
ESP10, 313, 361, 385, 413, 447, 333, , 337
ESP10, 309, 358, 386, 410, 445, 335, , 339
ESP10, 310, 359, 387, 412, 446, 337, , 341
ESP10, 314, 361, 389, 415, 447, 340, , 344
ESP10, 309, 360, 384, 412, 441, 342, , 346
ESP10, 304, 362, 379, 408, 437, 344, , 348
ESP10, 311, 366, 382, 411, 443, 347, , 351
ESP10, 309, 366, 381, 412, 446, 349, , 353
ESP10, 309, 368, 384, 413, 448, 351, , 355
ESP10, 317, 372, 389, 417, 454, 354, , 358
ESP10, 316, 370, 389, 417, 454, 356, , 360
ESP10, 317, 368, 387, 414, 453, 358, , 362
ESP10, 322, 370, 388, 413, 455, 361, , 365
ESP10, 321, 368, 387, 411, 453, 363, , 367
ESP10, 326, 368, 387, 411, 453, 366, , 370
ESP10, 326, 371, 386, 412, 453, 368, , 372
ESP10, 319, 360, 377, 403, 442, 370, , 374
ESP10, 327, 369, 389, 414, 448, 373, , 377
ESP10, 327, 372, 390, 413, 445, 375, , 379
ESP10, 334, 376, 396, 417, 448, 377, , 381
ESP10, 340, 380, 403, 420, 452, 380, , 384
ESP10, 340, 381, 402, 421, 450, 382, , 386
ESP10, 341, 383, 402, 424, 450, 384, , 388
ESP10, 327, 373, 391, 411, 437, 387, , 391
ESP10, 321, 367, 383, 404, 432, 389, , 393
ESP10, 317, 362, 383, 400, 429, 391, , 395
ESP10, 323, 364, 388, 402, 431, 394, , 398
ESP10, 325, 364, 388, 405, 433, 396, , 400
ESP10, 328, 364, 390, 409, 435, 398, , 402
ESP10, 330, 365, 388, 407, 434, 401, , 405
ESP10, 325, 358, 382, 401, 429, 403, , 407
ESP10, 320, 348, 374, 397, 423, 405, , 409
ESP10, 330, 355, 380, 406, 431, 408, , 412
ESP10, 338, 365, 388, 415, 439, 410, , 414
ESP10, 340, 370, 391, 417, 441, 412, , 416
ESP10, 342, 371, 393, 416, 441, 415, , 419
ESP10, 341, 371, 392, 412, 438, 417, , 421
ESP10, 342, 369, 388, 406, 432, 419, , 423
ESP10, 340, 366, 386, 402, 427, 422, , 426
ESP10, 345, 367, 388, 404, 428, 424, , 428
ESP10, 345, 370, 389, 403, 427, 426, , 430
ESP10, 349, 373, 399, 407, 433, 429, , 433
ESP10, 340, 369, 392, 402, 424, 431, , 435
ESP10, 336, 363, 384, 397, 417, 433, , 437
ESP10, 326, 353, 373, 387, 408, 436, , 440
ESP10, 331, 360, 376, 392, 412, 438, , 442
ESP10, 334, 363, 377, 395, 415, 440, , 444
ESP10, 333, 362, 375, 393, 412, 443, , 447
ESP10, 328, 359, 372, 388, 407, 445, , 449
ESP10, 319, 351, 366, 381, 401, 448, , 452
ESP10, 319, 347, 360, 379, 396, 450, , 454
ESP10, 314, 341, 352, 374, 390, 452, , 456
ESP10, 309, 337, 349, 370, 390, 455, , 459
ESP10, 308, 335, 346, 368, 389, 457, , 461
ESP10, 308, 332, 343, 364, 386, 459, , 463
ESP10, 302, 325, 339, 358, 381, 462, , 466
ESP10, 306, 328, 344, 362, 386, 464, , 468
ESP10, 308, 330, 346, 363, 390, 466, , 470
ESP10, 302, 320, 336, 352, 381, 469, , 473
ESP10, 302, 316, 332, 345, 376, 471, , 475
ESP10, 299, 314, 329, 341, 371, 473, , 477
ESP10, 283, 298, 316, 327, 355, 476, , 480
ESP10, 282, 298, 316, 327, 354, 478, , 482
ESP10, 279, 297, 316, 330, 352, 480, , 484
ESP10, 288, 308, 327, 341, 363, 483, , 487
ESP10, 288, 310, 329, 346, 365, 485, , 489
ESP10, 290, 316, 333, 350, 369, 487, , 491
ESP10, 297, 321, 339, 357, 374, 490, , 494
ESP10, 300, 323, 340, 360, 375, 492, , 496
ESP10, 295, 319, 335, 354, 371, 494, , 498
ESP10, 299, 325, 340, 357, 376, 497, , 501
ESP10, 291, 318, 335, 349, 369, 499, , 503
ESP10, 285, 314, 334, 347, 365, 501, , 505
ESP10, 284, 314, 333, 349, 368, 504, , 508
ESP10, 288, 320, 338, 355, 372, 506, , 510
ESP10, 289, 324, 340, 358, 374, 508, , 512
ESP10, 287, 321, 337, 355, 372, 511, , 515
ESP10, 289, 322, 337, 356, 371, 513, , 517
ESP10, 289, 323, 338, 356, 370, 515, , 519
ESP10, 292, 327, 341, 359, 373, 518, , 522
ESP10, 291, 324, 339, 357, 370, 520, , 524
ESP10, 289, 320, 335, 352, 367, 522, , 526
ESP10, 292, 324, 334, 354, 366, 525, , 529
ESP10, 300, 333, 341, 362, 376, 527, , 531
ESP10, 304, 333, 342, 362, 377, 530, , 534
ESP10, 306, 336, 344, 365, 377, 532, , 536
ESP10, 304, 330, 344, 361, 372, 534, , 538
ESP10, 305, 330, 345, 362, 373, 537, , 541
ESP10, 305, 331, 346, 363, 374, 539, , 543
ESP10, 305, 331, 347, 365, 375, 541, , 545
ESP10, 310, 336, 353, 371, 380, 544, , 548
ESP10, 315, 341, 360, 377, 386, 546, , 550
ESP10, 316, 344, 361, 378, 390, 548, , 552
ESP10, 317, 346, 362, 382, 393, 551, , 555
ESP10, 313, 346, 359, 378, 390, 553, , 557
ESP10, 311, 345, 358, 376, 389, 555, , 559
ESP10, 311, 346, 359, 375, 390, 558, , 562
ESP10, 317, 353, 366, 381, 395, 560, , 564
ESP10, 315, 351, 366, 380, 392, 562, , 566
ESP10, 318, 353, 367, 383, 394, 565, , 569
ESP10, 313, 348, 361, 377, 388, 567, , 571
ESP10, 314, 349, 363, 379, 388, 569, , 573
ESP10, 314, 346, 361, 376, 384, 572, , 576
ESP10, 315, 343, 360, 374, 382, 574, , 578
ESP10, 309, 335, 351, 368, 373, 576, , 580
ESP10, 311, 336, 355, 369, 377, 579, , 583
ESP10, 320, 344, 363, 378, 390, 581, , 585
ESP10, 315, 337, 357, 372, 384, 583, , 587
ESP10, 325, 348, 368, 380, 391, 586, , 590
ESP10, 327, 348, 365, 380, 388, 588, , 592
ESP10, 331, 350, 365, 380, 389, 590, , 594
ESP10, 336, 357, 374, 385, 394, 593, , 597
ESP10, 334, 353, 372, 383, 390, 595, , 599
ESP10, 342, 357, 377, 387, 398, 597, , 601
ESP10, 343, 353, 375, 386, 396, 600, , 604
ESP10, 341, 352, 373, 382, 392, 602, , 606
ESP10, 340, 353, 374, 383, 391, 604, , 608
ESP10, 342, 357, 375, 384, 393, 607, , 611
ESP10, 344, 361, 379, 387, 397, 609, , 613
ESP10, 348, 364, 382, 391, 400, 611, , 615
ESP10, 350, 368, 380, 388, 398, 614, , 618
ESP10, 355, 374, 387, 394, 404, 616, , 620
ESP10, 352, 370, 383, 393, 400, 619, , 623
ESP10, 351, 368, 381, 390, 399, 621, , 625
ESP10, 348, 361, 374, 383, 393, 623, , 627
ESP10, 351, 364, 375, 387, 392, 626, , 630
ESP10, 351, 364, 375, 387, 390, 628, , 632
ESP10, 356, 369, 380, 391, 394, 630, , 634
ESP10, 364, 377, 387, 397, 401, 633, , 637
ESP10, 367, 378, 389, 398, 405, 635, , 639
ESP10, 367, 378, 390, 398, 406, 637, , 641
ESP10, 368, 378, 389, 399, 404, 640, , 644
ESP10, 366, 375, 385, 396, 401, 642, , 646
ESP10, 374, 383, 395, 402, 408, 644, , 648
ESP10, 371, 381, 390, 400, 405, 647, , 651
ESP10, 369, 380, 388, 398, 403, 649, , 653
ESP10, 373, 379, 387, 398, 403, 651, , 655
ESP10, 379, 387, 395, 404, 408, 654, , 658
ESP10, 377, 385, 394, 397, 401, 677, , 681
ESP10, 378, 388, 396, 400, 403, 679, , 683
ESP10, 378, 389, 395, 399, 403, 682, , 686
ESP10, 382, 394, 400, 403, 407, 684, , 688
ESP10, 385, 396, 403, 407, 410, 686, , 690
ESP10, 388, 397, 404, 407, 411, 689, , 693
ESP10, 392, 401, 407, 411, 413, 691, , 695
ESP10, 393, 402, 407, 411, 413, 693, , 697
ESP10, 392, 401, 407, 410, 412, 696, , 700
ESP10, 396, 405, 411, 413, 416, 698, , 702
ESP10, 396, 406, 410, 413, 415, 701, , 705
ESP10, 397, 405, 409, 413, 415, 703, , 707
ESP10, 402, 408, 412, 416, 417, 705, , 709
ESP10, 402, 407, 412, 415, 417, 708, , 712
ESP10, 404, 408, 414, 416, 417, 710, , 714
ESP10, 402, 406, 412, 414, 416, 712, , 716
ESP10, 404, 409, 413, 416, 417, 715, , 719
ESP10, 405, 409, 413, 415, 417, 717, , 721
ESP10, 405, 408, 412, 414, 416, 719, , 723
ESP10, 405, 408, 412, 414, 416, 722, , 726
ESP10, 404, 408, 411, 414, 415, 724, , 728
ESP10, 405, 409, 413, 415, 417, 726, , 730
ESP10, 404, 409, 412, 414, 416, 729, , 733
ESP10, 401, 406, 409, 411, 413, 731, , 735
ESP10, 402, 407, 410, 413, 415, 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/natural/GCDW1N_SQIN.ESPF10.csv
GCDW1N_SQIN.ESPF0.csv|2025-07-12
GCDW1N_SQIN.ESPF10.csv|2025-07-12
GCDW1N_SQIN.ESPFM.csv|2025-07-12
APR-SEP
COLUMBIA - GRAND COULEE DAM
(
GCDW1
)
Forecasts for Water Year
2026
Natural Forecast
ESP with 10 Days QPF
Ensemble:
2025-07-12
Issued:
2025-07-12
Hide Forecast
Forecast
Period
Forecasts Are in KAF
30 Year
Average
(1991-2020)
90 %
50 %
%
Average
10 %
APR-SEP
47138
58952
94
76187
62538
APR-JUL
37844
46585
89
59406
52578
APR-AUG
43617
54163
92
70457
58757
JAN-SEP
52564
65856
92
83669
71301
JAN-JUL
43449
54281
88
67960
61341
OCT-SEP
59209
73990
92
92560
80441
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/natural/GCDW1N_SQIN.ESPF10.csv
GCDW1N_SQIN.ESPF0.csv|2025-07-12
GCDW1N_SQIN.ESPF10.csv|2025-07-12
GCDW1N_SQIN.ESPFM.csv|2025-07-12
APR-SEP
Commerce Home
|
NOAA
|
NWS Organization
|
NWRFC Site Map
|
Search
Freedom of Information Act
|
Privacy Policy
|
Information Quality
|
USA.gov
|
Career Opportunities
#FFF68F
#33CCFF
#404040
#660066
#F00007
#66CCFF
ESP10,ESPM,ESP0
ESP10,ESPM,ESP0
Last Forecast
