Water Supply Forecast Listing

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Summary for Water Year (2026)

Ensemble Date: 2026-08-16 Issued Date: 2026-08-16

#	ID	Servicing WFO	Forecast Period	Name	90% Exceedence KAF	50% Exceedence KAF	% Normal	10% Exceedence KAF	30 Year Normal
1	WTLO3	PQR	APR-SEP	SOUTH SANTIAM - AT WATERLOO	295	296	50	310	590
2	WSRI1	BOI	APR-SEP	WEISER - NEAR WEISER	268	268	69	269	389
3	WODI1	PIH	APR-SEP	LITTLE WOOD - NEAR CAREY	38.85	39.15	51	39.79	76.59
4	WHBI1	MSO	APR-SEP	SALMON - AT WHITEBIRD	4855	4859	79	4867	6158
5	WGCM8	MSO	APR-SEP	MF FLATHEAD - NEAR WEST GLACIER	1660	1660	98	1662	1697
6	WEII1	BOI	APR-SEP	SNAKE - AT WEISER	4058	4074	68	4196	5956
7	WDHN2	LKN	APR-SEP	OWYHEE - WILDHORSE DAM	-3.95	-3.85	-24	-3.65	15.92
8	VIDO3	PQR	APR-SEP	MCKENZIE - NEAR VIDA	809	812	68	826	1195
9	UNYO3	PDT	APR-SEP	BURNT - Unity Dam & Burnt RVR NR Hereford	4.43	4.52	15	4.92	31.00
10	TRYO3	PDT	APR-SEP	GRANDE RONDE - TROY	650	651	49	654	1331
11	TOPI1	PIH	APR-SEP	PORTNEUF - AT TOPAZ	42.3	42.82	59	43.57	72.20
12	TONW1	OTX	APR-SEP	OKANOGAN - NEAR TONASKET	1048	1053	61	1071	1720
13	TEAI1	PIH	APR-SEP	TETON - NEAR ST. ANTHONY	279	281	63	285	447
14	TDAO3	PDT	APR-SEP	COLUMBIA - THE DALLES DAM	77464	77804	83	78566	94166
15	SWAI1	BOI	APR-SEP	SNAKE - BELOW SWAN FALLS	2003	2016	62	2115	3258
16	STHW1	OTX	APR-SEP	STEHEKIN - AT STEHEKIN	593	594	73	600	814
17	SRGM8	MSO	APR-SEP	CLARK FORK - AT ST REGIS	3355	3364	89	3377	3771
18	SPOW1	OTX	APR-SEP	SPOKANE - AT SPOKANE	1465	1466	57	1467	2587
19	SPDI1	OTX	APR-SEP	CLEARWATER - AT SPALDING	5496	5504	74	5520	7481
20	SMNI1	MSO	APR-SEP	SALMON - AT SALMON	737	740	80	746	929
21	SMKQ2	CAN	APR-SEP	SIMILKAMEEN - NEAR HEDLEY	697	701	70	707	1004
22	SLMO3	PQR	APR-SEP	WILLAMETTE - AT SALEM	2587	2608	55	2695	4754
23	SLCQ2	CAN	APR-SEP	SLOCAN - NEAR CRESCENT VALLEY	1743	1748	90	1791	1933
24	SKHI1	BOI	APR-SEP	SNAKE - AT KING HILL	2361	2376	70	2487	3412
25	SHYI1	PIH	APR-SEP	SNAKE - NEAR SHELLEY	3073	3094	63	3125	4905
26	SFLN2	PIH	APR-SEP	SALMON FALLS CREEK - NR SAN JACINTO	10.18	10.4	15	10.91	67.85
27	SERO3	PDT	APR-SEP	JOHN DAY - AT SERVICE CK	274	275	34	277	798
28	SALW4	RIW	APR-SEP	SALT - ABV PALISADES RES NR ETNA	163	165	45	168	368
29	RYGO3	MFR	APR-SEP	ROGUE - AT RAYGOLD	445	447	54	454	831
30	RISW1	OTX	APR-SEP	COLUMBIA - BLO ROCK ISLAND DAM	59658	59930	89	60595	67524
31	RIRI1	PIH	APR-SEP	WILLOW CREEK - NEAR RIRIE	6.38	6.48	11	6.88	60.33
32	RIMW1	PDT	APR-SEP	TIETON - AT TIETON DAM	141	143	64	146	225
33	REXI1	PIH	APR-SEP	HENRYS FORK - AT REXBURG	843	851	50	866	1710
34	REVQ2	CAN	APR-SEP	COLUMBIA - REVELSTOKE DAM	17847	18082	105	18364	17242
35	QBYQ2	CAN	APR-SEP	KOOTENAI - KOOTENAY L AT QUEENS BAY	15158	15195	96	15329	15842
36	PRTI1	OTX	APR-SEP	PRIEST - NEAR PRIEST RIVER	426	429	51	433	843
37	PRDW1	OTX	APR-SEP	COLUMBIA - BLO PRIEST RAPIDS DAM	60449	60721	89	61385	68162
38	PLNM8	MSO	APR-SEP	CLARK FORK - NEAR PLAINS	9871	9885	93	9910	10574
39	PESW1	OTX	APR-SEP	WENATCHEE - AT PESHASTIN	971	971	65	973	1496
40	PDTO3	PDT	APR-SEP	UMATILLA - AT PENDLETON	105	105	66	105	158
41	PATW1	OTX	APR-SEP	METHOW - NEAR PATEROS	827	827	86	828	965
42	PARW1	PDT	APR-SEP	YAKIMA - NEAR PARKER	968	971	51	983	1899
43	PARI1	BOI	APR-SEP	BOISE - NEAR PARMA	406	408	70	410	584
44	PALI1	PIH	APR-SEP	SNAKE - NEAR IRWIN	2607	2614	73	2635	3577
45	OWYO3	BOI	APR-SEP	OWYHEE - OWYHEE DAM	73.95	75.32	22	78.21	336
46	ORFI1	MSO	APR-SEP	CLEARWATER - AT OROFINO	3489	3494	75	3505	4632
47	NITW1	OTX	APR-SEP	SIMILKAMEEN - NEAR NIGHTHAWK	983	987	72	994	1366
48	NACW1	PDT	APR-SEP	NACHES - NEAR NACHES	490	492	61	495	807
49	MYDW1	PQR	APR-SEP	COWLITZ - MAYFIELD RESERVOIR	1102	1113	60	1138	1864
50	MONO3	PDT	APR-SEP	NF JOHN DAY - AT MONUMENT	209	210	37	211	564
51	MODO3	PDT	APR-SEP	DESCHUTES - AT MOODY NR BIGGS	1436	1437	76	1437	1902
52	MEWW1	PQR	APR-SEP	LEWIS - MERWIN DAM	606	611	56	634	1082
53	MEHO3	PQR	APR-SEP	NORTH SANTIAM - AT MEHAMA	429	433	51	447	855
54	MCDW1	PDT	APR-SEP	COLUMBIA - MCNARY DAM	75412	75751	82	76511	92790
55	MCDQ2	CAN	APR-SEP	COLUMBIA - MICA DAM	12786	12998	106	13203	12296
56	MAGI1	PIH	APR-SEP	BIG WOOD - MAGIC DAM	92.32	92.72	39	94.78	240
57	MADO3	BOI	APR-SEP	MALHEUR - NEAR DREWSEY	12.62	12.63	19	12.87	64.84
58	MACI1	PIH	APR-SEP	BIG LOST - MACKAY RESERVOIR NEAR MACKAY	99.17	99.47	73	100	136
59	LYDM8	MSO	APR-SEP	KOOTENAI - LIBBY DAM	6744	6773	105	6875	6429
60	LUCI1	BOI	APR-SEP	BOISE - LUCKY PEAK DAM	812	813	61	818	1329
61	LSTO3	PDT	APR-SEP	LOSTINE - NR LOSTINE	66.95	67.12	58	68.92	116
62	LLKW1	OTX	APR-SEP	SPOKANE - AT LONGLAKE	1677	1678	58	1680	2901
63	LGNO3	PDT	APR-SEP	GRANDE RONDE - NEAR PERRY	51.16	51.33	29	51.77	176
64	LGDW1	OTX	APR-SEP	SNAKE - LOWER GRANITE DAM	15605	15636	70	15778	22232
65	LEOI1	OTX	APR-SEP	KOOTENAI - AT LEONIA	7661	7690	99	7800	7803
66	LAUW1	OTX	APR-SEP	KETTLE - AT LAURIER	1029	1032	53	1048	1954
67	KIOW1	PDT	APR-SEP	YAKIMA - AT KIONA	670	672	59	682	1149
68	KERM8	MSO	APR-SEP	FLATHEAD - SELI’Š KSANKA QLISPE’ DAM	6100	6102	93	6114	6577
69	KEEW1	PDT	APR-SEP	YAKIMA - NEAR MARTIN	78.81	79.31	61	83.49	129
70	KACW1	PDT	APR-SEP	KACHESS - NEAR EASTON	51.03	51.13	45	52.65	114
71	JLKW4	RIW	APR-SEP	SNAKE - JACKSON LAKE AT DAM	629	630	74	634	849
72	JDAO3	PDT	APR-SEP	COLUMBIA - JOHN DAY DAM	77100	77439	84	78202	92354
73	IMNO3	PDT	APR-SEP	IMNAHA - AT IMNAHA	133	133	48	133	277
74	HWRI1	PIH	APR-SEP	BIG LOST - AT HOWELL RANCH NEAR CHILLY	142	142	83	143	172
75	HRSI1	BOI	APR-SEP	PAYETTE - NEAR HORSESHOE BEND	1194	1198	75	1209	1597
76	HOTI1	BOI	APR-SEP	BRUNEAU - NEAR HOT SPRINGS	32.63	33.04	18	34.01	183
77	HLKW1	PDT	APR-SEP	YAKIMA - NEAR HORLICK	487	488	51	496	962
78	HHWM8	MSO	APR-SEP	SF FLATHEAD - HUNGRY HORSE DAM	1939	1940	93	1944	2088
79	HEII1	PIH	APR-SEP	SNAKE - NEAR HEISE	2734	2741	71	2762	3849
80	HCDI1	PDT	APR-SEP	SNAKE - AT HELLS CANYON DAM	4336	4353	65	4474	6725
81	HALI1	PIH	APR-SEP	BIG WOOD - AT HAILEY	176	177	69	178	257
82	GREW4	RIW	APR-SEP	GREYS - AB RES NR ALPINE	230	231	62	232	371
83	GIBO3	PDT	APR-SEP	UMATILLA - NEAR GIBBON	53.98	54.03	66	54.16	82.43
84	GCDW1	OTX	APR-SEP	COLUMBIA - GRAND COULEE DAM	55649	55925	91	56566	61483
85	FCFM8	MSO	APR-SEP	NF FLATHEAD - NEAR COLUMBIA FALLS	1685	1685	96	1686	1750
86	ESTO3	PQR	APR-SEP	CLACKAMAS - AT ESTACADA	388	392	53	400	733
87	ENVI1	OTX	APR-SEP	NF COEUR D ALENE - AT ENAVILLE	373	373	50	374	743
88	EMMI1	BOI	APR-SEP	PAYETTE - NEAR EMMETT	1189	1191	90	1196	1325
89	EGCO3	BOI	APR-SEP	EAGLE CREEK - ABOVE SKULL CK	93.65	93.66	54	93.71	174
90	EASI1	OTX	APR-SEP	MOYIE - AT EASTPORT	310	310	79	311	395
91	DWRI1	MSO	APR-SEP	NF CLEARWATER - DWORSHAK DAM	1928	1932	74	1936	2620
92	DRSW1	SEW	APR-SEP	DUNGENESS - NEAR SEQUIM	66.59	66.93	46	69.11	145
93	DRBI1	BOI	APR-SEP	DEADWOOD - BELOW DEADWOOD RES	102	102	76	103	135
94	DONO3	BOI	APR-SEP	DONNER UND BLITZEN - NR FRENCHGLEN	25.68	25.72	41	25.97	62.51
95	DCDQ2	CAN	APR-SEP	DUNCAN - DUNCAN DAM	2329	2357	106	2384	2224
96	DARM8	MSO	APR-SEP	BITTERROOT - NEAR DARBY	472	474	91	476	519
97	CSCI1	BOI	APR-SEP	NF PAYETTE - CASCADE DAM	332	334	69	341	487
98	CONW1	SEW	APR-SEP	SKAGIT - NEAR CONCRETE	4008	4056	68	4202	5955
99	COEI1	OTX	APR-SEP	COEUR D ALENE - COEUR D ALENE LAKE	1376	1377	55	1378	2504
100	CLEW1	PDT	APR-SEP	CLE ELUM - NEAR ROSLYN	182	182	44	188	419
101	CLDI1	OTX	APR-SEP	ST JOE - AT CALDER	789	790	69	791	1138
102	CIBW1	OTX	APR-SEP	COLUMBIA - AT INTL BOUNDARY	53516	53791	94	54403	56951
103	CHEI1	PIH	APR-SEP	FALL RIVER - NEAR CHESTER	189	192	51	196	377
104	CHDW1	OTX	APR-SEP	CHELAN - LAKE CHELAN DAM	837	838	74	845	1139
105	CFMM8	MSO	APR-SEP	FLATHEAD - AT COLUMBIA FALLS	5251	5251	93	5259	5634
106	CASW1	PQR	APR-SEP	COWLITZ - AT CASTLE ROCK	1587	1602	64	1640	2504
107	CABI1	OTX	APR-SEP	CLARK FORK - CABINET GORGE DAM	10305	10320	89	10349	11639
108	BUSO3	BOI	APR-SEP	SILVIES - NEAR BURNS	14.44	14.56	20	14.86	71.47
109	BUMW1	PDT	APR-SEP	BUMPING - BELOW BUMPING DAM	70.61	70.71	57	70.99	125
110	BRNI1	BOI	APR-SEP	SNAKE - BROWNLEE DAM	4227	4245	66	4365	6398
111	BONO3	PQR	APR-SEP	COLUMBIA - BONNEVILLE DAM	76234	76573	80	77336	95202
112	BONM8	MSO	APR-SEP	BLACKFOOT - NEAR BONNER	889	889	100	890	891
113	BITM8	MSO	APR-SEP	BITTERROOT - NEAR MISSOULA	1194	1196	93	1203	1289
114	BIRQ2	CAN	APR-SEP	COLUMBIA - AT BIRCHBANK	41459	41739	98	42313	42578
115	BFEI1	OTX	APR-SEP	KOOTENAI - AT BONNERS FERRY	8274	8304	98	8414	8463
116	BEUO3	BOI	APR-SEP	NF MALHEUR - AT BEULAH	16.8	16.8	28	16.8	59.29
117	BELM8	MSO	APR-SEP	CLARK FORK - BELOW MISSOULA	2556	2565	89	2577	2893
118	ARDQ2	OTX	APR-SEP	COLUMBIA - ARROW LAKES (HUGH KEENLEYSIDE DAM)	24080	24342	101	24709	24059
119	ARAI1	BOI	APR-SEP	SF BOISE - ANDERSON RANCH DAM	309	310	63	312	495
120	ANTI1	PIH	APR-SEP	HENRYS FORK - AT ST. ANTHONY	386	395	50	407	794
121	AMFI1	PIH	APR-SEP	SNAKE - AT AMERICAN FALLS DAM	714	736	28	767	2624
122	ALFW1	OTX	APR-SEP	PEND OREILLE - ALBENI FALLS DAM	11342	11363	85	11433	13347
123	ABOM8	MSO	APR-SEP	CLARK FORK - ABOVE MISSOULA	1414	1419	90	1428	1571
124	ABBM8	MSO	APR-SEP	CLARK FORK - ABOVE BLACKFOOT	525	530	78	537	680

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