Water Supply Forecast Listing

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Summary for Water Year (2026)

Ensemble Date: 2026-07-20 Issued Date: 2026-07-20

#	ID	Servicing WFO	Forecast Period	Name	90% Exceedence KAF	50% Exceedence KAF	% Normal	10% Exceedence KAF	30 Year Normal
1	ABBM8	MSO	APR-SEP	CLARK FORK - ABOVE BLACKFOOT	528	537	79	551	680
2	ABOM8	MSO	APR-SEP	CLARK FORK - ABOVE MISSOULA	1407	1418	90	1434	1571
3	ALFW1	OTX	APR-SEP	PEND OREILLE - ALBENI FALLS DAM	11516	11553	87	11643	13347
4	AMFI1	PIH	APR-SEP	SNAKE - AT AMERICAN FALLS DAM	677	698	27	729	2624
5	ANTI1	PIH	APR-SEP	HENRYS FORK - AT ST. ANTHONY	350	361	45	376	794
6	ARAI1	BOI	APR-SEP	SF BOISE - ANDERSON RANCH DAM	306	307	62	311	495
7	ARDQ2	OTX	APR-SEP	COLUMBIA - ARROW LAKES (HUGH KEENLEYSIDE DAM)	23767	24263	101	25034	24059
8	BELM8	MSO	APR-SEP	CLARK FORK - BELOW MISSOULA	2574	2587	89	2608	2893
9	BEUO3	BOI	APR-SEP	NF MALHEUR - AT BEULAH	16.13	16.13	27	16.15	59.29
10	BFEI1	OTX	APR-SEP	KOOTENAI - AT BONNERS FERRY	8358	8436	100	8600	8463
11	BIRQ2	CAN	APR-SEP	COLUMBIA - AT BIRCHBANK	41223	41822	98	42888	42578
12	BITM8	MSO	APR-SEP	BITTERROOT - NEAR MISSOULA	1218	1221	95	1228	1289
13	BONM8	MSO	APR-SEP	BLACKFOOT - NEAR BONNER	879	881	99	883	891
14	BONO3	PQR	APR-SEP	COLUMBIA - BONNEVILLE DAM	76985	77625	82	79063	95202
15	BRNI1	BOI	APR-SEP	SNAKE - BROWNLEE DAM	4284	4330	68	4492	6398
16	BUMW1	PDT	APR-SEP	BUMPING - BELOW BUMPING DAM	70.12	70.32	56	70.6	125
17	BUSO3	BOI	APR-SEP	SILVIES - NEAR BURNS	12.95	13.13	18	13.76	71.47
18	CABI1	OTX	APR-SEP	CLARK FORK - CABINET GORGE DAM	10583	10617	91	10680	11639
19	CASW1	PQR	APR-SEP	COWLITZ - AT CASTLE ROCK	1599	1619	65	1655	2504
20	CFMM8	MSO	APR-SEP	FLATHEAD - AT COLUMBIA FALLS	5343	5347	95	5381	5634
21	CHDW1	OTX	APR-SEP	CHELAN - LAKE CHELAN DAM	839	841	74	851	1139
22	CHEI1	PIH	APR-SEP	FALL RIVER - NEAR CHESTER	175	178	47	186	377
23	CIBW1	OTX	APR-SEP	COLUMBIA - AT INTL BOUNDARY	53561	54114	95	55250	56951
24	CLDI1	OTX	APR-SEP	ST JOE - AT CALDER	792	793	70	795	1138
25	CLEW1	PDT	APR-SEP	CLE ELUM - NEAR ROSLYN	178	178	43	184	419
26	COEI1	OTX	APR-SEP	COEUR D ALENE - COEUR D ALENE LAKE	1400	1401	56	1404	2504
27	CONW1	SEW	APR-SEP	SKAGIT - NEAR CONCRETE	4185	4277	72	4485	5955
28	CSCI1	BOI	APR-SEP	NF PAYETTE - CASCADE DAM	345	350	72	362	487
29	DARM8	MSO	APR-SEP	BITTERROOT - NEAR DARBY	488	491	95	496	519
30	DCDQ2	CAN	APR-SEP	DUNCAN - DUNCAN DAM	2314	2368	106	2412	2224
31	DONO3	BOI	APR-SEP	DONNER UND BLITZEN - NR FRENCHGLEN	25.85	25.98	42	26.58	62.51
32	DRBI1	BOI	APR-SEP	DEADWOOD - BELOW DEADWOOD RES	101	102	75	103	135
33	DRSW1	SEW	APR-SEP	DUNGENESS - NEAR SEQUIM	66.62	67.07	46	69.25	145
34	DWRI1	MSO	APR-SEP	NF CLEARWATER - DWORSHAK DAM	1939	1943	74	1954	2620
35	EASI1	OTX	APR-SEP	MOYIE - AT EASTPORT	312	312	79	313	395
36	EGCO3	BOI	APR-SEP	EAGLE CREEK - ABOVE SKULL CK	93.73	93.77	54	93.86	174
37	EMMI1	BOI	APR-SEP	PAYETTE - NEAR EMMETT	1198	1201	91	1207	1325
38	ENVI1	OTX	APR-SEP	NF COEUR D ALENE - AT ENAVILLE	384	384	52	385	743
39	ESTO3	PQR	APR-SEP	CLACKAMAS - AT ESTACADA	389	393	54	403	733
40	FCFM8	MSO	APR-SEP	NF FLATHEAD - NEAR COLUMBIA FALLS	1713	1713	98	1721	1750
41	GCDW1	OTX	APR-SEP	COLUMBIA - GRAND COULEE DAM	55784	56349	92	57508	61483
42	GIBO3	PDT	APR-SEP	UMATILLA - NEAR GIBBON	53.83	53.92	65	54.03	82.43
43	GREW4	RIW	APR-SEP	GREYS - AB RES NR ALPINE	234	234	63	236	371
44	HALI1	PIH	APR-SEP	BIG WOOD - AT HAILEY	183	184	71	185	257
45	HCDI1	PDT	APR-SEP	SNAKE - AT HELLS CANYON DAM	4376	4422	66	4584	6725
46	HEII1	PIH	APR-SEP	SNAKE - NEAR HEISE	2671	2686	70	2707	3849
47	HHWM8	MSO	APR-SEP	SF FLATHEAD - HUNGRY HORSE DAM	1954	1959	94	1975	2088
48	HLKW1	PDT	APR-SEP	YAKIMA - NEAR HORLICK	484	485	50	494	962
49	HOTI1	BOI	APR-SEP	BRUNEAU - NEAR HOT SPRINGS	31.85	32.66	18	33.89	183
50	HRSI1	BOI	APR-SEP	PAYETTE - NEAR HORSESHOE BEND	1206	1213	76	1231	1597
51	HWRI1	PIH	APR-SEP	BIG LOST - AT HOWELL RANCH NEAR CHILLY	145	146	85	146	172
52	IMNO3	PDT	APR-SEP	IMNAHA - AT IMNAHA	137	137	49	137	277
53	JDAO3	PDT	APR-SEP	COLUMBIA - JOHN DAY DAM	77540	78185	85	79629	92354
54	JLKW4	RIW	APR-SEP	SNAKE - JACKSON LAKE AT DAM	626	628	74	632	849
55	KACW1	PDT	APR-SEP	KACHESS - NEAR EASTON	49.89	50.13	44	51.83	114
56	KEEW1	PDT	APR-SEP	YAKIMA - NEAR MARTIN	69.69	70.26	54	74.76	129
57	KERM8	MSO	APR-SEP	FLATHEAD - SELI’Š KSANKA QLISPE’ DAM	6203	6213	94	6254	6577
58	KIOW1	PDT	APR-SEP	YAKIMA - AT KIONA	730	734	64	742	1149
59	LAUW1	OTX	APR-SEP	KETTLE - AT LAURIER	1025	1034	53	1063	1954
60	LEOI1	OTX	APR-SEP	KOOTENAI - AT LEONIA	7742	7819	100	7982	7803
61	LGDW1	OTX	APR-SEP	SNAKE - LOWER GRANITE DAM	15794	15862	71	16046	22232
62	LGNO3	PDT	APR-SEP	GRANDE RONDE - NEAR PERRY	51.25	51.61	29	52.68	176
63	LLKW1	OTX	APR-SEP	SPOKANE - AT LONGLAKE	1719	1720	59	1723	2901
64	LSTO3	PDT	APR-SEP	LOSTINE - NR LOSTINE	66.44	66.89	58	71.04	116
65	LUCI1	BOI	APR-SEP	BOISE - LUCKY PEAK DAM	815	818	62	825	1329
66	LYDM8	MSO	APR-SEP	KOOTENAI - LIBBY DAM	6818	6896	107	7050	6429
67	MACI1	PIH	APR-SEP	BIG LOST - MACKAY RESERVOIR NEAR MACKAY	102	103	76	104	136
68	MADO3	BOI	APR-SEP	MALHEUR - NEAR DREWSEY	12.56	12.59	19	12.82	64.84
69	MAGI1	PIH	APR-SEP	BIG WOOD - MAGIC DAM	77.41	78.97	33	82.75	240
70	MCDQ2	CAN	APR-SEP	COLUMBIA - MICA DAM	12598	12926	105	13283	12296
71	MCDW1	PDT	APR-SEP	COLUMBIA - MCNARY DAM	76002	76647	83	78087	92790
72	MEHO3	PQR	APR-SEP	NORTH SANTIAM - AT MEHAMA	429	434	51	452	855
73	MEWW1	PQR	APR-SEP	LEWIS - MERWIN DAM	607	615	57	645	1082
74	MODO3	PDT	APR-SEP	DESCHUTES - AT MOODY NR BIGGS	1444	1444	76	1445	1902
75	MONO3	PDT	APR-SEP	NF JOHN DAY - AT MONUMENT	210	211	37	213	564
76	MYDW1	PQR	APR-SEP	COWLITZ - MAYFIELD RESERVOIR	1106	1122	60	1144	1864
77	NACW1	PDT	APR-SEP	NACHES - NEAR NACHES	491	495	61	501	807
78	NITW1	OTX	APR-SEP	SIMILKAMEEN - NEAR NIGHTHAWK	955	962	70	971	1366
79	ORFI1	MSO	APR-SEP	CLEARWATER - AT OROFINO	3512	3522	76	3536	4632
80	OWYO3	BOI	APR-SEP	OWYHEE - OWYHEE DAM	75.04	77.36	23	81	336
81	PALI1	PIH	APR-SEP	SNAKE - NEAR IRWIN	2596	2610	73	2631	3577
82	PARI1	BOI	APR-SEP	BOISE - NEAR PARMA	415	419	72	422	584
83	PARW1	PDT	APR-SEP	YAKIMA - NEAR PARKER	981	986	52	996	1899
84	PATW1	OTX	APR-SEP	METHOW - NEAR PATEROS	830	831	86	832	965
85	PDTO3	PDT	APR-SEP	UMATILLA - AT PENDLETON	104	104	66	104	158
86	PESW1	OTX	APR-SEP	WENATCHEE - AT PESHASTIN	982	983	66	986	1496
87	PLNM8	MSO	APR-SEP	CLARK FORK - NEAR PLAINS	10056	10085	95	10143	10574
88	PRDW1	OTX	APR-SEP	COLUMBIA - BLO PRIEST RAPIDS DAM	60641	61227	90	62388	68162
89	PRTI1	OTX	APR-SEP	PRIEST - NEAR PRIEST RIVER	431	437	52	447	843
90	QBYQ2	CAN	APR-SEP	KOOTENAI - KOOTENAY L AT QUEENS BAY	15286	15365	97	15611	15842
91	REVQ2	CAN	APR-SEP	COLUMBIA - REVELSTOKE DAM	17555	17927	104	18513	17242
92	REXI1	PIH	APR-SEP	HENRYS FORK - AT REXBURG	797	811	47	823	1710
93	RIMW1	PDT	APR-SEP	TIETON - AT TIETON DAM	146	149	66	154	225
94	RIRI1	PIH	APR-SEP	WILLOW CREEK - NEAR RIRIE	6.83	6.93	11	7.23	60.33
95	RISW1	OTX	APR-SEP	COLUMBIA - BLO ROCK ISLAND DAM	59879	60465	90	61627	67524
96	RYGO3	MFR	APR-SEP	ROGUE - AT RAYGOLD	450	452	54	459	831
97	SALW4	RIW	APR-SEP	SALT - ABV PALISADES RES NR ETNA	161	165	45	171	368
98	SERO3	PDT	APR-SEP	JOHN DAY - AT SERVICE CK	272	273	34	275	798
99	SFLN2	PIH	APR-SEP	SALMON FALLS CREEK - NR SAN JACINTO	9.41	9.7	14	10.17	67.85
100	SHYI1	PIH	APR-SEP	SNAKE - NEAR SHELLEY	2964	2985	61	3019	4905
101	SKHI1	BOI	APR-SEP	SNAKE - AT KING HILL	2277	2333	68	2471	3412
102	SLCQ2	CAN	APR-SEP	SLOCAN - NEAR CRESCENT VALLEY	1720	1745	90	1884	1933
103	SLMO3	PQR	APR-SEP	WILLAMETTE - AT SALEM	2527	2559	54	2670	4754
104	SMKQ2	CAN	APR-SEP	SIMILKAMEEN - NEAR HEDLEY	696	704	70	713	1004
105	SMNI1	MSO	APR-SEP	SALMON - AT SALMON	732	738	79	750	929
106	SPDI1	OTX	APR-SEP	CLEARWATER - AT SPALDING	5527	5542	74	5562	7481
107	SPOW1	OTX	APR-SEP	SPOKANE - AT SPOKANE	1501	1503	58	1506	2587
108	SRGM8	MSO	APR-SEP	CLARK FORK - AT ST REGIS	3377	3391	90	3412	3771
109	STHW1	OTX	APR-SEP	STEHEKIN - AT STEHEKIN	604	607	75	614	814
110	SWAI1	BOI	APR-SEP	SNAKE - BELOW SWAN FALLS	1979	2027	62	2152	3258
111	TDAO3	PDT	APR-SEP	COLUMBIA - THE DALLES DAM	77807	78452	83	79896	94166
112	TEAI1	PIH	APR-SEP	TETON - NEAR ST. ANTHONY	280	284	63	290	447
113	TONW1	OTX	APR-SEP	OKANOGAN - NEAR TONASKET	1020	1029	60	1054	1720
114	TOPI1	PIH	APR-SEP	PORTNEUF - AT TOPAZ	42.96	43.84	61	45.16	72.20
115	TRYO3	PDT	APR-SEP	GRANDE RONDE - TROY	650	652	49	656	1331
116	UNYO3	PDT	APR-SEP	BURNT - Unity Dam & Burnt RVR NR Hereford	3.54	3.74	12	4.08	31.00
117	VIDO3	PQR	APR-SEP	MCKENZIE - NEAR VIDA	810	814	68	828	1195
118	WDHN2	LKN	APR-SEP	OWYHEE - WILDHORSE DAM	-3.1	-3	-19	-2.7	15.92
119	WEII1	BOI	APR-SEP	SNAKE - AT WEISER	4108	4152	70	4315	5956
120	WGCM8	MSO	APR-SEP	MF FLATHEAD - NEAR WEST GLACIER	1683	1683	99	1695	1697
121	WHBI1	MSO	APR-SEP	SALMON - AT WHITEBIRD	4923	4930	80	4946	6158
122	WODI1	PIH	APR-SEP	LITTLE WOOD - NEAR CAREY	38.75	39.15	51	39.95	76.59
123	WSRI1	BOI	APR-SEP	WEISER - NEAR WEISER	270	271	70	272	389
124	WTLO3	PQR	APR-SEP	SOUTH SANTIAM - AT WATERLOO	297	300	51	316	590

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