Water Supply Forecast Listing

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Summary for Water Year (2026)

Ensemble Date: 2026-06-24 Issued Date: 2026-06-24

#	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	450	459	67	482	680
2	ABOM8	MSO	APR-SEP	CLARK FORK - ABOVE MISSOULA	1302	1315	84	1347	1571
3	ALFW1	OTX	APR-SEP	PEND OREILLE - ALBENI FALLS DAM	10970	11015	83	11263	13347
4	AMFI1	PIH	APR-SEP	SNAKE - AT AMERICAN FALLS DAM	508	516	20	543	2624
5	ANTI1	PIH	APR-SEP	HENRYS FORK - AT ST. ANTHONY	273	283	36	305	794
6	ARAI1	BOI	APR-SEP	SF BOISE - ANDERSON RANCH DAM	294	296	60	300	495
7	ARDQ2	OTX	APR-SEP	COLUMBIA - ARROW LAKES (HUGH KEENLEYSIDE DAM)	24309	25133	104	26780	24059
8	BELM8	MSO	APR-SEP	CLARK FORK - BELOW MISSOULA	2388	2403	83	2448	2893
9	BEUO3	BOI	APR-SEP	NF MALHEUR - AT BEULAH	16.1	16.1	27	16.1	59.29
10	BFEI1	OTX	APR-SEP	KOOTENAI - AT BONNERS FERRY	8270	8429	100	8790	8463
11	BIRQ2	CAN	APR-SEP	COLUMBIA - AT BIRCHBANK	41756	43058	101	45066	42578
12	BITM8	MSO	APR-SEP	BITTERROOT - NEAR MISSOULA	1133	1137	88	1149	1289
13	BONM8	MSO	APR-SEP	BLACKFOOT - NEAR BONNER	853	856	96	864	891
14	BONO3	PQR	APR-SEP	COLUMBIA - BONNEVILLE DAM	77034	78678	83	80829	95202
15	BRNI1	BOI	APR-SEP	SNAKE - BROWNLEE DAM	4436	4482	70	4666	6398
16	BUMW1	PDT	APR-SEP	BUMPING - BELOW BUMPING DAM	69.74	69.94	56	70.48	125
17	BUSO3	BOI	APR-SEP	SILVIES - NEAR BURNS	12.04	12.04	17	12.04	71.47
18	CABI1	OTX	APR-SEP	CLARK FORK - CABINET GORGE DAM	10032	10067	86	10276	11639
19	CASW1	PQR	APR-SEP	COWLITZ - AT CASTLE ROCK	1625	1640	65	1677	2504
20	CFMM8	MSO	APR-SEP	FLATHEAD - AT COLUMBIA FALLS	5004	5018	89	5134	5634
21	CHDW1	OTX	APR-SEP	CHELAN - LAKE CHELAN DAM	802	809	71	821	1139
22	CHEI1	PIH	APR-SEP	FALL RIVER - NEAR CHESTER	156	158	42	165	377
23	CIBW1	OTX	APR-SEP	COLUMBIA - AT INTL BOUNDARY	53453	54940	96	57060	56951
24	CLDI1	OTX	APR-SEP	ST JOE - AT CALDER	788	789	69	793	1138
25	CLEW1	PDT	APR-SEP	CLE ELUM - NEAR ROSLYN	173	174	41	183	419
26	COEI1	OTX	APR-SEP	COEUR D ALENE - COEUR D ALENE LAKE	1402	1403	56	1412	2504
27	CONW1	SEW	APR-SEP	SKAGIT - NEAR CONCRETE	4204	4298	72	4589	5955
28	CSCI1	BOI	APR-SEP	NF PAYETTE - CASCADE DAM	341	346	71	358	487
29	DARM8	MSO	APR-SEP	BITTERROOT - NEAR DARBY	458	462	89	470	519
30	DCDQ2	CAN	APR-SEP	DUNCAN - DUNCAN DAM	2301	2390	107	2498	2224
31	DONO3	BOI	APR-SEP	DONNER UND BLITZEN - NR FRENCHGLEN	25.97	26.1	42	26.65	62.51
32	DRBI1	BOI	APR-SEP	DEADWOOD - BELOW DEADWOOD RES	98.36	98.76	73	100	135
33	DRSW1	SEW	APR-SEP	DUNGENESS - NEAR SEQUIM	67.65	68.57	47	70.64	145
34	DWRI1	MSO	APR-SEP	NF CLEARWATER - DWORSHAK DAM	1926	1930	74	1946	2620
35	EASI1	OTX	APR-SEP	MOYIE - AT EASTPORT	319	321	81	322	395
36	EGCO3	BOI	APR-SEP	EAGLE CREEK - ABOVE SKULL CK	98.04	98.07	56	98.19	174
37	EMMI1	BOI	APR-SEP	PAYETTE - NEAR EMMETT	1177	1181	89	1189	1325
38	ENVI1	OTX	APR-SEP	NF COEUR D ALENE - AT ENAVILLE	379	379	51	382	743
39	ESTO3	PQR	APR-SEP	CLACKAMAS - AT ESTACADA	382	388	53	399	733
40	FCFM8	MSO	APR-SEP	NF FLATHEAD - NEAR COLUMBIA FALLS	1610	1611	92	1642	1750
41	GCDW1	OTX	APR-SEP	COLUMBIA - GRAND COULEE DAM	55770	57275	93	59435	61483
42	GIBO3	PDT	APR-SEP	UMATILLA - NEAR GIBBON	54.16	54.23	66	54.39	82.43
43	GREW4	RIW	APR-SEP	GREYS - AB RES NR ALPINE	231	231	62	233	371
44	HALI1	PIH	APR-SEP	BIG WOOD - AT HAILEY	182	182	71	184	257
45	HCDI1	PDT	APR-SEP	SNAKE - AT HELLS CANYON DAM	4518	4564	68	4748	6725
46	HEII1	PIH	APR-SEP	SNAKE - NEAR HEISE	2560	2574	67	2611	3849
47	HHWM8	MSO	APR-SEP	SF FLATHEAD - HUNGRY HORSE DAM	1851	1858	89	1893	2088
48	HLKW1	PDT	APR-SEP	YAKIMA - NEAR HORLICK	477	478	50	492	962
49	HOTI1	BOI	APR-SEP	BRUNEAU - NEAR HOT SPRINGS	30.61	31.5	17	33.38	183
50	HRSI1	BOI	APR-SEP	PAYETTE - NEAR HORSESHOE BEND	1178	1186	74	1206	1597
51	HWRI1	PIH	APR-SEP	BIG LOST - AT HOWELL RANCH NEAR CHILLY	143	144	84	145	172
52	IMNO3	PDT	APR-SEP	IMNAHA - AT IMNAHA	137	137	50	138	277
53	JDAO3	PDT	APR-SEP	COLUMBIA - JOHN DAY DAM	77198	78850	85	81003	92354
54	JLKW4	RIW	APR-SEP	SNAKE - JACKSON LAKE AT DAM	594	596	70	602	849
55	KACW1	PDT	APR-SEP	KACHESS - NEAR EASTON	48.12	48.32	42	50.74	114
56	KEEW1	PDT	APR-SEP	YAKIMA - NEAR MARTIN	60.88	61.61	48	66.75	129
57	KERM8	MSO	APR-SEP	FLATHEAD - SELI’Š KSANKA QLISPE’ DAM	5769	5786	88	5930	6577
58	KIOW1	PDT	APR-SEP	YAKIMA - AT KIONA	717	720	63	730	1149
59	LAUW1	OTX	APR-SEP	KETTLE - AT LAURIER	1003	1019	52	1086	1954
60	LEOI1	OTX	APR-SEP	KOOTENAI - AT LEONIA	7634	7791	100	8150	7803
61	LGDW1	OTX	APR-SEP	SNAKE - LOWER GRANITE DAM	15589	15667	70	15902	22232
62	LGNO3	PDT	APR-SEP	GRANDE RONDE - NEAR PERRY	50.89	51.25	29	52.41	176
63	LLKW1	OTX	APR-SEP	SPOKANE - AT LONGLAKE	1730	1732	60	1743	2901
64	LSTO3	PDT	APR-SEP	LOSTINE - NR LOSTINE	63.4	64.11	55	68.47	116
65	LUCI1	BOI	APR-SEP	BOISE - LUCKY PEAK DAM	804	808	61	817	1329
66	LYDM8	MSO	APR-SEP	KOOTENAI - LIBBY DAM	6725	6878	107	7239	6429
67	MACI1	PIH	APR-SEP	BIG LOST - MACKAY RESERVOIR NEAR MACKAY	108	109	80	110	136
68	MADO3	BOI	APR-SEP	MALHEUR - NEAR DREWSEY	11.91	11.96	18	12.18	64.84
69	MAGI1	PIH	APR-SEP	BIG WOOD - MAGIC DAM	77.09	79.02	33	83.47	240
70	MCDQ2	CAN	APR-SEP	COLUMBIA - MICA DAM	12954	13401	109	14320	12296
71	MCDW1	PDT	APR-SEP	COLUMBIA - MCNARY DAM	75741	77393	83	79547	92790
72	MEHO3	PQR	APR-SEP	NORTH SANTIAM - AT MEHAMA	432	439	51	462	855
73	MEWW1	PQR	APR-SEP	LEWIS - MERWIN DAM	597	605	56	637	1082
74	MODO3	PDT	APR-SEP	DESCHUTES - AT MOODY NR BIGGS	1460	1460	77	1461	1902
75	MONO3	PDT	APR-SEP	NF JOHN DAY - AT MONUMENT	204	205	36	208	564
76	MYDW1	PQR	APR-SEP	COWLITZ - MAYFIELD RESERVOIR	1126	1138	61	1159	1864
77	NACW1	PDT	APR-SEP	NACHES - NEAR NACHES	492	497	62	503	807
78	NITW1	OTX	APR-SEP	SIMILKAMEEN - NEAR NIGHTHAWK	927	937	69	950	1366
79	ORFI1	MSO	APR-SEP	CLEARWATER - AT OROFINO	3342	3357	72	3387	4632
80	OWYO3	BOI	APR-SEP	OWYHEE - OWYHEE DAM	49.33	51.67	15	54.98	336
81	PALI1	PIH	APR-SEP	SNAKE - NEAR IRWIN	2463	2476	69	2513	3577
82	PARI1	BOI	APR-SEP	BOISE - NEAR PARMA	413	421	72	428	584
83	PARW1	PDT	APR-SEP	YAKIMA - NEAR PARKER	1043	1049	55	1063	1899
84	PATW1	OTX	APR-SEP	METHOW - NEAR PATEROS	825	826	86	828	965
85	PDTO3	PDT	APR-SEP	UMATILLA - AT PENDLETON	103	103	65	103	158
86	PESW1	OTX	APR-SEP	WENATCHEE - AT PESHASTIN	982	983	66	991	1496
87	PLNM8	MSO	APR-SEP	CLARK FORK - NEAR PLAINS	9424	9456	89	9643	10574
88	PRDW1	OTX	APR-SEP	COLUMBIA - BLO PRIEST RAPIDS DAM	60512	62021	91	64194	68162
89	PRTI1	OTX	APR-SEP	PRIEST - NEAR PRIEST RIVER	421	428	51	444	843
90	QBYQ2	CAN	APR-SEP	KOOTENAI - KOOTENAY L AT QUEENS BAY	15323	15641	99	16271	15842
91	REVQ2	CAN	APR-SEP	COLUMBIA - REVELSTOKE DAM	17890	18546	108	19904	17242
92	REXI1	PIH	APR-SEP	HENRYS FORK - AT REXBURG	745	758	44	783	1710
93	RIMW1	PDT	APR-SEP	TIETON - AT TIETON DAM	147	152	67	157	225
94	RIRI1	PIH	APR-SEP	WILLOW CREEK - NEAR RIRIE	6.86	7.06	12	7.36	60.33
95	RISW1	OTX	APR-SEP	COLUMBIA - BLO ROCK ISLAND DAM	59908	61420	91	63591	67524
96	RYGO3	MFR	APR-SEP	ROGUE - AT RAYGOLD	452	456	55	463	831
97	SALW4	RIW	APR-SEP	SALT - ABV PALISADES RES NR ETNA	158	162	44	172	368
98	SERO3	PDT	APR-SEP	JOHN DAY - AT SERVICE CK	266	266	33	268	798
99	SFLN2	PIH	APR-SEP	SALMON FALLS CREEK - NR SAN JACINTO	7.81	8.18	12	8.99	67.85
100	SHYI1	PIH	APR-SEP	SNAKE - NEAR SHELLEY	2806	2830	58	2874	4905
101	SKHI1	BOI	APR-SEP	SNAKE - AT KING HILL	2352	2407	71	2548	3412
102	SLCQ2	CAN	APR-SEP	SLOCAN - NEAR CRESCENT VALLEY	1711	1793	93	2009	1933
103	SLMO3	PQR	APR-SEP	WILLAMETTE - AT SALEM	2567	2599	55	2736	4754
104	SMKQ2	CAN	APR-SEP	SIMILKAMEEN - NEAR HEDLEY	694	704	70	714	1004
105	SMNI1	MSO	APR-SEP	SALMON - AT SALMON	682	689	74	706	929
106	SPDI1	OTX	APR-SEP	CLEARWATER - AT SPALDING	5355	5376	72	5422	7481
107	SPOW1	OTX	APR-SEP	SPOKANE - AT SPOKANE	1504	1506	58	1517	2587
108	SRGM8	MSO	APR-SEP	CLARK FORK - AT ST REGIS	3168	3184	84	3232	3771
109	STHW1	OTX	APR-SEP	STEHEKIN - AT STEHEKIN	580	588	72	598	814
110	SWAI1	BOI	APR-SEP	SNAKE - BELOW SWAN FALLS	2125	2173	67	2302	3258
111	TDAO3	PDT	APR-SEP	COLUMBIA - THE DALLES DAM	77416	79067	84	81221	94166
112	TEAI1	PIH	APR-SEP	TETON - NEAR ST. ANTHONY	282	286	64	296	447
113	TONW1	OTX	APR-SEP	OKANOGAN - NEAR TONASKET	982	998	58	1022	1720
114	TOPI1	PIH	APR-SEP	PORTNEUF - AT TOPAZ	49.65	50.48	70	52.37	72.20
115	TRYO3	PDT	APR-SEP	GRANDE RONDE - TROY	672	676	51	683	1331
116	UNYO3	PDT	APR-SEP	BURNT - Unity Dam & Burnt RVR NR Hereford	3.73	3.86	12	4.3	31.00
117	VIDO3	PQR	APR-SEP	MCKENZIE - NEAR VIDA	772	777	65	789	1195
118	WDHN2	LKN	APR-SEP	OWYHEE - WILDHORSE DAM	-4.44	-4.24	-27	-3.84	15.92
119	WEII1	BOI	APR-SEP	SNAKE - AT WEISER	4236	4279	72	4461	5956
120	WGCM8	MSO	APR-SEP	MF FLATHEAD - NEAR WEST GLACIER	1522	1528	90	1569	1697
121	WHBI1	MSO	APR-SEP	SALMON - AT WHITEBIRD	4702	4712	77	4734	6158
122	WODI1	PIH	APR-SEP	LITTLE WOOD - NEAR CAREY	37.46	38.04	50	39.3	76.59
123	WSRI1	BOI	APR-SEP	WEISER - NEAR WEISER	267	268	69	269	389
124	WTLO3	PQR	APR-SEP	SOUTH SANTIAM - AT WATERLOO	298	301	51	316	590

Link to main Northwest River Forecast Center (NWRFC) web site

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