Water Supply Forecast Listing

Header for Water Supply Period Rankings Page

Summary for Water Year (2026)

Ensemble Date: 2026-01-11 Issued Date: 2026-01-11

#	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	492	709	104	1081	680
2	ABOM8	MSO	APR-SEP	CLARK FORK - ABOVE MISSOULA	1042	1474	94	2093	1571
3	ALFW1	OTX	APR-SEP	PEND OREILLE - ALBENI FALLS DAM	9900	12239	92	15886	13347
4	AMFI1	PIH	APR-SEP	SNAKE - AT AMERICAN FALLS DAM	1415	2959	113	4315	2624
5	ANTI1	PIH	APR-SEP	HENRYS FORK - AT ST. ANTHONY	472	738	93	934	794
6	ARAI1	BOI	APR-SEP	SF BOISE - ANDERSON RANCH DAM	283	476	96	617	495
7	ARDQ2	OTX	APR-SEP	COLUMBIA - ARROW LAKES (HUGH KEENLEYSIDE DAM)	23637	27537	114	30773	24059
8	BELM8	MSO	APR-SEP	CLARK FORK - BELOW MISSOULA	2109	2821	98	3819	2893
9	BEUO3	BOI	APR-SEP	NF MALHEUR - AT BEULAH	21.58	38.92	66	69.97	59.29
10	BFEI1	OTX	APR-SEP	KOOTENAI - AT BONNERS FERRY	7496	9109	108	10767	8463
11	BIRQ2	CAN	APR-SEP	COLUMBIA - AT BIRCHBANK	38796	46559	109	52674	42578
12	BITM8	MSO	APR-SEP	BITTERROOT - NEAR MISSOULA	965	1295	100	1660	1289
13	BONM8	MSO	APR-SEP	BLACKFOOT - NEAR BONNER	542	702	79	1060	891
14	BONO3	PQR	APR-SEP	COLUMBIA - BONNEVILLE DAM	77517	93822	99	111485	95202
15	BRNI1	BOI	APR-SEP	SNAKE - BROWNLEE DAM	4747	6343	99	9288	6398
16	BUMW1	PDT	APR-SEP	BUMPING - BELOW BUMPING DAM	71.84	92.03	74	133	125
17	BUSO3	BOI	APR-SEP	SILVIES - NEAR BURNS	9.34	20.5	29	52.2	71.47
18	CABI1	OTX	APR-SEP	CLARK FORK - CABINET GORGE DAM	9210	11217	96	14895	11639
19	CASW1	PQR	APR-SEP	COWLITZ - AT CASTLE ROCK	1666	2254	90	3006	2504
20	CFMM8	MSO	APR-SEP	FLATHEAD - AT COLUMBIA FALLS	4063	5168	92	6458	5634
21	CHDW1	OTX	APR-SEP	CHELAN - LAKE CHELAN DAM	824	1057	93	1443	1139
22	CHEI1	PIH	APR-SEP	FALL RIVER - NEAR CHESTER	231	350	93	468	377
23	CIBW1	OTX	APR-SEP	COLUMBIA - AT INTL BOUNDARY	50255	60321	106	68904	56951
24	CLDI1	OTX	APR-SEP	ST JOE - AT CALDER	648	932	82	1353	1138
25	CLEW1	PDT	APR-SEP	CLE ELUM - NEAR ROSLYN	245	317	76	466	419
26	COEI1	OTX	APR-SEP	COEUR D ALENE - COEUR D ALENE LAKE	1300	1929	77	2808	2504
27	CONW1	SEW	APR-SEP	SKAGIT - NEAR CONCRETE	4469	5345	90	6740	5955
28	CSCI1	BOI	APR-SEP	NF PAYETTE - CASCADE DAM	310	491	101	607	487
29	DARM8	MSO	APR-SEP	BITTERROOT - NEAR DARBY	344	522	101	701	519
30	DCDQ2	CAN	APR-SEP	DUNCAN - DUNCAN DAM	2173	2406	108	2768	2224
31	DONO3	BOI	APR-SEP	DONNER UND BLITZEN - NR FRENCHGLEN	20.84	44	70	66.29	62.51
32	DRBI1	BOI	APR-SEP	DEADWOOD - BELOW DEADWOOD RES	85.55	128	95	162	135
33	DRSW1	SEW	APR-SEP	DUNGENESS - NEAR SEQUIM	99.26	131	90	168	145
34	DWRI1	MSO	APR-SEP	NF CLEARWATER - DWORSHAK DAM	1529	2102	80	2736	2620
35	EASI1	OTX	APR-SEP	MOYIE - AT EASTPORT	306	421	107	569	395
36	EGCO3	BOI	APR-SEP	EAGLE CREEK - ABOVE SKULL CK	91.74	129	74	163	174
37	EMMI1	BOI	APR-SEP	PAYETTE - NEAR EMMETT	855	1423	107	1849	1325
38	ENVI1	OTX	APR-SEP	NF COEUR D ALENE - AT ENAVILLE	345	564	76	823	743
39	ESTO3	PQR	APR-SEP	CLACKAMAS - AT ESTACADA	465	609	83	789	733
40	FCFM8	MSO	APR-SEP	NF FLATHEAD - NEAR COLUMBIA FALLS	1301	1584	91	2046	1750
41	GCDW1	OTX	APR-SEP	COLUMBIA - GRAND COULEE DAM	53741	64241	104	73928	61483
42	GIBO3	PDT	APR-SEP	UMATILLA - NEAR GIBBON	34.55	54.53	66	78.77	82.43
43	GREW4	RIW	APR-SEP	GREYS - AB RES NR ALPINE	271	356	96	464	371
44	HALI1	PIH	APR-SEP	BIG WOOD - AT HAILEY	186	295	115	398	257
45	HCDI1	PDT	APR-SEP	SNAKE - AT HELLS CANYON DAM	4747	6343	94	9288	6725
46	HEII1	PIH	APR-SEP	SNAKE - NEAR HEISE	3000	3948	103	5151	3849
47	HHWM8	MSO	APR-SEP	SF FLATHEAD - HUNGRY HORSE DAM	1577	1887	90	2381	2088
48	HLKW1	PDT	APR-SEP	YAKIMA - NEAR HORLICK	554	767	80	1051	962
49	HOTI1	BOI	APR-SEP	BRUNEAU - NEAR HOT SPRINGS	80.82	128	70	178	183
50	HRSI1	BOI	APR-SEP	PAYETTE - NEAR HORSESHOE BEND	1027	1593	100	1911	1597
51	HWRI1	PIH	APR-SEP	BIG LOST - AT HOWELL RANCH NEAR CHILLY	170	254	148	351	172
52	IMNO3	PDT	APR-SEP	IMNAHA - AT IMNAHA	151	236	85	307	277
53	JDAO3	PDT	APR-SEP	COLUMBIA - JOHN DAY DAM	75986	92211	100	109513	92354
54	JLKW4	RIW	APR-SEP	SNAKE - JACKSON LAKE AT DAM	764	965	114	1166	849
55	KACW1	PDT	APR-SEP	KACHESS - NEAR EASTON	54.15	82.35	72	113	114
56	KEEW1	PDT	APR-SEP	YAKIMA - NEAR MARTIN	62.65	97.03	75	135	129
57	KERM8	MSO	APR-SEP	FLATHEAD - SELI’Š KSANKA QLISPE’ DAM	4551	5969	91	7500	6577
58	KIOW1	PDT	APR-SEP	YAKIMA - AT KIONA	620	841	73	1333	1149
59	LAUW1	OTX	APR-SEP	KETTLE - AT LAURIER	722	1407	72	1971	1954
60	LEOI1	OTX	APR-SEP	KOOTENAI - AT LEONIA	6928	8423	108	9855	7803
61	LGDW1	OTX	APR-SEP	SNAKE - LOWER GRANITE DAM	14599	20385	92	24908	22232
62	LGNO3	PDT	APR-SEP	GRANDE RONDE - NEAR PERRY	53.4	135	77	254	176
63	LLKW1	OTX	APR-SEP	SPOKANE - AT LONGLAKE	1648	2280	79	3218	2901
64	LSTO3	PDT	APR-SEP	LOSTINE - NR LOSTINE	67.33	96.33	83	120	116
65	LUCI1	BOI	APR-SEP	BOISE - LUCKY PEAK DAM	741	1241	93	1617	1329
66	LYDM8	MSO	APR-SEP	KOOTENAI - LIBBY DAM	5740	7151	111	8280	6429
67	MACI1	PIH	APR-SEP	BIG LOST - MACKAY RESERVOIR NEAR MACKAY	157	236	173	332	136
68	MADO3	BOI	APR-SEP	MALHEUR - NEAR DREWSEY	16.6	32.73	50	59.66	64.84
69	MAGI1	PIH	APR-SEP	BIG WOOD - MAGIC DAM	130	254	106	420	240
70	MCDQ2	CAN	APR-SEP	COLUMBIA - MICA DAM	12161	13912	113	15742	12296
71	MCDW1	PDT	APR-SEP	COLUMBIA - MCNARY DAM	74612	90316	97	107619	92790
72	MEHO3	PQR	APR-SEP	NORTH SANTIAM - AT MEHAMA	494	689	81	951	855
73	MEWW1	PQR	APR-SEP	LEWIS - MERWIN DAM	657	942	87	1231	1082
74	MODO3	PDT	APR-SEP	DESCHUTES - AT MOODY NR BIGGS	1738	1791	94	1877	1902
75	MONO3	PDT	APR-SEP	NF JOHN DAY - AT MONUMENT	198	400	71	579	564
76	MYDW1	PQR	APR-SEP	COWLITZ - MAYFIELD RESERVOIR	1235	1691	91	2214	1864
77	NACW1	PDT	APR-SEP	NACHES - NEAR NACHES	498	650	81	920	807
78	NITW1	OTX	APR-SEP	SIMILKAMEEN - NEAR NIGHTHAWK	1034	1469	108	1861	1366
79	ORFI1	MSO	APR-SEP	CLEARWATER - AT OROFINO	2769	3954	85	5009	4632
80	OWYO3	BOI	APR-SEP	OWYHEE - OWYHEE DAM	124	233	69	541	336
81	PALI1	PIH	APR-SEP	SNAKE - NEAR IRWIN	2794	3671	103	4767	3577
82	PARI1	BOI	APR-SEP	BOISE - NEAR PARMA	378	509	87	865	584
83	PARW1	PDT	APR-SEP	YAKIMA - NEAR PARKER	1302	1640	86	2240	1899
84	PATW1	OTX	APR-SEP	METHOW - NEAR PATEROS	901	1209	125	1585	965
85	PDTO3	PDT	APR-SEP	UMATILLA - AT PENDLETON	51.08	111	70	173	158
86	PESW1	OTX	APR-SEP	WENATCHEE - AT PESHASTIN	951	1204	80	1633	1496
87	PLNM8	MSO	APR-SEP	CLARK FORK - NEAR PLAINS	7847	9702	92	12973	10574
88	PRDW1	OTX	APR-SEP	COLUMBIA - BLO PRIEST RAPIDS DAM	58732	69514	102	81175	68162
89	PRTI1	OTX	APR-SEP	PRIEST - NEAR PRIEST RIVER	469	644	76	893	843
90	QBYQ2	CAN	APR-SEP	KOOTENAI - KOOTENAY L AT QUEENS BAY	14212	17562	111	19784	15842
91	REVQ2	CAN	APR-SEP	COLUMBIA - REVELSTOKE DAM	16850	19577	114	21903	17242
92	REXI1	PIH	APR-SEP	HENRYS FORK - AT REXBURG	884	1327	78	1643	1710
93	RIMW1	PDT	APR-SEP	TIETON - AT TIETON DAM	181	209	93	260	225
94	RIRI1	PIH	APR-SEP	WILLOW CREEK - NEAR RIRIE	38.87	75.7	125	145	60.33
95	RISW1	OTX	APR-SEP	COLUMBIA - BLO ROCK ISLAND DAM	58720	69502	103	81169	67524
96	RYGO3	MFR	APR-SEP	ROGUE - AT RAYGOLD	424	645	78	930	831
97	SALW4	RIW	APR-SEP	SALT - ABV PALISADES RES NR ETNA	246	367	100	487	368
98	SERO3	PDT	APR-SEP	JOHN DAY - AT SERVICE CK	264	507	64	748	798
99	SFLN2	PIH	APR-SEP	SALMON FALLS CREEK - NR SAN JACINTO	23.11	48.14	71	84.77	67.85
100	SHYI1	PIH	APR-SEP	SNAKE - NEAR SHELLEY	3496	4921	100	6307	4905
101	SKHI1	BOI	APR-SEP	SNAKE - AT KING HILL	2355	2800	82	4487	3412
102	SLCQ2	CAN	APR-SEP	SLOCAN - NEAR CRESCENT VALLEY	1798	2296	119	2618	1933
103	SLMO3	PQR	APR-SEP	WILLAMETTE - AT SALEM	2542	4018	85	5820	4754
104	SMKQ2	CAN	APR-SEP	SIMILKAMEEN - NEAR HEDLEY	879	1159	115	1464	1004
105	SMNI1	MSO	APR-SEP	SALMON - AT SALMON	778	1052	113	1406	929
106	SPDI1	OTX	APR-SEP	CLEARWATER - AT SPALDING	4494	6305	84	7937	7481
107	SPOW1	OTX	APR-SEP	SPOKANE - AT SPOKANE	1360	1994	77	2911	2587
108	SRGM8	MSO	APR-SEP	CLARK FORK - AT ST REGIS	2820	3680	98	4880	3771
109	STHW1	OTX	APR-SEP	STEHEKIN - AT STEHEKIN	616	752	92	964	814
110	SWAI1	BOI	APR-SEP	SNAKE - BELOW SWAN FALLS	2602	3044	93	4692	3258
111	TDAO3	PDT	APR-SEP	COLUMBIA - THE DALLES DAM	76486	92772	99	110142	94166
112	TEAI1	PIH	APR-SEP	TETON - NEAR ST. ANTHONY	296	439	98	572	447
113	TONW1	OTX	APR-SEP	OKANOGAN - NEAR TONASKET	1167	1732	101	2314	1720
114	TOPI1	PIH	APR-SEP	PORTNEUF - AT TOPAZ	44.97	64.78	90	84.72	72.20
115	TRYO3	PDT	APR-SEP	GRANDE RONDE - TROY	533	962	72	1430	1331
116	UNYO3	PDT	APR-SEP	BURNT - Unity Dam & Burnt RVR NR Hereford	6.51	18.82	61	29.31	31.00
117	VIDO3	PQR	APR-SEP	MCKENZIE - NEAR VIDA	825	1044	87	1333	1195
118	WDHN2	LKN	APR-SEP	OWYHEE - WILDHORSE DAM	4.06	15.36	96	31.11	15.92
119	WEII1	BOI	APR-SEP	SNAKE - AT WEISER	4447	5878	99	8767	5956
120	WGCM8	MSO	APR-SEP	MF FLATHEAD - NEAR WEST GLACIER	1153	1535	90	1942	1697
121	WHBI1	MSO	APR-SEP	SALMON - AT WHITEBIRD	4196	5981	97	7501	6158
122	WODI1	PIH	APR-SEP	LITTLE WOOD - NEAR CAREY	52.56	98.45	129	159	76.59
123	WSRI1	BOI	APR-SEP	WEISER - NEAR WEISER	218	326	84	470	389
124	WTLO3	PQR	APR-SEP	SOUTH SANTIAM - AT WATERLOO	298	514	87	790	590

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

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