Water Supply Forecast Listing

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Summary for Water Year (2026)

Ensemble Date: 2026-01-18 Issued Date: 2026-01-18

#	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	505	689	101	1011	680
2	ABOM8	MSO	APR-SEP	CLARK FORK - ABOVE MISSOULA	1095	1442	92	2011	1571
3	ALFW1	OTX	APR-SEP	PEND OREILLE - ALBENI FALLS DAM	10074	12231	92	15857	13347
4	AMFI1	PIH	APR-SEP	SNAKE - AT AMERICAN FALLS DAM	1416	2771	106	4240	2624
5	ANTI1	PIH	APR-SEP	HENRYS FORK - AT ST. ANTHONY	465	694	87	860	794
6	ARAI1	BOI	APR-SEP	SF BOISE - ANDERSON RANCH DAM	273	452	91	586	495
7	ARDQ2	OTX	APR-SEP	COLUMBIA - ARROW LAKES (HUGH KEENLEYSIDE DAM)	23294	27107	113	30291	24059
8	BELM8	MSO	APR-SEP	CLARK FORK - BELOW MISSOULA	2148	2763	95	3674	2893
9	BEUO3	BOI	APR-SEP	NF MALHEUR - AT BEULAH	21.59	34.45	58	70.11	59.29
10	BFEI1	OTX	APR-SEP	KOOTENAI - AT BONNERS FERRY	7705	9191	109	10704	8463
11	BIRQ2	CAN	APR-SEP	COLUMBIA - AT BIRCHBANK	39600	46950	110	52664	42578
12	BITM8	MSO	APR-SEP	BITTERROOT - NEAR MISSOULA	973	1254	97	1574	1289
13	BONM8	MSO	APR-SEP	BLACKFOOT - NEAR BONNER	556	719	81	1017	891
14	BONO3	PQR	APR-SEP	COLUMBIA - BONNEVILLE DAM	77192	92288	97	109503	95202
15	BRNI1	BOI	APR-SEP	SNAKE - BROWNLEE DAM	4708	6083	95	8663	6398
16	BUMW1	PDT	APR-SEP	BUMPING - BELOW BUMPING DAM	71.87	86.27	69	129	125
17	BUSO3	BOI	APR-SEP	SILVIES - NEAR BURNS	8.22	17.65	25	38.15	71.47
18	CABI1	OTX	APR-SEP	CLARK FORK - CABINET GORGE DAM	9251	11391	98	14892	11639
19	CASW1	PQR	APR-SEP	COWLITZ - AT CASTLE ROCK	1592	2126	85	2962	2504
20	CFMM8	MSO	APR-SEP	FLATHEAD - AT COLUMBIA FALLS	3954	5174	92	6468	5634
21	CHDW1	OTX	APR-SEP	CHELAN - LAKE CHELAN DAM	818	1005	88	1383	1139
22	CHEI1	PIH	APR-SEP	FALL RIVER - NEAR CHESTER	230	334	89	429	377
23	CIBW1	OTX	APR-SEP	COLUMBIA - AT INTL BOUNDARY	51037	59939	105	68465	56951
24	CLDI1	OTX	APR-SEP	ST JOE - AT CALDER	674	939	83	1302	1138
25	CLEW1	PDT	APR-SEP	CLE ELUM - NEAR ROSLYN	232	312	74	423	419
26	COEI1	OTX	APR-SEP	COEUR D ALENE - COEUR D ALENE LAKE	1353	1976	79	2676	2504
27	CONW1	SEW	APR-SEP	SKAGIT - NEAR CONCRETE	4567	5370	90	6659	5955
28	CSCI1	BOI	APR-SEP	NF PAYETTE - CASCADE DAM	316	474	97	580	487
29	DARM8	MSO	APR-SEP	BITTERROOT - NEAR DARBY	346	489	94	635	519
30	DCDQ2	CAN	APR-SEP	DUNCAN - DUNCAN DAM	2182	2426	109	2716	2224
31	DONO3	BOI	APR-SEP	DONNER UND BLITZEN - NR FRENCHGLEN	20.91	39.63	63	65.14	62.51
32	DRBI1	BOI	APR-SEP	DEADWOOD - BELOW DEADWOOD RES	83.99	122	90	156	135
33	DRSW1	SEW	APR-SEP	DUNGENESS - NEAR SEQUIM	97.22	123	85	163	145
34	DWRI1	MSO	APR-SEP	NF CLEARWATER - DWORSHAK DAM	1591	2105	80	2627	2620
35	EASI1	OTX	APR-SEP	MOYIE - AT EASTPORT	282	409	104	539	395
36	EGCO3	BOI	APR-SEP	EAGLE CREEK - ABOVE SKULL CK	91.54	124	71	156	174
37	EMMI1	BOI	APR-SEP	PAYETTE - NEAR EMMETT	837	1276	96	1783	1325
38	ENVI1	OTX	APR-SEP	NF COEUR D ALENE - AT ENAVILLE	364	576	77	784	743
39	ESTO3	PQR	APR-SEP	CLACKAMAS - AT ESTACADA	456	601	82	760	733
40	FCFM8	MSO	APR-SEP	NF FLATHEAD - NEAR COLUMBIA FALLS	1254	1599	91	2037	1750
41	GCDW1	OTX	APR-SEP	COLUMBIA - GRAND COULEE DAM	54251	63533	103	73775	61483
42	GIBO3	PDT	APR-SEP	UMATILLA - NEAR GIBBON	32.16	54.81	66	74.19	82.43
43	GREW4	RIW	APR-SEP	GREYS - AB RES NR ALPINE	272	343	93	444	371
44	HALI1	PIH	APR-SEP	BIG WOOD - AT HAILEY	178	280	109	383	257
45	HCDI1	PDT	APR-SEP	SNAKE - AT HELLS CANYON DAM	4708	6083	90	8663	6725
46	HEII1	PIH	APR-SEP	SNAKE - NEAR HEISE	3012	3870	101	4985	3849
47	HHWM8	MSO	APR-SEP	SF FLATHEAD - HUNGRY HORSE DAM	1626	1901	91	2355	2088
48	HLKW1	PDT	APR-SEP	YAKIMA - NEAR HORLICK	528	733	76	952	962
49	HOTI1	BOI	APR-SEP	BRUNEAU - NEAR HOT SPRINGS	72.26	118	64	170	183
50	HRSI1	BOI	APR-SEP	PAYETTE - NEAR HORSESHOE BEND	1020	1475	92	1875	1597
51	HWRI1	PIH	APR-SEP	BIG LOST - AT HOWELL RANCH NEAR CHILLY	159	248	144	342	172
52	IMNO3	PDT	APR-SEP	IMNAHA - AT IMNAHA	150	227	82	296	277
53	JDAO3	PDT	APR-SEP	COLUMBIA - JOHN DAY DAM	75636	90810	98	107713	92354
54	JLKW4	RIW	APR-SEP	SNAKE - JACKSON LAKE AT DAM	740	920	108	1082	849
55	KACW1	PDT	APR-SEP	KACHESS - NEAR EASTON	54.15	80.7	71	108	114
56	KEEW1	PDT	APR-SEP	YAKIMA - NEAR MARTIN	65.15	93.29	72	125	129
57	KERM8	MSO	APR-SEP	FLATHEAD - SELI’Š KSANKA QLISPE’ DAM	4498	5926	90	7467	6577
58	KIOW1	PDT	APR-SEP	YAKIMA - AT KIONA	601	814	71	1241	1149
59	LAUW1	OTX	APR-SEP	KETTLE - AT LAURIER	749	1374	70	1866	1954
60	LEOI1	OTX	APR-SEP	KOOTENAI - AT LEONIA	7188	8494	109	9748	7803
61	LGDW1	OTX	APR-SEP	SNAKE - LOWER GRANITE DAM	14634	19647	88	23714	22232
62	LGNO3	PDT	APR-SEP	GRANDE RONDE - NEAR PERRY	53.49	128	73	237	176
63	LLKW1	OTX	APR-SEP	SPOKANE - AT LONGLAKE	1723	2346	81	3082	2901
64	LSTO3	PDT	APR-SEP	LOSTINE - NR LOSTINE	66.74	91.85	79	119	116
65	LUCI1	BOI	APR-SEP	BOISE - LUCKY PEAK DAM	705	1142	86	1481	1329
66	LYDM8	MSO	APR-SEP	KOOTENAI - LIBBY DAM	5982	7273	113	8207	6429
67	MACI1	PIH	APR-SEP	BIG LOST - MACKAY RESERVOIR NEAR MACKAY	145	226	166	322	136
68	MADO3	BOI	APR-SEP	MALHEUR - NEAR DREWSEY	17.45	31.85	49	63.91	64.84
69	MAGI1	PIH	APR-SEP	BIG WOOD - MAGIC DAM	118	236	98	389	240
70	MCDQ2	CAN	APR-SEP	COLUMBIA - MICA DAM	11959	13659	111	15340	12296
71	MCDW1	PDT	APR-SEP	COLUMBIA - MCNARY DAM	73861	88876	96	105910	92790
72	MEHO3	PQR	APR-SEP	NORTH SANTIAM - AT MEHAMA	483	689	81	930	855
73	MEWW1	PQR	APR-SEP	LEWIS - MERWIN DAM	635	886	82	1210	1082
74	MODO3	PDT	APR-SEP	DESCHUTES - AT MOODY NR BIGGS	1679	1720	90	1791	1902
75	MONO3	PDT	APR-SEP	NF JOHN DAY - AT MONUMENT	190	378	67	562	564
76	MYDW1	PQR	APR-SEP	COWLITZ - MAYFIELD RESERVOIR	1181	1615	87	2183	1864
77	NACW1	PDT	APR-SEP	NACHES - NEAR NACHES	514	646	80	900	807
78	NITW1	OTX	APR-SEP	SIMILKAMEEN - NEAR NIGHTHAWK	1154	1556	114	1939	1366
79	ORFI1	MSO	APR-SEP	CLEARWATER - AT OROFINO	2881	3935	85	4814	4632
80	OWYO3	BOI	APR-SEP	OWYHEE - OWYHEE DAM	116	213	63	508	336
81	PALI1	PIH	APR-SEP	SNAKE - NEAR IRWIN	2803	3576	100	4608	3577
82	PARI1	BOI	APR-SEP	BOISE - NEAR PARMA	364	468	80	785	584
83	PARW1	PDT	APR-SEP	YAKIMA - NEAR PARKER	1292	1613	85	2142	1899
84	PATW1	OTX	APR-SEP	METHOW - NEAR PATEROS	911	1176	122	1529	965
85	PDTO3	PDT	APR-SEP	UMATILLA - AT PENDLETON	47.18	106	67	168	158
86	PESW1	OTX	APR-SEP	WENATCHEE - AT PESHASTIN	965	1207	81	1613	1496
87	PLNM8	MSO	APR-SEP	CLARK FORK - NEAR PLAINS	7927	9868	93	12853	10574
88	PRDW1	OTX	APR-SEP	COLUMBIA - BLO PRIEST RAPIDS DAM	58849	69400	102	81302	68162
89	PRTI1	OTX	APR-SEP	PRIEST - NEAR PRIEST RIVER	459	618	73	846	843
90	QBYQ2	CAN	APR-SEP	KOOTENAI - KOOTENAY L AT QUEENS BAY	14846	17384	110	19690	15842
91	REVQ2	CAN	APR-SEP	COLUMBIA - REVELSTOKE DAM	16670	19268	112	21482	17242
92	REXI1	PIH	APR-SEP	HENRYS FORK - AT REXBURG	884	1291	76	1538	1710
93	RIMW1	PDT	APR-SEP	TIETON - AT TIETON DAM	184	209	93	249	225
94	RIRI1	PIH	APR-SEP	WILLOW CREEK - NEAR RIRIE	29.72	63.57	105	125	60.33
95	RISW1	OTX	APR-SEP	COLUMBIA - BLO ROCK ISLAND DAM	58828	69383	103	81297	67524
96	RYGO3	MFR	APR-SEP	ROGUE - AT RAYGOLD	407	630	76	874	831
97	SALW4	RIW	APR-SEP	SALT - ABV PALISADES RES NR ETNA	249	356	97	476	368
98	SERO3	PDT	APR-SEP	JOHN DAY - AT SERVICE CK	241	457	57	706	798
99	SFLN2	PIH	APR-SEP	SALMON FALLS CREEK - NR SAN JACINTO	22.07	42.27	62	82.89	67.85
100	SHYI1	PIH	APR-SEP	SNAKE - NEAR SHELLEY	3508	4729	96	6142	4905
101	SKHI1	BOI	APR-SEP	SNAKE - AT KING HILL	2349	2838	83	4259	3412
102	SLCQ2	CAN	APR-SEP	SLOCAN - NEAR CRESCENT VALLEY	1834	2317	120	2662	1933
103	SLMO3	PQR	APR-SEP	WILLAMETTE - AT SALEM	2526	3862	81	5656	4754
104	SMKQ2	CAN	APR-SEP	SIMILKAMEEN - NEAR HEDLEY	909	1230	123	1549	1004
105	SMNI1	MSO	APR-SEP	SALMON - AT SALMON	765	991	107	1335	929
106	SPDI1	OTX	APR-SEP	CLEARWATER - AT SPALDING	4677	6263	84	7794	7481
107	SPOW1	OTX	APR-SEP	SPOKANE - AT SPOKANE	1414	2047	79	2776	2587
108	SRGM8	MSO	APR-SEP	CLARK FORK - AT ST REGIS	2895	3627	96	4761	3771
109	STHW1	OTX	APR-SEP	STEHEKIN - AT STEHEKIN	596	736	90	934	814
110	SWAI1	BOI	APR-SEP	SNAKE - BELOW SWAN FALLS	2589	3068	94	4473	3258
111	TDAO3	PDT	APR-SEP	COLUMBIA - THE DALLES DAM	76096	91254	97	108234	94166
112	TEAI1	PIH	APR-SEP	TETON - NEAR ST. ANTHONY	300	422	94	558	447
113	TONW1	OTX	APR-SEP	OKANOGAN - NEAR TONASKET	1292	1816	106	2266	1720
114	TOPI1	PIH	APR-SEP	PORTNEUF - AT TOPAZ	44.28	63.33	88	81.58	72.20
115	TRYO3	PDT	APR-SEP	GRANDE RONDE - TROY	552	991	74	1368	1331
116	UNYO3	PDT	APR-SEP	BURNT - Unity Dam & Burnt RVR NR Hereford	5.81	14.93	48	27.17	31.00
117	VIDO3	PQR	APR-SEP	MCKENZIE - NEAR VIDA	810	977	82	1264	1195
118	WDHN2	LKN	APR-SEP	OWYHEE - WILDHORSE DAM	3.47	14.52	91	30.62	15.92
119	WEII1	BOI	APR-SEP	SNAKE - AT WEISER	4394	5675	95	8184	5956
120	WGCM8	MSO	APR-SEP	MF FLATHEAD - NEAR WEST GLACIER	1109	1518	89	1923	1697
121	WHBI1	MSO	APR-SEP	SALMON - AT WHITEBIRD	4211	5794	94	7247	6158
122	WODI1	PIH	APR-SEP	LITTLE WOOD - NEAR CAREY	47.42	89.6	117	151	76.59
123	WSRI1	BOI	APR-SEP	WEISER - NEAR WEISER	213	314	81	443	389
124	WTLO3	PQR	APR-SEP	SOUTH SANTIAM - AT WATERLOO	299	510	86	782	590

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

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