Water Supply Forecast Listing

Header for Water Supply Period Rankings Page

Summary for Water Year (2026)

Ensemble Date: 2025-12-27 Issued Date: 2025-12-27

#	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	501	751	111	1111	680
2	ABOM8	MSO	APR-SEP	CLARK FORK - ABOVE MISSOULA	1127	1621	103	2345	1571
3	ALFW1	OTX	APR-SEP	PEND OREILLE - ALBENI FALLS DAM	10272	12822	96	17842	13347
4	AMFI1	PIH	APR-SEP	SNAKE - AT AMERICAN FALLS DAM	1200	2653	101	4335	2624
5	ANTI1	PIH	APR-SEP	HENRYS FORK - AT ST. ANTHONY	377	690	87	930	794
6	ARAI1	BOI	APR-SEP	SF BOISE - ANDERSON RANCH DAM	265	486	98	668	495
7	ARDQ2	OTX	APR-SEP	COLUMBIA - ARROW LAKES (HUGH KEENLEYSIDE DAM)	22656	26332	109	30918	24059
8	BELM8	MSO	APR-SEP	CLARK FORK - BELOW MISSOULA	2190	3019	104	4315	2893
9	BEUO3	BOI	APR-SEP	NF MALHEUR - AT BEULAH	20.22	47.22	80	85.94	59.29
10	BFEI1	OTX	APR-SEP	KOOTENAI - AT BONNERS FERRY	6984	9375	111	10944	8463
11	BIRQ2	CAN	APR-SEP	COLUMBIA - AT BIRCHBANK	37219	45773	108	52474	42578
12	BITM8	MSO	APR-SEP	BITTERROOT - NEAR MISSOULA	986	1391	108	1791	1289
13	BONM8	MSO	APR-SEP	BLACKFOOT - NEAR BONNER	615	798	90	1272	891
14	BONO3	PQR	APR-SEP	COLUMBIA - BONNEVILLE DAM	75807	95207	100	111952	95202
15	BRNI1	BOI	APR-SEP	SNAKE - BROWNLEE DAM	4552	6461	101	9968	6398
16	BUMW1	PDT	APR-SEP	BUMPING - BELOW BUMPING DAM	71.79	94.96	76	149	125
17	BUSO3	BOI	APR-SEP	SILVIES - NEAR BURNS	8.87	18.18	25	56.16	71.47
18	CABI1	OTX	APR-SEP	CLARK FORK - CABINET GORGE DAM	9601	11984	103	16651	11639
19	CASW1	PQR	APR-SEP	COWLITZ - AT CASTLE ROCK	1589	2179	87	2978	2504
20	CFMM8	MSO	APR-SEP	FLATHEAD - AT COLUMBIA FALLS	4152	5534	98	6998	5634
21	CHDW1	OTX	APR-SEP	CHELAN - LAKE CHELAN DAM	826	1083	95	1515	1139
22	CHEI1	PIH	APR-SEP	FALL RIVER - NEAR CHESTER	175	319	85	452	377
23	CIBW1	OTX	APR-SEP	COLUMBIA - AT INTL BOUNDARY	48996	59974	105	68594	56951
24	CLDI1	OTX	APR-SEP	ST JOE - AT CALDER	688	969	85	1471	1138
25	CLEW1	PDT	APR-SEP	CLE ELUM - NEAR ROSLYN	274	347	83	509	419
26	COEI1	OTX	APR-SEP	COEUR D ALENE - COEUR D ALENE LAKE	1309	1974	79	3051	2504
27	CONW1	SEW	APR-SEP	SKAGIT - NEAR CONCRETE	4690	5579	94	7262	5955
28	CSCI1	BOI	APR-SEP	NF PAYETTE - CASCADE DAM	244	418	86	580	487
29	DARM8	MSO	APR-SEP	BITTERROOT - NEAR DARBY	339	523	101	750	519
30	DCDQ2	CAN	APR-SEP	DUNCAN - DUNCAN DAM	2074	2425	109	2844	2224
31	DONO3	BOI	APR-SEP	DONNER UND BLITZEN - NR FRENCHGLEN	23.55	49.47	79	80.49	62.51
32	DRBI1	BOI	APR-SEP	DEADWOOD - BELOW DEADWOOD RES	76.83	121	90	171	135
33	DRSW1	SEW	APR-SEP	DUNGENESS - NEAR SEQUIM	96.93	137	94	178	145
34	DWRI1	MSO	APR-SEP	NF CLEARWATER - DWORSHAK DAM	1486	2086	80	2795	2620
35	EASI1	OTX	APR-SEP	MOYIE - AT EASTPORT	292	434	110	593	395
36	EGCO3	BOI	APR-SEP	EAGLE CREEK - ABOVE SKULL CK	88.82	134	77	168	174
37	EMMI1	BOI	APR-SEP	PAYETTE - NEAR EMMETT	723	1269	96	1855	1325
38	ENVI1	OTX	APR-SEP	NF COEUR D ALENE - AT ENAVILLE	358	576	78	894	743
39	ESTO3	PQR	APR-SEP	CLACKAMAS - AT ESTACADA	478	635	87	840	733
40	FCFM8	MSO	APR-SEP	NF FLATHEAD - NEAR COLUMBIA FALLS	1353	1754	100	2267	1750
41	GCDW1	OTX	APR-SEP	COLUMBIA - GRAND COULEE DAM	52210	63632	103	73896	61483
42	GIBO3	PDT	APR-SEP	UMATILLA - NEAR GIBBON	35.9	60.23	73	85.61	82.43
43	GREW4	RIW	APR-SEP	GREYS - AB RES NR ALPINE	258	370	100	488	371
44	HALI1	PIH	APR-SEP	BIG WOOD - AT HAILEY	173	297	116	419	257
45	HCDI1	PDT	APR-SEP	SNAKE - AT HELLS CANYON DAM	4552	6461	96	9968	6725
46	HEII1	PIH	APR-SEP	SNAKE - NEAR HEISE	2729	3868	100	5120	3849
47	HHWM8	MSO	APR-SEP	SF FLATHEAD - HUNGRY HORSE DAM	1581	1907	91	2516	2088
48	HLKW1	PDT	APR-SEP	YAKIMA - NEAR HORLICK	611	788	82	1140	962
49	HOTI1	BOI	APR-SEP	BRUNEAU - NEAR HOT SPRINGS	73.47	124	68	190	183
50	HRSI1	BOI	APR-SEP	PAYETTE - NEAR HORSESHOE BEND	907	1453	91	2033	1597
51	HWRI1	PIH	APR-SEP	BIG LOST - AT HOWELL RANCH NEAR CHILLY	146	237	138	327	172
52	IMNO3	PDT	APR-SEP	IMNAHA - AT IMNAHA	154	247	89	332	277
53	JDAO3	PDT	APR-SEP	COLUMBIA - JOHN DAY DAM	74320	93494	101	109925	92354
54	JLKW4	RIW	APR-SEP	SNAKE - JACKSON LAKE AT DAM	599	816	96	1029	849
55	KACW1	PDT	APR-SEP	KACHESS - NEAR EASTON	55.35	81.6	72	122	114
56	KEEW1	PDT	APR-SEP	YAKIMA - NEAR MARTIN	64.82	96.22	75	143	129
57	KERM8	MSO	APR-SEP	FLATHEAD - SELI’Š KSANKA QLISPE’ DAM	4677	6305	96	8103	6577
58	KIOW1	PDT	APR-SEP	YAKIMA - AT KIONA	643	908	79	1461	1149
59	LAUW1	OTX	APR-SEP	KETTLE - AT LAURIER	785	1582	81	2202	1954
60	LEOI1	OTX	APR-SEP	KOOTENAI - AT LEONIA	6483	8687	111	10018	7803
61	LGDW1	OTX	APR-SEP	SNAKE - LOWER GRANITE DAM	13792	20556	92	25657	22232
62	LGNO3	PDT	APR-SEP	GRANDE RONDE - NEAR PERRY	63.11	152	87	276	176
63	LLKW1	OTX	APR-SEP	SPOKANE - AT LONGLAKE	1646	2345	81	3474	2901
64	LSTO3	PDT	APR-SEP	LOSTINE - NR LOSTINE	68.32	106	91	135	116
65	LUCI1	BOI	APR-SEP	BOISE - LUCKY PEAK DAM	735	1278	96	1817	1329
66	LYDM8	MSO	APR-SEP	KOOTENAI - LIBBY DAM	5442	7244	113	8193	6429
67	MACI1	PIH	APR-SEP	BIG LOST - MACKAY RESERVOIR NEAR MACKAY	135	224	165	313	136
68	MADO3	BOI	APR-SEP	MALHEUR - NEAR DREWSEY	15.88	35	54	72.09	64.84
69	MAGI1	PIH	APR-SEP	BIG WOOD - MAGIC DAM	110	252	105	436	240
70	MCDQ2	CAN	APR-SEP	COLUMBIA - MICA DAM	11698	13828	112	15764	12296
71	MCDW1	PDT	APR-SEP	COLUMBIA - MCNARY DAM	72592	91542	99	107956	92790
72	MEHO3	PQR	APR-SEP	NORTH SANTIAM - AT MEHAMA	504	719	84	977	855
73	MEWW1	PQR	APR-SEP	LEWIS - MERWIN DAM	648	975	90	1248	1082
74	MODO3	PDT	APR-SEP	DESCHUTES - AT MOODY NR BIGGS	1740	1814	95	1932	1902
75	MONO3	PDT	APR-SEP	NF JOHN DAY - AT MONUMENT	212	417	74	691	564
76	MYDW1	PQR	APR-SEP	COWLITZ - MAYFIELD RESERVOIR	1198	1612	86	2193	1864
77	NACW1	PDT	APR-SEP	NACHES - NEAR NACHES	499	672	83	969	807
78	NITW1	OTX	APR-SEP	SIMILKAMEEN - NEAR NIGHTHAWK	1054	1496	110	2111	1366
79	ORFI1	MSO	APR-SEP	CLEARWATER - AT OROFINO	2762	4201	91	5540	4632
80	OWYO3	BOI	APR-SEP	OWYHEE - OWYHEE DAM	123	261	78	592	336
81	PALI1	PIH	APR-SEP	SNAKE - NEAR IRWIN	2505	3519	98	4700	3577
82	PARI1	BOI	APR-SEP	BOISE - NEAR PARMA	373	585	100	1066	584
83	PARW1	PDT	APR-SEP	YAKIMA - NEAR PARKER	1385	1661	87	2389	1899
84	PATW1	OTX	APR-SEP	METHOW - NEAR PATEROS	929	1250	130	1735	965
85	PDTO3	PDT	APR-SEP	UMATILLA - AT PENDLETON	60.39	127	81	205	158
86	PESW1	OTX	APR-SEP	WENATCHEE - AT PESHASTIN	1004	1230	82	1747	1496
87	PLNM8	MSO	APR-SEP	CLARK FORK - NEAR PLAINS	8284	10402	98	14417	10574
88	PRDW1	OTX	APR-SEP	COLUMBIA - BLO PRIEST RAPIDS DAM	57315	69422	102	81347	68162
89	PRTI1	OTX	APR-SEP	PRIEST - NEAR PRIEST RIVER	430	630	75	895	843
90	QBYQ2	CAN	APR-SEP	KOOTENAI - KOOTENAY L AT QUEENS BAY	13257	17365	110	20025	15842
91	REVQ2	CAN	APR-SEP	COLUMBIA - REVELSTOKE DAM	16374	19104	111	21961	17242
92	REXI1	PIH	APR-SEP	HENRYS FORK - AT REXBURG	784	1269	74	1707	1710
93	RIMW1	PDT	APR-SEP	TIETON - AT TIETON DAM	173	211	94	276	225
94	RIRI1	PIH	APR-SEP	WILLOW CREEK - NEAR RIRIE	21.87	65.7	109	139	60.33
95	RISW1	OTX	APR-SEP	COLUMBIA - BLO ROCK ISLAND DAM	57295	69410	103	81343	67524
96	RYGO3	MFR	APR-SEP	ROGUE - AT RAYGOLD	422	717	86	1006	831
97	SALW4	RIW	APR-SEP	SALT - ABV PALISADES RES NR ETNA	231	372	101	522	368
98	SERO3	PDT	APR-SEP	JOHN DAY - AT SERVICE CK	282	570	71	935	798
99	SFLN2	PIH	APR-SEP	SALMON FALLS CREEK - NR SAN JACINTO	26.88	52.69	78	103	67.85
100	SHYI1	PIH	APR-SEP	SNAKE - NEAR SHELLEY	3177	4702	96	6318	4905
101	SKHI1	BOI	APR-SEP	SNAKE - AT KING HILL	2349	2647	78	4639	3412
102	SLCQ2	CAN	APR-SEP	SLOCAN - NEAR CRESCENT VALLEY	1730	2303	119	2566	1933
103	SLMO3	PQR	APR-SEP	WILLAMETTE - AT SALEM	2648	4224	89	5944	4754
104	SMKQ2	CAN	APR-SEP	SIMILKAMEEN - NEAR HEDLEY	897	1197	119	1619	1004
105	SMNI1	MSO	APR-SEP	SALMON - AT SALMON	678	1002	108	1339	929
106	SPDI1	OTX	APR-SEP	CLEARWATER - AT SPALDING	4374	6467	86	8396	7481
107	SPOW1	OTX	APR-SEP	SPOKANE - AT SPOKANE	1366	2061	80	3162	2587
108	SRGM8	MSO	APR-SEP	CLARK FORK - AT ST REGIS	2914	3805	101	5477	3771
109	STHW1	OTX	APR-SEP	STEHEKIN - AT STEHEKIN	621	756	93	999	814
110	SWAI1	BOI	APR-SEP	SNAKE - BELOW SWAN FALLS	2601	2896	89	4863	3258
111	TDAO3	PDT	APR-SEP	COLUMBIA - THE DALLES DAM	74807	94086	100	110581	94166
112	TEAI1	PIH	APR-SEP	TETON - NEAR ST. ANTHONY	291	451	101	599	447
113	TONW1	OTX	APR-SEP	OKANOGAN - NEAR TONASKET	1248	1813	105	2476	1720
114	TOPI1	PIH	APR-SEP	PORTNEUF - AT TOPAZ	42.01	63.82	88	84.33	72.20
115	TRYO3	PDT	APR-SEP	GRANDE RONDE - TROY	575	1104	83	1551	1331
116	UNYO3	PDT	APR-SEP	BURNT - Unity Dam & Burnt RVR NR Hereford	5.8	22.77	73	38.21	31.00
117	VIDO3	PQR	APR-SEP	MCKENZIE - NEAR VIDA	809	1121	94	1470	1195
118	WDHN2	LKN	APR-SEP	OWYHEE - WILDHORSE DAM	3.4	16.9	106	35.3	15.92
119	WEII1	BOI	APR-SEP	SNAKE - AT WEISER	4260	5955	100	9384	5956
120	WGCM8	MSO	APR-SEP	MF FLATHEAD - NEAR WEST GLACIER	1278	1757	104	2187	1697
121	WHBI1	MSO	APR-SEP	SALMON - AT WHITEBIRD	3718	5762	94	7411	6158
122	WODI1	PIH	APR-SEP	LITTLE WOOD - NEAR CAREY	45.1	96.93	127	165	76.59
123	WSRI1	BOI	APR-SEP	WEISER - NEAR WEISER	183	317	81	474	389
124	WTLO3	PQR	APR-SEP	SOUTH SANTIAM - AT WATERLOO	306	531	90	795	590

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

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