Water Supply Forecast Listing

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Summary for Water Year (2026)

Ensemble Date: 2026-06-23 Issued Date: 2026-06-23

#	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	448	458	67	479	680
2	ABOM8	MSO	APR-SEP	CLARK FORK - ABOVE MISSOULA	1301	1314	84	1344	1571
3	ALFW1	OTX	APR-SEP	PEND OREILLE - ALBENI FALLS DAM	10990	11044	83	11299	13347
4	AMFI1	PIH	APR-SEP	SNAKE - AT AMERICAN FALLS DAM	673	697	27	757	2624
5	ANTI1	PIH	APR-SEP	HENRYS FORK - AT ST. ANTHONY	273	284	36	305	794
6	ARAI1	BOI	APR-SEP	SF BOISE - ANDERSON RANCH DAM	293	295	60	299	495
7	ARDQ2	OTX	APR-SEP	COLUMBIA - ARROW LAKES (HUGH KEENLEYSIDE DAM)	23949	24877	103	26428	24059
8	BELM8	MSO	APR-SEP	CLARK FORK - BELOW MISSOULA	2386	2401	83	2450	2893
9	BEUO3	BOI	APR-SEP	NF MALHEUR - AT BEULAH	16.15	16.15	27	16.15	59.29
10	BFEI1	OTX	APR-SEP	KOOTENAI - AT BONNERS FERRY	8341	8537	101	8866	8463
11	BIRQ2	CAN	APR-SEP	COLUMBIA - AT BIRCHBANK	41574	42916	101	44975	42578
12	BITM8	MSO	APR-SEP	BITTERROOT - NEAR MISSOULA	1131	1137	88	1156	1289
13	BONM8	MSO	APR-SEP	BLACKFOOT - NEAR BONNER	853	856	96	866	891
14	BONO3	PQR	APR-SEP	COLUMBIA - BONNEVILLE DAM	76816	78494	82	80811	95202
15	BRNI1	BOI	APR-SEP	SNAKE - BROWNLEE DAM	4462	4508	70	4692	6398
16	BUMW1	PDT	APR-SEP	BUMPING - BELOW BUMPING DAM	69.25	69.42	56	70.08	125
17	BUSO3	BOI	APR-SEP	SILVIES - NEAR BURNS	12.06	12.06	17	12.06	71.47
18	CABI1	OTX	APR-SEP	CLARK FORK - CABINET GORGE DAM	10070	10119	87	10332	11639
19	CASW1	PQR	APR-SEP	COWLITZ - AT CASTLE ROCK	1605	1619	65	1656	2504
20	CFMM8	MSO	APR-SEP	FLATHEAD - AT COLUMBIA FALLS	5032	5059	90	5179	5634
21	CHDW1	OTX	APR-SEP	CHELAN - LAKE CHELAN DAM	800	807	71	818	1139
22	CHEI1	PIH	APR-SEP	FALL RIVER - NEAR CHESTER	157	160	42	168	377
23	CIBW1	OTX	APR-SEP	COLUMBIA - AT INTL BOUNDARY	53288	54754	96	57017	56951
24	CLDI1	OTX	APR-SEP	ST JOE - AT CALDER	788	790	69	793	1138
25	CLEW1	PDT	APR-SEP	CLE ELUM - NEAR ROSLYN	173	173	41	182	419
26	COEI1	OTX	APR-SEP	COEUR D ALENE - COEUR D ALENE LAKE	1407	1408	56	1418	2504
27	CONW1	SEW	APR-SEP	SKAGIT - NEAR CONCRETE	4182	4281	72	4569	5955
28	CSCI1	BOI	APR-SEP	NF PAYETTE - CASCADE DAM	340	345	71	357	487
29	DARM8	MSO	APR-SEP	BITTERROOT - NEAR DARBY	458	462	89	470	519
30	DCDQ2	CAN	APR-SEP	DUNCAN - DUNCAN DAM	2313	2392	108	2508	2224
31	DONO3	BOI	APR-SEP	DONNER UND BLITZEN - NR FRENCHGLEN	25.94	26.08	42	26.61	62.51
32	DRBI1	BOI	APR-SEP	DEADWOOD - BELOW DEADWOOD RES	98.06	98.46	73	99.86	135
33	DRSW1	SEW	APR-SEP	DUNGENESS - NEAR SEQUIM	67.37	68.28	47	70.34	145
34	DWRI1	MSO	APR-SEP	NF CLEARWATER - DWORSHAK DAM	1925	1929	74	1945	2620
35	EASI1	OTX	APR-SEP	MOYIE - AT EASTPORT	320	321	81	322	395
36	EGCO3	BOI	APR-SEP	EAGLE CREEK - ABOVE SKULL CK	98.08	98.12	56	98.23	174
37	EMMI1	BOI	APR-SEP	PAYETTE - NEAR EMMETT	1175	1179	89	1187	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	381	388	53	399	733
40	FCFM8	MSO	APR-SEP	NF FLATHEAD - NEAR COLUMBIA FALLS	1620	1631	93	1658	1750
41	GCDW1	OTX	APR-SEP	COLUMBIA - GRAND COULEE DAM	55613	57093	93	59398	61483
42	GIBO3	PDT	APR-SEP	UMATILLA - NEAR GIBBON	54.17	54.24	66	54.4	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	4538	4583	68	4768	6725
46	HEII1	PIH	APR-SEP	SNAKE - NEAR HEISE	2555	2568	67	2613	3849
47	HHWM8	MSO	APR-SEP	SF FLATHEAD - HUNGRY HORSE DAM	1854	1863	89	1901	2088
48	HLKW1	PDT	APR-SEP	YAKIMA - NEAR HORLICK	476	477	50	490	962
49	HOTI1	BOI	APR-SEP	BRUNEAU - NEAR HOT SPRINGS	30.52	31.41	17	33.42	183
50	HRSI1	BOI	APR-SEP	PAYETTE - NEAR HORSESHOE BEND	1176	1184	74	1203	1597
51	HWRI1	PIH	APR-SEP	BIG LOST - AT HOWELL RANCH NEAR CHILLY	143	144	83	145	172
52	IMNO3	PDT	APR-SEP	IMNAHA - AT IMNAHA	137	137	50	138	277
53	JDAO3	PDT	APR-SEP	COLUMBIA - JOHN DAY DAM	76981	78657	85	80986	92354
54	JLKW4	RIW	APR-SEP	SNAKE - JACKSON LAKE AT DAM	594	596	70	602	849
55	KACW1	PDT	APR-SEP	KACHESS - NEAR EASTON	48.2	48.4	42	50.72	114
56	KEEW1	PDT	APR-SEP	YAKIMA - NEAR MARTIN	60.69	61.41	48	66.5	129
57	KERM8	MSO	APR-SEP	FLATHEAD - SELI’Š KSANKA QLISPE’ DAM	5794	5825	89	5972	6577
58	KIOW1	PDT	APR-SEP	YAKIMA - AT KIONA	704	708	62	719	1149
59	LAUW1	OTX	APR-SEP	KETTLE - AT LAURIER	1002	1019	52	1086	1954
60	LEOI1	OTX	APR-SEP	KOOTENAI - AT LEONIA	7704	7899	101	8225	7803
61	LGDW1	OTX	APR-SEP	SNAKE - LOWER GRANITE DAM	15591	15668	70	15904	22232
62	LGNO3	PDT	APR-SEP	GRANDE RONDE - NEAR PERRY	50.9	51.26	29	52.48	176
63	LLKW1	OTX	APR-SEP	SPOKANE - AT LONGLAKE	1735	1737	60	1750	2901
64	LSTO3	PDT	APR-SEP	LOSTINE - NR LOSTINE	63.56	64.28	55	68.62	116
65	LUCI1	BOI	APR-SEP	BOISE - LUCKY PEAK DAM	802	806	61	814	1329
66	LYDM8	MSO	APR-SEP	KOOTENAI - LIBBY DAM	6797	6990	109	7315	6429
67	MACI1	PIH	APR-SEP	BIG LOST - MACKAY RESERVOIR NEAR MACKAY	109	109	80	111	136
68	MADO3	BOI	APR-SEP	MALHEUR - NEAR DREWSEY	11.89	11.94	18	12.16	64.84
69	MAGI1	PIH	APR-SEP	BIG WOOD - MAGIC DAM	78.57	80.56	34	84.96	240
70	MCDQ2	CAN	APR-SEP	COLUMBIA - MICA DAM	12740	13300	108	14120	12296
71	MCDW1	PDT	APR-SEP	COLUMBIA - MCNARY DAM	75546	77221	83	79551	92790
72	MEHO3	PQR	APR-SEP	NORTH SANTIAM - AT MEHAMA	432	439	51	465	855
73	MEWW1	PQR	APR-SEP	LEWIS - MERWIN DAM	595	604	56	634	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	1105	1117	60	1137	1864
77	NACW1	PDT	APR-SEP	NACHES - NEAR NACHES	491	496	61	503	807
78	NITW1	OTX	APR-SEP	SIMILKAMEEN - NEAR NIGHTHAWK	926	936	68	948	1366
79	ORFI1	MSO	APR-SEP	CLEARWATER - AT OROFINO	3340	3355	72	3389	4632
80	OWYO3	BOI	APR-SEP	OWYHEE - OWYHEE DAM	47.87	50.17	15	53.54	336
81	PALI1	PIH	APR-SEP	SNAKE - NEAR IRWIN	2463	2476	69	2520	3577
82	PARI1	BOI	APR-SEP	BOISE - NEAR PARMA	416	425	73	431	584
83	PARW1	PDT	APR-SEP	YAKIMA - NEAR PARKER	1029	1035	54	1052	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	981	982	66	989	1496
87	PLNM8	MSO	APR-SEP	CLARK FORK - NEAR PLAINS	9450	9493	90	9684	10574
88	PRDW1	OTX	APR-SEP	COLUMBIA - BLO PRIEST RAPIDS DAM	60300	61770	91	64101	68162
89	PRTI1	OTX	APR-SEP	PRIEST - NEAR PRIEST RIVER	466	475	56	490	843
90	QBYQ2	CAN	APR-SEP	KOOTENAI - KOOTENAY L AT QUEENS BAY	15419	15755	99	16410	15842
91	REVQ2	CAN	APR-SEP	COLUMBIA - REVELSTOKE DAM	17587	18306	106	19625	17242
92	REXI1	PIH	APR-SEP	HENRYS FORK - AT REXBURG	746	758	44	785	1710
93	RIMW1	PDT	APR-SEP	TIETON - AT TIETON DAM	147	151	67	157	225
94	RIRI1	PIH	APR-SEP	WILLOW CREEK - NEAR RIRIE	6.86	6.96	12	7.36	60.33
95	RISW1	OTX	APR-SEP	COLUMBIA - BLO ROCK ISLAND DAM	59723	61197	91	63525	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	267	33	268	798
99	SFLN2	PIH	APR-SEP	SALMON FALLS CREEK - NR SAN JACINTO	7.75	8.1	12	8.92	67.85
100	SHYI1	PIH	APR-SEP	SNAKE - NEAR SHELLEY	2794	2818	57	2867	4905
101	SKHI1	BOI	APR-SEP	SNAKE - AT KING HILL	2357	2412	71	2553	3412
102	SLCQ2	CAN	APR-SEP	SLOCAN - NEAR CRESCENT VALLEY	1722	1804	93	2032	1933
103	SLMO3	PQR	APR-SEP	WILLAMETTE - AT SALEM	2486	2520	53	2663	4754
104	SMKQ2	CAN	APR-SEP	SIMILKAMEEN - NEAR HEDLEY	694	703	70	713	1004
105	SMNI1	MSO	APR-SEP	SALMON - AT SALMON	681	688	74	705	929
106	SPDI1	OTX	APR-SEP	CLEARWATER - AT SPALDING	5353	5374	72	5425	7481
107	SPOW1	OTX	APR-SEP	SPOKANE - AT SPOKANE	1509	1511	58	1524	2587
108	SRGM8	MSO	APR-SEP	CLARK FORK - AT ST REGIS	3165	3182	84	3231	3771
109	STHW1	OTX	APR-SEP	STEHEKIN - AT STEHEKIN	579	587	72	596	814
110	SWAI1	BOI	APR-SEP	SNAKE - BELOW SWAN FALLS	2134	2181	67	2310	3258
111	TDAO3	PDT	APR-SEP	COLUMBIA - THE DALLES DAM	77200	78876	84	81205	94166
112	TEAI1	PIH	APR-SEP	TETON - NEAR ST. ANTHONY	282	286	64	296	447
113	TONW1	OTX	APR-SEP	OKANOGAN - NEAR TONASKET	982	996	58	1021	1720
114	TOPI1	PIH	APR-SEP	PORTNEUF - AT TOPAZ	49.64	50.45	70	52.35	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	3.64	3.79	12	4.19	31.00
117	VIDO3	PQR	APR-SEP	MCKENZIE - NEAR VIDA	772	777	65	791	1195
118	WDHN2	LKN	APR-SEP	OWYHEE - WILDHORSE DAM	-2.3	-2.06	-13	-1.62	15.92
119	WEII1	BOI	APR-SEP	SNAKE - AT WEISER	4252	4295	72	4478	5956
120	WGCM8	MSO	APR-SEP	MF FLATHEAD - NEAR WEST GLACIER	1534	1543	91	1583	1697
121	WHBI1	MSO	APR-SEP	SALMON - AT WHITEBIRD	4688	4699	76	4722	6158
122	WODI1	PIH	APR-SEP	LITTLE WOOD - NEAR CAREY	37.15	37.7	49	38.93	76.59
123	WSRI1	BOI	APR-SEP	WEISER - NEAR WEISER	267	268	69	269	389
124	WTLO3	PQR	APR-SEP	SOUTH SANTIAM - AT WATERLOO	297	300	51	315	590

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

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