Water Supply Forecast Listing

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Summary for Water Year (2026)

Ensemble Date: 2026-03-09 Issued Date: 2026-03-09

#	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	588	763	112	1093	680
2	ABOM8	MSO	APR-SEP	CLARK FORK - ABOVE MISSOULA	1446	1758	112	2280	1571
3	ALFW1	OTX	APR-SEP	PEND OREILLE - ALBENI FALLS DAM	11553	12976	97	16191	13347
4	AMFI1	PIH	APR-SEP	SNAKE - AT AMERICAN FALLS DAM	1428	1898	72	3234	2624
5	ANTI1	PIH	APR-SEP	HENRYS FORK - AT ST. ANTHONY	427	539	68	709	794
6	ARAI1	BOI	APR-SEP	SF BOISE - ANDERSON RANCH DAM	239	324	65	423	495
7	ARDQ2	OTX	APR-SEP	COLUMBIA - ARROW LAKES (HUGH KEENLEYSIDE DAM)	28301	30166	125	32283	24059
8	BELM8	MSO	APR-SEP	CLARK FORK - BELOW MISSOULA	2749	3218	111	4089	2893
9	BEUO3	BOI	APR-SEP	NF MALHEUR - AT BEULAH	18.73	22.79	38	34.66	59.29
10	BFEI1	OTX	APR-SEP	KOOTENAI - AT BONNERS FERRY	8410	9448	112	10841	8463
11	BIRQ2	CAN	APR-SEP	COLUMBIA - AT BIRCHBANK	46600	50973	120	53528	42578
12	BITM8	MSO	APR-SEP	BITTERROOT - NEAR MISSOULA	1221	1463	113	1762	1289
13	BONM8	MSO	APR-SEP	BLACKFOOT - NEAR BONNER	805	976	109	1187	891
14	BONO3	PQR	APR-SEP	COLUMBIA - BONNEVILLE DAM	89175	96076	101	107073	95202
15	BRNI1	BOI	APR-SEP	SNAKE - BROWNLEE DAM	4625	5458	85	6232	6398
16	BUMW1	PDT	APR-SEP	BUMPING - BELOW BUMPING DAM	78.45	91.12	73	115	125
17	BUSO3	BOI	APR-SEP	SILVIES - NEAR BURNS	5.9	10.09	14	19.44	71.47
18	CABI1	OTX	APR-SEP	CLARK FORK - CABINET GORGE DAM	10716	12026	103	14622	11639
19	CASW1	PQR	APR-SEP	COWLITZ - AT CASTLE ROCK	1709	2081	83	2891	2504
20	CFMM8	MSO	APR-SEP	FLATHEAD - AT COLUMBIA FALLS	4405	5146	91	6062	5634
21	CHDW1	OTX	APR-SEP	CHELAN - LAKE CHELAN DAM	890	982	86	1148	1139
22	CHEI1	PIH	APR-SEP	FALL RIVER - NEAR CHESTER	213	265	70	358	377
23	CIBW1	OTX	APR-SEP	COLUMBIA - AT INTL BOUNDARY	60131	64508	113	69072	56951
24	CLDI1	OTX	APR-SEP	ST JOE - AT CALDER	802	947	83	1130	1138
25	CLEW1	PDT	APR-SEP	CLE ELUM - NEAR ROSLYN	272	313	75	371	419
26	COEI1	OTX	APR-SEP	COEUR D ALENE - COEUR D ALENE LAKE	1501	1902	76	2446	2504
27	CONW1	SEW	APR-SEP	SKAGIT - NEAR CONCRETE	4971	5555	93	6333	5955
28	CSCI1	BOI	APR-SEP	NF PAYETTE - CASCADE DAM	321	414	85	527	487
29	DARM8	MSO	APR-SEP	BITTERROOT - NEAR DARBY	450	559	108	721	519
30	DCDQ2	CAN	APR-SEP	DUNCAN - DUNCAN DAM	2529	2708	122	2878	2224
31	DONO3	BOI	APR-SEP	DONNER UND BLITZEN - NR FRENCHGLEN	18.52	27.33	44	49.12	62.51
32	DRBI1	BOI	APR-SEP	DEADWOOD - BELOW DEADWOOD RES	84.26	102	76	131	135
33	DRSW1	SEW	APR-SEP	DUNGENESS - NEAR SEQUIM	107	123	85	156	145
34	DWRI1	MSO	APR-SEP	NF CLEARWATER - DWORSHAK DAM	1763	2090	80	2613	2620
35	EASI1	OTX	APR-SEP	MOYIE - AT EASTPORT	343	411	104	531	395
36	EGCO3	BOI	APR-SEP	EAGLE CREEK - ABOVE SKULL CK	79.72	103	59	140	174
37	EMMI1	BOI	APR-SEP	PAYETTE - NEAR EMMETT	889	1118	84	1469	1325
38	ENVI1	OTX	APR-SEP	NF COEUR D ALENE - AT ENAVILLE	392	546	74	752	743
39	ESTO3	PQR	APR-SEP	CLACKAMAS - AT ESTACADA	451	589	80	765	733
40	FCFM8	MSO	APR-SEP	NF FLATHEAD - NEAR COLUMBIA FALLS	1269	1516	87	1814	1750
41	GCDW1	OTX	APR-SEP	COLUMBIA - GRAND COULEE DAM	63322	68577	112	73706	61483
42	GIBO3	PDT	APR-SEP	UMATILLA - NEAR GIBBON	29.97	44.86	54	66.58	82.43
43	GREW4	RIW	APR-SEP	GREYS - AB RES NR ALPINE	279	318	86	398	371
44	HALI1	PIH	APR-SEP	BIG WOOD - AT HAILEY	191	251	98	330	257
45	HCDI1	PDT	APR-SEP	SNAKE - AT HELLS CANYON DAM	4625	5458	81	6232	6725
46	HEII1	PIH	APR-SEP	SNAKE - NEAR HEISE	3009	3403	88	4341	3849
47	HHWM8	MSO	APR-SEP	SF FLATHEAD - HUNGRY HORSE DAM	1802	2017	97	2339	2088
48	HLKW1	PDT	APR-SEP	YAKIMA - NEAR HORLICK	609	707	73	828	962
49	HOTI1	BOI	APR-SEP	BRUNEAU - NEAR HOT SPRINGS	48.74	78.61	43	135	183
50	HRSI1	BOI	APR-SEP	PAYETTE - NEAR HORSESHOE BEND	1015	1253	78	1597	1597
51	HWRI1	PIH	APR-SEP	BIG LOST - AT HOWELL RANCH NEAR CHILLY	148	204	119	273	172
52	IMNO3	PDT	APR-SEP	IMNAHA - AT IMNAHA	152	221	80	326	277
53	JDAO3	PDT	APR-SEP	COLUMBIA - JOHN DAY DAM	87660	94466	102	105277	92354
54	JLKW4	RIW	APR-SEP	SNAKE - JACKSON LAKE AT DAM	672	757	89	913	849
55	KACW1	PDT	APR-SEP	KACHESS - NEAR EASTON	57.89	72.93	64	90.41	114
56	KEEW1	PDT	APR-SEP	YAKIMA - NEAR MARTIN	65.69	85.25	66	105	129
57	KERM8	MSO	APR-SEP	FLATHEAD - SELI’Š KSANKA QLISPE’ DAM	5074	5928	90	7190	6577
58	KIOW1	PDT	APR-SEP	YAKIMA - AT KIONA	754	909	79	1184	1149
59	LAUW1	OTX	APR-SEP	KETTLE - AT LAURIER	963	1452	74	1987	1954
60	LEOI1	OTX	APR-SEP	KOOTENAI - AT LEONIA	7832	8779	113	10026	7803
61	LGDW1	OTX	APR-SEP	SNAKE - LOWER GRANITE DAM	14916	17966	81	21534	22232
62	LGNO3	PDT	APR-SEP	GRANDE RONDE - NEAR PERRY	39.88	98.51	56	230	176
63	LLKW1	OTX	APR-SEP	SPOKANE - AT LONGLAKE	1817	2248	77	2831	2901
64	LSTO3	PDT	APR-SEP	LOSTINE - NR LOSTINE	58.94	76.16	66	104	116
65	LUCI1	BOI	APR-SEP	BOISE - LUCKY PEAK DAM	595	812	61	1066	1329
66	LYDM8	MSO	APR-SEP	KOOTENAI - LIBBY DAM	6752	7542	117	8641	6429
67	MACI1	PIH	APR-SEP	BIG LOST - MACKAY RESERVOIR NEAR MACKAY	134	187	137	257	136
68	MADO3	BOI	APR-SEP	MALHEUR - NEAR DREWSEY	13.54	20.72	32	37.09	64.84
69	MAGI1	PIH	APR-SEP	BIG WOOD - MAGIC DAM	123	191	79	296	240
70	MCDQ2	CAN	APR-SEP	COLUMBIA - MICA DAM	14233	15304	124	16626	12296
71	MCDW1	PDT	APR-SEP	COLUMBIA - MCNARY DAM	86241	93014	100	103571	92790
72	MEHO3	PQR	APR-SEP	NORTH SANTIAM - AT MEHAMA	456	646	76	869	855
73	MEWW1	PQR	APR-SEP	LEWIS - MERWIN DAM	696	891	82	1211	1082
74	MODO3	PDT	APR-SEP	DESCHUTES - AT MOODY NR BIGGS	1686	1726	91	1774	1902
75	MONO3	PDT	APR-SEP	NF JOHN DAY - AT MONUMENT	82.93	212	38	389	564
76	MYDW1	PQR	APR-SEP	COWLITZ - MAYFIELD RESERVOIR	1292	1568	84	2106	1864
77	NACW1	PDT	APR-SEP	NACHES - NEAR NACHES	550	622	77	759	807
78	NITW1	OTX	APR-SEP	SIMILKAMEEN - NEAR NIGHTHAWK	1455	1696	124	1991	1366
79	ORFI1	MSO	APR-SEP	CLEARWATER - AT OROFINO	3417	4059	88	4861	4632
80	OWYO3	BOI	APR-SEP	OWYHEE - OWYHEE DAM	45.07	102	30	266	336
81	PALI1	PIH	APR-SEP	SNAKE - NEAR IRWIN	2760	3130	88	3978	3577
82	PARI1	BOI	APR-SEP	BOISE - NEAR PARMA	395	479	82	569	584
83	PARW1	PDT	APR-SEP	YAKIMA - NEAR PARKER	1396	1558	82	1855	1899
84	PATW1	OTX	APR-SEP	METHOW - NEAR PATEROS	1055	1205	125	1369	965
85	PDTO3	PDT	APR-SEP	UMATILLA - AT PENDLETON	40.05	73.81	47	128	158
86	PESW1	OTX	APR-SEP	WENATCHEE - AT PESHASTIN	1164	1294	87	1487	1496
87	PLNM8	MSO	APR-SEP	CLARK FORK - NEAR PLAINS	9346	10512	99	12766	10574
88	PRDW1	OTX	APR-SEP	COLUMBIA - BLO PRIEST RAPIDS DAM	68542	74531	109	80120	68162
89	PRTI1	OTX	APR-SEP	PRIEST - NEAR PRIEST RIVER	421	532	63	707	843
90	QBYQ2	CAN	APR-SEP	KOOTENAI - KOOTENAY L AT QUEENS BAY	16669	18225	115	20497	15842
91	REVQ2	CAN	APR-SEP	COLUMBIA - REVELSTOKE DAM	20148	21573	125	23226	17242
92	REXI1	PIH	APR-SEP	HENRYS FORK - AT REXBURG	834	979	57	1310	1710
93	RIMW1	PDT	APR-SEP	TIETON - AT TIETON DAM	198	214	95	246	225
94	RIRI1	PIH	APR-SEP	WILLOW CREEK - NEAR RIRIE	24.04	36.32	60	69.8	60.33
95	RISW1	OTX	APR-SEP	COLUMBIA - BLO ROCK ISLAND DAM	68531	74518	110	80109	67524
96	RYGO3	MFR	APR-SEP	ROGUE - AT RAYGOLD	399	512	62	757	831
97	SALW4	RIW	APR-SEP	SALT - ABV PALISADES RES NR ETNA	236	292	79	400	368
98	SERO3	PDT	APR-SEP	JOHN DAY - AT SERVICE CK	127	271	34	477	798
99	SFLN2	PIH	APR-SEP	SALMON FALLS CREEK - NR SAN JACINTO	18.94	31.32	46	58.24	67.85
100	SHYI1	PIH	APR-SEP	SNAKE - NEAR SHELLEY	3559	3995	81	5301	4905
101	SKHI1	BOI	APR-SEP	SNAKE - AT KING HILL	2307	2563	75	3100	3412
102	SLCQ2	CAN	APR-SEP	SLOCAN - NEAR CRESCENT VALLEY	2083	2357	122	2618	1933
103	SLMO3	PQR	APR-SEP	WILLAMETTE - AT SALEM	2627	3635	76	5538	4754
104	SMKQ2	CAN	APR-SEP	SIMILKAMEEN - NEAR HEDLEY	1163	1318	131	1498	1004
105	SMNI1	MSO	APR-SEP	SALMON - AT SALMON	752	911	98	1235	929
106	SPDI1	OTX	APR-SEP	CLEARWATER - AT SPALDING	5345	6377	85	7747	7481
107	SPOW1	OTX	APR-SEP	SPOKANE - AT SPOKANE	1557	1973	76	2533	2587
108	SRGM8	MSO	APR-SEP	CLARK FORK - AT ST REGIS	3618	4195	111	5121	3771
109	STHW1	OTX	APR-SEP	STEHEKIN - AT STEHEKIN	650	701	86	808	814
110	SWAI1	BOI	APR-SEP	SNAKE - BELOW SWAN FALLS	2515	2772	85	3303	3258
111	TDAO3	PDT	APR-SEP	COLUMBIA - THE DALLES DAM	88093	94914	101	105780	94166
112	TEAI1	PIH	APR-SEP	TETON - NEAR ST. ANTHONY	284	339	76	483	447
113	TONW1	OTX	APR-SEP	OKANOGAN - NEAR TONASKET	1614	1933	112	2345	1720
114	TOPI1	PIH	APR-SEP	PORTNEUF - AT TOPAZ	34.73	44.8	62	58.69	72.20
115	TRYO3	PDT	APR-SEP	GRANDE RONDE - TROY	650	932	70	1379	1331
116	UNYO3	PDT	APR-SEP	BURNT - Unity Dam & Burnt RVR NR Hereford	6.12	10.83	35	20.69	31.00
117	VIDO3	PQR	APR-SEP	MCKENZIE - NEAR VIDA	879	1078	90	1386	1195
118	WDHN2	LKN	APR-SEP	OWYHEE - WILDHORSE DAM	3.18	11.1	70	29.3	15.92
119	WEII1	BOI	APR-SEP	SNAKE - AT WEISER	4355	5177	87	5908	5956
120	WGCM8	MSO	APR-SEP	MF FLATHEAD - NEAR WEST GLACIER	1238	1467	86	1751	1697
121	WHBI1	MSO	APR-SEP	SALMON - AT WHITEBIRD	4165	5084	83	6315	6158
122	WODI1	PIH	APR-SEP	LITTLE WOOD - NEAR CAREY	46.8	61.63	80	102	76.59
123	WSRI1	BOI	APR-SEP	WEISER - NEAR WEISER	195	253	65	382	389
124	WTLO3	PQR	APR-SEP	SOUTH SANTIAM - AT WATERLOO	311	485	82	745	590

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

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