Water Supply Forecast Listing

Header for Water Supply Period Rankings Page

Summary for Water Year (2026)

Ensemble Date: 2025-11-01 Issued Date: 2025-11-01

#	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	370	638	94	1168	680
2	ABOM8	MSO	APR-SEP	CLARK FORK - ABOVE MISSOULA	856	1338	85	2346	1571
3	ALFW1	OTX	APR-SEP	PEND OREILLE - ALBENI FALLS DAM	8753	12096	91	17700	13347
4	AMFI1	PIH	APR-SEP	SNAKE - AT AMERICAN FALLS DAM	1052	2087	80	4795	2624
5	ANTI1	PIH	APR-SEP	HENRYS FORK - AT ST. ANTHONY	372	652	82	1065	794
6	ARAI1	BOI	APR-SEP	SF BOISE - ANDERSON RANCH DAM	293	495	100	826	495
7	ARDQ2	OTX	APR-SEP	COLUMBIA - ARROW LAKES (HUGH KEENLEYSIDE DAM)	19597	23492	98	27641	24059
8	BELM8	MSO	APR-SEP	CLARK FORK - BELOW MISSOULA	1654	2476	86	4230	2893
9	BEUO3	BOI	APR-SEP	NF MALHEUR - AT BEULAH	23.83	69.14	117	134	59.29
10	BFEI1	OTX	APR-SEP	KOOTENAI - AT BONNERS FERRY	5622	7716	91	10800	8463
11	BIRQ2	CAN	APR-SEP	COLUMBIA - AT BIRCHBANK	31365	39513	93	49474	42578
12	BITM8	MSO	APR-SEP	BITTERROOT - NEAR MISSOULA	837	1155	90	1950	1289
13	BONM8	MSO	APR-SEP	BLACKFOOT - NEAR BONNER	481	697	78	1239	891
14	BONO3	PQR	APR-SEP	COLUMBIA - BONNEVILLE DAM	73852	92051	97	120228	95202
15	BRNI1	BOI	APR-SEP	SNAKE - BROWNLEE DAM	4711	6345	99	11497	6398
16	BUMW1	PDT	APR-SEP	BUMPING - BELOW BUMPING DAM	80.81	119	95	175	125
17	BUSO3	BOI	APR-SEP	SILVIES - NEAR BURNS	13.12	39.38	55	159	71.47
18	CABI1	OTX	APR-SEP	CLARK FORK - CABINET GORGE DAM	7739	11118	96	15932	11639
19	CASW1	PQR	APR-SEP	COWLITZ - AT CASTLE ROCK	1800	2488	99	3247	2504
20	CFMM8	MSO	APR-SEP	FLATHEAD - AT COLUMBIA FALLS	3845	5585	99	7262	5634
21	CHDW1	OTX	APR-SEP	CHELAN - LAKE CHELAN DAM	807	1127	99	1680	1139
22	CHEI1	PIH	APR-SEP	FALL RIVER - NEAR CHESTER	184	316	84	514	377
23	CIBW1	OTX	APR-SEP	COLUMBIA - AT INTL BOUNDARY	42798	53182	93	69977	56951
24	CLDI1	OTX	APR-SEP	ST JOE - AT CALDER	691	1030	90	1745	1138
25	CLEW1	PDT	APR-SEP	CLE ELUM - NEAR ROSLYN	313	415	99	587	419
26	COEI1	OTX	APR-SEP	COEUR D ALENE - COEUR D ALENE LAKE	1503	2213	88	3744	2504
27	CONW1	SEW	APR-SEP	SKAGIT - NEAR CONCRETE	4840	6161	103	8013	5955
28	CSCI1	BOI	APR-SEP	NF PAYETTE - CASCADE DAM	296	497	102	735	487
29	DARM8	MSO	APR-SEP	BITTERROOT - NEAR DARBY	259	427	82	842	519
30	DCDQ2	CAN	APR-SEP	DUNCAN - DUNCAN DAM	1732	2134	96	2614	2224
31	DONO3	BOI	APR-SEP	DONNER UND BLITZEN - NR FRENCHGLEN	30.82	58.9	94	121	62.51
32	DRBI1	BOI	APR-SEP	DEADWOOD - BELOW DEADWOOD RES	87.24	137	101	204	135
33	DRSW1	SEW	APR-SEP	DUNGENESS - NEAR SEQUIM	107	144	99	195	145
34	DWRI1	MSO	APR-SEP	NF CLEARWATER - DWORSHAK DAM	1613	2301	88	3252	2620
35	EASI1	OTX	APR-SEP	MOYIE - AT EASTPORT	229	381	96	603	395
36	EGCO3	BOI	APR-SEP	EAGLE CREEK - ABOVE SKULL CK	120	167	96	233	174
37	EMMI1	BOI	APR-SEP	PAYETTE - NEAR EMMETT	784	1317	99	2249	1325
38	ENVI1	OTX	APR-SEP	NF COEUR D ALENE - AT ENAVILLE	428	632	85	1023	743
39	ESTO3	PQR	APR-SEP	CLACKAMAS - AT ESTACADA	509	699	95	980	733
40	FCFM8	MSO	APR-SEP	NF FLATHEAD - NEAR COLUMBIA FALLS	1102	1693	97	2329	1750
41	GCDW1	OTX	APR-SEP	COLUMBIA - GRAND COULEE DAM	47223	58260	95	76536	61483
42	GIBO3	PDT	APR-SEP	UMATILLA - NEAR GIBBON	46.54	73.7	89	117	82.43
43	GREW4	RIW	APR-SEP	GREYS - AB RES NR ALPINE	222	322	87	475	371
44	HALI1	PIH	APR-SEP	BIG WOOD - AT HAILEY	158	258	100	480	257
45	HCDI1	PDT	APR-SEP	SNAKE - AT HELLS CANYON DAM	4711	6345	94	11497	6725
46	HEII1	PIH	APR-SEP	SNAKE - NEAR HEISE	2264	3198	83	5269	3849
47	HHWM8	MSO	APR-SEP	SF FLATHEAD - HUNGRY HORSE DAM	1326	1770	85	2401	2088
48	HLKW1	PDT	APR-SEP	YAKIMA - NEAR HORLICK	731	975	101	1309	962
49	HOTI1	BOI	APR-SEP	BRUNEAU - NEAR HOT SPRINGS	70.03	148	81	291	183
50	HRSI1	BOI	APR-SEP	PAYETTE - NEAR HORSESHOE BEND	973	1583	99	2367	1597
51	HWRI1	PIH	APR-SEP	BIG LOST - AT HOWELL RANCH NEAR CHILLY	101	176	102	348	172
52	IMNO3	PDT	APR-SEP	IMNAHA - AT IMNAHA	154	249	90	385	277
53	JDAO3	PDT	APR-SEP	COLUMBIA - JOHN DAY DAM	72433	90145	98	117916	92354
54	JLKW4	RIW	APR-SEP	SNAKE - JACKSON LAKE AT DAM	485	659	78	1030	849
55	KACW1	PDT	APR-SEP	KACHESS - NEAR EASTON	79.3	106	93	151	114
56	KEEW1	PDT	APR-SEP	YAKIMA - NEAR MARTIN	90.32	120	93	161	129
57	KERM8	MSO	APR-SEP	FLATHEAD - SELI’Š KSANKA QLISPE’ DAM	4147	6137	93	8400	6577
58	KIOW1	PDT	APR-SEP	YAKIMA - AT KIONA	604	1005	87	1617	1149
59	LAUW1	OTX	APR-SEP	KETTLE - AT LAURIER	831	1818	93	2726	1954
60	LEOI1	OTX	APR-SEP	KOOTENAI - AT LEONIA	5203	7031	90	9828	7803
61	LGDW1	OTX	APR-SEP	SNAKE - LOWER GRANITE DAM	14087	21208	95	30987	22232
62	LGNO3	PDT	APR-SEP	GRANDE RONDE - NEAR PERRY	59.64	150	85	337	176
63	LLKW1	OTX	APR-SEP	SPOKANE - AT LONGLAKE	1810	2579	89	4343	2901
64	LSTO3	PDT	APR-SEP	LOSTINE - NR LOSTINE	74.3	116	100	147	116
65	LUCI1	BOI	APR-SEP	BOISE - LUCKY PEAK DAM	847	1423	107	2390	1329
66	LYDM8	MSO	APR-SEP	KOOTENAI - LIBBY DAM	4098	5745	89	7676	6429
67	MACI1	PIH	APR-SEP	BIG LOST - MACKAY RESERVOIR NEAR MACKAY	95.57	164	120	323	136
68	MADO3	BOI	APR-SEP	MALHEUR - NEAR DREWSEY	18.36	46.95	72	152	64.84
69	MAGI1	PIH	APR-SEP	BIG WOOD - MAGIC DAM	97.29	217	90	522	240
70	MCDQ2	CAN	APR-SEP	COLUMBIA - MICA DAM	9754	11610	94	14105	12296
71	MCDW1	PDT	APR-SEP	COLUMBIA - MCNARY DAM	70949	88099	95	115886	92790
72	MEHO3	PQR	APR-SEP	NORTH SANTIAM - AT MEHAMA	537	745	87	1058	855
73	MEWW1	PQR	APR-SEP	LEWIS - MERWIN DAM	682	1053	97	1314	1082
74	MODO3	PDT	APR-SEP	DESCHUTES - AT MOODY NR BIGGS	1776	1875	99	1995	1902
75	MONO3	PDT	APR-SEP	NF JOHN DAY - AT MONUMENT	274	501	89	901	564
76	MYDW1	PQR	APR-SEP	COWLITZ - MAYFIELD RESERVOIR	1375	1859	100	2508	1864
77	NACW1	PDT	APR-SEP	NACHES - NEAR NACHES	553	834	103	1166	807
78	NITW1	OTX	APR-SEP	SIMILKAMEEN - NEAR NIGHTHAWK	861	1361	100	2220	1366
79	ORFI1	MSO	APR-SEP	CLEARWATER - AT OROFINO	3047	4311	93	6214	4632
80	OWYO3	BOI	APR-SEP	OWYHEE - OWYHEE DAM	139	317	94	758	336
81	PALI1	PIH	APR-SEP	SNAKE - NEAR IRWIN	2076	2920	82	4868	3577
82	PARI1	BOI	APR-SEP	BOISE - NEAR PARMA	368	558	95	1619	584
83	PARW1	PDT	APR-SEP	YAKIMA - NEAR PARKER	1528	2100	111	2767	1899
84	PATW1	OTX	APR-SEP	METHOW - NEAR PATEROS	663	953	99	1548	965
85	PDTO3	PDT	APR-SEP	UMATILLA - AT PENDLETON	81.28	151	96	256	158
86	PESW1	OTX	APR-SEP	WENATCHEE - AT PESHASTIN	1048	1548	103	2047	1496
87	PLNM8	MSO	APR-SEP	CLARK FORK - NEAR PLAINS	6793	9740	92	13821	10574
88	PRDW1	OTX	APR-SEP	COLUMBIA - BLO PRIEST RAPIDS DAM	52045	64104	94	84873	68162
89	PRTI1	OTX	APR-SEP	PRIEST - NEAR PRIEST RIVER	445	774	92	958	843
90	QBYQ2	CAN	APR-SEP	KOOTENAI - KOOTENAY L AT QUEENS BAY	9941	14550	92	19311	15842
91	REVQ2	CAN	APR-SEP	COLUMBIA - REVELSTOKE DAM	13742	16629	96	19730	17242
92	REXI1	PIH	APR-SEP	HENRYS FORK - AT REXBURG	815	1229	72	1899	1710
93	RIMW1	PDT	APR-SEP	TIETON - AT TIETON DAM	167	229	102	295	225
94	RIRI1	PIH	APR-SEP	WILLOW CREEK - NEAR RIRIE	15.39	61.52	102	157	60.33
95	RISW1	OTX	APR-SEP	COLUMBIA - BLO ROCK ISLAND DAM	52048	64104	95	84871	67524
96	RYGO3	MFR	APR-SEP	ROGUE - AT RAYGOLD	502	846	102	1242	831
97	SALW4	RIW	APR-SEP	SALT - ABV PALISADES RES NR ETNA	198	329	89	549	368
98	SERO3	PDT	APR-SEP	JOHN DAY - AT SERVICE CK	361	694	87	1348	798
99	SFLN2	PIH	APR-SEP	SALMON FALLS CREEK - NR SAN JACINTO	24.59	54.93	81	117	67.85
100	SHYI1	PIH	APR-SEP	SNAKE - NEAR SHELLEY	2737	3999	82	6619	4905
101	SKHI1	BOI	APR-SEP	SNAKE - AT KING HILL	2289	2762	81	5238	3412
102	SLCQ2	CAN	APR-SEP	SLOCAN - NEAR CRESCENT VALLEY	1291	1797	93	2516	1933
103	SLMO3	PQR	APR-SEP	WILLAMETTE - AT SALEM	2867	4428	93	6185	4754
104	SMKQ2	CAN	APR-SEP	SIMILKAMEEN - NEAR HEDLEY	626	1079	107	1551	1004
105	SMNI1	MSO	APR-SEP	SALMON - AT SALMON	557	964	104	1528	929
106	SPDI1	OTX	APR-SEP	CLEARWATER - AT SPALDING	5037	6761	90	9800	7481
107	SPOW1	OTX	APR-SEP	SPOKANE - AT SPOKANE	1563	2297	89	3910	2587
108	SRGM8	MSO	APR-SEP	CLARK FORK - AT ST REGIS	2305	3240	86	5313	3771
109	STHW1	OTX	APR-SEP	STEHEKIN - AT STEHEKIN	589	791	97	1082	814
110	SWAI1	BOI	APR-SEP	SNAKE - BELOW SWAN FALLS	2551	3050	94	5446	3258
111	TDAO3	PDT	APR-SEP	COLUMBIA - THE DALLES DAM	72950	90835	96	118581	94166
112	TEAI1	PIH	APR-SEP	TETON - NEAR ST. ANTHONY	266	442	99	621	447
113	TONW1	OTX	APR-SEP	OKANOGAN - NEAR TONASKET	1141	1766	103	2767	1720
114	TOPI1	PIH	APR-SEP	PORTNEUF - AT TOPAZ	36.47	59.66	83	111	72.20
115	TRYO3	PDT	APR-SEP	GRANDE RONDE - TROY	661	1285	97	2012	1331
116	UNYO3	PDT	APR-SEP	BURNT - Unity Dam & Burnt RVR NR Hereford	8.4	29.15	94	66.03	31.00
117	VIDO3	PQR	APR-SEP	MCKENZIE - NEAR VIDA	845	1151	96	1582	1195
118	WDHN2	LKN	APR-SEP	OWYHEE - WILDHORSE DAM	8.58	24.64	155	53.94	15.92
119	WEII1	BOI	APR-SEP	SNAKE - AT WEISER	4400	5868	99	10712	5956
120	WGCM8	MSO	APR-SEP	MF FLATHEAD - NEAR WEST GLACIER	1305	1868	110	2351	1697
121	WHBI1	MSO	APR-SEP	SALMON - AT WHITEBIRD	3858	6069	99	8687	6158
122	WODI1	PIH	APR-SEP	LITTLE WOOD - NEAR CAREY	29.86	63.95	83	180	76.59
123	WSRI1	BOI	APR-SEP	WEISER - NEAR WEISER	206	349	90	535	389
124	WTLO3	PQR	APR-SEP	SOUTH SANTIAM - AT WATERLOO	341	600	102	831	590

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

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