Peakflow Report

Northwest River Forecast Center Peak Flow Forecasts Ensemble Date: 2026-05-30 Forecast Period: May 30 to September 1
Sites in NWRFC Area:
Location	Flood Stage	Flood Flow	90% Flow	50% Flow	10% Flow	90% Stage	50% Stage	10% Stage

NISQUALLY - ALDER RESERVOIR			764	924	2045
SKAGIT - ROSS RESERVOIR			7656	7656	8738
BAKER - UPPER BAKER LAKE			6106	6125	13812
COWLITZ - MOSSYROCK RESERVOIR			3843	3843	6166
BULLY CREEK - BULLY CREEK DAM			0	0	0
GREEN - HOWARD HANSON DAM			489	725	1448
WHITE - AT MUD MOUNTAIN DAM		9000	1532	1892	3051
SF COQUILLE - AT MYRTLE POINT	33.00	21398	223	223	517	4.47	4.47	5.45
CEDAR - CHESTER MORSE LAKE			0	72	608
TEANAWAY - BELOW FORKS			207	207	207	11.48	11.48	11.48
SILVIES - NEAR BURNS	12.00	2565	37	37	37	1.26	1.26	1.26
DONNER UND BLITZEN - NR FRENCHGLEN	6.00	2141	131	131	138	2.40	2.40	2.43
NASELLE - NEAR NASELLE	15.00	7180	93	180	436	4.41	4.86	5.70
WILLAPA - NEAR WILLAPA	21.00	11925	109	161	449	3.47	3.78	4.98
CHEHALIS - NEAR DOTY	318.00	12747	142	167	492	306.70	306.80	307.76
NEWAUKUM - NEAR CHEHALIS	202.50	5011	140	232	425	193.23	193.72	194.43
CHEHALIS - NEAR CENTRALIA	168.50	23709	429	708	1419	152.52	153.35	154.97
SKOOKUMCHUCK - NEAR BUCODA	211.50	2656	125	125	141	203.59	203.59	203.67
SKOOKUMCHUCK - AT CENTRALIA	189.00	7672	197	203	267	177.25	177.27	177.51
CHEHALIS - NEAR GRAND MOUND	141.00	19410	637	747	1560	129.85	130.04	131.14
CHEHALIS - AT PORTER	48.00	23088	954	1032	1976	31.85	31.99	33.48
SATSOP - NEAR SATSOP	38.00	24304	620	697	2016	28.14	28.27	29.79
WYNOOCHEE - WYNOOCHEE DAM			239	344	1889
CALAWAH - NEAR FORKS			179	398	1951	2.99	3.62	5.85
ELWHA - AT MCDONALD BRIDGE NEAR PORT ANGELES	20.00	18837	1116	1579	2362	10.36	10.84	11.51
DUNGENESS - NEAR SEQUIM	7.00	4347	365	394	585	3.33	3.40	3.77
NF SKOKOMISH - BELOW STAIRCASE RAPIDS NEAR HOODSPORT			243	377	1173	3.50	3.76	4.72
SF SKOKOMISH - NEAR UNION			207	296	847	0.31	0.53	1.19
DESCHUTES - NEAR RAINIER	11.00	5216	76	78	176	3.41	3.42	3.90
NISQUALLY - NEAR NATIONAL	9.52	8000	685	842	1416	5.15	5.37	6.03
MINERAL CREEK - NEAR MINERAL			97	127	430	8.76	8.88	9.67
PUYALLUP - NEAR ORTING	10.93	10000	941	1146	2015	7.23	7.46	8.18
CARBON - NEAR FAIRFAX	13.50	7556	460	601	1077	6.91	7.29	8.30
SOUTH PRAIRIE - AT SOUTH PRAIRIE	29.64	4000	124	229	531	24.89	25.35	26.15
WHITE - AT R STREET	115.92	7500	1577	1887	3258	112.38	112.63	113.68
ISSAQUAH CREEK - NEAR MOUTH	10.69	2000	58	76	141	4.21	4.34	4.70
SKYKOMISH - NEAR GOLD BAR	15.00	32559	3674	3821	9005	7.05	7.13	9.39
MF SNOQUALMIE - NEAR TANNER			1857	2238	4982	4.41	4.81	6.90
NF SNOQUALMIE - NEAR SNOQUALMIE FALLS			544	841	2430	3.62	4.22	6.20
SF SNOQUALMIE - NEAR GARCIA			252	252	730	10.71	10.71	11.71
SNOQUALMIE - NEAR SNOQUALMIE	13.54	20000	2982	3324	7758	5.87	6.14	8.79
PILCHUCK - NEAR SNOHOMISH	18.00	6726	210	339	893	10.59	10.95	12.01
NF STILLAGUAMISH - NEAR ARLINGTON	13.00	22675	942	1692	4241	2.97	3.64	4.93
STILLAGUAMISH - NEAR ARLINGTON	14.00	35100	2700	4696	9809	2.66	4.30	6.30
SAUK - NEAR SAUK			5882	6360	12064	5.71	5.89	7.47
SKAGIT - NEAR MT VERNON	28.00	65451	21449	21449	37661	16.81	16.81	21.60
SAMISH - NEAR BURLINGTON	11.24	3000	90	122	324	4.86	5.10	6.10
NF NOOKSACK - NEAR GLACIER			1814	1891	2838	4.63	4.72	5.83
MF NOOKSACK - NEAR DEMING			812	1116	2650	4.23	4.50	5.48
SF NOOKSACK - AT SAXON BRIDGE	8.00	12504	938	1260	2387	1.87	2.19	3.04
NOOKSACK - AT CEDARVILLE	146.50	31660	4269	4742	8570	140.00	140.19	141.50
KOOTENAI - LIBBY DAM INFLOW			66086	66086	66086
FISHER - NEAR LIBBY	7.50	4389	808	808	1683	4.59	4.59	5.60
YAAK - NEAR TROY	8.00	6976	1927	1927	1948	5.54	5.54	5.56
MOYIE - AT EASTPORT	9.00	7024	2067	2067	2067	6.03	6.03	6.03
CLARK FORK - AT DEER LODGE	6.00		427	427	454	3.15	3.15	3.19
CLARK FORK - NR DRUMMOND	8.00	5036	1785	1785	2206	4.81	4.81	5.30
ROCK CREEK - NEAR CLINTON	9.00	6946	1892	1892	1892	6.98	6.98	6.98
BLACKFOOT - NEAR BONNER	10.00	16951	7530	7530	7530	6.48	6.48	6.48
CLARK FORK - ABOVE MISSOULA	7.50	12035	11536	11536	11536	7.31	7.31	7.31
BITTERROOT - NEAR DARBY	7.50	7958	3402	3402	3402	5.24	5.24	5.24
BITTERROOT - NEAR MISSOULA	11.00	16639	11047	11047	11047	8.91	8.91	8.91
CLARK FORK - BELOW MISSOULA	11.00	48282	20530	20530	20530	6.32	6.32	6.32
ST. REGIS - NEAR ST. REGIS	8.00	6151	695	695	699	3.38	3.38	3.39
CLARK FORK - AT ST REGIS	19.00	60626	23758	23758	23758	12.46	12.46	12.46
NF FLATHEAD - NEAR COLUMBIA FALLS	13.00	35864	15118	15118	15118	8.18	8.18	8.18
MF FLATHEAD - NEAR WEST GLACIER	10.00	25750	15718	15718	15718	7.29	7.29	7.29
SF FLATHEAD - HUNGRY HORSE DAM			23120	23120	23120
FLATHEAD - AT COLUMBIA FALLS	13.00	41538	46637	46637	46637	13.82	13.82	13.82
STILLWATER - NEAR LAWRENCE PARK	7.50	2570	869	869	999	4.86	4.86	5.08
WHITEFISH - NEAR KALISPELL	5.40	1502	780	780	852	3.78	3.78	3.95
SWAN - NEAR BIGFORK	6.50	7054	5313	5313	5681	5.66	5.66	5.84
CLARK FORK - NEAR PLAINS	16.00	95805	75009	75009	75009	13.85	13.85	13.85
THOMPSON - NEAR THOMPSON FALLS	7.00	3624	637	637	637	3.73	3.73	3.73
PROSPECT CREEK - AT THOMPSON FALLS	7.50	3264	296	296	300	2.26	2.26	2.28
PEND OREILLE - LAKE PEND OREILLE NR HOPE	2063.50					2062.20	2062.20	2062.20
PRIEST - NEAR PRIEST RIVER			2938	2938	2938	3.85	3.85	3.85
PEND OREILLE - ALBENI FALLS DAM		95000	84163	84163	84163
KETTLE - NEAR FERRY	18.50	14605	5822	5822	5822	14.42	14.42	14.42
KETTLE - AT LAURIER			9326	9326	9524	8.84	8.84	8.92
COLVILLE - AT KETTLE FALLS			172	172	184	5.79	5.79	5.84
NF COEUR D ALENE - NEAR PRICHARD			233	233	1113	1.73	1.73	2.95
NF COEUR D ALENE - AT ENAVILLE	72.00	26813	1097	1097	2331	58.80	58.80	60.37
COEUR D ALENE - AT CATALDO	43.00	18298	1380	1380	2978	33.79	33.79	35.30
ST JOE - AT CALDER	13.00	18121	3681	3681	3770	8.35	8.35	8.40
ST MARIES - NEAR SANTA			228	228	293	4.70	4.70	4.89
COEUR D ALENE - COEUR D ALENE LAKE	2133.00					2128.00	2128.00	2128.00
SPOKANE - AT SPOKANE	27.00	30670	6351	6351	6448	20.54	20.54	20.58
HANGMAN CREEK - AT SPOKANE	11.00	7956	413	413	413	3.07	3.07	3.07
LITTLE SPOKANE - AT DARTFORD	6.50	2275	168	168	173	2.61	2.61	2.63
SIMILKAMEEN - NEAR NIGHTHAWK	14.00	24980	7365	7365	8394	7.99	7.99	8.48
OKANOGAN - NEAR TONASKET	15.00	18277	7738	7738	8675	10.00	10.00	10.50
OKANOGAN - AT MALOTT			7735	7735	8668	7.72	7.72	8.23
METHOW - AT WINTHROP			4382	4382	4382	14.02	14.02	14.02
METHOW - NEAR PATEROS	10.00	18282	6611	6611	6611	6.34	6.34	6.34
STEHEKIN - AT STEHEKIN	20.50	2030	4234	4234	4257	21.80	21.80	21.81
CHELAN - LAKE CHELAN DAM			9255	9255	9255
ENTIAT - NEAR ARDENVOIR	7.50	4109	1337	1337	1337	4.43	4.43	4.43
WENATCHEE - AT PESHASTIN	13.00	24180	6261	6261	6261	6.16	6.16	6.16
COLUMBIA - BLO PRIEST RAPIDS DAM	32.00	404000	188812	188812	206398	20.67	20.67	21.89
YAKIMA - NEAR HORLICK	36.00	13115	2957	2960	2975	31.03	31.03	31.04
NACHES - NEAR NACHES	17.80	6905	1237	1237	1691	14.64	14.64	14.92
YAKIMA - NEAR PARKER	10.00	21223	949	957	1308	1.90	1.91	2.31
YAKIMA - AT KIONA	13.00	16872	1725	1852	2065	3.71	3.82	4.00
SNAKE - AB JACKSON L AT FLAGG R	10.00	13099	3599	3599	3599	5.81	5.81	5.81
SNAKE - JACKSON LAKE AT DAM			5747	5747	5747
PACIFIC CREEK - AT MORAN	8.50	3975	1562	1562	1562	7.16	7.16	7.16
BUFFALO FK - AB LAVA CR NR MORAN	8.50	7000	2593	2593	2797	5.06	5.06	5.37
GROS VENTRE - AT ZENITH			1790	1790	1790	20.14	20.14	20.14
GREYS - AB RES NR ALPINE			1296	1296	1296	2.82	2.82	2.82
SALT - ABV PALISADES RES NR ETNA	5.50	3470	983	983	983	2.76	2.76	2.76
SNAKE - NEAR HEISE	8.00	19882	14107	14107	14107	6.34	6.34	6.34
FALL RIVER - NEAR CHESTER	6.50	6714	1790	1790	1988	3.69	3.69	3.85
HENRYS FORK - AT ST. ANTHONY	7.00	9071	2325	2325	3036	4.25	4.25	4.60
TETON - AB S. LEIGH CR NR DRIGGS	4.20	1812	1377	1377	1377	3.58	3.58	3.58
TETON - NEAR ST. ANTHONY	6.00	4746	2818	2818	2818	4.79	4.79	4.79
HENRYS FORK - AT REXBURG	9.50	7297	3111	3111	3111	6.39	6.39	6.39
SNAKE - NEAR SHELLEY	12.50	29054	9426	9426	9426	8.00	8.00	8.00
SNAKE - NEAR BLACKFOOT	11.00	24233	6302	6302	6302	5.28	5.28	5.28
PORTNEUF - AT TOPAZ	4.00	493	218	218	264	3.13	3.13	3.31
PORTNEUF - AT POCATELLO	8.50	812	87	87	175	3.16	3.16	4.19
SALMON FALLS CREEK - NR SAN JACINTO	10.00	1210	35	35	48	5.09	5.09	5.24
BIG LOST - AT HOWELL RANCH NEAR CHILLY	4.00	2189	1110	1110	1110	2.93	2.93	2.93
BIG LOST - MACKAY RESERVOIR NEAR MACKAY			670	670	670
BIG WOOD - AT HAILEY	6.00	3416	1095	1095	1095	3.53	3.53	3.53
BIG WOOD - MAGIC DAM			920	920	920
BRUNEAU - NEAR HOT SPRINGS	9.50	3265	147	147	196	4.99	4.99	5.17
OWYHEE - NEAR MTN CITY	8.00	1216	115	123	183	4.60	4.65	4.93
OWYHEE - OWYHEE DAM		3000	205	266	579
BOISE - NR TWIN SPRINGS			2589	2589	2791	8.38	8.38	8.55
SF BOISE - NR FEATHERVILLE	7.20	7931	1659	1659	1659	3.70	3.70	3.70
SF BOISE - ANDERSON RANCH DAM			1352	1352	1352
MORES CREEK - NR ARROWROCK DAM	8.80	4845	188	188	188	2.76	2.76	2.76
MALHEUR - NEAR DREWSEY			30	30	74	2.47	2.47	2.86
MALHEUR - NEAR VALE	19.50	3890	233	417	904	11.69	12.40	13.95
SF PAYETTE - AT LOWMAN	7.50	6928	2355	2355	2355	5.16	5.16	5.16
MF PAYETTE - NEAR CROUCH	11.80	3318	612	612	612	6.89	6.89	6.89
PAYETTE - NEAR EMMETT	10.50	15924	5461	5461	5461	5.74	5.74	5.74
WEISER - NEAR CAMBRIDGE	12.00	9278	421	421	421	4.07	4.07	4.07
WEISER - NEAR WEISER	9.50	8663	667	667	667	5.01	5.01	5.01
EAGLE CREEK - ABOVE SKULL CK			690	690	690	2.00	2.00	2.00
SNAKE - BROWNLEE DAM			15133	15133	15133
IMNAHA - AT IMNAHA	5.50	3431	773	773	773	3.19	3.19	3.19
SALMON - AT SALMON	7.50	11722	4555	4555	4555	4.56	4.56	4.56
LEMHI - NEAR LEMHI	6.50	1490	253	253	270	4.13	4.13	4.19
MF SALMON - MIDDLE FORK LODGE			4676	4676	4676	4.52	4.52	4.52
LITTLE SALMON - AT RIGGINS	10.00	7853	1625	1625	1625	5.17	5.17	5.17
SALMON - AT WHITEBIRD	32.00	97533	30586	30586	30586	21.29	21.29	21.29
GRANDE RONDE - NEAR PERRY	6.60	5440	70	74	197	1.24	1.27	1.75
MALHEUR - AGENCY VALLEY DAM			27	27	27
GRANDE RONDE - TROY	10.00	19105	3059	3059	3059	5.92	5.92	5.92
SNAKE - NEAR ANATONE	20.00	150000	50051	50051	50051	9.43	9.43	9.43
SELWAY - NEAR LOWELL	14.00	43181	12272	12272	12272	7.96	7.96	7.96
SNAKE - LOWER GRANITE DAM			73645	73645	73645
LOCHSA - NEAR LOWELL			7971	7971	10744	6.29	6.29	7.31
SF CLEARWATER - AT STITES	8.00	9846	1076	1076	2220	3.95	3.95	4.78
CLEARWATER - AT OROFINO	17.00	75187	22201	22201	22201	9.29	9.29	9.29
NF CLEARWATER - DWORSHAK DAM			10874	10874	10874
POTLATCH - BELOW LITTLE POTLATCH CR NR SPALDING			96	96	96	5.82	5.82	5.82
CLEARWATER - AT SPALDING	18.00	107596	23844	23844	28820	8.37	8.37	9.19
PALOUSE - NEAR POTLATCH	15.00	3880	71	71	71	5.88	5.88	5.88
SF PALOUSE - AT PULLMAN	7.00	2758	15	17	24	1.34	1.40	1.61
PALOUSE - AT HOOPER			230	230	230	4.39	4.39	4.39
MILL CREEK - NR WALLA WALLA			44	50	70	13.32	13.37	13.52
WALLA WALLA - NEAR TOUCHET	13.00	7676	137	137	218	3.36	3.36	3.75
UMATILLA - NEAR GIBBON	7.00	2698	85	85	98	2.92	2.92	2.99
UMATILLA - AT PENDLETON	12.30	9550	111	111	111	4.70	4.70	4.70
JOHN DAY - NEAR JOHN DAY	8.00	2596	92	92	92	3.70	3.70	3.70
NF JOHN DAY - AT MONUMENT	14.00	19143	483	483	483	3.58	3.58	3.58
JOHN DAY - AT SERVICE CK	11.50	15961	763	763	763	3.18	3.18	3.18
DESCHUTES - AT MOODY NR BIGGS	8.00	31801	4517	4517	4523	2.93	2.93	2.93
KLICKITAT - NEAR PITT	9.00	8900	1190	1190	1190	4.63	4.63	4.63
HOOD - NEAR TUCKER BRIDGE	13.00	13504	532	582	891	3.49	3.61	4.25
WHITE SALMON - NEAR UNDERWOOD			879	926	1110	3.94	4.00	4.20
SANDY - NEAR MARMOT			966	966	2302	690.29	690.29	691.55
SANDY - SANDY	19.30	40323	1055	1167	2865	8.79	8.91	10.21
MF WILLAMETTE - HILLS CREEK DAM			795	795	837
FALL CREEK - FALL CREEK RESERVOIR			147	267	407
COAST FORK WILLAMETTE - COTTAGE GROVE DAM			44	80	143
ROW - DORENA DAM			240	240	643
MCKENZIE - BELOW TRAIL BRIDGE DAM			780	780	861	6.45	6.45	6.56
SF MCKENZIE - COUGAR DAM			461	461	672
BLUE - BLUE RESERVOIR			113	114	331
MOHAWK - NEAR SPRINGFIELD	15.00	6363	121	154	220	1.49	1.65	1.95
LONG TOM - FERN RIDGE DAM			53	168	438
MARYS - NEAR PHILOMATH	20.00	4304	76	76	88	2.98	2.98	3.15
LITTLE N SANTIAM - NEAR MEHAMA			186	433	1269	3.30	3.94	5.09
THOMAS CREEK - NEAR SCIO	18.00	14297	126	126	442	4.78	4.78	6.00
LUCKIAMUTE - NEAR SUVER	27.00	6488	125	135	196	3.19	3.33	4.05
S YAMHILL - NEAR WILLAMINA			78	101	167	2.00	2.11	2.39
S YAMHILL - AT MCMINNVILLE	50.00	17632	183	209	335	10.50	10.69	11.62
MOLALLA - NEAR CANBY	23.00	27547	260	360	631	9.52	9.76	10.26
PUDDING - AT AURORA	22.00	6076	208	277	493	6.12	6.56	7.70
CLACKAMAS - THREE LYNX			919	919	1395	0.95	0.95	1.65
CLACKAMAS - AT ESTACADA	20.00	24793	1130	1173	2252	11.55	11.60	12.51
CLACKAMAS - NEAR OREGON CITY	39.00	40050	1270	1361	2465	23.72	23.83	24.97
JOHNSON CREEK - AT SYCAMORE	11.00	1250	12	18	33	1.59	1.74	2.07
COWLITZ - AT PACKWOOD	10.50	24411	2105	2105	2848	2.48	2.48	3.01
COWLITZ - AT RANDLE	18.00	17568	2690	2690	3955	6.61	6.61	7.64
CISPUS - NEAR RANDLE			836	836	1091	14.09	14.09	14.39
COWLITZ - NEAR KOSMOS			3652	3652	5535	67.36	67.36	68.57
TILTON - NEAR CINEBAR			241	559	1060	3.04	3.72	4.43
TOUTLE - AT TOWER ROAD NEAR SILVER LAKE	137.00	44162	983	1318	2589	121.04	121.37	122.36
NEHALEM - FOSS	15.00	23364	453	487	934	2.84	2.93	3.89
WILSON - NEAR TILLAMOOK	12.00	14054	238	249	1037	4.04	4.07	5.13
TRASK - TILLAMOOK	16.50	12678	170	210	565	6.01	6.14	6.99
NESTUCCA - NEAR BEAVER	18.00	20010	152	228	662	4.33	4.59	5.50
SILETZ - AT SILETZ	16.00	18873	232	429	869	2.84	3.29	4.05
ALSEA - NEAR TIDEWATER	18.00	20106	268	276	513	2.10	2.12	2.74
SIUSLAW - NEAR MAPLETON	18.00	22123	362	374	536	3.69	3.72	4.05
S UMPQUA - AT TILLER	18.00	28909	278	315	668	1.68	1.80	2.68
DEER CREEK - NEAR ROSEBURG	10.00	2100	5	7	11	2.24	2.45	3.00
STEAMBOAT CREEK - NEAR GLIDE			163	226	419	0.82	1.06	1.64
N UMPQUA - AT WINCHESTER	26.00	82464	1570	1570	1954	2.66	2.66	3.00
ELK CREEK - NEAR DRAIN	16.00	7253	10	17	38	0.89	1.01	1.20
SF COQUILLE - AT POWERS			96	96	151	0.67	0.67	0.98
NF COQUILLE - NEAR MYRTLE POINT	35.00	11958	152	154	191	4.19	4.20	4.46
BIG BUTTE CREEK - NEAR MCLEOD			55	63	125	2.75	2.81	3.17
ELK CREEK - NEAR TRAIL			26	26	93	3.58	3.58	4.18
BEAR CREEK - AT MEDFORD	10.00	5265	64	106	165	2.82	3.02	3.24
ILLINOIS - AT KERBY	35.00	49076	163	163	163	1.96	1.96	1.96
CHETCO - NEAR BROOKINGS			266	266	1591	-0.21	-0.21	2.34

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