Peak Flows at USGS Stations near Mount Rainier

Right now this page only displays the following stations/situations:
12082500 - Nisqually River near National, WA (Peaks > 2,600 cfs and/or annual peak) (WY's 1942-present)
12094000 - Carbon River near Fairfax, WA (Peaks > 1,800 cfs and/or annual peak) (WY's 1930-1978, 1991-present)
Note: A peak flow time of 12:01 indicates the high for that day, and not the exact time it occurred during that day.
Flood Recurrence Intervals are calculated from the best-fit exponential equation of the Weighted 20% Annual Exceedance Probability. Scroll to the bottom of the page for the source data/link.
The "Link Events" column attempts to show flood peaks on the Nisqually and Carbon within 24 hrs of each other (i.e., the same storm)

Show ALL flood peaks (including annual peak and subpeaks)

163 peak flows listed below (81 for Nisqually; 82 for Carbon)...

Gage	Water Year	Date/Time	Flow, CFS	Recurrence Interval	Rank	24, 48, and 72 hr Precip (in)	Precip Recorded At	Snow Depth	Is WY Peak?	Link Events
Carbon River	1930	1930-02-05 00:01	1,770	0.69	79 of 82	0.12 | 0.30 | 0.47	Longmire	--	true
Carbon River	1931	1931-03-31 00:01	2,950	1.08	65 of 82	4.25 | 6.05 | 6.05	Longmire	--	true
Carbon River	1932	1932-02-26 00:01	5,500	2.86	32 of 82	1.75 | 3.20 | 3.69	Longmire	--	true
Carbon River	1933	1932-11-13 00:01	7,100	5.28	20 of 82	2.68 | 5.24 | 5.24	Longmire	--	true
Carbon River	1934	1933-10-09 00:01	11,000	23.51	5 of 82	-- | -- | --	No Precip Data	--	true
Carbon River	1935	1934-10-25 00:01	6,500	4.20	25 of 82	2.05 | 3.28 | 5.18	Longmire	--	true
Carbon River	1936	1936-10-07 00:01	2,550	0.92	70 of 82	-- | -- | --	No Precip Data	--	true
Carbon River	1937	1937-04-14 00:01	1,810	0.70	78 of 82	1.81 | 3.21 | 3.64	Longmire	--	true
Carbon River	1938	1938-04-18 00:01	5,560	2.93	30 of 82	0.06 | 3.66 | 4.47	Longmire	--	true
Carbon River	1939	1938-12-07 00:01	2,640	0.96	66 of 82	2.30 | 2.62 | 3.28	Longmire	--	true
Carbon River	1940	1940-05-01 00:01	1,810	0.70	78 of 82	0.35 | 1.06 | 1.48	Longmire	--	true
Carbon River	1941	1940-11-29 00:01	4,040	1.63	51 of 82	0.96 | 2.83 | 4.17	Longmire	--	true
Carbon River	1942	1941-12-19 00:01	2,580	0.93	68 of 82	3.05 | 3.98 | 4.52	Longmire	--	true
Carbon River	1943	1942-11-23 00:01	4,760	2.15	42 of 82	2.75 | 3.35 | 3.75	Longmire	--	true
Nisqually River	1943	1942-11-23 00:01	7,500	2.70	37 of 81	2.75 | 3.35 | 3.75	Longmire	--	true
Carbon River	1944	1943-12-03 00:01	5,020	2.38	36 of 82	3.25 | 3.84 | 4.16	Longmire	--	true
Nisqually River	1944	1943-12-03 00:01	4,830	1.35	57 of 81	3.25 | 3.84 | 4.16	Longmire	--	true
Nisqually River	1945	1945-01-07 00:01	5,280	1.52	54 of 81	2.54 | 4.58 | 5.24	Longmire	--	true
Carbon River	1945	1945-01-07 00:01	4,370	1.86	46 of 82	2.54 | 4.58 | 5.24	Longmire	--	true
Nisqually River	1946	1945-12-28 00:01	5,000	1.42	56 of 81	3.02 | 3.89 | 4.36	Longmire	--	true
Carbon River	1946	1945-12-28 00:01	4,500	1.95	45 of 82	3.02 | 3.89 | 4.36	Longmire	--	true
Carbon River	1947	1946-12-11 00:01	5,960	3.41	29 of 82	6.11 | 7.54 | 8.68	Longmire	--	true
Nisqually River	1947	1946-12-11 00:01	8,100	3.15	31 of 81	6.11 | 7.54 | 8.68	Longmire	--	true
Carbon River	1948	1947-11-07 00:01	4,330	1.83	48 of 82	3.20 | 3.91 | 4.69	Longmire	--	true
Nisqually River	1948	1947-11-08 00:01	5,560	1.64	51 of 81	1.30 | 4.50 | 5.21	Longmire	--	true
Carbon River	1949	1948-11-23 00:01	2,440	0.89	73 of 82	1.33 | 1.58 | 1.64	Carbon	63	true
Nisqually River	1949	1949-05-13 00:01	3,010	0.85	74 of 81	0.00 | 0.00 | 0.00	Longmire	--	true
Carbon River	1950	1949-11-27 00:01	3,750	1.46	52 of 82	0.35 | 0.35 | 0.35	Carbon	--	true
Nisqually River	1950	1949-11-27 00:01	7,310	2.57	41 of 81	2.70 | 3.72 | 4.62	Longmire	--	true
Carbon River	1951	1951-02-09 00:01	4,770	2.16	41 of 82	1.92 | 2.77 | 3.60	Carbon	149	true
Nisqually River	1951	1951-02-11 00:01	6,050	1.86	49 of 81	2.05 | 3.00 | 6.05	Paradise	157	true
Carbon River	1952	1951-10-03 00:01	2,610	0.95	67 of 82	0.99 | 2.09 | 3.06	Carbon	0	true
Nisqually River	1952	1952-02-04 00:01	2,700	0.78	77 of 81	1.87 | 2.79 | 2.84	Longmire	--	true
Nisqually River	1953	1953-01-31 00:01	4,760	1.33	58 of 81	1.76 | 2.81 | 3.39	Longmire	--	true
Carbon River	1953	1953-01-31 00:01	4,580	2.01	43 of 82	1.68 | 2.14 | 4.07	Carbon	--	true
Nisqually River	1954	1953-12-09 00:01	6,640	2.16	45 of 81	4.06 | 4.06 | 4.32	Longmire	--	true
Carbon River	1954	1953-12-09 00:01	6,860	4.82	23 of 82	4.06 | 4.06 | 4.32	Longmire	--	true
Carbon River	1955	1955-02-08 00:01	2,490	0.90	72 of 82	1.51 | 3.04 | 3.58	Paradise	141	true
Nisqually River	1955	1955-06-10 00:01	3,740	1.02	67 of 81	0.00 | 0.00 | 0.00	Paradise	152	true
Carbon River	1956	1955-12-11 00:01	6,320	3.92	28 of 82	3.98 | 5.12 | 5.67	Paradise	101	true
Nisqually River	1956	1955-12-12 00:01	7,470	2.68	38 of 81	1.12 | 5.10 | 6.24	Paradise	99	true
Carbon River	1957	1956-12-10 00:01	5,280	2.63	35 of 82	3.25 | 7.52 | 8.93	Paradise	52	true
Nisqually River	1957	1957-02-26 00:01	3,680	1.01	68 of 81	1.38 | 3.19 | 5.01	Paradise	153	true
Carbon River	1958	1957-12-06 00:01	1,610	0.64	80 of 82	2.63 | 2.66 | 2.66	Paradise	56	true
Nisqually River	1958	1958-04-20 00:01	2,790	0.80	76 of 81	1.47 | 3.54 | 3.86	Paradise	188	true
Nisqually River	1959	1958-11-12 00:01	5,450	1.59	52 of 81	6.21 | 8.95 | 9.44	Paradise	60	true
Carbon River	1959	1958-11-12 00:01	4,310	1.81	49 of 82	6.21 | 8.95 | 9.44	Paradise	60	true
Carbon River	1960	1959-11-23 00:01	9,970	15.85	8 of 82	4.88 | 9.55 | 11.72	Paradise	20	true
Nisqually River	1960	1959-11-23 00:01	10,900	6.49	16 of 81	4.88 | 9.55 | 11.72	Paradise	20	true
Carbon River	1961	1960-11-16 00:01	3,360	1.26	58 of 82	2.43 | 4.03 | 5.38	Paradise	25	true
Nisqually River	1961	1961-02-21 00:01	4,350	1.20	63 of 81	3.85 | 4.79 | 7.25	Paradise	174	true
Nisqually River	1962	1962-01-07 00:01	4,350	1.20	63 of 81	2.89 | 4.84 | 5.82	Paradise	99	true
Carbon River	1962	1962-04-06 00:01	3,430	1.29	55 of 82	3.45 | 3.48 | 3.89	Paradise	147	true
Nisqually River	1963	1962-11-20 00:01	10,400	5.71	19 of 81	3.45 | 8.57 | 8.70	Paradise	12	true
Carbon River	1963	1962-11-20 00:01	6,460	4.13	27 of 82	1.94 | 4.57 | 4.57	Carbon	12	true
Carbon River	1964	1964-01-25 00:01	2,550	0.92	70 of 82	2.70 | 4.70 | 4.86	Paradise	196	true
Nisqually River	1964	1964-01-25 00:01	3,560	0.98	69 of 81	2.70 | 4.70 | 4.86	Paradise	196	true
Carbon River	1965	1965-01-29 00:01	6,800	4.71	24 of 82	4.50 | 7.35 | 9.77	Paradise	156	true
Nisqually River	1965	1965-01-29 00:01	11,000	6.66	15 of 81	4.50 | 7.35 | 9.77	Paradise	156	true
Nisqually River	1966	1966-05-06 00:01	3,080	0.86	73 of 81	0.98 | 0.98 | 0.98	Longmire	--	true
Carbon River	1966	1966-05-06 00:01	1,580	0.64	81 of 82	0.98 | 0.98 | 0.98	Carbon	--	true
Carbon River	1967	1966-10-23 00:01	1,950	0.73	76 of 82	0.18 | 1.26 | 1.94	Carbon	15	true
Nisqually River	1967	1966-12-13 00:01	5,870	1.77	50 of 81	0.95 | 2.40 | 2.57	Paradise	64	true
Nisqually River	1968	1967-12-25 00:01	8,070	3.13	32 of 81	3.98 | 5.75 | 6.97	Paradise	48	true
Carbon River	1968	1967-12-25 00:01	7,480	6.11	13 of 82	3.98 | 5.75 | 6.97	Paradise	48	true
Nisqually River	1969	1969-01-04 00:01	6,620	2.15	46 of 81	1.60 | 2.95 | 3.19	Paradise	150	true
Carbon River	1969	1969-01-05 00:01	5,390	2.74	33 of 82	2.80 | 4.40 | 5.75	Paradise	154	true
Carbon River	1970	1970-01-18 00:01	2,490	0.90	72 of 82	1.15 | 2.47 | 3.07	Paradise	115	true
Nisqually River	1970	1970-01-23 00:01	4,350	1.20	63 of 81	0.90 | 0.98 | 1.89	Paradise	100	true
Carbon River	1971	1970-11-24 00:01	4,850	2.23	40 of 82	0.96 | 2.06 | 2.06	Carbon	42	true
Nisqually River	1971	1971-01-19 00:01	4,460	1.23	60 of 81	2.42 | 3.34 | 4.36	Paradise	162	true
Nisqually River	1972	1972-01-20 00:01	7,460	2.67	39 of 81	3.51 | 6.23 | 7.57	Paradise	235	true
Carbon River	1972	1972-02-28 00:01	3,220	1.19	61 of 82	1.80 | 3.10 | 3.10	Carbon	258	true
Nisqually River	1973	1972-12-21 00:01	7,700	2.84	35 of 81	1.99 | 3.26 | 4.88	Paradise	43	true
Carbon River	1973	1972-12-21 00:01	5,000	2.36	37 of 82	1.99 | 3.26 | 4.88	Paradise	43	true
Carbon River	1974	1974-01-15 00:01	7,180	5.44	19 of 82	2.50 | 4.72 | 6.75	Paradise	132	true
Nisqually River	1974	1974-01-15 00:01	15,000	18.71	5 of 81	2.50 | 4.72 | 6.75	Paradise	132	true
Carbon River	1975	1975-01-18 00:01	7,320	5.74	16 of 82	2.50 | 4.12 | 4.24	Paradise	168	true
Nisqually River	1975	1975-01-18 00:01	7,660	2.81	36 of 81	2.50 | 4.12 | 4.24	Paradise	168	true
Carbon River	1976	1975-12-01 18:00	7,460	6.06	14 of 82	4.55 | 6.16 | 6.19	Paradise	78	true
Nisqually River	1976	1975-12-04 04:30	13,200	11.75	9 of 81	0.99 | 4.04 | 9.44	Paradise	69	true
Carbon River	1977	1977-01-18 17:00	2,150	0.79	75 of 82	1.62 | 3.73 | 3.98	Paradise	26	true
Nisqually River	1977	1977-09-04 16:45	1,910	0.64	81 of 81	2.79 | 3.04 | 3.04	Paradise	0	true
Carbon River	1978	1977-12-01 21:00	10,000	16.03	7 of 82	1.68 | 1.68 | 5.63	Paradise	56	true
Nisqually River	1978	1977-12-02 11:30	17,100	32.17	3 of 81	7.76 | 9.44 | 9.44	Paradise	53	true
Nisqually River	1979	1979-03-07 07:15	2,790	0.80	76 of 81	0.31 | 1.89 | 3.69	Paradise	148	true
Nisqually River	1980	1979-12-17 23:00	7,050	2.40	42 of 81	1.12 | 1.71 | 6.18	Paradise	58	true
Nisqually River	1981	1980-12-26 06:45	11,600	7.78	10 of 81	3.10 | 5.70 | 6.29	Paradise	39	true
Nisqually River	1982	1982-02-20 15:45	8,280	3.30	27 of 81	1.89 | 4.06 | 4.40	Paradise	195	true
Nisqually River	1983	1982-12-03 23:00	8,000	3.07	34 of 81	2.27 | 4.22 | 4.32	Longmire	65	true
Nisqually River	1984	1984-01-25 05:15	8,020	3.09	33 of 81	2.98 | 8.61 | 9.53	Paradise	115	true
Nisqually River	1985	1985-06-07 13:45	5,380	1.56	53 of 81	2.70 | 3.00 | 3.10	Paradise	96	true
Nisqually River	1986	1986-02-23 22:00	8,180	3.22	29 of 81	2.59 | 4.09 | 4.27	Paradise	136	true
Nisqually River	1987	1986-11-24 07:45	9,830	4.92	20 of 81	5.49 | 7.89 | 10.43	Paradise	53	true
Nisqually River	1988	1987-12-09 22:45	9,200	4.19	21 of 81	1.45 | 1.58 | 2.83	Paradise	65	true
Nisqually River	1989	1988-10-16 14:00	3,980	1.09	65 of 81	3.55 | 5.93 | 7.29	Paradise	0	true
Nisqually River	1990	1990-01-09 15:45	14,500	16.44	6 of 81	3.14 | 5.28 | 7.09	Paradise	58	true
Carbon River	1991	1990-11-24 00:01	13,000	50.59	2 of 82	5.72 | 6.54 | 10.43	Paradise	37	true
Nisqually River	1991	1990-11-24 20:30	11,000	6.66	15 of 81	5.72 | 6.54 | 10.43	Paradise	37	true
Carbon River	1992	1991-11-25 06:00	3,520	1.34	53 of 82	3.02 | 3.79 | 3.79	Paradise	48	true
Nisqually River	1992	1992-01-28 10:00	3,410	0.94	72 of 81	2.50 | 3.00 | 3.29	Paradise	132	true
Carbon River	1993	1993-01-25 14:00	3,280	1.22	59 of 82	3.80 | 5.29 | 5.76	Paradise	127	true
Nisqually River	1993	1993-03-23 06:30	3,440	0.95	71 of 81	2.60 | 2.88 | 3.13	Paradise	120	true
Carbon River	1994	1994-03-03 00:01	1,100	0.53	82 of 82	1.26 | 1.42 | 1.69	Paradise	145	true
Nisqually River	1994	1994-03-03 16:15	2,090	0.67	80 of 81	1.26 | 1.42 | 1.69	Paradise	145	true
Carbon River	1995	1994-10-31 16:45	4,900	2.27	39 of 82	2.85 | 3.25 | 3.95	Paradise	31	true
Nisqually River	1995	1995-01-31 21:00	7,340	2.59	40 of 81	2.10 | 3.66 | 6.13	Paradise	147	true
Nisqually River	1996	1996-02-08 14:00	21,200	92.73	2 of 81	3.20 | 6.92 | 9.85	Paradise	114	true
Carbon River	1996	1996-02-08 20:15	12,000	34.49	3 of 82	3.20 | 6.92 | 9.85	Paradise	114	true
Carbon River	1997	1996-11-28 00:00	4,540	1.98	44 of 82	2.30 | 3.32 | 3.32	Longmire	--	true
Nisqually River	1997	1997-01-01 03:45	8,210	3.24	28 of 81	2.48 | 3.44 | 5.86	Longmire	144	true
Nisqually River	1998	1997-10-30 14:00	8,330	3.34	26 of 81	3.10 | 5.40 | 5.40	Paradise	1	true
Carbon River	1998	1997-10-30 20:00	5,340	2.69	34 of 82	3.10 | 5.40 | 5.40	Paradise	1	true
Carbon River	1999	1998-12-29 21:45	6,900	4.89	22 of 82	3.35 | 7.25 | 8.38	Paradise	135	true
Nisqually River	1999	1998-12-29 23:45	6,350	2.01	47 of 81	3.35 | 7.25 | 8.38	Paradise	135	true
Nisqually River	2000	1999-11-25 18:15	8,750	3.73	23 of 81	5.80 | 6.30 | 6.72	Paradise	23	true
Carbon River	2000	1999-11-25 22:00	6,470	4.15	26 of 82	5.80 | 6.30 | 6.72	Paradise	23	true
Nisqually River	2001	2000-10-01 00:00	2,670	0.78	78 of 81	1.49 | 4.44 | 4.65	Paradise	0	true
Carbon River	2001	2000-10-01 04:15	4,160	1.71	50 of 82	1.49 | 4.44 | 4.65	Paradise	0	true
Nisqually River	2002	2002-01-08 00:30	8,630	3.61	24 of 81	2.20 | 6.30 | 6.83	Paradise	102	true
Carbon River	2002	2002-04-14 07:00	4,330	1.83	48 of 82	1.54 | 2.33 | 2.84	Paradise	198	true
Nisqually River	2003	2003-01-31 09:30	10,800	6.33	17 of 81	5.19 | 7.12 | 7.94	Paradise	69	true
Carbon River	2003	2003-01-31 10:45	7,310	5.72	17 of 82	5.19 | 7.12 | 7.94	Paradise	69	true
Nisqually River	2004	2004-01-29 20:30	4,680	1.30	59 of 81	0.22 | 0.27 | 0.32	DFF	--	true
Carbon River	2004	2004-01-29 20:30	3,390	1.27	56 of 82	0.22 | 0.27 | 0.32	DFF	--	true
Nisqually River	2005	2005-01-18 09:00	8,140	3.18	30 of 81	6.10 | 6.65 | 8.56	Paradise	48	true
Carbon River	2005	2005-01-18 09:15	7,650	6.52	12 of 82	6.10 | 6.65 | 8.56	Paradise	48	true
Nisqually River	2006	2006-01-10 09:00	7,030	2.39	43 of 81	3.18 | 4.31 | 5.18	Paradise	108	true
Carbon River	2006	2006-01-10 09:15	3,510	1.33	54 of 82	3.18 | 4.31 | 5.18	Paradise	108	true
Nisqually River	2007	2006-11-06 17:20	21,800	108.26	1 of 81	11.30 | 13.08 | 15.69	Paradise	0	true
Carbon River	2007	2006-11-06 18:00	14,500	89.86	1 of 82	11.30 | 13.08 | 15.69	Paradise	0	true
Nisqually River	2008	2007-12-03 18:30	8,470	3.47	25 of 81	3.10 | 4.91 | 5.48	DFF	46	true
Carbon River	2008	2008-03-18 06:15	3,130	1.15	63 of 82	0.09 | 0.33 | 0.57	DFF	196	true
Carbon River	2009	2008-11-12 15:00	11,700	30.75	4 of 82	6.90 | 8.60 | 8.86	Paradise	3	true
Nisqually River	2009	2008-11-12 18:30	13,900	14.08	8 of 81	6.90 | 8.60 | 8.86	Paradise	3	true
Nisqually River	2010	2009-10-30 08:45	3,470	0.95	70 of 81	5.71 | 5.71 | 5.71	Paradise	4	true
Carbon River	2010	2009-10-30 10:30	3,180	1.18	62 of 82	5.71 | 5.71 | 5.71	Paradise	4	true
Nisqually River	2011	2011-01-16 11:45	9,020	4.00	22 of 81	5.12 | 5.22 | 9.69	Paradise	108	true
Carbon River	2011	2011-01-16 13:15	7,010	5.10	21 of 82	5.12 | 5.22 | 9.69	Paradise	108	true
Nisqually River	2012	2012-02-22 09:15	5,260	1.51	55 of 81	0.94 | 5.64 | 6.96	DFF	0	true
Carbon River	2012	2012-02-22 09:45	4,960	2.33	38 of 82	0.94 | 5.64 | 6.96	DFF	0	true
Nisqually River	2013	2012-10-29 05:00	3,790	1.04	66 of 81	2.70 | 5.95 | 6.60	Paradise	0	true
Carbon River	2013	2012-11-23 23:45	2,990	1.09	64 of 82	0.60 | 1.10 | 1.76	Paradise	36	true
Carbon River	2014	2013-12-01 20:00	5,550	2.92	31 of 82	3.00 | 3.02 | 3.02	Paradise	22	true
Nisqually River	2014	2014-03-09 09:30	6,090	1.88	48 of 81	2.90 | 2.92 | 3.97	Paradise	155	true
Nisqually River	2015	2014-11-25 13:00	11,500	7.58	11 of 81	3.07 | 6.12 | 7.35	DFF	31	true
Carbon River	2015	2014-11-25 13:45	9,470	13.09	10 of 82	3.07 | 6.12 | 7.35	DFF	31	true
Nisqually River	2016	2015-12-09 01:00	16,700	29.02	4 of 81	1.40 | 4.49 | 5.61	Paradise	44	true
Carbon River	2016	2015-12-09 05:30	10,200	17.31	6 of 82	1.40 | 4.49 | 5.61	Paradise	44	true
Carbon River	2017	2016-10-20 16:15	3,230	1.20	60 of 82	2.34 | 2.48 | 4.33	Paradise	11	true
Nisqually River	2017	2017-03-15 16:15	4,300	1.18	64 of 81	1.17 | 3.76 | 6.96	DFF	148	true
Nisqually River	2018	2017-10-22 03:00	11,400	7.39	12 of 81	1.07 | 5.51 | 6.72	DFF	15	true
Carbon River	2018	2017-10-22 04:30	7,690	6.62	11 of 82	1.07 | 5.51 | 6.72	DFF	15	true
Nisqually River	2019	2018-11-04 09:15	2,110	0.67	79 of 81	0.33 | 0.54 | 0.91	Paradise	4	true
Carbon River	2019	2018-11-04 09:45	2,250	0.82	74 of 82	0.33 | 0.54 | 0.91	Paradise	4	true
Nisqually River	2020	2020-02-07 01:30	14,200	15.22	7 of 81	3.28 | 7.50 | 10.87	Paradise	165	true
Carbon River	2020	2020-02-07 01:30	7,300	5.70	18 of 82	3.28 | 7.50 | 10.87	Paradise	165	true
Nisqually River	2021	2021-01-13 05:00	6,740	2.22	44 of 81	0.27 | 3.62 | 4.84	Paradise	118	true
Carbon River	2021	2021-01-13 05:30	3,370	1.26	57 of 82	0.27 | 3.62 | 4.84	Paradise	118	true
Nisqually River	2022	2021-11-12 15:30	11,300	7.20	13 of 81	2.91 | 8.87 | 9.62	Paradise	13	true
Carbon River	2022	2021-11-12 16:45	7,360	5.83	15 of 82	2.91 | 8.87 | 9.62	Paradise	13	true
Carbon River	2023	2022-11-04 21:30	9,490	13.19	9 of 82	8.25 | 9.21 | 9.43	Paradise	25	true
Nisqually River	2023	2022-11-04 23:30	10,600	6.01	18 of 81	8.25 | 9.21 | 9.43	Paradise	25	true

Peak Flows by Month:

Month	# of Events	% of Events	Avg Peak Flow - Nisqually	Avg Peak Flow - Carbon	Max Peak Flow - Nisqually	Max Peak Flow - Carbon
January	39	23.93%	4,385	2,009	15,000	7,650
February	17	10.43%	4,347	2,471	21,200	12,000
March	8	4.91%	2,339	898	6,090	3,130
April	5	3.07%	558	3,026	2,790	5,560
May	4	2.45%	1,523	848	3,080	1,810
June	2	1.23%	4,560	--	5,380	--
July	0	0.00%	--	--	--	--
August	0	0.00%	--	--	--	--
September	1	0.61%	1,910	--	1,910	--
October	17	10.43%	1,979	3,124	11,400	11,000
November	37	22.70%	3,998	3,802	21,800	14,500
December	33	20.25%	4,586	2,829	17,100	10,200

Flood recurrence interval calculation:

RI = a * e^{b * cfs}

Where:
RI = Flood recurrence interval, years,
a_Nisqually = 0.389194669880461000,
b_Nisqually = 0.000258175232683441,
a_Carbon = 0.347891292665808000,
b_Carbon = 0.000383044069541846, and
cfs = Peak flow in cubic feet per second

These variables are from the best-fit exponential equation of the Weighted 20% Annual Exceedance Probability based on USGS Stream Stats data, last fetched on 11/17/2021.

A big thanks to Kurt Spicer and Mark Mastin at the USGS for providing the raw data for this analysis!