Missouri Basin and Arkansas-Rio Grande-Texas Gulf Regions

Notice: A map-based version currently in development will be released soon.

Reservoir	Location	% Full	SWE % of Avg	Full Capacity (kaf)	Total Capacity (kaf)	Outflow (cfs)
Angostura Reservoir	SD	76	n/a	123	123	3
Alcova Reservoir	WY	98	n/a	184	184	1723
Lake Altus	OK	64	n/a	129	149	0
Lake Alice Reservoir	NE	54	n/a	11	11	n/a
Arbuckle Reservoir	OK	119	n/a	72	108	n/a
Buffalo Bill Reservoir	WY	59	96	647	647	1437
Bighorn Lake (Yellowtail)	MT	81	0	1011	1279	1962
Box Butte Reservoir	NE	51	n/a	29	29	n/a
Belle Fourche Reservoir	SD	87	n/a	173	173	0
Bull Lake Reservoir	WY	27	89	152	152	56
Bonny Lake	CO	0	n/a	41	170	4
Boysen Reservoir	WY	69	98	742	893	952
Calamus Reservior	NE	95	n/a	127	127	n/a
Carter Lake Reservoir	CO	93	n/a	112	112	n/a
Cedar Bluff Reservoir	KS	38	n/a	172	364	0
Choke Canyon Reservoir	TX	14	n/a	695	695	n/a
Clark Canyon Reservoir	MT	84	77	174	253	65
Canyon Ferry Lake	MT	79	88	1892	1993	4356
Cheney Reservoir	KS	63	n/a	167	248	n/a
Fort Cobb Reservoir	OK	94	n/a	74	136	n/a
Davis Creek Reservoir	NE	59	n/a	31	31	n/a
Deerfield Reservoir	SD	95	n/a	16	16	18
E. A. Patterson Lake	ND	89	n/a	9	9	0
Enders Reservoir	NE	19	n/a	43	73	2
Flatiron Reservoir	CO	20	n/a	1	1	n/a
Foss Reservoir	OK	90	n/a	169	350	n/a
Fresno Reservoir	MT	46	n/a	93	93	43
Gibson Reservoir	MT	37	52	99	99	265
Glendo Reservoir	WY	71	59	517	789	596
Lake Granby	CO	70	n/a	540	540	76
Green Mountain Reservoir	CO	37	n/a	154	154	124
Gray Reef Reservoir	WY	85	n/a	2	2	1745
Guernsey Reservoir	WY	63	n/a	46	46	231
Hugh Butler Lake (Red Willow Dam)	NE	42	n/a	36	85	2
Harlan County Lake	NE	75	n/a	314	814	0
Hebgen Lake	MT	81	80	386	400	778
Horsetooth Reservoir	CO	94	n/a	157	157	105
Harry Strunk Lake (Medicine Creek)	NE	102	n/a	36	88	55
Helena Valley Reservoir	MT	96	n/a	10	10	n/a
Jamestown Reservoir	ND	103	n/a	32	221	314
Keyhole Reservoir	WY	62	n/a	189	329	0
Kortes Reservoir	WY	100	n/a	5	5	1756
Keith Sebelius Lake (Norton Dam)	KS	45	n/a	35	134	1
Kirwin Reservoir	KS	48	n/a	98	313	0
Little Lake Alice Reservoir	NE	33	n/a	1	1	n/a
Lake Elwell (Tiber Reservoir)	MT	75	82	926	1329	412
Lima Reservoir	MT	80	63	84	100	3
Lake Minatare Reservoir	NE	43	n/a	59	59	n/a
Lake Tschida	ND	89	n/a	67	214	0
Lovewell Reservoir	KS	93	n/a	36	86	0
Marys Lake	CO	57	n/a	1	1	29
McGee Creek	OK	105	n/a	114	199	n/a
Merritt Reservoir	NE	94	n/a	67	67	n/a
Lake Nasworthy	TX	86	n/a	11	12	n/a
Nelson Reservoir	MT	94	n/a	79	79	44
Lake Thunderbird (Norman Dam)	OK	152	n/a	106	177	n/a
Lake Estes (Olympus Dam)	CO	70	n/a	3	3	130
Pathfinder Reservoir	WY	54	n/a	1070	1070	1688
Pilot Butte Reservoir	WY	86	n/a	34	34	0
Pinewood Reservoir	CO	35	n/a	2	2	5
Pipestem Lake	ND	194	n/a	9	142	12
Pishkun Reservoir	MT	73	n/a	47	47	n/a
Pactola Reservoir	SD	85	n/a	56	99	32
Pueblo Reservoir	CO	71	n/a	323	350	n/a
Ruedi Reservoir	CO	68	n/a	102	102	112
Lake Meredith (Sanford Dam)	TX	27	n/a	896	1358	n/a
Seminoe Reservoir	WY	47	83	1017	1017	1758
Shadow Mountain Reservoir	CO	91	n/a	18	18	256
Lake Sherburne	MT	79	80	66	66	185
Shadehill Reservoir	SD	75	n/a	120	350	21
Swift Reservoir	MT	n/a	n/a	30	36	n/a
Tom Steed Reservoir (Mtn Park Dam)	OK	92	n/a	97	117	n/a
Swanson Lake (Trenton Dam)	NE	56	n/a	110	244	1
Twin Buttes Reservoir	TX	15	n/a	186	640	n/a
Turquoise Lake (Sugarloaf Dam)	CO	61	n/a	129	129	n/a
Twin Lakes Reservoir	CO	75	n/a	141	141	n/a
Waconda Lake (Glen Elder Dam)	KS	71	n/a	219	942	12
Webster Reservoir	KS	18	n/a	76	259	0
Winters Creek Reservoir	NE	39	n/a	3	3	n/a
Willow Creek Reservoir	MT	50	n/a	32	32	0
Willow Creek Reservoir	CO	79	n/a	11	11	7

Last Updated: 5/ 3/2025