The map
The West on one map
Every reading on the site, placed where it lives: drought by state, storage at each dam, flow at each gauge. Color is condition vs the 5-yr median. Hover a marker for its reading and click through to its page; the table under the map lists every gauge.
Data through Sep 30, 2026
Drought — share of area in D1 or worse
0%50%100%
Storage & flow — vs the 5-yr median
-60%normal+60%
Shapes
reservoir (size = capacity) gauge basin rollup county drought
Gray states aren't tracked here — The Waterline covers the 11 western states. Allocations are a policy percentage, not a place, so they list as a panel.
| Gauge | State | Discharge | vs 5-yr median | As of |
|---|---|---|---|---|
| American River at Fair Oaks | California | 1,830 cfs | +4% | Sep 30, 2026 |
| Bear River near Corinne | Utah | 473 cfs | +66% | Sep 30, 2026 |
| Bighorn River at Kane | Wyoming | 832 cfs | -41% | Sep 30, 2026 |
| Boise River at Glenwood Bridge | Idaho | 389 cfs | -23% | Sep 30, 2026 |
| Carson River near Carson City | Nevada | 13 cfs | -41% | Sep 30, 2026 |
| Colorado River at Lees Ferry | Arizona | 7,940 cfs | -16% | Sep 30, 2026 |
| Colorado River near Cisco | Utah | 2,590 cfs | -27% | Sep 30, 2026 |
| Columbia River at International Boundary | Washington | 65,700 cfs | +3% | Sep 30, 2026 |
| Columbia River at The Dalles | Oregon | 90,800 cfs | -1% | Sep 29, 2026 |
| Dolores River near Cisco | Utah | 240 cfs | +174% | Sep 30, 2026 |
| Green River at Green River | Utah | 3,730 cfs | +56% | Sep 30, 2026 |
| Gunnison River below Gunnison Tunnel | Colorado | 210 cfs | -53% | Sep 30, 2026 |
| Klamath River near Klamath | California | 2,520 cfs | -4% | Sep 30, 2026 |
| Rio Grande at Otowi Bridge | New Mexico | 1,440 cfs | +313% | Sep 30, 2026 |
| Rio Grande Floodway at San Marcial | New Mexico | 1,690 cfs | n/a | Sep 30, 2026 |
| Sacramento River at Bend Bridge | California | 6,150 cfs | -20% | Sep 30, 2026 |
| Sacramento River at Verona | California | 14,800 cfs | 0% | Sep 30, 2026 |
| Salmon River at White Bird | Idaho | 3,650 cfs | +15% | Sep 30, 2026 |
| Salt River near Roosevelt | Arizona | 10,800 cfs | +4,575% | Sep 30, 2026 |
| San Joaquin River near Vernalis | California | 771 cfs | +4% | Sep 30, 2026 |
| San Juan River at Farmington | New Mexico | 3,260 cfs | +372% (3-yr) | Sep 30, 2026 |
| San Juan River near Archuleta | New Mexico | 311 cfs | -47% | Sep 30, 2026 |
| Snake River above Jackson Lake | Wyoming | 230 cfs | -2% | Sep 30, 2026 |
| Snake River at Weiser | Idaho | 9,610 cfs | -3% | Sep 30, 2026 |
| Truckee River at Vista | Nevada | 390 cfs | -2% | Sep 30, 2026 |
| Willamette River at Portland | Oregon | 6,580 cfs | -17% | Sep 29, 2026 |
| Yampa River near Maybell | Colorado | 104 cfs | -24% | Sep 30, 2026 |
Daily mean discharge from USGS, compared with the median for the same date over up to five prior years. Gauges with their own page are linked.