Yellowtail Reservoir water level today
Reservoir in Big Horn, Montana · Bighorn River
3,626.46ft
1,105.35 m · NGVD29
Measured · provisional
Below normal for the dateSteady
What this means
Yellowtail Reservoir is 13.54 ft below its full pool of 3,640.00 ft.
It is lower than on Oct 21 in every one of the last 10 years on record.
The lake has risen 0.86 ft in 7 days and risen 3.02 ft in 30 days.
Since 1989, the lowest daily level was 3,502.72 ft (Oct 1991) and the highest 3,888.20 ft (Aug 2007).
Yellowtail Reservoir level chart
Loading chart…
Measured
Normal range for the date (middle 50% of past years)
Full pool
Same date in past years
| Date | Level | vs today |
|---|---|---|
| Oct 21, 2025 | 3,632.95 ft | ▲ 6.49 ft |
| Oct 21, 2024 | 3,633.15 ft | ▲ 6.69 ft |
| Oct 21, 2023 | 3,640.31 ft | ▲ 13.85 ft |
| Oct 21, 2022 | 3,634.71 ft | ▲ 8.25 ft |
| Oct 21, 2021 | 3,630.39 ft | ▲ 3.93 ft |
| Oct 21, 2020 | 3,633.28 ft | ▲ 6.82 ft |
| Oct 21, 2019 | 3,639.98 ft | ▲ 13.52 ft |
| Oct 21, 2018 | 3,634.65 ft | ▲ 8.19 ft |
| Oct 21, 2017 | 3,639.22 ft | ▲ 12.76 ft |
| Oct 21, 2016 | 3,638.37 ft | ▲ 11.91 ft |
Records & details
- Highest
- 3,888.20 ft on Aug 5, 2007
- Lowest
- 3,502.72 ft on Oct 23, 1991
- Records from
- 1989 (37 years of daily data)
- Full pool
- 3,640.00 ft (top of conservation pool, U.S. Army Corps of Engineers)
- Inflow
- 1,670 cfs (47.3 m³/s)
- Outflow
- 1,586 cfs (44.9 m³/s)
- Water temperature
- Not measured here
Weather & wind
This Afternoon69°F · Sunny
Wind E 5 mph
Wind E 5 mph
Tonight49°F · Mostly Clear
Wind SSW 2 to 9 mph
Wind SSW 2 to 9 mph
Thursday74°F · Mostly Sunny
Wind S 5 to 8 mph
Wind S 5 to 8 mph
Thursday Night52°F · Mostly Cloudy
Wind S 7 mph
Wind S 7 mph
Friday70°F · Partly Sunny then Light Rain
Wind SW 7 to 17 mph
Wind SW 7 to 17 mph
Friday Night34°F · Light Rain
Wind WNW 14 to 25 mph
Wind WNW 14 to 25 mph
NOAA National Weather Service forecast for this lake's location, updated 34 min ago.