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Lake Elwell and Tiber water level

Lake, Montana, United States

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Right now

High for mid-October

Surface elevation

2,987.24ft Down 0.25 ft over the last 7 days

Water stored
819,893 acre‑ft
2,980 2,983 2,985 2,988

History

History
2,9802,9832,9852,988ftOct 14Oct 15Oct 16Oct 17Oct 192,9802,9832,9852,988ftOct 14Oct 16Oct 19
2,9802,985ftSep 21Sep 28Oct 5Oct 12Oct 192,9802,985ftSep 21Oct 5Oct 19
2,9802,990ftOct 2025Jan 2026Apr 2026Jul 2026Oct 20262,9802,990ftOct 2025Apr 2026Oct 2026
2,9802,9903,000ftOct 2016Apr 2019Oct 2021Apr 2024Oct 20262,9802,9903,000ftOct 2016Oct 2021Oct 2026
2,9802,990ftJanMarMayJulSepNov20262,9802,990ftJanAprJulOct2026

202120222023202420252026

Surface elevation Normal range (10–90 %)

What this means

Lake Elwell and Tiber is above normal at 2,987.24 ft.

That puts it 2.04 ft above the median of 2,985.20 ft for mid-October, based on 36 years of readings. A year ago it stood at 2,980.10 ft (+7.14 ft).

It has dropped 0.25 ft over the past week. In the last month it has stayed between 2,987.24 ft and 2,988.23 ft.

Lakes and reservoirs often sit lower in fall after a summer of evaporation and use, and recover with winter rain and spring snowmelt.

Compared with 36 years of daily readings for this time of year. How to read levels

Key numbers

Median for this date
2,985.20 ft2.04 ft above the median for this date
Normal for this date
2,980.14 ft – 2,987.57 ft8 years in 10 fall in this range (36 years of records)
Same day last year
2,980.10 ft+7.14 ft
Lowest and highest in 30 days
2,987.24 ft – 2,988.23 ft
Lowest and highest in 12 months
2,979.56 ft – 2,993.72 ft

On the water at Lake Elwell and Tiber

With the level a bit above normal, expect a shoreline slightly higher up than usual and the odd floating branch.

Wear a life jacket on the water. Most boating deaths involve people who were not wearing one.

Weather at the gauge

No rain in the last 3 days.

20 Tue 58° 38° – Wind 11 mph
21 Wed 64° 38° – Wind 11 mph
22 Thu 71° 50° – Wind 9 mph
23 Fri 58° 38° 0.28 in, 76% Wind 28 mph
24 Sat 44° 34° – Wind 18 mph
25 Sun 39° 30° – Wind 10 mph
26 Mon 41° 29° – Wind 6 mph

Forecast: Open-Meteo

Sunrise 07:52 AM Sunset 06:27 PM Daylight 10 hr, 35 min Waxing gibbous 71%

Map

Nearby gauges

Gauge Level Compared with normal 24 hours Distance
Marias River near Chester MTRiver gauge, Marias River 515 cfs Normal ±0 1.0 mi
Willow Creek near GalataRiver gauge, Willow Creek 0.0 cfs Normal ±0 15 mi
Marias River near Loma MTRiver gauge, Marias River 497 cfs Normal +13.0 cfs 35 mi
Marias River near Shelby MTRiver gauge, Marias River 2.83 ft Below flood stage +0.01 ft 37 mi
Teton River at Loma MTRiver gauge, Teton River 2.21 ft No reference yet +0.01 ft 38 mi
Missouri River at Fort Benton MTRiver gauge, Missouri River 2.02 ft Below flood stage +0.04 ft 40 mi
Missouri River at Virgelle MTRiver gauge, Missouri River 2.98 ft Below flood stage −0.03 ft 44 mi

Questions and answers

How does Lake Elwell and Tiber compare with last year?

It is 7.14 ft higher than on the same day last year, when the reading was 2,980.10 ft.

What is a normal level for Lake Elwell and Tiber in mid-October?

The median for mid-October is 2,985.20 ft. In 8 years out of 10 the reading falls between 2,980.14 ft and 2,987.57 ft, based on 36 years of records.

Is Lake Elwell and Tiber really 2,987.24 ft deep?

No. 2,987.24 ft is the height of the water surface above sea level (or the agency's vertical datum), not the depth of the water.

What is the water level of Lake Elwell and Tiber today?

On Oct 19, 2026, the surface elevation was 2,987.24 ft. Down 0.25 ft over the last 7 days.

Is Lake Elwell and Tiber rising or falling?

Down 0.25 ft over the last 7 days.

Is the level of Lake Elwell and Tiber normal?

High for mid-October. Compared with 36 years of daily readings for this time of year.

How often is this data updated?

The U.S. Bureau of Reclamation publishes a new reading once a day. This page refreshes within minutes of each update.

For specialists

Station codes, datum, parameters, data quality and downloads
Operator
U.S. Bureau of Reclamation
Station code
usbr:396 (Agency page)
Coordinates
48.31830, -111.09080 (WGS84)
Update interval
once a day
Licence
Public domain. Data: U.S. Bureau of Reclamation (RISE), provisional data subject to revision

Published series

ParameterLast valueTime (UTC)Quality
Surface elevation 2,987.24 ft 2026-10-19 06:00 Provisional
Water stored 819,893 acre‑ft 2026-10-19 06:00 Provisional

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How to cite

U.S. Bureau of Reclamation: Lake Elwell and Tiber (usbr:396). Accessed October 20, 2026 via Nivelmap, https://nivelmap.com/en/united-states/montana/lake-elwell-and-tiber

How we check values

Each reading is stored as published. We hold back values that jump faster than physically plausible and show the measurement time with every value.