Outlook

Middle estimate, with the range the level has an 8 in 10 chance of landing in. The bars share one scale: change from today.

Next week · by Nov 2824.8 ft251.40 m0.0 ft+0.01 m from todayLikely 824.6251.34 to 824.9 ft251.44 mChance of ending 1 ft0.3 m or more higher: under 5%

In 2 weeks · by Nov 9824.8 ft251.41 m+0.1 ft+0.02 m from todayLikely 824.6251.35 to 825.0 ft251.45 mChance of ending 1 ft0.3 m or more higher: under 5%

In a month · by Nov 25824.8 ft251.39 m0.0 ft+0.01 m from todayLikely 824.6251.34 to 825.2 ft251.51 mChance of ending 1 ft0.3 m or more higher: under 5%

Rises are harder to call. Heavy rain in the watershed can push the lake above these ranges within days.

Rain, past 7 days: 0.3 in9 mm watershed average
Rain forecast, next 7 days: 1.2 in30 mm normal 0.4 in11 mm

Statistical estimate, not safety, boating, or water-quality advice. For ramps, closures and advisories, check the lake operator.

Map

Map of Lake LBJ with the dam, level gauge and 5 public boat ramps.

Dam
Level gauge
Public boat ramp

Ramp locations from Texas Parks and Wildlife. Whether a ramp is open depends on the lake level; check the operator.

Level and outlook

FeetMeters above sea level

Measured
Middle estimate
8 in 10 range
Full pool

Show outlook as a table

Date	Low end	Middle	High end
Nov 2	824.6251.34	824.8251.40	824.9251.44
Nov 9	824.6251.35	824.8251.41	825.0251.45
Nov 25	824.6251.34	824.8251.39	825.2251.51

How well this outlook has done here

We tested the 2-week outlook on past years at this lake, as if made once a week with only what was known that day.

On average it was off by: 0.14 ft0.04 m Assuming the level stays the same was off by 0.15 ft0.05 m
Actual level inside our range: 92% of 432 tests; the range is built to catch 8 in 10

The rise chance uses the same threshold for every lake: 1 ft (0.3048 m).

Connected lakes

Water from upstream lakes flows into this one; water released here flows on downstream.

Upstream

Inks Lake887.3 ft270.44 m · 96%

Downstream

Lake Marble Falls736.7 ft224.53 m · 97%

Nearby lakes

Closest lakes in a straight line, with today's level.

About Lake LBJ

Lake LBJ (Lake Lyndon B. Johnson) is a Highland Lakes reservoir on the Colorado River about 45 miles northwest of Austin. It was formed in the early 1950s by Wirtz Dam, originally called Granite Shoals Dam, built by the Lower Colorado River Authority. The Llano River joins the Colorado in the northern part of the lake at Kingsland. Inks Lake is upstream and Lake Marble Falls is just downstream.

More: Wikipedia · Texas Water Development Board

Full pool (conservation): 825.0 ft251.46 m
Highest level since 1952: 828.0 ft252.37 m, Sep 1952
Lowest level since 1952: 793.8 ft241.95 m, Nov 1970
Surface area at normal pool: 6,534 acres2,644 ha
Conservation storage: 112,778 acre-feet139 million m³
Dam: Wirtz Dam, 1951
River or creek: Colorado River
County: Burnet
Owner: Lower Colorado River Authority

Elevations are feetmeters above sea level (NAVD88).

Common questions

Is Lake LBJ full right now?

On Oct 26 it was 824.8 ft, 0.2 ft below full pool (825.0 ft), holding 99% of its conservation storage.On Oct 26 it was 251.39 m, 0.07 m below full pool (251.46 m), holding 99% of its conservation storage.

Is Lake LBJ going up or down?

The middle estimate for Nov 9 is about steady, with an 8 in 10 chance it ends between 824.6 ft and 825.0 ft. The chance it ends 1 ft or more higher than today is under 5%. Heavy rain can change that quickly.The middle estimate for Nov 9 is about steady, with an 8 in 10 chance it ends between 251.35 m and 251.45 m. The chance it ends 0.3 m or more higher than today is under 5%. Heavy rain can change that quickly.

Where does this data come from?

Daily levels come from the Texas Water Development Board and lake operators. The outlook is our own statistical model, using recent levels and forecast rain over the watershed.