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 2224.7 ft68.50 m−0.1 ft−0.03 m from todayLikely 224.668.46 to 224.9 ft68.54 mChance of ending 1 ft0.3 m or more higher: under 5%

In 2 weeks · by Nov 9224.7 ft68.50 m−0.1 ft−0.03 m from todayLikely 224.568.42 to 224.9 ft68.55 mChance of ending 1 ft0.3 m or more higher: under 5%

In a month · by Nov 25224.6 ft68.46 m−0.2 ft−0.07 m from todayLikely 224.268.34 to 225.7 ft68.78 mChance of ending 1 ft0.3 m or more higher: 10%

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

Rain, past 7 days: 0.0 in0 mm watershed average
Rain forecast, next 7 days: 0.6 in14 mm normal 1.1 in27 mm

Statistical estimate, not safety, boating, or water-quality advice. For ramps, closures and advisories, check the U.S. Army Corps of Engineers.

Map

Map of Wright Patman Lake with the dam, level gauge and 19 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	224.668.46	224.768.50	224.968.54
Nov 9	224.568.42	224.768.50	224.968.55
Nov 25	224.268.34	224.668.46	225.768.78

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: 1.08 ft0.33 m Assuming the level stays the same was off by 1.52 ft0.46 m
Actual level inside our range: 77% of 430 tests; the range is built to catch 8 in 10
When we said a rise was possible (20–40%): 27% of those 56 times it ended 1 ft0.3 m or more higher

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

Nearby lakes

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

About Wright Patman Lake

Wright Patman Lake is a U.S. Army Corps of Engineers reservoir on the Sulphur River in Bowie and Cass counties, near Texarkana. The dam was completed in 1954 for flood control and water supply. Jim Chapman Lake and Lake Sulphur Springs are upstream in the Sulphur basin.

More: Wikipedia · Texas Water Development Board · U.S. Army Corps of Engineers

Full pool (conservation): 220.6 ft67.24 m
Highest level since 1987: 254.5 ft77.58 m, May 2016
Lowest level since 1987: 220.4 ft67.17 m, Dec 1989
Surface area at normal pool: 20,300 acres8,215 ha
Conservation storage: 122,593 acre-feet151 million m³
Dam: Wright Patman Dam, 1954
River or creek: Sulphur River
County: Bowie
Owner: USACE - Fort Worth District

Elevations are feetmeters above sea level (NGVD29).

Common questions

Is Wright Patman Lake full right now?

On Oct 26 it was 224.8 ft, 2.7 ft below full pool (227.5 ft), holding 100% of its conservation storage.On Oct 26 it was 68.53 m, 0.81 m below full pool (69.34 m), holding 100% of its conservation storage.

Is Wright Patman Lake going up or down?

The middle estimate for Nov 9 is about steady, with an 8 in 10 chance it ends between 224.5 ft and 224.9 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 68.42 m and 68.55 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.