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 2532.6 ft162.34 m−0.1 ft−0.02 m from todayLikely 532.5162.29 to 532.9 ft162.42 mChance of ending 1 ft0.3 m or more higher: under 5%

In 2 weeks · by Nov 9532.5 ft162.30 m−0.2 ft−0.05 m from todayLikely 532.3162.23 to 533.2 ft162.53 mChance of ending 1 ft0.3 m or more higher: under 5%

In a month · by Nov 25532.5 ft162.31 m−0.1 ft−0.04 m from todayLikely 532.0162.15 to 535.4 ft163.19 mChance of ending 1 ft0.3 m or more higher: 20%

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 in1 mm watershed average
Rain forecast, next 7 days: 0.7 in18 mm normal 0.9 in22 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 Grapevine Lake with the dam, level gauge and 15 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	532.5162.29	532.6162.34	532.9162.42
Nov 9	532.3162.23	532.5162.30	533.2162.53
Nov 25	532.0162.15	532.5162.31	535.4163.19

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: 0.75 ft0.23 m Assuming the level stays the same was off by 1.08 ft0.33 m
Actual level inside our range: 80% of 432 tests; the range is built to catch 8 in 10
When we said a rise was possible (20–40%): 36% of those 44 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.

Downstream

Lake Livingston129.2 ft39.37 m · 91%

Nearby lakes

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

About Grapevine Lake

Grapevine Lake is a U.S. Army Corps of Engineers reservoir on Denton Creek, about 20 miles northwest of Dallas next to the city of Grapevine. It was impounded in 1952, mainly for flood control and municipal water supply. Denton Creek flows on to the Elm Fork of the Trinity River.

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

Full pool (conservation): 535.0 ft163.07 m
Highest level since 1989: 563.0 ft171.60 m, Jun 2015
Lowest level since 1989: 521.8 ft159.04 m, Dec 2006
Surface area at normal pool: 7,380 acres2,987 ha
Conservation storage: 163,064 acre-feet201 million m³
Dam: Grapevine Dam, 1952
River or creek: Denton Creek
County: Tarrant
Owner: USACE - Fort Worth District

Elevations are feetmeters above sea level (NGVD29).

Common questions

Is Grapevine Lake full right now?

On Oct 26 it was 532.6 ft, 2.4 ft below full pool (535.0 ft), holding 91% of its conservation storage.On Oct 26 it was 162.35 m, 0.72 m below full pool (163.07 m), holding 91% of its conservation storage.

Is Grapevine Lake going up or down?

The middle estimate for Nov 9 is down about 0.2 ft, with an 8 in 10 chance it ends between 532.3 ft and 533.2 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 down about 0.05 m, with an 8 in 10 chance it ends between 162.23 m and 162.53 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.