Major river flooding expected, Lake Travis rising into flood pool

Weather Blog
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4-10 inches of rain in the Austin area has resulted in a major flood on Barton Creek at Loop 360, the Colorado River at Bastrop, and Onion Creek at Hwy. 183. See the details and impacts below.

Lake Travis was 100% full Friday at 681 feet above sea level, but will rise up to 4 feet this weekend, and be back into the flood pool for the first time since the October floods.

From the LCRA:

The Highland Lakes are full.  LCRA is releasing storm runoff through hydroelectric generation at all of the Highland Lakes, including Buchanan, Inks, Wirtz, Starcke, Mansfield and Tom Miller dams.  Conditions are changing rapidly with continuing rainfall and increasing inflows to Lake Travis and the Colorado River downstream of Mansfield Dam. LCRA is closely monitoring conditions and encourages the public to remain alert to local conditions and be prepared to take protective actions.

At Mansfield Dam, Lake Travis is forecast to rise to about 683 to 685 feet msl by Sunday.  Releases will be increased with additional hydroelectric generation at Mansfield Dam to pass the water through Lake Travis after flood conditions improve downstream of the dam.

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Here’s the latest information on the current flooding situation:

People on Greenbelt should STAY OUT of Barton Creek. It is dangerous when flooding.

MAJOR FLOOD ON BARTON CREEK AT LOOP 360 (Pool will  be flooded and closed)

MAJOR FLOOD ON ONION CREEK

MAJOR FLOOD ON COLORADO RIVER AT BASTROP – homes threatened

FLOOD GATE PARTIALLY OPEN ON TOM MILLER DAM WILL BE SENDING FASTER WATER THROUGH LADY BIRD LAKE AND DOWNSTREAM…

Flood Warnings are in effect for several area creeks and rivers. While the flooding is expected to be minor on most creeks and rivers, MODERATE FLOODING is forecast for the Pedernales River. MAJOR FLOODING is forecast Onion Creek, Barton Creek and the Colorado River at Bastrop this weekend. Stay away from Barton Creek if in the greenbelt this weekend. The flow will be dangerous. Barton Springs Pool is flooding and will be closed this weekend.

FLOOD WARNING COLORADO RIVER…Forecast flooding increased from Minor to Major severity…

The flood warning continues for

the Colorado River At Bastrop.

* from Saturday morning to Monday morning…or until the warning is cancelled.

* At 12:45 AM Saturday the stage was 11.7 feet.

* Flood stage is 23.0 feet.

* Major flooding is forecast.

* Forecast…Rise above flood stage by late Saturday morning and continue to rise to

  near 29.5 feet early Sunday morning. .The river will fall below flood

  stage by sunday evening.

* Impact…At 29.0 feet…Lowest homes in the Doty River, Hidden Valley and

  Pecan Shores subdivisions above Smithville flood. Many primary and secondary

  roads and bridges flood and are very dangerous to motorists. Livestock and

  equipment should be moved from the flood plain.

FLOOD WARNING BARTON CREEK…

The flood warning continues for

  the Barton Creek At Loop 360.

* At midnight Friday the stage was 7.9 feet.

* Flood stage is 8.0 feet.

* Major flooding is forecast.

* Forecast…rise above flood stage later this morning and continue

  to rise to near 21.1 feet. The river will fall below flood stage

  Saturday afternoon.

* Impact…At 22.0 feet…The Barton Creek flood plain is very dangerous. Travel

  should be prohibited on streets and bridges that cross the flood plain. Barton

  Springs Pool will be severely impacted with major damage.

  Lowest residences are threatened…

FLOOD WARNING FOR PEDERNALES RIVER…

…Forecast flooding increased from Minor to Moderate severity…

The flood warning continues for

the Pedernales River At Johnson City.

* until late Saturday night…or until the warning is cancelled.

* At 10:00 PM Friday the stage was 14.3 feet.

* Flood stage is 14.0 feet.

* Minor flooding is occurring and Moderate flooding is forecast.

* Forecast…The river will continue rising to near 18.6 feet by after midnight

  tomorrow. The river will fall below flood stage tomorrow afternoon.

* Impact…At 19.0 feet…Major flooding makes secondary and primary roads below

  Stonewall to Lake Travis very dangerous. Low park areas downstream in

  Pedernales Falls State Park flood.

FLOOD WARNING ONION CREEK…

…Forecast flooding increased from Moderate to Major severity…

The flood warning continues for

the Onion Creek At Hwy 183.

* until late tonight…or until the warning is cancelled.

* At  1:20 AM Saturday the stage was 20.3 feet.

* Flood stage is 17.0 feet.

* Minor flooding is occurring and Major flooding is forecast.

* Forecast…The river will continue rising to near 29.3 feet this morning.

  The river will fall below flood stage this afternoon. This crest is about

  10 feet less than the crest of 39.2 feet back on October 30, 2015.

* Impact…At 29.0 feet…Major flooding impacts several neighborhoods along

  Onion Creek. Homes on Pinehurst Drive and Champions Lane are threatened by

  flood waters. Portions of Timber Creek, Onion Creek Forest, Onion Creek

  Plantations, and Yarrabee Bend South subdivisions are flooded. Major portions

  of Bluff Springs Road, East William Cannon Drive and Brandt Road near Onion

  Creek are flooded, and Burleson Road begins to flood near Richard Moya Park….

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