Angler casting for striped bass on Lake Texoma during fall turnover.
Angler casting for striped bass on Lake Texoma during fall turnover.

What Happens During the Fall Turnover?

During the heat of late summer, deep reservoirs like Lake Texoma form three distinct thermal layers: the warm upper epilimnion, the rapidly cooling thermocline (metalimnion), and the frigid, oxygen-depleted hypolimnion near the lake bottom.

As nighttime ambient temperatures dip in September and October, the surface water cools. Water reaches its maximum physical density at 39.2°F (4°C). As the top layer reaches this threshold, it becomes heavier than the water beneath it and begins to sink. When combined with autumnal winds, the entire water column mixes—a limnological event known as the turnover.

The Fishery Impact: Why the Bite Shuts Down Temporarily

Turnover can temporarily frustrate anglers for several reasons:

  • Oxygen Equalization: Before turnover, fish are compressed into a narrow comfort band above the thermocline where water is both sufficiently cool and oxygen-rich. Once the lake turns over, oxygen is uniform throughout the column, allowing shad and striped bass to scatter anywhere from 5 to 65 feet.
  • Debris & Stained Water: Bottom sediments and decaying organic matter rise to the surface, temporarily clouding water clarity, producing a faint sulfur or earthy smell, and scattering schooling gizzard shad.

    • Tournament Winning Adjustments on Texoma

    • Follow the Washita Arm for Clarity: The Red River arm frequently turns over earlier due to shallower depths and higher mineral suspension. If your regular spots near Soldier Creek or Eisenhower State Park are murky, run north into the Washita River arm where clear tributary inflows buffer the turnover effect.
    • Ditch Bottom Rigs for Suspended Baits: Stripers will suspend over deep flats (30 to 45 feet) rather than holding tight to river channel ledges. Dead-sticking 5-inch soft swimbaits or trolling multi-arm umbrella rigs through suspended bait balls outproduces jigging spoons.
    • Watch the Birds: As dying shad struggle with sudden temperature shocks, gulls and terns provide aerial beacons pointing directly to feeding striper schools.