When you first see your flat or point-break climbing past 130°F, you expect a steady rise to the finish line. Then, around 150°F–170°F, the thermometer flat-lines for hours. That flat-line is the stall, a period where the meat's internal temperature barely moves despite a hot fire.
The Core Mechanism: Evaporative Cooling
Moisture inside the brisket (blood, injected liquids, the water naturally trapped in the muscle) begins to seep to the surface. As the surface moisture evaporates, it removes heat, exactly the same way sweat cools your skin on a summer day. The heat loss from evaporation balances the heat the fire is putting into the meat, so the net temperature change is near zero.
Think of the stall as a natural "air conditioner" built into the meat. Until the water source dries out or you change the conditions, the brisket will hold at roughly 150–170°F.



