Cooked boundaries are hypothesized to occur when insolation or moisture pooling is present. Incident radiation acting in the vicinity of a preexisting outflow airmass will begin to mix the lowest portion of the atmosphere, which begins to dry and warm the airmass. Due to the rate of boundary layer thermal growth, the preexisting outflow airmass warms and dries significantly slower than the synoptic-scale airmass in which it is embedded. After a period of time the preexisting outflow airmass is cooler but more moist, which leads to a cooked boundary. Moisture pooling produces a cooked boundary when an excess of moisture is transported near the boundary by converging flow. This localized area of high moisture creates high CAPE values in the preexisting outflow airmass.
The aforementioned hypotheses are being tested through sensitivity studies conducted using the two-dimensional Advanced Regional Prediction System (ARPS) model. The parameter space used to test the ability of solar insolation to form a cooked boundary includes the coldness of the outflow boundary, low-level shear, incident solar radiation, and soil moisture. The same parameters except incident radiation were used to test the moisture pooling hypothesis. Results will be presented at the conference.