![]() ![]() Most-Unstable where the temperature and dewpoint used come from a data level in the lowest 300mb that results in the highest Theta-E (θ e), subsequently producing the greatest amount of instability given the conditions.Įffective-Inflow where the parcel assumes the mean temperature and dewpoint of the "Effective Inflow Layer" (the lowest contiguous layer of data levels that result in a conditionally unstable parcel lifted from each respective level).īy default when any product is chosen all images are preloaded, meaning they are downloaded to your browser to enable the ability to animate through the entire forecast. Mean-Layer where the parcel assumes an average or mean temperature and dewpoint from the lowest 100mb AGL (colloquially referred to as a "mixed" layer parcel). Surface-Based where the parcel assumes a temperature and dewpoint taken directly from the surface data values. In brief terms, the four parcel methods we account for can be interpreted in the following manner Different calculations will often result in distinct differences in the amount of positive or negative buoyancy throughout the depth of the profile. The thermodynamic profiles included in forecast soundings are generated using specific methods for calculating the thermodynamic properties of the theoretical parcel that is lifted from the surface. Use this setting to specify a default parcel type for forecast soundings.
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