1. A radar system for determining a vertical component of a total hazard factor of a microburst, comprising: means for scanning the atmosphere at an upper altitude and identifying said microburst; means for deriving spatial parameters of a non-circularly symmetric velocity model of said identified microburst; means for determining an upper horizontal outflow velocity of said identified microburst using said non-circularly symmetric velocity model; means for scanning the atmosphere at a lower altitude; means for modifying said spatial parameters of said non-circularly symmetric velocity model to correspond to the shape of said identified microburst at said lower altitude; means for determining a lower horizontal outflow velocity of said identified microburst using said modified non-circularly symmetric velocity model; and means for computing said vertical component of said total hazard factor from said upper horizontal outflow velocity, said lower horizontal outflow velocity, said modified spatial parameters of said non-circularly symmetric velocity model.