Verification of operational cool-season tornado threat-area forecasts from mesoscale NWP and a probabilistic forecast product
نویسنده
چکیده
Hanstrum et al. (2002) show from proximity soundings that cool-season tornadoes in southern Australia occur in environments characterised by relatively weak, but still positive, buoyancy in the lower troposphere, and strong wind shear from the surface to 1 – 1.5 km. Threshold criteria based on these proximity soundings (hereafter termed ‘proximity thresholds’) showed that a surface to 700 hPa lifted index* (SLI7) less than –0.5° C, and a 10 m – 850 hPa shear greater than 10-2 Aust. Met. Mag. 53 (2004) 269-277
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