An investigation into the Nimrod convective gust algorithm
Hand W.H.
An analysis of the components comprising the operational Nimrod convective wind gust algorithm has been carried out on 6 cases representing a variety of synoptic types in all seasons. Wind gusts have been compared objectively and subjectively with observations over the UK and a number of shortcomings have been identified. Two alternative but similar methods have been tested on the same sample giving improved results. One method uses the wet-bulb freezing level to estimate the origin of the convective downdraught and the other is a subtle variation of the present Nimrod technique. Although both of the new methods are not perfect, a recommendation has been made that one or both of them be trialled on Nimrod with a view to improving wind gust diagnoses.
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