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Sybsynoptic convergence-rainfall relationships based upon 1971 south Florida data
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1973
[PDF-92.63 MB]
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Description:Convergence-rainfall relationships are studied at subsynoptic scales of motion in relation to Florida convection. These relationships are based upon analyses of three selected thunderstorm cases. Analyses make use of radar and numerous surface wind and rainfall observations which were taken to the south of Lake Okeechobee, Florida, during the summer of 1971. The evolution of convergence, relative vorticity and rainfall is examined at the cloud-scale and at the meso-scale. Convergence-rainfall relationships at these two scales - together with those found for the Florida peninsula ("larger scale") - show the relation which links surface convergences and divergences at different scales with peak rainfall. Maximum surface convergence occurs first at the "larger scale" and it is followed by corresponding maxima at the meso-scale and then at the cloud-scale. After peak rainfall, maximum surface divergence occurs first at the cloud-scale and is followed by mesoscale and then by "larger scale" surface divergences. The findings of this study are discussed in relation to the parameterization and short-range forecasting of convective rainfall.
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Rights Information:CC0 Public Domain
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