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  • Author or Editor: Charles A. Doswell III x
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Charles A. Doswell III

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Charles A. Doswell III

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A method is developed for designing specific filtering properties into a weighted-average interpolation scheme. Both spatial and temporal filtering are simultaneously accomplished, resulting in good time continuity as well as smooth spatial patterns. Both low-pass and band-pass filters are shown, with the band-pass results designed to emphasize details of the fields at the resolution limits for conventional surface data. These filters are applied to surface data on a severe thunderstorm day in Oklahoma. Results suggest that divergence fields calculated from the filtered data are well correlated with severe weather events, which develop only after several hours of preexisting moisture convergence.

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Charles A. Doswell III

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Robert A. Maddox and Charles A. Doswell III

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Three cases of widespread and persistent intense convective storms are examined. It is shown that synoptic-scale meteorological settings attending these events did not fit classic severe storm patterns that have been extensively documented in the literature. The analyses suggest that lower-tropospheric warm advection dominated mid-tropospheric differential vorticity advection in forcing upward vertical motion that triggered and organized the convective events. It is hypothesized that by shifting attention from the 500 mb level to observed and forecast low-level warm advection, the operational forecaster might better anticipate organized, intense convective outbreaks that develop within relatively benign synoptic-scale settings.

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Martin Setvák and Charles A. Doswell III

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Charles A. Doswell III and Joseph T. Schaefer

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Charles A. Doswell III and Stanley L. Barnes

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Charles A. Doswell III and Joseph T. Schaffer

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