Dual-Doppler Observation of a Tornadic Storm

Peter S. Ray National Severe Storms Laboratory, NOAA, Norman, Okla. 73069

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R. J. Doviak National Severe Storms Laboratory, NOAA, Norman, Okla. 73069

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G. B. Walker National Severe Storms Laboratory, NOAA, Norman, Okla. 73069

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D. Sirmans National Severe Storms Laboratory, NOAA, Norman, Okla. 73069

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J. Carter National Severe Storms Laboratory, NOAA, Norman, Okla. 73069

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B. Bumgarner National Severe Storms Laboratory, NOAA, Norman, Okla. 73069

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Abstract

On 20 April 1974 a tornadic storm passed between the two NSSL Doppler radars spaced about 42 km apart. Both radars simultaneously collected Doppler data throughout the storm. Air motions synthesized from these data provide the first three-dimensional display of Doppler-derived wind fields in a tornadic storm. Cyclonic circulation, associated with the tornado, and regions of intense up- and down-drafts are clearly evident.

Abstract

On 20 April 1974 a tornadic storm passed between the two NSSL Doppler radars spaced about 42 km apart. Both radars simultaneously collected Doppler data throughout the storm. Air motions synthesized from these data provide the first three-dimensional display of Doppler-derived wind fields in a tornadic storm. Cyclonic circulation, associated with the tornado, and regions of intense up- and down-drafts are clearly evident.

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