Precipitation growth at a cold front

descriptionPublicationkeyboard_double_arrow_right Article 01 Apr 1973Publisher:WileyJournal:Quarterly Journal of the Royal Meteorological Society, volume 99, pages 252-259 (issn: 0035-9009, eissn: 1477-870X,

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Authors: P. R. Jonas; R. C. Tabony;

doi: 10.1256/smsqj.42003 , 10.1002/qj.49709942004

Precipitation growth at a cold front

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Abstract

AbstractA simple model of the growth of precipitation particles in cloud systems in which the air flow is known has been used to calculate the growth of hail pellets at a cold front. The calculated pellet sizes and densities, and surface rainfall rates, are consistent with observations. It is shown that in the 3 km deep frontal cloud the larger hail pellets were grown during at least two ascents in the strong updraught. The growth of large pellets depends on the airflow being such as to cause two ascents, and small changes in the airflow can prevent the growth of large hail pellets.

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