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contributor authorSheridan, Scott C.
contributor authorGriffiths, John F.
contributor authorOrville, Richard E.
date accessioned2017-06-09T14:53:21Z
date available2017-06-09T14:53:21Z
date copyright1997/09/01
date issued1997
identifier issn0882-8156
identifier otherams-2900.pdf
identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4166179
description abstractThis study examines the relationship between cloud-to-ground (CG) lightning and surface precipitation using observations from six regions (each on the order of 10000 km2), April through October (1989?93), in the south-central United States. The relationship is evaluated using two different methods. First, regression equations are fit to the data, initially for only the CG lightning flash density and precipitation, and then with additional atmospheric and lightning parameters. Second, days are categorized according to differences in the precipitation-to-CG lightning ratio; the same additional parameters are then examined for differences occurring within each category. Results show that the relationship between CG lightning and surface precipitation is highly variable; r2 coefficients range from 0.121 in Baton Rouge to 0.601 in Dallas. A measure of the positive CG lightning flash density is the best addition to the model, statistically significant in all regions. When days are categorized, the percentage of lightning that is positive shows the most significant differences between categories, ranging from <4% on days with a ?low? precipitation-to-CG lightning ratio, to 12%?36% on days with a ?high? ratio. Other lightning parameters give less significant results; however, three atmospheric parameters (CAPE, lifted index, and Showalter index) do show a significant trend suggesting that there is much less instability in the atmosphere on ?high? ratio days than on ?low? ratio days.
publisherAmerican Meteorological Society
titleWarm Season Cloud-to-Ground Lightning–Precipitation Relationships in the South-Central United States
typeJournal Paper
journal volume12
journal issue3
journal titleWeather and Forecasting
identifier doi10.1175/1520-0434(1997)012<0449:WSCTGL>2.0.CO;2
journal fristpage449
journal lastpage458
treeWeather and Forecasting:;1997:;volume( 012 ):;issue: 003
contenttypeFulltext


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