Cloud-to-Ground Lightning and Upper-Air Patterns during Bursts and Breaks in the Southwest Monsoon

Watson, Andrew I.; Holle, Ronald L.; López, Raúl E.

doi:10.1175/1520-0493(1994)122<1726:ctglau>2.0.co;2

Cited by 33 publications

(37 citation statements)

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“…Intraseasonal variability in lightning activity associated with the MJO is manifested as a northwardpropagating mode akin to northward surges in monsoon activity (e.g., Watson et al 1994). Intraseasonal variability in lightning activity associated with the MJO is manifested as a northwardpropagating mode akin to northward surges in monsoon activity (e.g., Watson et al 1994).…”

Section: Resultsmentioning

confidence: 99%

“…Although synoptic conditions conducive to lightning activity vary widely across the continental United States, the fundamental atmospheric ingredients necessary for enhanced lightning activity include a convectively unstable midtroposphere (e.g., Burrows et al 2005). Watson et al (1994) found that lightning activity over the desert Southwest is enhanced coincident with synoptic conditions associated with surges in the North American monsoon. Watson et al (1994) found that lightning activity over the desert Southwest is enhanced coincident with synoptic conditions associated with surges in the North American monsoon.…”

Section: Introductionmentioning

confidence: 99%

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Influence of the Madden–Julian Oscillation on Summertime Cloud-to-Ground Lightning Activity over the Continental United States

Abatzoglou

Brown

2009

Monthly Weather Review

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Summertime cloud-to-ground lightning strikes are responsible for the majority of wildfire ignitions across vast sections of the seasonally dry western United States. In this study, a strong connection between active phases of the Madden-Julian oscillation (MJO) and regional summertime lightning activity was found across the interior western United States. This intraseasonal mode of lightning activity emanates northward from the desert Southwest across the Great Basin and into the northern Rocky Mountains. The MJO is shown to provide favorable conditions for the northward propagation of widespread lightning activity through the amplification of the upper-level ridge over the western United States and the development of midtropospheric instability. Given the relative predictability of the MJO with long lead times, results allude to the potential for intraseasonal predictability of lightning activity and proactive fire management planning.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of the Madden–Julian Oscillation on Summertime Cloud-to-Ground Lightning Activity over the Continental United States

Abatzoglou

Brown

2009

Monthly Weather Review

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“…Watson et al (1994) used lightning data as an indicator of the convective activity to study the southwestern U.S. monsoon as related to upper-air characteristics. Lericos et al (2002) used NLDN data to study the cloud-to-ground lightning over the entire Florida peninsula and the surrounding seas during the warm season when synoptic forcing is relatively weak.…”

Section: Introductionmentioning

confidence: 99%

Storms and Lightning Activity in Greece during the Warm Periods of 2003–06

Mazarakis

Kotroni

Lagouvardos

et al. 2008

Journal of Applied Meteorology and Climatology

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Lightning activity over Greece during the warm season (May-September) of the years 2003-06 is investigated in relation to the synoptic meteorological conditions that prevailed in the region. The study is based on the use of cloud-to-ground lightning activity data from the Met Office Arrival Time Difference system and upper-air analyses from the European Centre for Medium-Range Weather Forecasts. Analysis of the spatial variability of lightning shows that the highest "relative" flash densities are observed in northern and western Greece and in central and western Peloponnissos. The relative flash density is correlated with elevation: it increases with elevation along the slopes of terrain features. The study of the synoptic patterns related to lightning is based on the analysis of 60 active days and 60 inactive days in terms of lightning activity over Greece. The days with high lightning activity are characterized by a short-wave trough at the 500-hPa level over the Ionian Sea. On the other hand, during the days with no lightning, a northwest flow prevails over Greece. It was also found that high lightning activity is related to high values of absolute vorticity, equivalent potential temperature, and convective available potential energy.

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“…De maneira geral, observa-se no histograma a predominância de descargas negativas durante todo o período de acompanhamento do sistema, com exceção de alguns períodos na fase da dissipação. Segundo Watson et al (1994) e Macgorman & Burges (1994, as descargas negativas superam as positivas quando as precipitações são predominantemente de água líquida e, quando existe muita precipitação na forma de granizo, as descargas positivas tendem a ocorrer em maior quantidade. Nas cinco horas finais do sistema foi detectada uma descarga por imagem de satélite.…”

Section: Resultsunclassified

Descargas Atmosféricas E Condições Ambientais Associadas a Convecção Profunda: Um Caso De Estudo

Neta

Moreira

Gomes

2015

CeN

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Cloud-to-Ground Lightning and Upper-Air Patterns during Bursts and Breaks in the Southwest Monsoon

Cited by 33 publications

References 0 publications

Influence of the Madden–Julian Oscillation on Summertime Cloud-to-Ground Lightning Activity over the Continental United States

Influence of the Madden–Julian Oscillation on Summertime Cloud-to-Ground Lightning Activity over the Continental United States

Storms and Lightning Activity in Greece during the Warm Periods of 2003–06

Descargas Atmosféricas E Condições Ambientais Associadas a Convecção Profunda: Um Caso De Estudo

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