Locally intense rains associated with severe local storms. Synoptic and mesoscale conditions

Revista Cubana de Meteorología

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Title Locally intense rains associated with severe local storms. Synoptic and mesoscale conditions
Lluvias localmente intensas asociadas con tormentas locales severas. Condiciones sinópticas y mesoescalares
Creator Peinó Calero, Eric
Varela de la Rosa, Alis
Bermúdez Souza, Yinelys
Severe local storms; locally intense rains; mesoscale

Tormentas locales severas; lluvias localmente intensas; mesoescala

Description From thirty cases of study were determined the synoptic and mesoscale conditions that favored the occurrence of locally intense rains associated with Severe Local Storms (TLS) in the central and eastern regions of Cuba during the rainy season. Five fundamental synoptic configurations were identified characterized by an environment of weak vertical wind shear in the surface layer - 500 hPa and a predominance of high relative humidity values at low levels with a dry layer at medium levels. The analysis of the satellite images, the radar observations and the outputs of the WRF model showed that the convective cells that caused a locally intense rain event in combination with a severe event were characterized by having large centroid echoes in the vertical by above the isotherm of 0ºC and in its dissipation the centroid echoes of maximum reflectivity were below 5 km in height, generated mainly by the interaction of the horizontal convective rolls with the sea breeze front.
A partir de treinta casos de estudio se determinaron las condiciones sinópticas y de mesoescala que favorecieron la ocurrencia de lluvias localmente intensas asociadas con Tormentas Locales Severas (TLS) en las regiones central y oriental de Cuba durante el período lluvioso. Se identificaron cinco configuraciones sinópticas fundamentales caracterizadas por un ambiente de débil cizalladura vertical del viento en la capa superficie- 500 hPa y un predominio de altos valores de humedad relativa en niveles bajos con una capa seca en niveles medios. El análisis de las imágenes de satélite, las observaciones de radar y las salidas del modelo WRF arrojaron que las celdas convectivas que provocaron un evento de lluvia localmente intensa en combinación con un evento severo, se caracterizaron por presentar eco centroides de gran extensión en la vertical por encima de la isoterma de 0ºC y en su disipación los ecos centroides de máxima reflectividad se encontraban por debajo de los 5 km de altura, generados principalmente por la interacción de los rollos convectivos horizontales con el frente de brisa de mar.
Publisher Instituto de Meteorología

Date 2020-01-01
Type info:eu-repo/semantics/article

Format text/html
Identifier http://rcm.insmet.cu/index.php/rcm/article/view/495
Source Revista Cubana de Meteorología; Vol. 26, Núm. 1 (2020): enero-abril
Revista Cubana de Meteorología; Vol. 26, Núm. 1 (2020): enero-abril
Language spa
Relation http://rcm.insmet.cu/index.php/rcm/article/view/495/793

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