Suivi et prévision d'orages Usage des données satellite, radar et foudre

Follow-up and prevision of storms. Use of satellite data, radar and lightning

Météo-France/CNRM CNRM/GMME, 42 av. G. Coriolis, F31057 Toulouse Cedex 1

Auteur de correspondance : Stephane.Senesi@meteo.fr

Abstract

Due to a short notice, outside the author's responsibility, for its writing this paper is short. We describe the use of satellite and radar data in thunderstorm tracking and forecasting in two ways. First, for tracking and characterizing thunderstorm, infrared satellite image may be processed through thresholding and overlap analysis in images time series : the convective nature of the cloud system may be diagnosed from satellite data alone, or using lightning and other data : cloud tracking may allow to anticipate on lightning occurrence. Second, for thunderstorm forecasting, mesoscale analysis may help in triggering forecasting some hours ahead, radar image extrapolation show value only after triggering and at very short lead times, and numerical modelling may take advantage of radar and satellite data for modifying the initial state of the model, leading to realistic simulations.