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www.adv-geosci.net/7/279/2006/
doi:10.5194/adgeo-7-279-2006
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Partitioning of snowy and rainy precipitation in a case of a north Adriatic frontal passage
Meteorological Center of Teolo, ARPA Veneto, Italy
Abstract. A case of snow fall in the plains of the Northern Italian region Veneto is presented from a forecasters' perspective. Contrasting forecast guidance came from the ECMWF global model and the limited area model LAMI. The former showed a marked warm-moist Sirocco flow coming from the Adriatic Sea onto the coast at all levels, the latter discerned a distinct cold air flow from the north-east along the foothills of the Alps. The integrated observing network of the Centro Meteorologico di Teolo ARPA Veneto revealed this cold-air structure and helped the forecaster in the choice of the forecast and underpin the snowfall alert to the road authorities. It is argued that this feature is a crucial element for the occurrence of snowfall over the Veneto plains, and that the high-resolution numerical weather prediction model was essential in describing this mesoscale feature. The nature of the north-easterly flow is thought to be a combination of a Bora like flow and a barrier jet induced by flow blocking by the Alps.
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Citation: Monai, M., Rossa, A. M., and Bonan, A. C.: Partitioning of snowy and rainy precipitation in a case of a north Adriatic frontal passage, Adv. Geosci., 7, 279-284, doi:10.5194/adgeo-7-279-2006, 2006. Bibtex EndNote Reference Manager XML
