<abstract xmlns="http://www.w3.org/1999/xhtml"><p> Taking into consideration the spatial variability of the occurrence of hail in central Europe in the warm season (April - September) during the years 1966-2010, five hail regions were distinguished by Ward’s group hierarchy method. For this purpose the daily data of hail occurrence were used. Circulation patterns responsible for hail precipitation at each cluster of stations were analysed using Reanalysis data (NCEP/NCAR). Composite maps of the sea-level pressure, 500 hPa geopotential height and 850 hPa-level temperature means were constructed for the days with hail. Additionally, anomalies of the values of each parameter were presented. It was found that more than 65% of hail events were recorded from April to June, with May as the hail-peak month. In all five distinguished regions hail precipitation was associated with negative anomalies of SLP and 500 hPa heights over Europe, most often with low-pressure systems developing within colder than usual air mass.</p></abstract>

Taking into consideration the spatial variability of the occurrence of hail in central Europe in the warm season (April - September) during the years 1966-2010, five hail regions were distinguished by Ward’s group hierarchy method. For this purpose the daily data of hail occurrence were used. Circulation patterns responsible for hail precipitation at each cluster of stations were analysed using Reanalysis data (NCEP/NCAR). Composite maps of the sea-level pressure, 500 hPa geopotential height and 850 hPa-level temperature means were constructed for the days with hail. Additionally, anomalies of the values of each parameter were presented. It was found that more than 65% of hail events were recorded from April to June, with May as the hail-peak month. In all five distinguished regions hail precipitation was associated with negative anomalies of SLP and 500 hPa heights over Europe, most often with low-pressure systems developing within colder than usual air mass.

Climatology of Hail in Central Europe

Institute of Physical Geography and Environmental Planning, Adam Mickiewicz University in Poznań, Poland

Quaestiones Geographicae

{"article-title":"Climatology of Hail in Central Europe"}

Taking into consideration the spatial variability of the occurrence of hail in central Europe in the warm season (April - September) during the years...

Climatology of Hail in Central Europe

Published Online: Oct 12, 2013

Page range: 99 - 110

DOI: https://doi.org/10.2478/quageo-2013-0025

Keywords
central Europe, hail frequency, hail regions, atmospheric circulation

This content is open access.

Climatology of Hail in Central Europe

Published Online: Oct 12, 2013

Page range: 99 - 110

DOI: https://doi.org/10.2478/quageo-2013-0025

Keywordscentral Europe, hail frequency, hail regions, atmospheric circulation

This content is open access.

Keywords
central Europe, hail frequency, hail regions, atmospheric circulation