Numerical Study of an Intense Episode of Vardaris Wind

  • L. Tsopouridis
  • I. Pytharoulis
  • T. Karacostas
  • P. Zanis
  • I. Tegoulias
Conference paper
Part of the Springer Atmospheric Sciences book series (SPRINGERATMO)

Abstract

This paper presents a case study of an episode of Vardaris that occurred on 10 November 2007 and caused widespread problems in Central Macedonia. It uses surface data including four stations along Axios valley (Evzonoi, Aksioupoli, Akropotamos, and Kymina), analyses and the nonhydrostatic Weather Research and Forecasting model. The episode was associated with the combination of a transient depression over Greece and an anticyclone in Western Europe. Maximum sustained wind speeds of 20.5 m/s with gusts up to 28.2 m/s appeared along Axios and at Thessaloniki airport (24 m/s with gusts up to 31.9 m/s). The model simulations with a horizontal resolution of 1 km were in good agreement with observations. The strongest winds, in excess of 30–35 m/s, were simulated between 750 and 900 hPa in the form of a jet streak. A numerical experiment showed that the occurrence of the episode was determined by the synoptic scale flow, but its maximum intensity was specified by the local conditions due to channeling.

Keywords

Wind Speed Maximum Wind Speed Sustained Wind Speed Maximum Sustain Wind Speed Transient Depression 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

The authors would like to thank NOA (and especially Dr. Lagouvardos and Dr. Koletsis), HNMS, the School of Agriculture of AUTH, ELGA, the Region of Central Macedonia, ECMWF, UKMO and NCEP for the availability of the necessary data as well as NCAR for providing the WRF-ARW model.

References

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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • L. Tsopouridis
    • 1
  • I. Pytharoulis
    • 1
  • T. Karacostas
    • 1
  • P. Zanis
    • 1
  • I. Tegoulias
    • 1
  1. 1.Department of Meteorology and Climatology, School of GeologyAristotle University of ThessalonikiThessalonikiGreece

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