Downslope windstorm in High Tatras, 19 November 2004

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2.5 km hydrostatic run with physics• Extreme wind speeds on the lee side: area of increasedstatic stability and downsloping isotherms of „θ“• Vertical velocities: effect similar to “hydraulic jump”NWPotential vorticity + windSEPot. Temperature + Vertical velocity (Pa/s)
2,5 km non- hydrostatic run• Time shift of the event (max. wind speeds 3 h later)• main structure of the flow similar to hydrostatic runPotential vorticity + windTrue vertical velocities (m/s)
Page 1 and 2: Downslope windstorm in High Tatras1
Page 3 and 4: Impact of the 19 November windstorm
Page 5 and 6: Local observations• Gusty charact
Page 7 and 8: Success of the operational forecast
Page 9: 2.5 km hydrostatic run with physics
Page 13 and 14: Sensitivity testsMax. gust 40 m/s33
Page 15 and 16: Mesoscale diagnostics• Increase o
Page 17 and 18: Conclusions: points of view• NWP

Downslope windstorm in High Tatras, 19 November 2004

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