Slide 1 A case of heavy snowfall in Austria, end of January 2014 FDRD – Ivan Tsonevsky - March 2014

Slide 2 Heavy snowfall, Austria, 30-31/01/2014 Heavy snowfall hit Austria at the end of January In Dellach (628 m) 302 cm of snowfall were registered over a period of 26 days (compared to a long-term average of 78 cm). Over a 48-h period ( UTC to UTC), it snowed 131 cm at this station, corresponding to a yr event. FDRD – Ivan Tsonevsky - March 2014 Dellach Analysis 31/01/ UTC

Slide 3 ENS snowfall 30/01/2014 FDRD – Ivan Tsonevsky - March /01/2014

Slide 4 HRES 48h snowfall, VT: 30/01/ UTC – 01/02/ UTC Short-range HRES gave very accurate prediction of the snow amounts and its location. The black triangle on the maps denotes Dellach where 131 cm fell in this period. FDRD – Ivan Tsonevsky - March 2014 T+6-54h T+30-78h T h

Slide 5 Freezing rain, Slovenia, beginning of Feb 2014 An ice storm damaged forests and power lines in Slovenia at the beginning of February The Slovenian government said that more than 40% of the Alpine forests had been damaged. One in four homes in Slovenia left without electricity. FDRD – Ivan Tsonevsky - March 2014 Photos are from Postojna, SW Slovenia on 3 rd February 2014

Slide 6 Analysis, 02/02/ UTC Weather front from the Atlantic reached Central Europe and became quasi-stationary as its propagation was blocked by a high pressure system situated over Eastern Europe. Temperature inversions with a sub-freezing temperatures at the surface were related to the high pressure system and heavy snowfall occurred at the end of January. FDRD – Ivan Tsonevsky - March 2014 MSLP & 2mT Z500 & T850

Slide 7 02/02/ UTC The new scheme gave a clear signal of heavy freezing rain over Slovenia exactly where the most affected areas were. FDRD – Ivan Tsonevsky - March 2014 Green = Rain Pink = Sleet Turqoise = Wet snow Blue = Snow Red = Freezing rain Yellow = Ice pellets 0° C isotherm = blue contour HRES T+12h new scheme OBS

Slide 8 02/02/ UTC FDRD – Ivan Tsonevsky - March 2014 Green = Rain Pink = Sleet Turqoise = Wet snow Blue = Snow Red = Freezing rain Yellow = Ice pellets 0° C isotherm = blue contour HRES T+12h new scheme OBS HRES T+11h new scheme