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To have a snowfall we need -25 C and below at 500hpa and -2 C and below at 850hpa. For settling snow we need -4 C and below at 850 hpa. Sometimes it achieved to snow even with -0,5 C at 850 hpa due to some winds. For example if there is a barometric low in Adriatic Sea and has a direction to Greece it snows very easy in Ioannina even with 0 C at 850 hpa sometimes. In Serres we need a barometric low to pass from Ionian Sea through Aegean and then it need to move NE to affect us. This year it snowed in Ioannina with -1 C at 850 hpa and 1 C surface temperature heavily at 3 February. In late January 2014 it snowed in Serres with -0,5 C at 850 hpa and 2 C surface temperature just because of strong NW winds that come from the Vardar Valley in FYROM to here in Macedonia and temperatures drop quickly.
It is true. It snowed at night of 28-01-2014 in Serres just search at meteociel to see the maps!!! It snowed at the change of the day beetween 2 and 3 February this year in Ioannina. You can see the maps. Here we have a different topography it snows easier than in oceanic climates of W and NW Europe.
More? In Serres we have 7 days of snowfall on average (only snow not sleet) and 6 days in Ioannina.
Here is a map for example. Heavy snowfall for some hours in Ioannina after a thundersleet during the day. The previous days we had about 100 mm of rain that still existed on the ground and look at the result in the video. I was impressed.
Location: Northern Ireland and temporarily England
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Well no he doesn't Nei.I had 40 days of snow this year.
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