I'm not sure if that was a true Fohn Wind though in the sense of how that is defined. When I think of a Fohn Wind, I think of really mild SSW winds which on its windward side on southern and western coasts give a lot of orographic rainfall. On the leeward side of high ground, the air dries out and often becomes a lot sunnier with temperatures then shooting up to around 15°C or so as far north as Inverness in the middle of winter.
To me, that is what meets the definition of a Fohn Wind which according to what I was taught in school, is what a mild and damp wind basically becomes once it reaches the leeward side of any high ground which is in its way. With those easterlies which I described though, there was no damp air to begin with and even though it was cooler along the east coast, it was still sunny there as I discovered when I went to sit outside in the sunshine, only to find that it was rather chilly with that wind. This means that there was certainly no orographic rainfall here.
However, I can still see that there would be a warming effect once those winds reached the other side of any high ground which in this case, would result in the temperatures shooting up in NW Scotland. Nevertheless, do we still refer to them as Fohn Winds if they weren't actually damp to begin with on the windward side?
Originally Posted by: johncs2016