November is known as a moody month and has lived up to its name so far. What has been largely absent so far is high pressure. There are no signs of a prolonged period of fine weather this week either, although there will be high pressure weather on Thursday. However, this will result in the first widespread air frost in the Swiss Plateau on Thursday morning. The high pressure won't last long, however, and the coming weekend will see largely low-pressure conditions again.
Friendly start to the week
The week will get off to a friendly start in the north with sunny spells and mostly dry weather, with only a few showers possible along the Alps towards the evening. With a weak to moderate south-westerly to westerly wind, it will be mild for the time of year and we expect temperatures of around 12 to 13 degrees. This will make today the mildest day of the week. There will be similar maximums in the south with fairly sunny conditions (see Fig. 1).
Fig. 1: Weather today Monday; Source: MeteoNews
Unsettled Tuesday
After a disturbance reached us from the north during the night, tomorrow, Tuesday, will see variable to very cloudy weather with a few showers in the north. Slightly more showers are expected along the Alps than in the Swiss Plateau, partly because the high-altitude current will turn to the north during the day. At just under 10 degrees, the snow line will be at around 1100 to 1300 meters, but the amount of fresh snow in the mountains will not be too great. During the night to Wednesday, the precipitation will shift more and more towards the Alps, while the snow line will drop below 1000 meters.
In the south, there will be quite a lot of sunshine tomorrow Tuesday under the protection of the Alps and with a bit of a northerly Foehn, especially in the afternoon, it will be a milder 14 degrees compared to the north.
Very cool Wednesday
Wednesday will bring high fog-like clouds in the north, which will slowly clear during the day, especially in the Swiss Plateau. Along the mountains there will be showers at first with flakes from around 600 to 800 meters. With some breeze, temperatures will not rise above 4 to 6 degrees.
The situation will be quite different in the south, where a gusty northerly Foehn will ensure plenty of sunshine and temperatures of up to 15 degrees.
Frosty Thursday morning
After clearing everywhere during the night, Thursday will begin with widespread frost (see Fig. 2). This will be the first widespread frost; so far there has only been frost in places in the Swiss Plateau and Alpine valleys. Despite a few patches of high fog, the sun will often shine during the day, but temperatures will not exceed 6 to 7 degrees. In the south, which is also mostly sunny, it will be milder again at 11 to 12 degrees. Temperatures will rise significantly in the mountains, with the zero degree line climbing above 2500 meters.
Fig. 2: Low temperatures on Thursday morning; Source: MeteoNews, UBIMET
Unsettled again from Friday, details unclear
From Friday onwards, the weather models will diverge considerably, but what they all have in common is that the south-western edge of a low pressure system over the Baltic States or western Russia in the north will again be unsettled and occasionally wet. This does not apply to the south, which will continue to be protected due to the prevailing north-westerly to westerly winds (see Fig. 3). It will also become significantly cooler again, especially in the north at higher altitudes, although the extent of the cooling is still unclear. Some weather models are predicting wet snowflakes as far as the Swiss Plateau at the weekend. In others, the snow line is quite low, but not enough for flakes in the Swiss Plateau. It is also unclear how much precipitation will fall from Friday. MeteoNews will keep you informed as soon as the development becomes clearer.
Fig. 3: Weather and temperature outlook from tomorrow Tuesday (from Friday in the north still very uncertain in detail); Source: MeteoNews
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