Weather information and resources for the megeve, st gervais, les contamines, and chamonix area.
Live updates of ski lift status & opening times for the Grand Massif ski area across Flaine, Les Carroz, Samoens, & Morillon. As well as snow conditions, and snow stability forecast.
Live updates of ski lift operating times in Megeve, St Gervais, and Les Contamines. Piste and trail opening status, lift opening status, and snow conditions.
Detailed 3 day mountain weather forecast for the entire Mt Blanc valley area
Weather and Webcam (1800m) Updated daily.
BULLETIN FROM FRIDAY DECEMBER1, 2023 AT 10:10 AM
FRIDAY, DECEMBER1 TO WEDNESDAY, DECEMBER 6
GENERAL SITUATION AND EVOLUTION
BAD WEATHER – Persistence of a large low-pressure system centered on the Baltic States, bringing very unstable maritime polar air from the Barents Sea and Spitsbergen to SW Portugal. – Minimum 999 hpa in the SE margin of this flow, to the immediate S of Brittany this morning, shifting towards Aquitaine as it fills in, but accelerating a very wet and disturbed reverse flow from Madeira towards Belarus, and concerning the immediate NW of the Alpine arc where the pressure field has continued to collapse [ Chamonix, 1001 – Sion, 1003 – Innsbruck, 999 ]. Shifting to the E, the influx of polar air forms a trough that will keep the disturbed flow colder than usual on Saturday.
Bad weather – snow in the upper valley this evening – strong gale in the mountains
Cloud cover: overcast, ceiling in the valley – cloud cover blocked against the mountains – sunshine: 0%.
Near-continuous, moderate precipitation – rain-snow limit dropping towards 1600 m – quantity expected towards 1800 m: 25-30 cm, windy and packed
Winds according to altitude
in valleys: variable, light to very light – temporarily SSW to SW
mid-mountain: moderate to strong SW – temporarily strong
high mountains: very irregular WSW – strong gales -> strong SW in the evening
Valley temperatures :
Altitude of isotherms :
0°C, 2500 -> 1900 m
-10°C, 4400 -> 4500 -> 4200 m
Bad weather – in the valley, rain turns to snow showers – strong wind at higher altitudes
Cloud cover : overcast – ceilings generally below 1800 m – a few patches of fog at the bottom of the valley – iso 0°C falling towards 900 m
Precipitation evolving into showers, but nevertheless frequent – rain-snow limit falling towards 600 m – quantity expected around 1600 m: 10-25 cm, blown away
Wind aloft: very irregular SW – strong -> moderate – jumping NNW shortly before dawn
Minimum valley temperature: -4°C
SATURDAY DECEMBER 2
Gloomy – continued cooling – snow showers – windy in the mountains
Cloudiness : very cloudy to overcast – fleeting sunny spells not impossible in the afternoon – sunshine : 15%.
Showers becoming scattered or even isolated in the afternoon – rain-snow limit below 600 m at daybreak – amount expected around 1000 m: 5-15 cm
Wind aloft: moderate NNW -> moderate to strong
Valley temperatures :
SUNDAY DECEMBER 3
Sunny – biting cold under clear skies at dawn – easing on the adrets in the afternoon – windy at higher altitudes
Cloud cover: slight risk of low clouds in the early morning – otherwise clear or partly cloudy – sunshine: 85%.
Wind aloft: predominantly NW – moderate to strong
Valley temperatures: minimum falling – maximum stationary
CHANGE UNTIL WEDNESDAY DECEMBER 6
MONDAY: thaw – a disturbance arrives from the W, covering the upper sky during the morning – snow showers in the upper valley in the afternoon – WSW wind in the mountains
TUESDAY: disturbance partly blocked against the high mountains – still very cloudy with snow showers – clearing possible in the evening
WEDNESDAY: very uncertain: becoming cloudy to very cloudy as the hours go by – probably no precipitation – stationary temperatures – temporarily windy in the morning
During these three days: 30 to 50 cm of additional snow around 1500 m
Forecast reliability :
fairly good until Sunday – mediocre thereafter.
Live webcam is located at 1800m of altitude at the top of mt d’arbois in St Gervais / Megeve. The weather forecast applies to all mountain areas in the Mt Blanc valley; Chamonix skiing, Megeve Skiing, and St Gervais Skiing.