CHAMONIX VALLEY AND MONT-BLANC AREA WEATHER FORECAST
ISSUED AT 19:50 ON SATURDAY FEBRUARY 06, 2016
VALID FROM : SATURDAY FEBRUARY 06 -- UNTIL : FRIDAY FEBRUARY 12 2016
Low 958 hpa north of Ireland, moving northeast. High 1030 hpa, Ionian Sea to Northern Balkans. • Resulting isobaric lines tightening over the Northwestern Alps will strengthen the altitude southwesterly stream tonight; fœhn wind will continue to increase in the valley as well; it will still be blowing on Sunday morning delaying the cold front's crossing until the middle of the day. • Further outlook will be affected by the bad westerly weather ruling all over Northern Europe thereafter : series of wintry disturbances crossing over and going along with severe gales high up, probably until the end of the week.
SATURDAY EVENING FEBRUARY 06 - AND OVERNIGHT
SKY CONDITION : high cloud patches running over from the south, getting more frequent - cloudy with clear spells by dawn.
PRECIPITATION : none.
WIND - ground level : fœhn moderate to strong - strong gusts.
WIND - mid mountain : S moderate - gusty - strong at times.
WIND - high mountain : SW moderate to strong -> SSW strong.
TEMPERATURE : low +5°C.
ISOTHERM 0°C : 1800 -> 1700 m.
ISOTHERM -10°C : 3800 -> 3300 m.
ROAD CONDITION ••••• : @ 18:30, partly snow covered roadways while driving through the Montets and Forclaz passes.
TOMORROW - SUNDAY FEBRUARY 07
SKY CONDITION : cloudy with hazy sunny spells early in the morning - becoming mostly cloudy to overcast. Period of sunshine close to 0%.
PRECIPITATION : starting up before noon - becoming quickly moderate, then light and scattered - rain-snow limit towards 1400 m, dropping towards 1000 m - expected snowfall towards 1800 m : 15-20 cm, windblown.
WIND - ground level : fœhn wind still fairly strong early in the morning, then decreasing.
WIND - mid mountain : S moderate -> W light.
WIND - high mountain : SSW strong -> moderate to strong.
TEMPERATURE : low +1°C - high +5°C.
ISOTHERM 0°C : 1700 -> 1300 m.
ISOTHERM -10°C : 3300 -> 3100 m.
SUNDAY TO MONDAY NIGHT - FEBRUARY 07 TO 08
SKY CONDITION : mostly cloudy at first - becoming clear or partly cloudy towards the middle of the night - high cloud coming in from the northwest later.
PRECIPITATION : none.
WIND - aloft : SSW moderate to strong -> variable light -> WNW moderate to strong.
TEMPERATURE : low -4°C.
MONDAY FEBRUARY 08
SKY CONDITION : cloudy with hazy sunny spells in the morning - becoming mostly cloudy to overcast. Period of sunshine close to 20%.
PRECIPITATION : resuming towards the middle of the day - light, then moderate - rain-snow limit rising up towards 1400 m - expected snowfall towards 1800 m : 5-10 cm, windblown.
WIND - aloft : WNW moderate to strong -> W strong to gale force.
TEMPERATURE : low -3 °C - high +4°C.
TUESDAY FEBRUARY 09
SKY CONDITION : mostly cloudy to overcast. Period of sunshine close to 0%.
PRECIPITATION : light and scattered in the morning - getting moderate in the afternoon - heavy in the evening - rain-snow limit towards 1400 m, dropping towards 900 m in the evening - expected snowfall towards 1800 m : 30-50 cm, windblown.
WIND - aloft : WSW strong - strong to gale force at times.
TEMPERATURE : low -2°C - high +4°C.
EXTENDED OUTLOOK UNTIL FRIDAY FEBRUARY 12
Wednesday : unsettled and cold ‑ scattered snow showers ‑ NW strong high up. Thursday : unsettled, getting milder ‑ showers, more frequent in the afternoon ‑ very uncertain rain‑snow limit ‑ strong wind high up. Friday : cold front crossing over - severe gale likely high up.
Forecast reliability : poor.
Avalanche risk is considerable (3/5) above 1800 m.