CHAMONIX VALLEY AND MONT-BLANC AREA WEATHER FORECAST
ISSUED AT 18:50 ON FRIDAY FEBRUARY 27, 2015
VALID FROM : FRIDAY FEBRUARY 27 2015 -- UNTIL : THURSDAY MARCH 05 2015
The flowers in your heart
Confined in winter
Low 975 hpa, Norwegian Sea, filling slowly. Linked cold front moving away eastaward, while the Azores high is extending a ridge which will reach 1024 hpa over Southern Germany by Saturday morning and cause a fair sunny spell on Saturday. Then, from Sunday, a powerful westerly to northwesterly stream is expected to ruling partly next week, driving a series of disturbances which schedule and activity are still uncertain by now.
FRIDAY EVENING FEBRUARY 27 - AND OVERNIGHT
SKY CONDITION : mostly cloudy - becoming cloudy with clear spells, high up at first.
PRECIPITATION : probably none.
WIND - ground level : variable light.
WIND - mid mountain : N -> NE light.
WIND - high mountain : SW light to moderate -> variable light -> N moderate to strong.
TEMPERATURE : low -3°C.
ISOTHERM 0°C : 800 -> 1200 m.
ISOTHERM -10°C : 2600 -> 2800 m.
Wider clear spells over the Upper Aosta Valley due to northerly fœhn effect.
ROAD CONDITION ••••• : @ 18:30, winter condition - locally snow covered roadways outside of the salted itineraries - black ice risk.
TOMORROW - SATURDAY FEBRUARY 28
SKY CONDITION : low cloud, locally, early in the morning, dispelling - otherwise clear or partly cloudy - high cloud coming in from the west in the afternoon. period of sunshine close to 80%.
PRECIPITATION : none.
WIND - ground level : variable light to moderate.
WIND - mid mountain : NE -> variable -> NW light.
WIND - high mountain : N moderate to strong -> NNW moderate.
TEMPERATURE : low -4°C - high +4°C.
ISOTHERM 0°C : 1200 -> 1600 m.
ISOTHERM -10°C : 2800 -> 3600 m.
Milder with brighter sun over the Upper Aosta Valley due to northerly fœhn effect.
SATURDAY TO SUNDAY NIGHT - MARCH 28 TO 01
SKY CONDITION : cloudy, then mostly cloudy - thickening high cloud from the west.
PRECIPITATION : probably dry until dawn.
WIND - aloft : NNW moderate -> NW moderate to strong.
TEMPERATURE : low -2°C.
SUNDAY MARCH 01
SKY CONDITION : mostly cloudy to overcast - fleeting clear spells likely towards the evening. Period of sunshine close to 10%.
PRECIPITATION : mostly light - uncertain rain-snow limit changing between 1000 and 1500 m.
WIND - aloft : NW -> WNW moderate to strong.
TEMPERATURE : low 0 °C - high +4°C.
MONDAY MARCH 02
SKY CONDITION : overcast. Period of sunshine close to 0%.
PRECIPITATION : probably continuous and fairly heavy - uncertain rain-snow limit between 1600 and 1000 m.
WIND - aloft : W strong -> WNW severe gale.
TEMPERATURE : low +1°C - high +6°C.
EXTENDED OUTLOOK UNTIL THURSDAY MARCH 05
Thursday : improving slightly ‑ sunny spells in the afternoon - NW gale high up, decreasing. Wednesday : unsettled ‑ snow showers ‑ possible sunny spells. Thursday : getting colder - snow showers - strong N wind high up later. Very uncertain for the three days.
Forecast reliability : fairly good until Saturday ‑ poor thereafter.