CHAMONIX VALLEY AND MONT-BLANC AREA WEATHER FORECAST


Matsuo Bashō
First celebrate
The flowers in your heart
Confined in winter
ISSUED AT 18:50 ON FRIDAY FEBRUARY 27, 2015
VALID FROM : FRIDAY FEBRUARY 27 2015 -- UNTIL : THURSDAY MARCH 05 2015

GENERAL SYNOPSIS
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
Improving - persistent low cloud
SKY CONDITION : mostly cloudy - becoming cloudy with clear spells, high up at first.
PRECIPITATIONradarlive precipitation over the Alps : 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.morelive precipitation radar over the Alps
TOMORROW - SATURDAY FEBRUARY 28
Fairly sunny - cold in the morning - getting milder in the afternoon
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
Cloudy deterioration - probably dry
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.
Uncertain.
SUNDAY MARCH 01
Disturbance crossing over - light precipitation - windy high up
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.
Very uncertain.
MONDAY MARCH 02
Very unsettled ‑ fairly heavy precipitation ‑ severe gale high up
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.
Very uncertain.
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.

ReportsAs a reminder, today in Chamonix, the sun rises at 07:12:36 and goes down at 18:17:25.
45.55 N 6.51 E - Altitude 1040 m
27 February 08:00
Temperature +1°C
Relative humidity 90%
Wind 0 km/h
Sea level pressure 1013 hpa - falling slowly
Pressure at 1042 m 890 mb
Precipitation last 6h 0.2 mm
Skies overcast - very light snow
Visibility 1000 m
Altitude 3845 m
27 February 07:00
Temperature -14°C
Wind WNW 35 km/h
Altitude 2250 m
27 February 06:00
Snow depth 50 cm
Wind 15 km/h
Gusts 20 km/h
Temperature -4°C