CHAMONIX VALLEY AND MONT-BLANC AREA WEATHER FORECAST


Iida Dakotsu
All in calmness—
The earth with half-opened eyes
Moves into the winter
ISSUED AT 18:50 ON SATURDAY NOVEMBER 22, 2014
VALID FROM : SATURDAY NOVEMBER 22 -- UNTIL : FRIDAY NOVEMBER 28 2014

GENERAL SYNOPSIS
Extended high system, Russia to Southern Scandinavia and further to Central Mediterranean shelters the Alps from the Northern Atlantic lows on their way eastward. Increasingly milder air is coming in high up from the southwest until Sunday evening, causing comfortable atmosphere over the sunny slopes between 1500 and 2500 m. Further trend is toward more cloud, persistent relative mildness, with shower risk and fœhn wind puffs in turn from Wednesday.
SATURDAY EVENING NOVEMBER 22 - AND OVERNIGHT
Partly cloudy - mild high up - cold in the valley
SKY CONDITION : partly cloudy - high cloud crossing over, thicker towards the middle of the night.
PRECIPITATION : none.
WIND - ground level : variable light.
WIND - mid mountain : SSE light to moderate.
WIND - high mountain : WSW light to moderate.
TEMPERATURE : low +2°C.
ISOTHERM 0°C : 3300 -> 3200 m.
ISOTHERM -10°C : 4700 m.
Possible fœhn wind puffs in the valley.
TOMORROW - SUNDAY NOVEMBER 23
Fairly sunny - more cloud crossing over - noticeably milder than seasonal average
SKY CONDITION : partly cloudy - high cloud crossing over, thicker early in the morning and towards the evening. period of sunshine close to 60%.
PRECIPITATION : none.
WIND - ground level : variable light.
WIND - mid mountain : SSE light to moderate.
WIND - high mountain : WSW -> SSW light to moderate.
TEMPERATURE : low +2°C - high +14°C.
ISOTHERM 0°C : 3200 -> 3300 m.
ISOTHERM -10°C : 4700 -> 4800 -> 4700 m.
Possible fœhn wind puffs in the valley.
SUNDAY TO MONDAY NIGHT - NOVEMBER 23 TO 24
Cloud crossing over - mild high up - cold in the valley
SKY CONDITION  : partly cloudy to cloudy - high cloud crossing over from the southwest, fairly thick at times.
PRECIPITATION : none.
WIND - aloft : SSW moderate.
TEMPERATURE : low +3°C.
Possible fœhn wind puffs in the valley.
MONDAY NOVEMBER 24
Hazy skies ‑ still noticeably milder than seasonal average
SKY CONDITION : partly cloudy to cloudy - high cloud, fairly thick at times. Period of sunshine close to 65%.
PRECIPITATION : none.
WIND - aloft : SSW -> S light to moderate.
TEMPERATURE : low +3 °C - high +14°C.
Uncertain.
TUESDAY NOVEMBER 25
Mainly cloudy - some sunny spells ‑ probably dry - still milder than seasonal average
SKY CONDITION : cloudy with sunny spells - mostly cloudy at times. Period of sunshine close to 45%.
PRECIPITATION : probably none.
WIND - aloft : S -> W light.
TEMPERATURE : low +2°C - high +13°C.
Uncertain.
EXTENDED OUTLOOK UNTIL FRIDAY NOVEMBER 28 2014

Wednesday : changeable ‑ sunny spells, mainly in the morning and light shower, mainly in the afternoon. Thursday : cloudy with sunny spells ‑ slight shower risk in the morning - possible fœhn wind in the afternoon ‑ very uncertain. Friday : fœhn wind in the valley at first - disturbance coming in later - southwest becoming strong high up - very uncertain.

Forecast reliability : fairly good until Sunday ‑ poor thereafter.

ReportsAs a reminder, today in Chamonix, the sun rises at 07:47:57 and goes down at 16:51:55.
45.55 N 6.51 E - Altitude 1040 m
26 November 08:00
Temperature +4°C
Relative humidity 95%
Wind 0 km/h
Sea level pressure 1016 hpa - falling
Pressure at 1042 m 896 mb
Precipitation last 6h 0.0 mm
Skies cloudy
Visibility 60000 m
Altitude 3845 m
26 November 08:00
Temperature -7°C
Wind SW 35 km/h
Altitude 2250 m
26 November 06:00
Snow depth 0 cm
Wind 0 km/h
Gusts 10 km/h
Temperature +2°C