CHAMONIX VALLEY AND MONT-BLANC AREA WEATHER FORECAST


Matsuo Bashō
Withered by winter
One-colored world—
The sound of wind
ISSUED AT 19:15 ON WEDNESDAY OCTOBER 22, 2014
VALID FROM : WEDNESDAY OCTOBER 22 -- UNTIL : TUESDAY OCTOBER 28 2014

GENERAL SYNOPSIS
High 1030 hpa, Biscaye, drifting east while weakening slightly. Low 1000 hpa, Northern Balkans, moving away southeastward. Strong pressure gradient over the Alps : gale force to strong wind therefore persisting high up. Snow flurries disappearing towards the middle of the night. Keeping on to improving on Thursday, sunny, while becoming gradually milder, temperature matching seasonal average from Friday. Which fine autumnal condition is expected to lasting at least until the very beginning of next week.
WEDNESDAY EVENING OCTOBER 22 - AND OVERNIGHT
Starting up to improving - persistent strong wind high up
SKY CONDITION : mostly cloudy - becoming cloudy with clear spells.
PRECIPITATION : scattered or isolated shower still possible until the middle of the night - dry later.
WIND - ground level : variable light.
WIND - mid mountain : NNW -> N moderate - moderate to strong at times.
WIND - high mountain : N severe gale -> NNE strong.
TEMPERATURE : low -1°C.
ISOTHERM 0°C : 1400 -> 1600 m.
ISOTHERM -10°C : 2900 -> 4500 m.
Noticeably milder due to northerly fœhn wind effect in the Aosta Valley.
TOMORROW - THURSDAY OCTOBER 23
Improving very cool ‑ sunny in the afternoon - slightly decreasing wind high up
SKY CONDITION : cloudy with sunny spells, then clear or partly cloudy. period of sunshine close to 75%.
PRECIPITATION : none.
WIND - ground level : variable light to moderate.
WIND - mid mountain : N -> NNE moderate.
WIND - high mountain : NNE strong -> moderate to strong.
TEMPERATURE : low -1°C - high +10°C.
ISOTHERM 0°C : 1600 -> 3200 m.
ISOTHERM -10°C : 4500 -> 5000 m.
Noticeably milder due to northerly fœhn wind effect in the Aosta Valley.
THURSDAY TO FRIDAY NIGHT - OCTOBER 23 TO 24
Clear - cold by dawn in the valley
SKY CONDITION  : clear.
PRECIPITATION : none.
WIND - aloft : NNE moderate to strong -> N light to moderate.
TEMPERATURE : low -4°C.
Temperature inversion towards 1600 m.
FRIDAY OCTOBER 24
Sunny - white frost early in the morning - fairly mild in the afternoon
SKY CONDITION : clear or partly cloudy. Period of sunshine close to 95%.
PRECIPITATION : none.
WIND - aloft : N -> NNW light to moderate.
TEMPERATURE : low -4 °C - high +13°C.
Uncertain.
SATURDAY OCTOBER 25
Fairly sunny ‑ slightly hazy at times ‑ milder
SKY CONDITION : partly cloudy - thin high cloud at times. Period of sunshine close to 80%.
PRECIPITATION : none.
WIND - aloft : NW light to moderate -> N light.
TEMPERATURE : low -1°C - high +15°C.
Uncertain.
EXTENDED OUTLOOK UNTIL TUESDAY OCTOBER 28 2014

Sunday to Tuesday : sunny ‑ some high cloud at times - mild in the afternoon.

Forecast reliability : fairly good until Friday ‑ poor thereafter.

ReportsAs a reminder, today in Chamonix, the sun rises at 08:00:43 and goes down at 18:32:53.
45.55 N 6.51 E - Altitude 1040 m
22 October 08:00
Temperature +2°C
Relative humidity 90%
Wind 15 km/h
Sea level pressure 1019 hpa - rising
Pressure at 1042 m 902 mb
Precipitation last 6h 1.2 mm
Skies overcast - shower - mixed rain-snow
Visibility 1500 m
Altitude 3845 m
22 October 08:00
Temperature -14°C
Wind NW 80 km/h
Altitude 2250 m
22 October 08:00
Snow depth 10 cm
Wind 20 km/h
Gusts 60 km/h
Temperature -7°C