CHAMONIX VALLEY AND MONT-BLANC AREA WEATHER FORECAST
ISSUED AT 08:08 MONDAY MAY 28 2012
VALID FROM : MONDAY MAY 28 2012 -- UNTIL : SATURDAY JUNE 02 2012
GENERAL SYNOPSIS
Flat low, Mediterranean to Southern British Isles with slightly increasing pressure field as time goes by. Light stream high up, mainly north, allowing for some diurnal instability and thermal breezes. Which summer characteristic pattern is expected to persisting until Wednesday with a slightly changeable and unpredictable level of instability day after day. Disturbance expected to crossing over by Thursday. Probably changeable and cooler on Friday. Further outlook is uncertain.
TODAY - MONDAY MAY 28 2012
Sunny and warm - late afternoon thundery shower risk
SKY CONDITION : clear or partly cloudy - locally cloudy in the afternoon due to cumulus cloud growth over the slopes. Period of sunshine close to 85%.
PRECIPITATION : thundery shower risk towards the latter part of the afternoon.
WIND - ground level : variable light in the morning - moderate afternoon thermal breeze.
WIND - mid mountain : NNW light.
WIND - high mountain : NNE light to moderate.
TEMPERATURE : low +10°C - high +23°C.
ISOTHERM 0°C : 2800 -> 3000 m.
ISOTHERM -10°C : 4600 -> 4700 m.
OVERNIGHT
Clear - fairly cool by dawn
SKY CONDITION : locally cloudy before dusk - clearing.
PRECIPITATION : probably none.
WIND - aloft : NNE -> N light to moderate.
TEMPERATURE : low +7°C.
TUESDAY MAY 29
Sunny and warm - late afternoon thundery shower slight risk
SKY CONDITION : clear or partly cloudy - afternoon cumulus cloud growth over the slopes. Period of sunshine close to 85%.
PRECIPITATION : late afternoon shower slight risk.
WIND - aloft : N light to moderate.
TEMPERATURE : low +7 °C - high +25°C.
WEDNESDAY MAY 30
Sunny and warm - afternoon thundery shower risk
SKY CONDITION : clear or partly cloudy in the morning - becoming locally cloudy in the afternoon due to cumulus cloud growth. Period of sunshine close to 75%.
PRECIPITATION : thundery shower slight risk towards the latter part of the afternoon.
WIND - aloft : WNW light.
TEMPERATURE : steady.
EXTENDED OUTLOOK UNTIL SATURDAY JUNE 02 2012

Thursday : fairly sunny in the morning - disturbance coming in from the northwest during the afternoon while getting cooler. Friday : changeable and cooler - scattered showers in the morning - sunny spells in the afternoon. Saturday : fairly sunny - cool in the morning - mild in the afternoon - outlook is uncertain.

Forecast reliability : fairly good until Wednesday - poor thereafter.

ReportsAs a reminder, today in Chamonix, the sun rises at 05:47:24 and goes down at 21:12:23.
Chamonix - ville
45.55 N 6.51 E - Altitude 1040 m
28 May 08:00
Temperature +10°C
Relative humidity 100%
Wind 0 km/h
Sea level pressure 1018 hpa - rising slowly
Pressure at 1042 m 898 mb
Precipitation last 6h 0 mm
Skies partly cloudy
Visibility 35000 m
Aiguille du Midi
Altitude 3845 m
28 May 08:00
Temperature -9°C
Wind NE 20 km/h
Aiguilles Rouges
Altitude 2250 m
28 May 06:00
Snow depth 80 cm
Wind 5 km/h
Gusts -- km/h
Temperature +3°C
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