www.chamonix-weather.com - FRIDAY NOVEMBER 21 2008
CHAMONIX VALLEY AND MONT-BLANC AREA WEATHER FORECAST
ISSUED AT 08:45 FRIDAY NOVEMBER 21 2008
VALID FROM : FRIDAY NOVEMBER 21 -- UNTIL : WEDNESDAY NOVEMBER 26 2008
GENERAL SYNOPSIS
High 1041 hpa, far west of Ireland, almost stationary. Extended low area 972-975 hpa over Scandinavia, filling slowly. Linked cold front, very active, reaching the Alps today, ahead of an extended unsettled and humid polar air income
TODAY - FRIDAY NOVEMBER 21 2008
Overcast - snow - NW gale high up
SKY CONDITIONS (cloud - sunshine) : overcast - period of sunshine close to 0%.
PRECIPITATION : starting up in the morning - becoming moderate in the afternoon - locally heavy towards the evening - rain-snow limit towards 1200 m, dropping towards 600 m at night - expected snowfall towards 1500 m : 25-35 cm.
WIND
-
ground level : variable light.
-
mid mountain : WSW light -> WNW moderate to strong.
-
high mountain : NW strong -> gale force.
TEMPERATURE : min 0°C - max +2°C.
ISOTHERM 0°C :
1800 -> 500 m.
ISOTHERM -10°C :
4200 -> 3100 m.
OVERNIGHT
Snow - getting noticeably colder
SKY CONDITIONS (cloud) : overcast.
PRECIPITATION : continuous - moderate at first, then light - rain-snow limit below 500 m - expected snowfall towards 1500 m : 20-30 cm.
WIND
-
aloft : NW gale.
TEMPERATURE : -4°C.
TOMORROW - SATURDAY NOVEMBER 22
Mainly cloudy - snowy - cold - gale high up
SKY CONDITIONS (cloud - sunshine) : overcast or mostly cloudy - period of sunshine close to 0%.
PRECIPITATION : frequent showers - rain-snow limit below 500 m - expected snowfall towards 1500 m : 20-30 cm
WIND
-
aloft : NW gale -> NNW strong.
TEMPERATURE :
min -4°C - max -2°C.
SUNDAY NOVEMBER 23
Scattered snow showers - very cold - fleeting sunny spells
SKY CONDITIONS (cloud - sunshine) : mostly cloudy or cloudy at times with fleeting sunny spell - period of sunshine close to 20%.
PRECIPITATION : scattered showers - rain-snow limit below 500 m - expected snowfall towards 1500 m : 5 -10 cm.
WIND
-
aloft : N strong -> NW moderate to strong.
TEMPERATURE :
dropping in the morning - rising later.
EXTENDED OUTLOOK UNTIL WEDNESDAY NOVEMBER 26 2008
Monday : overcast - slightly milder - frequent snow showers - becoming scattered towards the evening. Tuesday and Wednesday : very cold - sunny spells likely - outlook is uncertain.
Forecast reliability : fairly good until Sunday - poor thereafter.
Reports
Chamonix-ville
45.9 N 6.9 E - Altitude 1042 m 21 November 07:00
Temperature 0 °C Relative humidity 98 % Wind 0 km/h Pressure 1020 hpa - falling Pressure at 1042 m 899 mb Precipitation last 6h 0.0 mm Visibility 18000 m
Aiguille du Midi Altitude 3845 m 21 November 07:00
Temperature -9 °C Wind W 50 km/h Relative humidity %
Le Lac Blanc Altitude 2330 m 21 November 07:00
Snow depth 5 cm Wind 30 km/h Gusts -- km/h Temperature +2 °C Relative humidity -- %
