Chamonix Green & White » Snow http://chamonix-green-white.com News, Weather, Videos, Accommodation, Chalets, Skiing, Telemark, Mountaineering Thu, 17 May 2012 16:17:00 +0000 en hourly 1 http://wordpress.org/?v=3.2.1 CHAMONIX VALLEY AND MONT-BLANC AREA WEATHER FORECAST ISSUED AT 08:40 FRIDAY DECEMBER 30 2011 http://chamonix-green-white.com/2011/12/30/chamonix-valley-and-mont-blanc-area-weather-forecast-issued-at-0840-friday-december-30-2011/ http://chamonix-green-white.com/2011/12/30/chamonix-valley-and-mont-blanc-area-weather-forecast-issued-at-0840-friday-december-30-2011/#comments Fri, 30 Dec 2011 09:17:07 +0000 admin http://chamonix-green-white.com/?p=3306 One for the scrapbook….

CHAMONIX VALLEY AND MONT-BLANC AREA WEATHER FORECAST

ISSUED AT 08:40 FRIDAY DECEMBER 30 2011
VALID FROM : FRIDAY DECEMBER 30 2011
UNTIL : WEDNESDAY JANUARY 04 2012

GENERAL SYNOPSIS
High 1041 hpa, west of Portugal, weakening. Low 978 hpa, south of Finland, moving north. Humid and very unsettled polar air flow in-between, with barrier effect against the Northern Alps today, producing heavy precipitation and severe gale force wind high up. The unsettled train is keeping on to crossing over the area with a warm front coming in from the west by Saturday, causing the rain-snow limit to gradually rise up towards 1600 m.
TODAY – FRIDAY DECEMBER 30 2011
Snow – gale high up
SKY CONDITION : overcast or mostly cloudy. Period of sunshine close to 0%.
PRECIPITATION : continuous – moderate to heavy in the morning – light in the afternoon – rain-snow limit towards 600 m – expected snowfall towards 1000 m : 30-40 cm.
WIND - ground level : variable light.
WIND - mid mountain : NW moderate – moderate to strong at times.
WIND - high mountain : NNW severe gale.
TEMPERATURE : low -4°C - high -2°C.
ISOTHERM 0°C : 800 -> 1000 m.
ISOTHERM -10°C : 2400 -> 2600 m.
OVERNIGHT
Getting milder – snow, changing to rain towards dawn
SKY CONDITION : mostly cloudy to overcast.
PRECIPITATION : light at first – getting heavier later – rain-snow limit rising up towards 1100 m – expected snowfall towards 1200 m : 10-20 cm.
WIND - aloft : NNW gale -> NW strong.
TEMPERATURE : low -2°C.
SATURDAY DECEMBER 31
Warm front crossing over – moderate to heavy precipitation in the morning
SKY CONDITION : overcast or mostly cloudy. Period of sunshine close to 0%.
PRECIPITATION : moderate to heavy in the morning – lighter in the afternoon – rain-snow limit between 1100 and 1700 m – expected snowfall towards 2000 m : 50-70 cm.
WIND - aloft : NW strong -> moderate to strong.
TEMPERATURE : low +1 °C - high +1°C.
SUNDAY JANUARY 01
Unsettled and milder than seasonal average – improving in the afternoon
SKY CONDITION : mostly cloudy in the morning – becoming cloudy with sunny spells in the afternoon. Period of sunshine close to 40%.
PRECIPITATION : scattered showers in the morning – rain-snow limit towards 1600 m – dry in the afternoon.
WIND - aloft : WNW light to moderate -> WSW moderate.
TEMPERATURE : rising slightly.
EXTENDED OUTLOOK UNTIL WEDNESDAY JANUARY 04 2012

Monday : cold front crossing over – heavy snow at times. Tuesday : improving – possible showers in the morning – sunny spells later. Wednesday : weak disturbance possibly crossing over in the morning – improving later. Outlook is uncertain.

Forecast reliability : fairly good until Saturday – poor thereafter.

]]> http://chamonix-green-white.com/2011/12/30/chamonix-valley-and-mont-blanc-area-weather-forecast-issued-at-0840-friday-december-30-2011/feed/ 0 The first snow of winter 2011-2012 falls in Chamonix http://chamonix-green-white.com/2011/10/08/the-first-snow-of-winter-2011-2012-falls-in-chamonix/ http://chamonix-green-white.com/2011/10/08/the-first-snow-of-winter-2011-2012-falls-in-chamonix/#comments Sat, 08 Oct 2011 15:47:47 +0000 admin http://chamonix-green-white.com/?p=2576 The first snow fall of the 2011-2012 winter in the alps

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