2012 • Chamonix Green & White
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What is Massif Monitor?

Massif Monitor
It's a Cloud based monitoring layer which can be used to view practically any data in real time. This can include data from the cpu of any device using our compiled linux service, msfmon or real time web user monitoring with live user geolocation.

real time web user monitoring

tings tings get created when a user visits your sites. It saves a small record of that person's visit which can be viewed in our GUI in real time. It's Quicker than Google Analytics and much more meaningful.

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monitor See what's happening on the actual processor as it happens. This helps identify, predicts and defect against problems and outatages

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where is it,
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Today

TODAY – MONDAY DECEMBER 31 2012
Sunny – cold in the morning – getting milder in the afternoon
SKY CONDITION : clear or partly cloudy – thin high cloud. Period of sunshine close to 85%.
PRECIPITATION : none.
WIND - ground level : variable light.
WIND - mid mountain : S light to moderate.
WIND - high mountain : WSW light to moderate -> moderate.
TEMPERATURE : low -7°C - high +5°C – temperature inversion toward 1500 m.
ISOTHERM 0°C : 2200 -> 2400 m.
ISOTHERM -10°C : 3800 -> 4000 m.


chamonixmeteo.com

Overnight

OVERNIGHT
Increasing cloud from the west – increasing wind high up
SKY CONDITION : partly cloudy early in the night – becoming cloudy – thickening high cloud.
PRECIPITATION : none.
WIND - aloft : WSW moderate -> SW moderate to strong.
TEMPERATURE : low -3°C.

Tomorrow

TUESDAY JANUARY 01
Hazy sky in the morning – rain, then snow in the afternoon
SKY CONDITION : partly cloudy, then mostly cloudy in the morning – thickening high cloud – overcast towards the middle of the day. Period of sunshine close to 20%.
PRECIPITATION : starting up during in the afternoon – moderate – rain-snow limit towards 1300 m, dropping towards 1000 m – expected snowfall towards 1500 m : 10-20 cm.
WIND - aloft : SW moderate to strong -> moderate.
TEMPERATURE : low -3 °C - high +1°C.

Synopsis

Extended high area, Madeira to Black Sea, starting up to weakening over France in the afternoon. Thus, sunny condition today, milder than seasonal average high up. Weaker pressure field on Tuesday allowing for a fairly active cold front to coming in by Tuesday afternoon and to moving away eastward by Wednesday morning. From Thursday, the Azores high is expected to getting strength over the Western Alps and to persisting for a while.

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Today

TODAY – SUNDAY DECEMBER 30 2012
Unsettled morning – cold high up – sunny spells spreading out in the afternoon
SKY CONDITION : mostly cloudy to cloudy in the morning with some sunny spells at times – becoming cloudy with sunny spells spreading out in the afternoon. Period of sunshine close to 45%.
PRECIPITATION : isolated showers still possible in the morning – rain-snow limit dropping towards 1000 m – no precipitation in the afternoon.
WIND - ground level : variable light.
WIND - mid mountain : WNW light to moderate -> variable light.
WIND - high mountain : WNW moderate to strong -> W moderate.
TEMPERATURE : low -2°C - high +3°C.
ISOTHERM 0°C : 1400 -> 1200 -> 1600 m.
ISOTHERM -10°C : 3000 -> 3300 m.


chamonixmeteo.com

Overnight

OVERNIGHT
Cloudy, then partly cloudy – cold
SKY CONDITION : locally cloudy with clear spells early in the night – becoming clear or partly cloudy – persistent high cloud.
PRECIPITATION : none.
WIND - aloft : W moderate -> WSW light to moderate.
TEMPERATURE : low -5°C.

Tomorrow

MONDAY DECEMBER 31
Fairly sunny – cold in the morning – getting milder in the afternoon
SKY CONDITION : clear – becoming partly cloudy to cloudy – high cloud crossing over, thicker at night. Period of sunshine close to 85%.
PRECIPITATION : none.
WIND - aloft : WSW light to moderate -> SW moderate.
TEMPERATURE : low -5 °C - high +4°C.

Synopsis

Extended high area, Madeira to Black Sea, strengthening over the Alps today and probably reaching 1030 hpa over the area during the night. Last night’s weak cold front is followed by a cold tail which is expected to becoming almost stable in the afternoon. Keeping on to getting milder and sunny on Monday. Pressure field temporarily weakening on Tuesday and allowing for a fairly active disturbance to coming in by Tuesday afternoon and to moving away eastward by Wednesday morning. From Thursday, the Azores high is expected to gradually getting strength over the Western Alps.

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Today

TODAY – SATURDAY DECEMBER 29 2012
Sunny – cold in the morning – very mild in the afternoon with light f?hn wind
SKY CONDITION : clear or partly cloudy – thin high cloud. Period of sunshine close to 85%.
PRECIPITATION : none.
WIND - ground level : variable light to moderate – light afternoon f?hn wind likely.
WIND - mid mountain : S light -> moderate.
WIND - high mountain : N light to moderate -> variable light -> SSW moderate.
TEMPERATURE : low -5°C - high +6°C – temperature inversion toward 1400 m.
ISOTHERM 0°C : 3000 -> 2600 m.
ISOTHERM -10°C : 4200 -> 4500 -> 4200 m.


chamonixmeteo.com

Overnight

OVERNIGHT
Increasing cloud – getting colder – light snow
SKY CONDITION : partly cloudy at first – becoming cloudy to mostly cloudy.
PRECIPITATION : light shower towards the latter part of the night – rain-snow limit dropping towards 1000 m.
WIND - aloft : SSW moderate -> W moderate to strong.
TEMPERATURE : low 0°C.

Tomorrow

SUNDAY DECEMBER 30
Unsettled and cold morning – sunny spells spreading out in the afternoon
SKY CONDITION : mostly cloudy in the morning – becoming cloudy with sunny spells – partly cloudy at night. Period of sunshine close to 50%.
PRECIPITATION : light scattered shower early in the morning – snow towards 1000 m – dry later.
WIND - aloft : WNW moderate to strong -> NW moderate.
TEMPERATURE : low -1 °C - high +2°C.

Synopsis

High, 1034 hpa Northern Romania, drifting east while weakening, providing a sunny Saturday over the Alps, milder than seasonal average. Weak cold front expected to crossing over overnight and on Sunday morning driving a slightly unsettled condition on Sunday while getting noticeably colder. Again milder and sunny on Monday, then disturbance coming in on Tuesday afternoon and crossing over until Wednesday morning. From Thursday, the Azores high is expected to gradually getting strength over the Western Alps.To be confirmed.

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Today

TODAY – THURSDAY DECEMBER 27 2012
Very unsettled – snow then rain – NW gale high up
SKY CONDITION : overcast. Period of sunshine close to 0%.
PRECIPITATION : continuous – heavy at times in the afternoon and in the evening – rain-snow limit changing between 900 and 1400 m, dropping towards 1000 m at night – expected snowfall towards 1800 m : 25-45 m, windblown.
WIND - ground level : variable light.
WIND - mid mountain : W moderate -> NW moderate to strong.
WIND - high mountain : WSW strong -> NW gale.
TEMPERATURE : low 0°C - high +2°C.
ISOTHERM 0°C : 1200 -> 1600 -> 1100 m.
ISOTHERM -10°C : 2800 -> 3200 -> 2900 m.


chamonixmeteo.com

Overnight

OVERNIGHT
Snowy – gale high up
SKY CONDITION : overcast – becoming mostly cloudy.
PRECIPITATION : continuous and moderate or locally heavy early in the night – showers later, becoming scattered before dawn – rain-snow limit between 1000 and 800 m – expected snowfall towards 1500 m : 10-20 m, windblown.
WIND - aloft : NW -> NNW gale.
TEMPERATURE : low -1°C.

Tomorrow

FRIDAY DECEMBER 28
Improving sunny – strong wind high up in the morning – getting milder high up in the afternoon
SKY CONDITION : mainly cloudy early in the morning – becoming cloudy with sunny spells spreading out. Period of sunshine close to 60%.
PRECIPITATION : possible remaining snow showers early in the morning – dry later.
WIND - aloft : NNW gale -> moderate.
TEMPERATURE : low -1 °C - high +2°C.

Synopsis

High ridge 1034-1020 hpa de Madeira to Adriatic Sea. Extended low area, Northern Atlantic, British Isles and Scandinavia. High pressure gradient in-between driving a westerly gale towards the Alps with very unsettled condition. Minimum 995 hpa, Eastern England, moving east. Linked disturbance crossing over the area today and moving away eastward by Friday early morning. Gradually improving by Friday leading to a sunny and Saturday, much milder than seasonal average. Slightly unsettled on Sunday while getting noticeably colder. Again milder and probably sunny on Monday.

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Today

TODAY – WEDNESDAY DECEMBER 26 2012
Hazy sunshine at first, then disturbance coming in from the west – getting colder
SKY CONDITION : partly cloudy to cloudy – high cloud coming in from the west – becoming overcast later. Period of sunshine close to 40%.
PRECIPITATION : starting up towards the latter part of the afternoon – probably light – rain-snow limit towards 1900 m, dropping towards 1400 m.
WIND - ground level : variable light.
WIND - mid mountain : W -> NW light to moderate.
WIND - high mountain : W moderate to strong -> NW strong -> moderate.
TEMPERATURE : low +1°C - high +3°C.
ISOTHERM 0°C : 1400 -> 1200 -> 1400 m.
ISOTHERM -10°C : 3200 -> 2900 m.


chamonixmeteo.com

Overnight

OVERNIGHT
Increasing cloud – light precipitation towards the end of the night
SKY CONDITION : partly cloudy early in the night – becoming cloudy, then mostly cloudy to overcast by dawn.
PRECIPITATION : starting up towards the end of the night – light – rain-snow limit towards 1300 m, dropping.
WIND - aloft : NW moderate -> WNW strong.
TEMPERATURE : low +1°C.

Tomorrow

THURSDAY DECEMBER 27
Very unsettled – snow and rain – NW gale high up
SKY CONDITION : overcast. Period of sunshine close to 0%.
PRECIPITATION : continuous – heavy at times towards the latter part of the afternoon – rain-snow limit between 1000 and 1500 m – expected snowfall towards 1800 m : 20-40 m.
WIND - aloft : WNW strong -> NW gale.
TEMPERATURE : low -1 °C - high +3°C.

Synopsis

Extended low area, British Isles to Southern Scandinavia. Last night’s disturbance moving away eastwards followed by an unsettled and cold tail generating showers until the middle of the day. New disturbance expected from the west on Thursday and moving away eastward by Friday morning. Improving sunny and mild on Saturday. Probably slightly unsettled on Sunday while getting noticeably colder.

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Today

TODAY – TUESDAY DECEMBER 25 2012
Hazy sunshine at first, then disturbance coming in from the west – getting colder
SKY CONDITION : partly cloudy to cloudy – high cloud coming in from the west – becoming overcast later. Period of sunshine close to 25%.
PRECIPITATION : starting up towards the latter part of the afternoon – probably light – rain-snow limit towards 1900 m, dropping towards 1400 m.
WIND - ground level : variable light to moderate.
WIND - mid mountain : SSW light to moderate -> SW moderate.
WIND - high mountain : SW strong.
TEMPERATURE : low 0°C - high +5°C – temperature inversion toward 1500 m.
ISOTHERM 0°C : 2600 -> 1900 m.
ISOTHERM -10°C : 4100 -> 3500 m.


chamonixmeteo.com

Overnight

OVERNIGHT
Rainy
SKY CONDITION : overcast or mostly cloudy.
PRECIPITATION : moderate at times early in the night, then light – rain-snow limit towards 1400 m, dropping towards 1200 m.
WIND - aloft : SW strong -> WSW moderate to strong.
TEMPERATURE : low +1°C.

Tomorrow

WEDNESDAY DECEMBER 26
Unsettled and colder – frequent showers – strong wind high up
SKY CONDITION : mostly cloudy to overcast – becoming cloudy with fleeting sunny spells in the afternoon. Period of sunshine close to 20%.
PRECIPITATION : frequent showers in the morning – becoming scattered – rain-snow limit between 900 and 1200 m – expected snowfall towards 1800 m : 10-20 m.
WIND - aloft : WSW -> NW moderate to strong.
TEMPERATURE : low 0 °C - high +2°C.

Synopsis

Extended low area, British Isles to Southern Scandinavia with minimum 978 hpa, Baltic Sea, moving northeast. Linked cold front expected to coming in towards the latter part or the afternoon followed by an unsettled and cold tail generating showers by Wednesday. New disturbance expected to crossing over the area from the west on Thursday and moving away eastward by Friday morning. Improving sunny and mild on Saturday.

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Today

TODAY – MONDAY DECEMBER 24 2012
Fairly sunny – very mild with f?hn wind puffs in the afternoon
SKY CONDITION : clear in the morning – becoming partly cloudy – high cloud crossing over in the afternoon. Period of sunshine close to 75%.
PRECIPITATION : none.
WIND - ground level : variable light – possible f?hn wind puffs in the afternoon.
WIND - mid mountain : SW light -> S light to moderate.
WIND - high mountain : WSW modéré à fort -> SW fort.
TEMPERATURE : low 0°C - high +11°C – temperature inversion toward 1500 m.
ISOTHERM 0°C : 3200 m.
ISOTHERM -10°C : 4700 -> 4500 m.


chamonixmeteo.com

Overnight

OVERNIGHT
Cloudy at times – milder than seasonal average – gusty f?hn wind
SKY CONDITION : partly cloudy – high cloud – cloudy at times at first and towards the end of the night.
PRECIPITATION : none.
WIND - aloft : SW moderate to strong -> strong – gusty f?hn wind likely in the valley.
TEMPERATURE : low +4°C.

Tomorrow

TUESDAY DECEMBER 25
Sunny spells at first, then disturbance coming in from the west – getting colder
SKY CONDITION : cloudy with sunny spells in the morning – becoming overcast from the west later. Period of sunshine close to 30%.
PRECIPITATION : starting up during the afternoon – probably light – rain-snow limit towards 1900 m, dropping towards 1400 m.
WIND - aloft : SW strong – morning f?hn wind likely in the valley.
TEMPERATURE : low +2 °C - high +4°C.

Synopsis

Extended low area, south of Iceland to Southern Scandinavia. High 1028-1023 hpa, Maghreb to Northern Italy, driving very mild african air towards the Alps high up. Mild atmosphere is therefore persisting today. The whole pattern is drifting east, expected to triggering a f?hn wind spell overnight and by Tuesday morning, ahead of a snowy disturbance coming in by Tuesday evening. The unsettled Atlantic stream setting up by then should persist until the end of the week with temperatures slightly higher than seasonal average.

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Today

TODAY – SUNDAY DECEMBER 23 2012
Fairly sunny and very mild – slightly decreasing wind high up
SKY CONDITION : cloudy to partly cloudy – high cloud crossing over, fairly thick in the morning. Period of sunshine close to 65%.
PRECIPITATION : none.
WIND - ground level : variable light.
WIND - mid mountain : WNW light to moderate.
WIND - high mountain : WNW strong -> moderate to strong.
TEMPERATURE : low +1°C - high +10°C – temperature inversion toward 1500 m.
ISOTHERM 0°C : 2900 -> 3200 m.
ISOTHERM -10°C : 4400 -> 4600 m.


chamonixmeteo.com

Overnight

OVERNIGHT
Hazy sky, clearing – milder than seasonal average high up
SKY CONDITION : partly cloudy at first – thin high cloud crossing over – probably clear towards the end of the night.
PRECIPITATION : none.
WIND - aloft : WNW -> WSW moderate to strong.
TEMPERATURE : low +2°C.

Tomorrow

MONDAY DECEMBER 24
Fairly sunny – very mild – f?hn wind likely
SKY CONDITION : partly cloudy – thin high cloud crossing over – thicker at night. Period of sunshine close to 85%.
PRECIPITATION : none.
WIND - aloft : WSW modéré à fort -> SW fort – afternoon f?hn wind likely in the valley.
TEMPERATURE : low +2 °C - high +14°C.

Synopsis

Extended low area, Northern Atlantic, minimum 968 hpa south of Iceland. High 1027-1023 hpa, Maghreb to Northern Italy, driving very mild african air northward high up, thus causing very mild and sunny condition today and on Monday. The whole pattern is drifting east, probably triggering a f?hn wind spell between Monday afternoon and Tuesday morning, possibly fairly strong, ahead of a snowy disturbance expected by Tuesday evening. The unsettled Atlantic stream setting up by then should persist until the end of the week with temperatures slightly higher than seasonal average.

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Today

TODAY – SATURDAY DECEMBER 22 2012
Fairly sunny in the morning – getting milder – rainy disturbance later – strong wind high up
SKY CONDITION : gradually hazy sunshine in the morning – becoming quickly overcast from noon. Period of sunshine close to 35%.
PRECIPITATION : starting up towards the latter part of the afternoon – becoming moderate to heavy – rain-snow limit towards 1000 m, rising up quickly.
WIND - ground level : variable light.
WIND - mid mountain : variable -> W light.
WIND - high mountain : NNW -> NW strong.
TEMPERATURE : low -5°C - high +4°C – temperature inversion toward 1500 m.
ISOTHERM 0°C : 1500 -> 2500 m.
ISOTHERM -10°C : 3200 -> 4200 m.


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Overnight

OVERNIGHT
Rainy at first – improving later – windy and mild high up
SKY CONDITION : overcast or mostly cloudy at first – becoming cloudy with clear spells towards the latter part of the night.
PRECIPITATION : moderate to strong in the first part of the night – rain-snow limit rising up towards 2000 m – precipitation ending towards the middle of the night – expected snowfall towards 2500 m : 15-35 cm, windblown.
WIND - aloft : NW strong.
TEMPERATURE : low +3°C.

Tomorrow

SUNDAY DECEMBER 23
Fairly sunny and very mild – slightly decreasing wind high up
SKY CONDITION : partly cloudy – high cloud crossing over. Period of sunshine close to 65%.
PRECIPITATION : none.
WIND - aloft : NW strong -> W moderate to strong.
TEMPERATURE : low +3 °C - high +10°C.

Synopsis

Extended low system, Northern Atlantic, driving a northwesterly stream towards the Alps, at times unsettled and humid. Temporary high ridge from the southwest reaching 1020 hpa over Switzerland in the morning, weakening quickly in the afternoon. Current lull leaving an active warm front to crossing over the area in the first part of the night. F?hn wind period likely between Monday afternoon and during the following night, possibly fairly strong, ahead of a snowy disturbance by Tuesday afternoon. Then, the unsettled Atlantic stream should persist until Thursday with temperatures matching seasonal average.

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Today

TODAY – FRIDAY DECEMBER 21 2012
Changeable – sunny spells – getting slightly milder – evening shower slight risk
SKY CONDITION : locally mostly cloudy early in the morning – becoming cloudy with sunny spells – increasing cloud again towards the latter part of the afternoon. Period of sunshine close to 40%.
PRECIPITATION : late afternoon shower slight risk – rain-snow limit towards 1100 m.
WIND - ground level : variable light.
WIND - mid mountain : NW -> NNW light to moderate.
WIND - high mountain : NW moderate.
TEMPERATURE : low +1°C - high +3°C.
ISOTHERM 0°C : 1300 -> 1500 -> 1300 m.
ISOTHERM -10°C : 3000 m.


chamonixmeteo.com

Overnight

OVERNIGHT
Changeable – clear spell while getting colder before dawn
SKY CONDITION : locally mostly cloudy at first – becoming cloudy with sunny spells.
PRECIPITATION : none.
WIND - aloft : NW moderate -> NNW strong.
TEMPERATURE : low -5°C – temperature inversion toward 1500 m.

Tomorrow

SATURDAY DECEMBER 22
Getting considerably milder – active disturbance crossing over – heavy rain at night – strong wind high up
SKY CONDITION : hazy sunshine in the morning – becoming quickly overcast towards the middle of the day. Period of sunshine close to 25%.
PRECIPITATION : starting up during the afternoon – becoming moderate to heavy – rain-snow limit towards 1200 m, probably rising up towards 2000 m.
WIND - aloft : NNW -> NW strong.
TEMPERATURE : low -5 °C - high +3°C – temperature inversion toward 1500 m.

Synopsis

Extended low system, Northern Atlantic, 977 hpa southeast of Groenland and 1000 hpa over England, driving an unsettled and humid stream over Western Europe. Minimum 1003 hpa, Biscaye. Linked disturbance expected to disintegrating before reaching the Alps as pressure field is rising from the southwest today. Which lull lasting until Saturday morning. Then, active disturbance fed with mild air crossing over the area between Saturday afternoon and Sunday morning. F?hn wind period likely between Monday morning and Tuesday morning, possibly fairly strong, ahead of a probably snowy disturbance expected on Tuesday.

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Today

TODAY – THURSDAY DECEMBER 20 2012
Overcast or mostly cloudy – becoming rainy
SKY CONDITION : mostly cloudy – thick high cloud – possible fleeting sunny spell towards the middle of the day, then becoming overcast in the afternoon. Period of sunshine close to 10%.
PRECIPITATION : light snow showers in the morning – probably dry towards the middle of the day – precipitation resuming during the afternoon as rain, becoming locally moderate – rain-snow limit towards 800 m, rising up towards 1500 m at night – expected snowfall towards 2000 m : 15-25 cm.
WIND - ground level : variable light.
WIND - mid mountain : S -> variable light.
WIND - high mountain : SW light to moderate -> WSW moderate.
TEMPERATURE : low -6°C - high +3°C – temperature inversion toward 1500 m.
ISOTHERM 0°C : 1500 -> 1800 m.
ISOTHERM -10°C : 3500 -> 3700 m.


chamonixmeteo.com

Overnight

OVERNIGHT
Rainy – possible snow showers by dawn
SKY CONDITION : overcast, then mostly cloudy.
PRECIPITATION : moderate, then light – showers later – rain-snow limit towards 1500 m, dropping towards 1000 m – expected snowfall towards 2000 m : 15-20 cm.
WIND - aloft : WSW -> WNW moderate.
TEMPERATURE : low -1°C.

Tomorrow

FRIDAY DECEMBER 21
Changeable – showers, then sunny spells
SKY CONDITION : mostly cloudy – cloudy at times with sunny spells in the afternoon. Period of sunshine close to 35%.
PRECIPITATION : remaining shower early in the morning – rain-snow limit towards 1000 m – dry later.
WIND - aloft : WNW moderate -> NNW moderate to strong.
TEMPERATURE : low -1 °C - high +3°C.

Synopsis

Extended low system, Northern Atlantic, 964 hpa southeast of Groenland – 1000 hpa Wales, extending east. Linked warm front coming in over the area today together with light precipitation, becoming moderate towards the evening while snow limit is expected to rising towards 1500 m. Relative lull on Friday, then new disturbance, very active, crossing over the area between Saturday afternoon and Sunday morning in a very mild atmosphere. Then, f?hn wind period likely on Monday ahead of a probably snowy disturbance expected on Tuesday.

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Today

TODAY – WEDNESDAY DECEMBER 19 2012
Skies becoming hazy – cold in the morning – getting noticeably milder in the afternoon
SKY CONDITION : partly cloudy early in the morning – becoming cloudy from the west – thickening high cloud – white-out in the afternoon. Period of sunshine close to 50%.
PRECIPITATION : none.
WIND - ground level : variable light.
WIND - mid mountain : variable -> SW light.
WIND - high mountain : NNW strong to gale force -> NW moderate to strong.
TEMPERATURE : low -6°C - high +3°C.
ISOTHERM 0°C : 1000 -> 2200 m.
ISOTHERM -10°C : 3500 -> 4000 m.


chamonixmeteo.com

Overnight

OVERNIGHT
Overcast – milder than seasonal average
SKY CONDITION : mostly cloudy, then overcast.
PRECIPITATION : probably none before the end of the night.
WIND - aloft : NW moderate to strong -> WSW light to moderate.
TEMPERATURE : low +1°C.

Tomorrow

THURSDAY DECEMBER 20
Overcast or mostly cloudy – light rain – snow towards 1500 m
SKY CONDITION : overcast or mostly cloudy – possible fleeting sunny spell in the afternoon. Period of sunshine close to 10%.
PRECIPITATION : light, starting up early in the morning – locally moderate in the afternoon – rain-snow limit towards 1200 m, rising up towards 1500 m – expected snowfall towards 2000 m : 15-25 cm.
WIND - aloft : WSW light to moderate -> moderate.
TEMPERATURE : low +1 °C - high +4°C.

Synopsis

Temporary high ridge 1025-1020, Morocco to Germany, drifting east and triggering a short lull over the Alps today. Deep low system, currently mid-Northern Atlantic, moving towards Europe and driving a new series of westerly disturbances in a fairly milder atmosphere than seasonal average. The first one is expected to crossing over the area between Thursday evening and Friday evening. A second one is expected to crossing over by Saturday and Sunday. Then, f?hn wind period likely on Monday.

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Today

TODAY – TUESDAY DECEMBER 18 2012
Gloomy morning – snow showers – possible fleeting sunny spells in the afternoon
SKY CONDITION : overcast or mostly cloudy – possible fleeting sunny spells in the afternoon. Period of sunshine close to 10%.
PRECIPITATION : showers – becoming scattered later – rain-snow limit towards 800 m – expected snowfall towards 1000 m : 5-10 cm.
WIND - ground level : variable light.
WIND - mid mountain : mainly W – light to moderate.
WIND - high mountain : NW strong -> NNW strong to gale force.
TEMPERATURE : low -1°C - high +1°C.
ISOTHERM 0°C : 1000 -> 1100 m.
ISOTHERM -10°C : 2800 m.


chamonixmeteo.com

Overnight

OVERNIGHT
Improving – clear and cold by dawn – very strong wind high up
SKY CONDITION : mostly cloudy to cloudy in the first part of the night – becoming clear or partly cloudy.
PRECIPITATION : scattered snow showers still possible in the first part of the night.
WIND - aloft : NNW gale.
TEMPERATURE : low -6°C.

Tomorrow

WEDNESDAY DECEMBER 19
Fairly sunny – cold in the morning – getting noticeably milder in the afternoon
SKY CONDITION : clear or partly cloudy in the morning – high cloud coming in from the west in the afternoon. Period of sunshine close to 75%.
PRECIPITATION : none.
WIND - aloft : NNW strong to gale force -> NW moderate to strong.
TEMPERATURE : low -7 °C - high +3°C.

Synopsis

Low 1003 hpa, east of England, still driving a strong unsettled and humid westerly stream over the Alps today. High 1026, Spain, extending a ridge reaching Switzerland towards 1022 hpa overnight. Therefore, temporary fairly sunny condition is expected on Wednesday. New disturbances crossing over thereafter and until the beginning of next week in a fairly milder atmosphere than seasonal average.

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Today

TODAY – MONDAY DECEMBER 17 2012
Frequent shower – snow dropping towards 800 m
SKY CONDITION : overcast or mostly cloudy. Period of sunshine close to 0%.
PRECIPITATION : showers – locally moderate – rain-snow limit changing between 1100 and 1000 m, dropping towards 800 m at night – expected snowfall towards 1500 m : 10-20 cm.
WIND - ground level : variable light.
WIND - mid mountain : mainly W – light to moderate.
WIND - high mountain : W moderate – moderate to strong at times.
TEMPERATURE : low -1°C - high +1°C.
ISOTHERM 0°C : 1200 -> 1300 -> 1100 m.
ISOTHERM -10°C : 2900 -> 2800 m.


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Overnight

OVERNIGHT
Snow showers
SKY CONDITION : overcast or mostly cloudy.
PRECIPITATION : showers – locally moderate – rain-snow limit dropping towards 700 m – expected snowfall towards 1000 m : 5-15 cm.
WIND - aloft : W moderate -> NW moderate to strong.
TEMPERATURE : low -2°C.

Tomorrow

TUESDAY DECEMBER 18
Slightly colder – snow showers
SKY CONDITION : mostly cloudy – possible fleeting sunny spells in the afternoon. Period of sunshine close to 5%.
PRECIPITATION : showers – becoming scattered later – rain-snow limit towards 700 m – expected snowfall towards 1000 m : 5-10 cm.
WIND - aloft : NW moderate to strong -> NNW strong to gale force.
TEMPERATURE : low -2 °C - high 0°C.

Synopsis

Extended low area, northwest of England to Northern Italy, driving a very unsettled westerly then northwesterly tail over the Alps liable to generate fairly heavy showers. Which unsettled and fairly mild stream is expected to persisting, gradually colder until Tuesday. Improving on Wednesday and until Thursday morning. New disturbances expected to crossing over thereafter and until the beginning of next week.

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Today

TODAY – SUNDAY DECEMBER 16 2012
Very unsettled – strong wind high up – showers
SKY CONDITION : mostly cloudy – possible fleeting sunny spells in the afternoon. Period of sunshine close to 10%.
PRECIPITATION : showers – rain-snow limit changing between 1100 and 1300 m – expected snowfall towards 1500 m : 5-15 cm.
WIND - ground level : variable light.
WIND - mid mountain : SW light to moderate.
WIND - high mountain : W -> WNW strong – moderate to strong at times.
TEMPERATURE : low +1°C - high +4°C.
ISOTHERM 0°C : 1600 -> 1500 m.
ISOTHERM -10°C : 3100 -> 3000 m.


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Overnight

OVERNIGHT
Very unsettled – locally heavy showers
SKY CONDITION : mostly cloudy.
PRECIPITATION : showers – probably more frequent and locally heavy with possible thunderstorm towards the middle of the night – rain-snow limit dropping towards 1000 m – expected snowfall towards 1500 m : 20-30 cm.
WIND - aloft : mainly W moderate to strong – moderate at times.
TEMPERATURE : low 0°C.

Tomorrow

MONDAY DECEMBER 17
Frequent shower – snow towards 900 m
SKY CONDITION : mostly cloudy – possible fleeting sunny spells. Period of sunshine close to 5%.
PRECIPITATION : frequent showers – rain-snow limit dropping towards 1000 m, dropping towards 900 m – expected snowfall towards 1500 m : 20-30 cm.
WIND - aloft : mainly W moderate to strong.
TEMPERATURE : low 0 °C - high +3°C.

Synopsis

Extended deep low area, south of Iceland to North Sea driving a very unsettled westerly tail over the Alps liable to generate heavy showers. Which unsettled and fairly mild stream is expected to persisting, gradually colder until Tuesday. Probably not improving before Wednesday.

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Today

TODAY – SATURDAY DECEMBER 15 2012
Very unsettled – frequent showers – strong wind high up – getting slightly colder
SKY CONDITION : mostly cloudy – possible fleeting sunny spells. Period of sunshine close to 10%.
PRECIPITATION : light and continuous in the morning, then showers – scattered but locally heavy in the afternoon – rain-snow limit changing between 1000 and 1300 m – expected snowfall towards 1800 m : 20-30 cm, windblown.
WIND - ground level : variable light to moderate.
WIND - mid mountain : W -> SW moderate – locally moderate to strong.
WIND - high mountain : WSW -> W strong.
TEMPERATURE : low 0°C - high +4°C.
ISOTHERM 0°C : 1800 -> 1700 m.
ISOTHERM -10°C : 3500 -> 3200 m.


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Overnight

OVERNIGHT
Mixed rain and snow – getting slightly colder – gale high up
SKY CONDITION : mostly cloudy.
PRECIPITATION : showers – probably very frequent towards the end of the night – rain-snow limit changing between 1000 and 1200 m – expected snowfall towards 1800 m : 20-30 cm, windblown.
WIND - aloft : W strong – gale at times.
TEMPERATURE : low +1°C.

Tomorrow

SUNDAY DECEMBER 16
Very unsettled – strong wind high up – showers – getting colder
SKY CONDITION : mostly cloudy – possible fleeting sunny spells. Period of sunshine close to 10%.
PRECIPITATION : frequent showers in the morning – becoming scattered later – rain-snow limit dropping towards 1000 m.
WIND - aloft : W strong -> WNW moderate to strong.
TEMPERATURE : low +2 °C - high +4°C.

Synopsis

Extended low area over the Northern Atlantic Ocean. Satellite minimum 967 hpa, North Sea, moving north. Linked cold front crossing over the Alps in the morning, followed by a very unsettled tail generating heavy showers. Unsettled and fairly mild westerly to northwesterly stream thereafter, expected to persisting, gradually colder until Tuesday. Probably not improving before Wednesday.

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Today

TODAY – FRIDAY DECEMBER 14 2012
Very unsettled – getting milder – locally strong f?hn wind – gale high up
SKY CONDITION : mostly cloudy – cloudy with sunny spells at times – becoming overcast at night. Period of sunshine close to 15%.
PRECIPITATION : risk of shower running over from the south – rain-snow limit towards 1500 m, rising.
WIND - ground level : gusty f?hn wind – locally strong.
WIND - mid mountain : SSE -> SW moderate – locally moderate to strong.
WIND - high mountain : W moderate to strong -> SW strong to gale force.
TEMPERATURE : low +1°C - high +5°C.
ISOTHERM 0°C : 1600 -> 2200 m.
ISOTHERM -10°C : 3600 -> 4200 m.


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Overnight

OVERNIGHT
Becoming rainy – gale high up
SKY CONDITION : overcast or mostly cloudy.
PRECIPITATION : showers at first – then, continuous rain – rain-snow limit rising temporarily up towards 1800 m – expected snowfall towards 2000 m : 25-40 cm, windblown.
WIND - aloft : SW gale.
TEMPERATURE : low +3°C.

Tomorrow

SATURDAY DECEMBER 15
Very unsettled – gale high up – showers – getting colder
SKY CONDITION : mostly cloudy to overcast – possible fleeting sunny spells. Period of sunshine close to 5%.
PRECIPITATION : continuous and locally heavy in the morning – showers likely later – rain-snow limit towards 1400 m – expected snowfall towards 1800 m : 25-50 cm, windblown.
WIND - aloft : SW gale -> WSW strong to gale force.
TEMPERATURE : low +2 °C - high +4°C.

Synopsis

Very deep low 955 hpa far southeast of Greenland, drifting slightly east, driving a strong and fairly mild SW Atlantic stream high up towards the Alps. F?hn wind spell today slowing down the rainy disturbance income over the area until overnight. Unsettled and fairly mild westerly stream thereafter, expected to persisting for some days, gradually colder until Tuesday.

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Today

TODAY – THURSDAY DECEMBER 13 2012
Very cold in the morning – increasing cloud – getting noticeably milder in the afternoon
SKY CONDITION : partly cloudy to cloudy in the morning – becoming gradually overcast – thickening high cloud. Period of sunshine close to 30%.
PRECIPITATION : light snow showers likely towards the end of the afternoon – rain-snow limit towards 700 m, rising.
WIND - ground level : variable light.
WIND - mid mountain : S -> SSE light.
WIND - high mountain : W -> SW moderate.
TEMPERATURE : low -12°C - high 0°C – temperature inversion toward 1500 m.
ISOTHERM 0°C : 1300 -> 1500 m.
ISOTHERM -10°C : 2800 -> 3000 m.


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Overnight

OVERNIGHT
Mainly cloudy – some showers – getting milder
SKY CONDITION : overcast or mostly cloudy.
PRECIPITATION : showers – becoming isolated towards the end of the night – rain-snow limit between 800 and 1200 m – expected snowfall towards 1800 m : 5-10 cm.
WIND - aloft : W moderate -> SW -> WNW moderate to strong.
TEMPERATURE : low -3°C.

Tomorrow

FRIDAY DECEMBER 14
Getting milder – f?hn wind likely – showers resuming later – strong wind high up
SKY CONDITION : mostly cloudy – cloudy with sunny spells at times – becoming overcast at night. Period of sunshine close to 15%.
PRECIPITATION : showers resuming at night – rain-snow limit towards 1400 m.
WIND - aloft : WNW moderate to strong -> SW strong.
TEMPERATURE : low -3 °C - high +3°C.

Synopsis

High 1028 hpa, Croatia, drifting east while strengthening. Very deep low 957 hpa southeast of Greenland, drifting east. Very cold air high up, Scandinavia to Alps, becoming quickly milder from the west today. Cloudy deterioration today, possible shower overnight, then f?hn wind spell by Friday ahead of an unsettled and fairly mild westerly stream expected to persisting at least until the middle of next week.

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Today

TODAY – WEDNESDAY DECEMBER 12 2012
Sunny and very cold – getting milder high up in the afternoon
SKY CONDITION : clear or partly cloudy – thin high cloud from the west in the afternoon. Period of sunshine close to 95%.
PRECIPITATION : none.
WIND - ground level : variable light or nil.
WIND - mid mountain : variable light -> S light to moderate.
WIND - high mountain : NW moderate to strong -> WNW moderate.
TEMPERATURE : low -15°C - high -4°C – temperature inversion toward 1500 m.
ISOTHERM 0°C :  1300 m.
ISOTHERM -10°C : 2500 -> 2800 m.


chamonixmeteo.com

Overnight

OVERNIGHT
Hazy sky – very cold down in the valley
SKY CONDITION : partly cloudy – becoming locally cloudy towards the end of the night – thickening high cloud.
PRECIPITATION : none.
WIND - aloft : WNW moderate.
TEMPERATURE : low -13°C – temperature inversion toward 1400 m.

Tomorrow

THURSDAY DECEMBER 13
Increasing cloud – getting milder – probably dry
SKY CONDITION : partly cloudy to cloudy in the morning – becoming gradually overcast – thickening high cloud. Period of sunshine close to 25%.
PRECIPITATION : probably none or snow flurries towards the evening.
WIND - aloft : WNW -> SW moderate.
TEMPERATURE : low -12 °C - high +1°C – temperature inversion toward 1400 m.

Synopsis

High 1028 hpa, France, drifting southeast while weakening. Very cold air high up, Scandinavia to Alps, becoming milder from the west. Sunny, stable and very cold spell today although starting up to getting slightly milder high up. Becoming noticeably milder by Thursday. Then unsettled and fairly mild westerly stream setting up from Thursday evening and probably persisting until Tuesday.

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Today

TODAY – TUESDAY DECEMBER 11 2012
Changeable and cold – light snow showers, then sunny spells
SKY CONDITION : mostly cloudy – becoming cloudy with sunny spells during the afternoon. Period of sunshine close to 25%.
PRECIPITATION : scattered light showers in the morning – expected snowfall towards 1000 m : < 5 cm.
WIND - ground level : variable light.
WIND - mid mountain : NNW light to moderate -> light.
WIND - high mountain : NNW moderate -> N strong.
TEMPERATURE : low -5°C - high -3°C.
ISOTHERM 0°C :  500 m.
ISOTHERM -10°C : 2000 -> 2200 m.


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Overnight

OVERNIGHT
Clear and very cold
SKY CONDITION : cloudy at first – becoming clear or partly cloudy – possible low cloudy towards the end of the night.
PRECIPITATION : none.
WIND - aloft : N strong -> NNW moderate to strong.
TEMPERATURE : low -11°C.

Tomorrow

WEDNESDAY DECEMBER 12
Sunny and very cold – getting milder high up in the afternoon
SKY CONDITION : possible early morning low cloud in the valley – otherwise clear or partly cloudy. Period of sunshine close to 90%.
PRECIPITATION : none.
WIND - aloft : NNW moderate to strong -> NW moderate.
TEMPERATURE : low -11 °C - high -4°C.

Synopsis

Extended low area 1007-1003 hpa, Poland to Southern Adriatic sea with very cold and unsettled polar air high up, drifting east in its southern part. High 1033 hpa, British Isles, drifting southeast and reaching Central Germany by Wednesday. Still some instability from the north in the morning, then more stable and fair period by Wednesday and Thursday while becoming noticeably milder. Unsettled and milder westerly stream setting up from Thursday evening and probably persisting until the beginning of next week.

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Chamonix Green & White

2012