CHAMONIX VALLEY AND MONT-BLANC AREA WEATHER FORECAST


Matsuo Bashō
First celebrate
The flowers in your heart
Confined in winter
ISSUED AT 18:50 ON FRIDAY JANUARY 30, 2015
VALID FROM : FRIDAY JANUARY 30 2015 -- UNTIL : THURSDAY FEBRUARY 5 2015

GENERAL SYNOPSIS
The Atlantic high will stay « parked » over the Azores for several days. A complex low system, swiveling between North Sea and Northern Italy, allows very unsettled polar air to streaming up to the Mediterranean either at times on a west track over Western France and the Pyrénées, or some other times on an east track over Eastern France and the Alps. The resulting snow showers pattern, make them usually more frequent towards the latter part of the afternoon, their intensity depending on the barrier effect against the northern slopes. This often very unsettled weather, and colder than seasonal average, is expected to persisting until the end of the week-end. Improving fairly sunny on Monday. Very uncertain from Tuesday.
FRIDAY EVENING JANUARY 30 - AND OVERNIGHT
Unsettled winter weather continues - scattered snow showers
SKY CONDITION : mostly cloudy - fleeting clear spells.
PRECIPITATIONradarlive precipitation over the Alps : scattered snow showers, mostly light, more frequent in the first par of the night - expected snowfall towards 1500 m : 5-10 cm.
WIND - ground level : variable light.
WIND - mid mountain : NW moderate -> S light.
WIND - high mountain : WNW moderate to strong -> W light to moderate - very turbulent.
TEMPERATURE : low -5°C.
ISOTHERM 0°C : < 500 m.
ISOTHERM -10°C : 2100 m.
Uncertain.
ROAD CONDITION  : @ 06:30, roadways are locally snow covered.morelive precipitation radar over the Alps
TOMORROW - SATURDAY JANUARY 31
Very unsettled ‑ cold ‑ snow showers - fleeting sunny spells
SKY CONDITION : mostly cloudy - fleeting sunny spells. period of sunshine close to 20%.
PRECIPITATION : probably dry in the morning - scattered snow showers in the afternoon, moderate at times - expected snowfall towards 1500 m : 5-15 cm.
WIND - ground level : variable light.
WIND - mid mountain : S -> variable light.
WIND - high mountain : W light to moderate - moderate at times.
TEMPERATURE : low -5°C - high -2°C.
ISOTHERM 0°C : < 500 m.
ISOTHERM -10°C : 2100 -> 2300 m.
Uncertain.
SATURDAY TO SUNDAY NIGHT - JANUARY 31 TO FEBRUARY 1
Cold - snow showers - fleeting clear spells
SKY CONDITION  : overcast or mostly cloudy with fleeting clear spells.
PRECIPITATION : snow showers - light to moderate - expected snowfall towards 1500 m : 10-15 cm.
WIND - aloft : W -> NNW light to moderate.
TEMPERATURE : low -6°C.
Uncertain.
SUNDAY FEBRUARY 1
Mainly cloudy ‑ very cold ‑ light precipitation, yet continuous
SKY CONDITION : mostly cloudy - clear spell likely towards the latter part of the afternoon. Period of sunshine close to 15%.
PRECIPITATION : light and continuous during most of the day - becoming scattered in the evening - rain-snow limit below 500 m - expected snowfall towards 1500 m : 5-10 cm.
WIND - aloft : NNW light to moderate -> moderate.
TEMPERATURE : low -6 °C - high -1°C.
Uncertain.
MONDAY FEBRUARY 2
Scarce snow showers in the morning ‑ fair sunny spells later ‑ windy high up
SKY CONDITION : mostly cloudy early in the morning - becoming cloudy with sunny spells. Period of sunshine close to 55%.
PRECIPITATION : isolated snow showers early in the morning - dry later.
WIND - aloft : NW strong -> moderate to strong.
TEMPERATURE : low -5°C - high -1°C.
Uncertain.
EXTENDED OUTLOOK UNTIL THURSDAY FEBRUARY 5

Tuesday to Thursday : very uncertain - low possibly crossing over France from Biscaye towards the Mediterranean, and causing slight thaw, driving precipitation, then backing cloud from the east.

Forecast reliability : poor.

ReportsAs a reminder, today in Chamonix, the sun rises at 07:55:28 and goes down at 17:36:29.
45.55 N 6.51 E - Altitude 1040 m
31 January 08:00
Temperature -8°C
Relative humidity 90%
Wind 0 km/h
Sea level pressure 986 hpa - steady
Pressure at 1042 m 867 mb
Precipitation last 6h 0.0 mm
Skies clear
Visibility 75000 m
Altitude 3845 m
31 January 07:00
Temperature -24°C
Wind W 40 km/h
Altitude 2250 m
31 January 06:00
Snow depth 55 cm
Wind 15 km/h
Gusts 20 km/h
Temperature -14°C