CHAMONIX VALLEY AND MONT-BLANC AREA WEATHER FORECAST


Iida Dakotsu
All in calmness—
The earth with half-opened eyes
Moves into the winter
ISSUED AT 19:30 ON SATURDAY NOVEMBER 15, 2014
VALID FROM : SATURDAY NOVEMBER 15 -- UNTIL : FRIDAY NOVEMBER 21 2014

GENERAL SYNOPSIS
Low 992 hpa southwest close to Brittany, linked to cold and unsettled air high up, drifting slightly southeast. It is still driving a southerly stream high up in the evening and carrying precipitation, gradually lighter in the first part of the night although with a rain-snow limit possibly getting below 1200 m. Improving somewhat later in the night and on Sunday morning, although the low and unsettled pattern is expected to ruling until Monday evening or even Tuesday morning. Pressure rise from the south over the Alps on Tuesday and Wednesday, triggering a more noticeable improvement. High condition on Thursday and Friday. Further outlook is very uncertain for now.
SATURDAY EVENING NOVEMBER 15 - AND OVERNIGHT
Rainy at first - improving somewhat before dawn
SKY CONDITION : overcast - becoming mostly cloudy or locally cloudy towards the end of the night.
PRECIPITATION : locally moderate in the first part of the night - changing to scattered showers - rain-snow limit dropping towards 1100 m, locally.
WIND - ground level : variable light.
WIND - mid mountain : variable light -> SW light to moderate.
WIND - high mountain : S -> WSW light to moderate.
TEMPERATURE : low +1°C.
ISOTHERM 0°C : 1600 -> 1400 -> 1700 m.
ISOTHERM -10°C : 3500 -> 3000 -> 3200 m.
Uncertain.
TOMORROW - SUNDAY NOVEMBER 16
Mainly cloudy with shower risk - cloudy with sunny spells at times
SKY CONDITION : locally mostly cloudy in the morning and towards the latter part of the afternoon - otherwise cloudy with sunny spells. period of sunshine close to 25%.
PRECIPITATION : shower risk, slightly higher towards the latter part of the afternoon - rain-snow limit between 1300 and 1500 m.
WIND - ground level : variable light.
WIND - mid mountain : SW light to moderate.
WIND - high mountain : WSW light to moderate -> SW moderate.
TEMPERATURE : low +1°C - high +8°C.
ISOTHERM 0°C : 1700 -> 1800 m.
ISOTHERM -10°C : 3200 m.
Uncertain.
SUNDAY TO MONDAY NIGHT - NOVEMBER 16 TO 17
Changeable - possible snow showers
SKY CONDITION  : mostly cloudy - at times cloudy wigh clear spells.
PRECIPITATION : shower risk - rain-snow limit between 1000 and 1300 m.
WIND - aloft : SW moderate - moderate to strong at times.
TEMPERATURE : low 0°C.
Uncertain.
MONDAY NOVEMBER 17
Changeable - fleeting sunny spells and light showers in turn
SKY CONDITION : cloudy with fleeting sunny spells - mostly cloudy at times. Period of sunshine close to 25%.
PRECIPITATION : shower risk - rain-snow limit towards 1300 m.
WIND - aloft : SW moderate -> S -> W light.
TEMPERATURE : low 0 °C - high +6°C.
Very uncertain.
TUESDAY NOVEMBER 18
Cold weather - morning cloud - sunny spells spreading out later
SKY CONDITION : cloudy or locally mostly cloudy in the morning - becoming cloudy with sunny spells spreading out in the afternoon. Period of sunshine close to 45%.
PRECIPITATION : probably none.
WIND - aloft : W -> NW light to moderate - strong overnight.
TEMPERATURE : low 0°C - high +5°C.
Very uncertain.
EXTENDED OUTLOOK UNTIL FRIDAY NOVEMBER 21 2014

Wednesday : fairly sunny ‑ windy high up - getting milder. Thursday and Friday : fairly sunny - mild on sunny slopes in the afternoon.

Forecast reliability : poor.

ReportsAs a reminder, today in Chamonix, the sun rises at 07:41:27 and goes down at 16:55:31.
45.55 N 6.51 E - Altitude 1040 m
20 November 08:00
Temperature -2°C
Relative humidity 95%
Wind 0 km/h
Sea level pressure 1024 hpa - steady
Pressure at 1042 m 903 mb
Precipitation last 6h 0.0 mm
Skies partly cloudy
Visibility 70000 m
Altitude 3845 m
20 November 08:00
Temperature -9°C
Wind W 35 km/h
Altitude 2250 m
20 November 06:00
Snow depth 20 cm
Wind 15 km/h
Gusts 20 km/h
Temperature +4°C