CHAMONIX VALLEY AND MONT-BLANC AREA WEATHER FORECAST


Natsume Sôseki
On my brush tip
Suddenly frozen
A water drop
ISSUED AT 08:45 SUNDAY JANUARY 16 2022
VALID FROM : SUNDAY 16 -- FRIDAY JANUARY 21 2022

GENERAL SYNOPSIS
Established european high pressure field was weakening somewhat while drifting S, and is currently lying mostly in the 1025-1030 hpa part, NW Maghreb to W Black Sea, via English Channel and N Germany; and in addition allowing for a tiny polar air thalweg to infiltrate high up, this Sunday up to N France, then up to NW Balkans by Monday morning. • In other words : almost without effect regarding our Region's weather, except for the increase of altitude stream. • Anticyclonic reign might last until Wednesday 26th along N slopes of the Alpine Range.
TODAY - SUNDAY JANUARY 16
Fair - dropping temperature, though still mild on sunny slopes - strong wind high up
SKY CONDITION : clear. Period of sunshine close to 100%.
PRECIPITATION : none.
WIND - ground level : calm -> SW light -> very light - calm in the evening.
WIND - mid mountain : SW -> NNW moderate - occasionally light to moderate.
WIND - high mountain : SW moderate to strong -> NW strong.
TEMPERATURE : low -8°C - high +3°C - temperature inversion toward 1200 m early in the morning.
ISOTHERM 0°C : 2400 -> 1800 m.
ISOTHERM -10°C : 3900 -> 3300 m.
ROAD CONDITION  : very cold - untreated roadways are slippery (Sun. 08:30).more
OVERNIGHT
Crystal clear night - bitter cold in the valley - windy high up
SKY CONDITION : clear - iso 0°C dropping towards 1500 m.
PRECIPITATION : none.
WIND - aloft : NW -> N strong -> NNE moderate.
TEMPERATURE : low -9°C - temperature inversion toward 1300 m.
MONDAY JANUARY 17
Fairly sunny - bitter cold morning in the valley - mild in the afternoon on sunny slopes
SKY CONDITION : clear on the whole - cloud possibly crossing over toward swiss border. Period of sunshine close to 90%.
PRECIPITATION : none.
WIND - aloft : NNE moderate - occasionally light to moderate.
TEMPERATURE : low -9 °C - high +3°C - temperature inversion toward 1300 m early in the morning.
TUESDAY JANUARY 18
Low stratus cloud risk by dawn - else, sunny - light winds likely high up
SKY CONDITION : clear or patly cloudy. Period of sunshine close to 90%.
PRECIPITATION : none.
WIND - aloft : NE light to moderate -> E light.
TEMPERATURE : steady.
EXTENDED OUTLOOK UNTIL FRIDAY JANUARY 21 2022

Wednesday : low stratus cloud risk in the morning - else rather sunny - moderate flow high up, probably veering SW to NW. Thursday : uncertain - morning low stratus cloud risk, still, then cold front without precipitation likely to crossing over early in the afternoon - SW will increase high up ahead of it, and should be veering NW by it's crossing. Friday : very uncertain - probably still in the moderately unstable tail of previous light disturbance - cold snap and strong Bise wind likely high up.

Forecast reliability : fairly good until Tuesday.

ReportsAs a reminder, today in Chamonix, the sun rises at 08:09:07 and goes down at 17:15:43.
Chamonix - ville
45.55 N 6.51 E - Altitude 1020 m
January 16, 2022 08:00
Temperature -7.1°C
Relative humidity 94%
Wind 5 km/h
Sea level pressure 1029 hpa - rising slowly
Pressure at 1042 m 912 mb
Precipitation last 6h 0.0 mm
Skies clear
Visibility 120000 m
Altitude 3845 m
January 16, 2022 08:00
Temperature -12.5°C
Wind SW 15-65 km/h
Altitude 2250 m
January 16, 2022 08:00
Snow depth 30 cm
Wind WSW 20 km/h
Gusts 35 km/h
Temperature -1.2°C