CHAMONIX VALLEY AND MONT-BLANC AREA WEATHER FORECAST


Natsume Sôseki
On my brush tip
Suddenly frozen
A water drop
ISSUED AT 07:45 THURSDAY DECEMBER 5
VALID FROM : THURSDAY DECEMBER 5 ‑‑ UNTIL : TUESDAY DECEMBER 10 2019

GENERAL SYNOPSIS
High 1032 hpa, Northern Carpathian Mountains, drifting towards Black Sea. High 1030 hpa, Azores, heightened by mild air altitude high ridge. Isobaric neck 1022‑1020 hpa in‑between, over France and the Alps. • Light southeast flow under far‑off influence of filling low system southwest close to Balearic Islands, which continues to drive some Mediterranean humidity towards our Region this Thursday morning, mostly as thin high cloud veils. • Fair weather is expected to persist until Friday, rid of morning stratus cloud in the upper valleys. • Then, seasonal unsettled westerly rule will resume as of Monday. Snowfall expected above 1000 m on Monday.
TODAY - THURSDAY DECEMBER 5
Fair weather ‑ cold in the valley at first ‑ mild on sunny slopes later
SKY CONDITION : clear or partly cloudy ‑ still some high altitude veils early in the morning. Period of sunshine close to 95%.
PRECIPITATION : none.
WIND - ground level : NE light ‑ slightly foehny morning in the upper valley ‑ calm in the afternoon.
WIND - mid mountain : variable light ‑> calm.
WIND - high mountain : SE light to moderate ‑> ESE light.
TEMPERATURE : low ‑4°C - high +7°C - temperature inversion toward 1200 m early in the morning.
ISOTHERM 0°C : 3000 ‑> 2800 m.
ISOTHERM -10°C : 4500 ‑> 4300 m.
OVERNIGHT
Fair weather ‑ calm and rather mild in the median altitude range
SKY CONDITION : clear.
PRECIPITATION : none.
WIND - aloft : ESE ‑> NNE ‑> N light.
TEMPERATURE : low ‑4°C - temperature inversion toward 1600 m.
FRIDAY DECEMBER 6
Fair weather ‑ cold in the valley at first ‑ mild on sunny slopes later
SKY CONDITION : clear until the latter part of the afternoon ‑ thin high cloud from northwest in the evening. Period of sunshine close to 100%.
PRECIPITATION : none.
WIND - aloft : N light ‑> W moderate.
TEMPERATURE : low ‑5 °C - high +6°C - temperature inversion toward 1300 m early in the morning.
SATURDAY DECEMBER 7
Frequent cloud crossings, without precipitation ‑ windy high up
SKY CONDITION : mostly cloudy ‑ frequent patches crossing over ‑ becoming cloudy with sunny spells in the afternoon. Period of sunshine close to 45%.
PRECIPITATION : none.
WIND - aloft : NW moderate to strong ‑ occasionally moderate.
TEMPERATURE : slightly dropping lows.
EXTENDED OUTLOOK UNTIL TUESDAY DECEMBER 10 2019

Sunday : cloud crossings ‑ mostly northwest high up, fairly strong ‑ afternoon shower ‑ quite milder than seasonal average. Monday : very unsettled ‑ continuous precipitation ‑ rain‑snow limit towards 1100‑1000 m ‑ northwest storm high up. Tuesday : mainly cloudy ‑ snow shower (800 m) slight risk ‑ northwest stream remains strong high up.

Forecast reliability : fairly good until Saturday.

ReportsAs a reminder, today in Chamonix, the sun rises at 07:58:13 and goes down at 16:48:09.
45.55 N 6.51 E - Altitude 1040 m
December 5 07:00
Temperature -4°C
Relative humidity 95%
Wind NE 7 km/h
Sea level pressure 1019 hpa - steady
Pressure at 1042 m 901 mb
Precipitation last 6h 0.0 mm
Skies clear
Visibility 120000 m
Altitude 3845 m
December 5 07:00
Temperature -9°C
Wind S 10 km/h
Altitude 2250 m
December 5 06:00
Snow depth 62 cm
Wind 0 km/h
Gusts -- km/h
Temperature +2°C