CHAMONIX VALLEY AND MONT-BLANC AREA WEATHER FORECAST


Matsuo Bashō
The pine wind
Circling around the eaves—
Autumn deepens
ISSUED AT 07:50 SATURDAY NOVEMBER 1
VALID FROM : SATURDAY NOVEMBER 1 ‑‑ UNTIL : THURSDAY NOVEMBER 6 2014

GENERAL SYNOPSIS
High, 1026 hpa over Hungary, drifting slowly east. Sunny condition probably persisting until Monday morning with temperature above seasonal average. Altitude stream, light at first, is expected to backing southwest overnight while a deep and extended low is coming in south of Iceland. It should increase on Sunday and even more on Monday, then back further south on Tuesday, triggering a strong fœhn wind spell over the northern slopes of the Alps. Upcoming disturbance expected to be delayed until Tuesday evening or Wednesday morning. Which outlook is still uncertain by now.
TODAY - SATURDAY NOVEMBER 1
Sunny ‑ cool in the morning ‑ very mild on sunny slopes later
SKY CONDITION : clear or partly cloudy ‑ thin high cloud crossing over from the north in the morning. Period of sunshine close to 95%.
PRECIPITATION : none.
WIND - ground level : variable light.
WIND - mid mountain : S ‑> W light.
WIND - high mountain : NE ‑> W light.
TEMPERATURE : low 0°C - high +18°C - temperature inversion toward 1600 m early in the morning.
ISOTHERM 0°C : 3300 m.
ISOTHERM -10°C : 5200 ‑> 5100 m.
OVERNIGHT
Partly cloudy ‑ cold by dawn
SKY CONDITION : partly cloudy ‑ thin high cloud crossing over from the south.
PRECIPITATION : none.
WIND - aloft : W light ‑> SW light to moderate.
TEMPERATURE : low +1°C - temperature inversion toward 1500 m.
SUNDAY NOVEMBER 2
Fairly sunny ‑ high cloud running over from the south ‑ mild in the afternoon
SKY CONDITION : clear or partly cloudy ‑ high cloud patches running over from the south at times. Period of sunshine close to 80%.
PRECIPITATION : none.
WIND - aloft : SW light to moderate ‑> moderate ‑ fœhn wind expected to getting up in the evening.
TEMPERATURE : low 0 °C - high +18°C - temperature inversion toward 1500 m early in the morning.
MONDAY NOVEMBER 3
Fairly sunny at first ‑ becoming cloudy ‑ fœhn wind increasing to strong ‑ mild
SKY CONDITION : partly cloudy in the morning ‑ becoming cloudy ‑ thickening high cloud running over from the south. Period of sunshine close to 65%.
PRECIPITATION : none.
WIND - aloft : SW moderate to strong ‑ fœhn wind increasing to strong in the afternoon.
TEMPERATURE : rising lows.
EXTENDED OUTLOOK UNTIL THURSDAY NOVEMBER 6 2014

Tuesday : cloudy with fœhn wind, probably strong ‑ rain probably running over from the south towards the evening. Wednesday : very uncertain ‑ heavy precipitation likely over the Aosta Valley ‑ although lighter north of the massif. Thursday : improving cool, temporarily.

Forecast reliability : fairly good until Sunday ‑ poor thereafter.

ReportsAs a reminder, today in Chamonix, the sun rises at 07:13:26 and goes down at 17:18:46.
45.55 N 6.51 E - Altitude 1040 m
1 November 07:00
Temperature 0°C
Relative humidity 100%
Wind 0 km/h
Sea level pressure 1026 hpa - rising slowly
Pressure at 1042 m 905 mb
Precipitation last 6h 0.0 mm
Skies partly cloudy
Visibility 65000 m
Altitude 3845 m
31 October 08:00
Temperature -6°C
Wind -- km/h
Altitude 2250 m
1 November 06:00
Snow depth 0 cm
Wind 5 km/h
Gusts -- km/h
Temperature +7°C