CHAMONIX VALLEY AND MONT-BLANC AREA WEATHER FORECAST


Matsuo Bashō
Heat shimmer
Rising from the shoulder
My paper robe
ISSUED AT 07:35 SATURDAY AUGUST 27
VALID FROM : SATURDAY AUGUST 27 ‑‑ UNTIL : THURSDAY SEPTEMBER 1 2016

GENERAL SYNOPSIS
High 1025 hpa, almost stationary Belarus and Northern Ukraine, weakening slowly, yet still sheltering the Alpine Range from noticeable disturbances. Thermal low over Spain, extending north, then finally merging over the British Isles by Sunday night with an atlantic low which is currently approaching southwest of Ireland. This phenomenon will be the main shape giving to the little weather change which is expected to occurring by Monday. • Mainly sunny and hot, today, in a sultry atmosphere. Diurnal evolution will make cumulus cloud growing over the massifs and even cause isolated thundery outbreaks later in the afternoon.
TODAY - SATURDAY AUGUST 27
Sunny ‑ becoming very sultry ‑ late afternoon thundery shower risk
SKY CONDITION : clear or partly cloudy ‑ becoming locally cloudy towards the latter part of the afternoon ‑ cumulus cloud growing over the bordering massifs. Period of sunshine close to 80%.
PRECIPITATION : late afternoon isolated thunderstorm risk ‑ rain‑snow limit towards 3900 m.
WIND - ground level : variable light ‑ at times thermal SW light to moderate.
WIND - mid mountain : SE light to moderate ‑> variable light.
WIND - high mountain : S light ‑ SW light to moderate.
TEMPERATURE : low +12°C - high +29°C - temperature inversion toward 1200 m early in the morning.
ISOTHERM 0°C : 4400 ‑> 4300 m.
ISOTHERM -10°C : 5800 m.
OVERNIGHT
Clear and mild, especially in the median altitude range
SKY CONDITION : clear or partly cloudy after evening cumulus cloud dispelling.
PRECIPITATION : none.
WIND - aloft : SW ‑> W light to moderate.
TEMPERATURE : low +12°C - temperature inversion toward 1400 m.
SUNDAY AUGUST 28
Sunny ‑ sultry ‑ late afternoon thundery shower slight risk
SKY CONDITION : clear in the morning ‑ becoming partly cloudy or locally cloudy towards the latter part of the afternoon ‑ some cumulus cloud growing over the massifs. Period of sunshine close to 80%.
PRECIPITATION : late afternoon thundery shower slight risk ‑ rain‑snow limit towards 3900 m.
WIND - aloft : W light to moderate ‑ SW moderate at times.
TEMPERATURE : low +11 °C - high +28°C - temperature inversion toward 1200 m early in the morning.
MONDAY AUGUST 29
Partly cloudy ‑ cooler ‑ thundery shower risk
SKY CONDITION : partly cloudy on the whole ‑ probably cloudy with sunny spells in the afternoon. Period of sunshine close to 60%.
PRECIPITATION : thundery showers crossing over during the afternoon ‑ rain‑snow limit towards 3500 m.
WIND - aloft : W ‑> WSW moderate.
TEMPERATURE : dropping highs.
EXTENDED OUTLOOK UNTIL THURSDAY SEPTEMBER 1 2016

Tuesday to Thursday : fairly sunny ‑ dry ‑ somewhat warmer than seasonal average. Uncertain outlook.

Forecast reliability : fairly good until Sunday ‑ poor thereafter.

ReportsAs a reminder, today in Chamonix, the sun rises at 06:48:14 and goes down at 20:19:20.
45.55 N 6.51 E - Altitude 1040 m
27 August 07:00
Temperature +12°C
Relative humidity 85%
Wind 0 km/h
Sea level pressure 1022 hpa - steady
Pressure at 1042 m 905 mb
Precipitation last 6h 0.0 mm
Skies clear
Visibility 100000 m
Altitude 3845 m
27 August 07:00
Temperature +2°C
Wind S 5 km/h
Altitude 2250 m
27 August 06:00
Snow depth 0 cm
Wind 5 km/h
Gusts -- km/h
Temperature +14°C