CHAMONIX VALLEY AND MONT-BLANC AREA WEATHER FORECAST


Matsuo Bashō
Heat shimmer
Rising from the shoulder
My paper robe
ISSUED AT 08:10 TUESDAY AUGUST 30
VALID FROM : TUESDAY AUGUST 30 ‑‑ UNTIL : SUNDAY SEPTEMBER 4 2016

GENERAL SYNOPSIS
High 1025 hpa over the English Channel and Northwestern France, extending east. • Residue of a disturbance linked to a Southern Finland low, currently waving along the eastern part of the Alpine Barrier is reactivated by a minimum located south of Provence. • This is causing thundery precipitation over Northwestern Italy, locally heavy, and driving unsettled influences from the southeast up to the northern slopes of the high massifs, likely to triggering thundery showers during the afternoon. • Same scenario possibly unfolding on Wednesday, then the risk should be disappearing on Thursday, allowing for fair late summer condition to ruling north of the Alps, probably until Saturday.
TODAY - TUESDAY AUGUST 30
Partly sunny ‑ warm afternoon with thundery shower risk
SKY CONDITION : partly cloudy to cloudy in the morning ‑ increasing cloud running over the bordering massifs in the afternoon. Period of sunshine close to 60%.
PRECIPITATION : afternoon thundery shower risk, running over from the south ‑ rain‑snow limit towards 3800 m.
WIND - ground level : NE ‑> variable light.
WIND - mid mountain : SE ‑> ESE light.
WIND - high mountain : E light.
TEMPERATURE : low +13°C - high +23°C.
ISOTHERM 0°C : 3900 ‑> 4000 m.
ISOTHERM -10°C : 5500 ‑> 5600 m.
OVERNIGHT
Cloudy at times ‑ mild
SKY CONDITION : broken cloud crossing over from the west.
PRECIPITATION : slight shower risk at first ‑ then, dry.
WIND - aloft : E ‑> ENE light.
TEMPERATURE : low +13°C.
WEDNESDAY AUGUST 31
Fairly sunny ‑ hot afternoon ‑ slight thundery shower risk
SKY CONDITION : partly cloudy in the morning ‑ large cumulus cloud running over from the east in the afternoon. Period of sunshine close to 65%.
PRECIPITATION : late afternoon thundery shower slight risk ‑ rain‑snow limit towards 3800 m.
WIND - aloft : ENE ‑> NW light.
TEMPERATURE : low +10 °C - high +25°C.
THURSDAY SEPTEMBER 1
Fairly sunny ‑ hot in the afternoon
SKY CONDITION : partly cloudy ‑ locally cloudy in the afternoon due to cumulus cloud growth. Period of sunshine close to 75%.
PRECIPITATION : none.
WIND - aloft : NW light to moderate ‑ light at times.
TEMPERATURE : slightly dropping lows ‑ slightly rising highs.
EXTENDED OUTLOOK UNTIL SUNDAY SEPTEMBER 4 2016

Friday and Saturday : fair sunny weather likely ‑ hot in the afternoon. Sunday : changeable ‑ cloudy with sunny spells ‑ shower risk ‑ fairly strong westerly high up.

Forecast reliability : poor.

ReportsAs a reminder, today in Chamonix, the sun rises at 06:51:58 and goes down at 20:13:48.
45.55 N 6.51 E - Altitude 1040 m
30 August 07:00
Temperature +13°C
Relative humidity 82%
Wind 0 km/h
Sea level pressure 1021 hpa - rising slowly
Pressure at 1042 m 904 mb
Precipitation last 6h 0.0 mm
Skies cloudy
Visibility 60000 m
Altitude 3845 m
30 August 07:00
Temperature -3°C
Wind W 5 km/h
Altitude 2250 m
30 August 06:00
Snow depth 0 cm
Wind 5 km/h
Gusts 10 km/h
Temperature +8°C