CHAMONIX VALLEY AND MONT-BLANC AREA WEATHER FORECAST


Matsuo Bashō
On a mountain path
Something might charm you
A wild violet
ISSUED AT 08:30 TUESDAY SEPTEMBER 2
VALID FROM : TUESDAY SEPTEMBER 2 ‑‑ UNTIL : SUNDAY SEPTEMBER 7 2014

GENERAL SYNOPSIS
High 1023 hpa, British Isles, drifting northeast while strengthening slightly. Low 1003 hpa, Southern Adriatic Sea, drifting towards the Balkans. Resulting dry northerly to northeasterly stream in‑between, fairly strong, decreasing. Sunny weather currently ruling in a cool and windy atmosphere is expected to becoming summer, with some diurnal instability resuming form Thursday.
TODAY - TUESDAY SEPTEMBER 2
Fine sunny weather ‑ still cool ‑ slightly decreasing N wind high up
SKY CONDITION : clear or partly cloudy. Period of sunshine close to 100%.
PRECIPITATION : none.
WIND - ground level : variable light in the morning ‑ moderate thermal breeze in the afternoon.
WIND - mid mountain : NNE light to moderate.
WIND - high mountain : NNE ‑> N moderate to strong ‑ moderate at times.
TEMPERATURE : low +5°C - high +20°C - temperature inversion toward 1500 m early in the morning.
ISOTHERM 0°C : 3400 ‑> 3700 m.
ISOTHERM -10°C : 5300 ‑> 5600 m.
OVERNIGHT
Clear and cool ‑ still fairly windy high up
SKY CONDITION : clear.
PRECIPITATION : none.
WIND - aloft : NNE moderate to strong.
TEMPERATURE : low +6°C - temperature inversion toward 1500 m.
WEDNESDAY SEPTEMBER 3
Fine sunny weather ‑ cool in the morning ‑ becoming warm in the afternoon
SKY CONDITION : clear or partly cloudy ‑ afternoon cumulus cloud over the massifs. Period of sunshine close to 90%.
PRECIPITATION : none.
WIND - aloft : NNE moderate to strong ‑> ENE light.
TEMPERATURE : low +6 °C - high +22°C - temperature inversion toward 1500 m early in the morning.
THURSDAY SEPTEMBER 4
Fine sunny weather ‑ warm in the afternoon
SKY CONDITION : clear or partly cloudy ‑ afternoon cumulus cloud over the massifs. Period of sunshine close to 85%.
PRECIPITATION : late afternoon shower slight risk, locally over the massifs.
WIND - aloft : N ‑> WNW light.
TEMPERATURE : slightly rising highs.
EXTENDED OUTLOOK UNTIL SUNDAY SEPTEMBER 7 2014

Friday to Sunday : some diurnal instability ‑ sunny ‑ warm in the afternoon with increasing cloud and evening shower likely over the massifs.

Forecast reliability : fairly good until Friday ‑ poor thereafter.

ReportsAs a reminder, today in Chamonix, the sun rises at 06:55:02 and goes down at 20:09:08.
45.55 N 6.51 E - Altitude 1040 m
1 September 08:00
Temperature +8°C
Relative humidity 100%
Wind 0 km/h
Sea level pressure 1019 hpa - steady
Pressure at 1042 m 900 mb
Precipitation last 6h 0.8 mm
Skies cloudy - low cloud - clear above 1100 m
Visibility 60000 m
Altitude 3845 m
1 September 08:00
Temperature -10°C
Wind NE 60 km/h
Altitude 2250 m
1 September 08:00
Snow depth 0 cm
Wind 15 km/h
Gusts 30 km/h
Temperature 0°C