CHAMONIX VALLEY AND MONT-BLANC AREA WEATHER FORECAST


Matsuo Bashō
In summer rain
The leg of the crane
Becomes shorter
ISSUED AT 07:55 MONDAY AUGUST 3
VALID FROM : MONDAY AUGUST 3 ‑‑ UNTIL : SATURDAY AUGUST 8 2015

GENERAL SYNOPSIS
High 1025‑1020 hpa, Western Russia to Austria, weakening from the west as an Atlantic low approaches, getting close west to Scotland while deepening towards 980 hpa by Tuesday morning. Fine summer weather will be made good today while high temperature will continue to rise well above seasonal average. The southern part of the Scottish low’s linked disturbance should drive thundery shower or thunderstorm against the Western Alps towards Tuesday noon. It will move away eastward while disintegrating later in the afternoon because of a slight pressure rise over the Alps going along with a warm african air income from the southwest high up. Resuming summer hot condition from Wednesday until Friday, ahead of a thundery deterioration on Saturday.
TODAY - MONDAY AUGUST 3
Fine summer condition ‑ getting even hotter in the afternoon
SKY CONDITION : clear. Period of sunshine close to 100%.
PRECIPITATION : none.
WIND - ground level : variable light in the morning ‑ afternoon thermal breeze, moderate at times.
WIND - mid mountain : WNW ‑> SW faible.
WIND - high mountain : WNW ‑> W light to moderate.
TEMPERATURE : low +12°C - high +29°C.
ISOTHERM 0°C : 4700 ‑> 4600 m.
ISOTHERM -10°C : 6100 ‑> 6000 m.
ROAD CONDITION  : @ 10:00, dry roadways.morelive precipitation radar over the Alps
OVERNIGHT
Clear skies at first ‑ becoming hazy later ‑ windy high up
SKY CONDITION : clear until the latter part of the night ‑ fairly thick high cloud coming in from the west shortly before dawn.
PRECIPITATION : none.
WIND - aloft : W light to moderate ‑> SW moderate to strong.
TEMPERATURE : low +13°C.
TUESDAY AUGUST 4
Unsettled ‑ thundery disturbance crossing over ‑ improving later
SKY CONDITION : cloudy early in the morning ‑ thickening high cloud ‑ fat cumulus cloud growth ‑ clear spells spreading out in the evening. Period of sunshine close to 45%.
PRECIPITATION : thundery showers or thunderstorms passing towards the middle of the day ‑ rain‑snow limit towards 4000 m.
WIND - aloft : SW moderate to strong ‑> W moderate.
TEMPERATURE : low +13 °C - high +22°C.
WEDNESDAY AUGUST 5
Fine summer weather ‑ mild in the morning ‑ hot in the afternoon
SKY CONDITION : clear or partly cloudy ‑ some cumulus cloud over the massifs in the afternoon. Period of sunshine close to 95%.
PRECIPITATION : none.
WIND - aloft : W moderate ‑> WSW light to moderate.
TEMPERATURE : noticeably rising highs.
EXTENDED OUTLOOK UNTIL SATURDAY AUGUST 8 2015

Thursday : fine summer weather ‑ hot in the afternoon with cumulus cloud growth over the massifs ‑ late afternoon thundery shower slight risk. Friday : sunny ‑ becoming sultry ‑ evening thunderstorm likely. Satueday : thundery deterioration to be confirmed.

Forecast reliability : fairly good until Tuesday ‑ poor thereafter.

ReportsAs a reminder, today in Chamonix, the sun rises at 06:17:44 and goes down at 20:59:40.
45.55 N 6.51 E - Altitude 1040 m
3 August 07:00
Temperature +12°C
Relative humidity 90%
Wind 0 km/h
Sea level pressure 1022 hpa - steady
Pressure at 1042 m 902 mb
Precipitation last 6h 0.0 mm
Skies partly cloudy
Visibility 60000 m
Altitude 3845 m
3 August 07:00
Temperature +2°C
Wind NW 15 km/h
Altitude 2250 m
3 August 06:00
Snow depth 0 cm
Wind 15 km/h
Gusts 20 km/h
Temperature +11°C