CHAMONIX VALLEY AND MONT-BLANC AREA WEATHER FORECAST
ISSUED AT 08:35 THURSDAY JULY 24
VALID FROM : THURSDAY JULY 24 ‑‑ UNTIL : TUESDAY JULY 29 2014
On a mountain path
Something might charm you
A wild violet
Low gradient field with medium pressure setting up over France and the Mediterranean, and ruling for a while, favorable to typical summer condition with diurnal instability : light altitude stream, sunny morning followed by cloudy afternoon with possible thundery shower later, which eventualtity is to be evaluated on a day to day basis. Altitude low over Southern Germany in the morning, driving back thick cloud with showers from the northwest. It is expected to drifting northeast within Friday morning, allowing for a relative sunny improvement.
TODAY - THURSDAY JULY 24
Currently testing : rainfall radar live.
SKY CONDITION : mostly cloudy early in the morning and towards the latter part of the afternoon ‑ cloudy with sunny spells at times towards the middle of the day. Period of sunshine close to 40%.
PRECIPITATION : early morning showers ending soon ‑ then probably resuming in the afternoon, although scattered with possible local thunderstorm ‑ rain‑snow limit towards 3400 m.
WIND - ground level : variable light ‑ possible gust if thundery shower.
WIND - mid mountain : mainly W ‑ light.
WIND - high mountain : mainly W ‑ light to moderate.
TEMPERATURE : low +13°C - high +22°C.
ISOTHERM 0°C : 3600 ‑> 3700 ‑> 3600 m.
ISOTHERM -10°C : 5400 m.
SKY CONDITION : cloudy or locally mostly cloudy at first ‑ becoming clear or partly cloudy.
PRECIPITATION : none.
WIND - aloft : W light to moderate ‑> moderate.
TEMPERATURE : low +9°C.
FRIDAY JULY 25
SKY CONDITION : clear or partly cloudy ‑ afternoon cumulus cloud growing over the massifs. Period of sunshine close to 75%.
PRECIPITATION : late afternoon shower risk ‑ rain‑snow limit towards 3400 m.
WIND - aloft : W moderate ‑> WSW light to moderate.
TEMPERATURE : low +8 °C - high +24°C - temperature inversion toward Incertain m early in the morning.
SATURDAY JULY 26
SKY CONDITION : cloudy with sunny spells ‑ more frequent and brighter in the morning. Period of sunshine close to 60%.
PRECIPITATION : thunderstorm, more likely in the afternoon ‑ rain‑snow limit towards 3300 m.
WIND - aloft : NW light to moderate ‑> moderate.
TEMPERATURE : dropping slightly.
EXTENDED OUTLOOK UNTIL TUESDAY JULY 29 2014
Sunday : more stable summer condition ‑ fairly sunny ‑ cumulus cloud over the massifs in the afternoon. Monday and Tuesday : altitude cold drop probably crossing over in the vicinity of the Alps, causing unsettled condition with some sunny spells and frequent showers or possible thunderstorm, locally.
Forecast reliability : poor.