CHAMONIX VALLEY AND MONT-BLANC AREA WEATHER FORECAST
ISSUED AT 08:40 SUNDAY APRIL 20
VALID FROM : SUNDAY APRIL 20 ‑‑ UNTIL : FRIDAY APRIL 25 2014
He doesn't know—
The cat on the stove
Extended low system with weak gradient pressure field, Madeira to the Mediterranean and further to Germany, linked to an altitude cold drop, Central to Northwestern France. Temporary improvement until the first part of the afternoon, then rainy deterioration from the southwest towards the evening and during the following night. Current weather pattern is expected to persisting during the main part of the week causing very unsettled condition, favorable to showers, mainly in the afternoon..
TODAY - SUNDAY APRIL 20
SKY CONDITION : early morning fog down in the valley, vanishing quickly ‑ otherwise partly cloudy in the morning ‑ becoming mostly cloudy from the southwest during the afternoon. Period of sunshine close to 50%.
PRECIPITATION : running over from the south towards the latter part of the afternoon ‑ rain‑snow limit towards 2000 m, dropping.
WIND - ground level : variable light ‑ possible fœhn wind puffs towards the middle of the day.
WIND - mid mountain : mainly SE ‑ light.
WIND - high mountain : WSW ‑> SW light to moderate.
TEMPERATURE : low +1°C - high +14°C.
ISOTHERM 0°C : 2200 ‑> 2500 ‑> 2200 m.
ISOTHERM -10°C : 3700 ‑> 4100 ‑> 3900 m.
SKY CONDITION : overcast, then mostly cloudy.
PRECIPITATION : light and scattered until the end of the night ‑ rain‑snow limit towards 1900 m.
WIND - aloft : SW light to moderate ‑> SSW light.
TEMPERATURE : low +3°C.
MONDAY APRIL 21
SKY CONDITION : mostly cloudy early in the morning ‑ becoming cloudy with sunny spells ‑ increasing fat cloud during the afternoon. Period of sunshine close to 20%.
PRECIPITATION : light and scattered early in the morning ‑ dry towards the middle of the day ‑ showers probably resuming in the afternoon, locally moderate ‑ rain‑snow limit towards 2000‑2200 m.
WIND - aloft : SSW light ‑> SW light to moderate.
TEMPERATURE : low +3 °C - high +14°C.
TUESDAY APRIL 22
SKY CONDITION : partly cloudy in the morning ‑ becoming cloudy, then mostly cloudy in the afternoon. Period of sunshine close to 45%.
PRECIPITATION : afternoon shower.
WIND - aloft : W ‑> S light.
TEMPERATURE : slightly dropping lows ‑ slightly rising highs.
EXTENDED OUTLOOK UNTIL FRIDAY APRIL 25 2014
Wednesday : very uncertain ‑ fairly sunny in the morning ‑ cloudy with shower risk in the afternoon. Thursday : very uncertain ‑ fairly sunny in the morning ‑ afternoon shower slight risk. Friday : very uncertain ‑ active disturbance possibly crossing over.
Forecast reliability : poor.
Avalanche risk becoming considerable (3/5) above 2500 m.