CHAMONIX VALLEY AND MONT-BLANC AREA WEATHER FORECAST
ISSUED AT 07:55 SUNDAY SEPTEMBER 25
VALID FROM : SUNDAY SEPTEMBER 25 ‑‑ UNTIL : FRIDAY SEPTEMBER 30 2016
The snake flees—
But the eyes that peered at me
Remain in the weeds
Extended high 1022‑1025 hpa, Alps to Carpathian Ridge and further to Baltic Lands, refocusing over the Eastern Scandinavian on Monday. Low system whirling between Iceland, Norwegian Sea and Northern British Isles. • Fair weather today, becoming warm in the valley and very mild in the median altitude range. • Broken cloud patches coming in from the west towards the evening and of very high veiling cloud as well. • The high pressure shielding will indeed be temporarily knocked over by a weak thalweg linked to the above mentioned low system; then pressure will increase again as soon as Tuesday morning. • Fairly changeable weather to be expected therefore on Monday, with a very light shower risk, probably . Improving fairly sunny on Tuesday.
TODAY - SUNDAY SEPTEMBER 25
SKY CONDITION : clear or partly cloudy ‑ becoming cloudy from the west later in the evening. Period of sunshine close to 90%.
PRECIPITATION : none.
WIND - ground level : variable light ‑ mainly SW in the afternoon.
WIND - mid mountain : S ‑> WSW light.
WIND - high mountain : SSE light to moderate ‑> SSW light.
TEMPERATURE : low +7°C - high +22°C.
ISOTHERM 0°C : 3600 ‑> 3300 m.
ISOTHERM -10°C : 5200 ‑> 4900 m.
SKY CONDITION : cloudy ‑ high cloud veiling the sky ‑ broken cloud patches in the median altitude range.
PRECIPITATION : probably none.
WIND - aloft : SSW ‑> W light.
TEMPERATURE : low +8°C.
MONDAY SEPTEMBER 26
SKY CONDITION : cloudy with sunny spells ‑ mostly cloudy at times towards the latter part of the afternoon. Period of sunshine close to 55%.
PRECIPITATION : light shower risk towards the latter part of the afternoon ‑ rain‑snow limit towards 3000 m.
WIND - aloft : W ‑> SW light.
TEMPERATURE : low +8 °C - high +19°C.
TUESDAY SEPTEMBER 27
SKY CONDITION : early morning low cloud likely ‑ else, partly cloudy to cloudy ‑ cumulus cloud growth in the afternoon. Period of sunshine close to 60%.
PRECIPITATION : none.
WIND - aloft : N ‑> NNE light to moderate ‑ moderate at times.
TEMPERATURE : slightly dropping lows ‑ slightly rising highs.
EXTENDED OUTLOOK UNTIL FRIDAY SEPTEMBER 30 2016
Wednesday : fairly sunny ‑ cool in the morning ‑ mild in the afternoon ‑ fairly strong Bise wind high up in the morning. Thursday : fair weather likely, unseasonably mild, especially in the median altitude range. Friday : sunny ‑ slightly cooler high up, thus somewhat unstable ‑ increasing cloud in the afternoon.
Forecast reliability : fairly good until Monday ‑ poor thereafter.