CHAMONIX VALLEY AND MONT-BLANC AREA WEATHER FORECAST


Natsume Sôseki
Easterly wind Spring wind
If I knew you're awaiting me
Leaving I would definitely
ISSUED AT 20:15 ON SUNDAY MAY 24, 2015
VALID FROM : SUNDAY MAY 24 -- UNTIL : SATURDAY MAY 30 2015

GENERAL SYNOPSIS
High 1038 hpa north of Azores, extending a ridge 1020 hpa reaching Northern France, currently withdrawing west. Altitude low, almost stationary over Central Italy, filling completely. In the resulting low gradient pattern over the Alps, the altitude stream will be backing northwest, light, yet allowing a fairly unorganized disturbance to sliding along the eastern flank of the Atlantic high on Monday : light and scattered precipitation will be therefore crossing over the area until the middle of the following night. Altitude wind expected to increasing to strong for a short while thereafter. Improving as of Tuesday afternoon, further on Wednesday, and, maybe, until the end of the week.
SUNDAY EVENING MAY 24 - AND OVERNIGHT
Clearing skies - cool by dawn
SKY CONDITION : cloudy at first - becoming clear or partly cloudy.
PRECIPITATION : none.
WIND - ground level : variable light or nil.
WIND - mid mountain : N light.
WIND - high mountain : N -> NW light to moderate.
TEMPERATURE : low +6°C.
ISOTHERM 0°C : 2800 -> 2600 -> 2700 m.
ISOTHERM -10°C : 4800 -> 4600 m.
Slightly uncertain.
ROAD CONDITION  : @ 06:30, dry roadways on the whole.morelive precipitation radar over the Alps
TOMORROW - MONDAY MAY 25
Fairly sunny morning ‑ becoming cloudy with scattered shower
SKY CONDITION : partly cloudy in the morning - becoming cloudy, then mostly cloudy. period of sunshine close to 40%.
PRECIPITATION : outbreaks of light rain from the northwest towards the latter part of the afternoon - rain-snow limit towards 2400 m, dropping.
WIND - ground level : variable light - at times light to moderate early in the afternoon.
WIND - mid mountain : N -> NW light.
WIND - high mountain : NW light to moderate.
TEMPERATURE : low +6°C - high +17°C.
ISOTHERM 0°C : 2700 -> 2400 m.
ISOTHERM -10°C : 4600 -> 4400 m.
Slightly uncertain.
MONDAY TO TUESDAY NIGHT - MAY 25 TO 26
Mainly cloudy - scattered shower - strong wind high up
SKY CONDITION  : mostly cloudy - overcast at times.
PRECIPITATION : scattered showers, mainly in the first part of the night - rain-snow limit towards 2200 m, dropping.
WIND - aloft : NW light to moderate -> N strong.
TEMPERATURE : low +6°C.
Uncertain.
TUESDAY MAY 26
Cloudy, then improving sunny with a fairly strong N wind
SKY CONDITION : cloudy or mostly cloudy early in the morning - becoming cloudy with sunny spells spreading out. Period of sunshine close to 55%.
PRECIPITATION : probably none.
WIND - aloft : N strong -> moderate to strong.
TEMPERATURE : low +6 °C - high +16°C.
Uncertain.
WEDNESDAY MAY 27
Sunny - mild with some afternoon cumulus cloud over the massifs
SKY CONDITION : clear or partly cloudy in the morning - partly cloudy to cloudy in the afternoon due to cumulus cloud growth over the massifs. Period of sunshine close to 90%.
PRECIPITATION : none.
WIND - aloft : NNE moderate -> NNW light to moderate.
TEMPERATURE : low +5°C - high +18°C.
Uncertain.
EXTENDED OUTLOOK UNTIL SATURDAY MAY 30 2015

Thursday and Friday : fairly sunny and mild ‑ afternoon cumulus cloud growth over the massifs. Saturday : probably fairly sunny, yet with increasing diurnal instability and a thundery shower risk later in the afternoon.

Forecast reliability : poor.

ReportsAs a reminder, today in Chamonix, the sun rises at 05:47:55 and goes down at 21:11:41.
45.55 N 6.51 E - Altitude 1040 m
28 May 07:00
Temperature +4°C
Relative humidity 85%
Wind 0 km/h
Sea level pressure 1023 hpa - rising
Pressure at 1042 m 901 mb
Precipitation last 6h 0.0 mm
Skies clear
Visibility 75000 m
Altitude 3845 m
28 May 07:00
Temperature -8°C
Wind NE 40 km/h
Altitude 2250 m
28 May 06:00
Snow depth 0 cm
Wind 5 km/h
Gusts -- km/h
Temperature +3°C