CHAMONIX VALLEY AND MONT-BLANC AREA WEATHER FORECAST


Matsuo Bashō
First celebrate
The flowers in your heart
Confined in winter
ISSUED AT 19:05 ON MONDAY MARCH 02, 2015
VALID FROM : MONDAY MARCH 02 -- UNTIL : SUNDAY MARCH 08 2015

GENERAL SYNOPSIS
Extended low system, Iceland to Southern Scandinavia, driving a powerful westerly stream at the Alps latitude, unsettled and still fairly mild. Pressure rise from the southwest up to Northern Switzerland, reaching 1024 hpa by Tuesday morning : this night will be dotted with showers, getting gradually isolated — rain at first, snow later, and locally fairly heavy - then somehow improving on Tuesday, yet with a persistent strong westerly wind high up. Altitude flow then veering north, much colder and unsettled, due to a polar air mass sliding south along the eastern flank of the atlantic high which will have moved its center towards Biscaye in the mean time. Weather will therefore change to snow showers and sunny spells in turn on Wednesday, colder and dry with a strong NE wind on Thursday. Persistent high pattern likely to setting up thereafter.
MONDAY EVENING MARCH 02 - AND OVERNIGHT
Showers becoming isolated - gale easing off slightly high up
SKY CONDITION : mostly cloudy - fleeting clear spells towards the end of the night.
PRECIPITATIONradarlive precipitation over the Alps : showers in the first part of the night, becoming isolated - rain-snow limit towards 1000 m - expected snowfall towards 1500 m : ± 5 cm.
WIND - ground level : variable light to moderate.
WIND - mid mountain : WNW moderate -> light to moderate.
WIND - high mountain : NW severe gale -> WNW strong to gale force.
TEMPERATURE : low -1°C.
ISOTHERM 0°C : 1500 -> 1200 m.
ISOTHERM -10°C : 2800 m.
Uncertain.
ROAD CONDITION  : @ 08:00, locally humid roadways - Montet pass closed.morelive precipitation radar over the Alps
TOMORROW - TUESDAY MARCH 03
Fleeting sunny spells in the morning ‑ evening shower risk - strong wind high up
SKY CONDITION : cloudy with fleeting sunny spells in the morning - becoming mostly cloudy. period of sunshine close to 35%.
PRECIPITATION : isolated showers likely towards the evening - uncertain rain-snow limit towards 1000 m.
WIND - ground level : variable light to moderate.
WIND - mid mountain : WNW -> W light to moderate.
WIND - high mountain : WNW strong to gale force -> W strong.
TEMPERATURE : low -1°C - high +5°C.
ISOTHERM 0°C : 1200 -> 1500 m.
ISOTHERM -10°C : 2800 -> 3300 m.
Uncertain.
TUESDAY TO WEDNESDAY NIGHT - MARCH 03 TO 04
Unsettled air coming in from the north
SKY CONDITION  : mostly cloudy to overcast.
PRECIPITATION : light and scattered showers - becoming frequent towards the end of the night - rain-snow limit towards 1000 m - expected snowfall towards 1500 m : 10-15 cm.
WIND - aloft : W strong -> moderate to strong.
TEMPERATURE : low -1°C.
Very uncertain.
WEDNESDAY MARCH 04
Unsettled ‑ sunny spells and snow showers - decreasing wind high up
SKY CONDITION : mostly cloudy - at times cloudy with sunny spells. Period of sunshine close to 30%.
PRECIPITATION : showers, mostly in the afternoon and locally fairly heavy - rain-snow limit dropping towards 500 m.
WIND - aloft : W moderate to strong -> N light to moderate.
TEMPERATURE : low -1 °C - high +2°C.
Very uncertain.
THURSDAY MARCH 05
Getting colder ‑ scarce snow showers ‑ NE gale high up in the afternoon
SKY CONDITION : cloudy with sunny spells - at times mostly cloudy. Period of sunshine close to 40%.
PRECIPITATION : isolated showers likely.
WIND - aloft : NNE severe gale.
TEMPERATURE : low -4°C - high +1°C.
Very uncertain.
EXTENDED OUTLOOK UNTIL SUNDAY MARCH 08 2015

Friday : fairly sunny, although cold ‑ windy high up from the north. Saturday and Sunday : fairly sunny ‑ getting noticeably milder ‑ windy high up from the northeast.

Forecast reliability : poor.

ReportsAs a reminder, today in Chamonix, the sun rises at 07:07:10 and goes down at 18:21:38.
45.55 N 6.51 E - Altitude 1040 m
2 March 08:00
Temperature +2°C
Relative humidity 100%
Wind 0 km/h
Sea level pressure 1015 hpa - falling
Pressure at 1042 m 892 mb
Precipitation last 6h 10.5 mm
Skies overcast - rain
Visibility 3500 m
Altitude 3845 m
2 March 07:00
Temperature -10°C
Wind WNW 110 km/h
Altitude 2250 m
2 March 06:00
Snow depth 50 cm
Wind 30 km/h
Gusts 40 km/h
Temperature -2°C