CHAMONIX VALLEY AND MONT-BLANC AREA WEATHER FORECAST


Tomiyasu Fūsei
There's nothing
He doesn't know—
The cat on the stove
ISSUED AT 19:15 ON FRIDAY APRIL 18, 2014
VALID FROM : FRIDAY APRIL 18 -- UNTIL : THURSDAY APRIL 24 2014

GENERAL SYNOPSIS
Altitude cold low, Germany, drifting over France within Saturday morning. By the same time, deepening low 1002 hpa, Genoa Gulf, then moving towards the Balearic Islands during the following night. Very unsettled, favorable to showers, mainly in the afternoon. Very cool until Saturday while getting slightly milder thereafter. Low pressure with low gradient pattern without any noticeable improvement expected to persisting at least until the middle of next week. Outlook is uncertain.
FRIDAY EVENING APRIL 18 - AND OVERNIGHT
Scattered showers at first - cloudy - almost cold - shifty wind high up
SKY CONDITION : mostly cloudy in the first part of the night - becoming cloudy with fleeting clear spells.
PRECIPITATION : scattered showers at least until the middle of the night - rain-snow limit towards 1200 m - dry later.
WIND - ground level : variable light.
WIND - mid mountain : NW light to moderate -> variable light.
WIND - high mountain : NNW strong -> variable light to moderate.
TEMPERATURE : low 0°C.
ISOTHERM 0°C : 1500 -> 1200 m.
ISOTHERM -10°C : 3500 -> 3000 m.
Uncertain.
TOMORROW - SATURDAY APRIL 19
Possible sunny spell - showers - very cool - shifty wind high up
SKY CONDITION : at times cloudy with fleeting sunny spells in the morning - otherwise mostly cloudy to overcast. period of sunshine close to 15%.
PRECIPITATION : showers - probably more frequent in the afternoon - rain-snow limit towards 1200 m, rising up towards 1500 m.
WIND - ground level : variable light.
WIND - mid mountain : variable light.
WIND - high mountain : variable light to moderate -> SE moderate to strong -> variable light to moderate.
TEMPERATURE : low 0°C - high +10°C.
ISOTHERM 0°C : 1200 -> 1900 m.
ISOTHERM -10°C : 3000 -> 3500 m.
Uncertain.
SATURDAY TO SUNDAY NIGHT - APRIL 19 TO 20
Isolated showers at first - becoming partly cloudy - cold by dawn
SKY CONDITION  : mostly cloudy early in the night - becoming partly cloudy.
PRECIPITATION : isolated showers in the evening and early in the night - dry later.
WIND - aloft : variable light to moderate -> W moderate to strong -> WSW moderate.
TEMPERATURE : low 0°C.
Uncertain.
SUNDAY APRIL 20
Slightly milder ‑ sunny spells in the morning - afternoon showers likely
SKY CONDITION : cloudy with sunny spells in the morning - becoming mostly cloudy in the afternoon. Period of sunshine close to 35%.
PRECIPITATION : showers likely to running over from the south in the afternoon - rain-snow limit towards 1900 m, dropping.
WIND - aloft : WSW moderate -> SW light to moderate.
TEMPERATURE : low 0 °C - high +16°C.
Very uncertain.
MONDAY APRIL 21
Often mainly cloudy - sunny spells towards noon ‑ showers
SKY CONDITION : mostly cloudy early in the morning - becoming cloudy with sunny spells - increasing cloud during the afternoon. Period of sunshine close to 35%.
PRECIPITATION : light and scattered early in the morning - dry towards the middle of the day - showers probably resuming in the afternoon.
WIND - aloft : SW light to moderate - moderate at times.
TEMPERATURE : low +4°C - high +14°C.
Very uncertain.
EXTENDED OUTLOOK UNTIL THURSDAY APRIL 24 2014

Tuesday : very uncertain ‑ cloudy with sunny spells in the morning ‑ showers likely in the afternoon. Wednesday : very uncertain ‑ fairly sunny in the morning ‑ cloudy with shower risk in the afternoon. Thursday : very uncertain - frequent shower in the afternoon.

Forecast reliability : poor.

ReportsAs a reminder, today in Chamonix, the sun rises at 06:38:27 and goes down at 20:24:40.
45.55 N 6.51 E - Altitude 1040 m
19 April 08:00
Temperature +1°C
Relative humidity 100%
Wind 0 km/h
Sea level pressure 1005 hpa - falling
Pressure at 1042 m 887 mb
Precipitation last 6h 0.0 mm
Skies mostly cloudy
Visibility 20000 m
Altitude 3845 m
19 April 08:00
Temperature -20°C
Wind -- km/h
Altitude 2250 m
19 April 08:00
Snow depth 70 cm
Wind 15 km/h
Gusts 30 km/h
Temperature -9°C