Maison du Moulin Weather Briefing 26 May 13

CHAMONIX VALLEY AND MONT-BLANC AREA WEATHER FORECAST

Matsuo Bashō

Ah spring spring
How great is spring !
and so on

ISSUED AT 08:30 SUNDAY MAY 26 2013
VALID FROM : SUNDAY MAY 26 -- UNTIL : FRIDAY MAY 31 2013

GENERAL SYNOPSIS

Extended low area over Central Europe, filling slowly. Temporary Azores high ridge 1016 hpa reaching Switzerland, therefore starting up to improving in the afternoon, and furthermore on Monday. Low expected to coming in northwest of Scotland by Monday evening, driving a frontal trough towards Southern France, thus triggering a rainy-thundery deterioration on Tuesday after a short fœhn wind period. Cold and unsettled thereafter, probably until the end of the week.

TODAY - SUNDAY MAY 26 2013

Cool - scattered showers - some sunny spells in the afternoon

SKY CONDITION : mostly cloudy to cloudy - sunny spells spreading out later although persistent growing cumulus cloud over the slopes. Period of sunshine close to 30%.

PRECIPITATION : isolated showers - rain-snow limit rising up towards 1500 m.

WIND - ground level : variable light to moderate.

WIND - mid mountain : NW light to moderate.

WIND - high mountain : N light to moderate -> NW moderate.

TEMPERATURE : low +3°C - high +10°C.

ISOTHERM 0°C : 1400 -> 1800 m.

ISOTHERM -10°C : 2800 -> 3400 m.

OVERNIGHT

Cloudy - clearing - cold by dawn

SKY CONDITION : cloudy with clear spells at first - clear later.

PRECIPITATION : none.

WIND - aloft : NW modéré -> W light to moderate.

TEMPERATURE : low -1°C.

MONDAY MAY 27

Sunny - getting noticeably milder

SKY CONDITION : clear or partly cloudy - some afternoon cumulus cloud. Period of sunshine close to 90%.

PRECIPITATION : none.

WIND - aloft : W light to moderate -> SW moderate.

TEMPERATURE : low -1 °C - high +17°C.

TUESDAY MAY 28

Fœhn wind sunny spells in the morning - rainy-thundery deterioration later

SKY CONDITION : cloudy with fœhn wind sunny spells in the morning - becoming mostly cloudy from noon. Period of sunshine close to 35%.

PRECIPITATION : starting up from the west during the afternoon - possible local thunderstorm.

WIND - aloft : SW -> SSE moderate - fœhn wind puffs in the morning.

TEMPERATURE : rising lows.

EXTENDED OUTLOOK UNTIL FRIDAY MAY 31 2013

Wednesday : gloomy - rain, locally heavy in the morning. Thursday : unsettled and cool - showers. Friday : very uncertain - sunny spells possibly spreading out.

Forecast reliability : fairly good until Monday - poor thereafter.