CHAMONIX VALLEY AND MONT-BLANC AREA WEATHER FORECAST
ISSUED AT 08:40 THURSDAY MAY 23 2013
VALID FROM : THURSDAY MAY 23 -- UNTIL : TUESDAY MAY 28 2013
Ah spring spring
How great is spring !
and so on
Temporary isobaric neck over the Alps between two lows, over Southern Scandinavia and Central Italy. The Scandinavian low, 993 hpa, linked to an altitude cold drop, is moving south and expected to triggering a rainy deterioration during the afternoon. Rain-snow limit dropping below 1000 m overnight and by Friday morning. Probably not improving noticeably before Monday.
TODAY - THURSDAY MAY 23 2013
SKY CONDITION : cloudy with sunny spells in the morning - clear high up with cloud patches towards 2000-2500 m - increasing cloud from the north during the afternoon - mostly cloudy to overcast at night. Period of sunshine close to 40%.
PRECIPITATION : starting up during the afternoon, light to moderate - rain-snow limit towards 1600 m, dropping towards 1200 m.
WIND - ground level : variable light.
WIND - mid mountain : NW light to moderate.
WIND - high mountain : NW -> W moderate - moderate to strong at times.
TEMPERATURE : low +5°C - high +11°C.
ISOTHERM 0°C : 1800 -> 2000 -> 1400 m.
ISOTHERM -10°C : 3600 -> 3400 m.
SKY CONDITION : overcast or mostly cloudy.
PRECIPITATION : showers - frequent and locally fairly heavy in the first of the night - becoming scattered later - rain-snow limit towards 1200 m, dropping towards 800 m.
WIND - aloft : W moderate -> variable light -> NNW light to moderate.
TEMPERATURE : low -1°C.
FRIDAY MAY 24
SKY CONDITION : mostly cloudy - at times, cloudy with sunny spells. Period of sunshine close to 30%.
PRECIPITATION : showers, more frequent in the afternoon - rain-snow limit towards 900 m, rising up towards 1200 m.
WIND - aloft : NNW light to moderate -> NW moderate to strong -> W moderate.
TEMPERATURE : low -1 °C - high +5°C.
SATURDAY MAY 25
SKY CONDITION : mostly cloudy. Period of sunshine close to 5%.
PRECIPITATION : showers, with possible local thunderstorm - rain-snow limit towards 1200 m.
WIND - aloft : mainly S - light.
TEMPERATURE : rising slightly.
EXTENDED OUTLOOK UNTIL TUESDAY MAY 28 2013
Sunday : still unsettled and cold - mainly cloudy - scattered showers - snow towards 1300 m. Monday : improving - fairly sunny - getting milder. Tuesday : sunny morning - rainy deterioration at night.
Forecast reliability : fairly good until Saturday - poor thereafter.