ISSUED AT 09:42 MONDAY SEPTEMBER 14 2009
VALID FROM : MONDAY SEPTEMBER 14 -- UNTIL : SATURDAY SEPTEMBER 19 2009
GENERAL SYNOPSIS
High 1035 hpa, north of Scotland, drifting slowly northeast. Low 1008 hpa, Genoa Gulf, almost stationary until Thursday, causing high instability over Nothern Italy. By the same time, an altitude cold low is slowly drifting from Germany over France and further towards Spain, triggering even more instablility over a large eastern half of France. The outlook is uncertain.
TODAY - MONDAY SEPTEMBER 14 2009
Changeable and cool - cloudy with sunny spells - afternoon shower risk
SKY CONDITIONS
(cloud - sunshine) : low cloud early in the morning, then partly cloudy - locally mostly cloudy in the afternoon due to cumulus cloud growth - period of sunshine close to 50%.
PRECIPITATIONS : afternoon shower risk.
WIND - ground level : variable light.
- mid mountain : NNE -> N light.
- high mountain : NNW -> W -> SW moderate.
TEMPERATURE : min +9°C - maxi +16°C.
ISOTHERM 0°C : 2800 -> 2600 m.
ISOTHERM -10°C : 4500 m.
OVERNIGHT
Low cloud - partly cloudy high up - cool
SKY CONDITIONS
(cloud) : partly cloudy high up, but probably overcast below 2500 m.
PRECIPITATIONS : none.
WIND - aloft : SW moderate.
TEMPERATURE : +6°C.
TOMORROW - TUESDAY SEPTEMBER 15
Changeable and cool - sunny spells in the morning - showers later
SKY CONDITIONS
(cloud - sunshine) : partly cloudy to cloudy with sunny spells in the morning - cloudy or locally mostly cloudy in the afternoon due to cumulus cloud growth - period of sunshine close to 50%.
PRECIPITATIONS : scattered showers in the afternoon - rain-snow limit towards 2400 m.
WIND - aloft : SSW moderate to strong.
TEMPERATURE : min +6°C - max +16°C.
WEDNESDAY SEPTEMBER 16
Gloomy - possible fleeting sunny spell in the morning - locally heavy showers
SKY CONDITIONS
(cloud - sunshine) : mostly cloudy in the morning - possible fleeting sunny spell - overcast in the afternoon - period of sunshine close to 20%.
PRECIPITATIONS : scattered showers in the morning - more frequent and locally heavy in the afternoon - rain-snow limit towards 2600 m.
WIND - aloft : SSE moderate.
TEMPERATURE : rising.
EXTENDED OUTLOOK UNTIL SATURDAY SEPTEMBER 19 2009
Thursday to Saturday : changeable - sunny spells - decreasing shower risk.
Forecast reliability :
poor.