X-Alps Weather Forecast for Aosta region Friday 20th June 25

 

Summary - Fly away fast or get caught by the rain

Instability and potential rain will effect the southern Alps, across all the way to the TP11. 

Humid air from North Italy will arrive with an impact in the Aosta region.

Thermals will start working from 10.30, but soon they will evolve to clouds. The cloud base will drop at 15.00 around the Aosta region and shower clouds are expected to have an impact on the strategies the pilots will have to follow. It seems that the most effective line will pass north from the region, offering a couple of more flying hours for the first pilots, while the pilots behind will be able to run faster in the Northern side of the mountains in their way to TP10 and will reduce their gap with the first.

The barometer at 1011, dropping from yesterday and humidity at 50% in the Northern areas and 75% in the Aosta valley. The air density will decrease and thermals will be relatively weak in the south east of TP 10. 

North from Aosta valley, very few clouds, potentially very high - above 4000m, while to the direction to Itally the clouds will gradually appear with a varying cloudbase of 3000 close to Aosta and more clouds are expected to the Italian side with a base of 2400 and 2100 in the Torino plateau. 

High clouds and Low clouds will create a coverage of 20-30%. 

Inversion levels of 1800 and 2600 wil have an impact on thermals behavior. 

Lift is expected arount 2m/s below 1400m and +2,7m/s at 1600, +3,2 at 1700m and 4,2 m/s at 2100m. 

Ideal thermal zone between 1800 and 2600m.

Top of Lift from 2600 to 3000 according to the area, the northern the higher

Average thermal 2m/s

Gusts 10-15kph

winds at altitude

0m SE 10

600m NW 10

1200m NW 10

1800m NW 10

2400m no wind

3000m SW 10

Day will start at 10.30h

Conditions decline rapidly after 15.00 in the isolated Showers regions

Best period 13.00-15.00

Peak conditions at 15.00 with rain

XC potential Speed 30kph

Potential XC flight 90 km

Good luck and keep safe

Evangelos