Paragliding World Cup Sopot Bulgaria Weather forecast 8th Sept

 

Summary of the Day

In general, the high NNW wind drops from 30 to 15kph. This may increase the upper atmosphere humidity. 

The day will be weaker regarding thermals, and energy flow will be lower, meaning that we will have weaker thermals with longer cycles between them.

Again we will have a wind change level above 1800m with the related turbulence, and a second inversion level at 2000m (yesterday it was 2400m)

The barometric pressure is dropping a little, meaning that we expect a slightly weaker inversion from yesterday. 

At a lower lever the humidity will increase from 22% to 36%, dropping the air density further and making thermals smoother.

Less cloud are expected mainly above the high ridges and a cloudbase of 2700m isd expected while at specific areas it is expected at 3000m. 

Cloud coverage is expected lower compared to Monday.

I believe the day is weaker with longer thermal cycles, the conditions will start working one hour later and the day will end one hour earlier. giving a 2,5h task window and a calculated XC speed of 35kph.

Details:

Barometric pressure: 1016mb 

Temperatures: 15-26 C  - colder 

Dewpoint: 7 to the mountains and 9 C in the valley.  

Humidity at low level: 36% 

Humidity Boundary layer: 50%  

Cloud base: 2700m and 3000m at higher ground

Cloud tops:  +500m

Cloud types:  Cu across the ridge

Cloud Coverage: 18% at the best areas of the ridge

Inversion levels: 1400m with wind change S to N and 2000m (lower than yesterday)

Energy flow:  60-200W/m2, less than yesterday, weaker thermals and longer thermal cycles

Average Thermal expected +2,6m/s  less than yesterday by 0,5m/s

Thermal tops: max 1900 in the valley, 2700-3000 in the ridge and 2400 to the east valley

Thermals at Altitude: +1.6m/s low, 2.8m/s at 1000m , +3m/s at 1500m   

Ideal Thermal Zone:   1200-1600m

WINDS at 14:00 

Wind Gust at Surface: 22kph at take off

0m:  South 10 kph

600m:  South 10 kph

1200m:  South 5 kph

1800m: North 18 kph  

2400m NNW 15 kph  

3000m NW 15 kph  

3600m: NW 18 kph

Conditions start Organizing: 11.00 later 1 hour

Conditions decline after: 16:00  earlier 1 hour

Conditions Best Period: 13:00-16:00h   

Conditions Peak time: at 14.00h 

Duration of Conditions:  3 h

Calculated XC Speed:  35 kph  

Expected Task Distance   75 Km for 2,5h

Convergence lines: mountain ridge

Rain Forecast:  N/S

SKEW-T