Krusevo July 7th Weather Forecast Flymaster Open 2025

 

Summary of the Day forecast

The frontal activity predicted yesterday in the Balkans is moving slower than expected and has not reached this area yet. 

However SW winds will remain but also increase speed comparing to the previous day. This will make difficult to organize a decent task. 

Due to the relatively strong boundary layer activity inside the protected Krusevo valley, and potential strong valley breeze expected around 30kph on surface and due to the uncertainty of the frontal zone movement across balkans, it is important to reconsider conditions tomorrow morning by the organizers.

More Details

Barometer & trend: 1002 mb dropping from yesterday.  This will reduce air density and make thermals softer and at the same time will make inversion weaker and able to expand higher.

Temperature range DT: 22-35 = 13C which is a high temp contrast, good for thermal triggering

Dewpoint / time: 5,5 to the west, 7,5 to the east at 15.00h

Humidity: 20% in the center of Krusevo valley like yesterday, meaning the same air quality is concentrated in the middle of the valley like yesterday.

Cloud base: very high cloudbase forecasted above 3900m, lower at more humid areas

Cloud top: 6.500m+ after 14.00h

Cloud types: Cu, Cu Cong, Spreadout afte 13.30

Cloud coverage: <10% icreased after 14.00 in the valley and reducing sun energy per m2

Inversion levels: 1100 initially, later 1400, 1900 and 3400m. 

Sun Energy W/m2: 150 to the valley, 200 w/m2 above high ground which is not so strong. This means longer cycles between thermals. 

Average Thermal: +1.7m/s

Thermal at Altitude: 2m/s at 1100 inversion, 3,4m/s  1500m, +4m/s above 2000m, +5 at 2500m

Top of Thermals: 3750, most below 3300m, many below 2500m

Best Thermal Zone: 1300-3000m for fast XC

Wind Gust: 21-26kph

Ground wind: SW 12 kph

600m: SW 19 kph

1200m: SW 20 kph

1800m: SW 20 kph

2400m: SW 25 kph

3000m:  SW 25 kph

3600m: SSW 27 kph

Thermals Start Organizing: at 13.00h

Conditions Decline After: 17.00h

Peak Thermal Period: 14.00-17.00 h 

Peak Thermal time: 15.00h

XC – Duration: 4h

Estimated XC Speed: 26 kph

Potential XC – Distance: 104km

Precipitation % : <5% 

Notes: