Brandberg
📍 Solothurn , Bezirk Thal · Nearest city: Welschenrohr (4 km)
62 XC score / 100 · takeoff at 1026 m · 📍 View on map
Coordinates and external links
47.29820, 7.56840Forecast next days
Updated: 2026-04-21 01:17 UTC · Source: Open-Meteo · Thermal window 10:00–18:00 local time
Flyable day, decent conditions, cloud base ~1161 m, wind 19 km/h.
base ~1161m · wind 19 km/hMarginal conditions, cloud base ~1090 m, strong wind (27 km/h).
base ~1090m · wind 27 km/hMarginal conditions, cloud base ~2181 m, wind 18 km/h.
base ~2181m · wind 18 km/hComposite flyability score (CAPE + LI + wind + precip + low clouds). Cross-check with local pilots before flying.
Detailed hourly weather
2026-04-21❌ Not recommended · peak 60 at 15h
- Very stable day (CAPE<50, LI>2) — no thermals
- High cloud suck (85/100) — base below freezing with CU
| 08 35 | 09 35 ☁️⚠️ | 10 35 ☁️⚠️ | 11 35 ☁️⚠️ | 12 40 ☁️⚠️ | 13 40 ☁️⚠️ | 14 35 ☁️⚠️ | 15 60 ☁️⚠️ | 16 60 ☁️⚠️ | 17 60 ☁️⚠️ | 18 55 ☁️⚠️ | 19 35 | 20 35 ☁️⚠️ |
Peak 15h: CAPE 10 J/kg · LI 3.6 · BL top 1590 m · w* 0.0 m/s · cloud base 2313 m · 0°C at 1750 m · Pro score 73/100 · sun 30° over slope
Hourly flyability (0–100). ⛈️ = storm risk · ☁️⚠️ = cloud suck · 🏔️ = active ridge lift. CAPE = convective energy, LI = stability, BL top = thermal ceiling, w* = estimated dry thermal velocity. Source: Open-Meteo (ECMWF/GFS/ICON blend model).
Estimated vertical profile (Sounding)
Reference time: 15:00 (peak of the day)
Surface T: 11.0°C · Td: 0.7°C
LCL (cloud base): 1287 m
BL top: 1590 m
0°C level: 1750 m
Approximate profile from surface variables + synoptic levels. Red lines = temperature, dashed blue = dew point. Orange bands = detected inversions.
Wind chart — altitude × time
Color: green < 20 km/h · yellow 20-30 · red >40. Arrows point to where the wind is blowing. Each column = 1 hour. 4 altitudes: 10m surface, 80m first thermal, 1500m (850 hPa) thermal cruise, 3000m (700 hPa) top.
Wind next days (Open-Meteo model)
Wind rose 10m — 2026-04-21
| Date | Morning 08-12h | Midday 12-16h | Evening 16-20h | |||
|---|---|---|---|---|---|---|
| 2026-04-21 | 8 km/h NE | gust 44 | 13 km/h NE | gust 40 | 12 km/h N | gust 43 |
Colors: green < 15 km/h (optimal) · orange 15-25 · red >25 (flying not recommended). ⚠️ = shear >25 km/h between 10m and 850 hPa (potentially broken thermals).
Takeoff orientations
Green = good orientation · Yellow = possible · Gray = not suitable
Why this site has thermal potential
| Factor | Value | Interpretation |
|---|---|---|
| Hotspot density (5 km) | 10 | High |
| Avg thermal probability | 0.72 | Based on thousands of aggregated IGC flights |
| Solar orientation | 0.60 | Slope faces south in northern hemisphere |
| Own flight history | 0.00 | Thermals detected in platform IGC tracks |
Takeoff description
Launch site of the local flying school. Please ask for permission before flying: www.flugschule-jura.ch
Nearby sites
Niderwiler Stierenberg (50) · Landeplatz Glutzenberg (5) · Hohe Winde (47) · Sonnenberg (59) · Röti (Weissenstein) (47) · Obere Wengi (64)