Biel-Raemsenberg-1620
📍 Uri · Nearest city: Burglen (4 km)
60 XC score / 100 · takeoff at 1620 m · 📍 View on map
Coordinates and external links
46.89410, 8.70826Forecast next days
Updated: 2026-04-21 01:19 UTC · Source: Open-Meteo · Thermal window 10:00–18:00 local time
Very favorable day for XC, cloud base ~636 m, wind 12 km/h.
base ~636m · wind 12 km/hVery favorable day for XC, cloud base ~737 m, wind 8 km/h.
base ~737m · wind 8 km/hFlyable day, decent conditions, cloud base ~2200 m, wind 12 km/h.
base ~2200m · wind 12 km/hComposite flyability score (CAPE + LI + wind + precip + low clouds). Cross-check with local pilots before flying.
Detailed hourly weather
2026-04-21⚠️ Marginal · peak 60 at 14h
- High cloud suck (95/100) — base below freezing with CU
| 08 30 ☁️⚠️ | 09 50 ☁️⚠️ | 10 55 ☁️⚠️ | 11 50 ☁️⚠️ | 12 50 ☁️⚠️ | 13 55 ☁️⚠️ | 14 60 ☁️⚠️ | 15 55 ☁️⚠️ | 16 55 ☁️⚠️ | 17 50 ☁️⚠️ | 18 50 ☁️⚠️ | 19 40 ☁️⚠️ | 20 50 ☁️⚠️ |
Peak 14h: CAPE 10 J/kg · LI 0.7 · BL top 885 m · w* 0.0 m/s · cloud base 2620 m · 0°C at 1650 m · sun 35° 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: 14:00 (peak of the day)
Surface T: 7.1°C · Td: -0.9°C
LCL (cloud base): 1000 m
BL top: 885 m
0°C level: 1650 m
Approximate profile from surface variables + synoptic levels. Red lines = temperature, dashed blue = dew point. Orange bands = detected inversions.
🌬 Daily wind (next days)
Daily summary (10m wind). Full hour × altitude chart is being added progressively.
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 | 0.81 | Based on thousands of aggregated IGC flights |
| Solar orientation | 0.40 | Slope faces south in northern hemisphere |
| Own flight history | 0.00 | Thermals detected in platform IGC tracks |
Upcoming competitions in this country
- PWCA Italy Gemona 2026 · 2026-07-25 – 2026-08-01 · PWCA
Copa del Mundo en Gemona del Friuli, Italia
Rules and notes
Airspaces in Switzerland are a tough subject, get all the info you can get before flying. More info on http://www.flyland.ch.
Pilot comments
many, often unmarked, CABLES in the wohle valley ('Schächental')!
Nearby sites
Obfluee (45) · Rietlig (52) · Gisleralp (51) · Ratzi-Rietlig (47) · Gamperstock (50) · Wängihorn (50)