Werdtberg-1270 (Montoz sud)
📍 Bern , Jura bernois · Nearest city: Tavannes (2 km)
57 XC score / 100 · takeoff at 1272 m · 📍 View on map
Coordinates and external links
47.20660, 7.21530Forecast next days
Updated: 2026-04-21 01:22 UTC · Source: Open-Meteo · Thermal window 10:00–18:00 local time
Flyable day, decent conditions, cloud base ~1268 m, wind 17 km/h.
base ~1268m · wind 17 km/hMarginal conditions, cloud base ~1329 m, wind 18 km/h.
base ~1329m · wind 18 km/hMarginal conditions, cloud base ~2088 m, wind 18 km/h.
base ~2088m · 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 55 at 14h
- Very stable day (CAPE<50, LI>2) — no thermals
- High cloud suck (86/100) — base below freezing with CU
| 08 35 | 09 30 ☁️⚠️ | 10 30 ☁️⚠️ | 11 35 ☁️⚠️ | 12 40 ☁️⚠️ | 13 35 ☁️⚠️ | 14 55 ☁️⚠️ | 15 50 ☁️⚠️ | 16 50 ☁️⚠️ | 17 50 ☁️⚠️ | 18 25 ☁️⚠️ | 19 25 ☁️⚠️ | 20 35 ☁️⚠️ |
Peak 14h: CAPE 10 J/kg · LI 3.7 · BL top 1590 m · w* 0.0 m/s · cloud base 2359 m · 0°C at 1760 m · Pro score 53/100 · 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: 8.1°C · Td: -0.6°C
LCL (cloud base): 1087 m
BL top: 1590 m
0°C level: 1760 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) | 13 | High |
| Avg thermal probability | 0.66 | Based on thousands of aggregated IGC flights |
| Solar orientation | 0.45 | Slope faces south in northern hemisphere |
| Own flight history | 0.00 | Thermals detected in platform IGC tracks |
Pilot comments
Airspaces in Switzerland are a thought subject, get all the info you can before flying by visiting http://www.vollibrejura.ch.
Nearby sites
Werdtberg-1240 (Montoz nord) (44) · Atterrissage Corgemont (5) · Boezingenberg-920 (41) · Corgemont (42) · Boezingenberg-940 (Biel- Bienne) (45) · Montagne de Sorvilier (40)