Mt Itajiki Hangglider Area
📍 Ibaraki · Nearest city: Iwase (9 km)
56 XC score / 100 · takeoff at 297 m · 📍 View on map
Coordinates and external links
36.31780, 140.18800Forecast next days
Updated: 2026-04-21 01:24 UTC · Source: Open-Meteo · Thermal window 10:00–18:00 local time
Marginal conditions, cloud base ~1834 m, wind 14 km/h.
base ~1834m · wind 14 km/hMarginal conditions, cloud base ~1369 m, wind 12 km/h.
base ~1369m · wind 12 km/hMarginal conditions, cloud base ~681 m, wind 9 km/h, precipitation 1.4 mm.
base ~681m · wind 9 km/h · precip 1.4mmComposite flyability score (CAPE + LI + wind + precip + low clouds). Cross-check with local pilots before flying.
Detailed hourly weather
2026-04-21⚠️ Marginal · peak 45 at 15h
⏰ Useful window: 15:00 – 16:00
| 08 30 | 09 16 | 10 12 | 11 35 | 12 30 | 13 35 | 14 30 | 15 45 | 16 45 ☁️⚠️ | 17 30 ☁️⚠️ | 18 30 | 19 40 | 20 30 |
Peak 15h: CAPE 90 J/kg · LI 8.7 · BL top 2390 m · w* 8.0 m/s · cloud base 2646 m · 0°C at 2760 m · Pro score 58/100 · sun 36° 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: 21.4°C · Td: 2.6°C
LCL (cloud base): 2349 m
BL top: 2390 m
0°C level: 2760 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) | 3 | Medium |
| Avg thermal probability | 0.73 | Based on thousands of aggregated IGC flights |
| Solar orientation | 0.78 | Slope faces south in northern hemisphere |
| Own flight history | 0.00 | Thermals detected in platform IGC tracks |
Takeoff description
Three takeoff ramps for hang glider pilots only. Ramps all generally face S-SSW (named East, Main, West).
Rules and notes
All visiting hang glider pilots must contact a local club for a site briefing and orientation before flying and are required to adhere to all JHF regulations.
Pilot comments
mainly for HG; PG's use 'Airpark COO' or 'Ashio'
Nearby sites
Soratopia (aka Ashio / Ashio-san) (61) · Ibaraki (Air Park COO) (58) · Tsukuba -NiihariKomachi (54) · Ohira Sky Club (55) · Sky park Utsunomiya (49) · エアウィング・モーターパラグライダースクール 大里フライトエリア (5)