Kansai International Airport turbulence forecast
Osaka, Japan
KIX (Osaka, Japan) sits at 34.43°N, 135.24°E, 26 ft elevation — coastal with the Japanese Alps nearby.
About KIX
Major airport serving Osaka, Japan.
- Climate
- Subtropical coastal — mild winters, humid summers
- Nearby terrain
- Japanese Alps
- Geography
- Coastal — marine-influenced airmass
What to expect on departures
Computed from KIX's geography and climate
The jet stream meanders across this latitude seasonally — KIX sees its strongest CAT exposure in December–February, when the polar jet pushes equatorward and routes intersect it more often. June-onwards departures climb into cleaner upper-level flow. The Japanese Alps sit upwind of KIX on prevailing flow days, generating mountain-wave turbulence that can extend several hundred kilometres downwind at cruise level. The lee-wave risk is highest when December–February winds at FL300 cross the Japanese Alps at near-perpendicular angles. Monsoon months pump moisture and instability into the local airmass — expect significantly more convective turbulence during the wet season at KIX, with much smoother cruise during dry-season operations. KIX's coastal position means departures often transit from the cool marine boundary layer into warmer continental air within minutes of takeoff — a brief but reliable bumpy transition on warm-season afternoons when the sea breeze is set up.
Climbout notes
Standard Instrument Departures (SIDs) often route around terrain; on strong-wind days, low-level turbulence in the lee of the hills is common in the first few thousand feet.
Seasonal pattern
Winter (December–February) brings the strongest jet-stream activity — that's when long-haul departures most often log clear-air turbulence at cruise. Summer (June–August) is peak thunderstorm season — convective turbulence is the dominant warm-season risk. Mountain-wave activity near the Japanese Alps peaks in the cold season when upper-level winds blow hardest across the range.
- Peak turbulence
- Monsoon months (varies by hemisphere)
- Typically calmest
- Dry season
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Popular routes from KIX
KIX turbulence FAQ
Is turbulence common on flights from KIX?
Kansai International Airport is best described as a mountain-wave sensitive airport. The jet stream meanders across this latitude seasonally — KIX sees its strongest CAT exposure in December–February, when the polar jet pushes equatorward and routes intersect it more often.
When is turbulence worst for Osaka flights?
Winter (December–February) brings the strongest jet-stream activity — that's when long-haul departures most often log clear-air turbulence at cruise. Peak turbulence window: Monsoon months (varies by hemisphere). Typically calmest: Dry season.
Does the terrain around Osaka affect turbulence?
Yes — the Japanese Alps lie close enough to generate mountain-wave turbulence on days with strong upper-level winds. These waves can propagate hundreds of kilometres downwind, so they sometimes affect cruise even after you've left the immediate area.
How accurate are Turbcast forecasts?
We combine live NOAA Aviation Weather Center data (PIREPs, SIGMETs, AIRMETs) with physics-based Ellrod and Richardson-number calculations derived from Open-Meteo pressure-level wind and temperature data. If a source is unavailable for a waypoint we show an em dash rather than invent a number.
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