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Denver, United States
DEN (Denver, United States) sits at 39.86°N, 104.67°W, 5,431 ft elevation — with the Rocky Mountains nearby.
Gateway to the Rocky Mountains and major connecting hub.
Computed from DEN's geography and climate
At 5,431 ft, DEN's elevation reduces climb performance compared with sea-level airports — afternoon thermals and mechanical turbulence in the first few thousand feet of climbout are felt for longer. Denver sits squarely under the mid-latitude-latitude jet, north of which most long-haul corridors run. Clear-air turbulence (CAT) at cruise is the most common source of bumps on departures from here, especially during December–February when the jet is at its strongest. The Rocky Mountains sit upwind of DEN 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 Rocky Mountains at near-perpendicular angles. Warm-season convection (June–August) drives the dominant turbulence pattern from DEN — afternoon thunderstorm cells are routed around but their wake turbulence and gust fronts can still affect arrivals and departures.
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.
Mountain wave turbulence is common due to proximity to the Rockies. Winds flowing over the mountains create atmospheric waves that can affect flights at cruise altitude. Winter and spring see the most turbulence.
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 Rocky Mountains peaks in the cold season when upper-level winds blow hardest across the range.
Get a real-time turbulence forecast for any scheduled flight out of Denver International Airport, with live wind, jet-stream analysis and pilot reports.
Denver International Airport is best described as a jet-stream + mountain-wave corridor. At 5,431 ft, DEN's elevation reduces climb performance compared with sea-level airports — afternoon thermals and mechanical turbulence in the first few thousand feet of climbout are felt for longer. Denver sits squarely under the mid-latitude-latitude jet, north of which most long-haul corridors run. Clear-air turbulence (CAT) at cruise is the most common source of bumps on departures from here, especially during December–February when the jet is at its strongest. The Rocky Mountains sit upwind of DEN 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 Rocky Mountains at near-perpendicular angles. Warm-season convection (June–August) drives the dominant turbulence pattern from DEN — afternoon thunderstorm cells are routed around but their wake turbulence and gust fronts can still affect arrivals and departures.
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 Rocky Mountains peaks in the cold season when upper-level winds blow hardest across the range. Peak turbulence window: November–February (strong jet). Typically calmest: May–September.
Yes — the Rocky Mountains 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.
Sitting at 5,431 ft, density altitude is a genuine consideration — aircraft need longer takeoff rolls and climbout is shallower than at sea-level airports. That means more time in the lower atmosphere, where thermal and mechanical turbulence is most common, especially on warm summer afternoons.
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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