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Chicago, United States
ORD (Chicago, United States) sits at 41.98°N, 87.90°W, 672 ft elevation — inland.
Major hub in the Midwest with extensive domestic and international connections.
Computed from ORD's geography and climate
Chicago 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. Warm-season convection (June–August) drives the dominant turbulence pattern from ORD — afternoon thunderstorm cells are routed around but their wake turbulence and gust fronts can still affect arrivals and departures.
Climbout is usually unremarkable — most turbulence on flights from Chicago occurs at cruise rather than immediately after takeoff.
Chicago experiences significant weather variability. Winter jet stream passages and summer thunderstorms can cause turbulence. Flights over the Great Plains may encounter clear air 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.
Get a real-time turbulence forecast for any scheduled flight out of O'Hare International Airport, with live wind, jet-stream analysis and pilot reports.
O'Hare International Airport is best described as a mid-latitude jet-exposed hub. Chicago 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. Warm-season convection (June–August) drives the dominant turbulence pattern from ORD — 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. Peak turbulence window: November–February (strong jet). Typically calmest: May–September.
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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