Your Flight
We analysed more than 900 data points along your route from Nashville International, Nashville to St. Louis Lambert International Airport, St Louis.
Southwest Airlines
BNA
STL
WN2309
Southwest Airlines · Live forecast
BNA
→
STL
Also sold as:
75
Calm Score
"Mostly smooth — one short bumpy section you'll handle."
1h 20m
Duration
236 nm
Distance
24,000 ft
Cruise Altitude
VERY HIGH
Confidence
Turbulence comfort along route
Comfort score combines turbulence probability with intensity — higher means rougher
Smooth
Light
Moderate
Severe
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Beta
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We know turbulence can feel scary — especially on long flights.
This report is built for you: what bumps feel like, when they happen, and why you'll be completely safe. 1 in 3 passengers feel exactly like you.
Right now on your route
Live pilot reports from aircraft flying BNA → STL
14 pilot reports along this route
9 / 14
Reporting smooth
2 / 14
Light turbulence
3
Moderate or worse
Latest pilot reports
Smooth
CHA UA /OV CHA 10W/TM 1215/FL023/TP E170/SK BKN023-TOP060/TB NEG/IC NEG
5m ago
Smooth
EVV UA /OV EVV/TM 1212/FLDURD/TP A320/RM LLWS +/-10 500AGL
8m ago
Smooth
DAB UA /OV OVR-OMN/TM 1211/FL040/TP P28A/SK TOPS OVC025
9m ago
Moderate
MKL UA /OV MKL045055/TM 1210/FL340/TP B39M/TB CONS MOD CHOP/RM ZME 26
10m ago
Light
EVV UA /OV LWV050013/TM 1206/FL350/TP CRJ9/TB CONS LGT
14m ago
AI-powered flight briefing
900 data points analyzed
· VERY HIGH confidence
Your Journey Beta
1 hour into the flight: Some moderate bumps expected.
The crew may adjust altitude or ask you to stay seated during these sections.
The rest of the flight should be smooth.
Your route takes you over the Appalachian Mountains – conditions there can sometimes cause light turbulence.
Mostly Smooth
Overall conditions look mostly smooth with occasional light bumps. Nothing to worry about.
Takeoff
Takeoff should feel smooth with possible light bumps, with calm conditions around the airport.
Winds Aloft
Winds at cruising altitude are about 44 knots.
Landing
Landing should feel smooth with possible light bumps with typical approach conditions.
You're in Safe Hands
If you feel nervous at any point, remember that turbulence is expected, safe, and part of normal flying. The crew is monitoring everything, and the aircraft is built to handle far more than anything you will feel. Have a safe and calm flight.
Relaxation Exercises
ZeroTurb Index (ZTI): Powered by our turbulence prediction algorithm combining atmospheric Richardson Number, wind shear analysis, temperature gradients, and geomagnetic activity. Learn more
Flight Timeline 1h 20min
Maximum turbulence expected per segment
Takeoff
Light
0:15-0:40
Light
0:40-1:05
Moderate
Landing
Smooth
Smooth
Light
Moderate
Severe
Longer bars indicate higher turbulence intensity. Values shown are the maximum for each time segment.
Airport conditions
Live weather at departure and arrival
BNA
Nashville International — Departure
Wind
13 kt G25 (290°)
Sky
Broken
Temperature
3°C
Conditions
VFR — Clear conditions, no delays expected
STL
St. Louis Lambert International Airport — Arrival
Visibility
7 mi
Wind
18 kt G29 (300°)
Sky
Broken
Temperature
-5°C
Conditions
MVFR — Reduced visibility, minor delays possible
Your flight details
Departure timing and aircraft information
Evening Flight Departure
Time of day
Evening Flight
Tip
Evening and night flights typically offer smoother conditions as thermal activity subsides and the atmosphere stabilizes after sunset.
When
Tomorrow — conditions may change
Data sources & our approach
ZeroTurb's Custom Algorithm: Our proprietary
ZeroTurb Index (ZTI) combines three meteorological indices weighted by their
predictive accuracy — giving you transparent, passenger-focused turbulence probability instead
of vague categories.
This forecast integrates data from:
- ECMWF Open Data — Global atmospheric model (wind/temperature at 13 flight levels)
- NOAA Aviation Weather Center — Pilot Reports (PIREPs), SIGMETs/AIRMETs, TAFs
- NOAA Space Weather Prediction Center — Aurora forecasts for polar routes
- AviationStack API — Flight schedules and airline operational data
Disclaimer: This forecast is for informational purposes only. Always consult official aviation weather sources and follow ATC guidance.