KLAX RJTT

Los Angeles International Airport Tokyo Haneda International Airport
Route Information
Departure

KLAX (LAX)

Distance

8,812.4 km (4,758.3 nautical miles)

Arrival

RJTT (HND)

Flight Time

295 minutes (4h 55m)

Flight Profile

Cruise Altitude: 40,000 ft (Flight Level 400)

Route calculated using great circle navigation

Turbulence Comfort Along Route Comfort View
Comfort Score: Combines turbulence probability (GTG forecast) with intensity (ZTI analysis). High scores indicate both high probability AND high intensity turbulence.
Smooth
Comfortable
Noticeable
Uncomfortable
Formula: (Probability × Intensity)
Flight Smoothness Score
8.3 /10
Smoothness
Smooth Flight
33%
Smooth
66%
Light
1%
Moderate
AI-Powered Flight Briefing
📊 17,000 data points analyzed
Advanced AI-Powered Flight Briefing
Your Flight

We analysed more than 17,000 data points along your route from Los Angeles International Airport, Los Angeles to Tokyo Haneda International Airport, Tokyo.

Your Journey Beta

2 hours and 3 hours 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 Sierra Nevada and crossing the North Pacific Ocean – these areas can sometimes cause light turbulence.

Smooth Flight

We're expecting smooth conditions throughout your flight. You can sit back and relax.

Takeoff

Takeoff should feel smooth, with calm conditions around the airport.

Winds Aloft

Winds at cruising altitude are about 68 knots. These winds may delay arrival by up to 94 minutes.

Landing

Landing should feel smooth 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
Live data from ECMWF global forecast models • 12 atmospheric pressure levels analyzed • Updated every 6 hours
Most Common
LIGHT
66% of your flight
Peak Intensity
MODERATE
Brief sections only
Route Breakdown (178 zones)
Moderate
2 zones (1%)
Light
117 zones (66%)
Smooth
59 zones (33%)
Forecast Valid: Apr 17, 12:00 UTC (Generated: Apr 17, 12:00 UTC)
Flight Timeline 4h 55min
Maximum turbulence expected per segment
Takeoff
Smooth
0:30-1:00
Light
1:00-1:30
Light
1:30-2:00
Light
2:00-2:29
Moderate
2:29-2:58
Light
2:58-3:27
Moderate
3:27-3:56
Light
3:56-4:25
Light
Landing
Light
Smooth
Light
Moderate
Severe
Longer bars indicate higher turbulence intensity. Values shown are the maximum for each time segment.
Turbulence Metrics ZTI and EDR
Comparing Two Turbulence Metrics:
  • ZTI (ZeroTurb Index): Our proprietary composite metric (0.0-1.0 scale)
  • EDR (Eddy Dissipation Rate): ICAO/WMO official standard (m^(2/3)/s scale)
ZTI Scale (Custom)
Smooth
<0.2
Light
0.2-0.5
Moderate
0.5-0.75
Severe
>0.75
EDR Scale (ICAO)
Smooth
<0.1
Light
0.1-0.4
Moderate
0.4-0.7
Severe
>0.7

Detailed Analysis Below: While flights generally follow these patterns, our advanced turbulence prediction system analyzes real-time weather data, atmospheric conditions, and pilot reports to provide you with precise, route-specific forecasts. Review the detailed metrics and interactive maps below for a comprehensive understanding of expected conditions along your flight path.

How Aircraft Size Affects Your Comfort

Did you know that the size of your aircraft can affect how turbulence feels? Larger, wide-body aircraft have more mass and inertia, which means they absorb turbulent air movements more smoothly. Smaller regional jets and turboprops are lighter, so passengers may feel more noticeable movement during the same turbulence conditions.

Important: All commercial aircraft, regardless of size, are designed and certified to safely handle even severe turbulence. The difference is only in passenger comfort - not safety.

Learn more about how aircraft size affects your turbulence experience
Technical Forecast Details Advanced Analysis

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Comprehensive Flight Profile Altitude • Wind • Turbulence

Flight Altitude Profile
  • X-axis: Distance along route (km)
  • Y-axis (left): Aircraft altitude (feet)
  • Blue = Climb phase
  • Green = Cruise phase
  • Orange = Descent phase
Pilot Reports (PIREPs)

Real turbulence reports from pilots who recently flew near your route:

  • Green = Smooth (no turbulence)
  • Yellow = Light turbulence
  • Orange = Moderate turbulence
  • Red = Severe turbulence
Wind Speed
  • Y-axis (right): Wind speed in knots
  • Sudden wind changes often indicate turbulence
  • Hover over points to see wind direction
AI Comfort Forecast
  • Y-axis (right): Comfort Score (0-70)
  • <1 = Smooth (cyan)
  • 1-25 = Light (green)
  • 25-50 = Moderate (orange)
  • >50 = Severe (red)
Tip: Look for areas where multiple indicators coincide (e.g., pilot reports + AI forecast + wind changes) to identify the most likely turbulence zones.
Global Winds Forecast ECMWF Open Data Worldwide Coverage
Route-Specific Forecast: Wind data calculated at 178 waypoints along your flight path using high-resolution ECMWF global weather model (0.25° grid, ~25km resolution).
Minimum Winds
34 kt
39 mph
Average Winds
68 kt
78 mph
Maximum Winds
118 kt
136 mph
Valid: Apr 17, 18:00 UTC
Source: European Centre for Medium-Range Weather Forecasts
Flight Planning: Headwinds increase flight time and fuel consumption. Tailwinds decrease both. Strong crosswinds may affect takeoff/landing at airports.
Wind Impact Analysis FAIR
Wind Assessment: Moderate headwinds (58 kt avg) will moderately increase flight time. This is typical for this route.
Route Wind Breakdown
Headwinds
155 zones (87%)
Crosswinds
22 zones (12%)
Strong headwinds averaging 58 kt - longer flight time expected
Flight Time Impact
58 kt
Avg Headwind
+94 min
Time Impact
Slower than normal
Wind Range:
• Max Tailwind: 0 kt
• Max Headwind: 106 kt
• Max Crosswind: 74 kt
Wind Speed Along Route ECMWF Forecast
ZeroTurb Index (ZTI) Analysis Custom Algorithm
What is ZTI? Our proprietary ZeroTurb Index combines three meteorological indicators to give you a comprehensive turbulence probability (0.0-1.0 scale). The chart below shows how each component contributes to the overall ZTI along your route:
  • Richardson Number (Ri): Atmospheric stability - lower values indicate CAT risk
  • Wind Shear Index (WSI): Rate of wind speed/direction changes
  • Temperature Gradient Index (TGI): Frontal boundary strength
  • ZTI (Composite): Proprietary composite of the three indices above
ZTI Thresholds: Smooth: 0.0-0.2 Light: 0.2-0.5 Moderate: 0.5-0.75 Severe: 0.75-1.0
Scientific GTG Analysis NOAA Standards
For Aviation Professionals: This section shows turbulence zones using conservative NOAA GTG thresholds. These scientific thresholds are more cautious than the user-friendly "Comfort View" above, which better represents typical passenger experience.

Note: Modern aircraft are designed to handle moderate turbulence effortlessly. What scientific models classify as "moderate" often goes unnoticed by passengers due to advanced flight control systems and aircraft structural design. Most commercial flights encounter some level of atmospheric turbulence that the aircraft manages automatically.
Zone Distribution (Scientific Thresholds)
12%
Smooth (<15%)
21 zones
3%
Light (15-30%)
6 zones
83%
Moderate (30-50%)
148 zones
2%
Severe (≥50% prob)
3 zones
Threshold Comparison
Category Comfort View Scientific (NOAA)
Smooth <20% probability <15% probability
Light 20-50% 15-30%
Moderate 50-75% 30-50%
Severe ≥75% ≥50%
Turbulence Probability Along Route GTG Forecast
Low (0-30%)
Light or no turbulence
Medium (30-50%)
Moderate turbulence likely
High (50-70%)
Moderate-severe expected
Extreme (70-100%)
Severe turbulence
Active Turbulence Warnings (AIRSIGMETs) Loading...
Lightning Activity (Last Hour) Severe Activity

708

Total Strikes

3 min ago

Latest Strike

Active

Ongoing Activity

1 hour

Time Window
Lightning strikes near your route indicate convective activity (thunderstorms). Active storms detected within the last 15 minutes. Areas with lightning typically have severe turbulence, icing, hail, and strong winds. Avoid these areas by at least 20 nautical miles.
Pilot Reports (PIREPs) - 1 Reports
What are PIREPs? Pilot Reports (PIREPs) are real-time observations from pilots flying the route. They provide the most accurate turbulence information available.
Time (UTC) Intensity Altitude Aircraft Report
Airport Forecasts (TAF) - Next 24-30 Hours
Departure: KLAX
Valid: Apr 17 17:00 - Apr 18 18:00 UTC
17:00 - 17:30 UTC
Wind: 100° at 7 kt
Visibility: 6+ SM
Clouds: FEW 1500 ft, SCT 3000 ft, BKN 14000 ft
FM 17:30 - 20:00 UTC
Wind: 250° at 6 kt
Visibility: 6+ SM
Clouds: SCT 14000 ft
FM 20:00 - 04:00 UTC
Wind: 250° at 12 kt
Visibility: 6+ SM
Clouds: SKC
FM 04:00 - 06:00 UTC
Wind: 250° at 6 kt
Visibility: 6+ SM
Clouds: SKC
FM 06:00 - 18:00 UTC
Visibility: 6+ SM
Clouds: SCT 1800 ft
Raw TAF: 
TAF KLAX 171655Z 1717/1818 10007KT P6SM FEW015 SCT030 BKN140 FM171730 25006KT P6SM SCT140 FM172000 25012KT P6SM SKC FM180400 25006KT P6SM SKC FM180600 VRB03KT P6SM SCT018
Arrival: RJTT
Forecast Valid: Apr 17 18:00 - Apr 19 00:00 UTC
18:00 - 00:00 UTC
Wind: 20° at 4 kt
Visibility: 6+
Clouds: FEW at 1500 ft BKN at 3000 ft
BECMG 00:00 - 15:00 UTC
Wind: 140° at 6 kt
Visibility: 6+
Clouds: FEW at 1500 ft BKN at 3000 ft
BECMG 15:00 - 18:00 UTC
Wind: 300° at 6 kt
Visibility: 6+
Clouds: FEW at 1500 ft BKN at 3000 ft
BECMG 18:00 - 00:00 UTC
Wind: 20° at 10 kt
Visibility: 6+
Clouds: FEW at 1500 ft BKN at 3000 ft
Raw TAF: 
TAF RJTT 171705Z 1718/1900 02004KT 9999 FEW015 BKN030 BECMG 1800/1802 14006KT BECMG 1815/1818 30006KT BECMG 1818/1821 02010KT
About TAF: Terminal Area Forecasts (TAF) provide detailed 24-30 hour weather forecasts for airports, including wind, visibility, cloud ceiling, and weather phenomena. Updated every 6 hours by NOAA Aviation Weather Center.
Current Airport Weather (METAR)
Departure: KLAX
Temperature: 19°C (66°F) | Dewpoint: 10°C
Wind: 290° at 3 kt
Sky: SCT1700 SCT3000 (Base: 1700 ft)
Flight Category: VFR
Altimeter: 1016.30 inHg (1016 mb)
Observed: Apr 17 17:53 UTC
Raw METAR: 
METAR KLAX 171753Z 29003KT 10SM SCT017 SCT030 19/10 A3001 RMK AO2 SLP163 T01890100 10194 20133 51012
Arrival: RJTT
Temperature: 14°C (57°F) | Dewpoint: 11°C
Wind: 50° at 4 kt
Sky: BKN3000 (Base: 3000 ft)
Flight Category: MVFR
Altimeter: 1019.00 inHg
Observed: Apr 17 18:30 UTC
Raw METAR: 
METAR RJTT 171830Z 05004KT 9999 BKN030 14/11 Q1019 NOSIG
About METAR: Meteorological Aerodrome Reports (METAR) provide current weather observations from airports, including temperature, wind, visibility, clouds, and atmospheric pressure. Updated hourly by NOAA Aviation Weather Center. Flight Categories: VFR (Good), MVFR (Marginal), IFR (Instrument Flight Rules), LIFR (Low Instrument Flight Rules).
Route Segment Analysis

The route has been divided into segments of approximately 500km each for detailed analysis.

Route Map With GTG Forecast Overlay
Data Sources & Our Approach
ZeroTurb's Custom Algorithm: Unlike generic turbulence forecasts, we've developed a proprietary ZeroTurb Index (ZTI) algorithm that combines three meteorological indices weighted by their predictive accuracy. This gives you transparent, passenger-focused turbulence probability (0.0-1.0 scale) instead of vague categories. Our approach processes raw ECMWF atmospheric data through custom calculations to detect Clear-Air Turbulence (CAT), wind shear zones, and frontal boundaries that cause bumpy rides.

This forecast integrates data from:

Disclaimer: This forecast is for informational purposes only. Always consult official aviation weather sources and follow ATC guidance.

How accurate are turbulence alerts? Alerts are based on updated forecast models and pilot reports, and can change as departure approaches.

Flight Insights & Recommendations

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